Patent Application
20230077402
The present disclosure generally relates to anchorage devices and methods configured for anchoring an implantable medical device within a body, wherein the anchorage device comprises at least one hemostatic agent and at least one antibiotic that are configured to elute over time.
Some known anchorage devices may be used to secure an implantable medical device within a body of a patient. The anchorage device and implantable medical device can be inserted into a desired location within the body of the patient. The anchorage device can be used to help anchor or support the implantable medical device to surrounding tissue. Some known anchorage devices are used to provide temporary support to tissue during a healing process. For example, some known anchorage devices can secure one portion of tissue to another portion of tissue.
Infection and bleeding are the most serious complications after surgery. The estimated increase in costs due to surgical site infections (SSIs) was $11,876 for SS's overall ($7003 for superficial and $25,721 for deep infections). However, within the current $6 billion hemostat market, there are few produces that can address this unmet need. It would therefore be desirable to stop or reduce the flow of blood at a surgical site while anchoring the implantable medical device to tissue. Some known anchorage devices are made at least partially from and/or are configured to release collagen to stop or reduce the flow of blood. However, the collagen used in such devices is a heavily processed version of collagen that has undergone milling, acid treatment, and has been pepsinized. The processing steps enable collagen to be readily solubilized and cast into films, but also results in a reduction of molecular weight and potentially denatures the protein structure. In particular this processing can affect collagen's triple helical peptides, which are a native sequence that binds to receptors on platelets helping stimulate platelet aggregation. This disclosure describes an improvement over these prior art technologies.
New anchorage devices and methods are provided to help anchor or support an implantable medical device to surrounding tissue. In one embodiment, in accordance with the principles of the present disclosure, a surgical device includes a substrate and a first coating that covers at least a portion of the substrate. The first coating comprises a first polymer. The first coating has antibiotics and/or other active pharmaceutical ingredients API(s) dispersed in the first polymer such that the first polymer releases the antibiotics and/or other APIs as the first polymer degrades. A second coating covers at least a portion of the first coating. The second coating comprises a second polymer. The second polymer comprises an alginate. The second coating has a hemostatic agent dispersed in the second polymer such that the second polymer releases the hemostatic agent as the second polymer degrades. The hemostatic agent is selected from the group consisting of epinephrine, tranexamic acid, chitosan and oxidized regenerated cellulose.
In one embodiment, in accordance with the principles of the present disclosure, a surgical device includes a substrate made from a first polymer. The substrate comprises antibiotics and/or other API(s) dispersed in the first polymer such that the first polymer releases the antibiotics and/or other API(s) as the first polymer degrades. A coating covers at least a portion of the substrate. The coating comprises a second polymer. The second polymer comprises an alginate. The second coating has a hemostatic agent dispersed in the second polymer such that the second polymer releases the hemostatic agent as the second polymer degrades. The hemostatic agent being selected from the group consisting of epinephrine, tranexamic acid, chitosan and oxidized regenerated cellulose.
In one embodiment, in accordance with the principles of the present disclosure, a surgical device includes a substrate and a first coating that covers at least a portion of the substrate. The first coating comprises a first polymer. The first coating has antibiotics and/or other API(s) dispersed in the first polymer such that the first polymer releases the antibiotics and/or other API(s) as the first polymer degrades. A second coating covers at least a portion of the first coating. The second coating comprises a second polymer. The second polymer comprises an alginate. The second coating has tranexamic acid agent dispersed in the second polymer such that the second polymer releases the tranexamic acid as the second polymer degrades. The substrate includes a mesh made from a plurality of fibers. The first coating directly engages the fibers such that the first coating extends 360 degrees about each of the fibers along at least a portion of a length of each of the fibers. The second coating directly engages the first coating such that the second coating extends less than 360 degrees about each of the fibers along at least a portion of the length of each of the fibers. The first polymer comprises a tyrosine-derived polyarylate. The alginate is selected from the group consisting of Sodium Alginate and Calcium Alginate. In some embodiments, the alginate has a molecular weight ranging from low to high (Viscosity of 1% solution of 10-2000 cps) and a range of ratios in mannuronic acid to gluluronic acid. In some embodiments, the alginate can exist in natural or oxidized form. In some embodiments, esterified hydroxyl groups on Alginate are used. The antibiotics are selected from the group consisting of rifampin and minocycline, and mixtures thereof.
Additional features and advantages of various embodiments will be set forth in part in the description that follows, and in part will be apparent from the description, or may be learned by practice of various embodiments. The objectives and other advantages of various embodiments will be realized and attained by means of the elements and combinations particularly pointed out in the description and appended claims.
The present disclosure will become more readily apparent from the specific description accompanied by the following drawings, in which:
For the purposes of this specification and appended claims, unless otherwise indicated, all numbers expressing quantities of ingredients, percentages or proportions of materials, and other numerical values used in the specification and claims, are to be understood as being modified in all instances by the term “about.” Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
Notwithstanding the numerical ranges and parameters set forth herein, the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements. Moreover, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein. For example, a range of “1 to 10” includes any and all subranges between (and including) the minimum value of 1 and the maximum value of 10, that is, any and all subranges having a minimum value of equal to or greater than 1 and a maximum value of equal to or less than 10, e.g., 5.5 to 10.
Post operative hematoma formation following the implantation of electronic implantable devices (EIDs) is a significant device related complication. It can result in increased patient pain, an increased risk of infection, and may necessitate surgical intervention. Essebag, V. Verma, A., et al. Clinically significant pocket hematoma increases long-term risk of device infection. Journal of The American College of Cardiology, 2016. The widespread use of anticoagulant and antiplatelet medications has been attributed to increasing the risk of pocket related hematomas. The reported frequency of EID-related hematomas varies, but it is believed to be 2-5%. Chen, Y., Li, Y., Gao, M. et al. Incidence of pocket hematoma after electrophysiological device placement: dual antiplatelet therapy versus low-molecular weight heparin regimen. Journal of Geriatric Cardiology, 2014. Patients taking anticoagulant and antiplatelet therapies have a higher chance of developing a hematoma, resulting in clinicians looking for solutions.
As briefly discussed above, the collagen used in conventional anchorage devices is a heavily processed version of collagen that has undergone milling, acid treatment, and has been pepsinized. The processing steps enable collagen to be readily solubilized and cast into films. Adversely, it also results in a reduction of molecular weight and potentially denatures the protein structure. In particular this processing can affect collagen's triple helical peptides, which are a native sequence that binds to receptors on platelets helping stimulate platelet aggregation. Smethurst, P. A., Onley, D. J., Jarvis, G. E., et al. Structural basis for the platelet-collagen interaction. Journal of Biological Chemistry, 2006; and Meyer, M. Processing of collagen based biomaterials and the resulting materials properties. Biomedical Engineering Online, 2019.
There are numerous biopolymers available that have similar film forming and solubility properties as processed collagen, while simultaneously having the potential to provide some hemostatic benefit. One example is sodium alginate. Rembre, J., Bohm, J. K., Fromm-Dornieden, C., et al. Comparison of hemostatic dressings for superficial wounds using a new spectrophotometric coagulation assay. Journal of Translational Medicine, 2015; and Timmons, J. Alginates as haemostatic agents: worth revisiting? Wounds, 2009. Across the literature, alginates have been used as hydrogels, vehicles of drug delivery, and scaffolds for wound regeneration. Yong Lee, K., Mooney, D. J. Alginate: properties and biomedical applications. Progress in Polymer Science, 2013. Alginate wound dressings have been successfully commercially marketed under brand names including AlgiSite (Smith and Nephew), Biatain Alginate Ag (Coloplast) and Tegaderm Alginate Ag Silver Dressing (3M). These products have demonstrated that alginate has a satisfactory biocompatibility and a documented hemostatic effect.
In view of the foregoing, this disclosure is directed to a surgical device that is based on sodium or calcium alginate in lieu of collagen. Alginate containing films in vitro showed an ability to clot blood quicker than collagen containing tranexamic acid films. As such, the surgical device of the present disclosure utilizes an alginate-based film containing tranexamic acid with a TYRX envelope in order to help reduce the bleeding. In some embodiments, alternative modalities can help enhance hemostatic activity or help plasticize the film coatings to make it softer and less rigid. This includes incorporation of glycerol, short chain carbohydrates such as sorbitol, mannitol, or incorporation of carboxymethylcellulose. Other plasticizers that are Generally Recognized as Safe “Gras” such as triethyl citrate, citrate esters, or propylene glycol.
The surgical device of the present disclosure has been evaluated with in-vitro blood models. At least 20% reduction in clotting time was observed when compared to collagen based films under different blood anticoagulation conditions. In particular, the surgical device of the present disclosure in vitro showed an ability to clot blood quicker than collagen containing tranexamic acid films.
Reference will now be made in detail to certain embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the illustrated embodiments, it will be understood that they are not intended to limit the invention to those embodiments. On the contrary, the invention is intended to cover all alternatives, modifications, and equivalents that may be included within the invention as defined by the appended claims.
This disclosure is directed to a surgical system 15. In some embodiments, system 15 includes one or more anchorage devices, such as, for example, an anchorage device 20, as shown in
Various components of anchorage device 20 may have material composites, including the above materials, to achieve various desired characteristics such as strength, rigidity, elasticity, compliance, biomechanical performance, durability and radiolucency or imaging preference. The components of anchorage device 20, individually or collectively, may also be fabricated from a heterogeneous material such as a combination of two or more of the above-described materials. The components of anchorage device 20 may be monolithically formed, integrally connected or include fastening elements and/or instruments, as described herein.
Anchorage device 20 is configured to be coupled to and/or applied to a device, such as, for example, a medical device 25, as shown in
Implantable medical devices may also include, for example, surgical devices such as sutures of all types, anastomosis devices (including anastomotic closures), suture anchors, hemostatic barriers, screws, plates, clips, vascular implants, tissue scaffolds, cerebro-spinal fluid shunts, shunts for hydrocephalus, drainage tubes, catheters including thoracic cavity suction drainage catheters, abscess drainage catheters, biliary drainage products, and implantable pumps. Implantable medical devices may also include, for example, orthopedic devices such as joint implants, acetabular cups, patellar buttons, bone repair/augmentation devices, spinal devices (e.g., vertebral disks and the like), bone pins, cartilage repair devices, and artificial tendons. Implantable medical devices may also include, for example, dental devices such as dental implants and dental fracture repair devices. Implantable medical devices may also include, for example, drug delivery devices such as drug delivery pumps, implanted drug infusion tubes, drug infusion catheters, and intravitreal drug delivery devices. Implantable medical devices may also include, for example, ophthalmic devices such as scleral buckles and sponges, glaucoma drain shunts and intraocular lenses.
Implantable medical devices may also include, for example, urological devices such as penile devices (e.g., impotence implants), sphincter, urethral, prostate, and bladder devices (e.g., incontinence devices, benign prostate hyperplasia management devices, prostate cancer implants, etc.), urinary catheters including indwelling (“Foley”) and non-indwelling urinary catheters, and renal devices. Implantable medical devices may also include, for example, synthetic prostheses such as breast prostheses and artificial organs (e.g., pancreas, liver, lungs, heart, etc.). Implantable medical devices may also include, for example, respiratory devices including lung catheters. Implantable medical devices may also include, for example, neurological devices such as neurostimulators, neurological catheters, neurovascular balloon catheters, neuro-aneurysm treatment coils, and neuropatches, splints, ear wicks, ear drainage tubes, tympanostomy vent tubes, otological strips, laryngectomy tubes, esophageal tubes, esophageal stents, laryngeal stents, salivary bypass tubes, and tracheostomy tubes. Implantable medical devices may also include, for example, oncological implants. Implantable medical devices may also include, for example, pain management implants.
In some embodiments, anchorage device 20 is configured to be coupled to and/or applied to or to surround and/or enclose at least a portion of a non-implantable medical device, as discussed herein. Non-implantable devices can include dialysis devices and associated tubing, catheters, membranes, and grafts; autotransfusion devices; vascular and surgical devices including atherectomy catheters, angiographic catheters, intraaortic balloon pumps, intracardiac suction devices, blood pumps, blood oxygenator devices (including tubing and membranes), blood filters, blood temperature monitors, hemoperfusion units, plasmapheresis units, transition sheaths, dialators, intrauterine pressure devices, clot extraction catheters, percutaneous transluminal angioplasty catheters, electrophysiology catheters, breathing circuit connectors, stylets (vascular and non-vascular), coronary guide wires, peripheral guide wires; dialators (e.g., urinary, etc.); surgical instruments (e.g. scalpels and the like); endoscopic devices (such as endoscopic surgical tissue extractors, esophageal stethoscopes); and general medical and medically related devices including blood storage bags, umbilical tape, membranes, gloves, surgical drapes, wound dressings, wound management devices, needles, percutaneous closure devices, transducer protectors, pessary, uterine bleeding patches, PAP brushes, clamps (including bulldog clamps), cannulae, cell culture devices, materials for in vitro diagnostics, chromatographic support materials, infection control devices, colostomy bag attachment devices, birth control devices; disposable temperature probes; and pledgets.
Anchorage device 20 can have a variety of different configurations, shapes and sizes. For example, anchorage device 20 can be provided with a size and shape or other configuration that can provide the functionality of supporting and immobilizing medical device 25 at a treatment site within a patient's body, while also improving the removability of anchorage device 20 after the treatment has been completed. In some embodiments, medical device 25 can be disposed within a pocket defined by anchorage device 20 and anchorage device 20 can be implanted and secured to tissue at a desired treatment site within a body of a patient. As discussed herein, during implantation, scar tissue can form at the treatment site and/or tissue can become ingrown within anchorage device 20. After the treatment is completed, medical device 25 can remain in the patient as discussed below or can be removed from the patient leaving anchorage device 20 implanted. To remove anchorage device 20, tissue that is ingrown within anchorage device 20 can be cut or otherwise detached from anchorage device 20. In some embodiments, a portion of anchorage device 20 may not be removable from the tissue and will remain implanted within the patient.
In some embodiments, anchorage device 20 includes a substrate, such as, for example, substrate 22, as shown in
In some embodiments, substrate 22 may be formed with one or more biocompatible materials, which may be synthetic or naturally occurring. In some embodiments, the one or more biocompatible materials include, for example, polypropylene, polyester, polytetrafluoroethylene, polyamides, silicones, polysulfones, metals, alloys, titanium, stainless steel, shape memory metals (e.g. Nitinol), and/or combinations thereof.
In some embodiments, anchorage device 20 is configured to be implanted temporarily within a body of a patient and/or is configured to be removed (e.g., explanted) from the patient's body after a period of time. In such embodiments, substrate 22 may include a non-biodegradable material and/or a non-bioresorbable material. For example, substrate 22 may be made entirely from a non-biodegradable material and/or a non-bioresorbable material such that substrate 22 is made only from the non-biodegradable material and/or non-bioresorbable material. In some embodiments, substrate 22 may include one or more non-biodegradable and/or a non-bioresorbable material and one or more biodegradable and/or resorbable material. In some embodiments, one side of substrate 22 may include one or more non-biodegradable and/or a non-bioresorbable material and another side of substrate 22 can include one or more biodegradable and/or resorbable material.
As used herein, the term “biodegradable” refers to, for example, a material that can be at least partially broken down or degraded by a bodily fluid and discarded as waste from the body and/or a material that can be broken down or degraded by a living organism. Thus, “non-biodegradable” can refer to a material that cannot be broken down or degraded by a bodily fluid and/or cannot be broken down or degraded by a living organism. As used herein the term “resorbable” refers to, for example, a material that can be at least partially broken down or degraded by a bodily fluid and assimilated within the body. Thus, a “non-resorbable” material as used herein can refer to, for example, a material that cannot be broken down or degraded by bodily fluid and assimilated within the body.
In some embodiments, the biocompatible biodegradable and/or bioresorbable material or materials may include polymeric and/or non-polymeric materials, such as, for example, one or more poly (alpha-hydroxy acids), poly (lactide-co-glycolide) (PLGA), polylactide (PLA), poly(L-lactide), polyglycolide (PG), polyethylene glycol (PEG) conjugates of poly (alpha-hydroxy acids), polyorthoesters (POE), polyaspirins, polyphosphazenes, collagen, hydrolyzed collagen, gelatin, hydrolyzed gelatin, fractions of hydrolyzed gelatin, elastin, starch, pre-gelatinized starch, hyaluronic acid, chitosan, alginate, albumin, fibrin, vitamin E analogs, such as alpha tocopheryl acetate, d-alpha tocopheryl succinate, D,L-lactide, or L-lactide, -caprolactone, dextrans, vinylpyrrolidone, polyvinyl alcohol (PVA), PVA-g-PLGA, PEGT-PBT copolymer (polyactive), methacrylates, poly (N-isopropylacrylamide), PEO-PPO-PEO (pluronics), PEO-PPO-PAA copolymers, PLGA-PEO-PLGA, PEG-PLG, PLA-PLGA, poloxamer 407, PEG-PLGA-PEG triblock copolymers, POE, SAIB (sucrose acetate isobutyrate), polydioxanone, methylmethacrylate (MMA), MMA and N-vinylpyyrolidone, polyamide, oxycellulose, copolymer of glycolic acid and trimethylene carbonate, polyesteramides, tyrosine polyarylates, polyetheretherketone, polymethylmethacrylate, silicone, hyaluronic acid, chitosan, or combinations thereof. In one embodiment, substrate 22 comprises Glycoprene, which is sold by Poly-Med, Inc. As used herein, the term “glycoprene” or “Glycoprene” refers to Glycoprene® or Glycoprene Ile. Glycoprene® can refer to different variations of the material sold under the trade name Glycoprene®, such as, for example, Glycoprene® 6829, Glycoprene® 8609 and Glycoprene® 7027.
In some embodiments, the biocompatible non-biodegradable and/or non-bioresorbable material or materials may include polymeric and/or non-polymeric materials, such as, for example, polyurethane, polyester, polytetrafluoroethylene (PTFE), polyethylacrylate/polymethylmethacrylate, polylactide, polylactide-co-glycolide, polyamides, polydioxanone, polyvinyl chloride, polymeric or silicone rubber, collagen, thermoplastics, or combinations thereof.
In some embodiments, anchorage device 20 is configured to be permanently implanted within a body of a patient. In such embodiments, substrate 22 may include a biodegradable material and/or a bioresorbable material. For example, substrate 22 may be made entirely from a biodegradable material and/or a bioresorbable material such that substrate 22 is made only from the biodegradable material and/or bioresorbable material.
In some embodiments, substrate 22 is provided in the form of a sheet. In some embodiments, substrate 22 includes only one sheet, such as, for example, sheet 22a, and in other embodiments, substrate 22 includes at least one sheet, such as, for example, sheet 22b, in addition to sheet 22a, as shown in
In some embodiments, anchorage device 20 includes a coating, such as, for example, a first coating 24 that is applied directly to substrate 22 such that coating 24 covers all or a portion of substrate 22. In some embodiments, coating 24 includes a polymer and an API dispersed in the polymer such that the polymer releases the API as the polymer degrades. In some embodiments, the API of coating 24 can include one or more of the APIs discussed herein. In some embodiments, the API of coating 24 can include one or more antibiotics, such as, for example, rifampin and minocycline. In some embodiments, the API of coating 24 can include a mixture of rifampin and minocycline. In some embodiments, the API of coating 24 can include any of the APIs discussed herein in place of, or in addition to, a mixture of rifampin and minocycline. In some embodiments, the polymer of coating 24 can include one or more of the polymers discussed herein. In some embodiments, the polymer of coating 24 can include a tyrosine-derived polyarylate, such as, for example, one or more of the tyrosine-derived polyarylates discussed herein.
In some embodiments, anchorage device 20 includes a coating, such as, for example, second coating 26 that is applied directly to coating 24 such that coating 26 covers all or a portion of coating 24. In some embodiments, coating 26 includes a polymer and an active pharmaceutical ingredient (API) dispersed in the polymer of coating 26 such that the polymer of coating 26 releases the API of coating 26 as the polymer of coating 26 degrades. In some embodiments, the API of coating 26 can include a hemostatic agent, such as, for example, one or more of the hemostatic agents discussed herein. In some embodiments, the hemostatic agent is tranexamic acid. In some embodiments, the polymer of coating 26 can include one or more of the polymers discussed herein. In some embodiments, the polymer of coating 26 can include one or more alginates selected from the group consisting of calcium alginate and sodium alginate, as discussed herein. In some embodiments, the alginate of coating is Medium viscosity Sodium Alginate: 1000-2000 cps sodium alginate. It is noted that providing a coating that is made from a hemostatic agent, such as, for example, one or more alginates that is configured to release one or more other hemostatic agents, such as, for example, tranexamic acid and/or other hemostatic agent(s) provides a dual hemostatic effect designed to achieve hemostasis faster than devices that use only one type of hemostatic agent and hence provide only a single hemostatic effect.
In some embodiments, coating 24 is applied to substrate 22 such that coating 24 directly engages fibers, such as, for example, fibers F that form substrate 22 such that coating 24 extends 360 degrees about each of fibers F along at least a portion of a length of each of fibers F, as shown in
In some embodiments, coating 26 is spaced apart from substrate 22 by coating 24, as shown in
In some embodiments, wherein device 20 is in the form of a pocket or pouch having piece 22a joined with piece 22b as discussed herein, surface 34 of piece 22a faces surface 34 of piece 22b such that surfaces 34, 34 of pieces 22a, 22b define cavity C. This configuration may be desirable to allow coating 26 to come into contact with fluid upon implantation before coating 24 comes into contact with fluid to allow coating 26 to release tranexamic acid and/or other hemostatic agent(s) to promote blood clotting before coating 24 releases the antibiotics and/or other API(s) to prevent and/or treat infection.
In some embodiments, wherein device 20 is in the form of a pocket or pouch having piece 22a joined with piece 22b as discussed herein, surface 32 of piece 22a faces surface 32 of piece 22b such that surfaces 32, 32 of pieces 22a, 22b define cavity C. This configuration may be desirable to allow coating 24 and coating 26 to come into contact with fluid simultaneously upon implantation to allow coating 26 to release tranexamic acid and/or other hemostatic agent(s) to promote blood clotting at the same time or at approximately the same time as coating 24 releases the antibiotics and/or other API(s) to prevent and/or treat infection. In some embodiments, the polymers of coatings 24, 26 can be customized with regard to the timing in which the polymers release the antibiotics and/or other API(s) and tranexamic acid and/or other hemostatic agent(s). For example, in some embodiments, the polymers may be customized such that the polymer of coating 26 releases the tranexamic acid and/or other hemostatic agent(s) before the polymer of coating 24 releases the antibiotics and/or other API(s) when coatings 24, 26 are exposed to fluid simultaneously. In some embodiments, the polymers may be customized such that the polymer of coating 26 releases the tranexamic acid and/or other hemostatic agent(s) after the polymer of coating 24 releases the antibiotics and/or other API(s) when coatings 26 are exposed to fluid simultaneously. In some embodiments, the polymers may be customized such that the polymer of coating 26 releases the tranexamic acid and/or other hemostatic agent(s) at the same time that the polymer of coating 24 releases the antibiotics and/or other API(s) when coatings 26 are exposed to fluid simultaneously.
In some embodiments, the duration of release of the active agents in coatings 24, 26 can be at least somewhat controlled by the polymers that are included in coating 24 and coating 26. For example, the polymer used in coating 26 can be configured to degrade at a faster rate than the polymer used in coating 24 such that tranexamic acid and/or other hemostatic agent(s) is released from coating 26 before rifampin and/or minocycline and/or other API(s) is/are released from coating 24, even if surfaces 32, 34 are both exposed to fluid, including the same amount of fluid.
In that coating 26 can release tranexamic acid and/or other hemostatic agent(s) to promote blood clotting, it may be desirable to release the tranexamic acid and/or other hemostatic agent(s) from coating 26 as soon as possible following the implantation of device 20. This will allow the tranexamic acid and/or other hemostatic agent(s) to act before the polymer of coating 24 degrades and releases rifampin and/or minocycline and/or other API(s). As such, in some embodiments, it may be desirable to provide coating 26 with a polymer that degrades over a few hours to a few days and to provide coating 24 with a polymer that degrades over multiple days or weeks. This will allow device 20 to release a substantial amount of tranexamic acid and/or other hemostatic agent(s) to initiate healing soon after implantation of device 20 and to release rifampin and/or minocycline and/or other API(s) during and after such healing to prevent infection, as shown in
In some embodiments, coating 24 is applied to substrate 22 such that coating 24 at least partially coats filaments or fibers of substrate 22, as shown in
In some embodiments, substrate 22 is biodegradable and/or bioresorbable and device 20 is configured to hold medical device 25 therein such that substrate 22 does not begin to degrade until coatings 24, 26 completely degrade such that device 20 can hold medical device 25 therein until all of the tranexamic acid and/or other hemostatic agent(s) and antibiotics and/or other API(s) are released from coatings 24, 26. In some embodiments, substrate 22 does not begin to degrade until coatings 24, 26 completely degrade because substrate 22 is not directly exposed to fluid until coatings 24, 26 completely degrade. In some embodiments, substrate 22 has a degradation rate that is slower than that of the polymers in coatings 24, 26 such that substrate 22 will degrade slower than coatings 24, 26 even when substrate 22 and coatings 24,26 are exposed to fluid at the same time. In some embodiments, substrate 22 is completely biodegradable or bioresorbable. That is, all of substrate 22 is biodegradable or bioresorbable. In some embodiments, substrate 22 is completely non-biodegradable and/or non-bioresorbable. That is no portion of substrate 22 is biodegradable or bioresorbable.
Coating 26 includes an active agent, such as, for example, a hemostatic agent that can promote hemostasis, as discussed herein. One such hemostatic agent is tranexamic acid. However, it is envisioned that coating 26 can include one or more hemostatic agents in addition to or in place of tranexamic acid, such as, for example, epinephrine, collagen, chitosan and oxidized regenerated cellulose. In some embodiments, the collagen can include acid soluble collagen, pepsin soluble collagen, gelatin, cross-linkable collagen, or fibrillar collagen. In some embodiments, coating 26 can include one or more hemostatic agents in addition to or in place of tranexamic acid, such as, for example, one or more of Spongostan®, Surgifoam®, Avitene, thrombin and Ostene® in addition to or in place of the hemostatic agents discussed above. In some embodiments, coating 26 can include one or more hemostatic agents in addition to or in place of tranexamic acid, such as, for example, one or more of protamine, norepinephrine, desmopressin, lysine analogs, gelatin, polysaccharide spheres, mineral zeolite, bovine thrombin, pooled human thrombin, recombinant thrombin, gelatin and thrombin, collagen and thrombin, cyanacrylate, fibrin glue, polyethylene glycol, and glutaraldehyde in addition to or in place of the hemostatic agents discussed above. In some embodiments, coating 26 can include one or more hemostatic agents in addition to or in place of tranexamic acid, such as, for example, a mixture or combination of the hemostatic agents discussed herein. In some embodiments, the lysine analog is tranexamic acid.
In some embodiments, the API of coating 24 can include one or a combination of active pharmaceutical ingredients, such as, for example, anesthetics, antibiotics, anti-inflammatory agents, procoagulant agents, fibrosis-inhibiting agents, anti-scarring agents, antiseptics, leukotriene inhibitors/antagonists, cell growth inhibitors and mixtures thereof. In some embodiments, the API of coating 24 includes one or more antibiotic. In some embodiments, the antibiotic is selected from the group consisting of rifampin and minocycline and mixtures thereof.
Examples of non-steroidal anti-inflammatories include, but are not limited to, naproxen, ketoprofen, ibuprofen as well as diclofenac; celecoxib; sulindac; diflunisal; piroxicam; indomethacin; etodolac; meloxicam; r-flurbiprofen; mefenamic; nabumetone; tolmetin, and sodium salts of each of the foregoing; ketorolac bromethamine; ketorolac bromethamine tromethamine; choline magnesium trisalicylate; rofecoxib; valdecoxib; lumiracoxib; etoricoxib; aspirin; salicylic acid and its sodium salt; salicylate esters of alpha, beta, gamma-tocopherols and tocotrienols (and all their d, 1, and racemic isomers); and the methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, t-butyl, esters of acetylsalicylic acid.
Examples of anesthetics include, but are not limited to, licodaine, bupivacaine, and mepivacaine. Further examples of analgesics, anesthetics and narcotics include, but are not limited to acetaminophen, clonidine, benzodiazepine, the benzodiazepine antagonist flumazenil, lidocaine, tramadol, carbamazepine, meperidine, zaleplon, trimipramine maleate, buprenorphine, nalbuphine, pentazocain, fentanyl, propoxyphene, hydromorphone, methadone, morphine, levorphanol, and hydrocodone. Local anesthetics have weak antibacterial properties and can play a dual role in the prevention of acute pain and infection.
Examples of antibacterial agents or antimicrobials include, but are not limited to, triclosan, chlorohexidine and other cationic biguanides, rifampin, minocycline (or other tetracycline derivatives), vancomycin, gentamycin; gendine; genlenol; genfoctol; clofoctol; cephalosporins and the like. Further antibacterial agents or antimicrobials include aztreonam; cefotetan and its disodium salt; loracarbef; cefoxitin and its sodium salt; cefazolin and its sodium salt; cefaclor; ceftibuten and its sodium salt; ceftizoxime; ceftizoxime sodium salt; cefoperazone and its sodium salt; cefuroxime and its sodium salt; cefuroxime axetil; cefprozil; ceftazidime; cefotaxime and its sodium salt; cefadroxil; ceftazidime and its sodium salt; cephalexin; hexachlorophene; cefamandole nafate; cefepime and its hydrochloride, sulfate, and phosphate salt; cefdinir and its sodium salt; ceftriaxone and its sodium salt; cefixime and its sodium salt; cetylpyridinium chloride; ofoxacin; linexolid; temafloxacin; fleroxacin; enoxacin; gemifloxacin; lomefloxacin; astreonam; tosufloxacin; clinafloxacin; cefpodoxime proxetil; chloroxylenol; methylene chloride, iodine and iodophores (povidone-iodine); nitrofurazone; meropenem and its sodium salt; imipenem and its sodium salt; cilastatin and its sodium salt; azithromycin; clarithromycin; dirithromycin; erythromycin and hydrochloride, sulfate, or phosphate salts ethylsuccinate, and stearate forms thereof, clindamycin; clindamycin hydrochloride, sulfate, or phosphate salt; lincomycin and hydrochloride, sulfate, or phosphate salt thereof, tobramycin and its hydrochloride, sulfate, or phosphate salt; streptomycin and its hydrochloride, sulfate, or phosphate salt; vancomycin and its hydrochloride, sulfate, or phosphate salt; neomycin and its hydrochloride, sulfate, or phosphate salt; acetyl sulfisoxazole; colistimethate and its sodium salt; quinupristin; dalfopristin; amoxicillin; ampicillin and its sodium salt; clavulanic acid and its sodium or potassium salt; penicillin G; penicillin G benzathine, or procaine salt; penicillin G sodium or potassium salt; carbenicillin and its disodium or indanyl disodium salt; piperacillin and its sodium salt; α-terpineol; thymol; taurinamides; nitrofurantoin; silver-sulfadiazine; hexetidine; methenamine; aldehydes; azylic acid; silver; benzyl peroxide; alcohols; carboxylic acids; salts; nafcillin; ticarcillin and its disodium salt; sulbactam and its sodium salt; methylisothiazolone, moxifloxacin; amifloxacin; pefloxacin; nystatin; carbepenems; lipoic acids and its derivatives; beta-lactams antibiotics; monobactams; aminoglycosides; microlides; lincosamides; glycopeptides; tetracyclines; chloramphenicol; quinolones; fucidines; sulfonamides; macrolides; ciprofloxacin; ofloxacin; levofloxacins; teicoplanin; mupirocin; norfloxacin; sparfloxacin; ketolides; polyenes; azoles; penicillins; echinocandines; nalidixic acid; rifamycins; oxalines; streptogramins; lipopeptides; gatifloxacin; trovafloxacin mesylate; alatrofloxacin mesylate; trimethoprims; sulfamethoxazole; demeclocycline and its hydrochloride, sulfate, or phosphate salt; doxycycline and its hydrochloride, sulfate, or phosphate salt; minocycline and its hydrochloride, sulfate, or phosphate salt; tetracycline and its hydrochloride, sulfate, or phosphate salt; oxytetracycline and its hydrochloride, sulfate, or phosphate salt; chlortetracycline and its hydrochloride, sulfate, or phosphate salt; metronidazole; dapsone; atovaquone; rifabutin; linezolide; polymyxin B and its hydrochloride, sulfate, or phosphate salt; sulfacetamide and its sodium salt; and clarithromycin (and combinations thereof). In some embodiments the polymer may contain rifampin and another antimicrobial agent, such as, for example, an antimicrobial agent that is a tetracycline derivative. In some embodiments, the polymer contains a cephalosporin and another antimicrobial agent. In some embodiments, the polymer contains combinations including rifampin and minocycline, rifampin and gentamycin, and rifampin and minocycline.
When a mixture of two antibiotics is used, they generally present in a ratio ranging from about 10:1 to about 1:10. In some embodiments, a mixture of rifampin and minocycline are used. In those embodiments, a ratio of rifampin to minocycline ranges from about 5:2 to about 2:5. In other embodiments, the ratio of rifampin to minocycline is about 1:1.
Examples of antifungals include amphotericin B; pyrimethamine; flucytosine; caspofungin acetate; fluconazole; griseofulvin; terbinafine and its hydrochloride, sulfate, or phosphate salt; amorolfine; triazoles (Voriconazole); flutrimazole; cilofungin; LY303366 (echinocandines); pneumocandin; imidazoles; omoconazole; terconazole; fluconazole; amphotericin B, nystatin, natamycin, liposomal amptericin B, liposomal nystatins; griseofulvin; BF-796; MTCH 24; BTG-137586; RMP-7/Amphotericin B; pradimicins; benanomicin; ambisome; ABLC; ABCD; Nikkomycin Z; flucytosine; SCH 56592; ER30346; UK 9746; UK 9751; T 8581; LY121019; ketoconazole; micronazole; clotrimazole; econazole; ciclopirox; naftifine; and itraconazole.
In some embodiments, active pharmaceutical ingredient (API) of coating 24 includes keflex, acyclovir, cephradine, malphalen, procaine, ephedrine, adriamycin, daunomycin, plumbagin, atropine, quinine, digoxin, quinidine, biologically active peptides, cephradine, cephalothin, cis-hydroxy-L-proline, melphalan, penicillin V, aspirin, nicotinic acid, chemodeoxycholic acid, chlorambucil, paclitaxel, sirolimus, cyclosporins, 5-fluorouracil and the like.
In some embodiments, the API of coating 24 includes one or more ingredients that act as angiogenensis inhibitors or inhibit cell growth such as epidermal growth factor, PDGF, VEGF, FGF (fibroblast growth factor) and the like. These ingredients include anti-growth factor antibodies (neutrophilin-1), growth factor receptor-specific inhibitors such as endostatin and thalidomide. Examples of useful proteins include cell growth inhibitors such as epidermal growth factor.
Examples of anti-inflammatory compounds include, but are not limited to, anecortive acetate; tetrahydrocortisol, 4,9(11)-pregnadien-17α, 21-diol-3,20-dione and its −21-acetate salt; 111-epicortisol; 17α-hydroxyprogesterone; tetrahydrocortexolone; cortisona; cortisone acetate; hydrocortisone; hydrocortisone acetate; fludrocortisone; fludrocortisone acetate; fludrocortisone phosphate; prednisone; prednisolone; prednisolone sodium phosphate; methylprednisolone; methylprednisolone acetate; methylprednisolone, sodium succinate; triamcinolone; triamcinolone-16,21-diacetate; triamcinolone acetonide and its −21-acetate, −21-disodium phosphate, and −21-hemisuccinate forms; triamcinolone benetonide; triamcinolone hexacetonide; fluocinolone and fluocinolone acetate; dexamethasone and its −21-acetate, −21-(3,3-dimethylbutyrate), −21-phosphate disodium salt, −21-diethylaminoacetate, −21-isonicotinate, −21-dipropionate, and −21-palmitate forms; betamethasone and its −21-acetate, −21-adamantoate, −17-benzoate, −17,21-dipropionate, −17-valerate, and −21-phosphate disodium salts; beclomethasone; beclomethasone dipropionate; diflorasone; diflorasone diacetate; mometasone furoate; and acetazolamide.
Examples of leukotriene inhibitors/antagonists include, but are not limited to, leukotriene receptor antagonists such as acitazanolast, iralukast, montelukast, pranlukast, verlukast, zafirlukast, and zileuton.
In some embodiments, active pharmaceutical ingredient (API) of coating 24 includes sodium 2-mercaptoethane sulfonate (“MESNA”). MESNA has been shown to diminish myofibroblast formation in animal studies of capsular contracture with breast implants [Ajmal et al. (2003) Plast. Reconstr. Surg. 112:1455-1461] and may thus act as an anti-fibrosis agent.
Procoagulants include, but are not limited to, zeolites, thrombin, and coagulation factor concentrates.
In some embodiments, the amount of the API of coating 24 that is applied to substrate 22 via coating 24 or otherwise ranges between about 0.3 to about 2.8 micrograms/cm2. In other embodiments, the amount of the API of coating 24 that is applied to substrate 22 via coating 24 or otherwise ranges between about 0.6 to about 1.4 micrograms/cm2. In yet other embodiments, the amount of the API of coating 24 that is applied to substrate 22 via coating 24 or otherwise ranges between about 0.85 to about 1.20 micrograms/cm2. In yet further embodiments, the amount of the API of coating 24 that is applied to substrate 22 via coating 24 or otherwise ranges between about 0.90 to about 1.10 micrograms/cm2. In yet further embodiments, the amount of the API of coating 24 that is applied to substrate 22 via coating 24 or otherwise ranges between about 50 to about 150 micrograms/cm2. In yet further embodiments, the amount of the API of coating 24 that is applied to substrate 22 via coating 24 or otherwise ranges between about 62 to about 140 micrograms/cm2. In yet further embodiments, 62 micrograms/cm2 of the API of coating 24 is applied to substrate 22 via coating 24 or otherwise. In yet further embodiments, 140 micrograms/cm2 of the API of coating 24 is applied to substrate 22 via coating 24 or otherwise.
In some embodiments, the amount of the tranexamic acid and/or other hemostatic agent(s) that is applied to substrate 22 via coating 26 or otherwise ranges between about 0.3 to about 2.8 micrograms/cm2. In other embodiments, the amount of tranexamic acid and/or other hemostatic agent(s) that is applied to substrate 22 via coating 26 or otherwise ranges between about 0.6 to about 1.4 micrograms/cm2. In yet other embodiments, the amount of tranexamic acid and/or other hemostatic agent(s) that is applied to substrate 22 via coating 26 or otherwise ranges between about 0.85 to about 1.20 micrograms/cm2. In yet further embodiments, the amount of tranexamic acid and/or other hemostatic agent(s) that is applied to substrate 22 via coating 26 or otherwise ranges between about 0.90 to about 1.10 micrograms/cm2. In yet further embodiments, the amount of tranexamic acid and/or other hemostatic agent(s) that is applied to substrate 22 via coating 26 or otherwise ranges between about 50 to about 150 micrograms/cm2. In yet further embodiments, the amount of tranexamic acid and/or other hemostatic agent(s) that is applied to substrate 22 via coating 24 or otherwise ranges between about 62 to about 140 micrograms/cm2. In yet further embodiments, 62 micrograms/cm2 of tranexamic acid and/or other hemostatic agent(s) that are applied to substrate 22 via coating 26 or otherwise. In yet further embodiments, 140 micrograms/cm2 of tranexamic acid and/or other hemostatic agent(s) is applied to substrate 22 via coating 26 or otherwise.
In other embodiments, the API of coating 24 includes rifampin and minocycline and the amount of each of rifampin and minocycline that is applied to substrate 22 via coating 24 ranges between about 0.6 to about 1.4 micrograms/cm2. In yet other embodiments, the amount of each of rifampin and minocycline that is applied to substrate 22 via coating 24 ranges between about 0.85 to about 1.20 micrograms/cm2. In yet further embodiments, the amount of each of rifampin and minocycline that is applied to substrate 22 via coating 24 ranges between about 0.90 to about 1.10 micrograms/cm2.
The API of coating 24 may include one or more of the active pharmaceutical ingredients discussed herein. Doses of the APIs discussed herein are known and the amounts of any single API to include in anchorage device 20 can readily be surmised. Any pharmaceutically acceptable form of APIs discussed herein can be employed in anchorage device 20, e.g., the free base or a pharmaceutically acceptable salt or ester thereof. Pharmaceutically acceptable salts, for instance, include sulfate, lactate, acetate, stearate, hydrochloride, tartrate, maleate, citrate, phosphate and the like.
In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 is selected from the group consisting of polylactic acid, polyglycolic acid, polyp lactide), poly(D,L-lactide)polyglycolic acid[polyglycolide], poly(L-lactide-co-D,L-lactide), polyp lactide-co-glycolide), poly(D, L-lactide-co-glycolide), poly(glycolide-co-trimethylene carbonate), poly(D,L-lactide-co-caprolactone), poly(glycolide-co-caprolactone), polyethylene oxide, polydioxanone, polypropylene fumarate, poly(ethyl glutamate-co-glutamic acid), poly(tert-butyloxy-carbonylmethyl glutamate), polycaprolactone, polycaprolactone co-butylacrylate, polyhydroxybutyrate, copolymers of polyhydroxybutyrate, poly(phosphazene), poly(phosphate ester), poly(amino acid), polydepsipeptides, maleic anhydride copolymers, polyiminocarbonates, poly[(97.5% dimethyl-trimethylene carbonate)-co-(2.5% trimethylene carbonate)], poly(orthoesters), tyrosine-derived polyarylates, tyrosine-derived polycarbonates, tyrosine-derived polyiminocarbonates, tyrosine-derived polyphosphonates, polyethylene oxide, polyethylene glycol, polyalkylene oxides, hydroxypropylmethylcellulose, polysaccharides such as hyaluronic acid, chitosan and regenerate cellulose. In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 may include combinations, blends or mixtures of the polymers discussed herein.
In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 is a polyarylate. In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 is a tyrosine-derived polyarylate. In some embodiments, the tyrosine-derived polyarylate is p(DTE co X % DT succinate), where X is about 10% to about 30%. In some embodiments, the tyrosine-derived polyarylate is p(DTE co X % DT succinate), where X ranges from about 26.5% to about 28.5%. In some embodiments, the tyrosine-derived polyarylate is p(DTE co X % DT succinate), where X is about 27.5%. In some embodiments, the polymer is P22-27.5 DT.
As used herein, DTE is the diphenol monomer desaminotyrosyl-tyrosine ethyl ester; DTBn is the diphenol monomer desaminotyrosyl-tyrosine benzyl ester; DT is the corresponding free acid form, namely desaminotyrosyl-tyrosine. BTE is the diphenol monomer 4-hydroxy benzoic acid-tyrosyl ethyl ester; BT is the corresponding free acid form, namely 4-hydroxy benzoic acid-tyrosine.
P22-XX is a polyarylate copolymer produced by condensation of DTE and DTBn with succinic acid followed by removal of benzyl group. P22-10, P22-15, P22-20, P22-XX, etc., represents copolymers different percentage of DT (i.e., 10, 15, 20 and % DT, etc.) In some embodiments, the polymer is produced by condensation of DTBn with succinic acid followed by removal of benzyl group. This polymer is represented as P02-100.
In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 includes one or more polyarylates that are copolymers of desaminotyrosyl-tyrosine (DT) and an desaminotyrosyl-tyrosyl ester (DT ester), wherein the copolymer comprises from about 0.001% DT to about 80% DT and the ester moiety can be a branched or unbranched alkyl, alkylaryl, or alkylene ether group having up to 18 carbon atoms, any group of which can, optionally have a polyalkylene oxide therein. Similarly, another group of polyarylates are the same as the foregoing but the desaminotyrosyl moiety is replaced by a 4-hydroxybenzoyl moiety. In some embodiments, the DT or BT contents include those copolymers with from about 1% to about 30%, from about 5% to about 30% from about 10% to about 30% DT or BT. In some embodiments, the diacids (used informing the polyarylates) include succinate, glutarate and glycolic acid.
In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 includes one or more biodegradable, resorbable polyarylates and polycarbonates. These polymers, include, but are not limited to, BTE glutarate, DTM glutarate, DT propylamide glutarate, DT glycineamide glutarate, BTE succinate, BTM succinate, BTE succinate PEG, BTM succinate PEG, DTM succinate PEG, DTM succinate, DT N-hydroxysuccinimide succinate, DT glucosamine succinate, DT glucosamine glutarate, DT PEG ester succinate, DT PEG amide succinate, DT PEG ester glutarate, DT PEG ester succinate, DTMB P(Desaminotyrsoyl tyrosine methylparaben ester-glutarate), and DTPP P(Desaminotyrsoyl tyrosine propylparaben ester-glutarate).
In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 is one more polymers from the DTE-DT succinate family of polymers, e.g., the P22-xx family of polymers having from 0-50%, 5-50%, 5-40%, 1-30% or 10-30% DT, including but not limited to, about 1, 2, 5, 10, 15, 20, 25, 27.5, 30, 35, 40%, 45% and 50% DT. In some embodiments, the polymer is P22-27.5 DT.
In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 has diphenol monomer units that are copolymerized with an appropriate chemical moiety to form a polyarylate, a polycarbonate, a polyiminocarbonate, a polyphosphonate or any other polymer.
In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 is tyrosine-based polyarylate. In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 includes blends and copolymers with polyalkylene oxides, including polyethylene glycol (PEG).
In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 can have from 0.1-99.9% PEG diacid to promote the degradation process. In some embodiments, the polymer of coating 24 and/or the polymer of coating 26 includes blends of polyarylates or other biodegradable polymers with polyarylates.
In some embodiments, shown in
In some embodiments, first and second pieces 22a, 22b are portions of a single sheet that is bent to produce a fold at one end of the pocket or envelope. First and second pieces 22a, 22b are joined along sides of the pocket or envelope that extend transverse to the fold such that the fold and the sides of the pocket or envelope do not have any openings. First and second pieces 22a, 22b are not joined at an end of the pocket or envelope opposite the fold to define an opening at the end such that medical device 25 can be inserted through the opening and into a cavity defined by inner surfaces of first and second pieces 22a, 22b.
In some embodiments, first and second pieces 22a, 22b each include a mesh. In some embodiments, first piece 22a includes a mesh including pores having a first size and second piece 22b includes a mesh including pores having a second size, wherein the first size is different than the second size. In some embodiments, the first size is greater than the second size. In some embodiments, the first size is less than the second size. In some embodiments, first and second pieces 22a, 22b each include a thin walled structure that does not have any pores or apertures. In some embodiments one of first and second pieces 22a, 22b includes a mesh and the other one of first and second pieces 22a, 22b includes a thin walled structure that does not have any pores or apertures.
In some embodiments, first and second pieces 22a, 22b are formed from the same material. In some embodiments one of first and second pieces 22a, 22b is formed from a first material, such as, for example, one or more of the materials discussed herein, and the other one of first and second pieces 22a, 22b is made from a second material, such as, for example, one or more of the materials discussed herein, wherein the second material is different than the first material. For example, first piece 22a may be formed from a biodegradable and/or bioresorbable material and second piece 22b may be formed from a non-biodegradable and/or non-bioresorbable material, or vice versa. In some embodiments, first and second pieces 22a, 22b are each formed from a biodegradable and/or bioresorbable material, wherein the biodegradable and/or bioresorbable materials degrade and/or resorb at the same rate. In some embodiments, first and second pieces 22a, 22b are formed from different biodegradable and/or bioresorbable materials, wherein one of the biodegradable and/or bioresorbable materials degrades and/or resorbs more quickly than the other biodegradable and/or bioresorbable material.
In some embodiments, rather include antibiotics and/or other API(s) in a separate coating, such as, for example, coating 24, anchorage device 20 includes a substrate 22 that is formed from a polymer wherein substrate 22 has antibiotics, such as, for example, the antibiotics included in coating 24 and/or other API(s) dispersed in the polymer that forms substrate 22 such that the polymer that forms substrate 22 releases the antibiotics and/or other API(s) as the polymer that forms substrate 22 degrades. Coating 26 then coats all or a portion of substrate 22, as shown in
In some embodiments, coating 26 incorporates at least one hemostatic agent, such as, for example, tranexamic acid into a polymer, such as, for example, one or more alginates, in a manner that overcomes the difficulties associated with such hemostatic agents, such as, for example, poor solubility and poor bioavailability. In one example, 2.0 g of glycerol, 3 g of alginate and 2 g of tranexamic acid are added to 300 mL of distilled water to form a mixture 36, as shown in
In operation and use, an anchorage device, such as, for example, anchorage device 20 and a medical device, such as, for example, medical device 25 are implanted into a body of a patient. The anchorage device releases active pharmaceutical ingredients, such as, for example, tranexamic acid and/or other hemostatic agents, to reduce or prevent bleeding within the patient or treat one of the conditions as discussed herein. In some embodiments, anchorage device 20 is implanted within the patient without medical device 25 and medical device 25 is coupled to or inserted into anchorage device 20 after anchorage device 20 is implanted. In some embodiments, medical device 25 is coupled to or inserted into anchorage device 20 before anchorage device 20 is implanted within the patient and anchorage device 20 and medical device 25 are implanted within the patient together.
In some embodiments, medical device 25 is removed from the patient after the treatment is completed. In some embodiments, anchorage device 20 remains implanted within the patient after medical device 25 is removed. In some embodiments, anchorage device 20 is removed from the patient after medical device 25 is removed. To remove anchorage device 20, tissue that is ingrown within substrate 22 of anchorage device 20 can be cut or otherwise detached from substrate 22. In some embodiments, a portion of anchorage device 20 may not be removable from the tissue and will remain implanted within the patient.
In some embodiments, kits are provided that include one or a plurality of anchorage devices, such as, for example, anchorage devices 20. It is contemplated that each of the anchorage devices included can have a different configuration. In some embodiments, the anchorage devices can include different coatings 24 and/or different coatings 26. In some embodiments, the anchorage devices can include different sizes. In some embodiments, the anchorage devices can include different shapes. In some embodiments, the anchorage devices can include different anchorage devices that are designed for use with different medical devices, such as, for example, the implantable or non-implantable medical devices discussed herein. In some embodiments, the kits include one or a plurality of medical devices, such as, for example, the implantable or non-implantable medical devices discussed herein. In some embodiments, the kit includes instructions for use. In some embodiments, the kit includes items that are used to make the anchorage devices, such as, for example, the materials used to make the substrate, the hemostatic agent(s), the active pharmaceutical ingredient(s), a computer with a processor capable of receiving data and communicating with a 3D printer to create an anchorage device having the parameters that were input into the computer (e.g., size, shape, material, agents/ingredients on selected areas of the substrate in selected amounts) and a 3D printer capable of making the anchorage device based upon data that is input into the computer regarding the parameters of the implant.
It will be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be construed as limiting, but merely as exemplification of the various embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto.
