The present invention relates generally to packaging for bidirectional sutures.
Sutures typically consist of a filamentous suture thread attached to a needle with a sharp point (attachment of sutures and surgical needles is described in U.S. Pat. Nos. 3,981,307, 5,084,063, 5,102,418, 5,123,911, 5,500,991, 5,722,99.1, 6,012,216, and 6,163,948, and U.S. Patent Application Publication No. 2004/0088003). Self-retaining sutures (often referred to as “barbed sutures”) differ from conventional sutures in that they possess numerous tiny retainers (often referred to as “barbs”) which anchor into the surrounding tissue following deployment, thereby eliminating the need to tie knots to affix adjacent tissues together, and have been described in, for example, U.S. Pat. No. 6,848,152 and European Patent 1 075 843. A self-retaining suture may be unidirectional, having one or more retainers oriented in one direction along the length of the suture thread; or bidirectional, typically having one or more retainers oriented in one direction along a portion of the thread, followed by one or more retainers oriented in another (often opposite) direction over the remainder of the thread (as described in the context of barbed retainers in U.S. Pat. Nos. 5,931,855 and 6,241,747). Although any number of sequential or intermittent configurations of retainers are possible, the most common form involves a needle at one end, followed by barbs projecting “away” from the needle until the transition point (often the midpoint) of the suture is reached; at the transition point the con figuration of barbs reverses itself 180° (i.e., the barbs are now facing in the opposite direction) along the remaining length of the suture thread before attaching to a second needle at the opposite end. The disclosures of all patents and patent applications mentioned herein are incorporated by reference.
In most suture packages, at least one end of the suture or, in the case of armed
sutures (that is, those having a needle pre-loaded to at least one end of the suture), the needle, is often separated from the suture material to facilitate grasping that end of the suture or the needle (often with a surgical instrument such as a needle driver), whichever the case may be. Similarly, some suture packages separate each end of the armed or unarmed suture, thus facilitating grasping of each end or grasping the needle attached to each end. Most package designs feature a single housing where the suture material is contained; often coiled together or wound into an oval or “FIG. 8” conformation: see, for example, the suture package described in U.S. Pat. No. 5,121,836. Such designs are suboptimal for a bidirectional self-retaining suture for several reasons. First and foremost, the orientation of the retainers makes it likely that retainers oriented in one direction will interlock or “catch” those oriented in another direction if both sets are contained in the same housing. When pulling the suture from the package (typically by pulling on the needle with a needle driver) this will cause the suture baits to grab or become stuck; often causing the suture to become entangled with itself. Second, even if the suture is successfully removed from the package, the same problem can still occur in the operating field. Since the suture material often has “memory” it: may often coil even after removal from the packaging. Once again, the barbs of differing orientations can become entwined and locked together, slowing suturing or creating tangles that are problematic for the surgeon.
Other package designs directed to minimizing or eliminating points at which the packaged suture may intersect with itself include a molded spiral suture package described in U.S. Pat. No. 5,154,283, a folded suture package described in U.S. Pat. No. 6,659,270 comprising a series of subpanels superimposed upon one another, and various designs having series of perforations, tabs, or other guide elements for holding the suture in a particular configuration in the package: see, for example, U.S. Pat. Nos. 6,938,755, 6,739,450, and U.S. Patent Application Publication No. 2004/0050721. Whether or not any of these types of packaging are actually suited to reducing tangling of self-retaining sutures, they may entail increased manufacturing materials requirements and increased design complexity.
Suture packages may be configured to prevent or reduce catching or tangling of bidirectional sutures.
There is provided a package for releasably holding at least one suture with first and second segments, the package including a base having at least one surface and first and second suture holders for segregating the first and second segments, respectively, the first and second suture holders engaging the base. In one aspect, the suture holders are housings having at least one aperture for the suture or sutures to pass through. In another aspect, the suture holders are guides, including, for example, spools. In yet another aspect, the suture holders share at least one segregating wall having a passage through which a suture may extend from one suture holder to the other. In yet a further aspect, the suture holders may include combinations of guides, housings, and segregating walls.
There is also provided a package for releasably holding at least one suture with a first segment having a plurality of retainers disposed proximally to a first end, and a second segment having a plurality of retainers disposed proximally to a second end, the package including a base having at least one surface and first and second suture holders for segregating the first and second segments, respectively, the first and second suture holders engaging the base. In one aspect, the suture holders are housings having at least one aperture for the suture or sutures to pass through. In another aspect, the suture holders are guides, including for example spools. In yet another aspect, the suture holders share at least one segregating wall having a passage through which a suture may extend from one suture holder to the other. In yet a further aspect the suture holders may include combinations of guides, housings, and segregating walls.
There is also provided a suture dispenser including a self-retaining suture with an elongated suture body with a first segment having a plurality of retainers disposed proximally to a first end, and a second segment having a plurality of retainers disposed proximally to a second end; and a package having a base with at least one surface, a first suture holder releasably engaging the first segment and a second suture holder releasably engaging the second segment, the first and second suture holders engaging the base. In one aspect, the suture holders are housings having at least one aperture for the suture or sutures to pass through. In another aspect, the suture holders are guides, including for example spools. In yet another aspect, the suture holders share at least one segregating wall having a passage through which a suture may extend from one suture holder to the other. In yet a further aspect, the suture holders may include combinations of guides, housings, and segregating wails,
Each of the foregoing packages may further include a needle park disposed at or proximally to at least one of the first and second suture holders. Each of the foregoing packages may also include at least in part a composition having a biological agent. The composition may have at least one biological agent selected from the class of anti-proliferative agents, anti-angiogenic agents, anti-infective agents, fibrosis-inducing (pro-scarring and/or pro-healing) agents, anti-scarring (fibrosis-inhibiting and/or anti-adhesion) agents, lubricious agents, echogenic agents, radio-opaque agents (and/or agents that enhance visualization under X-ray, CT, MRI and/or PET scanning) anti-inflammatory agents, cell cycle inhibitors, radioactive isotopes, analgesics, anesthetic agents, and anti-microtubule agents.
a is a plan view of an embodiment of a compartmented suture package in the open position, according to the present invention,
b is a perspective view of an embodiment of a compartmented suture package in the open position, according to the present invention.
a is a perspective view of one side of another embodiment of a compartmented suture package, according to the present invention.
b is a perspective view of another side of the suture package of
a is a plan view of another embodiment of a spooled suture package, according to the present invention.
b is a perspective view of another side of the spooled package of
a is a perspective view of another embodiment of a spooled suture dispenser, according to the present invention.
b is another perspective of the spooled suture package of
c is a perspective view of another embodiment of a spooled suture dispenser, according to the present invention.
d and 14e are sectional views illustrating alternative groove shapes for the spooled suture dispenser of
f is a perspective view of another embodiment of a spooled suture dispenser, according to the present invention.
g is a perspective view of another embodiment of a spooled suture
dispenser, according to the present invention,
a and 16b are perspective views of the deployment of a bidirectional armed suture from an embodiment of a compartmented and spooled suture package, according to the present invention.
Prior to setting forth, the invention, it may be helpful to an understanding thereof to first set forth definitions of certain terms that are used hereinafter
“Suture package” (or “package” or “dispenser”) refers to a device for releasably holding at least one suture.
“Self-retaining system” refers to a self-retaining suture together with means for deploying the suture into tissue. Such deployment means includes, without limitation, suture needles and other deployment devices as well as sufficiently rigid and sharp ends on the suture itself to penetrate tissue.
“Self-retaining suture” (or “barbed suture”) refers to a suture that does not require a knot or a suture anchor at its end in order to maintain its position into which it is deployed during a surgical procedure. These may be monofilament sutures or braided sutures, and are positioned in tissue in two stages, namely deployment and affixation, and include at least one tissue retainer.
“Tissue retainer” (or simply “retainer” or “barb”) refers to a suture element having a retainer body projecting from the suture body and a retainer end adapted to penetrate tissue. Each retainer is adapted to resist movement of the suture in a direction other than the direction in which the suture is deployed into the tissue by the surgeon, by being oriented to substantially face the deployment direction. As the tissue-penetrating end of each retainer moving through tissue during deployment faces away from the deployment direction (the direction of the passage of the suture during deployment), the tissue retainers should not catch or grab tissue during tins phase. Once the self-retaining suture has been deployed, a force exerted in another direction, often substantially opposite to the deployment direction, to affix the suture in position causes retainers to be displaced from their deployment positions of resting substantially along the suture body and causes retainer ends to penetrate into the tissue resulting in tissue being caught between the retainer and the suture body.
“Suture thread” refers to the filament component of the suture, and, for sutures requiring needle deployment, does not include the needle.
“Suture deployment end” refers to an end of the suture to be deployed into tissue; one or both ends of the suture may be suture deployment ends. The suture deployment end may be attached to deployment means such as suture needles, or may be sufficiently sharp and rigid to penetrate tissue on its own.
“Armed suture” refers to a suture having a suture needle on at least one suture deployment end.
“Bidirectional suture” refers to a self-retaining suture having retainers oriented in one direction at one end and retainers oriented in the other direction at the other end. A bidirectional suture is typically armed at each end of the suture thread.
“Transition segment” refers to a retainer-free portion of a bidirectional suture located between a first set of retainers oriented in one direction and a second set of retainers oriented in another direction.
“Suture needle” (or simply “needle”) refers to a needle used to deploy sutures into tissue, which come in many different shapes, forms and compositions. There are two main types of needles, traumatic needles and atraumatic needles. Traumatic needles have holes or eyes which are supplied separate from the suture thread and are threaded on site. Atraumatic needles are eyeless and are attached to the suture at the factory by swaging whereby the suture material is deformed to a final shape to hold the suture and needle together. Most modem sutures are swaged atraumatic needles. Suture needles are described, for example, in U.S. Pat. Nos. 6,322381 and 6,214,030 (Mani, Inc., Japan), and 5,464,422 (W. L. Gore, Newark, DE); and 5,941,899, 5,425,746; 5,306,288 and 5,156,615 (US Surgical Corp., Norwalk, CT); and 5,312,422 (Linvaiec Corp., Largo, FL); and 7,063,716 (Tyco Healthcare, North Haven. CT). Other suturing needles are described, for example, in U.S. Pat. Nos. 6,129,741; 5,897,572; 5,676,675; and 5,693,072.
“Needle park” refers to a holder on which a needle of an armed suture is secured in the suture package.
The details of one or more embodiments are set forth in the description below. Other features, objects and advantages will be apparent from the description, the drawings, and the claims,
Referring first to
When used with bidirectional sutures, the suture packages described herein provide segregation of each plurality of retainers oriented in a given direction, thereby preventing tangling of the retainers and facilitating removal of a suture from the package for use. While the examples herein describe the use of these suture packages with armed bidirectional sutures, it is to be understood that they may also be used with bidirectional sutures without needles, unidirectional sutures with or without needles, as well as plain sutures with or without needles. Furthermore, the suture packages described herein are not limited to housing only single sutures or only a particular number of needles; they can be used with any number of sutures (as long as, of course, retainers oriented in opposing directions are not grouped together) and any number of needles, to the extent that the suture packages' size or other physical parameters allow. Similarly, while the self-retaining sutures shown in the present examples are generally barbed, it is to be understood that the herein-described suture packages can be used with retainers of any configuration (for example, without limitation, frusto-conical retainers as disclosed in European Patent 1 075 843 and barbed retainers as disclosed in U.S. Pat. No. 6,241,747).
The suture packages described herein generally include a base having at least one surface, and a configuration that segregates the two opposing retainer configurations from coming into contact with each other that in turn attaches to the base; this can include, without limitation, separate compartments for each retainer configuration or a spooling/dispensing mechanism that prevents the opposing retainers from contacting each other and becoming entangled. In one embodiment, the suture packages described herein generally include a base having at least one surface, and at least two suture holders for segregating portions of sutures from one another, the holders engaging the base. However, it is to be understood that the term “suture holder” can be used to designate an area of the suture package on which part of the suture is disposed but Sacking any particular retention elements such as housings or guides; that is, as long as the portions of the suture can be releasably maintained in segregation from one another., the areas of the suture package that each segregated portion occupies can properly be described as a “suture holder”. For instance, without limitation, a suture package as claimed herein can include only one housing (or compartment) as the single housing would be sufficient to segregate the two portions if only one portion were disposed within it. In a similar manner, a wall with some sort of aperture or discontinuity (to allow passage of the suture) disposed between the two portions to be segregated can achieve the same end, by effectively defining suture holders on either side of that wall.
As bidirectional sutures can be maintained in these suture packages so that tissue retainers facing in opposing directions are segregated from one another, a portion of suture having retainers facing in a particular direction can be disposed in one suture holder while a portion of suture having retainers facing in an opposing direction can be disposed in the other suture holder. Thus, the connecting portion of the suture between each of the two portions disposed in the suture holders would lie somewhere between the suture holders, and would therefore include the retainer-free transitional segment. The suture holders may be disposed on the same surface of the base such that the base spans from one holder to the other, or they may be disposed on different surfaces of the base. In either case, the suture may extend from one holder to the other anywhere on the base, above the base, or through the base. Similarly, where the base can be described as having a single surface (for example, without limitation, a spherical or egg-shaped base) such that the suture holders are by definition on the same surface of the base, the connecting portion of suture may continue along (or above) the surface of the base or may run at least in part through the base. The base is not limited to being a single piece, and may instead include one or more pieces connected together.
A. Housings
Referring now to
a and 4b depict a suture package 400 releasably securing suture 450, package 400 having housings 404 and 414 in the open position on base 402, While covers 408 and 418 along one edge of each such cover (thereby opening in a hinged fashion) with apertures 410 and 420 to allow extension of transitional segment 460 of suture 450 to rest along base 402 between the two housings, the portions of the base 402 covered by covers 408 and 418 are recessed into wells 406 and 416, respectively. These wells 406 and 416 provide a greater volume in the housings 404 and 414 for each of the suture segments 456 and 458 to rest and thus do not press the suture 450 into a flattened coded configuration, further reducing the likelihood of the suture retaining “memory” of its coiled configuration in the suture package 400 once the suture 450 is dispensed for deployment into tissue. As in the example shown in
While the two preceding examples describe separate covers for each housing in a two-housing suture package, suture packages having two housings may be provided with a single cover spanning both housings. With reference to
Referring now to
The exemplary suture package 700 of
It is to be understood that the arrangement of the segregated compartments in
It is also possible to have the segregated suture holders (which, in the examples described in this section, are housings or compartments) on alternate surfaces of the base. Referring now to
If it is desired to seal off the segregated portions (for example, in order to maintain sterility of those portions), the cover may be affixed to the base after the suture is arranged in the desired segregated configuration on the base, such that the only points that the base and covers are not in contact with one another are the points at which the middle portion of the suture extends out of the respective housings and, in some cases as discussed herein, at which the deployment ends of the suture come out of the respective housings. A cover may be attached to a base by methods as varied as applying adhesive to stick each cover to the base, sewing them together, heat sealing them together, providing a hinge along one or a portion of an edge of a cover, and so forth. The attachment may be continuous along the cover and base (except of course at the apertures through which a suture is to pass through), or discontinuous, with as many points of attachment as are desired or as few as are necessary to keep the cover on the base. As the cover and base may be made of any suitable materials, the minimum number of attachment points would depend on factors understood by those skilled in the art, such as the characteristics of the materials selected for the covers and base (including, without limitation, characteristics such as rigidity and resilience), the strength of each attachment point, the weight and/or bulk of the sutures being housed, and so forth. Likewise, the choice of materials and attachment method would depend on how the suture is to be removed from the housing; for example, if the cover is to be peeled off, then the attachment of the cover to the base might desirably be effected with a. sufficiently weak adhesive, or with sufficiently few points of heat-sealing. Alternatively, the choice of attachment may be less important if the cover or base is to be torn or cut in order to free a suture; If the cover or base is to be torn, then at least a sufficient portion of the cover or base should consist of a tearable material (such as paper), while if the cover or base is to be cut then at least a sufficient portion of the cover or base should consist of a material that can be cut through with a sharp object. Likewise, the choice of attachment is less important than the choice of housing material if some part of the housing is to be snapped off or otherwise broken to release a suture.
B. Guides
While the foregoing examples describe surrounding portions of a suture in order to segregate them, a suture holder may as well or instead be provided with a suture guide to segregate a portion of the suture. Guides may include without limitation spools (stationary or rotatable), reels, and winding elements around which the suture may be wound, arches or bridges under which the suture may pass in a coil, eccentric guide elements around which a suture can be wound (such that the guide elements act something like foci in an ellipse), one or more perforations in the base through which a suture may pass (thus using the base itself as a guide element; see, for example, U.S. patent application. Ser. No. 10/420,993, hereby incorporated by reference), and so forth.
With reference to
Referring now to
It is to be understood that the segregated compartments depicted in
Referring now to
Each plurality of retainers facing in a given direction on a bidirectional suture can be segregated in a suture package by wrapping the suture on a guide assembly and without allowing any overlap or intersection of the retainer pluralities, such that each end of the suture is dispensable from a separate location on the guide assembly. Referring now to
As shown in
As shown in
e shows an alternative configuration for helical grove 1433 of suture package 1430. As shown in
f shows a variation of suture package 1430. The guide assembly has a. cylindrical base (that is, a spool) 1432 and a pair of helical or spinal grooves (channel) 1431 and 1433 which run around the circumference of cylindrical base 1432 in a double helix relationship. The double helix formed allows for both arms of suture 1450 to be wound around the cylindrical housing while being segregated by the walls of the grooves 1433. Needles 1452 and 1454 at either end of suture 1450 may be removably engaged in needle parks 1436 and 1437, on the same cap 1434 of the spool. At transition region 1460, suture 1450 crosses over between groove 1431 and groove 1433 and doubles back on itself towards the upper cap 1434.
g shows another variation of suture package 1430. The guide assembly
has a cylindrical base (that is, a spool) 1432 and helical groove (channel) 1433 which runs around the circumference of cylindrical base 1432. Helical groove 1433 is deep enough to contain a suture. In the embodiment of
C. Combinations of Housing and Guide
As already discussed in examples herein, suture packages can also be provided with any combination of housing and guide disclosed herein. Referring for example to
A use of a bidirectional self-retaining suture 1650 dispensed from a double spool and housing suture package 1600 is depicted in
Similarly,
As described in the two preceding examples, the segment of a bidirectional suture having retainers in a single direction can be drawn progressively from a sterile package without affecting the segment of the suture having retainers in a substantially opposing configuration. The second segment can be accessed in a similar manner when required.
As well, it should be noted that sewing with bidirectional sutures typically involves pulling the suture through both sides of the wound at (or near) the middle of the wound to be closed until the retainers of the opposite configuration “grab” the tissue. While the foregoing examples disclose having only retainers of a single orientation in each suture holder, the use of the suture package could further facilitate clinical deployment by including a length of suture (several inches) of the opposite retainer configuration (i.e. the region closest to the transition segment) in the suture housing that contains the part of the suture that will be deployed into the wound first. This arrangement may allow a surgeon to have enough “slack” to completely close the first half of the wound using only suture deployed from the first housing of the package; the remaining suture from the second housing could then be released to close the second half of the wound. While this would slightly increase the chances of the different barb configurations “catching” (although the Incidence would still be much smaller than if the entire suture were contained in one housing), this problem could be alleviated by using a spooling (or winding) mechanism of suture storage that prevented the barbs from coming into direct contact (as described above). In this regard, it should be noted that while the suture packages disclosed herein may optimally prevent or reduce catching by maintaining only retainers of a single orientation in each suture holder, this is not the only way to use these packages with bidirectional sutures, and indeed while a plurality of retainers of a single orientation may be maintained in each holder, it is possible to have retainers of that orientation in the other holder or outside the holders altogether.
While manufacturing has been disclosed in greater detail in the foregoing examples, it is worth reiterating that these suture packages may be manufactured from any suitable materials and, depending on the configuration of the selected suture holders, may have sutures packaged into them during the manufacturing process or after the packages are manufactured. Some of these examples describe suture packages in which sutures are fully sealed and therefore can be maintained in sterility, but it is to be understood that any of the packages disclosed herein can be further enclosed in sealed containers which would facilitate maintaining sterility. Furthermore, these suture packages may be provided with compositions to facilitate dispensing of the sutures, to inhibit growth of bacteria, fungi, or other contaminants, or to be transferred on to the sutures themselves (such as compounds to promote healing and prevent undesirable effects such as scar formation, infection, pain, and so forth). This can be accomplished in a variety of manners, including for example: (a) by directly affixing to the desired surface(s) of the package a formulation (e.g., by either spraying the suture with a polymer/drug film, or by dipping the suture into a polymer/drug solution), (b) by coating the desired surface(s) of package with a substance such as a hydrogel which will in turn absorb the composition, or (c) manufacturing the package itself with a. composition. Such compositions may include without limitation anti-proliferative agents, anti-angiogenic agents, anti-infective agents, fibrosis-inducing (or “pro-healing”) agents, anti-scarring (or anti-adhesion) agents, lubricious agents, echogenic agents, radio-opaque agents (and/or agents that enhance visualization under X-ray, CT, MRI and/or PET scanning), anti-inflammatory agents, cell cycle inhibitors, radioactive isotopes, analgesics, anaesthetics and anti-microtubule agents. For example, without limitation, the surfaces of a package that may contact the suture may have a composition applied thereto prior to the packaging of the suture, so that when the suture is dispensed from the package the composition may contact and adhere to the suture. For suture packages having one or more housings, the interior surfaces of the housings may be so provided with the desired composition, while for those having guides the guides may be so provided with the desired composition. Similarly, any part of the package with which the suture comes into contact may be provided with the composition, such as surfaces of the base or, if a suture passes through the base, then the passage in the base. Alternatively, the suture package may include a composition-dispensing container through which the suture may be passed prior to deployment into tissue. The purpose of the suture may also determine the sort of composition that is applied to the suture package; for example, anti-proliferative coatings (drugs or radioactive isotopes) may be desired for packages for sutures used in closing tumour excision sites, packages containing self-retaining sutures for use in tissue repositioning procedures may be provided with fibrosing (agents that promote wound healing) coatings, and those having anti-scarring or anti-infective coatings may be used for wound closure sutures. Coatings may also include a plurality of compositions either together or on different portions of the suture, where the multiple compositions can be selected either for different purposes (such as combinations of analgesics, anti-infective and anti-scarring agents).
Although the present invention has been shown and described in detail with regard to only a few exemplary embodiments of the invention, it should be understood by those skilled in the art that it is not intended to limit the invention to the specific embodiments disclosed. Various modifications, omissions, and additions may be made to the disclosed embodiments without materially departing from the novel teachings and advantages of the invention, particularly in light of the foregoing teachings. Accordingly, it is intended to cover all such modifications, omissions, additions, and equivalents as may be included within the spirit and scope of the invention as defined by the following claims.
This application claims benefit to the following U.S. provisional application, which is incorporated herein by reference in its entirety: U.S. Provisional Application No. 60/940,625, filed May 29, 2007, entitled “SUTURE PACKAGING” (Attorney Docket No. ANGIO-01001US0).
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US08/64921 | 5/27/2008 | WO | 00 | 6/1/2010 |
Number | Date | Country | |
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60940625 | May 2007 | US |