Veterinary interventions can be complicated by an inability to communicate the need for intervention to the patient. Most humans can be advised of the need and effect for a possibly uncomfortable intervention, but canine patients cannot be easily compelled to voluntarily endure discomfort. Canine procedures in particular often require forceful or sedated intervention, and may still leave the patient in discomfort.
An oxygen catheter for veterinary patients includes an integrated catheter, cannula or vessel having integrated lumens for both oxygen and anesthetic such as lidocaine. The oxygen lumen extends into the trachea of the veterinary patient, often a canine, for respiratory aid. The anesthetic lumen is integrated into the same catheter as the oxygen, and terminates prior to the oxygen lumen for administering an anesthetic such as lidocaine around the soft palate to ease discomfort of the inserted catheter. The integration of the respiratory and anesthetic vessels allows a lidocaine drip to accompany the catheterized oxygen supply to medicate the tracheal, pharynx and soft palate regions from the inserted catheter along the path of the oxygen lumen to ease patient discomfort and anxiety for effective respiratory treatment while avoiding more invasive and expensive measures.
Configurations herein are based, in part, on the observation that veterinary practitioners have a need for supplemental respiratory assistance for effective treatment of patients. Unfortunately, conventional approaches to veterinary medicine suffer from the shortcoming that bioethics and resource allocations differ for veterinary patients. Patient comfort and cost may be subject to different standards than human treatment. Accordingly, configurations herein substantially overcome the cost and comfort impediments of conventional veterinary care by providing an integrated respiratory catheter that provides both an oxygen lumen and anesthetic lumen that provide respiratory support while easing discomfort with a low cost device.
A full treatment package based on configurations herein includes a harness with interconnecting straps for engaging a canine head, and a plurality of integrated tubular vessels conjoined in a parallel arrangement or bundle and attached to a strap on the harness. Each tubular vessel of the plurality of tubular vessels has a distal end for patient insertion and a proximate end for receiving a fluidic source (oxygen or lidocaine). An attachment wing attaches to the tubular bundle downstream of the proximate end just prior to patient insertion, generally adjacent a nostril in a canine application. An inverted bend in the integrated catheter facilitates insertion and placement into a canine nasal passage. Once inserted, a plurality of fenestrations at the distal end of each of the plurality of vessels provide for fluid delivery into the canine nasal passage, while a respective fluidic engagement port at the proximate end of each of the tubular vessels receives the oxygen and lidocaine for administration through the vessels.
The foregoing and other objects, features and advantages of the invention will be apparent from the following description of particular embodiments of the invention, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
The description below presents an example configuration for an oxygen nasal catheter or cannula designed for canine patients that includes an additional chamber for the infusion of a local anesthetic (such as lidocaine) into the nasal cavity, a harness and suture wing to secure the cannula to the patient's face, and an integrated catheter connection adapter.
In the configurations discussed below, the catheter is defined by an integrated assembly of vessels appearing as a length of tubing or similar cannulated structure, meaning an elongated, flexible vessel for transporting oxygen or anesthesia. Each vessel in the integrated catheter has a lumen for fluid passage, generally closed except for a distal end where fenestrations or apertures provide delivery of the respective fluid along the segment defined by the fenestrations. Additional structural features and refinements are discussed below.
Veterinary medicine differs from human healthcare because a different regime of bioethics is recognized. Veterinary cost models do not exhibit the same standard of care and are more swayed by such cost factors. In conventional approaches, oxygen supplementation is primarily limited to those veterinary hospitals that can provide 24/7 care, usually in an intensive care unit (ICU). The current gold standard of oxygen supplementation is a climate-controlled enclosure that provides higher ambient oxygen levels—simply known as an oxygen cage. The primary benefit of the oxygen cage is the ability to deliver oxygen by non-invasive means. Unfortunately, oxygen cages are expensive and quite large. As a result, they are only found in large specialty and referral veterinary hospitals.
A conventional method of nasal oxygen delivery (for those patients that do not have access to an oxygen cage or simply cannot fit into one) is via a rubber catheter inserted into one or both nasal cavities (to the depth of the nasopharynx or trachea) and sutured to the patient's face, often on or near the sensitive nasal tissue, often imposing discomfort. The rubber catheter is then connected to oxygen tubing by a catheter adapter or arbitrary vessel connection.
The catheter 110′ has an inversion 121 or articulation for directing the integrated respiratory catheter 110 for nasal insertion. Inversion may occur either before or after patient nasal insertion, and occurs at a point for a proper depth of the distal end. The inversion should occur around the point of insertion so that the articulation and a small run of the catheter are outside the nostril, as the remaining portion towards the proximate end is adjacent to the jawline and skull of the canine patient. Variations on the degree and location of the articulation may occur based on an intended insertion depth based on patient anatomy.
At a proximate end 130, an oxygen source connection 132 is adapted to receive a respiratory oxygen source, typically from a nylon or flexible tube. The oxygen source connection 132 is configured to receive any suitable low to moderate pressure connection of respiratory air. A barbed fitting may be employed for frictionally engaging the source tubing with sufficient resistance to withstand any backpressure from a modest flow, typically around 5-10 liters/minute.
An anesthetic connection 134 engages the smaller diameter anesthetic lumen 112-2, and may be a needleless connector such as a Luer fitting, often employed for low pressure or drip fluid delivery.
An anesthetic administration segment 220 (
A length of the catheter 110 forms a transport segment 230 (
A supply segment 240, shown in
A multi-point attachment 140 has a slidable engagement 142 with the respiratory catheter 110, such that the slidable engagement is adapted for securement to a patient at a predetermined location on the respiratory catheter 110 based on a patient skeletal structure, typically the patient skull size and the location of a corresponding support strap or harness. The slidable engagement 142 may be a frictional, circumferential enclosure around the catheter 110, or may be a split, deformable pair of opposed flanking members biased around the circumference of the catheter 110. Slidable engagement allows the attachment 140 to be disposed along the catheter 110 to a suitable attachment position, discussed further below in
In the configuration of
In either construction, the respiratory catheter 110 is formed from a flexible outer wall, such that the flexible outer wall permits articulation to form the inversion 121 while avoiding an interrupting crease that impedes fluid flow. A nylon tubing structure may be employed for having a suitable rigidity and deformity.
In operation, the harness 250 supports the catheter 110 in a suitable position along the patient skull. The harness 250 provides a tethered engagement to the respiratory catheter 110 using a circumferential strap for patient cranial placement. Typically, the catheter is attached adjacent to the nostril entry point. Often this is a sutured connection, and conventional approaches employ a braid, trap or other tethered connection to a single suture point on the sensitive nasal exterior. This has the effect of focusing all the attachment force on one location, which can increase discomfort. In the claimed configuration, the respiratory catheter 110 has a multi point attachment at an intermediate portion of the respiratory catheter, on the proximate side of the articulation 121. The multi point attachment includes a plurality of binding locations defined by attachment apertures 144 of the attachment 140 for tethered securement of the integrated respiratory catheter 110 to the patient 510. The apertures 144 may engage sutures attached rearward of the nasal epidermal tissue 512, on a fur region. The use of multiple suture locations aids in dispersing any tension in the sutures, easing discomfort. The inserted catheter 110 passes from the nostril through the pharynx 514, past the soft palate region 516 for communication with the trachea 520.
While the system and methods defined herein have been particularly shown and described with references to embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.
This patent application claims the benefit under 35 U.S.C. § 119(e) of U.S. Provisional Patent App. No. 63/145,640, filed Feb. 4, 2021, entitled “RESPIRATION AID,” incorporated herein by reference in entirety.
Number | Date | Country | |
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63145640 | Feb 2021 | US |