Abstract: A two-component fluid dispenser which can accurately mix two liquids of varying viscosity and then precisely deliver the mixture formed in discrete amounts. The mixture of the two components is delivered from a single delivery tube in a manner such that none of the mixture remains within the delivery tube at the completion of each mixing and delivery cycle. In one form of the apparatus, the single delivery tube of the apparatus is operably coupled with conventional hypodermic syringes of various sizes so that different fluids can be mixed in different ratios.

Abstract: An improved surgical stapler having first and second pivotally interconnected structural members each including a handle portion and a jaw portion. The structural members are pivotally movable between a closed position wherein their jaw portions are in a closely spaced relationship to an open position wherein their jaw portions are spaced apart a substantial distance. A locking member is pivotally connected to one of the structural members for pivotal movement between a first position wherein the locking member is generally aligned with the structural member and a second position wherein the free end of the locking member is spaced apart from the outboard end of the structural member. When actuated, the locking member functions to forcefully move the structural members toward a closed position so that the tissue to be stapled can be securely clamped between the jaw portions of the instrument.

Abstract: A surgical stapler for use by a surgeon to place one or more rows of surgical staples in organs or tissue. The stapler is of a character having a supporting frame, a replaceable staple cartridge, an anvil, a mechanism for approximating the cartridge relative to the anvil, and a mechanism for firing the device so as to crimp the staples against the anvil. The device, while at all times permitting approximation of the cartridge relative to the anvil, provides a novel safety mechanism that clearly indicates to the surgeon that the staples have been fired from the staple cartridge and simultaneously disables the device until it is manually reset.

Abstract: A tissue retraction device for use in laparoscopic surgery which includes a plurality of thin, resiliently deformable, pre-stressed blades disposed in a stacked relationship within an outer sleeve. The blades are connected at their inboard ends to a support rod which is telescopically carried within the sleeve. The blades are pre-twisted about a strategically located pivot point so that once the inboard end of the device is positioned within the peritoneum, the rod can be urged forwardly causing the end portions of the blades to automatically fan out in a manner such that the full width of the blades can be pressed against the tissue.

Abstract: A tissue retraction device for use in laparoscopic surgery which includes a plurality of thin, resiliently deformable, pre-stressed blades disposed in a stacked relationship within an outer sleeve. The blades are connected at their inboard ends to a support rod which is telescopically carried within the sleeve. The blades are pre-twisted about a stratigically located pivot point so that once the inboard end of the device is positioned within the peritoneum, the rod can be urged forwardly causing the end portions of the blades to automatically fan out in a manner such that the full width of the blades can be pressed against the tissue.

Abstract: A fluid flow control device for controling the flow of fluid from one region of the body to be drained to another region. The device includes a rigid cartridge combined with an elastomeric valve element. The design of the cartridge and valve element are such that the cartridge incorporates a seat and when the valve element is properly positioned within the valve body by a novel positioning arrangement it has sufficient spring force to push against the seat, thus creating a seal. The valve element ensures uni-directional flow as well as creating a set resistance to that flow. The unit can be easily assembled without the use of adhesives and in one configuration, the valve can be "tuned" to a desired pressure as a final assembly step. Combining two of the basic valving assemblies in series with an elastomeric section therebetween results in a valve system which can actively pump fluid downstream by squeezing the central connecting section.

Abstract: A combination scalpel blade removal and storage apparatus having an easy to grip hourglass-shaped, disposable plastic housing which includes a strategically located safety shield that prevents accidental cuts during the blade insertion and removal process. The housing is provided with an internal, blade receiving channel which closely receives the blade and positively locates the tang portion of the handle within the housing. The blade stripping mechanism of the apparatus comprises an integrally formed, spring loaded lever arm disposed externally of the housing. Pressing the lever effortlessly deflects the heel of the blade away from the tang and over into a recessed stop, or pocket formed near the forward portion of the housing. Retraction of the handle with a straight line, continuous movement, while maintaining an inwardly directed force on the lever, smoothly strips the blade from the handle.

Abstract: A fluid flow control device for controlling the flow of fluid from one region of the body to be drained to another region. The device includes a rigid cartridge combined with an elastomeric valve element. The design of the cartridge and valve element are such that the cartridge incorporates a seat and when the valve element is properly positioned within the valve body by a novel positioning arrangement it has sufficient spring force to push against the seat, thus creating a seal. The valve element ensures uni-directional flow as well as creating a set resistance to that flow. The unit can be easily assembled without the use of adhesives and in one configuration, the valve can be "tuned" to a desired pressure as a final assembly step. Combining two of the basic valving assemblies in series with an elastomeric section therebetween results in a valve system which can actively pump fluid downstream by squeezing the central connecting section.

Abstract: A subcutaneous access site to aid in the delivery of chemotherapeutic or analgesic drugs to the blood stream or to any body cavity. The device embodies a specially supported septum which exhibits exceptional resealing characteristics. In this regard, the device includes a rigid inner ring adapted to create uniform circumferential compression on the septum member to enhance site resealing even when standard twelve degree beveled hypodermic syringe needles are used. Additionally, the device is uniquely configured to give immediate feedback to the caregiver if the needle misses the target, thereby minimizing accidental subcutaneous injections.