Abstract: An osteotomy guide assembly for femoral neck osteotomy includes a saddle locator assembly and a saw guide attachment. The saddle locator assembly includes a barrel-shaped locating device that locates the saddle region of the proximal femur. The barrel further includes a transverse support bar extending from the barrel. The barrel is positioned over an intramedullary shaft which is temporarily positioned in and extends from the medullary canal of the femur. A saw guide is used in conjunction with the saddle locator assembly. The saw guide is attached to the support bar by a single locking means which provides for positional adjustment of the saw guide relative to the support bar in two directions, including adjustment in the anterior-posterior direction along the transverse support bar and axially along the femur via a post which extends from the saw guide.

Abstract: A surgical instrument to aid in maneuvering a slideable member along a rod or other base member. The instrument has a distal tip which straddles the slideable member to provide for longitudinal movement of the slideable member in either longitudinal direction. The instrument also allows downward force to be applied to the slideable member. The instrument also may be used to assist in introducing the slideable member into an opening of another device.

Abstract: A surgical rod pusher instrument for application of a force against a rod. The instrument has a distal tip which includes a plurality of rod locator recesses, each having a different directional orientation. The rod can be located in the desired recess for application of force against the rod. The plurality of recesses enables the user to apply force to the rod in multiple, selectable directions.

Abstract: A rasp tool comprises a handle and a cutter. The rasp tool carries a releasable locking assembly to couple the cutter to the handle. The releasable locking assembly is compactly arranged at the distal end of the handle and the mating proximal end of the cutter. The assembly includes a first interconnecting means for opposing longitudinal separation between the handle and the cutter, and a second interconnecting means for opposing lateral motion between the cutter and the handle. The releasable locking assembly provides an effective, simple to use, manually controllable means for attaching and detaching the cutter to the handle.

Abstract: An orthopaedic prosthesis for implantation with a bone cement composition, the prosthesis including a polymer coating and a textured surface underneath at least a portion of the polymer coating. The textured surface, which is visible to the eye without magnification, beneath the polymer coating enhances or increases the surface shear and tensile strength of the prosthesis.

Abstract: A mechanism and method for locking or securing a bearing insert to the base of a prosthetic implant. The prosthetic implant is for replacement of a portion of natural bone at a point of articulation. The implant includes a locking mechanism which enables the bearing insert to be removably secured to the base support. The locking mechanism includes a resilient locking clip which is predisposed on one side of either the bearing insert or the base support such that when the bearing insert and base support are assembled together, the clip extends between both the insert and the support to secure the two components together. To insert and/or remove the bearing insert from the support, the clip is caused to substantially fully recede into the component in which it is predisposed. The method of securing the insert to the base includes inserting a lip extending from one side of one of the components into a corresponding cavity in the other component.

Abstract: An acetabular cup inserting instrument comprises a first handle and a second handle extending therefrom. The second handle is selectively rotatable about the first handle and selectively lockable in a desired position with respect to the first handle.

Abstract: A prosthetic implant including a plurality of discrete grooves disposed in the proximal end of the implant stem. The grooves are each segments of curves generated from radii having a center of curvature offset from the implant stem in a generally lateral direction and toward the upper portion of the proximal end of the stem. The curve segments are preferably segments of concentric circles.

Abstract: This invention relates to a new control valve intended to be used to control the supply and exhaust of fluids to a dual tourniquet system. The tubes supplying and exhausting the tourniquets are of a flexible nature, and as such may be squeezed to stop the flow of fluids therethrough. The inventive valve includes cam members with camming projections formed thereon at various predetermined positions on the circumferences thereof. Simultaneous rotation of the cam members by a control knob results in sequential filling and emptying of the tourniquets in a predetermined sequence. The valve is especially useful in the practice of the Bier block procedure.

Abstract: A lavage/suction tip comprising an elongated barrel with a first pliable conical shield extending outwardly from the distal tip of the barrel and a second substantially rigid conical shield which is slidable upon the barrel. The lavage/suction tip is utilized to provide irrigating fluid to a surgical site while providing suction to remove fluids and debris away from the surgical site. The first shield helps to eliminate splashback of the fluid. The second shield may be positioned to surround the first shield to provide firm support about the first shield, yet with a flexible, pliable tip perimeter. Alternatively, the second shield may be secured on the tip spaced away from the first shield so that the pliable first shield is used alone and may be easily, manually formed to more closely match the tip of the first shield to the working area or surface of the surgical site.

Abstract: A bone screw comprising a shaft having a first set of leading threads and a second set of trailing threads spaced apart from the first set of threads by an unthreaded central portion. The second set of threads are carried externally on a sleeve having a smooth inner cylindrical surface such that the sleeve is slidable about the unthreaded shaft portion. A raised lip is provided about the trailing end of the shaft to retain the sleeve on the shaft.The first and second set of screw threads are like-handed, but preferably of different pitch, with the pitch of the first set of screw threads exceeding that of the second set of screw threads to effectively hold portions of a fractured bone in compressive engagement.Provision of the second set of threads on a slidable sleeve enables the main shaft to slide through the sleeve and back out of the bone, when absorption occurs such as when the invention is used to repair a femoral neck fracture.

Abstract: A chest drainage device is provided for draining fluid from a chest cavity. The drainage device has three chambers; a collection chamber, a liquid seal chamber, and a pressure regulating manometer chamber. The pressure regulating chamber includes a first column which has its upper end adapted to be open to communicate with the atmosphere, and a second column, which has a substantially larger cross-sectional area than the first column. A passage connects the bottom ends of the first and second columns to each other, so that the pressure regulating chamber is substantially U-shaped. In operation, air bubbles up through a body of liquid in the larger second column which produces a disturbing sound. The present invention provides a means for muffling this sound. The muffling means includes an elongated tube inside of and extending along the length of the first column of the pressure regulating chamber.

Abstract: A bone screw comprising a shaft having a first set of leading threads and a second set of trailing threads spaced apart from the first set of threads by an unthreaded central portion. The second set of threads are carried externally on a sleeve having a smooth inner cylindrical surface such that the sleeve is slidable about the unthreaded shaft portion. A raised lip is provided about the trailing end of the shaft to retain the sleeve on the shaft.The first and second set of screw threads are like-handed, but preferably of different pitch, with the pitch of the first set of screw threads exceeding that of the second set of screw threads to effectively hold portions of a fractured bone in compressive engagement.Provision of the second set of threads on a slidable sleeve enables the main shaft to slide through the sleeve and back out of the bone, when absorption occurs such as when the invention is used to repair a femoral neck fracture.