摘要:
A metal-encased passive radio-frequency transponder assembly includes a metal housing having an external surface and an opening accessing an interior space, the opening closeable with a metal cover to provide a solid metal encasement The interior space of the encasement is defined by the interior walls of the housing and cover. The solid metal encasement has a substantially uniform wall thickness between the interior wall surface adjacent which an antenna assembly is disposed and the opposing external surface of less than about 0.5 mm. A passive radio-frequency transponder device is received within the interior space of the housing. The passive transponder device has an iron core antenna assembly. The antenna assembly is disposed adjacent the interior wall surface of the interior space and oriented to maximally couple a radio-frequency signal present at the interior wall surface to an antenna of the antenna assembly.
摘要:
A metal-encased passive radio-frequency transponder assembly includes a metal housing having an external surface and an opening accessing an interior space, the opening closeable with a metal cover to provide a solid metal encasement. The interior space of the encasement is defined by the interior walls of the housing and cover. The solid metal encasement has a substantially uniform wall thickness between the interior wall surface adjacent which an antenna assembly is disposed and the opposing external surface of less than about 0.5 mm. A passive radio-frequency transponder device is received within the interior space of the housing. The passive transponder device has an iron core antenna assembly. The antenna assembly is disposed adjacent the interior wall surface of the interior space and oriented to maximally couple a radio-frequency signal present at the interior wall surface to an antenna of the antenna assembly.
摘要:
A flexible torque-transmitting coupling assembly and method is disclosed, as well as flexible surgical reamers having such assemblies. The reamers employ a fitting with radially flexible member, e.g., a split collet or a super-elastic collar that receives an elongated tubular shaft of super-elastic alloy. A compression sleeve is applied to the collet, in one embodiment, while the collar is located within a counter-bore of the fitting in another embodiment. Relative motion between the shaft, fitting and collet (or collar) induces a super-elastic activation in the shaft to form the desired coupling.
摘要:
A spine shaver designed with increased tissue removing efficiency is described. The shaver comprises a cylindrical shaver blade, an elongated body, and a pulley and belt drive mechanism. The shaver blade further comprises a tissue cutting surface that extends along the longitudinal axis of the shaver. The shaver is further designed with the shaver blade positioned perpendicularly to the elongated body. The increased surface area of the shaver blade and perpendicular blade orientation provide an efficient means of removing spinal tissue and debulking the area between two vertebrae.
摘要:
An orthopedic device is described for stabilizing the spinal column between first and second vertebral bodies. The device has first and second screws adapted for fixation to the first and second vertebral bodies, respectively. The device further includes an elongated ligament with a first end connected to the first screw and the second end operatively connected with the second screw. The ligament is made preferably of a nickel titanium alloy selected to have ductile inelastic properties at body temperature and is capable of plastic deformation to allow relative constrained motion between the vertebral bodies. The preferred nickel titanium has a martensite/austenite transition temperature above body temperature. In a preferred embodiment, the second pedicle screw includes a bearing for receiving the ligament in a slidably engageable relationship. The device further includes optional first and second dampening members surrounding the ligament for restraining the spinal column during flexion and extension.
摘要:
A self retained cover assembly for holding an electrical device in an electrical outlet. The cover includes a retaining body with a front face for covering the outlet and a rear face with two retainer prongs having moveable barbs for holding the cover to the outlet. The cover retains an electrical cord or an electronic device with electrically conductive prongs to the outlet. A tab is provided to move the barbs so the cover may be removed from the outlet.
摘要:
A safety device for electrical outlets includes a body having prongs rigidly attached to the body which can be inserted into the openings of a standard electrical outlet, wherein one or more of the prongs define a spring-biased portion defining a barb for engaging the rear surface of the outlet once the device is fully inserted therein.
摘要:
A modular prosthesis for replacing a portion of a bone having an articulating end includes a neck having a bore extending therethrough, a body having a bore extending therethrough, and an elongated stem. A proximal end of the stem is received within the bore of the body and the bore of the neck so that at least a self-locking taper connection or a press fit connection is formed between the stem and each of the neck and the body.
摘要:
According to the invention, a torque-transmitting assembly is described. A female coupling member defines a shape with a tapered bore. A radially flexible sleeve member has a wall with a tapered exterior surface, received within the bore, and an inner surface defining a through-bore. An elongated shaft member made of super-elastic alloy has an outer surface that is received within the through-bore. Relative motion among at least two of the members causes the inner surface to contact the outer surface, inducing a super-elastic activation in the shaft, simultaneously securing the members together in a fixed relative position. The radially flexible sleeve member has a plurality of collet fingers, which preferably contact the shaft at discrete locations. It is further preferred that the super-elastic activation in the shaft occurs as a result of the discrete contact thereby changing the cross-sectional shape of the shaft, which is generally non-circular, e.g., polygonal, in a further preferred form. A surgical device, e.g., a flexible reamer, is descibed as incorporating the present assembly.
摘要:
Improved surgical instruments are provided including improved suture passers, improved drill guides for forming holes in bones adjacent a joint at locations referenced to the joint anatomy, and improved osteotomy guides.