摘要:
A surgical stent made of biocompatible material for implantation in human tissue to enable blood and nutrients to flow from an area of vascular tissue to an area of tissue with little or no vasculature.
摘要:
A cannula has a flange and a body with slots extending through the entire flange and into the body. The cannula may also have a longitudinal slot extending its entire length. An obturator used with the cannula may also have a longitudinal slot extending along its length. A surgical method using these instruments includes separating lengths of suture and managing the suture by placing lengths of suture in the slots in the cannula. The cannula and obturator may be used after suture is already in place by placing the suture in the longitudinal slots and then introducing the cannula and obturator to the tissue defect site. The cannula may also be used to deliver a therapeutic implant to the tissue defect site. The instruments and method may be used in mensical surgery.
摘要:
The present invention relates to improved methods for making and using bioadhesive, bioresorbable, anti-adhesion compositions made of inter-macromolecular complexes of carboxyl-containing polysaccharides, polyethers, polyacids, polyalkylene oxides, multivalent cations and/or polycations. The polymers are associated with each other and are then either dried into membranes or sponges or are used as fluids or microspheres. Bioresorbable, bioadhesive, antiadhesion compositions are useful in surgery to prevent the formation and reformation of post-surgical adhesions. The compositions are designed to breakdown in vivo, and thus be removed from the body. Membranes are inserted during surgery either dry or optionally after conditioning in aqueous solutions. The antiadhesion, bioadhesive, bioresorptive, antithrombogenic and physical properties of such membranes and gels can be varied as needed by carefully adjusting the pH and/or cation content of the polymer casting solutions, polyacid composition, the polyalkylene oxide composition, or by conditioning the membranes prior to surgical use. Multi-layered membranes can be made and used to provide further control over the physical and biological properties of antiadhesion membranes. Membranes and gels can be used concurrently. Antiadhesion compositions may also be used to lubricate tissues and/or medical instruments, and/or deliver drugs to the surgical site and release them locally.
摘要:
An improved contact spring in a movement for a timepiece having a frame, a stepping motor, an energy cell, a circuit driving the stepping motor with a switching terminal for disabling the stepping motor, a gear train driven by the stepping motor, and a manually actuatable stem disposed in the frame. The improved contact spring comprises a shaped member of electrically conductive spring metal with a battery contact portion and a circuit supply portion respectively engaging the energy cell and the supply terminal of the circuit. The contact spring has a spring biased first arm actuated by movement of the stem, said first arm having a braking portion adapted to supply a braking force to a member of the gear train when the stem is actuated. The arm may further include a switching portion adapted to make and break contact with the switching terminal of the circuit to disable the stepping motor when the stem is actuated. The improved contact spring may further include a spring-biased second arm adapted to provide detenting of the stem.
摘要:
A movement for a three hand quartz analog timepiece has an energy cell supplying power to a timekeeping circuit which periodically steps the rotor of a Lavet type stepping motor. The stepping motor rotor drives a "seconds" wheel assembly attached to the "seconds" hand spindle through one or more intermediate wheel assemblies of gear, pinion, and spindle. A first intermediate wheel spindle of non-magnetic material is journaled such that its axis extends through the circumferential gap carrying magnetic flux between the rotor and the stator of the stepping motor. Several alternative means of journaling the first intermediate wheel assembly within the active flux gap of the stepping motor are shown and described, as well as movements having two intermediate wheel assemblies. The arrangement allows a small diameter "seconds" wheel and a relatively large energy cell, which provides a long running time for the movement.
摘要:
A wearable electronic device for conveying information in an analog manner at least in part by the use of at least one display hand positioned on the dial side of a dial, wherein the wearable electronic device uses the display hand(s) to convey information that is stored in the controller of the device and/or provided by sensors and/or an external transmitter. An actuation mechanism, preferably a stepper motor, is used to rotate the display hands in the clockwise and/or counterclockwise directions in predefined increments to convey the information.
摘要:
Surgical instruments for use in mapping tissue defects include telescoping rulers and tubes. One of the instruments has a pointed anchoring tip for piercing tissue near the site of the defect. Another instrument has a hook for catching an anatomical landmark. Measuring portions of the rulers of both instruments include distance indicia so that a coordinate system can be established for mapping the location of the defect or of an implant at the defect site. The coordinate system can be re-established at a later time using the same fixation point for the anchoring tip and the same landmark for the hook to evaluate the clinical effects of the treatment selected. The method of using the instrument set is also described.
摘要:
A device for locking a suture in place without the need for tying knots once the suture is placed within tissue is provided. The device comprises an anchor having a cannula and a locking mechanism for securing the suture within the cannula.