摘要:
A surgical instrument includes an end effector having a clevis and first and second jaws mutually rotatable between open and closed positions. The jaws are proximally directed and laterally displaced relative to a longitudinal axis of a control shaft of the instrument. The jaws hold first and second parts of a fastener, respectively. The first part includes a base having upstanding tissue piercing posts, and the second part includes another base defining apertures for receiving the posts, as well as a portion movable relative to the second base. When the upstanding posts are inserted into the apertures, the movable portion can be moved into a second configuration to lock the parts of the fastener together. The instrument is adapted to move the second part into the second configuration. A method for using the apparatus and fastener are also provided.
摘要:
Methods of the invention include delivering a grasper, a clip applier, and an endoscope transorally to the site of fundoplication; grasping the fundus with the grasper (or similar device, e.g. corkscrew) and pulling it into the jaws of the clip applier; closing the jaws of the clip applier over the fundus and applying a clip to the fundus.
摘要:
Surgical clips, which are particularly useful in the transoral invagination and fundoplication of the stomach to the esophagus, and methods of applying the surgical clips to living tissue are disclosed. The clips include first and second arms joined by a bridge to form a substantially U-shape, and which are provided with a first structure adapted to prevent a movement of the clip in a direction perpendicular to a longitudinal axis of the clip after the clip is applied to tissue. In addition, the clips preferably also include a second structure adapted to prevent rotation of the clip about the longitudinal axis of the clip after the clip is applied to tissue.
摘要:
An apparatus for the transoral invagination and fundoplication of the stomach to the esophagus includes a clip applier having sharp toothed jaws for grasping and damaging the fundus prior to applying the clip. The clip applier has an overall diameter of less than 7 mm. The clip applier jaws are coupled to a pull wire via a linkage which increases the mechanical advantage and thus permits greater grasping force. A plurality of clip designs are also provided.
摘要:
A flexible clip applier includes a flat wire wound outer tubular coil, a pair of jaws at the end of the coil, end effector wires extending through the coil and coupled to the jaws, and a clip-advancing wire extending through the coil. A large pushing force to advance a clip is created by providing a compressive force to the outer tubular coil to increase its tensile limitation, and providing a force which is compressive to the clip-advancing wire and tensile to the tubular coil while maintaining the compressive force on the tubular coil.
摘要:
A flexible clip applier includes a flat wire wound tubular coil, a pair of jaws at the end of the coil, end effector wires extending through the coil and coupled to the jaws, and a clip-advancing wire extending through the coil. A clip chamber is defined in the distal end of the coil. A clip pusher is provided at a distal end of the clip-advancing wire, and advances a clip into the jaws when the clip-advancing wire is moved distally. The jaws include channels in which a distalmost clip rides when the jaws are closed and the pusher is advanced, thereby causing the distalmost clip to be pushed over the tissue, and a distal anvil which operate to bend a portion of the clip to facilitate its retention on the clamped tissue. The device can push a clip with a force in excess of 1500 grams.
摘要:
Methods and apparatus for delivering a medical instrument over the exterior of an endoscope while the endoscope is installed in the patient's body allow the use of instruments which are too large to fit through the lumena of an endoscope. Furthermore, the invention allows the elimination of working lumena in an endoscope thereby minimizing the likelihood of contamination.
摘要:
The methods and devices of the invention include an encoder, an endoscopic robotic instrument, and an encoder/robotic instrument interface. A preferred embodiment of the encoder has a chest/shoulder plate provided with telescoping tubes and joints. Each joint is provided with a direct drive potentiometer to monitor movement and provide a corresponding signal. The chest plate is preferably adaptable to a large range of human chest sizes and the telescopic segments are strapped to the arms of the practitioner at the elbows. A pistol grip is provided at the wrist end of the telescopic segments. According to the presently preferred embodiment, the encoder encodes flexion and rotation at the shoulder, elbow and wrist of each arm in addition to gripping at each hand. The encoding device is coupled to a circuit which operates a servo system. The servo system includes a series of servo motors. A series of pulleys corresponding to the number of servo motors are arranged in a housing. The robotic instrument preferably comprises two arms mounted at the distal end of a multi-lumen tube. Each arm has rotational and flexional joints corresponding to the shoulder, elbow, and wrist of the practitioner. Tendons are coupled to the pulleys of the servo motors and are fed through the multi-lumen tube to the joints of the two arms.
摘要:
An endoscopic needle device includes an outer sheath, an elongate shaft extending through the sheath, a needle rigidly attached to the distal end of the shaft, and a handle assembly having a housing coupled to the proximal end of the sheath and having a syringe port in fluid communication with the sheath and a knob rotatably coupled to the housing. Rotation of the knob relative to the housing causes rotation of the shaft relative to the sheath. The needle and the distal end of the sheath are mated by a threaded connection. As such, rotation of the knob relative to the housing causes precise longitudinal movement and extension of the needle relative to the distal end of the sheath. A set of intermeshing gears are provided between the knob and shaft which function to permit at most one rotation of the knob to cause complete extension and/or retraction of the needle. Furthermore, assemblies are provided with permit the shaft to accommodate movement of the needle relative to the sheath. Moreover, the position of the knob relative to the housing provides an indication of the extension of the needle. As such, the injection needle device of the invention permits controllable and calibrated rotation of the needle to within a few degrees, such that the needle device can be easily, reliably, and precisely operated to advance the needle.
摘要:
An endoscopic or laparoscopic biopsy forceps instrument is provided which includes a flexible tubular member having proximal and distal ends, a biopsy jaw assembly at the distal end of the tubular member, an actuation assembly to operate the jaw assembly between open and closed positions, and a control assembly to deflect the biopsy jaw assembly relative to a lumen through which the instrument extends and to rotate the jaw assembly about the longitudinal axis of the instrument.