公开(公告)号：US11406409B2

公开(公告)日：2022-08-09

申请号：US15509074

申请日：2014-09-25

Applicant: COVIDIEN LP

Inventor： Weijiang Ding ,  Weisheng Lu ,  Jianjiang Chen ,  Peng Yi

IPC: A61B17/29 ,  A61B18/14 ,  A61B17/00 ,  A61B18/00 ,  A61B34/35

Abstract: A surgical instrument includes a housing, a shaft coupled to and extending distally from the housing, an end effector assembly disposed at a distal end of the shaft, a movable handle coupled to the housing, a drive assembly coupled to the end effector assembly, and an extension mechanism disposed within the housing. The extension mechanism is configured to couple to the shaft and between the movable handle and the drive assembly for moving the shaft and drive assembly between a retracted position and an extended position relative to the housing. The extension mechanism is coupled between the movable handle and the drive assembly in each of the retracted and extended positions such that the movable handle is operable to effect manipulation of the end effector assembly in each of the retracted and extended positions.

公开(公告)号：US20220133396A1

公开(公告)日：2022-05-05

申请号：US17575746

申请日：2022-01-14

Applicant: Covidien LP

Inventor： Weijiang Ding ,  Jianjiang Chen ,  Daniel A. Joseph ,  Kai Liu ,  William H. Nau, JR. ,  Arlen K. Ward ,  William R. Whitney

IPC: A61B18/14 ,  A61B18/00

Abstract: An end effector assembly includes a first jaw member having a first tissue contact surface and a second jaw member having a second tissue contact surface. The second jaw member is pivotally coupled to the first jaw member. The tissue contact surfaces may include raised steps that define an exhaust channel. A longitudinally extending knife slot may be defined in one or both of the tissue contact surfaces. One or more exhaust slots, which may be defined in one or both of the tissue contact surfaces, are in communication with the knife slot. The exhaust channel and the exhaust slots direct fluid away from the jaw members to minimize thermal damage risks associated with tissue sealing.

公开(公告)号：US11224478B2

公开(公告)日：2022-01-18

申请号：US15742717

申请日：2015-07-17

Applicant: COVIDIEN LP

Inventor： Weijiang Ding ,  Jianjiang Chen ,  Daniel A. Joseph ,  Kai Liu ,  William H. Nau, Jr. ,  Arlen K. Ward ,  William Ross Whitney

IPC: A61B18/14 ,  A61B18/00

Abstract: An end effector assembly (114) includes a first jaw member (114a) having a first tissue contact surface (122) and a second jaw member (114b) having a second tissue contact surface (122). The second jaw member (114b) is pivotally coupled to the first jaw member (114a). The tissue contact surfaces (122) may include raised steps (122b) that define an exhaust channel (124). A longitudinally extending knife slot (214) may be defined in one or both of the tissue contact surfaces (122). One or more exhaust slots (216), which may be defined in one or both of the tissue contact surfaces (122), are in communication with the knife slot (214). The exhaust channel (124) and the exhaust slots (216) direct fluid away from the jaw members (114a, 114b) to minimize thermal damage risks associated with tissue sealing.

公开(公告)号：US10987159B2

公开(公告)日：2021-04-27

申请号：US15752957

申请日：2015-08-26

Applicant: COVIDIEN LP

Inventor： Weijiang Ding ,  Kai Liu ,  Jianjiang Chen

IPC: A61B18/14 ,  A61B18/00

Abstract: An end effector assembly (100, 200) of an electrosurgical forceps (10, 10′) includes first and second jaw members (110, 120, 210, 220). At least one of the jaw members (110, 120, 210, 220) is movable relative to the other between a spaced-apart position and an approximated position. At least one of the jaw members (110, 120, 210, 220) includes an electrically-conductive inner member (115, 125) defining an outer surface, a first electrically-insulative layer (116, 126) disposed on a portion of the outer surface of the electrically-conductive inner member (115, 125), a second electrically-insulative layer (117, 127) disposed on another portion of the outer surface of the electrically-conductive inner member (115, 125), and an electrode (118, 128) disposed on the second electrically-insulative layer (117, 127) and electrically coupled to the electrically-conductive inner member (115, 125). The electrode (118, 128) defines a tissue-treating surface of the corresponding jaw member (110, 120, 210, 220). The first electrically-insulative layer (116, 126) has a thermal conductivity greater than that of the second electrically-insulative layer (117, 127).