Electrosurgical cutting and sealing instrument
View Patent ↗A surgical instrument for supplying energy to tissue can comprise a jaw member comprising an electrode, wherein the electrode is configured to supply energy from a power source to captured tissue. The surgical instrument comprises a tissue-cutting element to transect the captured tissue. The rate of distal translation of the tissue-cutting element during the operational stroke may be regulated by an electromagnetic brake.
1. An electrosurgical instrument, comprising:
a handle;
an elongate shaft extending distally from the handle;
a trigger movable between a first position and a second position during an operational stroke;
an electromagnetic brake; and
an end effector coupled to a distal end of the elongate shaft, comprising:
a first jaw member;
a second jaw member, wherein the first jaw member is movable relative to the second jaw member between an open and a closed position; and
a tissue-cutting element configured to translate with respect to the first jaw member and the second jaw member;
an axially movable cutting member configured to move the first jaw member to the closed position, the tissue-cutting element positioned at a distal end of the axially movable cutting member, wherein the electromagnetic brake is configured to regulate movement of the axially movable cutting member at a plurality of positions during the operational stroke; and
an electrode.
2. The electrosurgical instrument of claim 1 , wherein the electromagnetic brake is configured to selectably engage the trigger.
3. The electrosurgical instrument of claim 2 , wherein the electromagnetic brake comprises a brake pad.
4. The electrosurgical instrument of claim 3 , wherein the electromagnetic brake comprises a solenoid coupled to the brake pad.
5. An electrosurgical instrument, comprising:
a handle;
an elongate shaft extending distally from the handle;
a trigger movable between a first position and a second position;
an electromagnetic brake; and
an end effector coupled to a distal end of the elongate shaft, comprising:
a first jaw member;
a second jaw member, wherein the first jaw member is movable relative to the second jaw member between an open and a closed position; and
a tissue-cutting element configured to translate with respect to the first jaw member and the second jaw member;
an axially movable cutting member configured to move the first jaw member to the closed position, the tissue-cutting element positioned at a distal end of the axially movable cutting member; and
an electrode, wherein the electromagnetic brake is configured to selectably engage the trigger, wherein the electromagnetic brake comprises a brake pad, wherein the brake pad comprises at least one pad ridge, and wherein at least one of the trigger and the axially movable cutting member comprises a brake pad engagement portion.
6. The electrosurgical instrument of claim 5 , wherein the brake pad engagement portion comprises a plurality of troughs.
7. The electrosurgical instrument of claim 6 , wherein the at least one pad ridge is configured to engage at least one of the plurality of troughs.
8. The electrosurgical instrument of claim 1 , further comprising a controller, wherein the controller is in electrical communication with the electromagnetic brake.
9. An electrosurgical instrument, comprising:
a handle;
an elongate shaft extending distally from the handle;
a trigger movable between a first position and a second position during an operational stroke;
an electrically activated brake comprising an engaging portion, wherein the engaging portion is configured to move from a non-engaged position to an engaged position;
a controller;
an end effector coupled to a distal end of the elongate shaft, comprising:
a first jaw member;
a second jaw member, wherein the first jaw member is movable relative to the second jaw member between an open and a closed position;
a tissue-cutting element configured to translate with respect to the first jaw member and the second jaw member; and
a sensor in electrical communication with the controller; and
an axially movable cutting member configured to move the first jaw member to the closed position, the tissue-cutting element positioned at a distal end of the axially movable cutting member, wherein the controller is configured to selectively activate the electrically activated brake to control a rate of motion of the axially movable cutting member at a plurality of positions during the operational stroke.
10. The electrosurgical instrument of claim 9 , wherein the sensor is one of an impedance sensor and a temperature sensor.
11. The electrosurgical instrument of claim 9 , wherein the controller is configured to move the electrically activated brake from the non-engaged position to the engaged position.
12. The electrosurgical instrument of claim 9 , wherein the engaging portion comprises a brake pad.
13. An electrosurgical instrument, comprising:
a handle;
an elongate shaft extending distally from the handle;
a trigger movable between a first position and a second position;
an electrically activated brake comprising an engaging portion, wherein the engaging portion is configured to move from a non-engaged position to an engaged position;
a controller;
an end effector coupled to a distal end of the elongate shaft, comprising:
a first jaw member;
a second jaw member, wherein the first jaw member is movable relative to the second jaw member between an open and a closed position;
a tissue-cutting element configured to translate with respect to the first jaw and the second jaw; and
a sensor in electrical communication with the controller; and
an axially movable cutting member configured to move the first jaw member to the closed position, the tissue-cutting element positioned at a distal end of the axially movable cutting member, wherein the engaging portion comprises a brake pad, wherein the brake pad comprises a plurality of teeth.
14. The electrosurgical instrument of claim 13 , wherein one of the axially movable cutting member and the trigger comprise a second plurality of teeth.
15. An electrosurgical instrument, comprising:
a handle;
an elongate shaft extending distally from the handle;
a trigger comprising a rotor movable between a first position and a second position during an operational stroke;
an end effector coupled to a distal end of the elongate shaft, comprising:
a first jaw member;
a second jaw member, wherein the first jaw member is movable relative to the second jaw member between an open and a closed position;
a tissue-cutting element configured to translate with respect to the first jaw member and the second jaw member; and
an electrode;
an axially movable cutting member configured to move the first jaw member to the closed position, the tissue-cutting element positioned at a distal end of the axially movable cutting member; and
an electromagnetic brake configured to selectively engage the rotor to selectively retard motion of the axially movable cutting member at an initial position, a final position, and at least one position between the initial and final positions during the operational stroke.
16. The electrosurgical instrument of claim 15 , wherein the rotor comprises iron.
17. The electrosurgical instrument of claim 15 , wherein the electromagnetic brake comprises a selectively magnetized portion positioned proximate the rotor.
18. The electrosurgical instrument of claim 15 , further comprising an electromagnetic brake controller.
19. The electrosurgical instrument of claim 18 , wherein the electromagnetic brake controller is configured to provide electrical current to a selectively magnetized portion of the electromagnetic brake.
20. The electrosurgical instrument of claim 18 , wherein the end effector further comprises a sensor configured to provide tissue data to the electromagnetic brake controller, wherein the tissue data is one of temperature data and impedance data.