Abstract:
An electrosurgical instrument for removing tissue includes a shaft and a cutting member. The shaft extends to a distal end and defines a lumen configured to communicate with a vacuum source. The cutting member is supported at the distal end of the shaft. The cutting member is adapted to couple to an electrosurgical energy source and is configured to form an annular loop. The cutting member is selectively transitionable from a first configuration, wherein the annular loop includes a first diameter to one or more additional configurations, wherein the annular loop includes a second diameter smaller than the first diameter. The annular loop is configured to sever tissue within the annular loop.
Abstract:
An end effector assembly includes opposed jaws moveable from an open to a closed position for grasping tissue therebetween. Each jaw includes an electrically conductive surface adapted to conduct electrosurgical energy through tissue disposed between the jaws. A static bipolar cutting portion including at least one electrically conductive cutting element and at least one insulating element having a first configuration is disposed on at least one of the jaws. The static cutting portion is configured to electrically cut tissue disposed between the jaws upon activation of the cutting element and at least one of an opposing sealing surface and an opposing cutting element. A dynamic cutting portion including at least one electrically conductive cutting element and at least one insulating element having a second configuration is disposed on at least one of the jaws. The dynamic cutting portion electrically transects tissue during movement relative to tissue.
Abstract:
An end effector of a forceps includes first and second jaw members movable between spaced-apart and approximated positions for grasping tissue. Each jaw member includes a tissue sealing plate that is selectively energizable. The tissue sealing plates are configured to conduct energy therebetween and though tissue to seal tissue. A knife includes a distal surface and an upper surface. The knife is selectively translatable between a retracted position and an extended position wherein the knife extends between the jaw members. The distal surface is configured for dynamic tissue cutting upon translation of the knife from the retracted to the extended position. The upper surface is configured for static tissue cutting with the knife in the extended position. The knife is selectively energizable and is configured to conduct energy between the knife and one or both of the tissue sealing plates and through tissue to electrically cut tissue.
Abstract:
An end effector of a forceps includes first and second jaw members movable between spaced-apart and approximated positions for grasping tissue. Each jaw member includes a tissue sealing plate that is selectively energizable. The tissue sealing plates are configured to conduct energy therebetween and though tissue to seal tissue. A knife includes a distal surface and an upper surface. The knife is selectively translatable between a retracted position and an extended position wherein the knife extends between the jaw members. The distal surface is configured for dynamic tissue cutting upon translation of the knife from the retracted to the extended position. The upper surface is configured for static tissue cutting with the knife in the extended position. The knife is selectively energizable and is configured to conduct energy between the knife and one or both of the tissue sealing plates and through tissue to electrically cut tissue.
Abstract:
A surgical instrument includes a flexible tube defining a proximal end and a distal end. An end effector, disposed at the distal end of the flexible tube, is configured for insertion into and advancement through a body cavity to a treatment target. The end effector is adapted to connect to a source of energy. The end effector includes an expandable member which can expand from an un-expanded state to an expanded state in order to circumferentially contact a bodily treatment target. The end effector further includes at least one heating member that may hear the expandable member such that the expandable member may thermally treat tissue that the expandable member contacts.
Abstract:
The electrosurgical systems and corresponding methods of the present disclosure involve an electrosurgical generator, sensing circuitry, and a controller. The electrosurgical generator includes a radio frequency (RF) output stage that supplies power to tissue. The sensing circuitry measures impedance of tissue. The controller controls the power supplied from the RF output stage to track a nonlinear power curve until the power supplied from the RF output stage has reached a predetermined peak power of the nonlinear power curve. The controller further determines whether a tissue reaction has occurred based on impedance measured by the sensing circuitry and controls the power supplied from the RF output stage during a cooling phase if the controller determines that a tissue reaction has occurred. The controller may further control the power supplied from the RF output stage to track a linear power curve.
Abstract:
An end effector assembly for a surgical instrument includes a pair of jaw members each including one or more tissue-contacting plates. One or both jaw members is movable relative to the other between spaced-apart and approximated positions for grasping tissue between the tissue-contacting plates. The tissue-contacting plates are adapted to connect to a source of energy for conducting energy through tissue grasped between. One of the jaw members includes an insulative member extending towards the other member. The insulative member includes a plurality of crests each defining a blunt apex and a proximally-facing sharpened edge. The blunt apexes contact tissue upon approximation of the first and second jaw members to grasp tissue, while the proximally-facing sharpened edges facilitate tissue cutting in a ripping fashion upon proximal translation of the end effector assembly relative to tissue.
Abstract:
The present disclosure is directed to a surgical system that may include an end effector assembly configured to conduct energy through tissue to treat tissue, the end effector assembly including at least one limited-use portion, the limited-use portion configured to degrade during use, and a control system configured to monitor degradation of the limited-use portion.
Abstract:
A method of treating bowel diseases includes introducing a fluid into a portion of a patient's colon and applying energy thereto from an external energy source such that the fluid and the energy cooperate to treat tissue of the portion of the patient's colon in contact with the fluid. Another method of treating inflammatory bowel diseases includes sealing a portion of a patient's colon, introducing an electrically-conductive fluid thereto, and energizing an electrode disposed therein to treat tissue of the portion of the patient's colon in contact with the electrically-conductive fluid. Another method of treating inflammatory bowel diseases includes sealing a portion of a patient's colon and introducing a heated fluid at a temperature equal to or above 60° C. to treat tissue of the portion of the patient's colon in contact with the heated fluid.
Abstract:
An end effector assembly includes opposed jaws moveable from an open to a closed position for grasping tissue therebetween. Each jaw includes an electrically conductive surface adapted to conduct electrosurgical energy through tissue disposed between the jaws. A static bipolar cutting portion including at least one electrically conductive cutting element and at least one insulating element having a first configuration is disposed on at least one of the jaws. The static cutting portion is configured to electrically cut tissue disposed between the jaws upon activation of the cutting element and at least one of an opposing sealing surface and an opposing cutting element. A dynamic cutting portion including at least one electrically conductive cutting element and at least one insulating element having a second configuration is disposed on at least one of the jaws. The dynamic cutting portion electrically transects tissue during movement relative to tissue.