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CN-115737112-B - Surgical electrode for electromagnetic knife

CN115737112BCN 115737112 BCN115737112 BCN 115737112BCN-115737112-B

Abstract

The invention relates to a surgical electrode for an electromagnetic knife, which comprises a front handle, a rear handle and an electrode core, wherein an electrode outlet is arranged at the front end of the front handle, the front handle and the rear handle are connected in a circumferential rotation manner, the electrode core penetrates through the front handle and the rear handle, the rear end of the electrode is fixed in the rear handle and is connected with a cable, the front handle and the rear handle can axially move, and the position of the electrode core is driven by the rear handle so that the front end of the electrode core extends out of the electrode outlet to accurately reach a surgical area. The invention solves the technical problems that the electrode head cannot be adjusted or the adjustment affects the operation after the existing bipolar radiofrequency ablation electrode enters a focus area, and the adjustment accuracy is low.

Inventors

  • ZHAO WEI
  • FU CHAO
  • QIAO JIANJIANG
  • GUO ZHIGANG

Assignees

  • 安进医疗科技（北京）有限公司

Dates

Publication Date
20260512
Application Date
20221117

Claims (11)

  1. 1. The surgical electrode for the electromagnetic knife is characterized by comprising a front handle, a rear handle and an electrode core, wherein an electrode outlet is formed in the front end of the front handle, the rear end of the front handle is connected with the front end of the rear handle in a circumferential rotation mode, the electrode core penetrates through the front handle and the rear handle, the rear end of the electrode is fixed in the rear handle and is connected with a cable, the front handle and the rear handle can axially move, and the position of the electrode core is driven by the rear handle so that the front end of the electrode core extends out of the electrode outlet; a first accommodating cavity is formed in the front handle, a telescopic part extending along the axial direction of the front handle is arranged at the front end of the rear handle, the telescopic part can circumferentially and rotatably extend into the first accommodating cavity, and the telescopic part can move in the first accommodating cavity along the axial direction of the rear handle; A plurality of circumferential positioning grooves are formed in the outer wall of the telescopic part at intervals along the circumferential direction of the telescopic part, and circumferential positioning protrusions which can be matched and clamped with the circumferential positioning grooves at corresponding positions are arranged on the inner wall of the opening of the first accommodating cavity so as to position the rotating angle of the electrode core; A plurality of axial positioning grooves are formed in the inner wall of the first accommodating cavity, the axial positioning grooves are distributed at intervals along the axial direction of the first accommodating cavity, and axial positioning protrusions which can be matched and clamped with the axial positioning grooves are arranged on the outer wall of the telescopic part in the first accommodating cavity so as to position the length of the front end of the electrode core extending out of the electrode outlet; the inner wall of rear portion handle is formed with the second accommodation chamber, the front end of rear portion handle is equipped with the intercommunication first accommodation chamber with the locking passageway of second accommodation chamber, locking passageway's cross-sectional area by first accommodation chamber to the second accommodation chamber direction dwindles gradually, the electrode core press from both sides tightly in locking passageway, the rear end of anodal wire electrode in the electrode core and the rear end of negative electrode wire electrode all stretch into to in the second accommodation chamber, just the rear end of anodal wire electrode with the rear end of negative electrode wire electrode is in the second accommodation chamber internal phase isolation.
  2. 2. The surgical electrode for an electromagnetic knife according to claim 1, further comprising an outer tube fixedly provided on the front handle, wherein a front end of the outer tube extends forward of the front handle, an opening through which the front end of the electrode core protrudes is provided in the outer tube at a position close to the front end of the outer tube, the opening being the electrode outlet, and the electrode core passes through the outer tube and the front end of the electrode core protrudes from the electrode outlet to the outside of the outer tube.
  3. 3. The surgical electrode for an electromagnetic knife of claim 2, wherein a spring is disposed within the first housing cavity, a forward end of the rear handle being movably extendable into the first housing cavity in an axial direction of the front handle, the spring being located between an inner wall of the first housing cavity and a forward end of the rear handle to provide a driving force to return to a home position for the rear handle after the rear handle is moved.
  4. 4. A surgical electrode for an electromagnetic knife as claimed in claim 3, wherein said telescoping portion is movable within said first housing chamber in an axial direction of said rear handle, and wherein said spring is connected at both ends to an inner wall of said first housing chamber and a front end of said telescoping portion, respectively.
  5. 5. A surgical electrode for an electromagnetic knife as claimed in claim 3, wherein a retaining ring is provided inside the front handle, the outer tube passes through a central aperture of the retaining ring, and an inner wall of the central aperture is compressed with an outer wall of the outer tube.
  6. 6. A surgical electrode for an electromagnetic knife as claimed in claim 3, wherein at least two grips are provided on an outer wall of said front handle, said grips being disposed on opposite sides of said front handle.
  7. 7. A surgical electrode for an electromagnetic knife as claimed in claim 3, wherein a separator is disposed within the second housing, the rear end of the positive electrode wire and the rear end of the negative electrode wire being located on either side of the separator, respectively.
  8. 8. A surgical electrode for an electromagnetic knife as claimed in claim 3, wherein said front handle is comprised of a splice of two front structural members having a semi-circular cross-section and said rear handle is comprised of a splice of two rear structural members having a semi-circular cross-section.
  9. 9. The surgical electrode for an electromagnetic knife of claim 8, wherein a front end cap is fixedly sleeved at the front end of the front handle to lock the two front structural members after the splicing and forming; the rear end of the rear handle is fixedly sleeved with a rear end cover so as to lock the two spliced and formed rear structural members.
  10. 10. The surgical electrode for an electromagnetic knife of claim 9, wherein a locking ring is fixedly sleeved on the front end of the rear handle so that the inner wall of the locking channel clamps the electrode core.
  11. 11. The surgical electrode for an electromagnetic knife of claim 1, wherein a first marker and a second marker are provided on an outer wall of the front handle and an outer wall of the rear handle, respectively, to cooperatively display a rotation angle between the front handle and the rear handle.

Description

Surgical electrode for electromagnetic knife Technical Field The invention relates to the field of medical instruments, in particular to a surgical electrode for an electromagnetic knife. Background The bipolar radiofrequency ablation electrode has been widely applied to a minimally invasive spinal surgery system consisting of an intervertebral foramen mirror, an imaging and image processing system and matched minimally invasive spinal surgery instruments, can thoroughly remove a protruding or prolapsed nucleus pulposus through extremely small wounds, and can be used for removing hyperosteogeny, treating spinal stenosis and the like. The intervertebral foraminioscope technology has the advantages of smaller trauma, less bleeding, less damage to muscles and ligaments around lumbar vertebrae, simpler anesthesia, quicker postoperative recovery, lighter economic burden and the like, and the bipolar radio frequency ablation electrode acts on soft tissues such as ligaments and the like, can play roles of coagulation hemostasis, thermal shrinkage, cauterization ablation and the like, and can repair broken fibrous rings and the like. The existing bipolar radiofrequency ablation electrode can extend out of the electrode head through pushing and pulling operations, but generally has a fixed deflection angle and cannot be adjusted. When the intervertebral foramoscope is used to enter the focus area, the incision is small, the operation is difficult, and because of the five factors of the body position angle, the visual angle range of the endoscope, the optical fiber light transmission angle, the angle of the electrode elbow and the position to be treated in operation, whether the focus area to be treated can be observed or not is determined, and the operation difficulty can be reduced to a great extent by adjusting the angle of the electrode, so that the risk of misoperation in operation is reduced. Therefore, when the deflection angle of the electrode after entering is deviated from the position to be treated, an operator can only adjust the deflection angle of the electrode by rotating the wrist or the arm to enable the electrode to approach the focus area, at the moment, the operator can only adjust the deflection angle of the electrode by rotating the wrist or the arm to enable the electrode to approach the focus area, and at the moment, the operator can be in an abnormal operation posture or an unaccustomed force direction, so that the treatment difficulty of the focus is correctly and accurately increased, the operation risk is increased, nerve roots, dura mater and the like are easily damaged during operation, the lower limb numbness, pain and even symptoms such as abnormal lower limb feeling occur, and the electrode handle can sometimes rotate to an angle which can not be correctly held, and the operation can not be continued, thereby bringing great trouble to doctors. In addition, the extending and retracting of the current bipolar radiofrequency ablation electrode tip is realized by holding and squeezing a handle deviated on a movement axis by hand, so that the front and rear structures for respectively fixing the electrode sleeve and the electrode core generate relative movement of tightening and pulling, and the electrode core generates relative movement relative to the electrode sleeve, thereby achieving the purpose of extending or retracting the electrode head. However, the operation mode has the defects that an operator cannot directly feel the pressure applied by the electrode stretching out to the target tissue, so that the solidification area and depth of the tissue cannot be controlled by applying accurate pressure, the mode needs to apply larger force to overcome the self elastic force of the handle, then the spring between the front part and the rear part is extruded, the electrode head stretching out is realized, the operation of the bipolar radiofrequency ablation electrode can be completed with larger force, the hand fatigue of the operator is easily caused under the condition of longer operation time, and the normal operation of the operation can be influenced. Aiming at the problems that the operation is affected by the incapability or adjustment of the electrode head after the existing bipolar radio frequency ablation electrode enters a focus zone in the related technology and the adjustment accuracy is low, no effective solution is provided at present. The present inventors have thus devised a surgical electrode for an electromagnetic knife, based on years of experience and practice in the relevant industry, to overcome the shortcomings of the prior art Disclosure of Invention The invention aims to provide a surgical electrode for an electromagnetic knife, which can feed back the pressure of the electrode tip contacted with tissues in the use process, and an operator can directly feel the fed-back pressure, so that the use effect can be better controlled, the operation is convenient, the ph