Bipolar coagulation forceps

Abstract

The application discloses a bipolar electrocoagulation forceps, comprising: a first forceps body and a second forceps body, the front ends of which are provided with a first forceps tip and a second forceps tip, and the first forceps body and the second forceps body are respectively provided with a first control element and a second control element; an electrode seat, the electrode seat being provided with a third control element; two bipolar telescopic mechanisms, which are arranged in cavities of the first forceps body and the second forceps body, and the third control element drives the first forceps tip and the second forceps tip to synchronously extend or contract; the interiors of the first forceps body and the second forceps body are respectively provided with a first channel and a second channel, the outlet of the first channel is arranged at the front end of the first forceps body, the first control element controls the opening or closing of the first channel, and the inlet of the second channel is arranged at the front end of the second forceps body, and the second control element controls the opening or closing of the second channel. The bipolar electrocoagulation forceps can realize electrocoagulation, water dripping, flushing and suction at the same time, avoids secondary damage to tissues caused by replacement of other instruments during surgery, and improves the safety of surgery.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a bipolar electrocoagulation forceps. Background Technology

[0002] Bipolar electrocoagulation forceps are high-frequency electrosurgical instruments widely used in surgery for electrocoagulation hemostasis. Their working principle involves applying high-frequency electrical energy between two forceps tips, which heats the tissue, causing protein coagulation and blood vessel closure, thus achieving rapid and precise hemostasis. Because the current path is strictly confined between the two forceps tips, it causes minimal thermal damage to surrounding tissues and is highly safe. Therefore, it is widely used in surgeries in various departments, including cardiac surgery, neurosurgery, ophthalmology, general surgery, and orthopedics.

[0003] However, in clinical practice, simple electrocoagulation hemostasis often cannot meet all the needs of complex surgeries. The surgical process also involves core auxiliary procedures, such as fume / blood removal, surgical field cleaning, and forceps tip cooling. Currently, these auxiliary functions usually require the use of multiple instruments or the assistance of an assistant. In traditional surgical models, when the surgeon uses electrocoagulation forceps for hemostasis, the assistant must rely on independent suction devices, irrigation devices, and other auxiliary tools. This operational model suffers from significant delays in command transmission and coordination errors. When facing active bleeding or large amounts of fume, even a slight disconnect in coordination between the surgeon and assistant can affect the surgery, especially in procedures requiring extreme precision where the surgical field is small. Any delay or improper suction or irrigation can lead to higher surgical risks. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing bipolar electrocoagulation forceps, such as limited functionality, low operating efficiency, and poor versatility, and to provide a bipolar electrocoagulation forceps that integrates electrocoagulation, dripping, rinsing, and suction functions and is suitable for surgical scenarios in narrow passages.

[0005] To achieve the above objectives, the present invention provides a bipolar electrocoagulation forceps, comprising at least:

[0006] The bipolar electrocoagulation forceps body includes a first forceps body and a second forceps body. The front ends of the first forceps body and the second forceps body are provided with retractable first forceps tip and second forceps tip. The handheld ends of the first forceps body and the second forceps body are respectively provided with a first control element and a second control element.

[0007] The electrode holder has its rear ends connected to both the first and second tweezers, and a third control element is provided on the electrode holder.

[0008] Two bipolar telescopic mechanisms and a linkage crossbar are provided. The bipolar telescopic mechanisms are respectively located in the cavities of the first tweezers body and the second tweezers body. The front ends of the bipolar telescopic mechanisms are respectively connected to the rear ends of the first tweezers tip and the second tweezers tip. The rear ends of the bipolar telescopic mechanisms are connected to the third control element through the linkage crossbar. Under the action of the third control element, the bipolar telescopic mechanisms drive the first tweezers tip and the second tweezers tip to extend or retract synchronously.

[0009] The first tweezers body has a first channel along its length for dripping water or rinsing; the second tweezers body has a second channel along its length for suction; the outlet of the first channel is located at the front end of the first tweezers body, the first control element controls the opening or closing of the first channel, the inlet of the second channel is located at the front end of the second tweezers body, and the second control element controls the opening or closing of the second channel.

[0010] Preferably, the linkage crossbar is horizontally disposed within the electrode holder;

[0011] The sliding components of each of the two bipolar telescopic mechanisms are respectively disposed in the cavities of the first tweezers body and the second tweezers body;

[0012] Each of the sliding components includes:

[0013] The slide is located within the cavity of the forceps body;

[0014] A return spring is provided inside the slide rail, and the rear end of the return spring is fixed to one side of the linkage crossbar;

[0015] The T-shaped sliding rod has its front end connected to the rear end of the tweezer tip of the tweezer body, and its rear end connected to the front end of the return spring. The T-shaped sliding rod is adapted to the slide rail and slides within the slide rail, causing the tweezer tip of the tweezer body to extend or retract at the front end of the tweezer body.

[0016] Preferably, the bipolar telescopic mechanism further includes an axial limiting structure, the axial limiting structure comprising:

[0017] Two front-end annular limiting platforms are respectively located inside the front opening of the slide rail, and are used to form an axial limit with the front shoulder of the T-shaped sliding rod.

[0018] Two rear end limiting blocks are provided inside the slide rail and are used to form an axial limit with the rear end of the shoulder of the T-shaped sliding rod.

[0019] Preferably, the bipolar electrocoagulation tweezers further includes a locking structure, the locking structure comprising:

[0020] Two integrally formed spring pieces are symmetrically arranged on both sides of the rear end of the linkage crossbar. One end of each spring piece is located on the side wall of the rear end of the linkage crossbar, and the other end is a free end with an arc-shaped protrusion. Each spring piece is a conductor.

[0021] Two annular grooves, including a first annular groove and a second annular groove, are respectively disposed on the side wall of the electrode holder;

[0022] When the third control element is subjected to the first thrust, it drives the bipolar telescopic mechanism to move forward through the linkage crossbar. The reset spring is at the first compression amount, and the free ends of the arc-shaped protrusions of the two spring pieces are locked in the first annular groove. The first tweezer tip and the second tweezer tip extend out.

[0023] When the third control element is subjected to the second thrust, it drives the bipolar telescopic mechanism to move forward through the linkage crossbar. The reset spring is at the second compression amount, which is greater than the first compression amount. The free end of the arc-shaped protrusion of the spring piece exits from the first annular groove.

[0024] When the third control element is no longer subjected to the second thrust, the reset spring resets, and the third control element moves backward through the linkage crossbar until the free end of the arc-shaped protrusion of the spring is engaged in the second annular groove, and the first and second tweezer tips retract.

[0025] Preferably, the lengths of the first and second tweezer tips are 10mm to 12mm, the length of the slide is 150mm to 220mm, and the length of the T-shaped sliding rod is 20mm to 30mm.

[0026] Preferably, the inlet of the second channel is located on the front wall of the second tweezers body, and when the second tweezers tip is fully extended, the horizontal distance between the inlet of the second channel and the front end of the second tweezers tip is greater than 12mm.

[0027] Preferably, the first control element is connected to a flow-grade switching valve, which controls the on / off state of the first channel and the switching of flow modes, the flow modes including at least a dripping mode and a rinsing mode; the flow-grade switching valve includes at least a first flow-through orifice and a second flow-through orifice: when the first control element drives the flow-grade switching valve to the dripping mode, the inlet and outlet of the first channel are connected to the first flow-through orifice, and the first channel delivers liquid at a set flow rate of 0.05 ml / min to 0.3 ml / min to achieve the dripping function; when the first control element drives the flow-grade switching valve to the rinsing mode, the inlet and outlet of the first channel are connected to the second flow-through orifice, and the first channel delivers liquid at a set flow rate of 0.3 ml / min to 5 ml / min to achieve the rinsing function.

[0028] Preferably, the third control element includes an electrocoagulation control unit, the circuit of which is electrically connected to the first and second tweezer tips via a conductive core; the third control element is connected to a sleeve, which is fitted onto the rear end of the linkage crossbar; when the third control element is rotated, the sleeve drives the free ends of the two arc-shaped protrusions to rotate within the first annular groove, and the free ends of the two arc-shaped protrusions connect or disconnect with the contacts within the first annular groove, thus connecting or disconnecting the circuit.

[0029] Preferably, a medical silicone anti-reflux valve is also provided on the inner side of the inlet of the second channel.

[0030] Preferably, the electrode holder has an inlet of a first channel and an outlet of a second channel. The inlet of the first channel is used to connect to an external water inlet device, and the outlet of the second channel is used to connect to an external negative pressure device.

[0031] Compared to the prior art, the beneficial effects of the present invention include at least the following:

[0032] (1) The present invention has a drip / rinse channel and a suction channel respectively inside the first forceps and the second forceps. By turning on the drip mode or the rinse mode through the first control element, the drip cooling function with a small flow rate and the rinse function with a large flow rate can be realized during the electrocoagulation process. The suction mode can also be turned on through the second control element to realize the suction and smoke removal during the electrocoagulation process. A bipolar telescopic mechanism is provided inside the first forceps and the second forceps. The extension or retraction of the forceps tip can be realized through the third control element on the electrode seat. This makes it convenient to perform electrocoagulation, drip, rinse and suction in these areas without changing other auxiliary instruments or repeatedly taking out and inserting bipolar electrocoagulation forceps in deep tissue or delicate microvascular surgery. This avoids the artificial secondary damage to these tissues caused by repeated insertion of instruments and improves the safety of the operation.

[0033] (2) The bipolar electrocoagulation forceps of the present invention integrate electrocoagulation hemostasis, drip cooling, rinsing and suction functions to form an integrated operation closed loop. The drip cooling and rinsing functions provide non-adhesive and heat-damage-free operating conditions for electrocoagulation hemostasis. The suction function maintains a clear surgical field throughout all operations. The functions work together to enhance the effect. Compared with the traditional use of different independent instruments to meet different needs, the multifunctional integrated bipolar electrocoagulation forceps of the present invention achieves the precision, safety and efficiency of surgical operation. It is more suitable for narrow channel surgical scenarios such as deep tissue or fine microvessels, and solves the clinical difficulties of such surgery such as "limited space, poor field of vision and high difficulty of instrument placement / operation". Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall external structure of a bipolar electrocoagulation tweezers according to the present invention.

[0035] Figure 2 This is a schematic cross-sectional view of a bipolar electrocoagulation tweezers according to the present invention.

[0036] Figure 3 This is a magnified view showing the details of the bipolar electrocoagulation forceps of the present invention retracting into the forceps body.

[0037] Figure 4 For the present invention Figure 2 A magnified view of the details of part A in the middle.

[0038] Figure 5 For the present invention Figure 2 A magnified view of the details of part B in the middle.

[0039] Figure 6 For the present invention Figure 2 A detailed magnified view of the side section of part C in the middle.

[0040] Figure 7 For the present invention Figure 2 A magnified view of the cross-section of section C in the middle.

[0041] Attached Figure Labels

[0042] 1-First tweezers body, 11-First tweezers tip, 12-First channel, 121-Outlet of the first channel, 122-Inlet of the first channel, 2-Second tweezers body, 21-Second tweezers tip, 22-Second channel, 221-Inlet of the second channel, 222-Outlet of the second channel, 31-Slide rail, 311-T-shaped sliding rod, 312-Front end annular limiting platform, 313-Rear end limiting block, 32-Reset spring, 321-Spring piece, 3211-Free end of arc-shaped protrusion, 3212-Contact point, 33-Linkage crossbar, 331-Rear end of linkage crossbar, 34-First annular groove, 35-Second annular groove, 4-First control element, 5-Second control element, 6-Third control element, 61-Sleeve, 7-Electrode holder, 71-Conductive core. Detailed Implementation

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] definition

[0045] Front end: The front end described in this invention is the end that is close to the target tissue during surgical operation.

[0046] Back end: The back end described in this invention is the end closest to the operator's operation.

[0047] In clinical surgery, when using electrocoagulation forceps to precisely coagulate bleeding points, other auxiliary operations are usually required: (1) Smoke / blood accumulation removal: promptly remove the smoke generated by electrocoagulation and blood accumulation in the surgical field to maintain a clear field of vision; (2) Surgical field cleaning: rinse the tissue surface to wash away blood clots and debris; (3) Forceps tip cooling: prevent the forceps tip from sticking to the tissue due to overheating or causing unnecessary thermal damage to the surrounding tissue. During the operation, based on different auxiliary operation requirements, multiple instruments need to be changed back and forth. This operation mode not only prolongs the operation time and increases the error rate, but also has significant drawbacks for some deep tissue electrocoagulation, such as repeatedly taking out and putting back the electrocoagulation forceps. It will not only reduce the efficiency of the operation, but also have multiple negative impacts on the safety and stability of the surgical field of deep tissue surgery. Combined with the characteristics of the limited surgical field, small operating space and complex tissue layers in deep tissue surgery, the core reasons are as follows:

[0048] (1) Damaged surgical field exposure increases blind spots and risk of accidental injury: The surgical field exposure of deep tissue surgery needs to be maintained with the help of instruments such as retractors and retractors. When electrocoagulation forceps are repeatedly removed and inserted, the established surgical field space is easily disturbed, causing surrounding tissues to fall back and cover the bleeding point / operation area. Moreover, the deep tissue field of view itself is limited, and it is difficult to quickly and accurately align the target position when repeatedly inserted, which can easily touch the surrounding blood vessels, nerves or normal tissues, causing complications such as secondary bleeding and nerve damage.

[0049] (2) Prolonged operation time, aggravated tissue damage and surgical risks: The core requirement of deep tissue electrocoagulation is rapid and accurate hemostasis. Repeated removal and removal of electrocoagulation forceps will greatly prolong the hemostasis operation time, causing continuous bleeding from the bleeding point, resulting in increased blood accumulation in the surgical field and further obscuring the field of vision. At the same time, prolonged exposure of the surgical field and tissue traction will aggravate ischemia and edema damage in deep tissues, especially for deep tissues in important areas such as the pelvis, thoracic cavity, and intracranial cavity. Prolonged operation time will directly increase the overall surgical risk.

[0050] (3) Damage to tissue layers and increase the probability of postoperative adhesions: Deep tissues have clear anatomical layers. When electrocoagulation forceps are repeatedly picked up and put down, the forceps body is prone to scraping and pulling on the surrounding soft tissues such as fascia, mesentery, and vascular sheath, which damages the original anatomical structure and integrity of the tissues. Damaged tissue surfaces are prone to adhesions after surgery, affecting the normal function of organs and increasing the probability of postoperative complications.

[0051] (4) Decreased operational precision and affected electrocoagulation effect: Deep tissue electrocoagulation requires extremely high positioning precision of the forceps tip. After repeated picking and placing, the surgeon needs to readjust the hand posture and adapt to the operating space, making it difficult to quickly achieve precise clamping of the bleeding point by the forceps tip. If the forceps tip is mispositioned, it will not only lead to incomplete electrocoagulation hemostasis, but may also cause thermal damage to the surrounding normal tissue due to the excessive electrocoagulation range, which is contrary to the surgical principle of precise electrocoagulation.

[0052] To address the aforementioned issues, this invention provides a bipolar electrocoagulation forceps. A bipolar telescopic mechanism is added to the cavities of the two forceps bodies, allowing the forceps tips to extend and retract. Furthermore, a first channel and a second channel are added to the cavities of the two forceps bodies, respectively for dripping / rinsing and suction / fume removal. This invention allows for electrocoagulation hemostasis when the forceps tips are extended, while simultaneously performing dripping cooling or rinsing. When the forceps tips retract into the cavities of the forceps bodies, the bipolar electrocoagulation forceps can be used as ordinary forceps or in suction mode for precise removal of electrocoagulation products, accumulated blood / fluid, and tissue debris from the surgical area and surrounding tissues. Especially for deep tissue surgeries, the integrated bipolar electrocoagulation forceps can perform the entire process of electrocoagulation hemostasis, fume / blood removal, surgical field cleaning, and forceps tip cooling in situ, eliminating the need for repeated removal and insertion of the bipolar electrocoagulation forceps from deep tissues and the need to replace other auxiliary instruments, reducing secondary damage to deep tissues and improving surgical safety.

[0053] like Figures 1-3 As shown, a bipolar electrocoagulation forceps of the present invention includes: a bipolar electrocoagulation forceps body, the bipolar electrocoagulation forceps body including a first forceps body 1 and a second forceps body 2, the front ends of the first forceps body 1 and the second forceps body 2 being provided with retractable first forceps tip 11 and second forceps tip 21, and the handheld ends of the first forceps body 1 and the second forceps body 2 being provided with a first control element 4 and a second control element 5 respectively; an electrode base 7, the rear ends of the first forceps body 1 and the second forceps body 2 being connected to the electrode base 7, and the electrode base 7 being provided with a third control element 6; and two bipolar telescopic mechanisms, the bipolar telescopic mechanisms being respectively disposed in the cavities of the first forceps body 1 and the second forceps body 2, the front ends of the bipolar telescopic mechanisms being respectively connected to the rear ends of the first forceps tip 11 and the second forceps tip 21. The rear end of the bipolar telescopic mechanism is connected to the third control element 6 via a linkage crossbar 33. Pressing the third control element 6 causes the bipolar telescopic mechanism to drive the first tweezer tip 11 and the second tweezer tip 21 to extend or retract synchronously. The interior of the first tweezer body 1 and the second tweezer body 2 are respectively provided with a first channel 12 and a second channel 22 along their length direction. The outlet 121 of the first channel is located at the front end of the first tweezer body 1. Rotating the first control element 4 controls the opening or closing of the first channel 12 for dripping water or rinsing. The inlet 221 of the second channel is located at the front end of the second tweezer body 2. Pressing the second control element 5 controls the opening or closing of the second channel 22 for suction.

[0054] To facilitate operator operation, the first control element 4 and the second control element 5 of the present invention are both located on the hand-held end of the forceps body. The first control element 4 is located on the surface of the first forceps body 1 near the second forceps body 2, or on the surface away from the second forceps body 2. The second control element 5 is located on the surface of the second forceps body 2 near the first forceps body 1, or on the surface away from the first forceps body 1. The third control element 6 is located at the center of the electrode base 7.

[0055] During electrocoagulation hemostasis, a high-frequency current passes through the bleeding point held by the forceps, causing the water in the tissue to vaporize instantly, the proteins to deform and coagulate, and the blood vessel walls to carbonize and close. This process directly generates surgical smoke, obscuring the surgical field. The suction function of the second channel 22 of this invention can be activated simultaneously during the electrocoagulation operation to remove the smoke. During the electrocoagulation operation, the external negative pressure device connected to the outlet 222 of the second channel is always in the open state. The opening of the second channel 22 is controlled by the control valve of the second control element 5, which can suck the smoke into the collection bottle of the negative pressure device at the moment it is generated, thus maintaining a clear view of the surgical area and allowing the surgeon to accurately control the gripping position of the forceps and the effective range of electrocoagulation. The inner diameter of the second channel 22 is 1.5mm~2mm.

[0056] The core of electrocoagulation hemostasis is to coagulate and close the blood vessels at the bleeding point. However, during the procedure, trace amounts of incompletely coagulated blood, eschar debris, and carbonized tissue particles often remain in the surgical area. This blood quickly covers the hemostatic surface, making it difficult for the surgeon to visually determine whether the bleeding point has truly coagulated and closed. It also obscures the surgical area, affecting subsequent electrocoagulation procedures. Furthermore, in deep tissue or delicate microvascular surgeries, if the forceps tips are fixed and exposed, even if bipolar electrocoagulation forceps also integrate suction functionality, it is difficult to meet the surgical requirements. The main reason is:

[0057] (1) Deep tissues (such as the intracranial cavity, pelvic cavity, and deep thoracic cavity) have narrow operating channels. When the exposed forceps are inserted into the surgical area, they are easy to scrape and pull the fragile tissues around the channel (such as mucosa, vascular sheath, and nerves), causing unnecessary collateral damage.

[0058] (2) Electrocoagulation of microvessels and microbleeds requires extremely high precision in the clamping and positioning of the forceps tip. Since the length of the fixed forceps tip is not adjustable, the operator needs to adjust the hand posture to match the operating angle, which can easily cause hand tremors and affect the positioning accuracy.

[0059] Therefore, to address the aforementioned clinical pain points, the forceps tips of this invention are all designed as retractable forceps tips. When electrocoagulation is not required but timely aspiration of contaminants is necessary, there is no need to change instruments back and forth. The forceps tips can be directly retracted into the cavity of the forceps body in the surgical area. After aspiration, the forceps tips can be extended in situ in the surgical area to continue electrocoagulation and other operations. This invention achieves the linkage of electrocoagulation, water dripping, cleaning, and aspiration functions simultaneously through the extension and retraction of the forceps tips, realizing an operational closed loop and functional synergy that traditional instruments cannot achieve. This minimizes mechanical damage to tissues caused by the instruments and reduces the probability of postoperative complications.

[0060] like Figures 4-6 As shown, the present invention provides a bipolar telescopic mechanism in the cavity of the first tweezers 1 and the second tweezers 2. Each bipolar telescopic mechanism includes a sliding component and an axial limiting structure. Each sliding component includes a slide rail 31, a reset spring 32, and a T-shaped sliding rod 311. Each axial limiting structure includes a front annular limiting platform 312 and a rear limiting block 313.

[0061] The bipolar electrocoagulation tweezers also include a locking structure located within the electrode base 7. This locking structure comprises two integrally formed spring contacts 321, a first annular groove 34, and a second annular groove 35. The spring contacts 321 are symmetrically arranged on both sides of the rear end 331 of the linkage crossbar, with one end located on the side wall of the rear end 331 of the linkage crossbar and the other end being a free end 3211 with an arc-shaped protrusion. The first annular groove 34 is near the tip of the tweezers, and the second annular groove 35 is near the electrode base 7. Two contacts are provided within the first annular groove 34. The spring contacts 321 can rotate within the first annular groove 34. When the spring contacts 321 are connected to the contacts, the electrocoagulation circuit is activated.

[0062] It should be noted that, in order to clearly and concisely describe the overall structure of the bipolar telescopic mechanism, when describing the sliding component and axial limiting structure of the bipolar telescopic mechanism, since the structure, position, and connection relationship of each component of the sliding component and axial limiting structure in the first tweezers body 1 and the second tweezers body 2 are the same, the following description only uses the sliding component and axial limiting structure in the first tweezers body 1 as an example.

[0063] The slide rail 31 is located within the cavity of the first tweezers body 1, parallel to the first channel 12, and its inner diameter is larger than that of the first channel 12. The front end of the T-shaped sliding rod 311 is fixed to the rear end of the first tweezer tip 11. The T-shaped sliding rod 311 is adapted to the slide rail 31 and can slide within it. The return spring 32 is located within the slide rail 31, its front end connected to the rear end of the T-shaped sliding rod 311, and its rear end fixed to the front end of the linkage crossbar 33. The front-end annular limiting platform 312 is located inside the front opening of the slide rail 31. Its inner diameter is smaller than the outer diameter of the shoulder of the T-shaped sliding rod 311, and larger than the maximum outer diameter of the first tweezer tip 11 and the second tweezer tip 21. It forms an axial limit with the front end of the shoulder of the T-shaped sliding rod 311, limiting the maximum extension distance of the first tweezer tip 11, achieving radial positioning after extension, and preventing the first tweezer tip 11 from swaying or shaking. The rear limit block 313 is located inside the slide rail 31 and is used to form an axial limit with the rear end of the shoulder of the T-shaped sliding rod 311 to limit the maximum distance of the retraction of the first tweezer tip 11.

[0064] The two spring contacts 321 of this invention are integrally formed conductive bodies. One end of each spring contact 321 is fixed to the side wall of the rear end 331 of the linkage crossbar, and the other end is a free end 3211 with an arc-shaped protrusion. A first annular groove 34 and a second annular groove 35 are formed on the side wall of the electrode base 7. The first annular groove 34 is close to the tip of the tweezers, and the second annular groove 35 is close to the electrode base 7. The free end 3211 with the arc-shaped protrusion of the spring contact 321 can be engaged in the first annular groove 34 or the second annular groove 35. The extension and retraction mechanism of the first tweezer tip 11 and the second tweezer tip 21 is as follows:

[0065] (1) When the third control element 6 is pressed, the third control element 6 is pushed by a force, which drives the reset spring 32 and the T-shaped sliding rod 311 to move a first distance to the front end through the linkage crossbar 33. The reset spring 32 is in the first compression amount. When the front end of the "T"-shaped shoulder of the T-shaped sliding rod 311 is locked in the front end annular limiting platform 312, the free ends 3211 of the arc-shaped protrusions of the two spring pieces 321 are locked in the first annular groove 34 at point a. The first tweezer tip 11 and the second tweezer tip 21 are completely in the extended locking state.

[0066] (2) When the third control element 6 is pressed again, the third control element 6 is subjected to a second thrust, which drives the reset spring 32 and the T-shaped sliding rod 311 to move a second distance to the front end through the linkage crossbar 33. The reset spring 32 is at a second compression amount, which is greater than the first compression amount. At this time, the free ends 3211 of the arc-shaped protrusions of the two spring pieces 321 move from point a of the first annular groove 34 to point b of the first annular groove 34, and then exit from the first annular groove 34.

[0067] (3) When the hand is released, the third control element 6 is no longer subjected to the second thrust, the reset spring 32 is reset, and the third control element 6 is driven to move backward through the linkage crossbar 33 until the rear end of the "T"-shaped shoulder of the T-shaped sliding rod 311 is locked in the rear end limit block 313, the free end 3211 of the arc-shaped protrusion of the spring piece 321 is locked in point a of the second annular groove 35, and the first tweezer tip 11 and the second tweezer tip 21 are completely in the contracted and locked state.

[0068] like Figure 6 , 7 As shown, to achieve electrocoagulation hemostasis, the circuit can be switched on or off by rotating the third control element 6. The third control element 6 includes an electrocoagulation control unit, whose circuit is electrically connected to the first forceps tip 11 and the second forceps tip 21 via a conductive core 71. The third control element 6 is connected to a sleeve 61, which is fitted onto the rear end 331 of the linkage crossbar. It can be understood that by pressing the third control element 6, the linkage crossbar 33 can move back and forth, thus extending and retracting the forceps tip. Of course, as the third control element 6 is rotated, the sleeve 61 rotates, which in turn rotates the rear end 331 of the linkage crossbar (the front end of the linkage crossbar 33 does not rotate). This causes the spring piece 321 on the side wall of the rear end 331 of the linkage crossbar to rotate. When the free end 3211 of the arc-shaped protrusion of the spring piece 321 rotates and contacts the two contact points 3212 in the first annular groove 34, the circuit is connected. The high-frequency current is conducted to the conductive core 71 through the electrode seat 7. The conductive core 71 transmits the current along the axial direction of the forceps body to the first forceps tip 11 and the second forceps tip 21, so that an electrocoagulation circuit is formed between the bipolar forceps tips, realizing electrocoagulation hemostasis of the tissue. When electrocoagulation hemostasis is not required, the third control element 6 is rotated again, so that the free end 3211 of the arc-shaped protrusion of the spring piece 321 is disconnected from the contact point 3212, thereby cutting off the circuit.

[0069] In some embodiments, the slide 31 is a perforated slide with an inner diameter of 10mm to 15mm, the length of the slide 31 is 150mm to 220mm, the length of the first tweezer tip 11 and the second tweezer tip 21 is 10mm to 12mm, the length of the T-shaped sliding rod 311 is 20mm to 30mm, and the horizontal distance between the rear end limiting block 313 and the front end of the first tweezer body 1 is 35mm to 40mm.

[0070] In some embodiments, in order to make the entire bipolar electrocoagulation forceps lighter, the forceps tip and T-shaped sliding bar 311 are made of lightweight medical alloy, and the forceps body is made of medical grade polyetheretherketone.

[0071] The inlet 221 of the second channel of this invention is located on the front wall of the second forceps body 2. When the second forceps tip 21 is fully extended, the horizontal distance between the inlet 221 of the second channel and the front end of the second forceps tip 21 is greater than 12 mm. When the second forceps tip 21 is fully retracted into the interior of the second forceps body 2, the inlet 221 of the second channel is fully exposed, allowing the suction function to remove residues after the electrocoagulation operation, when the first forceps tip 11 and the second forceps tip 21 have retracted into the interior of the forceps body. That is, after electrocoagulation, the first forceps tip 11 and the second forceps tip 21 are controlled to retract into their respective forceps bodies, at which point the second control element 5 is activated to realize the suction function after electrocoagulation.

[0072] During the electrocoagulation process, bipolar electrocoagulation forceps accumulate a large amount of heat, and the temperature can rise rapidly to over 100°C. If the temperature is not cooled in time, the forceps tip may adhere to the tissue. During electrocoagulation hemostasis, uncoagulated blood, eschar, and broken tissue debris will remain in the surgical area. These substances will quickly cover the bleeding point and the operating area. In particular, the surgical field is limited in deep tissue surgery, and a blurred surgical field will make it impossible for the surgeon to accurately locate the bleeding point, or even accidentally clamp normal tissue. To achieve the cooling and rinsing functions of the tweezers tip, the cavity of the first tweezers body 1 is provided with a first channel 12 (drip / rinse channel). The inlet 122 (water inlet) of the first channel is connected to the water inlet device. The inner diameter of the first channel 12 is 0.3mm~0.5mm. The outlet 121 (water outlet) of the first channel is located on the front wall of the first tweezers body 1, and the horizontal distance between it and the front end of the first tweezers body 1 is greater than 21mm. The diameter of the water outlet is 0.3mm~0.5mm, and it is at an angle of 15°~30° to the clamping surface of the first tweezers tip 11 towards the working end of the first tweezers tip 11.

[0073] It should be noted that the extensions of the first channel 12 and the second channel 22 inside the electrode holder 7 are laid along the inner wall of the electrode holder 7 and then connected to the inlet 122 of the first channel and the outlet 222 of the second channel.

[0074] This invention uses a first control element 4 to control the first channel 12 to achieve water output. Furthermore, the first control element 4 is connected to a flow-grade switching valve, which controls the on / off state of the first channel 12 and the flow mode switching, thereby achieving closed inlet water, small-flow dripping for tweezer tip cooling, and large-flow inlet water for tissue irrigation. The flow-grade switching valve is an integrated flow-grade switching valve, connected in series at the inlet of the first channel 12. Its valve seat has two flow holes of different diameters (a first flow hole and a second flow hole). The first flow hole is a micro-aperture flow hole with a diameter of 0.1mm~0.2mm, and the second flow hole is a conventional aperture flow hole with a diameter of 0.5mm~1.0mm. The valve core of the flow-grade switching valve is linked to the first control element 4. When the first control element 4 drives the valve core to rotate to the dripping mode, the inlet and outlet of the first channel 12 connect to the first flow hole, and water... The water flows through the first flow-limiting orifice and exits from the outlet 121 of the first channel at a flow rate of 0.05 ml / min to 0.3 ml / min, achieving the drip cooling function. When the first control element 4 drives the valve core to rotate to the flushing mode, the inlet and outlet of the first channel 12 are connected to the second flow-limiting orifice, and the water flows through the second flow-limiting orifice and exits from the outlet 121 of the first channel at a flow rate of 0.3 ml / min to 5 ml / min, achieving the flushing function. When the first control element 4 drives the valve core to rotate to the closed mode, no water flows through, and the drip / flushing function is turned off. Therefore, it can be understood that the first control element 4 of the present invention has at least three adjustment functions.

[0075] In some embodiments, to prevent eschar debris and bloody fluid removed after electrocoagulation from flowing back into the electrocoagulation hemostasis surface or surgical area within the second channel 22, the present invention provides a medical silicone anti-reflux valve on the inner side of the inlet 122 of the second channel. When the negative pressure device is activated, a negative pressure is formed within the second channel 22. The pressure difference pushes the central cross-shaped micro-slit of the medical silicone anti-reflux valve to open inwards towards the second channel 22, allowing smoke, blood, eschar, etc., to pass smoothly through the valve into the second channel 22 for removal. When the negative pressure stops or the pressure reverses within the second channel 22, the medical silicone anti-reflux valve loses its negative pressure thrust. Relying on the elastic recovery force of the silicone itself, the central cross-shaped micro-slit closes naturally, forming a seal and completely blocking the reflux path, preventing the removed contaminants from flowing back into the surgical area or the interior of the forceps.

[0076] It is understood that the bipolar electrocoagulation forceps of this invention can switch between different modes, enabling single-mode operation (e.g., electrocoagulation, dripping, rinsing, suction) or dual-mode or triple-mode operation (e.g., electrocoagulation + dripping, electrocoagulation + dripping + suction and fume extraction, electrocoagulation + rinsing). Different modes can be switched by pressing different control elements in situ to meet different surgical needs.

[0077] Taking deep tissue surgery as an example, the working principle of the bipolar electrocoagulation forceps of this invention is as follows:

[0078] (1) Place the bipolar electrocoagulation forceps into the deep tissue, press the third control element, the first and second forceps tips extend, rotate the third control element, the high frequency circuit is turned on, the electrocoagulation mode is turned on, and the electrocoagulation hemostasis operation is performed.

[0079] (2) Press the second control element to turn on the suction mode and perform suction and smoke exhaust during the electrocoagulation process;

[0080] (3) During electrocoagulation, the first control element is rotated so that the first channel is connected to the first flow passage of the flow grade switching valve. The flow rate of physiological saline in the first channel is 0.05 ml / min to 0.3 ml / min. Water is dripped while electrocoagulating to cool the tweezers tip and prevent adhesion. The first control element is rotated so that the first channel is connected to the second flow passage of the flow grade switching valve. The flow rate of physiological saline in the first channel is 0.3 ml / min to 5 ml / min. While electrocoagulating, the first and second tweezers tips and the surrounding eschar debris are quickly rinsed away.

[0081] (4) If a lot of residual contaminants have been generated during the electrocoagulation hemostasis process and obscure the surgical field, rotate the third control element in place to cut off the electrocoagulation pathway, and press the third control element again to make the first forceps tip and the second forceps tip retract into the first forceps body and the second forceps body. At this time, the bipolar electrocoagulation forceps are used as ordinary forceps. Press the second control element to turn on the suction mode and accurately remove the residual contaminants generated in the surgical area by the electrocoagulation operation.

[0082] (5) Depending on the actual surgical needs, the above operations can be performed repeatedly in situ in deep tissues to complete the surgery.

[0083] In summary, the bipolar electrocoagulation forceps of this invention are provided with a dripping / rinsing channel and a suction channel inside the first forceps body and the second forceps body, respectively. The first control element can achieve low-flow dripping cooling and high-flow rinsing, while the second control element can achieve suction of residues during and after electrocoagulation. The invention also features a bipolar telescopic mechanism inside the first and second forceps bodies, and the third control element can extend or retract the first and second forceps tips. This facilitates electrocoagulation operations in deep tissues without the need to change auxiliary instruments or repeatedly remove and insert the bipolar electrocoagulation forceps. Electrocoagulation, dripping, rinsing, and suction can be performed simultaneously in situ in deep tissues, avoiding secondary tissue damage and improving surgical safety.

[0084] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A bipolar electrocoagulation tweezers, characterized in that, At least includes: The bipolar electrocoagulation forceps body includes a first forceps body and a second forceps body. The front ends of the first forceps body and the second forceps body are provided with retractable first forceps tip and second forceps tip. The handheld ends of the first forceps body and the second forceps body are respectively provided with a first control element and a second control element. The electrode holder has its rear ends connected to both the first and second tweezers, and a third control element is provided on the electrode holder. Two bipolar telescopic mechanisms and a linkage crossbar are provided. The bipolar telescopic mechanisms are respectively located in the cavities of the first tweezers body and the second tweezers body. The front ends of the bipolar telescopic mechanisms are respectively connected to the rear ends of the first tweezers tip and the second tweezers tip. The rear ends of the bipolar telescopic mechanisms are connected to the third control element through the linkage crossbar. Under the action of the third control element, the bipolar telescopic mechanisms drive the first tweezers tip and the second tweezers tip to extend or retract synchronously. The first tweezers body has a first channel along its length for dripping water or rinsing; the second tweezers body has a second channel along its length for suction; the outlet of the first channel is located at the front end of the first tweezers body, and the first control element controls the opening or closing of the first channel; the inlet of the second channel is located at the front end of the second tweezers body, and the second control element controls the opening or closing of the second channel. The locking structure includes: Two integrally formed spring pieces are symmetrically arranged on both sides of the rear end of the linkage crossbar. One end of each spring piece is located on the side wall of the rear end of the linkage crossbar, and the other end is a free end with an arc-shaped protrusion. Each spring piece is a conductor. Two annular grooves, including a first annular groove and a second annular groove, are respectively disposed on the side wall of the electrode holder.

2. The bipolar electrocoagulation forceps as described in claim 1, characterized in that, The linkage crossbar is horizontally installed inside the electrode holder; The sliding components of each of the two bipolar telescopic mechanisms are respectively disposed in the cavities of the first tweezers body and the second tweezers body; Each of the sliding components includes: The slide is located within the cavity of the forceps body; A return spring is provided inside the slide rail, and the rear end of the return spring is fixed to the front end of the linkage crossbar; The T-shaped sliding rod has its front end connected to the rear end of the tweezer tip of the tweezer body, and its rear end connected to the front end of the return spring. The T-shaped sliding rod is adapted to the slide rail and slides within the slide rail, causing the tweezer tip of the tweezer body to extend or retract at the front end of the tweezer body.

3. The bipolar electrocoagulation forceps as described in claim 2, characterized in that, The bipolar telescopic mechanism further includes an axial limiting structure, which comprises: Two front-end annular limiting platforms are respectively located inside the front opening of the slide rail, and are used to form an axial limit with the front shoulder of the T-shaped sliding rod. Two rear end limiting blocks are provided inside the slide rail and are used to form an axial limit with the rear end of the shoulder of the T-shaped sliding rod.

4. The bipolar electrocoagulation forceps as described in claim 2, characterized in that, When the third control element is subjected to the first thrust, it drives the bipolar telescopic mechanism to move forward through the linkage crossbar. The reset spring is at the first compression amount, and the free ends of the arc-shaped protrusions of the two spring pieces are locked in the first annular groove. The first tweezer tip and the second tweezer tip extend out. When the third control element is subjected to the second thrust, it drives the bipolar telescopic mechanism to move forward through the linkage crossbar. The reset spring is at the second compression amount, which is greater than the first compression amount. The free end of the arc-shaped protrusion of the spring piece exits from the first annular groove. When the third control element is no longer subjected to the second thrust, the reset spring resets, and the third control element moves backward through the linkage crossbar until the free end of the arc-shaped protrusion of the spring is engaged in the second annular groove, and the first and second tweezer tips retract.

5. The bipolar electrocoagulation tweezers as described in claim 2, characterized in that, The lengths of the first and second tweezer tips are 10mm to 12mm, the length of the slide is 150mm to 220mm, and the length of the T-shaped sliding rod is 20mm to 30mm.

6. The bipolar electrocoagulation forceps as described in claim 1, characterized in that, The inlet of the second channel is located on the front wall of the second tweezers body. When the second tweezers tip is fully extended, the horizontal distance between the inlet of the second channel and the front end of the second tweezers tip is greater than 12mm.

7. The bipolar electrocoagulation forceps as described in claim 1, characterized in that, The first control element is connected to a flow-grade switching valve, which controls the on / off state of the first channel and the switching of flow modes. The flow modes include at least a dripping mode and a rinsing mode. The flow-grade switching valve includes at least a first flow passage and a second flow passage. When the first control element drives the flow-grade switching valve to the dripping mode, the inlet and outlet of the first channel are connected to the first flow passage, and the first channel delivers liquid at a set flow rate of 0.05 ml / min to 0.3 ml / min to achieve the dripping function. When the first control element drives the flow-grade switching valve to the rinsing mode, the inlet and outlet of the first channel are connected to the second flow passage, and the first channel delivers liquid at a set flow rate of 0.3 ml / min to 5 ml / min to achieve the rinsing function.

8. The bipolar electrocoagulation forceps as described in claim 4, characterized in that, The third control element includes an electrocoagulation control unit, the circuit of which is electrically connected to the first and second tweezer tips via a conductive core. The third control element is connected to a sleeve, which is fitted onto the rear end of the linkage crossbar. When the third control element is rotated, the sleeve drives the free ends of the two arc-shaped protrusions to rotate within the first annular groove. The free ends of the two arc-shaped protrusions connect or disconnect with the contacts within the first annular groove, thus connecting or disconnecting the circuit.

9. The bipolar electrocoagulation forceps as described in claim 1, characterized in that, The inner side of the inlet of the second channel is also equipped with a medical silicone anti-reflux valve.

10. The bipolar electrocoagulation forceps as described in claim 1, characterized in that, The electrode holder has an inlet of a first channel and an outlet of a second channel. The inlet of the first channel is used to connect to an external water inlet device, and the outlet of the second channel is used to connect to an external negative pressure device.

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