An electrosurgical resectoscope

Abstract

The application relates to the technical field of medical equipment, in particular to an electric resectoscope which comprises an outer sheath tube, an inner sheath tube and an elastic film, the outer sheath tube is sleeved outside the periphery of the inner sheath tube, the outer sheath tube and the inner sheath tube surround a backflow channel, a plurality of drainage through holes are formed in the tail end of the outer sheath tube, and perfusion liquid flows into the backflow channel through the drainage through holes; the tail end of the outer sheath tube is also provided with mounting holes, the mounting holes are arranged between the drainage through holes along the length direction of the outer sheath tube, and the elastic film is fixedly arranged in the mounting holes; when the perfusion liquid flows in the backflow channel, the perfusion liquid forces the elastic film to be deformed outward and protrude, so that the protruding elastic film is arranged on the periphery of the outer sheath tube. In the application, the protruding elastic film can support human tissues, a gap is arranged between the human tissues and the periphery wall of the outer sheath tube, the perfusion liquid can carry out tissue debris and blood accumulation from the operation area of a patient, the imaging quality of the endoscope is improved, and the electric resectoscope is convenient for cutting lesion tissues.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an electrosurgical resection endoscope. Background Technology

[0002] Electrosurgical resection is a medical device used in fields such as urology for minimally invasive cutting, hemostasis, and observation, and is widely used in endoscopic surgeries.

[0003] Transurethral resection of the prostate (TURP) is a surgical procedure in which a rigid resectoscope is inserted through the urethra into the patient's body. An endoscopic imaging system clearly visualizes the bladder, prostate, and other cavities, and the energy platform controls the on / off switching of the electrocautery blade to physically remove the diseased tissue. Typical surgical procedures using TURP include: transurethral resection of the prostate (TURP) for benign prostatic hyperplasia (BPH), transurethral resection of bladder tumors (TURBT) for bladder tumors, and endometrial polyp removal.

[0004] As described in Chinese Utility Model Patent CN219516511U (Sheath Structure and Electrosurgical Endoscope) and Chinese Invention Patent CN119367042A (An Electrosurgical Endoscope), an electrosurgical endoscope generally includes a working handle, an outer sheath, an inner sheath, an electrosurgical ring (electrosurgical blade), and an endoscope. The outer sheath and inner sheath are detachably mounted on the working handle. The outer sheath tube in the outer sheath is sleeved around the outer circumference of the inner sheath tube in the inner sheath. The electrosurgical ring and endoscope are located inside the inner sheath tube. The end of the outer sheath tube is provided with a drainage hole, and a return channel is provided between the outer sheath tube and the inner sheath tube.

[0005] The outer sheath has an inlet and an outlet for water. When performing surgery using an electroresection endoscope, the irrigation fluid (such as 5% mannitol solution, 5% glucose solution, etc.) enters the irrigation channel inside the electroresection endoscope through the inlet on the outer sheath and finally flows out from the end of the endoscope to form a "surgical cavity" in the bladder or prostate. The irrigation fluid fills the cavity, allowing the mucosa and lesion tissue to fully unfold, providing a clear field of view for endoscopic imaging and providing operating space for the electroresection blade to cut the lesion tissue.

[0006] Once the perfusion fluid in the "operating cavity" reaches a certain volume, the perfusion fluid, mixed with tissue debris, blood, and other impurities, flows through the drainage hole at the end of the outer sheath into the return channel between the outer and inner sheaths, and finally exits from the drain port of the outer sheath.

[0007] However, during the above-mentioned procedures, the drainage hole at the end of the outer sheath can easily be blocked by human tissue, which can affect the return of the irrigation fluid mixed with tissue debris, blood and other impurities, thereby affecting the imaging of the endoscope and increasing the difficulty and risk of the surgery. Utility Model Content

[0008] To facilitate the return of contaminated irrigation fluid and to facilitate the removal of lesions by electroresection, this application provides an electroresection scope.

[0009] This application provides an electrosurgical resection microscope, which adopts the following technical solution: An electrosurgical resection device includes an outer sheath, an inner sheath, and an elastic membrane. The outer sheath is fitted around the outer periphery of the inner sheath, and a gap is provided between the outer and inner sheaths. The outer and inner sheaths form a return channel. The end of the outer sheath has several drainage holes through which the perfusion fluid flows into the return channel. The end of the outer sheath also has mounting holes, which are located between the drainage holes along the length of the outer sheath. The elastic membrane is fixed in the mounting holes. When the perfusion fluid flows in the return channel, the perfusion fluid forces the elastic membrane to bulge outward, causing the elastic membrane to protrude beyond the outer periphery of the outer sheath.

[0010] By adopting the above technical solution, the protruding elastic membrane supports the human tissue, creating a clearance gap between the human tissue and the outer peripheral wall of the outer sheath. This facilitates the flow of the irrigation fluid through the drainage hole on the outer sheath into the return channel between the outer and inner sheaths, allowing the irrigation fluid to carry tissue debris and blood out of the patient's surgical area, improving the imaging quality of the endoscope and facilitating the cutting of diseased tissue by the electrosurgical resection ring.

[0011] Optionally, the elastic membrane is fixed to the side of the mounting hole away from the inner sheath, and the elastic membrane is flush with the outer peripheral wall of the outer sheath.

[0012] By adopting the above technical solution, the elastic membrane is flush with the outer side of the mounting hole, which facilitates the insertion of the outer sheath into the human urethra and reduces damage to the surrounding tissues of the urethra.

[0013] Optionally, the mounting hole is a tapered hole, and the cross-sectional area of ​​the mounting hole decreases along the direction from the inner sheath to the outer sheath.

[0014] By adopting the above technical solution, the inclined sidewall of the mounting hole facilitates the flow of the injection fluid to the elastic membrane and promotes the bulging deformation of the elastic membrane.

[0015] Optionally, the elastic membrane is provided with a deformation annular groove on the side near the inner sheath tube, and a clearance distance is provided between the deformation annular groove and the sidewall of the mounting hole.

[0016] By adopting the above technical solution, when the injection fluid flows in the return channel, the elastic membrane is more easily deformed at the deformation groove, thereby increasing the degree of deformation and protrusion of the elastic membrane.

[0017] Optionally, the area of ​​the mounting hole cross-section is larger than the area of ​​the guide hole cross-section.

[0018] By adopting the above technical solution, it is beneficial to increase the force of the injection fluid on the elastic membrane, so as to facilitate the bulging deformation of the elastic membrane.

[0019] Optionally, along the circumferential direction of the outer sheath, a plurality of drainage holes are provided at annular intervals, and a plurality of mounting holes are provided at annular intervals; in the annular direction, the number of drainage holes is greater than the number of mounting holes.

[0020] By adopting the above technical solution, it is beneficial to increase the force of the injection fluid on the elastic membrane, so as to facilitate the bulging deformation of the elastic membrane.

[0021] Optionally, the mounting hole is arranged in a spiral shape along the length of the outer sheath.

[0022] By adopting the above technical solution, the mounting holes are arranged in a spiral shape, which can effectively separate human tissue from the outer sheath.

[0023] Optionally, the mounting hole is an oblong hole, and the long axis of the mounting hole is perpendicular to the axis of the outer sheath.

[0024] By adopting the above technical solution, the mounting hole is a waist-shaped hole, and the elastic membrane is also set in a long strip shape; thus, the raised elastic membrane has a blocking effect on the irrigation fluid in the surgical area, which is conducive to the irrigation fluid passing through the drainage hole.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The raised elastic membrane supports the human tissue, creating a clearance between the human tissue and the outer wall of the outer sheath. This allows the perfusion fluid to flow through the drainage holes on the outer sheath into the return channel between the outer and inner sheaths, enabling the perfusion fluid to carry tissue debris and blood out of the patient's surgical area, improving the imaging quality of the endoscope and facilitating the cutting of diseased tissue by the electrosurgical resection ring. 2. When the injection fluid flows in the return channel, the elastic membrane is more easily deformed at the deformation groove, which can increase the degree of deformation and protrusion of the elastic membrane; 3. The mounting hole is a waist-shaped hole, and the elastic membrane is also elongated; thus, the raised elastic membrane has a blocking effect on the irrigation fluid in the surgical area, which facilitates the irrigation fluid to pass through the drainage hole. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the electrosurgical resection mirror in Example 1.

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0028] Figure 3This is a schematic diagram of the end of the electrosurgical resection mirror in Example 1.

[0029] Figure 4 This is a schematic diagram of the structure of the outer sheath in the first state in Example 1.

[0030] Figure 5 This is a schematic diagram of the second state of the outer sheath in Example 1.

[0031] Figure 6 This is a schematic diagram of the elastic membrane in Example 2.

[0032] Figure 7 This is a schematic diagram of the elastic membrane in Example 3.

[0033] Explanation of reference numerals in the attached drawings: 1. Working handle; 2. Outer sheath; 21. Outer sheath tube; 211. Drainage hole; 212. Mounting hole; 22. Water inlet; 23. Water outlet; 3. Inner sheath; 31. Inner sheath tube; 4. Electrosurgical cutter ring; 5. Endoscope; 6. Return channel; 7. Elastic membrane; 71. Deformation ring groove. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 Section 7 provides further details regarding this application.

[0035] This application discloses an electrosurgical resection mirror. (Refer to...) Figures 1 to 3 The electrosurgical resection endoscope includes a working handle 1, an outer sheath 2, an inner sheath 3, an electrosurgical ring 4, and an endoscope 5. The outer sheath 2 and the inner sheath 3 are detachably mounted on the working handle 1. The outer sheath 2 includes an outer sheath tube 21, and the inner sheath 3 includes an inner sheath tube 31. The outer sheath tube 21 is sleeved around the outer periphery of the inner sheath tube 31. The outer sheath tube 21 and the inner sheath tube 31 together form the sheath of the electrosurgical resection endoscope, and a gap is provided between the outer sheath tube 21 and the inner sheath tube 31, forming a reflux channel 6 for liquid flow.

[0036] Reference Figure 2 and Figure 3 The resection ring 4 and endoscope 5 are housed within the inner sheath 31. During transurethral resection, the endoscope sheath is inserted through the urethra into the patient's body (bladder or prostate, etc.), thereby advancing the resection ring 4 and endoscope 5 into the cavities of the bladder, prostate, or other tissues. The endoscope 5 transmits images of the surgical area to a monitor for clear visualization of the intracavitary tissues. The resection ring 4 has a metal ring electrode, and the resection blade is connected to a high-frequency generator, enabling the resection ring 4 to cut the diseased tissue.

[0037] Reference Figure 1The outer sheath 2 is provided with an inlet 22 and an outlet 23, and the end of the outer sheath tube 21 is provided with a drainage hole 211. The irrigation fluid (such as 5% mannitol solution, 5% glucose solution, etc.) enters the irrigation channel inside the electroresection endoscope through the inlet 22 on the outer sheath 2, and finally flows out from the end of the electroresection endoscope to form a "surgical cavity" in the bladder or prostate; the irrigation fluid fills the cavity, allowing the mucosa and lesion tissue to fully unfold, providing a clear field of view for imaging of the endoscope 5, and providing operating space for the electroresection knife to cut the lesion tissue.

[0038] In the prior art, electrosurgical resectoscopes are widely used, and the mounting structure of the outer sheath 2, inner sheath 3, electrosurgical ring 4, and endoscope 5 is not the main inventive point of this application. Therefore, this application will not elaborate on the specific structure of the electrosurgical resectoscope. The main inventive point of this application lies in the outer sheath tube 21, and this application will provide a detailed description of the specific structure of the outer sheath tube 21.

[0039] Reference Figure 2 and Figure 3 The outer sheath tube 21 also has a mounting hole 212 at its end, which is located between the drainage holes 211 along the length of the outer sheath tube 21. In this embodiment, the electrosurgical resection mirror also includes an elastic membrane 7, which is fixed in the mounting hole 212.

[0040] Reference Figure 4 and Figure 5 In this embodiment, the mounting hole 212 is a tapered hole, and the cross-sectional area of ​​the mounting hole 212 decreases along the direction from the inner sheath 31 to the outer sheath 21. Therefore, when the perfusion fluid flows in the return channel 6, the inclined sidewall of the mounting hole 212 facilitates the flow of the perfusion fluid towards the elastic membrane 7, and promotes the bulging deformation of the elastic membrane 7. Furthermore, the elastic membrane 7 is fixed to the side of the mounting hole 212 away from the inner sheath 31, and is flush with the outer peripheral wall of the outer sheath 21. The flush arrangement of the elastic membrane 7 with the outer side of the mounting hole 212 facilitates the insertion of the outer sheath 21 into the human urethra, reducing damage to the surrounding tissues of the urethra.

[0041] Reference Figure 3 Along the circumferential direction of the outer sheath 21, several drainage holes 211 and several mounting holes 212 are arranged annularly at intervals. In the annular direction, the number of drainage holes 211 is greater than the number of mounting holes 212. Therefore, when the injection fluid flows through the return channel 6 between the outer sheath 21 and the inner sheath 31, it is beneficial to increase the force of the injection fluid on the elastic membrane 7, thus facilitating the bulging deformation of the elastic membrane 7. Furthermore, the cross-sectional area of ​​the mounting holes 212 is greater than the cross-sectional area of ​​the drainage holes 211; this is also beneficial to increasing the force of the injection fluid on the elastic membrane 7, thus facilitating the bulging deformation of the elastic membrane 7.

[0042] The implementation principle of an electrosurgical resection microscope in this application embodiment is as follows: Reference Figure 4 and Figure 5 When the perfusion fluid flows within the return channel 6, it forces the elastic membrane 7 to bulge outward, causing it to protrude beyond the outer periphery of the outer sheath 21. The protruding elastic membrane 7 supports the human tissue, creating a clearance between the tissue and the outer wall of the outer sheath 21. This facilitates the flow of the perfusion fluid through the drainage hole 211 on the outer sheath 21 into the return channel 6 between the outer sheath 21 and the inner sheath 31. This allows the perfusion fluid to carry tissue debris and accumulated blood out of the patient's surgical area, improving the imaging quality of the endoscope 5 and facilitating the cutting of diseased tissue by the electrosurgical resection ring 4.

[0043] Example 2 The difference between Example 2 and Example 1 is as follows: Reference Figure 6 The elastic membrane 7 is provided with a deformation annular groove 71 on the side near the inner sheath tube 31, and a clearance distance is provided between the deformation annular groove 71 and the side wall of the mounting hole 212.

[0044] The implementation principle of an electrosurgical resection microscope in this application embodiment is as follows: Reference Figure 6 When the infusion fluid flows in the return channel 6, the elastic membrane 7 is more easily deformed at the deformation groove, which can increase the degree of deformation and protrusion of the elastic membrane 7, thereby increasing the distance between the human tissue and the outer sheath 21, which is conducive to the infusion fluid in the surgical area passing through the drainage hole 211 and returning.

[0045] Example 3 The difference between Example 3 and Example 1 is as follows: Reference Figure 7 In this embodiment, the mounting hole 212 is an oblong hole, and its long axis is perpendicular to the axis of the outer sheath 21. Furthermore, the mounting hole 212 is spirally arranged along the length of the outer sheath 21.

[0046] The implementation principle of an electrosurgical resection microscope in this application embodiment is as follows: Reference Figure 7 The mounting hole 212 is a waist-shaped hole, and the elastic membrane 7 is also elongated. This allows the protruding elastic membrane 7 to block the irrigation fluid in the surgical area, facilitating the passage of the irrigation fluid through the drainage hole 211. The mounting hole 212 is spirally arranged, which can effectively separate human tissue from the outer sheath 21.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electrosurgical resection microscope, characterized in that: The device includes an outer sheath (21), an inner sheath (31), and an elastic membrane (7). The outer sheath (21) is fitted around the outer periphery of the inner sheath (31), and there is a gap between the outer sheath (21) and the inner sheath (31). The outer sheath (21) and the inner sheath (31) form a return channel (6). Several drainage holes (211) are opened at the end of the outer sheath (21), and the infusion fluid flows into the return channel (6) through the drainage holes (211). Inside; the end of the outer sheath (21) is also provided with an installation hole (212). Along the length direction of the outer sheath (21), the installation hole (212) is located between the drainage holes (211), and the elastic membrane (7) is fixed in the installation hole (212). When the injection fluid flows in the return channel (6), the injection fluid forces the elastic membrane (7) to bulge outward and deform, so that the elastic membrane (7) protrudes from the outer peripheral surface of the outer sheath (21).

2. The electrosurgical resection mirror according to claim 1, characterized in that: The elastic membrane (7) is fixed on the side of the mounting hole (212) away from the inner sheath (31), and the elastic membrane (7) is flush with the outer peripheral wall of the outer sheath (21).

3. The electrosurgical resection mirror according to claim 2, characterized in that: The mounting hole (212) is a tapered hole, and the area of ​​the cross-section of the mounting hole (212) decreases along the direction from the inner sheath (31) to the outer sheath (21).

4. The electrosurgical resection mirror according to claim 1, characterized in that: The elastic membrane (7) has a deformation annular groove (71) on the side near the inner sheath tube (31), and there is a clearance distance between the deformation annular groove (71) and the sidewall of the mounting hole (212).

5. The electrosurgical resection mirror according to claim 1, characterized in that: The elastic membrane (7) has a deformation annular groove (71) on the side near the inner sheath tube (31), and there is a clearance distance between the deformation annular groove (71) and the sidewall of the mounting hole (212).

6. The electrosurgical resection mirror according to claim 5, characterized in that: Along the circumferential direction of the outer sheath (21), there are a number of drainage holes (211) spaced in an annular pattern, and there are a number of mounting holes (212) spaced in an annular pattern; in the annular direction, the number of drainage holes (211) is greater than the number of mounting holes (212).

7. The electrosurgical resection mirror according to claim 6, characterized in that: Along the length of the outer sheath (21), the mounting hole (212) is arranged in a spiral shape.

8. The electrosurgical resection mirror according to claim 1, characterized in that: The mounting hole (212) is a waist-shaped hole, and the long axis of the mounting hole (212) is perpendicular to the axis of the outer sheath (21).

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