Puncture-free high-pressure injection mechanism based on urethrocystoscope

Abstract

The puncture-free high-pressure injection mechanism is used for assisting laser cutting of bladder tumors and comprises a high-pressure injector and a transurethral bladder injection needle, the urethrocystoscope is provided with an optical fiber channel, the injection needle is arranged in the optical fiber channel, one end of the injection needle is provided with a blunt liquid outlet head, and the other end of the injection needle is provided with a puncture needle. When injection liquid is sprayed out of the liquid outlet head, an auxiliary mechanism playing a supporting and cooling role is formed, and on one hand, the auxiliary mechanism enables a tumor to be separated from a substrate on the inner surface of the bladder so that the tumor can be cut conveniently; on the other hand, the situation that the pathological tissue is carbonized due to the fact that the cutting temperature is too high in the tumor cutting process can be avoided, and the complete pathological tissue without heat damage can be conveniently obtained.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, and in particular to a puncture-free high-pressure injection mechanism based on a urethral cystoscope. Background Art

[0002] Bladder tumors refer to tumors that occur in the bladder. Bladder tumors can be divided into two categories: epithelial and non-epithelial tumors, which can be benign or malignant. Tumors of bladder epithelial origin include urothelial carcinoma, squamous cell carcinoma, and adenocarcinoma, accounting for more than 9% of all tumors. Non-epithelial bladder tumors include fibroma, leiomyoma, hemangioma, pheochromocytoma, etc., as well as rhabdomyosarcoma, chondroma, dermoid cysts, etc. that occur in ectopic tissues outside the bladder, which are extremely rare.

[0003] In the prior art, bladder tumors are generally cut by laser cutting devices. During the laser cutting process, the surrounding tissues are often carbonized due to the high cutting temperature (over 100°C), which makes it difficult to obtain a complete pathology. At the same time, during the laser cutting process, bleeding will also affect the surgical field, thereby affecting the actual surgical effect. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a puncture-free high-pressure injection mechanism based on urethral cystoscopy.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A puncture-free high-pressure injection mechanism based on a urethral cystoscope is used to assist laser cutting of bladder tumors, including a high-pressure injector and a transurethral bladder injection needle. The urethral cystoscope has an optical fiber channel, and the injection needle is arranged in the optical fiber channel. One end of the injection needle is provided with a blunt liquid outlet head, and the other end is connected to the high-pressure injector as a liquid inlet end. When the injection liquid is sprayed from the liquid outlet head, an auxiliary mechanism that supports and cools the tumor is formed inside the tumor. On the one hand, the auxiliary mechanism separates the tumor from the substrate on the inner surface of the bladder to facilitate cutting of the tumor. On the other hand, it can avoid the situation where the cutting temperature is too high and carbonization of the pathological tissue occurs during cutting of the tumor, so as to facilitate obtaining complete pathological tissue.

[0007] Preferably, it also includes an adjustment mechanism for adjusting the spray angle of the liquid outlet head so that the liquid outlet head can be accurately positioned at a predetermined point on the mucosa. Specifically, the adjustment mechanism includes an adjustment rope tied to the liquid outlet head and a corrugated cylinder for connecting the injection needle and the liquid outlet head, and a limiting sleeve that can move in the optical fiber channel and is mounted on the end of the injection needle close to the liquid outlet head. The interior of the optical fiber channel has a positioning ring for the injection needle to pass through, and the interior of the optical fiber channel is located from the positioning ring to the position close to the end of the liquid outlet head to form an assembly cavity, the limiting sleeve is placed in the assembly cavity and is movable, and the end of the adjustment rope away from the liquid outlet head passes through the limiting sleeve and the positioning ring in sequence and then extends from the end of the optical fiber channel away from the liquid outlet head.

[0008] Preferably, the injection needle, the liquid outlet head and the bellows are integrally formed.

[0009] Preferably, when the limiting sleeve abuts against the positioning ring, the liquid outlet head and the corrugated cylinder are both located outside the optical fiber channel.

[0010] Preferably, the inner wall of the liquid outlet head has a spiral groove to guide the injection liquid to form a straight line after being ejected from the liquid outlet head.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention cooperates the injection needle with the optical fiber channel of the urethral cystoscope. During the tumor cutting process, the injection liquid is discharged through the high-pressure syringe connected to the injection needle and pressed into the submucosal layer to form an auxiliary mechanism under the tumor. On the one hand, the auxiliary mechanism separates the tumor from the base on the inner surface of the bladder to facilitate the cutting of the tumor. On the other hand, during the cutting of the tumor, it can avoid the situation where the cutting temperature is too high to cause carbonization of the pathological tissue, thereby facilitating the acquisition of complete pathological tissue without thermal damage.

[0013] 2. The auxiliary mechanism is composed of an injection needle combined with a high-pressure syringe to discharge the injection liquid and press it into the submucosal layer to form a water bag in the tumor. The entire process of water bag formation does not require the injection needle to actively puncture the mucosa, thereby achieving puncture-free injection and reducing the risk of bleeding.

[0014] 3. By setting the adjustment mechanism, the liquid outlet direction of the liquid outlet head can be accurately adjusted, so that the liquid outlet end of the injection needle can be accurately positioned to the target point under the mucosa, which is more conducive to the smooth progress of treatment.

[0015] 4. The shape of the liquid outlet of the injection needle is optimized to be blunt, thereby preventing the injection needle from piercing the inner surface of the bladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the liquid discharge head of the present invention.

[0018] Figure symbols: 1. high-pressure syringe, 2. injection needle, 3. optical fiber channel, 31. positioning ring, 32. assembly cavity, 4. liquid outlet head, 5. adjustment mechanism, 51. adjustment rope, 52. bellows, 53. limiting sleeve, 41. spiral groove. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0020] Example 1

[0021] like Figure 1 The puncture-free high-pressure injection mechanism based on urethral cystoscope is shown, which is used to assist laser cutting of bladder tumors, including a high-pressure injector 1 and a transurethral bladder injection needle 2. The urethral cystoscope has an optical fiber channel 3, and the injection needle 2 is arranged in the optical fiber channel 3. One end of the injection needle 2 is connected to the high-pressure injector 1, and the other end is provided with a blunt liquid outlet 4. When the bladder tumor is cut by laser, the injection liquid is ejected from the liquid outlet 4 to form an auxiliary mechanism inside the tumor for supporting and cooling. Specifically, the auxiliary mechanism is composed of a water bag formed by the injection needle 2 and the high-pressure injector 1 to discharge the injection liquid and press it into the tumor where the submucosal layer is located. The entire formation process of the water bag does not require the injection needle 2 to actively puncture the mucosa, thereby realizing puncture-free injection. On the one hand, the auxiliary mechanism separates the tumor from the substrate on the inner surface of the bladder to facilitate cutting of the tumor. On the other hand, during the process of cutting the tumor, it can avoid the situation where the cutting temperature is too high and the pathological tissue is carbonized, which is convenient for obtaining complete pathological tissue without thermal damage, which is conducive to accurate pathological analysis and accurate treatment of tumors.

[0022] As a preferred solution of the above embodiment, it also includes an adjustment mechanism 5 for adjusting the spray angle of the liquid outlet head 4. The adjustment mechanism 5 is set so that the liquid outlet end 4 of the injection needle 2 can be accurately positioned at the predetermined target point under the mucosa, which is more conducive to the smooth progress of the treatment. Specifically, the adjustment mechanism 5 includes an adjustment rope 51 tied to the liquid outlet head 21 and a corrugated cylinder 52 for connecting the injection needle 2 and the liquid outlet head 4, and a limiting sleeve 53 that can move in the optical fiber channel 3 and is sleeved on the end of the injection needle 2 close to the liquid outlet head 4. The interior of the optical fiber channel 3 has a positioning ring 31 for the injection needle 2 to pass through, and the interior of the optical fiber channel 3 is located from the positioning ring 31 to the end close to the liquid outlet head 4. An assembly cavity 32 is formed in the part, and a limiting sleeve 53 is placed in the assembly cavity 32 and is movable. The end of the adjusting rope 51 away from the liquid outlet head 4 passes through the limiting sleeve 53 and the positioning ring 31 in sequence and then extends from the end of the optical fiber channel 3 away from the liquid outlet head 4. When the adjusting rope 51 is pulled, the force exerted on the liquid outlet head 4 is transmitted to the bellows 52. At this time, the bellows 52 is deformed by the force, so that the liquid outlet direction of the liquid outlet head 4 changes. After the bellows 52 is deformed by the force, it will also be affected by the potential energy of the injection liquid flowing through the bellows 52, so that the bellows 52 is always in a trend of recovering to the state before deformation. Therefore, the purpose of adjusting the liquid spraying angle of the liquid outlet head 4 can be achieved by moving the adjusting rope 51.

[0023] As a preferred solution of the above embodiment, the injection needle 2, the liquid outlet head 4 and the bellows 52 are integrally formed.

[0024] As a preferred solution of the above embodiment, when the limiting sleeve 53 abuts against the positioning ring 31 , the liquid outlet head 4 and the corrugated cylinder 52 are both located outside the optical fiber channel 3 .

[0025] As a preferred solution of the above embodiment, the length of the injection needle 2 is 30 cm.

[0026] As a preferred solution of the above embodiment, Figure 2 As shown, the inner wall of the liquid outlet head 4 has a spiral groove 41, which guides the injection liquid to be ejected from the liquid outlet head 4 in a straight line to reduce pressure loss.

[0027] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A puncture-free high-pressure injection mechanism based on urethral cystoscopy, characterized in that: The invention is used for assisting laser cutting of bladder tumors, comprising a high-pressure injector (1) and a transurethral bladder injection needle (2); the urethral cystoscope has an optical fiber channel (3); the injection needle (2) is arranged in the optical fiber channel (3); one end of the injection needle (2) is provided with a blunt liquid outlet head (4); the other end is connected to the high-pressure injector as a liquid inlet end; when the injection liquid is ejected from the liquid outlet head (4), an auxiliary mechanism having a supporting and cooling effect is formed inside the tumor.

2. The puncture-free high-pressure injection mechanism based on urethral cystoscopy according to claim 1 is characterized in that: It also includes an adjustment mechanism (5) for adjusting the liquid spraying angle of the liquid outlet head (4).

3. The non-puncture high-pressure injection mechanism based on urethral cystoscope according to claim 2 is characterized in that: The adjustment mechanism (5) comprises an adjustment rope (51) tied to the liquid outlet head (21), a corrugated tube (52) for connecting the injection needle (2) and the liquid outlet head (4), and a limiting sleeve (53) which can move in the optical fiber channel (3) and is sleeved on one end of the injection needle (2) close to the liquid outlet head (4). The optical fiber channel (3) has a positioning ring (31) inside for the injection needle (2) to pass through, and the optical fiber channel (3) forms an assembly cavity (32) from the positioning ring (31) to the end close to the liquid outlet head (4). The limiting sleeve (53) is placed in the assembly cavity (32) and is movable. The end of the adjustment rope (51) away from the liquid outlet head (4) passes through the limiting sleeve (53) and the positioning ring (31) in sequence, and then extends out from the end of the optical fiber channel (3) away from the liquid outlet head (4).

4. The non-puncture high-pressure injection mechanism based on urethral cystoscope according to claim 3, characterized in that: The injection needle (2), the liquid outlet head (4) and the corrugated cylinder (52) are integrally formed.

5. The non-puncture high-pressure injection mechanism based on urethral cystoscope according to any one of claims 3-4, characterized in that: When the limiting sleeve (53) abuts against the positioning ring (31), the liquid outlet head (4) and the corrugated cylinder (52) are both located outside the optical fiber channel (3).

6. The non-puncture high-pressure injection mechanism based on urethral cystoscope according to claim 5, characterized in that: The inner wall of the liquid outlet head (4) is provided with a spiral groove (41).

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