Small-caliber laser resection mirror and use method thereof

Abstract

The invention relates to a small-caliber laser resection mirror and a using method thereof. The small-caliber laser resection mirror comprises an inner sheath, an endoscope, an optical fiber pipeline, an operator and a connector. The endoscope and the optical fiber pipeline are arranged in the inner sheath in a penetrating manner; the operator is arranged at one end of the inner sheath and used for controlling the optical fiber pipeline to stretch out and draw back in the inner sheath. The end, away from the operator, of the inner sheath is closed, and a backflow hole is formed in the side wall of the end, away from the operator, of the inner sheath. According to the small-caliber laser resection mirror, the whole design thought is changed, the brand-new laser resection mirror structure capable of keeping the original function of the resection mirror unchanged and reducing the caliber is provided, the outer sheath is innovatively removed, the optical fiber channel is combined with the water injection function, meanwhile, the inner sheath serves as the outermost layer of the whole new resection mirror structure, and therefore the whole resection mirror structure is more compact. The interior of the inner sheath is used for draining water, so that a stable water inlet and outlet system is constructed, and finally, the caliber of the laser resection mirror extending into the urethra can reach Fr18-Fr24.

Description

Technical Field

[0001] The present invention relates to the technical field of laser resection mirrors, and in particular to a small-caliber laser resection mirror and a use method thereof. Background Art

[0002] Prostate hyperplasia surgery is mainly performed through a transurethral prostate laser resection scope. The standard caliber transurethral prostate laser resection scope on the market is Fr26, which is not completely suitable for the thin urethra of some Chinese people. The components of the urethral prostate laser resection scope generally include an inner sheath, an outer sheath, an endoscope, a manipulator, an obturator, etc. As of now, there are Fr24 and even Fr20 small-caliber prostate laser resection scopes on the market. However, there are still some unresolved problems: ① The surgical insertion problem of some patients with small urethra, urethral stenosis or pediatric urethra cannot be solved; ② The main structure of the traditional resection scope has not changed, but the purpose of reducing the caliber is achieved simply by reducing the precision and sheath thickness. As the caliber becomes thinner, the caliber of the inner and outer sheaths of the laser resection scope and the matching eyepiece must be reduced accordingly, resulting in a decrease in the overall support and strength of the laser resection scope, which is easy to deform or even break. Summary of the invention

[0003] Based on this, it is necessary to provide a small-caliber laser resection scope and a method of using the same to address the problem that the caliber of the existing urethral prostate laser resection scope is difficult to reduce and reducing the caliber will lead to a decrease in the strength of the resection scope.

[0004] A small-caliber laser resection scope comprises an inner sheath, an endoscope, an optical fiber pipeline, an operator and a joint; the endoscope and the optical fiber pipeline are both inserted into the inner sheath; the operator is arranged at one end of the inner sheath and is used to control the expansion and contraction of the optical fiber pipeline in the inner sheath;

[0005] The inner sheath is closed at one end away from the operator, and a reflux hole is provided on the side wall of the inner sheath at one end away from the operator;

[0006] The optical fiber pipeline is used for passing optical fibers, and is also used for injecting water when in use;

[0007] The connector is arranged at one end of the optical fiber pipeline close to the operator; the connector includes two inlets both connected to the optical fiber pipeline; one of the inlets is used to insert the optical fiber into the optical fiber pipeline, and the other inlet is used to inject water into the optical fiber pipeline.

[0008] As a preferred example, the joint includes a tee, a hose and a locker; one end of the tee is connected to the optical fiber pipeline; the other end of the tee is used to connect to an external water source; the remaining end of the tee is connected to the hose; the hose is used to insert the optical fiber into the optical fiber pipeline; the locker is arranged on the tee, and is used to apply a force to the hose in the direction of the optical fiber, so that a seal is set between the hose and the optical fiber.

[0009] As a preferred example, the locking device comprises:

[0010] An insert is sleeved on the hose; one end of the insert is provided with a slope;

[0011] Two threaded rings; one of the rings is fixedly sleeved on the tee, and the other ring is sleeved on the insert, and its inner wall abuts against the inclined surface on the insert; when the two rings approach or move away from each other, the rings squeeze the inclined surface to make the insert deform toward the hose, so that the hose and the optical fiber are sealed.

[0012] As a preferred example, the hose and the optical fiber pipe are coaxially arranged.

[0013] As a preferred example, the three-way pipe is provided with a valve for controlling the on-off of the external water source.

[0014] As a preferred example, the three-way pipe is detachably connected to the optical fiber pipeline.

[0015] As a preferred example, the connector includes a tee; one end of the tee is connected to the optical fiber pipeline; the other end of the tee is used to connect to an external water source; and the remaining end of the tee is used to insert the optical fiber into the optical fiber pipeline.

[0016] As a preferred example, a plurality of the reflux holes are provided and are evenly distributed circumferentially on the inner sheath.

[0017] As a preferred example, water is injected into the optical fiber pipeline by pressurized water injection.

[0018] A method for using a small-caliber laser resection mirror, which uses the small-caliber laser resection mirror as described above; the method for using comprises the following steps:

[0019] External flushing water enters the human body through the joint and optical fiber pipe; the flushing water inside the human body is discharged from the human body through the reflux hole and the inner sheath, thus forming a dynamic circulation of flushing water.

[0020] The beneficial effects of the present invention are:

[0021] 1. The small-caliber laser resection mirror proposed in the present invention changes the overall design concept and proposes a new laser resection mirror structure that can maintain the original function of the resection mirror and reduce the caliber. The outer sheath is innovatively removed, and the fiber channel is combined with the water injection function. At the same time, the inner sheath is used as the outermost layer of the entire new resection mirror structure, and the inner sheath is used for drainage, thereby constructing a stable water inlet and outlet system, further reducing the caliber of the resection mirror, and finally making the caliber of the laser resection mirror inserted into the urethra reach Fr18~Fr24, thereby achieving the required small caliber.

[0022] 2. The laser resection mirror proposed in the present invention can be composed of original components with sufficient supporting force and strength through a new structural improvement, rather than reducing the caliber by reducing the thickness and diameter of the components. Therefore, while reducing the diameter of the laser resection mirror, the mirror body still has sufficient supporting force and strength and is not prone to deformation and breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a partial structural schematic diagram of the front end of the inner sheath in the embodiment;

[0024] Figure 2 It is a structural schematic diagram of the connection between the manipulator, the inner sheath and the connector;

[0025] Figure 3 It is a schematic diagram of the structure of the locking device.

[0026] In the figure: inner sheath 1, endoscope 2, optical fiber tube 3, manipulator 4, connector 5, tee pipe 6, hose 7, insert 8, and collar 9. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0031] This embodiment provides a small-caliber laser resection scope, the main body of which only includes an inner sheath 1, an endoscope 2, an optical fiber tube 3, an operator 4 and a connector 5. Obviously, compared with a traditional resection scope, the small-caliber laser resection scope first removes the outer sheath design, which can at least reduce the resection scope diameter by 2 Fr units. Figure 1 As shown, the inner sheath 1 can be made of materials such as stainless steel and titanium alloy, and has good bio-tissue compatibility while ensuring its own strength. At the same time, the inner sheath 1 is set as a hard straight tube style, and one end of the inner sheath 1 is closed and set as one end extending into the human body, and a plurality of reflux holes are provided on the side wall of the closed end. A plurality of reflux holes are evenly distributed on the inner sheath 1 in the circumferential direction to increase the water inlet speed of the reflux holes. The end of the inner sheath 1 away from the reflux holes is provided with a corresponding reflux interface and a valve for discharging the water refluxed in the inner sheath 1. The endoscope 2 and the optical fiber pipeline 3 are both arranged inside the inner sheath 1. The operator 4 is arranged at one end of the inner sheath 1 away from the reflux holes, that is, the operator 4 is at one end of the inner sheath 1 outside the human body during the operation, and it is used to control the telescopic process of the optical fiber pipeline 3 inside the inner sheath 1. It is well known to those skilled in the art that the endoscope 2 is a commonly used structure on the resection scope. The endoscope 2 is used to observe the lesion site and monitor the operation. It can adopt a conventional medical endoscope 2, which can be classified into a rigid tube endoscope, an optical fiber (hose 7 type) endoscope and an electronic endoscope according to the imaging structure.

[0032] like Figure 2As shown, the operator 4 includes a connecting tube, a handle, a slider, a reset assembly and other parts. The connecting tube is partially inserted into the inner sheath 1, so that the operator 4 is connected to the inner sheath 1, and the endoscope 2 passes through the connecting tube and enters the inner sheath 1. The slider is slidably arranged on the outer side of the connecting tube, and the slider is fixed to the optical fiber pipe 3. The handle is connected to the slider to drive the slider to slide on the connecting tube. The reset assembly generally includes a spring. Through the elasticity of the spring and the operator pressing the handle, the slider can move back and forth, thereby driving the optical fiber pipe 3 to expand and contract in the inner sheath 1 to achieve laser resection of the lesion. In the prior art, the function of the optical fiber pipe 3 is only to pass the optical fiber. One end of the optical fiber is connected to the light source, and the other end extends to the end of the optical fiber pipe 3 located in the human body, and the laser energy is transmitted through the optical fiber. The circulating water system is a must for the laser resection mirror and is also an important factor limiting the caliber of the resection mirror. In the existing laser resection mirror design, water is injected through the internal space of the inner sheath and water is discharged through the space between the inner sheath and the outer sheath. It is a very mature solution and has been used. This solution creatively combines the water injection function into the optical fiber channel to replace the water injection channel of the traditional resection mirror. The water injection of the optical fiber channel and the water return inside the inner sheath 1 form a complete water cycle, breaking through the thinking inertia of the traditional resection mirror design (that is, simply reducing the precision and the thickness of the sheath to achieve the purpose of reducing the caliber), and can reduce the caliber of the laser resection mirror (the caliber of the laser resection mirror can reach Fr18~Fr24), while not reducing the original function, so that the overall resection mirror still has strong support and strength.

[0033] Specifically, the structure design of the fiber channel incorporating the water injection function in this embodiment is as follows: Figure 3As shown. A specially designed connector 5 is arranged at one end of the optical fiber pipeline 3 near the operator 4. The connector 5 includes a tee 6, a hose 7 and a locker. One end of the tee 6 is connected to the optical fiber pipeline 3. In this embodiment, the tee 6 is detachably connected to the end of the optical fiber pipeline 3, generally by a threaded connection, so that the disassembly and installation can be quickly realized. The other end of the tee 6 is used to connect to an external water source. A valve can be installed on the end connected to the external water source to control the on and off of the water inlet. It is worth mentioning that in order to ensure sufficient water inlet, the diameter of the optical fiber pipeline 3 in this design can be appropriately enlarged compared with the existing optical fiber pipeline 3. Compared with the inner sheath 1, the diameter of the optical fiber pipeline 3 itself is much smaller, generally about Fr2 to Fr6, and the internal space of the inner sheath 1 itself has an appropriate surplus, because the optical fiber pipeline 3 can be appropriately enlarged to meet the water inlet demand, and the appropriately enlarged optical fiber pipeline 3 will not affect the size of the entire laser resection mirror in this solution. In another design, the external water source can also be set as a pressurized water source. The pressurized water is poured into the human body through the joint 5 and the optical fiber pipe 3, thereby ensuring sufficient water intake. The above two methods can be used either or in combination, and the ultimate goal is to ensure sufficient water intake during the operation. The remaining end of the tee pipe 6 is connected to the hose 7. The optical fiber is generally inserted into the optical fiber pipe 3 before the operation. To ensure the smooth installation of the optical fiber, the hose 7 is preferably installed in a direction coaxial with the optical fiber pipe 3. In order to prevent the water injected into the optical fiber pipe 3 from flowing out from the rear end of the optical fiber pipe 3 (that is, the end of the optical fiber pipe 3 close to the operator 4). The locker needs to be used in conjunction with the hose 7. In this embodiment, the locker includes an insert 8 and two threaded rings 9. The insert 8 is annular and is sleeved on the hose 7, and a bevel is provided at one end of the outer wall of the insert 8. The insert 8 itself has a certain elasticity, and a notch is provided on the annular insert 8, so that the insert 8 can be deformed more easily. One of the collars 9 is fixedly sleeved on the tee 6, and the other collar 9 is sleeved on the insert 8, and its inner wall is against the inclined surface on the insert 8. When the collar 9 sleeved on the insert 8 is rotated, the two collars 9 move away from or close to each other due to the thread action, so that the inner wall of the collar 9 squeezes the inclined surface on the insert 8 and then the insert 8 is deformed in the direction of the hose 7. The insert 8 is deformed and squeezed to the hose 7, so that the hose 7 and the periphery of the optical fiber are sealed, thereby preventing the trouble of water flowing out from the rear side of the optical fiber pipe 3. In addition to solving the problem of water flowing on the rear side of the optical fiber pipe 3, this design can also play a role in fixing the optical fiber in the optical fiber pipe 3. Specifically, the operator 4 is used to reciprocate and drive the optical fiber pipe 3 to expand and contract in the inner sheath 1, and water needs to be injected into the interior of the optical fiber pipe 3 in this scheme. In this way, during the repeated movement of the optical fiber pipe 3, the optical fiber inside it may easily slip relative to the optical fiber pipe 3, affecting the laser removal of the front end of the optical fiber pipe 3.The locking device designed in this embodiment can lock or clamp the optical fiber at the end of the optical fiber pipe 3 through the hose 7, thereby preventing the optical fiber and the optical fiber pipe 3 from sliding relative to each other.

[0034] In another embodiment, compared with the above embodiment, the joint 5 can be directly set as a tee 6. One end of the tee 6 is connected to the optical fiber pipeline 3, the other end is used to connect to the external water source, and the remaining end is used to insert the optical fiber into the optical fiber pipeline 3. This design can reduce the structural design of the rear end of the optical fiber pipeline 3 and facilitate operation. As for the water leakage problem at the rear end of the optical fiber pipeline 3, sealing methods such as sealing tape can be used to wrap the optical fiber and the optical fiber pipeline 3, and sealing fillers can be filled between the optical fiber and the optical fiber pipeline 3, which are not listed here one by one.

[0035] In summary, the traditional prostate laser resection mirror only reduces the total caliber by reducing the thickness and diameter of the components. The reduction of the total caliber is limited, and it is easy to cause the overall support force of the resection mirror to decrease, and it is easy to deform or even break, which has limitations. The small-caliber laser resection mirror proposed in the present invention changes the overall design concept and proposes a new laser resection mirror structure that can maintain the original function of the resection mirror and reduce the caliber. The outer sheath is innovatively removed, and the inner sheath 1 is used as the outermost layer of the entire new laser resection mirror structure. The original optical fiber pipe is used to form a water injection channel, and the gap between the inner sheath 1 and the optical fiber pipe 3 is used to form a drainage pipe, so as to construct a stable water inlet and outlet system, so that the caliber of the resection mirror inserted into the urethra can reach Fr18~Fr24, thereby achieving the required small caliber. The laser resection mirror proposed in the present invention can be composed of components that are already available on the market and have sufficient supporting force and strength through the improvement of a completely new structure, rather than reducing the caliber by reducing the thickness and diameter of the components while keeping the existing structure of the laser resection mirror unchanged. As a result, while reducing the caliber of the laser resection mirror, the mirror body still has sufficient supporting force and strength and is not prone to deformation and breakage.

[0036] In another embodiment, a method for using a small-aperture laser resection mirror is also provided, which uses the small-aperture laser resection mirror as described above. The method comprises the following steps:

[0037] The external flushing water enters the human body through the connector 5 and the optical fiber pipe 3. The flushing water in the human body is discharged from the human body through the reflux hole and the inner sheath 1, thereby forming a dynamic circulation of the flushing water.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A small-caliber laser resection mirror, characterized in that: It comprises an inner sheath (1), an endoscope (2), an optical fiber pipeline (3), an operator (4) and a joint (5); the endoscope (2) and the optical fiber pipeline (3) are both inserted into the inner sheath (1); the operator (4) is arranged at one end of the inner sheath (1) and is used to control the expansion and contraction of the optical fiber pipeline (3) inside the inner sheath (1); The end of the inner sheath (1) away from the operator (4) is closed, and a reflux hole is provided on the side wall of the end of the inner sheath (1) away from the operator (4); The optical fiber pipeline (3) is used for passing the optical fiber through, and is also used for injecting water during use; The connector (5) is arranged at one end of the optical fiber pipeline (3) close to the operator (4); the connector (5) comprises two inlets both connected to the optical fiber pipeline (3); one of the inlets is used for inserting an optical fiber into the optical fiber pipeline (3), and the other inlet is used for injecting water into the optical fiber pipeline (3).

2. The small-aperture laser resection mirror according to claim 1, characterized in that: The joint (5) comprises a tee (6), a hose (7) and a locking device; one end of the tee (6) is connected to the optical fiber pipeline (3); the other end of the tee (6) is used to connect to an external water source; the remaining end of the tee (6) is connected to the hose (7); the hose (7) is used to insert an optical fiber into the optical fiber pipeline (3); the locking device is arranged on the tee (6) and is used to apply a force to the hose (7) in the direction of the optical fiber, so that a seal is formed between the hose (7) and the optical fiber.

3. The small-aperture laser resection mirror according to claim 2, characterized in that: The locking device comprises: An insert (8) is sleeved on the hose (7); one end of the insert (8) is provided with a slope; Two threadedly connected ferrules (9); one of the ferrules (9) is fixedly sleeved on the tee (6), and the other ferrule (9) is sleeved on the insert (8), and its inner wall abuts against the inclined surface on the insert (8); when the two ferrules (9) approach or move away from each other, the ferrules (9) squeeze the inclined surface so that the insert (8) deforms in the direction of the hose (7), so that the hose (7) and the optical fiber are sealed.

4. The small-aperture laser resection mirror according to claim 2, characterized in that: The hose (7) and the optical fiber pipe (3) are coaxially arranged.

5. The small-aperture laser resection mirror according to claim 2, characterized in that: The three-way pipe (6) is provided with a valve for controlling the on and off of the external water source.

6. The small-aperture laser resection mirror according to claim 2, characterized in that: The three-way pipe (6) is detachably connected to the optical fiber pipeline (3).

7. The small-aperture laser resection mirror according to claim 1, characterized in that: The joint (5) comprises a three-way pipe (6); one end of the three-way pipe (6) is connected to the optical fiber pipeline (3); the other end of the three-way pipe (6) is used to connect to an external water source; and the remaining end of the three-way pipe (6) is used to insert an optical fiber into the optical fiber pipeline (3).

8. The small-aperture laser resection mirror according to claim 1, characterized in that: A plurality of reflux holes are provided and are evenly distributed in the circumferential direction on the inner sheath (1).

9. The small-aperture laser resection mirror according to claim 1, characterized in that: The water is injected into the optical fiber pipeline (3) by means of pressurized water injection.

10. A method for using a small-caliber laser resection mirror, characterized in that: It uses the small-caliber laser resection mirror as described in any one of claims 1 to 9; the method of use comprises the following steps: External flushing water enters the human body through the joint (5) and the optical fiber pipe (3); the flushing water in the human body is discharged from the human body through the reflux hole and the inner sheath (1), thereby forming a dynamic circulation of flushing water.

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