Universal introducer for adapting to narrow urethra

Abstract

The utility model provides a universal introducer for adapting to a narrow urethra, which is used for solving the problems that an inner sheath and an outer sheath of an existing introducer for adapting to the narrow urethra cannot freely rotate, so that the outer sheath must be synchronously rotated when the inner sheath is rotated, relative friction is generated between the special-shaped outer sheath and the urethra, and the urethra is damaged. The urethra injury risk is increased. According to the universal guide device for adapting to the narrow urethra, the inner guide tube of the inner sheath is designed to be a special-shaped tube of a gourd-shaped structure, it is guaranteed that enough passing space is provided for a standard endoscope, an optical fiber, inlet water and outlet water, meanwhile, the tube perimeter of the outer guide tube of the outer sheath is effectively reduced, and the utilization rate of the standard endoscope, the optical fiber, the inlet water and the outlet water is increased. The device can be completely suitable for patients with urethrostenosis; meanwhile, the outer guide tube is designed to be a cylindrical tube, so that the inner guide tube can freely rotate in the outer guide tube, rotation of the outer guide tube caused by rotation of the inner guide tube is effectively avoided, and the risk of urethral injury is reduced.

Description

Technical Field

[0001] The utility model relates to an introducer, in particular to a universal introducer for adapting to a narrow urethra. Background Art

[0002] During urology surgeries, an introducer and an endoscope are used to assist. However, due to individual differences among patients, the conventional FR26 introducer cannot be used for patients with urethral stenosis. Therefore, a thinner introducer needs to be designed to accommodate patients with urethral stenosis. At present, although there are introducers that can adapt to narrow urethra abroad, the outer sheath of this introducer is a special-shaped structure, so that the inner and outer sheaths cannot rotate freely. During the operation, the outer sheath must be rotated synchronously when the inner sheath is rotated, which will cause relative friction between the special-shaped outer sheath and the urethra, increasing the risk of urethral injury. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problem that the inner sheath and the outer sheath of the existing introducer adapting to the narrow urethra cannot form free rotation, resulting in the outer sheath having to be rotated synchronously when the inner sheath is rotated, causing relative friction between the irregular outer sheath and the urethra, thereby increasing the risk of urethral injury, and to provide a universal introducer for adapting to the narrow urethra.

[0004] In order to achieve the above purpose, the technical solutions provided by the utility model are as follows:

[0005] A universal introducer for adapting to a narrow urethra, comprising an outer sheath and an inner sheath, wherein the outer sheath comprises an outer guide tube and a first connecting portion;

[0006] The outer guide tube is a hollow cylindrical structure, and one end of the outer guide tube is circumferentially provided with a plurality of through holes;

[0007] The first connecting portion is a hollow structure, which is connected to an end of the outer guide tube away from the through hole; the diameter of the first connecting portion is larger than the diameter of the outer guide tube, and the two are coaxially connected via a baffle;

[0008] The inner sheath comprises an inner guide tube and a second connecting portion;

[0009] The inner guide tube is composed of two parallel-arranged conduits, the internal channels of the two conduits being connected to each other in the radial direction;

[0010] The second connecting portion is a hollow structure and is connected to one end of the inner guide tube; the channel formed by the second connecting portion and the inner guide tube is used to allow the endoscope, the optical fiber and the water to pass through;

[0011] The second connection part is used for detachably sealingly connecting with the first connection part, and the inner guide pipe is used for being sleeved in the outer guide pipe, so that a channel for returning water is formed between the outer side wall of the inner guide pipe and the inner side wall of the outer guide pipe.

[0012] Furthermore, a handle is installed on the second connecting portion to facilitate the rotation of the inner sheath.

[0013] Furthermore, the handle is detachably connected to the second connecting portion.

[0014] Furthermore, an obturator is included to avoid damage to human tissue;

[0015] The obturator is used to be coaxially arranged inside the outer guide tube, and the tail end is detachably connected to the first connecting part, and the obturator end extends out of an end of the outer guide tube close to the through hole.

[0016] Furthermore, the baffle, the inner side wall of the first connecting part close to the baffle, the outer side wall at the corresponding position of the second connecting part, and the sealed connection between the second connecting part and the first connecting part form an annular area;

[0017] The annular region is divided into a first annular region and a second annular region along the axial direction by an annular partition, and the first annular region is arranged close to one side of the baffle;

[0018] A water outlet pipe is provided on the side wall of the first connecting portion at a position corresponding to the first annular area, and a water inlet pipe is provided at a position corresponding to the second annular area;

[0019] At least one water inlet hole connected to the interior of the second connecting portion is provided at a position corresponding to the second annular region on the side wall of the second connecting portion;

[0020] The water inlet pipe, the second annular area, the water inlet hole and the internal channels of the two conduits form an inlet channel for water inlet; the through hole, the channel for return water between the outer wall of the inner guide pipe and the inner wall of the outer guide pipe, the first annular area and the water outlet pipe form an outlet channel for water outlet.

[0021] Furthermore, the second connection portion includes a connection port connected to the inner guide tube, and a first pipe and a second pipe connected to the connection port respectively.

[0022] The two conduits are defined as a first conduit and a second conduit, wherein a radial cross-sectional area of ​​the first conduit is greater than a radial cross-sectional area of ​​the second conduit;

[0023] The first pipe, the connecting port and the first conduit form a first passage for passing an endoscope;

[0024] The second pipe, the connecting port and the second conduit form a second passage for the optical fiber to pass through.

[0025] Further, the first pipeline and the first conduit are linearly connected via a connecting port;

[0026] The second pipeline is connected to the second conduit through a connecting port.

[0027] Furthermore, the connection port and the inner guide tube are connected by a snap-fitting manner.

[0028] Furthermore, the handle is installed on the first pipe through a marble buckle.

[0029] Furthermore, the circumference of the outer guide tube is 22.5 mm.

[0030] Compared with the prior art, the utility model has the following beneficial effects:

[0031] 1. The utility model provides a universal introducer for adapting to a narrow urethra. The inner guide tube of the inner sheath is designed as a special-shaped tube with a gourd-shaped structure. While ensuring that a standard endoscope, an optical fiber, and water inlet and outlet have sufficient space to pass through, the circumference of the outer guide tube of the outer sheath is effectively reduced, so that it can be fully suitable for patients with urethral stenosis; at the same time, since the outer guide tube is a cylindrical tube, the inner guide tube can rotate freely in the outer guide tube, effectively avoiding the rotation of the outer guide tube caused by the rotation of the inner guide tube, reducing the risk of urethral injury, and even if the outer guide tube rotates, due to its cylindrical tube design, the friction on the urethra will be greatly reduced.

[0032] 2. The utility model provides a universal introducer for adapting to a narrow urethra, and a handle is installed on the second connecting portion of the inner sheath to facilitate the rotation of the inner sheath, so that it can flexibly cope with different surgical techniques and intraoperative scenes in actual applications.

[0033] 3. The utility model provides a universal introducer for adapting to a narrow urethra. The inner guide tube of the inner sheath is designed as a special-shaped tube with a gourd-shaped structure, and the outer guide tube of the outer sheath is designed as a columnar structure, so that the circumference of the outer guide tube can reach 22.5 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of an outer sheath in an embodiment of a universal introducer for adapting to a narrow urethra according to the utility model;

[0035] Figure 2 This is a schematic diagram of the structure of the inner sheath in the embodiment of the utility model;

[0036] Figure 3 for Figure 2 Left view of

[0037] Figure 4 This is a schematic diagram of the structure in which the inner sheath and the outer sheath are assembled in an embodiment of the utility model;

[0038] Figure 5 It is a schematic diagram of the structure of the obturator in the embodiment of the utility model.

[0039] The specific reference numerals are as follows:

[0040] 1-outer sheath, 11-outer guide tube, 111-through hole, 12-first connecting portion, 121-baffle, 122-water inlet pipe, 123-water outlet pipe;

[0041] 2-inner sheath, 21-inner guide tube, 22-second connecting portion, 221-connecting port, 222-first pipeline, 223-second pipeline;

[0042] 3- obturator; 4- handle. DETAILED DESCRIPTION

[0043] In order to make the advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] A universal introducer for adapting to a narrow urethra comprises an outer sheath 1, an inner sheath 2 and an obturator 3.

[0045] like Figure 1 As shown, the outer sheath 1 includes an outer guide tube 11 and a first connecting portion 12; the outer guide tube 11 is a hollow cylindrical structure, and a plurality of through holes 111 are circumferentially opened at one end thereof; the first connecting portion 12 is a hollow structure, and is connected to an end of the outer guide tube 11 away from the through holes 111; the diameter of the first connecting portion 12 is larger than the diameter of the outer guide tube 11, and the two are coaxially connected via a baffle 121.

[0046] like Figure 2 , Figure 3 As shown, the inner sheath 2 includes an inner guide tube 21 and a second connecting portion 22; the inner guide tube 21 is composed of two parallel catheters, the internal channels of the two catheters are interconnected in the radial direction, and in this embodiment, the radial cross-section of the two catheters after being connected is a gourd-shaped structure; the second connecting portion 22 is a hollow structure, and is connected to one end of the inner guide tube 21.

[0047] The second connection part 22 includes a connection port 221 connected to the inner guide tube 21, a first pipe 222 and a second pipe 223 connected to the connection port 221. The two pipes are defined as a first pipe and a second pipe, respectively. The radial cross-sectional area of ​​the first pipe is larger than the radial cross-sectional area of ​​the second pipe. The first pipe 222, the connection port 221 and the first pipe form a first passage for the endoscope to pass through, and the second pipe 223, the connection port 221 and the second pipe form a second passage for the optical fiber to pass through. Preferably, considering the bending properties of the endoscope and the optical fiber, the first pipe 222 is connected to the first pipe in a straight line through the connection port 221, and the second pipe 223 is connected to the second pipe in a folded manner through the connection port 221, so as to facilitate the smooth passage of the endoscope and the optical fiber.

[0048] like Figure 4 As shown, the second connection part 22 is used for detachably sealingly connecting with the first connection part 12, and the inner guide tube 21 is used for being sleeved in the outer guide tube 11, so that a channel for returning water is formed between the outer wall of the inner guide tube 21 and the inner wall of the outer guide tube 11. In this embodiment, the connection port 221 of the second connection part 22 is connected to the inner guide tube 21 of the first connection part 12 by means of a snap connection, and in other embodiments of the utility model, the connection between the second connection part 22 and the first connection part 12 can also be achieved by other means such as threaded connection.

[0049] At the same time, the baffle 121, the inner side wall of the first connection part 12 close to the baffle 121, the outer side wall of the second connection part 22 at the corresponding position, and the sealed connection between the second connection part 22 and the first connection part 12 form an annular area. The annular area is further divided into a first annular area and a second annular area by an annular partition along the axial direction, wherein the first annular area is close to the side of the baffle 121, and the second annular area is close to the side of the sealed connection between the second connection part 22 and the first connection part 12. A water outlet pipe 123 is provided on the side wall of the first connection part 12 at a position corresponding to the first annular area, and a water inlet pipe 122 is provided on the side wall of the second connection part 22 at a position corresponding to the second annular area. At least one water inlet hole connected to the interior of the second connection part 22 is provided on the side wall of the second connection part 22 at a position corresponding to the second annular area.

[0050] The water inlet pipe 122, the second annular area, the water inlet hole and the internal channels of the two catheters form a water inlet channel for water inlet. External water flows into the second annular area through the water inlet pipe 122 in turn, then flows into the internal channels of the two catheters through the water inlet hole via the second connecting portion 22, and flows to the surgical site through the gap between the endoscope and the optical fiber. The through hole 111, the channel for water return between the outer side wall of the inner guide tube 21 and the inner side wall of the outer guide tube 11, the first annular area and the water outlet pipe 123 form a water outlet channel for water discharge. Used water enters the water return channel between the inner guide tube 21 and the outer guide tube 11 through the multiple through holes 111 on the side wall of the outer guide tube 11, then flows to the first annular area, and then is discharged through the water outlet pipe 123.

[0051] Since the inner guide tube 21 of the inner sheath 2 in the utility model is a special-shaped tube with a gourd-shaped structure, it not only ensures that the standard φ4mm endoscope, optical fiber, water inlet and outlet have sufficient passage space, but also effectively reduces the tube circumference of the outer guide tube 11 of the outer sheath 1, so that it can be fully applicable to patients with urethral stenosis. The tube circumference of the outer guide tube 11 in the utility model can reach 22.5mm. In addition, although the inner guide tube 21 in the utility model is a special-shaped tube, since the outer guide tube 11 is a cylindrical tube, the inner guide tube 21 can rotate freely in the outer guide tube 11, effectively avoiding the rotation of the outer guide tube 11 caused by the rotation of the inner guide tube 21, reducing the risk of urethral injury, and even if the outer guide tube 11 rotates, due to its cylindrical tube design, the friction on the urethra will be greatly reduced.

[0052] Since the end area of ​​the outer sheath 1 is relatively large, direct insertion into the surgical site through the outer sheath 1 may cause tissue damage at the surgical site, such as Figure 5 As shown, an obturator 3 is usually provided separately. Before the outer sheath 1 and the inner sheath 2 are matched, the obturator 3 is first coaxially provided in the outer guide tube 11, and the tail end of the obturator 3 is detachably connected to the first connecting portion 12, and the obturator end of the obturator 3 extends out of the front end of the outer guide tube 11 (the end close to the through hole 111). When the outer sheath 1 is inserted into the surgical site, the front end of the outer sheath 1 is closed by the closed end of the obturator 3 to avoid damaging human tissue.

[0053] In addition, in order to facilitate the rotation of the inner sheath 2 and flexibly cope with different surgical habits and intraoperative scenes in practical applications, the utility model is provided with a handle 4 on the first pipe 222 of the second connecting portion 22. Preferably, in this embodiment, the handle 4 is detachably mounted on the first pipe 222 by a marble buckle, and in other embodiments of the utility model, the handle 4 can also be mounted by a fixed connection or other detachable connection.

[0054] The above description is only used to illustrate the technical solution of the utility model, rather than to limit it. For ordinary professional and technical personnel in the field, the specific technical solution recorded in the above embodiment can be modified, or some of the technical features therein can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution protected by the utility model.

Claims

1. A universal introducer for adapting to a narrow urethra, comprising an outer sheath (1) and an inner sheath (2), characterized in that: The outer sheath (1) comprises an outer guide tube (11) and a first connecting portion (12); The outer guide tube (11) is a hollow cylindrical structure, and one end of the outer guide tube is circumferentially provided with a plurality of through holes (111); The first connecting portion (12) is a hollow structure, and is connected to an end of the outer guide tube (11) away from the through hole (111); the diameter of the first connecting portion (12) is greater than the diameter of the outer guide tube (11), and the two are coaxially connected via a baffle (121); The inner sheath (2) comprises an inner guide tube (21) and a second connecting portion (22); The inner guide tube (21) is composed of two parallel-arranged conduits, the internal channels of the two conduits being connected to each other in the radial direction; The second connecting portion (22) is a hollow structure and is connected to one end of the inner guide tube (21); the channel formed by the second connecting portion (22) and the inner guide tube (21) is used to allow the endoscope, the optical fiber and the water to pass through; The second connecting portion (22) is used for being detachably sealedly connected to the first connecting portion (12), and the inner guide tube (21) is used for being sleeved inside the outer guide tube (11), so that a channel for returning water is formed between the outer side wall of the inner guide tube (21) and the inner side wall of the outer guide tube (11).

2. A universal introducer for adapting to a narrow urethra according to claim 1, characterized in that: A handle (4) is mounted on the second connecting portion (22).

3. A universal introducer for adapting to a narrow urethra according to claim 2, characterized in that: The handle (4) is detachably connected to the second connecting portion (22).

4. A universal introducer for adapting to a narrow urethra according to claim 1, characterized in that: Also included is an obturator (3); The obturator (3) is used to be coaxially arranged inside the outer guide tube (11), and the tail end is detachably connected to the first connecting portion (12), and the obturator end extends out of one end of the outer guide tube (11) close to the through hole (111).

5. A universal introducer for adapting to a narrow urethra according to claim 1, characterized in that: The baffle (121), the inner side wall of the first connecting portion (12) close to the baffle (121), the outer side wall at the corresponding position of the second connecting portion (22), and the sealed connection between the second connecting portion (22) and the first connecting portion (12) form an annular area; The annular region is divided into a first annular region and a second annular region along the axial direction by an annular partition, and the first annular region is arranged close to one side of the baffle (121); A water outlet pipe (123) is provided at a position corresponding to the first annular area on the side wall of the first connecting portion (12), and a water inlet pipe (122) is provided at a position corresponding to the second annular area; At least one water inlet hole communicating with the interior of the second connecting portion (22) is provided at a position corresponding to the second annular region on the side wall of the second connecting portion (22); The water inlet pipe (122), the second annular area, the water inlet hole and the internal channels of the two conduits form a water inlet channel for water inlet; the through hole (111), the channel for water return between the outer side wall of the inner guide pipe (21) and the inner side wall of the outer guide pipe (11), the first annular area and the water outlet pipe (123) form a water outlet channel for water outlet.

6. A universal introducer for adapting to a narrow urethra according to any one of claims 1 to 5, characterized in that: The second connection portion (22) comprises a connection port (221) connected to the inner guide tube (21), and a first pipe (222) and a second pipe (223) respectively connected to the connection port (221); The two conduits are defined as a first conduit and a second conduit, wherein a radial cross-sectional area of ​​the first conduit is greater than a radial cross-sectional area of ​​the second conduit; The first pipe (222), the connecting port (221) and the first conduit form a first passage for passing an endoscope; The second pipe (223), the connecting port (221) and the second conduit form a second passage for the optical fiber to pass through.

7. A universal introducer for adapting to a narrow urethra according to claim 6, characterized in that: The first pipeline (222) is linearly connected to the first conduit via a connecting port (221); The second pipeline (223) is connected to the second conduit via a connecting port (221).

8. A universal introducer for adapting to a narrow urethra according to claim 7, characterized in that: The connection port (221) and the inner guide tube (21) are connected by means of a snap connection.

9. A universal introducer for adapting to a narrow urethra according to claim 2 or 3, characterized in that: The handle (4) is mounted on the first pipe (222) via a marble buckle.

10. A universal introducer for adapting to a narrow urethra according to any one of claims 1 to 5, characterized in that: The outer guide tube (11) has a circumference of 22.5 mm.

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