Urethral sheath device

Abstract

The urethra sheath device comprises an inner core, the inner core comprises an inner core column body, and the front end and the tail end of the inner core column body are communicated; the fixing sheath is arranged on the outer side of the inner core in a sleeving mode, the fixing sheath comprises a fixing sheath column body capable of moving in the axial direction of the inner core column body, the front end of the fixing sheath column body is fixed to the front end of the inner core column body, a distraction part is arranged at the position, close to the front end, of the fixing sheath column body, and the distraction part deforms to be distraction when the fixing sheath column body moves towards the front end; the hole closing device axially penetrates from the rear end of the inner core column body and extends out from the front end, or is positioned in the inner core column body and axially moves and is pulled out towards the rear end of the inner core column body; the pressure controller is installed at the tail of the inner core column body and communicated with the interior of the inner core column body, the pressure controller can detect the pressure in the bladder in real time and control the pressure in the bladder by effectively adjusting the water amount in the bladder, and the obturator can assist the urethral sheath in smoothly entering the bladder to avoid urethral injury when the urethral sheath is indwelled.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a urethral sheath device for the purpose of reducing bladder pressure and avoiding ureteral reflux. Background Art

[0002] Currently, various intracavitary surgeries in urology, especially those requiring continuous irrigation with a urethral sheath, such as those for ureteral and kidney stones, inevitably lead to excessive bladder irrigation fluid, high intravesical pressure, and, in turn, serious problems such as bilateral ureteral reflux, high pressure in the renal pelvis, and subsequent urinary sepsis and renal pelvic mucosal bleeding. Therefore, the surgeon is forced to stop the relevant surgical procedure during the operation and insert a urinary catheter to drain the excess bladder irrigation fluid and reduce the intravesical pressure, which seriously interferes with the operation and increases the risk of intraoperative complications such as urinary sepsis, renal pelvic mucosal bleeding, and even bladder rupture. Therefore, a urethral sheath device that can solve the above problems is needed. Utility Model Content

[0003] The utility model provides a urethral sheath device, which can solve the serious problems of excessive intravesical pressure in conventional urinary tract surgery, which in turn leads to ureteral reflux, high pressure in the renal pelvis, secondary urinary sepsis, renal pelvic mucosal bleeding, etc.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a urethral sheath device, comprising an inner core, wherein the inner core comprises an inner core cylinder, and the front end and the rear end of the inner core cylinder are connected; a fixed sheath, which is sleeved on the outer side of the inner core, and the fixed sheath comprises a fixed sheath cylinder that can move axially along the inner core cylinder, the front end of the fixed sheath cylinder is fixed to the front end of the inner core cylinder, and an expansion part is provided on the fixed sheath cylinder near the front end, and the expansion part is deformed and expanded when the fixed sheath cylinder moves toward the front end; an obturator, It penetrates axially from the rear end of the inner core cylinder and extends out from the front end, or is located inside the inner core cylinder and moved axially toward the rear end of the inner core cylinder and pulled out; a pressure controller is installed at the tail of the inner core cylinder and is connected to the interior of the inner core cylinder. The fixing sheath can fix the urethral sheath after the inner core is inserted into the urethra. The pressure controller can detect the pressure in the bladder in real time and control the pressure in the bladder by effectively regulating the amount of water in the bladder. The obturator can assist the urethral sheath to enter the bladder smoothly, avoid urethral damage when the urethral sheath is left in place, and protect the urethra.

[0005] Preferably, the expansion portion is a plurality of axial through grooves arranged circumferentially around the fixed sheath cylinder. When the fixed sheath cylinder moves axially, the axial through grooves are deformed to form an umbrella-shaped structure, which is fixed to the bladder neck.

[0006] Preferably, the fixing sheath further comprises a knob portion provided at the tail of the fixing sheath cylinder to facilitate control of the movement of the fixing sheath.

[0007] Preferably, the fixed sheath also includes a sliding rod arranged at the tail of the fixed sheath cylinder, and an L-shaped limiting groove is arranged axially on the outer wall of the inner core cylinder. The end of the sliding rod is embedded in the L-shaped limiting groove and moves along the L-shaped limiting groove when the fixed sheath cylinder moves. The sliding rod can limit and guide the movement of the fixed sheath, so that the expansion part remains in the expanded state.

[0008] Preferably, the inner core further comprises a control tube arranged at the tail of the inner core cylinder and extending to one side, and the pressure controller is installed on the control tube, which facilitates the installation of the pressure controller and does not affect the circulation inside the inner core.

[0009] Preferably, the pressure controller includes a pressure relief port arranged on the side wall of the control tube, a valve core installed inside the control tube and axially moving to close or open the pressure relief port, the end of the control tube is provided with a pressure regulating knob whose position can be adjusted axially, and an elastic member is provided between the pressure regulating knob and the valve core. By adjusting the position of the pressure regulating knob, the pressure that pushes the valve core to open the pressure relief port can be adjusted.

[0010] Preferably, the obturator includes an insertion rod, a guide portion provided at the front end of the insertion rod, and an operating portion provided at the rear end of the insertion rod, so as to facilitate the operation of the obturator passing through the inner core.

[0011] Preferably, the guide portion is narrow in front and wide in the back, so as to match the urethra of men and women.

[0012] Preferably, the guide portion is in an arc-shaped or straight shape as a whole. The arc-shaped guide portion matches the physiological curvature of the male urethra, and the straight guide portion matches the characteristics of the female urethra.

[0013] Preferably, the fixing sheath is made of medical silicone or polyurethane material, and the surface is covered with a silver ion antibacterial coating layer. Medical silicone or polyurethane has good biocompatibility and has the characteristics of high softness, good elasticity and durability. The silver ion antibacterial coating layer can reduce the occurrence of urinary tract infection during use.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The structure is simple, consisting of a retaining sheath and an inner core. The obturator helps the urethral sheath enter the bladder smoothly, preventing urethral damage during the indwelling urethral sheath and protecting the urethra. The retaining sheath can be inserted into the urethra along with the inner core to fix the urethral sheath. The pressure controller can detect the intra-bladder pressure in real time and effectively control the intra-bladder pressure by regulating the amount of water in the bladder. The shape and structure of the urethral sheath can comfortably adapt to the shape of the urethra of male and female patients and ensure that the urethral sheath can effectively drain urine from the bladder without causing discomfort or irritation. Medical silicone or polyurethane can be selected as the material. These materials have good biocompatibility and are characterized by high softness, good elasticity, and durability. The surface of the urethral sheath is also coated with silver ion antibacterial coating to reduce the occurrence of urinary tract infections during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural diagram of a structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the first structure of the obturator of the utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the fixed sheath of the present utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the inner core of the utility model;

[0020] Figure 5 This is a schematic diagram of the use process of the retaining sheath of the present invention;

[0021] Figure 6 This is a schematic diagram of the tail structure of the retaining sheath of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the pressure controller of the utility model;

[0023] Figure 8 A three-dimensional structural diagram of another structure of the utility model;

[0024] Figure 9 This is a schematic diagram of the second structure of the obturator of the present invention.

[0025] Reference numerals:

[0026] 1. Inner core, 11. Inner core cylinder, 12. L-shaped limiting slide groove, 13. Control tube, 2. Fixed sheath, 21. Fixed sheath cylinder, 22. Knob part, 23. Slide rod, 24. Axial through groove, 3. Obturator, 31. Guide part, 32. Insert rod, 33. Operating part, 4. Pressure controller, 41. Pressure adjustment knob, 42. Pressure relief port, 43. Valve core. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] The utility model is to solve the serious problems of excessively high bladder pressure during conventional urinary tract surgery, which in turn leads to ureteral reflux, high pressure in the renal pelvis, secondary urinary sepsis, renal pelvic mucosal bleeding, etc. Figure 1-9 As shown, the following technical solution is provided: a urethral sheath device, comprising an inner core 1, wherein the inner core 1 comprises an inner core cylinder 11, and the front end and the rear end of the inner core cylinder 11 are connected; a fixed sheath 2, which is sleeved on the outside of the inner core 1, and the fixed sheath 2 comprises a fixed sheath cylinder 21 which can move axially along the inner core cylinder 11, and the front end of the fixed sheath cylinder 21 is fixed to the front end of the inner core cylinder 11, and an expansion part is provided on the fixed sheath cylinder 21 near the front end, and the expansion part is deformed and expanded when the fixed sheath cylinder 21 moves toward the front end; an obturator 3, which is inserted from the inner The rear end of the core cylinder 11 is axially inserted and extended from the front end, or is located inside the inner core cylinder 11 and axially moved toward the rear end of the inner core cylinder 11 and pulled out; the pressure controller 4 is installed at the tail of the inner core cylinder 11 and is connected to the interior of the inner core cylinder 11. The fixed sheath 2 can fix the urethral sheath after the inner core 1 is inserted into the urethra. The pressure controller 4 can detect the pressure in the bladder in real time and control the pressure in the bladder by effectively adjusting the amount of water in the bladder. The obturator 3 can assist the urethral sheath to enter the bladder smoothly, avoid urethral damage when the urethral sheath is left in place, and protect the urethra.

[0029] Specifically, the inner core 1, the fixed sheath 2 and the obturator 3 are all soft and flexible and have a high degree of biocompatibility. Among them, the lengths of the urethral sheath device for men and the urethral sheath device for women are different, and the structural features of the fixed sheath 2 and the inner core 1 are the same. The overall length of the urethral sheath device for men is 18-20 cm, and the overall length of the urethral sheath device for women is 3-5 cm. The structures of the obturator 3 of the urethral sheath devices for men and women are slightly different. Specifically, the obturator 3 includes an insertion rod 32, a guide portion 31 provided at the front end of the insertion rod 32, and an operating portion 33 provided at the rear end of the insertion rod 32, which facilitates the operation of the obturator 3 passing through the inner core 1. The guide portion 31 is narrow in front and wide in the back, which can match the urethra of men and women. The difference between men and women is that the guide portion 31 is curved or straight as a whole. The curved guide portion 31 matches the physiological curvature of the male urethra (such as Figure 1-2 As shown), the straight guide portion 31 matches the characteristics of the female urethra (as shown Figure 8-9 shown).

[0030] During surgery, the pressure in the bladder is normally between 0-40 cmH2O (centimeter of water column). As urine volume changes, the pressure in the bladder can also increase dramatically. However, if it exceeds 40 cmH2O, it is considered abnormal pressure, which may cause urine in the bladder to enter the ureter and flow back into the kidneys. Therefore, the urethral sheath in this embodiment is connected to the pressure controller 4 via the tail end to monitor the pressure in the bladder in real time. During ureteroscopic lithotripsy, as the operation time increases, the flushing fluid during the operation will flow into the bladder, causing excessive filling of the bladder, leading to urine reflux and an increase in pressure in the renal pelvis, which is not conducive to surgical safety. Once the pressure exceeds the normal range, the operator can promptly adjust the water outlet through the tail end control valve to reduce the pressure in the bladder. Some endoscopic surgeries require bladder filling, such as bladder tumor transurethral resection surgery, bladder stone lithotripsy and other surgeries. For such surgeries, we can adjust the water inlet through the tail end control valve to fill the bladder and ensure the surgical field of view.

[0031] In this embodiment, as a specific implementation of the pressure controller 4, as shown in FIG. Figure 7 As shown, the inner core 1 also includes a control tube 13 extending to one side at the tail of the inner core cylinder 11, and the pressure controller 4 is installed on the control tube 13 to facilitate the installation of the pressure controller 4 without affecting the circulation inside the inner core 1. At the same time, the pressure controller 4 includes a pressure relief port 42 arranged on the side wall of the control tube 13, and a valve core 43 installed inside the control tube 13 for axial movement to close or open the pressure relief port 42. The end of the control tube 13 is provided with a pressure regulating knob 41 whose position can be adjusted axially, and an elastic member is provided between the pressure regulating knob 41 and the valve core 43. By adjusting the position of the pressure regulating knob 41, the pressure for pushing the valve core 43 to open the pressure relief port 42 can be adjusted. The pressure regulating knob 41 and the end of the control tube 13 can be threadedly connected.

[0032] In this embodiment, if Figure 3-5 As shown, the expansion portion is a plurality of axial grooves 24 arranged circumferentially around the fixed sheath cylinder 21. When the fixed sheath cylinder 21 moves axially, the axial grooves 24 will deform to form an umbrella-like structure, which is fixed to the bladder neck. As the umbrella-like structure, the strip-like parts between the axial grooves 24 are mainly deformed, and arch outward from the middle.

[0033] In order to facilitate the operation of the fixing sheath 2 , the fixing sheath 2 further includes a knob portion 22 provided at the tail of the fixing sheath cylinder 21 , so as to facilitate the control of the movement of the fixing sheath 2 .

[0034] like Figure 4-5As shown, the fixed sheath 2 further includes a slide rod 23 disposed at the rear end of the fixed sheath cylinder 21. An L-shaped limiting slot 12 is axially disposed on the outer side wall of the inner core cylinder 11. The end of the slide rod 23 is embedded in the L-shaped limiting slot 12 and moves along the L-shaped limiting slot 12 when the fixed sheath cylinder 21 moves. The slide rod 23 can limit and guide the movement of the fixed sheath 2, so that the expanded portion remains in the expanded state. The slide rod 23 can also be designed to be L-shaped, with its short side facing inward. When in use, the fixed sheath 2 is first pushed axially forward. When one end of the slide rod 23 moves to one end of the long side of the L-shaped limiting slot 12, the fixed sheath 2 is rotated, causing the end of the slide rod 23 to slide into the short side of the L-shaped limiting slot 12. In this way, the fixed sheath 2 cannot move axially on its own, and the expanded portion can remain in the expanded state.

[0035] In this embodiment, the fixed sheath 2 is made of medical silicone or polyurethane material, and the surface is covered with a silver ion antibacterial coating layer. Medical silicone or polyurethane has good biocompatibility and has the characteristics of high softness, good elasticity, and durability. The silver ion antibacterial coating layer can reduce the occurrence of urinary tract infection during use.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] Furthermore, terms such as "primary" and "secondary" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features designated as "primary" or "secondary" may explicitly or implicitly include at least one such feature. Throughout this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0039] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A urethral sheath device, characterized in that: include: An inner core (1), wherein the inner core (1) comprises an inner core column (11), and the front end and the rear end of the inner core column (11) are connected; A fixed sheath (2) is sleeved on the outer side of the inner core (1), the fixed sheath (2) comprising a fixed sheath cylinder (21) movable axially along the inner core cylinder (11), the front end of the fixed sheath cylinder (21) being fixed to the front end of the inner core cylinder (11), and an expansion portion being provided on the fixed sheath cylinder (21) near the front end, the expansion portion being deformed and expanded when the fixed sheath cylinder (21) moves toward the front end; The obturator (3) is inserted axially from the rear end of the inner core cylinder (11) and extends from the front end, or is located inside the inner core cylinder (11) and is axially moved toward the rear end of the inner core cylinder (11) and pulled out; The pressure controller (4) is installed at the tail of the inner core cylinder (11) and is communicated with the interior of the inner core cylinder (11).

2. The urethral sheath device according to claim 1, characterized in that: The expansion portion is a plurality of axial through grooves (24) arranged circumferentially around the fixed sheath cylinder (21).

3. The urethral sheath device according to claim 2, characterized in that: The fixing sheath (2) further comprises a knob portion (22) arranged at the tail of the fixing sheath cylinder (21).

4. The urethral sheath device according to claim 1 or 3, characterized in that: The fixed sheath (2) also includes a sliding rod (23) arranged at the tail of the fixed sheath cylinder (21), and an L-shaped limiting groove (12) is arranged on the outer wall of the inner core cylinder (11) along the axial direction. The end of the sliding rod (23) is embedded in the L-shaped limiting groove (12) and moves along the L-shaped limiting groove (12) when the fixed sheath cylinder (21) moves.

5. The urethral sheath device according to claim 1, characterized in that: The inner core (1) further comprises a control tube (13) arranged at the tail of the inner core cylinder (11) and extending to one side, and the pressure controller (4) is mounted on the control tube (13).

6. The urethral sheath device according to claim 5, characterized in that: The pressure controller (4) comprises a pressure relief port (42) provided on the side wall of the control tube (13), and a valve core (43) installed inside the control tube (13) and axially movable to close or open the pressure relief port (42). The end of the control tube (13) is provided with a pressure regulating knob (41) whose position can be adjusted axially, and an elastic member is provided between the pressure regulating knob (41) and the valve core (43).

7. The urethral sheath device according to claim 1, characterized in that: The obturator (3) comprises an insertion rod (32), a guide portion (31) arranged at the front end of the insertion rod (32), and an operating portion (33) arranged at the rear end of the insertion rod (32).

8. The urethral sheath device according to claim 7, characterized in that: The guide portion (31) is narrow in front and wide in the back.

9. The urethral sheath device according to claim 8, characterized in that: The guide portion (31) is in an arc-shaped or straight shape as a whole.

10. The urethral sheath device according to claim 1, characterized in that: The fixed sheath (2) is made of medical silica gel or polyurethane material, and the surface is covered with a silver ion antibacterial coating layer.

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