Bendable and visible negative pressure suction ureteral access sheath

Abstract

A bendable and visible negative pressure suction ureteral access sheath, comprising a sheath tube base (1). A sheath tube (7) is provided on one side of the sheath tube base (1), a dilator tube (9) is inserted into the sheath tube base (1), and the dilator tube (9) passes through the sheath tube (7) and extends to the outer side of the sheath tube (7); and a deformable tube (8) is provided at the tail end of the sheath tube (7), a bending part (10) is provided at the end of the dilator tube (9) extending to the outer side of the sheath tube (7), and a dilator tube base (11) is provided at the end of the dilator tube (9) passing through the sheath tube base (1).

Description

Flexible, visual, and negative pressure suction ureteral sheath Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a flexible, visual, and negative pressure suction ureteral sheath. Background Art

[0002] Currently, ureteroscopy has become one of the important means of treating upper urinary tract stones. During transurethral ureteroscopy, a ureteral channel sheath is generally required to be placed, such as the Chinese patent: CN208927370U, a flexible, visual, and negative pressure suction ureteral sheath. The flexible, visual, and negative pressure suction ureteral sheath includes an outer sheath and an inner core inserted into the outer sheath. The inner core is provided with a central channel for placing a ureteroscope. The inner core has a transparent head that facilitates the ureteroscope to collect images. This application directly sets a central channel in the inner core, directly uses the ureteroscope in the inner core, and at the same time, in order to facilitate the ureteroscope to collect images;

[0003] CN215688239U disposable dual-channel variable diameter ureteroscope guide sheath belongs to the field of medical catheter technology, including a ureteral guide sheath, which gradually changes in diameter from the renal pelvis end to the outside of the urethral opening. The ureteral guide sheath is axially provided with independent large cavity channel and small cavity channel inside. The external part of the ureteral guide sheath is also provided with a negative pressure suction tube connected to the large cavity channel, and the external part of the small cavity channel is connected to a transparent pressure measuring tube with a scale and a pressure relief port.

[0004] The main purpose of the above patent is to facilitate the placement of the channel sheath in the optimal position and use negative pressure to clear the water and stones in the renal pelvis. However, when the above structure needs to pass through the tortuous parts of the urethra and ureter, it has poor passability because it does not have a certain degree of flexibility as a whole. For this reason, we have proposed a flexible, visible, and negative pressure-suctionable ureteral sheath. Utility Model Content (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a flexible, visual, and negative pressure-suctionable ureteral sheath. By utilizing the active bending performance of the ureteroscope, the operator can operate the handle of the ureteroscope to bend the ureteroscope and ureteral sheath combination, and the ureteroscope and dilation tube combination as a whole, which is conducive to passing through the tortuous parts of the urethra and ureter, and retaining the ureteral sheath under visual conditions.

[0006] Before placing the ureteral sheath, there is no need to place a guidewire through the ureteroscope, which reduces the operation time and the patient's medical expenses. (2) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flexible, visible, and negative pressure-suctionable ureteral sheath, comprising a sheath seat, a sheath is provided on one side of the sheath seat, an expansion tube is inserted into the interior of the sheath seat, and the expansion tube passes through the sheath and extends to the outside of the sheath, a deformation tube is provided at the end of the sheath, a bending portion is provided at one end of the expansion tube extending to the outside of the sheath, and an expansion tube seat is provided at one end of the expansion tube passing through the sheath seat.

[0008] Preferably, the end of the dilation tube is conical and made of transparent material. The ureteroscope can see the front image through the transparent tip. The ureteroscope and dilation tube combination can be pushed forward before the outer sheath to expand the cavity.

[0009] Preferably, the curved portion of the expansion tube is a mesh-shaped, hollow, or hole-shaped tube, and the curved portion is made of deformable rubber or nylon, and the rubber is medical-grade rubber or nylon.

[0010] Preferably, the deformable tube of the sheath is a deformable rubber tube, and the rubber is medical grade rubber.

[0011] Preferably, the sheath tube seat includes an oblique tube 1, a sheath tube seat connecting tube, an oblique tube 2 and a handle. The oblique tube 1 and the oblique tube 2 are fixedly installed on both sides of the sheath tube seat connecting tube. The sheath tube seat connecting tube is connected to the sheath tube, and the handles are fixedly installed on both sides of the sheath tube seat connecting tube.

[0012] Preferably, the end of the sheath-tube seat connecting tube is integrally formed with two end protrusions, and a movable handle is provided on the expansion tube seat.

[0013] Preferably, a detachable sealing cap with a hole is installed at the end of the sheath-tube-base connecting tube.

[0014] Preferably, the sheath tube consists of an outer tube and an inner tube, and the outer tube is located outside the inner tube. The interior of the outer tube is filled with multiple groups of metal wires, and the outer tube is coated with a hydrophilic coating. (3) Beneficial effects

[0015] Compared with the existing technology, the present invention provides a flexible, visual, and negative pressure suction ureteral sheath, which has the following beneficial effects:

[0016] This flexible, visual, and negative-pressure-suctionable ureteral sheath utilizes the active bending performance of the ureteroscope. The operator can operate the handle of the ureteroscope to bend the ureteroscope and ureteral sheath combination, and the ureteroscope and dilation tube combination as a whole, which is beneficial for passing through the tortuous parts of the urethra and ureter, and for retaining the ureteral sheath under visual conditions.

[0017] The flexible, visual, and negative-pressure-suctionable ureteral sheath can be directly placed under visual conditions without the need to place a guide wire with a ureteroscope in advance. This saves time for operating the ureteroscope and the cost of guide wire consumables, increases the success rate of ureteral sheath placement, and improves the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view schematic diagram of the utility model;

[0019] Figure 2 is a schematic cross-sectional view of the sheath;

[0020] Figure 3 is a schematic diagram of the sheath tube seat connecting tube;

[0021] FIG4 is a schematic diagram of an expansion tube seat.

[0022] In the figure: 1. Sheath seat; 2. Oblique tube 1; 3. Sheath seat connecting tube; 4. End protrusion; 5. Oblique tube 2; 6. Handle; 7. Sheath; 8. Deformation tube; 9. Expansion tube; 10. Bending part; 11. Expansion tube seat; 12. Outer tube; 13. Metal wire; 14. Inner tube. DETAILED DESCRIPTION

[0023] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] Please refer to Figures 1-4. The flexible, visible, and negative pressure-suction ureteral sheath includes a sheath seat 1. A sheath 7 is provided on one side of the sheath seat 1. An expansion tube 9 is inserted into the interior of the sheath seat 1, and the expansion tube 9 passes through the sheath 7 and extends to the outside of the sheath 7. A deformation tube 8 is provided at the end of the sheath 7. A bending portion 10 is provided at one end of the expansion tube 9 extending to the outside of the sheath 7, and an expansion tube seat 11 is provided at one end of the expansion tube 9 passing through the sheath seat 1.

[0025] Furthermore, the end of the expansion tube 9 is tapered and made of a transparent material, so that the ureteroscope can see the front image through the transparent tip.

[0026] Furthermore, the bending portion 10 is a mesh or hollow tube, and the bending portion 10 is made of deformable rubber or nylon, and the rubber is medical-grade rubber or the nylon bending portion 10 is bendable.

[0027] Furthermore, the deformable tube 8 is a deformable rubber tube, the rubber is medical grade rubber, the deformable tube 8 is bendable, the deformable tube 8 and the bending portion 10 are bendable, and the active bending performance of the ureteroscope can be utilized to perform overall bending.

[0028] Furthermore, the sheath tube seat 1 includes an oblique tube 2, a sheath tube seat connecting tube 3, an oblique tube 2 5 and a handle 6. The oblique tube 1 and the oblique tube 2 5 are fixedly installed on both sides of the sheath tube seat connecting tube 3. The sheath tube seat connecting tube 3 is connected to the sheath tube 7, and the handles 6 are fixedly installed on both sides of the sheath tube seat connecting tube 3.

[0029] Furthermore, two end protrusions 4 are integrally formed at the end of the sheath tube seat connecting tube 3 , and a movable handle is provided on the expansion tube seat 11 .

[0030] Furthermore, the sheath tube 7 is composed of an outer tube 12 and an inner tube 14 , and the outer tube 12 is located outside the inner tube 14 . The interior of the outer tube 12 is filled with multiple groups of metal wires 13 , and the outer tube 12 is coated with a hydrophilic coating.

[0031] Furthermore, the end of the sheath tube seat connecting tube 3 is equipped with a detachable perforated sealing cap, which is used to reduce the gap between the ureteral sheath and the ureteroscope during negative pressure suction, thereby increasing the pressure of negative pressure suction. The expansion tube seat 11 is provided with a movable handle, which can be manipulated to push and pull the expansion tube and ureteroscope combination forward and backward, adjust the length of the expansion tube in the human body, and increase the bending range of the ureteroscope and expansion tube combination, which is conducive to dilating the urinary tract.

[0032] The method for inserting a flexible, visual, and negative pressure-suctionable ureteral sheath comprises the following steps:

[0033] Insert the dilator tube 9 into the sheath seat 1 and through the sheath tube 7 to form a complete ureteral sheath. Then insert the ureteroscope into the dilator tube 9 to form a ureteroscope and ureteral sheath combination, and a ureteroscope and dilator tube combination.

[0034] Using the camera system of the ureteroscope, the combination is inserted into the human body under direct vision, enters the bladder through the urethra, finds the ureteral opening, and continues to insert the ureter until the combination reaches the renal pelvis;

[0035] After reaching the renal pelvis, the sheath 7 is left in the body, the dilator tube 9 and the ureteroscope are taken out, and the dilator tube 9 and the ureteroscope are separated outside the human body;

[0036] Then insert the ureteroscope into the sheath 7, and after reaching the kidney, proceed to the next step.

[0037] If negative pressure suction is required during the operation, the oblique tube 1 2 and the oblique tube 2 5 on the sheath seat 1 can be used to connect the negative pressure suction device, and then negative pressure adsorption can be performed to suck out the accumulated water and gravel.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible, visual, negative pressure suction ureteral sheath, comprising a sheath seat (1), characterized in that: A sheath tube (7) is provided on one side of the sheath tube seat (1); an expansion tube (9) is inserted into the interior of the sheath tube seat (1), and the expansion tube (9) passes through the sheath tube (7) and extends to the outside of the sheath tube (7); a deformation tube (8) is provided at the end of the sheath tube (7); a bending portion (10) is provided at one end of the expansion tube (9) extending to the outside of the sheath tube (7); and an expansion tube seat (11) is provided at one end of the expansion tube (9) passing through the sheath tube seat (1).

2. The flexible, visual, negative pressure-attractive ureteral sheath according to claim 1, characterized in that: The end of the expansion tube (9) is conical, the end of the expansion tube (9) is made of a transparent material, and the surface of the expansion tube (9) is coated with a hydrophilic coating.

3. The bendable, visual, and negative pressure-attractive ureteral sheath according to claim 1, characterized in that: The curved portion (10) is in the form of a mesh or a perforated hollow tube.

4. The bendable, visual, and negative pressure-attractive ureteral sheath according to claim 1, characterized in that: The deformable tube (8) is a deformable rubber tube, and the surface of the deformable tube (8) is coated with a hydrophilic coating.

5. The bendable, visual, and negative pressure-attractive ureteral sheath according to claim 1, characterized in that: The sheath tube seat (1) comprises an inclined tube 1 (2), a sheath tube seat connecting tube (3), an inclined tube 2 (5) and a handle (6); the inclined tube 1 (2) and the inclined tube 2 (5) are respectively fixedly mounted on both sides of the sheath tube seat connecting tube (3); the sheath tube seat connecting tube (3) is connected to the sheath tube (7); and the handles (6) are fixedly mounted on both sides of the sheath tube seat connecting tube (3).

6. The bendable, visual, and negative pressure-attractive ureteral sheath according to claim 5, characterized in that: The end of the sheath tube seat connecting tube (3) is integrally formed with two end protrusions (4), and a movable handle is provided on the expansion tube seat (11).

7. The flexible, visible, negative pressure-attractive ureteral sheath according to claim 5, characterized in that: The end of the sheath-tube seat connecting tube (3) is provided with a detachable sealing cap with holes.

8. The flexible, visual, and negative pressure-attractive ureteral sheath according to claim 1, characterized in that: The sheath tube (7) is composed of an outer tube (12) and an inner tube (14), wherein the outer tube (12) is located outside the inner tube (14), the interior of the outer tube (12) is filled with a plurality of groups of metal wires (13), and the outer tube (12) is coated with a hydrophilic coating.

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