Negative-pressure stone-removing ureter guiding sheath

Abstract

The utility model discloses a negative pressure calculus removing ureter guiding sheath, which belongs to the technical field of ureter guiding sheaths and comprises a ureter guiding sheath, an inner tube is arranged inside the ureter guiding sheath, a discharge groove is formed between the inner tube and the guiding sheath, one end of the inner tube is fixedly connected with a sealing end, the diameter of the sealing end is the same as the inner diameter of the inner tube, and the diameter of the inner tube is the same as the inner diameter of the inner tube. One end of the sealing end is connected with a bearing end, one end of the sealing end is located outside the ureter guiding sheath, the bearing end is in a circular truncated cone shape, the large-diameter end face of the bearing end is fixedly connected with the sealing end, the other end of the bearing end is provided with a guiding end, and the diameter of the guiding end is the same as that of the small-diameter end face of the bearing end. Through grooves are formed in the inner tube, the sealing end, the bearing end and the guiding end, an expansion base is arranged at the end, away from the guiding end, of the ureter guiding sheath, the side face of the ureter guiding sheath is connected with a guiding sheath base, an inner cavity of the guiding sheath base is communicated with a discharging groove, smashed calculi can be directly discharged, secondary operation is not needed, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of ureteral guiding sheath technology, and more specifically, to a negative pressure lithotripsy ureteral guiding sheath. Background Technology

[0002] The ureteral guiding sheath is a core instrument used in endoscopic urological surgery. It can dilate the ureter and maintain the ureteral passage for the injection and aspiration of fluids, as well as the insertion and removal of endoscopic and other related instruments.

[0003] The existing ureteral guiding sheath uses a dilator to flush and break up stones, and then drains the fluid through the gap between the dilator and the guiding sheath. However, this technique cannot effectively remove the stones in practice, requiring secondary stone removal, which is quite cumbersome. To address these issues, a solution is proposed below. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a negative pressure ureteral guiding sheath for stone removal, which can directly expel the crushed stones without secondary operation and is convenient to use.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A negative pressure lithotripsy ureteral guiding sheath includes a ureteral guiding sheath with an inner tube inside. A discharge groove is formed between the inner tube and the guiding sheath. A sealing end is fixedly connected to one end of the inner tube, and the diameter of the sealing end is the same as the inner diameter of the inner tube. A receiving end is connected to one end of the sealing end, and one end of the sealing end is located outside the ureteral guiding sheath. The receiving end is frustoconical, and the large-diameter end face of the receiving end is fixedly connected to the sealing end. A guiding end is provided at the other end of the receiving end, and the diameter of the guiding end is the same as the diameter of the small-diameter end face of the receiving end. Through grooves are formed inside the inner tube, sealing end, receiving end, and guiding end. An expansion base for moving the inner tube is provided at the end of the ureteral guiding sheath away from the guiding end. A guiding sheath seat is connected to the side of the ureteral guiding sheath. The guiding sheath seat is tubular, and the inner cavity of the guiding sheath seat communicates with the discharge groove.

[0007] Preferably, the expansion base includes an end seat and a connecting tube. The end seat is rotatably arranged at one end of the ureteral guiding sheath, the connecting tube passes through the end seat, and the connecting tube and the end seat are threadedly engaged. One end of the connecting tube is fixedly connected to one end of the inner tube.

[0008] Preferably, the inner tube has a circular cross-section, and the diameter of the inner tube is smaller than the inner diameter of the ureteral guiding sheath.

[0009] Preferably, the inner tube has a circular cross-section, and the diameter of the inner tube is the same as the inner diameter of the ureteral guide sheath. The outer surface of the inner tube is uniformly provided with a plurality of guide grooves.

[0010] Preferably, the inner tube has a circular cross-section, and the diameter of the inner tube is the same as the inner diameter of the ureteral guiding sheath, and a spiral groove is formed on the outer surface of the inner tube.

[0011] Preferably, the end of the sealing end near the inner tube is chamfered.

[0012] Preferably, the inner tube, sealing end, receiving end, and guiding end are concentric and integrally formed.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] 1. This solution facilitates the insertion of the ureteral guide sheath into the upper part of the ureter via the guide end and receiving end. The inner tube is moved by the expansion base, which pushes the sealing end, receiving end, and guide end until the sealing end is removed from the ureteral guide sheath, exposing the discharge groove. Water is then injected through the expansion base and the passage groove. A negative pressure device is connected to one end of the guide sheath, which draws negative pressure into the discharge groove. Water and broken stones inside the passage groove are then discharged from the body through the discharge groove, avoiding the trouble of secondary cleaning and improving efficiency. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of the present utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is an enlarged structural schematic diagram of A in this utility model;

[0018] Figure 4 This is an enlarged structural schematic diagram of B of this utility model;

[0019] Figure 5 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0020] Figure 6 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0021] Explanation of the labels in the diagram:

[0022] 1. Ureteral guiding sheath; 2. Inner tube; 3. Discharge groove; 4. Sealing end; 5. Receiving end; 6. Guiding end; 7. Through groove; 8. Expansion base; 9. Guiding sheath seat; 10. End seat; 11. Connecting tube; 12. Guide groove; 13. Spiral groove; 14. Chamfer; 15. Base; 16. Top seat; 17. Threaded connection part. Detailed Implementation

[0023] Example 1:

[0024] Please see Figure 1-4 A negative pressure lithotripsy ureteral guide sheath 1 includes a ureteral guide sheath 1 with an inner tube 2 inside. The inner tube 2 has a circular cross-section, and its diameter is smaller than the inner diameter of the ureteral guide sheath 1. The inner tube 2 and the ureteral guide sheath 1 are slidably fitted together, and a discharge groove 3 is formed between the inner tube 2 and the guide sheath. One end of the ureteral guide sheath 1 is provided with an expansion base 8 for moving the inner tube 2. The expansion base 8 includes an end seat 10 and a connecting tube 11. The end seat 10 is rotatably arranged on the ureteral guide sheath. At one end of 1, the end seat 10 includes a base 15 and a top seat 16. The base 15 is connected to one end of the ureteral guide sheath 1 by a thread. The top seat 16 is rotatably arranged on the top of the base 15. The connecting pipe 11 passes through the top seat 16 and the base 15 in sequence, and the connecting pipe 11 and the top seat 16 are threaded together. The connecting pipe 11 and the base 15 are slidably connected. One end of the connecting pipe 11 is fixedly connected to one end of the inner pipe 2. The other end of the connecting pipe 11 is provided with a threaded connection part 17, which facilitates communication with the external water supply end through the threaded engagement.

[0025] One end of the inner tube 2 is fixedly connected to a sealing end 4. The diameter of the sealing end 4 is the same as the inner diameter of the inner tube 2. The sealing end 4 near the inner tube 2 is provided with a chamfer 14. The chamfer 14 facilitates the sealing end 4 to retract into the guide sheath of the guide tube. One end of the sealing end 4 is connected to a receiving end 5. One end of the sealing end 4 is located outside the ureteral guide sheath 1. The receiving end 5 is frustum-shaped, and the large diameter end face of the receiving end 5 is fixedly connected to the sealing end 4. The other end of the receiving end 5 is provided with a guide end 6. The diameter of the guide end 6 is the same as the small diameter end face of the receiving end 5. The inner tube 2, sealing end 4, receiving end 5 and guide end 6 are concentric and integrally formed. The connecting tube 11, inner tube 2, sealing end 4, receiving end 5 and guide end 6 are provided with through grooves 7. The side of the ureteral guide sheath 1 is connected to a guide sheath seat 9. The guide sheath seat 9 is tubular, and the inner cavity of the guide sheath seat 9 is connected to the discharge groove 3.

[0026] Example 2:

[0027] Please see Figure 5 A negative pressure lithotripsy ureteral guide sheath 1, which differs from Embodiment 1 in that the inner tube 2 has a circular cross-section, and the diameter of the inner tube 2 is the same as the inner diameter of the ureteral guide sheath 1. Several guide grooves 12 are uniformly opened on the outer surface of the inner tube 2.

[0028] Example 3:

[0029] Please see Figure 6A negative pressure lithotripsy ureteral guide sheath 1, which differs from Embodiment 1 in that the inner tube 2 has a circular cross-section, and the diameter of the inner tube 2 is the same as the inner diameter of the ureteral guide sheath 1. A spiral groove 13 is provided on the outer surface of the inner tube 2.

[0030] Working principle:

[0031] The ureteral guide sheath 1 is easily inserted into the upper end of the ureter via the guide end 6 and the receiving end 5. By rotating the top seat 16, which is threadedly engaged with the connecting pipe 11, the top seat 16 pushes the connecting pipe 11 to move. The connecting pipe 11 moves the inner pipe 2, which in turn pushes the sealing end 4, the receiving end 5, and the guide end 6 until the sealing end 4 is removed from the ureteral guide sheath 1, exposing the discharge groove 3. Water is then injected into the through groove 7 through the connecting pipe 11. A negative pressure device is then connected to one end of the guide sheath, which draws negative pressure into the discharge groove 3. The water and broken stones inside the through groove 7 are then discharged from the body through the discharge groove 3, avoiding the trouble of secondary cleaning and improving efficiency.

Claims

1. A negative pressure lithotripsy ureteral guiding sheath (1), characterized in that: The device includes a ureteral guiding sheath (1), inside which is an inner tube (2). A discharge groove (3) is formed between the inner tube (2) and the guiding sheath. A sealing end (4) is fixedly connected to one end of the inner tube (2). The diameter of the sealing end (4) is the same as the inner diameter of the inner tube (2). A receiving end (5) is connected to one end of the sealing end (4). One end of the sealing end (4) is located outside the ureteral guiding sheath (1). The receiving end (5) is frustoconical, and the large-diameter end face of the receiving end (5) is fixedly connected to the sealing end (4). The other end of the receiving end (5) is provided with a guide end (6). The diameter of the guide end (6) is the same as the diameter of the small diameter end face of the receiving end (5). The inner tube (2), the sealing end (4), the receiving end (5) and the guide end (6) are provided with through grooves (7). The end of the ureteral guide sheath (1) away from the guide end (6) is provided with an expansion base (8) for moving the inner tube (2). The side of the ureteral guide sheath (1) is connected to a guide sheath seat (9). The guide sheath seat (9) is tubular, and the inner cavity of the guide sheath seat (9) is connected to the discharge groove (3).

2. The negative pressure lithotripsy ureteral guiding sheath (1) according to claim 1, characterized in that: The expansion base (8) includes an end seat (10) and a connecting tube (11). The end seat (10) is rotatably arranged at one end of the ureteral guide sheath (1). The connecting tube (11) passes through the end seat (10), and the connecting tube (11) and the end seat (10) are threaded together. One end of the connecting tube (11) is fixedly connected to one end of the inner tube (2).

3. The negative pressure lithotripsy ureteral guiding sheath (1) according to claim 1, characterized in that: The inner tube (2) has a circular cross-section, and the diameter of the inner tube (2) is smaller than the inner diameter of the ureteral guide sheath (1).

4. The negative pressure lithotripsy ureteral guiding sheath (1) according to claim 1, characterized in that: The inner tube (2) has a circular cross-section, and the diameter of the inner tube (2) is the same as the inner diameter of the ureteral guide sheath (1). The outer surface of the inner tube (2) is uniformly provided with a number of guide grooves (12).

5. The negative pressure lithotripsy ureteral guiding sheath (1) according to claim 1, characterized in that: The inner tube (2) has a circular cross-section, and the diameter of the inner tube (2) is the same as the inner diameter of the ureteral guide sheath (1). The outer surface of the inner tube (2) is provided with a spiral groove (13).

6. The negative pressure lithotripsy ureteral guiding sheath (1) according to claim 3, characterized in that: The sealing end (4) near the inner tube (2) is provided with a chamfer (14).

7. The negative pressure lithotripsy ureteral guiding sheath (1) according to claim 1, characterized in that: The inner tube (2), sealing end (4), receiving end (5) and guiding end (6) are concentric and integrally formed.

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