Ureteral guide sheath
By adding a side cavity at the main lumen of the ureteral guide sheath and setting a sealing design, the problem of saline leakage affecting surgical operation was solved, and the stability of fluid leakage from the side cavity and the stability of surgical operation were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GEYI MEDICAL INSTR
- Filing Date
- 2025-02-10
- Publication Date
- 2026-06-30
AI Technical Summary
During the insertion of the ureteral guiding sheath, saline solution flowed directly out of the main lumen, affecting the surgical procedure.
A side cavity is added at the main lumen of the ureteral guiding sheath, and a sealing design is set at the main lumen to allow fluid to flow out from the side cavity. Stability is ensured by the locking structure and sealing cooperation between the rotating cap and the outer tube seat.
This effectively prevents fluid from flowing out of the main cavity and redirects it to flow out of the side cavity, avoiding any impact on the surgeon and improving the stability and efficiency of the surgical procedure.
Smart Images
Figure CN224421086U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of surgical instruments, and in particular to a ureteral guiding sheath. Background Technology
[0002] Clinically, when the human body experiences ureteral obstruction or stones, surgical procedures are required. During surgery, a surgical channel needs to be established to guide instruments or perform other procedures to facilitate the operation. A commonly used method is to use a ureteral guiding sheath in conjunction with a flexible ureteroscope. The ureteral guiding sheath is inserted through the urethral orifice and then through the bladder and ureter to establish the working channel for the flexible ureteroscope. Ureteroscopic lithotripsy is a commonly used surgical procedure for treating urinary system stones. During the procedure, the flexible ureteroscope, guided by the ureteral guiding sheath, travels retrogradely through the patient's urethra to the bladder, ureter, and finally to the renal pelvis. The stones are then broken up using a holmium laser lithotripter or an ultrasonic lithotripter.
[0003] During ureteral guiding sheath insertion, gravity flushing with normal saline is generally used to maintain low intrarenal pressure, with a pressure not exceeding 40 cm water column (approximately 4 kPa). During insertion or surgery, normal saline may flow directly out of the main lumen of the ureteral guiding sheath, affecting the surgeon's operation. Utility Model Content
[0004] To address the aforementioned problems, this invention proposes a ureteral guiding sheath that adds a side cavity at the main lumen location and incorporates a sealing design at the main lumen to prevent fluid from flowing out of the main lumen and instead direct it to flow out of the side cavity.
[0005] The technical solution adopted by this utility model is as follows:
[0006] A ureteral guiding sheath includes an outer tube seat and a dilator seat. An outer sheath tube is connected to the outer tube seat, and a dilator tube is connected to the dilator seat. The dilator tube and the outer sheath tube are fitted together. The sheath also includes a rotating cap with an dilator opening. The dilator seat has an elastic buckle that engages with the dilator opening. The outer tube seat has a tightening port, and the rotating cap has a tightening buckle that engages with the tightening port. The outer sheath tube and the outer tube seat are indirectly sealed together. A side tube is provided on the outer tube seat, and the main cavity of the outer tube seat communicates with the side cavity of the side tube.
[0007] In this type of ureteral guiding sheath, the dilator is equipped with an elastic buckle, and the rotating cap is equipped with an dilator slot. The rotating cap and the dilator are engaged together by the elastic buckle and the dilator slot, providing good stability in their engagement. The rotating cap is also equipped with a tightening buckle, and the outer tube seat has a tightening and fixing port. Because the tightening buckle and the tightening and fixing port engage together, the rotating cap can be stably engaged with the outer tube seat. Therefore, in this type of ureteral guiding sheath, the rotating cap and the outer tube seat are equipped with an engagement structure, and the rotating cap and the dilator are equipped with an engagement structure, ensuring good stability among the dilator, the rotating cap, and the outer tube seat, and ensuring the overall stability of the ureteral guiding sheath.
[0008] In this design, a side cavity is provided on one side of the main cavity. Due to the indirect sealing fit between the outer sheath and the inner wall of the outer tube seat, it is equivalent to adding a sealing design at the main cavity, which can prevent the liquid from flowing out of the main cavity and instead allow it to flow out of the side cavity.
[0009] In summary, this guiding sheath adds a side cavity to the main cavity and incorporates a sealing design at the main cavity to prevent fluid from flowing out of the main cavity, instead allowing it to flow out through the side cavity, thus avoiding any impact on the surgical operator.
[0010] Optionally, an auxiliary fixing sleeve is also included. The auxiliary fixing sleeve is disposed inside the outer tube seat and is located between the rotating pressure cap and the outer tube seat. The wall of the expansion hole on the auxiliary fixing sleeve is close to the outer tube wall of the expansion tube.
[0011] The auxiliary fixing sleeve serves two purposes: first, to seal between the rotating gland and the outer tube seat; and second, to seal and clamp the expansion tube.
[0012] Optionally, the screw-on sealing cover on the auxiliary fixing sleeve is pressed tightly against the sealing plane inside the outer tube seat.
[0013] Tightening the cover to fit tightly against the sealing surface ensures the stability of the fit between the rotating gland and the outer tube seat.
[0014] Optionally, the auxiliary fixing sleeve is provided with a mating groove, and the rotating pressure cover is provided with a mating ring, the mating ring and the mating groove being mated together.
[0015] After the mating groove and the mating ring are engaged, the auxiliary fixing sleeve is fixed on the rotating pressure plate.
[0016] Optionally, the outer tube seat is provided with an external mating hole, and the outer sheath tube is inserted into and mated with the external mating hole.
[0017] Optionally, the expansion seat is provided with an inner mating hole, and the expansion tube is inserted into and mated with the inner mating hole.
[0018] Optionally, the expansion seat is provided with a Luer connector, which is connected to the inner mating hole through an injection channel.
[0019] The beneficial effects of this utility model are: by adding a side cavity at the main cavity position and adding a sealing design at the main cavity, the liquid is prevented from flowing out of the main cavity and instead flows out of the side cavity, thus avoiding any impact on the surgical operator. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0021] Figure 1 This is a simplified schematic diagram of the ureteral guiding sheath structure;
[0022] Figure 2 This is a simplified diagram illustrating the fit between the expansion seat and the outer sheath.
[0023] Figure 3 This is a schematic diagram showing the fit between the rotating gland and the outer tube seat;
[0024] Figure 4 This is a simplified schematic diagram of the expansion seat structure;
[0025] Figure 5 This is a simplified schematic diagram of the outer tube seat structure;
[0026] Figure 6 This is a simplified schematic diagram of the rotating cap structure;
[0027] Figure 7 This is a simplified schematic diagram of the auxiliary fixing sleeve.
[0028] The figures are labeled as follows: 1. Expansion seat; 101. Elastic buckle; 102. Inner mating hole; 103. Luer connector; 104. Injection channel; 2. Rotary cap; 201. Expansion bayonet; 202. Tightening buckle; 203. Mating ring; 3. Outer tube seat; 301. Side tube; 302. Outer mating hole; 303. Sealing plane; 304. Tightening fixing port; 4. Outer sheath; 5. Expansion tube; 6. Auxiliary fixing sleeve; 601. Expansion hole; 602. Mating groove; 603. Tightening cover. Detailed Implementation
[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0031] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0032] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and appendix Figure 7 As shown, a ureteral guiding sheath includes an outer tube seat 3 and a dilator seat 1. An outer sheath tube 4 is connected to the outer tube seat 3, and a dilator tube 5 is connected to the dilator seat 1. The dilator tube 5 and the outer sheath tube 4 are fitted together. The sheath also includes a rotating cap 2 with an expansion slot 201. An elastic buckle 101 is provided on the dilator seat 1, which engages with the expansion slot 201. A tightening and fixing port 304 is provided on the outer tube seat 3, and a tightening buckle 202 is provided on the rotating cap 2. The tightening buckle 202 engages with the tightening and fixing port 304. The outer sheath tube 4 and the outer tube seat 3 are indirectly sealed together. A side tube 301 is provided on the outer tube seat 3, and the main cavity inside the outer tube seat 3 is connected to the side cavity of the side tube 301.
[0033] In this type of ureteral guiding sheath, the dilator 1 is provided with an elastic buckle 101, and the rotating cap 2 is provided with an dilation slot 201. The rotating cap 2 and the dilator 1 are engaged together by the elastic buckle 101 and the dilation slot 201, providing good stability in their engagement. The rotating cap 2 is also provided with a tightening buckle 202, and the outer tube seat 3 is provided with a tightening and fixing port 304. Because the tightening buckle 202 and the tightening and fixing port 304 engage together, the rotating cap 2 can be stably engaged with the outer tube seat 3. Therefore, in this type of ureteral guiding sheath, the rotating cap 2 and the outer tube seat 3 are engaged, and the rotating cap 2 and the dilator 1 are engaged, ensuring good stability among the dilator 1, the rotating cap 2, and the outer tube seat 3, and ensuring good stability of the entire ureteral guiding sheath.
[0034] In this design, a side cavity is provided on one side of the main cavity. Since there is an indirect sealing fit between the inner wall of the outer sheath tube 4 and the inner wall of the outer tube seat 3, it is equivalent to adding a sealing design at the main cavity, which can prevent the liquid from flowing out of the main cavity and instead allow it to flow out of the side cavity.
[0035] In summary, this guiding sheath adds a side cavity at the main cavity location and incorporates a sealing design at the main cavity to prevent fluid from flowing out of the main cavity, instead allowing it to flow out through the side cavity, thus avoiding any impact on the surgical operator.
[0036] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and appendix Figure 7 As shown, it also includes an auxiliary fixing sleeve 6, which is disposed inside the outer tube seat 3 and is located between the rotating pressure cap 2 and the outer tube seat 3. The wall of the expansion hole 601 on the auxiliary fixing sleeve 6 is close to the outer tube wall of the expansion tube 5.
[0037] The auxiliary fixing sleeve 6 serves two purposes: first, to seal between the rotating pressure cap 2 and the outer tube seat 3; and second, to seal and clamp the expansion tube 5.
[0038] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and appendix Figure 7 As shown, the screw-on sealing cover 603 on the auxiliary fixing sleeve 6 is tightly attached to the sealing plane 303 inside the outer tube seat.
[0039] Tightening the cover 603 to fit tightly against the sealing plane 303 ensures the stability of the fit between the rotating gland 2 and the outer tube seat 3.
[0040] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and appendix Figure 7 As shown, the auxiliary fixing sleeve 6 is provided with a mating groove 602, and the rotating pressure cover 2 is provided with a mating ring 203, which is mated with the mating groove 602.
[0041] After the mating groove 602 and the mating ring 203 are engaged, the auxiliary fixing sleeve 6 is fixed to the rotating pressure cover 2.
[0042] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and appendix Figure 7 As shown, the outer tube seat 3 is provided with an outer mating hole 302, and the outer sheath tube 4 is inserted and mated with the outer mating hole 302.
[0043] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and appendix Figure 7 As shown, the expansion seat 1 is provided with an inner mating hole 102, and the expansion tube 5 is inserted into and mated with the inner mating hole 102.
[0044] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and appendix Figure 7 As shown, the expansion seat 1 is provided with a Luer connector 103, which is connected to the inner mating hole 102 through the injection channel 104.
[0045] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A ureteral guiding sheath, comprising an outer sheath seat and a dilator seat, wherein an outer sheath tube is connected to the outer sheath seat, and a dilator tube is connected to the dilator seat, the dilator tube cooperating with the outer sheath tube, characterized in that, It also includes a rotating cap with an expansion slot, an expansion seat with an elastic buckle that engages with the expansion slot, an outer tube seat with a tightening port, a rotating cap with a tightening buckle that engages with the tightening port, an outer sheath and an outer tube seat with an indirect sealing fit, and a side tube on the outer tube seat with the main cavity inside the outer tube seat communicating with the side cavity of the side tube.
2. The ureteral guiding sheath according to claim 1, characterized in that, It also includes an auxiliary fixing sleeve, which is disposed inside the outer tube seat and located between the rotating pressure cap and the outer tube seat. The wall of the expansion hole on the auxiliary fixing sleeve is close to the outer tube wall of the expansion tube.
3. A ureteral guiding sheath according to claim 2, characterized in that, The screw-on sealing cover on the auxiliary fixing sleeve is tightly fitted to the sealing plane inside the outer tube seat.
4. A ureteral guiding sheath according to claim 2, characterized in that, The auxiliary fixing sleeve is provided with a mating groove, and the rotating pressure cover is provided with a mating ring, which is mated with the mating groove.
5. A ureteral guiding sheath according to claim 1, characterized in that, The outer tube seat is provided with an external mating hole, and the outer sheath tube is inserted into and mated with the external mating hole.
6. A ureteral guiding sheath according to claim 1, characterized in that, The expansion seat is provided with an inner mating hole, and the expansion tube is inserted into and mated with the inner mating hole.
7. A ureteral guiding sheath according to claim 6, characterized in that, The expansion seat is provided with a Luer connector, and the Luer connector is connected to the inner mating hole through an injection channel.