Medical sheath

Abstract

The utility model discloses a medical sheath, and belongs to the technical field of medical instruments. Comprising a working sheath and a matching sheath, the matching sheath comprises a matching sheath tube and a matching sheath tube seat, the matching sheath tube seat comprises a fixing part, the matching sheath tube is connected to one end of the fixing part, a clamping column is arranged at the other end of the fixing part, the fixing part is axially provided with a hollow cavity with the inner diameter changing in a stepped mode, and the clamping column is axially provided with a through cavity with the inner diameter changing in a stepped mode. Detachable nuts are arranged at the ends, away from the fixing pieces, of the clamping columns. The working sheath is connected and matched with the matching sheath, an installation foundation is provided for the endoscope, the endoscope is integrated in the medical sheath, direct-view observation and real-time operation in the sheath entering process are achieved, the sheath entering difficulty and the ureter injury risk caused by a view blind area in traditional sheath entering operation are effectively solved, and the sheath entering efficiency is improved through real-time image feedback of the endoscope. An operator can adjust the sheath entering angle and force, the operation safety and success rate are improved, the medical sheath does not need ray assistance, and potential hazards of ray radiation to the operator and a patient are avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a medical sheath. Background Technology

[0002] Currently, as the effectiveness of endoscopic technology in medicine has been verified, endoscopic treatment techniques have also been further developed, especially in the treatment of urinary system stones. The development of disposable flexible endoscopes has made the surgery more minimally invasive and more acceptable to the public, and postoperative complications are also controllable. At present, urinary system stones are treated under endoscopic guidance, and the stones broken up by laser or other energy are suctioned out of the body through a medical sheath under negative pressure, thus completing the treatment of the disease.

[0003] However, the current clinical methods for inserting the sheath are mostly guide wire-guided insertion or insertion under X-ray observation. Guide wire-guided insertion relies on the doctor's experience. There may be special conditions in the patient, such as local ureteral stenosis. If the preoperative assessment is insufficient, it may lead to difficulty in inserting the sheath or damage to the ureter during the insertion process. In addition, if insertion is performed under X-ray observation, it will cause certain radiation damage to the operator.

[0004] In view of this, the present invention is proposed to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a medical sheath to solve the technical problem in the prior art where it is difficult to insert the medical sheath, resulting in ureteral damage and the inability to observe the damage in real time.

[0006] The technical solution of this utility model is: a medical sheath, comprising:

[0007] The working sheath includes a sheath tube and a sheath tube seat, with the sheath tube connected to the sheath tube seat;

[0008] The mating sheath includes a mating sheath tube and a mating sheath tube seat. The mating sheath tube seat includes a fixing member. The mating sheath tube is connected to one end of the fixing member. A locking post is provided at the other end of the fixing member. The fixing member has a hollow cavity with a stepped inner diameter in the axial direction. The locking post has a through cavity with a stepped inner diameter in the axial direction. The through cavity is connected to the hollow cavity. A detachable nut is provided at the end of the locking post opposite to the fixing member. The fixing member and the sheath tube seat are detachably connected.

[0009] Furthermore, the sheath includes a soft segment and a hard segment connected to each other, the hard segment being connected to the sheath seat, and a first metal spring support tube being provided within the soft segment and the hard segment along their length.

[0010] Furthermore, the sheath seat includes a negative pressure connector, a negative pressure inclined branch is connected to the negative pressure connector, one end of the negative pressure inclined branch opposite to the negative pressure connector is connected to an external negative pressure source, and an opening groove is provided on the negative pressure inclined branch along its length direction, and a sliding slide is provided on the opening groove.

[0011] Furthermore, a sealing cap is fitted onto the outer peripheral wall of the negative pressure connector.

[0012] Furthermore, the mating sheath includes a soft section and a hard section. The hard section is connected to the fixing member, and the end of the hard section near the fixing member is connected to the hollow cavity. A second metal spring support tube is provided inside the soft section and the hard section along their length.

[0013] Furthermore, the soft segment of the sheath has a tip, which is made of transparent plastic.

[0014] Furthermore, the fastener has an annular groove along the circumferential direction of the peripheral wall, and a silicone ring is placed in the annular groove. The fastener is interference-fitted with the negative pressure connector through the silicone ring.

[0015] Furthermore, the outer peripheral wall of the fastener away from the hard section of the sheath is an outer Luer structure, and the inner peripheral wall of the pin near the fastener is an inner Luer structure. The fastener and the pin are fixedly connected through the outer Luer structure and the inner Luer structure.

[0016] Furthermore, a hollow flexible tube is provided inside the through cavity. The outer peripheral wall of the end of the locking post facing away from the fixing member is provided with an external thread. The nut is provided with an internal thread that matches the external thread. The nut has a hollow cylinder that can be inserted into the through cavity of the locking post. The nut is threadedly connected to the fixing member. When the nut rotates towards the locking post, the hollow cylinder of the nut compresses the hollow flexible tube, thereby changing the inner diameter of the cavity of the hollow flexible tube.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects:

[0018] The connection and cooperation between the working sheath and the matching sheath provide a stable mounting base for the endoscope, allowing it to be integrated into the medical sheath. This enables direct observation and real-time operational control of the insertion process, effectively solving the difficulties in insertion and the risk of ureteral injury caused by blind spots in traditional sheath insertion procedures. Through real-time image feedback from the endoscope, the operator can adjust the insertion angle and force, significantly improving operational safety and success rate. In addition, the medical sheath does not rely on radiation-assisted positioning, avoiding the potential harm of radiation to the operator and patient. While ensuring visualization of clinical operations, it achieves a radiation-free safe operating environment, combining technological advancement with clinical practicality. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the medical sheath provided in this embodiment of the application;

[0021] Figure 2 This is a schematic diagram of the structure of the working sheath of the medical sheath provided in this embodiment of the application;

[0022] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is a schematic diagram of the structure of the medical sheath provided in this embodiment of the application;

[0025] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure;

[0026] Figure 7 for Figure 6 Enlarged view at point B in the middle;

[0027] Figure 8 This is a schematic diagram of the assembly of the medical sheath and endoscope provided in this embodiment of the application.

[0028] Reference numerals: 1. Working sheath; 2. Mating sheath; 3. Endoscope; 4. Endoscope tip; 11. Sheath seat; 12. Soft segment of sheath; 13. Hard segment of sheath; 111. Sealing cap; 112. Sliding plate; 113. Negative pressure connector; 141. First metal spring support tube; 21. Mating sheath seat; 22. Soft segment of sheath; 23. Hard segment of sheath; 211. Silicone ring; 212. Hollow flexible tube; 213. Nut; 214. Fixing element; 215. Clamping post; 221. Tip.

[0029] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in further detail with reference to the accompanying drawings.

[0031] See Figures 1 to 8 As shown in the embodiment of this application, a medical sheath is provided, including: a working sheath 1 and a matching sheath 2. The working sheath 1 includes a sheath tube and a sheath tube seat 11, with the sheath tube connected to the sheath tube seat 11. The matching sheath 2 includes a matching sheath tube and a matching sheath tube seat 21. The matching sheath tube seat 21 includes a fixing member 214, with the matching sheath tube connected to one end of the fixing member 214. A locking post 215 is provided at the other end of the fixing member 214. The fixing member 214 has an axially formed hollow cavity with a stepped inner diameter. The locking post 215 has an axially formed through cavity with a stepped inner diameter, which is connected to the hollow cavity. A detachable nut 213 is provided at the end of the locking post 215 opposite to the fixing member 214. The fixing member 214 is detachably connected to the sheath tube seat 11.

[0032] In the above solution, by connecting the working sheath 1 and the matching sheath 2, the endoscope 3 can be installed in the medical sheath provided in this application embodiment, so as to realize direct observation of the endoscope 3 and perform sheath insertion operation in real time, avoiding the current situation of difficulty in sheath insertion and the inability to observe ureteral injury in real time. The medical sheath provided in this application embodiment does not require radiation-assisted operation, thus avoiding radiation damage to the operator.

[0033] See some possible implementations. Figures 2 to 4 As shown, the sheath includes a soft section 12 and a hard section 13 connected to each other. The hard section 13 is connected to the sheath seat 11. A first metal spring support tube 141 is provided inside the soft section 12 and the hard section 13 along their length direction.

[0034] It should be noted that the first metal spring support tube 141 is a plastic tube of different hardness with internal metal spring support. The first metal spring support tube 141 in the soft section 12 of the sheath is a low-hardness plastic tube with internal metal spring support, and the first metal spring support tube 141 in the hard section 13 of the sheath is a high-hardness plastic tube with internal metal spring support.

[0035] See some possible implementations. Figures 1 to 3 As shown, the sheath seat 11 includes a negative pressure connector 113, a negative pressure inclined branch is connected to the negative pressure connector 113, one end of the negative pressure inclined branch away from the negative pressure connector 113 is connected to an external negative pressure source, an opening groove is provided on the negative pressure inclined branch along its length direction, and a sliding piece 112 is provided on the opening groove, the sliding piece 112 can slide to completely cover the opening groove.

[0036] In the above scheme, when adjusting the intensity of negative pressure attraction inside the medical sheath, the slider 112 is slid to cover the opening groove, and the opening size of the opening groove is adjusted, thereby completing the adjustment of the intensity of negative pressure attraction inside the medical sheath.

[0037] See some possible implementations. Figures 1 to 3 As shown, a sealing cap 111 is fitted on the outer peripheral wall of the negative pressure connector 113. After the sheath is inserted and the mating sheath 2 is removed, the sealing cap 111 can be connected to the negative pressure connector 113. A conical hole is provided in the center of the sealing cap 111. At this time, the endoscope 3 is inserted into the working sheath 1 through the conical hole of the sealing cap 111 to work. The conical hole of the sealing cap 111 is press-fitted with the endoscope to prevent the water entering from the endoscope 3 from flowing out through the conical hole of the sealing cap 111.

[0038] See some possible implementations. Figure 5 and Figure 6 As shown, the mating sheath includes a soft section 22 and a hard section 23. The hard section 23 is connected to the fixing member 214, and the end of the hard section 23 near the fixing member 214 is connected to the hollow cavity. A second metal spring support tube is provided inside the soft section 22 and the hard section 23 along their length direction.

[0039] It should be noted that the second metal spring support tube is a plastic tube of different hardness with internal metal spring support. The second metal spring support tube in the soft section 22 of the matching sheath is a low-hardness plastic tube with internal metal spring support, and the second metal spring support tube in the hard section 23 of the matching sheath is a high-hardness plastic tube with internal metal spring support.

[0040] See some possible implementations. Figure 6 and Figure 7 As shown, the soft segment 22 of the sheath has a tip 221, which is made of transparent plastic to enhance the field of vision under the endoscope 3 and facilitate the auxiliary operation of the surgery. The tip 221 penetrates through the soft segment 12 of the sheath.

[0041] See some possible implementations. Figure 5 and Figure 6 As shown, the fixing member 214 has an annular groove along the circumferential direction of the peripheral wall, and a silicone ring 211 is provided in the annular groove. The fixing member 214 is interference-fitted with the negative pressure connector 113 through the silicone ring 211.

[0042] In the above scheme, when the fixing member 214 is inserted into the negative pressure connector 113, the silicone ring 211 and the negative pressure connector 113 are interference-fitted, which increases the friction between the silicone ring 211 and the negative pressure connector 113, making it difficult to slide relative to each other when no external force is applied.

[0043] See some possible implementations. Figure 5 and Figure 6As shown, the outer peripheral wall of the fastener 214 away from the hard section 23 of the sheath is an outer Luer structure, and the inner peripheral wall of the pin 215 near the fastener 214 is an inner Luer structure. The fastener 214 and the pin 215 are fixedly connected by the outer Luer structure and the inner Luer structure.

[0044] See some possible implementations. Figure 5 and Figure 6 As shown, a hollow flexible tube 212 is provided inside the through cavity. The outer peripheral wall of the end of the locking post 215 facing away from the fixing member 214 is provided with an external thread. The nut 213 is provided with an internal thread that matches the external thread. The nut 213 has a hollow cylinder that can be inserted into the through cavity of the locking post 215. The nut 213 is threadedly connected to the fixing member 214. When the nut 213 rotates towards the fixing member 214, the hollow cylinder of the nut 213 compresses the hollow flexible tube 212, thereby changing the inner diameter of the cavity of the hollow flexible tube 212.

[0045] In the above scheme, when installing the endoscope 3, the endoscope 3 is passed sequentially through the nut 213, the hollow flexible tube 212, the retaining post 215, the fixing member 214, the hard section 23 of the matching sheath and the soft section 22 of the matching sheath, and then inserted into the matching sheath 2 until the endoscope tip 4 abuts against the tip 221 of the matching sheath 2. When the nut 213 is rotated toward the fixing member 214, the hollow cylinder of the nut 213 compresses the hollow flexible tube 212, thereby reducing the inner diameter of the cavity of the hollow flexible tube 212, and thus fixing the endoscope 3 through the hollow flexible tube 212.

[0046] Working principle

[0047] First, the selected endoscope 3 is passed sequentially through the nut 213, hollow flexible tube 212, retainer 215, fixing member 214, hard section 23 of the fitting sheath, and soft section 22 of the fitting sheath. It is then inserted into the fitting sheath 2 until the endoscope tip 4 abuts against the tip 221 of the fitting sheath 2. When the nut 213 rotates towards the fixing member 214, the hollow cylinder of the nut 213 compresses the hollow flexible tube 212 within the cavity of the retainer 215, causing the hollow flexible tube 212 to deform. 212. The inner cavity size is reduced, and the inserted endoscope 3 is locked and fixed. At this time, the endoscope 3 and the mating sheath 2 are fixed as one unit. Then, the fixed endoscope 3 and the mating sheath 2 are inserted together into the negative pressure connector 113 of the working sheath 1 until the mating sheath seat 21 is blocked by the sheath seat 11 and cannot be pushed. At this time, the silicone ring 211 and the sheath seat 11 of the working sheath 1 are interference-fitted, so that the two are not easy to slide relative to each other when no external force is applied. At this time, the product assembly is completed. Figure 8 As shown, the assembled product is then inserted into the sheath in real time under direct observation of the endoscope 3.

[0048] This specific embodiment is merely an explanation of the utility model and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection of this utility model.

Claims

1. A medical sheath, characterized in that, include: Working sheath (1), the working sheath (1) includes a sheath tube and a sheath tube seat (11), the sheath tube being connected to the sheath tube seat (11); The sheath (2) includes a sheath tube and a sheath tube seat (21). The sheath tube seat (21) includes a fixing member (214). The sheath tube is connected to one end of the fixing member (214). The other end of the fixing member (214) is provided with a locking post (215). The fixing member (214) has a hollow cavity with a stepped inner diameter in the axial direction. The locking post (215) has a through cavity with a stepped inner diameter in the axial direction. The through cavity is connected to the hollow cavity. The locking post (215) is provided with a detachable nut (213) at the end away from the fixing member (214). The fixing member (214) is detachably connected to the sheath tube seat (11).

2. The medical sheath according to claim 1, characterized in that, The sheath includes a soft segment (12) and a hard segment (13) connected to each other. The hard segment (13) is connected to the sheath seat (11). A first metal spring support tube (141) is provided in the soft segment (12) and the hard segment (13) along their length direction.

3. The medical sheath according to claim 2, characterized in that, The sheath seat (11) includes a negative pressure connector (113), and a negative pressure inclined branch is connected to the negative pressure connector (113). The end of the negative pressure inclined branch away from the negative pressure connector (113) is connected to an external negative pressure source. An opening groove is provided on the negative pressure inclined branch along its length direction, and a sliding slide (112) is provided on the opening groove.

4. The medical sheath according to claim 3, characterized in that, A sealing cap (111) is fitted on the outer peripheral wall of the negative pressure connector (113).

5. The medical sheath according to claim 4, characterized in that, The mating sheath includes a soft section (22) and a hard section (23). The hard section (23) is connected to the fixing member (214), and the end of the hard section (23) near the fixing member (214) is connected to the hollow cavity. A second metal spring support tube is provided inside the soft section (22) and the hard section (23) along their length direction.

6. The medical sheath according to claim 5, characterized in that, The soft segment (22) of the sheath has a tip (221) which is made of transparent plastic.

7. The medical sheath according to claim 5, characterized in that, The fixing member (214) has an annular groove along the circumferential direction of the peripheral wall, and a silicone ring (211) is provided in the annular groove. The fixing member (214) is press-fitted with the negative pressure connector (113) through the silicone ring (211).

8. The medical sheath according to claim 5, characterized in that, The outer peripheral wall of the fixing member (214) facing away from the hard section (23) of the sheath is an outer Luer structure, and the inner peripheral wall of the locking post (215) near the fixing member (214) is an inner Luer structure. The fixing member (214) and the locking post (215) are fixedly connected by the outer Luer structure and the inner Luer structure.

9. The medical sheath according to claim 1, characterized in that, A hollow flexible tube (212) is provided inside the through cavity. The outer peripheral wall of the end of the locking post (215) facing away from the fixing member (214) is provided with an external thread. The nut (213) has an internal thread that matches the external thread provided on the outer peripheral wall of the end of the locking post (215) facing away from the fixing member (214). The nut (213) is connected to the external thread of the fixing member (214) through the internal thread. The nut (213) has a hollow cylinder that can be inserted into the through cavity of the locking post (215). When the nut (213) rotates towards the locking post (215), the hollow cylinder of the nut (213) squeezes the hollow flexible tube (212), thereby changing the inner diameter of the cavity of the hollow flexible tube (212).

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