A negative pressure suction sheath

Abstract

The utility model relates to the technical field of medical devices, in particular to a negative pressure suction sheath; comprising a multi-lumen tube, an interface and a sheath tube; the multi-lumen tube comprises an operating tube and a negative pressure connecting tube, and the negative pressure connecting tube is provided with an air introduction hole and an adjustment switch; the sheath tube is detachably connected to the operating tube through the interface, and an air through hole is provided in the sheath tube, the air introduction hole is connected with the air through hole to form an air inlet channel, and the operating tube is connected with the sheath tube to form a negative pressure water outlet channel; by providing an air through channel in the sheath tube and an air introduction hole on the negative pressure connecting tube, and connecting the air introduction hole with the air through hole to form an air inlet channel; effectively avoiding the phenomenon of mucosal damage in the human body caused by excessive negative pressure adsorption during operation; further, by providing an adjustment switch on the negative pressure connecting tube, the locking control of the negative pressure is realized, so that the water flow pressure and the air pressure during the stone suction operation are more stable and uniform, and the pain caused to the patient by excessive local pressure is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a negative pressure suction sheath. Background Art

[0002] In recent years, more and more percutaneous nephrolithotomy has been performed. In urinary system stone lithotripsy, with the increase of lithotripsy energy, the stone drift rate also gradually increases, and the drift range also gradually increases. Drifting stones require further surgical treatment, such as ureteroscopic lithotripsy, ureteroscopic lithotripsy, and percutaneous nephrolithotomy, which not only increase the patient's pain and prolong the operation time, but also increase the risk of postoperative infection and fever and medical costs; more importantly, the residual stone fragments will become new stone cores, leading to secondary upper urinary tract infection and renal colic, bringing more pain to patients.

[0003] Therefore, reducing intraoperative stone drift and increasing stone clearance rate are important issues faced in urinary stone lithotripsy. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a negative pressure suction sheath to solve the problem in the prior art that stone drift increases the risk of postoperative infection and fever and increases medical costs.

[0005] The utility model discloses a negative pressure suction sheath, which comprises a multi-lumen tube, an interface and a sheath tube; the multi-lumen tube comprises an operating tube and a negative pressure connecting tube, and the negative pressure connecting tube is provided with an air introduction hole and an adjustment switch; the sheath tube is detachably connected to the operating tube through the interface, and an air through hole is provided in the sheath tube, the air introduction hole is connected with the air through hole to form an air inlet channel, and the operating tube is connected with the sheath tube to form a negative pressure water outlet channel.

[0006] Optionally, the regulating switch includes a movable valve and a plurality of regulating holes arranged on the negative pressure connecting tube, and the movable valve is sleeved on the negative pressure connecting tube and can move relative to the negative pressure connecting tube to avoid or block the air inlet hole and the plurality of regulating holes.

[0007] Optionally, the air through hole is arranged in the tube wall of the sheath tube and is isolated from the negative pressure water outlet channel.

[0008] Optionally, the sheath tube is coaxially arranged with the operation tube.

[0009] Optionally, an extension portion is provided at one end of the interface, and the interface is fixed to the operating tube via the extension portion.

[0010] Optionally, the outer wall of the extension portion is provided with an external thread, the inner wall of the operating tube is provided with an internal thread for matching with the external thread, and the extension portion is inserted into the operating tube and connected through threads.

[0011] Optionally, the inner diameter of the extension portion is greater than the inner diameter of the interface, so that a boss is formed at the connection between the extension portion and the interface.

[0012] Optionally, one end of the sheath tube is disposed in the interface, and the end of the sheath tube is flush with the boss.

[0013] Optionally, a fixing groove is provided on the operating tube.

[0014] Optionally, the sheath is a bendable sheath.

[0015] Compared with the prior art, the beneficial effects of the negative pressure suction sheath provided by the embodiment of the utility model are: by designing a negative pressure suction sheath, by setting an air passage in the sheath tube and setting an air inlet hole on the negative pressure connecting tube, and making the air inlet hole connected to the air passage in the sheath tube to form an air inlet passage; it effectively avoids the phenomenon of damage to the mucous membrane in the human body due to excessive negative pressure adsorption force during operation; further, by setting an adjustment switch on the negative pressure connecting tube, the locking control of the negative pressure is realized, so that during the stone suction operation, the water flow pressure and the air pressure are more stable and uniform, effectively avoiding the pain caused to the patient by excessive local pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 It is a schematic diagram of the structure of the negative pressure suction sheath provided in an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the sheath tube provided in an embodiment of the utility model;

[0019] Figure 3 This is a partial schematic diagram of the negative pressure suction sheath provided by the embodiment of the utility model Figure 1 ;

[0020] Figure 4 This is a partial schematic diagram of the negative pressure suction sheath provided by the embodiment of the utility model Figure 2 .

[0021] The reference numerals in the figures are:

[0022] 1. Multi-lumen tube; 2. Interface; 3. Sheath tube; 11. Operating tube; 12. Negative pressure connecting tube; 121. Adjusting switch; 122. Air inlet hole; 1211. Movable valve; 1212. Adjusting hole; 21. Extension part; 22. Boss; 31. Air through hole. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0024] like Figures 1 to 4 As shown, the utility model provides a specific embodiment of a negative pressure suction sheath.

[0025] A negative pressure suction sheath, reference Figure 1 and Figure 2 The negative pressure suction sheath includes a multi-lumen tube 1, an interface 2 and a sheath tube 3. The multi-lumen tube 1 is detachably connected to the sheath tube 3 through the interface 2. The multi-lumen tube 1 includes an operating tube 11 and a negative pressure connecting tube 12. The negative pressure connecting tube 12 is provided with an adjusting switch 121 and an air inlet hole 122; an air through hole 31 is provided in the sheath tube 3, and the air inlet hole 122 is connected with the air through hole 31 to form an air inlet channel. The operating tube 11 is connected with the sheath tube 3 to form a negative pressure water outlet channel.

[0026] Specifically, refer to Figure 1 and Figure 2 The negative pressure suction sheath is a medical auxiliary device used in urological surgery. The negative pressure suction sheath can generate negative pressure during the operation. On the one hand, it can reduce the pressure inside the organ, thereby ensuring a clear field of vision during the operation; on the other hand, through the cooperation of the negative pressure suction sheath and the introducer sheath, it can suck out the gravel and bleeding generated during the operation to improve the stone clearance rate.

[0027] Further, refer to Figure 1 The negative pressure suction sheath includes a multi-lumen tube 1, an interface 2 and a sheath tube 3. The sheath tube 3 is used to provide a channel for medical devices to enter the human body; the multi-lumen tube 1 generally has multiple catheters to facilitate multiple treatment operations at the same time; the interface 2 is used to connect the sheath tube 3 and the multi-lumen tube 1; wherein the multi-lumen tube 1 is detachably connected to the sheath tube 3 through the interface 2, which not only has a simple structure, but also is easy to disassemble and assemble.

[0028] Further, refer to Figure 1 and Figure 2The air inlet hole 122 is used to introduce air. The air inlet hole 122 is connected with the air through hole 31 to form an air inlet channel, that is, external air can be introduced through the air inlet hole 122 and enter the air through hole 31, thereby entering the human body; the negative pressure connecting tube 12 is used to connect to an external negative pressure device to generate negative pressure, so as to discharge gas or liquid from the body to the outside under the action of negative pressure. Specifically, the operating tube 11 is connected to the sheath tube 3. When the negative pressure connecting tube 12 is connected to the external negative pressure device and generates negative pressure, the gas and liquid in the body will be discharged from the body through the sheath tube 3 and the operating tube 11 in turn. When the gas and liquid are discharged, the broken stones can be taken out of the body at the same time to achieve the discharge of broken stones.

[0029] Further, refer to Figure 1 and Figure 2 The negative pressure connecting pipe 12 is provided with an adjusting switch 121, which is used to lock and control the size of the negative pressure, so that during the stone suction operation, the water pressure and the air pressure are more stable and balanced, which can avoid excessive local pressure and increase the patient's pain; compared with the current manual pressing method, negative pressure control through the adjusting switch 121 is not only simpler and more convenient to operate, but also makes the control more stable.

[0030] In this embodiment, a negative pressure suction sheath is designed, an air introduction hole is provided, and the air introduction hole is connected with the air through hole in the sheath tube to form an air inlet channel, so as to realize the introduction of external air; the phenomenon of damage to the mucous membrane in the human body due to excessive negative pressure adsorption force during operation is effectively avoided; further, a regulating switch is provided on the negative pressure connecting tube, so that the locking control of the negative pressure is realized, so that during the stone suction operation, the water flow pressure and the air pressure are more stable and uniform, and the pain caused to the patient by excessive local pressure is effectively avoided.

[0031] In one embodiment, reference Figure 1 The regulating switch 121 includes a movable valve 1211 and a plurality of regulating holes 1212 arranged on the negative pressure connecting pipe. The movable valve 1211 is sleeved on the negative pressure connecting pipe 12 and can move relative to the negative pressure connecting pipe 12 to avoid or block the air inlet hole 122 and the plurality of regulating holes 1212.

[0032] Specifically, refer to Figure 1 and Figure 2The air introduction hole 122 is arranged at the outer end of the negative pressure connecting tube 12, and the multiple adjustment holes 1212 are all arranged at one end of the negative pressure connecting tube 12 close to the operating tube 11, that is, the multiple adjustment holes 1212 are arranged on the air inlet channel, and the movable valve 1211 is sleeved on the negative pressure connecting tube 12, and the movable valve 1211 can move on the negative pressure connecting tube 12. When performing kidney endoscopy or lithotripsy, the movable valve 1211 moves to the air introduction hole 122 to close the air inlet channel, and pushes the movable valve 1211 so that the movable valve 1211 faces the multiple adjustment holes 121 2 moves to cover part of the adjusting holes 1212, and the number of the adjusting holes 1212 to be covered is selected according to actual needs, so as to adjust the suction force. It should be noted that during the pushing operation, the active valve 1211 still covers the air inlet hole 122 to keep the air inlet channel closed; when sucking stones, the adjusting holes 1212 are continued to be pushed to completely cover the multiple adjusting holes 1212, and the active valve 1211 is removed from the air inlet hole 122, so as to maximize the suction and open the air inlet channel.

[0033] In one embodiment, reference Figure 1 The sheath tube 3 and the operating tube 11 are coaxially arranged.

[0034] Specifically, refer to Figure 1 The operating tube 11 can be used to guide external operating instruments into the sheath tube 3 and thus into the human body; by detachably connecting the sheath tube 3 and the operating tube 11 through the interface 2, the convenience of disassembly and assembly of the device can be effectively improved; by coaxially arranging the sheath tube 3 and the operating tube 11, the consistency between the sheath tube 3 and the operating tube 11 is stronger, making the process of external operating instruments entering the sheath tube 3 through the operating tube 11 to reach the stone location simpler and smoother.

[0035] In one embodiment, reference Figure 1 and Figure 3 An extension portion 21 is provided at one end of the interface 2, the outer wall of the extension portion 21 is provided with an external thread, the inner wall of the operating tube 11 is provided with an internal thread for matching with the external thread, and the extension portion 21 is inserted into the operating tube 11 and connected by threads.

[0036] Specifically, refer to Figure 1 and Figure 3 An extension portion 21 is provided at one end of the interface 2, and the other end of the interface 2 is connected to the sheath tube 3. By providing an internal thread on the inner wall of the operating tube 11 and an external thread on the outside of the extension portion 21, a threaded fixing structure can be formed so that the extension portion 21 is stably fixed in the operating tube 11, thereby connecting and fixing the sheath tube 3 to the operating tube 11.

[0037] Further, refer to Figure 1 and Figure 4 The inner diameter of the extension portion 21 is larger than the inner diameter of the interface 2 , and a boss 22 is formed at the connection between the extension portion 21 and the interface 2 .

[0038] Specifically, refer to Figure 1 and Figure 3 The extension part 21 is screwed into the operating tube 11 through a threaded fixing structure, the sheath tube 3 is directly inserted into the inner diameter of the interface 2, and its end is fixed by a boss 22 to limit the connection position of the sheath tube 3, thereby improving the connection stability between the extension part 21 and the sheath tube 3.

[0039] In one embodiment, reference Figure 1 and Figure 4 A mounting hole is provided in the interface 2 , and the sheath tube 3 is inserted into the mounting hole along the other end of the interface 2 toward the extension portion 21 , and the end of the sheath tube 3 is flush with the boss 22 .

[0040] Specifically, refer to Figure 1 and Figure 3 One end of the sheath 3 is inserted from the other end of the interface 2 and extends inward along the interface 2 toward the extension portion 21 until the end of the sheath 3 is flush with the plane of the boss 22. On the one hand, it can limit the sheath 3, and on the other hand, it makes the consistency between the sheath 3, the interface 2 and the operating tube 11 higher, making the process of external operating instruments entering the sheath 3 through the operating tube 11 to reach the stone location simpler and smoother.

[0041] In one embodiment, an air guide port is provided on the operating tube 11 , and the negative pressure connecting tube 12 is connected to the operating tube 11 through the air guide port.

[0042] In one embodiment, reference Figure 3 A fixing groove 111 is provided on the operating tube 11 .

[0043] Specifically, refer to Figure 3 The fixing groove 111 can facilitate the negative pressure suction sheath to be clamped and fixed or fixed in other ways, thereby improving the stability of the negative pressure suction sheath during use.

[0044] In one embodiment, reference Figure 2 The air through hole 31 is arranged in the tube wall of the sheath tube 3 and is isolated from the negative pressure water outlet channel.

[0045] Specifically, refer to Figure 2 A plurality of air holes 31 may be provided in the sheath tube 3. The plurality of air holes 31 are evenly distributed inside the tube wall of the sheath tube 3 and isolated from the inner channel of the sheath tube 3. The specific number of the air holes 31 may be designed according to actual needs.

[0046] Among them, the air inlet end of the air through hole 31 is set at one end of the sheath tube 3 and is connected to the air inlet hole 122, and the air outlet end of the air through hole 31 is set at the other end of the sheath tube 3 and is connected to the sheath tube 3, thereby realizing effective isolation of the air inlet channel and the air negative pressure water outlet channel.

[0047] In one of the embodiments, the sheath 3 is a flexible sheath. In endoscopes, catheters and other medical devices, the softness and bending properties of the flexible sheath can be utilized to enable accurate positioning and operation in tortuous channels inside the human body, providing doctors with better diagnostic and treatment methods.

[0048] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A negative pressure suction sheath, characterized in that: It comprises a multi-lumen tube, an interface and a sheath tube; the multi-lumen tube comprises an operating tube and a negative pressure connecting tube, the negative pressure connecting tube is provided with an air introduction hole and an adjustment switch; the sheath tube is detachably connected to the operating tube through the interface, an air through hole is provided in the sheath tube, the air introduction hole is connected with the air through hole to form an air inlet channel, and the operating tube is connected with the sheath tube to form a negative pressure water outlet channel.

2. The negative pressure suction sheath according to claim 1, characterized in that: The regulating switch includes a movable valve and a plurality of regulating holes arranged on the negative pressure connecting pipe. The movable valve is sleeved on the negative pressure connecting pipe and can move relative to the negative pressure connecting pipe to avoid or block the air inlet hole and the plurality of regulating holes.

3. The negative pressure suction sheath according to claim 1, characterized in that: The air through hole is arranged in the tube wall of the sheath tube and is isolated from the negative pressure water outlet channel.

4. The negative pressure suction sheath according to claim 1, characterized in that: The sheath tube is coaxially arranged with the operation tube.

5. The negative pressure suction sheath according to claim 1, characterized in that: An extension portion is provided at one end of the interface, and the interface is fixed to the operating tube via the extension portion.

6. The negative pressure suction sheath according to claim 5, characterized in that: The outer wall of the extension part is provided with an external thread, the inner wall of the operation tube is provided with an internal thread for matching with the external thread, and the extension part is inserted into the operation tube and connected by threads.

7. The negative pressure suction sheath according to claim 5, characterized in that: The inner diameter of the extension portion is greater than the inner diameter of the interface, so that a boss is formed at the connection between the extension portion and the interface.

8. The negative pressure suction sheath according to claim 7, characterized in that: One end of the sheath tube is arranged in the interface, and the end of the sheath tube is flush with the boss.

9. The negative pressure suction sheath according to claim 1, characterized in that: The operating tube is provided with a fixing groove.

10. The negative pressure suction sheath according to claim 1, characterized in that: The sheath tube is a bendable sheath tube.

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