A guide sheath

Abstract

The utility model discloses a guide sheath relates to the field of medical devices, including sheath body, is seted up on the sheath body and has the installation mouth, sheath body one end fixed mounting has the butt joint, the edge of sheath body other end is connected with the expansion mechanism, the expansion mechanism includes the locating ring seat fixed mounting on the sheath body, the locating ring seat is fixedly installed with the inflation air bag, is connected with the gas pipeline on the inflation air bag, the gas pipeline end fixed mounting has the first cylinder, is equipped with the reset spring in the first cylinder, the first cylinder is movably installed with the first piston, the sheath body other end is connected with the lubricating mechanism, is fixedly installed with the first push rod on the first piston. The guide sheath, through the cooperation of expansion mechanism and lubricating mechanism, can lubricate the human body cavity, and the sheath body is convenient for passing through the narrow cavity.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically a guide sheath. Background Technology

[0002] A guide sheath is an auxiliary tool used to guide wires, catheters, or other medical devices into blood vessels or cavities. It is typically made of soft, flexible materials such as polyethylene, polyurethane, or silicone, which minimize tissue damage and improve the accuracy and safety of the procedure. Guide sheaths are ingeniously designed, with a tubular main body and a tapered socket at the end for easy insertion of guide wires or catheters. Some guide sheaths are also equipped with connectors for attaching other instruments, such as syringes or pressure monitoring devices. Furthermore, guide sheaths are usually marked with information such as size, length, and model to help healthcare professionals select and use them correctly. Guide sheaths have a wide range of applications, including cardiology, vascular surgery, urology, hepatobiliary surgery, and neurosurgery.

[0003] The human body contains several cavities that are often narrow and prone to adhesions. When medical sheaths need to pass through these narrow and sensitive cavities, they typically encounter significant resistance. If medical personnel attempt to force the sheath into these confined spaces during the procedure, this could potentially damage the body cavities and lead to a range of medical problems. Therefore, a guiding sheath is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a guiding sheath to solve the problem that the sheath encounters significant resistance when passing through narrow cavities in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a guide sheath, comprising a sheath body, an installation port on the sheath body, a connector fixedly installed at one end of the sheath body, an expansion mechanism connected to the edge of the other end of the sheath body, the expansion mechanism comprising a positioning ring fixedly installed on the sheath body, an expansion airbag fixedly installed on the positioning ring, an air supply pipe connected to the expansion airbag, a first cylinder fixedly installed at the end of the air supply pipe, a return spring provided in the first cylinder, a first piston movably installed in the first cylinder, and a lubrication mechanism connected to the other end of the sheath body.

[0006] Preferably, a first push rod is fixedly mounted on the first piston.

[0007] Preferably, the positioning ring seat has an installation groove, and the inflatable airbag is installed on the positioning ring seat through the installation groove.

[0008] Preferably, one end of the gas supply pipe is connected to the expansion airbag, and the other end of the gas supply pipe is connected to the first cylinder. One end of the return spring is connected to the bottom of the first cylinder, and the other end of the return spring is connected to the first piston. The expansion airbag is mounted on the sheath body through a positioning ring seat, and the gas supply pipe extends out of the sheath body through the installation port.

[0009] Preferably, the lubrication mechanism includes a forward conical head fixedly installed on the sheath body, the forward conical head having a conical surface and a nozzle on the conical surface, an infusion pipe connected to the forward conical head, a second cylinder connected to the infusion pipe, the second cylinder storing medical lubricant, a second piston movably installed on the second cylinder, and a second push rod fixedly installed on the second piston.

[0010] Preferably, the forward cone head is provided with a mating interface, and the forward cone head is mounted on the sheath body through the mating interface.

[0011] Preferably, one end of the infusion pipe is connected to the nozzle on the forward cone head, the other end of the infusion pipe is connected to the second cylinder, and the infusion pipe extends out of the sheath body through the installation port.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this application, after the first push rod is released, the return spring drives the first piston back to its initial position. Subsequently, the return action of the first piston draws gas from the expansion bladder into the first cylinder, causing the expansion bladder to contract. The forward-moving first piston can squeeze the gas in the first cylinder into the expansion bladder, causing the expansion bladder to inflate. The expansion of the expansion bladder widens the narrow and sticky cavities, thereby facilitating the spraying of medical lubricant.

[0014] 2. After the narrow and adhered cavity in this application is expanded, the second piston can be pushed forward by the second push rod. After the second piston is pushed forward, it will squeeze the medical lubricant in the second cylinder, so that the medical lubricant is sprayed out through the nozzle. The sprayed medical lubricant will adhere to the inner wall of the cavity, forming a lubricating effect, which makes it easier for the sheath body to pass through the narrow cavity and implant the sheath into the human cavity, and facilitates the entry of guide wires, catheters or other medical devices into human blood vessels or cavities. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the expansion mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the lubrication mechanism of this utility model.

[0019] The diagram is labeled as follows: 1. Connector; 2. Mounting port; 3. Sheath body; 4. Expansion mechanism; 401. Positioning ring seat; 402. Inflatable air bladder; 403. Gas delivery pipe; 404. First cylinder; 405. Return spring; 406. First piston; 407. First push rod; 5. Lubrication mechanism; 501. Forward cone; 502. Conical surface; 503. Infusion pipe; 504. Second cylinder; 505. Medical lubricant; 506. Second piston; 507. Second push rod; 508. Nozzle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1 and Figure 2 As shown, this utility model provides a technical solution for a guiding sheath, including a sheath body 3, an installation port 2 on the sheath body 3, a connector 1 fixedly installed at one end of the sheath body 3, an expansion mechanism 4 connected to the edge of the other end of the sheath body 3, and a lubrication mechanism 5 connected to the other end of the sheath body 3. Through the cooperation of the expansion mechanism 4 and the lubrication mechanism 5, the human body cavity can be lubricated, making it easier for the sheath body 3 to pass through narrow cavities.

[0022] like Figure 2 and Figure 3 As shown, the expansion mechanism 4 includes a positioning ring seat 401 fixedly installed on the sheath body 3, an expansion airbag 402 fixedly installed on the positioning ring seat 401, an air supply pipe 403 connected to the expansion airbag 402, a first cylinder 404 fixedly installed at the end of the air supply pipe 403, a return spring 405 provided inside the first cylinder 404, a first piston 406 movably installed inside the first cylinder 404, a first push rod 407 fixedly installed on the first piston 406, an installation groove provided on the positioning ring seat 401, the expansion airbag 402 is installed on the positioning ring seat 401 through the installation groove, one end of the air supply pipe 403 is connected to the expansion airbag 402, and the other end of the air supply pipe 403 is connected to the first cylinder 404.

[0023] Specifically, when the first piston 406 is pushed forward, it forces the gas in the first cylinder 404 into the inflatable bladder 402, causing the inflatable bladder 402 to inflate. The expansion of the inflatable bladder 402 widens the previously narrow and sticky cavity. Once the first push rod 407 is released, the return spring 405 activates, pushing the first piston 406 back to its initial position. After the first piston 406 returns to its original position, it draws the gas from the inflatable bladder 402 back into the first cylinder 404, causing the inflatable bladder 402 to contract.

[0024] like Figure 2 and Figure 4 As shown, the lubrication mechanism 5 includes a forward cone 501 fixedly installed on the sheath body 3. The forward cone 501 has a conical surface 502 and a nozzle 508. An infusion pipe 503 is connected to the forward cone 501. A second cylinder 504 is connected to the infusion pipe 503. The second cylinder 504 stores medical lubricant 505. A second piston 506 is movably installed on the second cylinder 504. A second push rod 507 is fixedly installed on the second piston 506. A mating interface is provided on the forward cone 501. The forward cone 501 is installed on the sheath body 3 through the mating interface. One end of the infusion pipe 503 is connected to the nozzle 508 on the forward cone 501, and the other end of the infusion pipe 503 is connected to the second cylinder 504.

[0025] Specifically, after the narrow and sticky cavity is expanded, the second piston 506 can be pushed forward by the second push rod 507. After the second piston 506 is pushed forward, it will squeeze the medical lubricant 505 in the second cylinder 504, so that the medical lubricant 505 is sprayed out through the nozzle 508. The sprayed medical lubricant 505 will adhere to the inner wall of the cavity, forming a lubricating effect. This effect can reduce the friction between the surfaces of the objects, so that the objects can move more smoothly on the contact surface, making it easier for the sheath body 3 to pass through the narrow cavity.

[0026] Working principle: During use, the sheath body 3 is inserted into the human body cavity. When encountering a narrow and adhered cavity, the first piston 406 can be pushed forward by the first push rod 407. After the first piston 406 is pushed forward, the gas in the first cylinder 404 is squeezed into the expansion bladder 402, causing the expansion bladder 402 to inflate. After the expansion bladder 402 expands the narrow and adhered cavity, the second piston 506 can be pushed forward by the second push rod 507. After the second piston 506 is pushed forward, it squeezes the medical lubricant 505 in the second cylinder 504, causing the medical lubricant 505 to be sprayed out through the nozzle 508. The lubricant 505 adheres to the inner wall of the cavity, creating a lubricating effect, which facilitates the passage of the sheath body 3 through the narrow cavity. After the medical lubricant 505 adheres to the inner wall of the cavity, the first push rod 407 can be released. After the first push rod 407 is released, the return spring 405 will push the first piston 406 to reset. After the first piston 406 resets, it will draw the gas in the inflatable balloon 402 into the first cylinder 404, causing the inflatable balloon 402 to contract. After the inflatable balloon 402 contracts, it can push the sheath body 3 forward, thereby inserting the sheath into the human cavity. This facilitates the entry of guide wires, catheters or other medical devices into human blood vessels or cavities, thereby reducing trauma and improving the accuracy and safety of the operation.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A guiding sheath, comprising a sheath body (3), wherein an installation port (2) is provided on the sheath body (3), and a connector (1) is fixedly installed at one end of the sheath body (3), characterized in that: An expansion mechanism (4) is connected to the edge of the other end of the sheath body (3). The expansion mechanism (4) includes a positioning ring seat (401) fixedly installed on the sheath body (3). An expansion airbag (402) is fixedly installed on the positioning ring seat (401). An air supply pipe (403) is connected to the expansion airbag (402). A first cylinder (404) is fixedly installed at the end of the air supply pipe (403). A return spring (405) is provided in the first cylinder (404). A first piston (406) is movably installed in the first cylinder (404). A lubrication mechanism (5) is connected to the other end of the sheath body (3).

2. The guiding sheath according to claim 1, characterized in that: A first push rod (407) is fixedly mounted on the first piston (406).

3. A guiding sheath according to claim 2, characterized in that: The positioning ring seat (401) is provided with an installation groove, and the inflatable airbag (402) is installed on the positioning ring seat (401) through the installation groove.

4. A guiding sheath according to claim 3, characterized in that: One end of the gas supply pipe (403) is connected to the inflatable airbag (402), and the other end of the gas supply pipe (403) is connected to the first cylinder (404). One end of the return spring (405) is connected to the bottom of the first cylinder (404), and the other end of the return spring (405) is connected to the first piston (406). The inflatable airbag (402) is installed on the sheath body (3) through the positioning ring seat (401). The gas supply pipe (403) extends out of the sheath body (3) through the mounting port (2).

5. A guiding sheath according to claim 4, characterized in that: The lubrication mechanism (5) includes a forward cone (501) fixedly installed on the sheath body (3), the forward cone (501) having a conical surface (502) and a nozzle (508) on the conical surface (502), an infusion pipe (503) connected to the forward cone (501), a second cylinder (504) connected to the infusion pipe (503), a medical lubricant (505) stored in the second cylinder (504), a second piston (506) movably installed on the second cylinder (504), and a second push rod (507) fixedly installed on the second piston (506).

6. A guiding sheath according to claim 5, characterized in that: The forward cone (501) is provided with a mating interface, and the forward cone (501) is installed on the sheath body (3) through the mating interface.

7. A guiding sheath according to claim 6, characterized in that: One end of the infusion pipe (503) is connected to the nozzle (508) on the forward cone (501), and the other end of the infusion pipe (503) is connected to the second cylinder (504). The infusion pipe (503) extends out of the sheath body (3) through the mounting port (2).

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