CN210250836U

CN210250836U - Anti-reflux catheter

Info

Publication number: CN210250836U
Application number: CN201920479510.XU
Authority: CN
Inventors: 陈尚雄; 郝迎学
Original assignee: First Affiliated Hospital of PLA Military Medical University
Current assignee: Nanfang Hospital; First Affiliated Hospital of PLA Military Medical University
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2020-04-07
Anticipated expiration: 2029-04-10

Abstract

The utility model discloses an anti-regurgitation catheter, including the body of pipe, the body includes inlet and liquid outlet, is equipped with anti-regurgitation valve on the one end of body that is close to the liquid outlet, and anti-regurgitation valve sets up along body circumference, and the one side and the body fixed connection of anti-regurgitation valve near the body are equipped with outer sheath pipe on the body, and outer sheath pipe box establishes on the body, and the one end of outer sheath pipe that is close to the liquid outlet is the head end, and the head end of outer sheath pipe is the toper and draws in to the body, and the head end of outer sheath pipe can cover anti-regurgitation valve cage; the outer wall of the tube body is provided with a sliding groove, one end of the outer sheath tube close to the liquid inlet of the tube body is a tail end, and the tail end of the outer sheath tube is folded towards the tube body and is in sliding connection with the sliding groove. The anti-reflux catheter can achieve the double effects of injecting medicines and preventing blood from flowing backwards, is easy to use, and brings great convenience to patients and medical work.

Description

Anti-reflux catheter

Technical Field

The utility model relates to the field of medical equipment, concretely relates to anti palirrhea pipe.

Background

Embolization, also known as embolization therapy (embolization), is the controlled injection of an embolization material into the blood supply vessel of a diseased organ via an arterial or intravenous catheter to occlude the vessel and interrupt the blood supply in order to control bleeding, treat tumors and vascular lesions and eliminate the function of the diseased organ. Embolization is an important technique in interventional therapy, and is one of three major techniques in interventional radiology, and is a major part of daily work.

When tumor blood vessels are perfused for chemotherapy or embolized blood vessels at present, a catheter needs to be inserted into a target blood vessel, and then medicine or embolization materials are injected or released, but the medicine or embolization materials are usually reflowed to normal tissues, so that great troubles are caused to patients and medical work.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the utility model provides an anti palirrhea pipe is provided, can prevent that blood is palirrhea when injecting into medicine and release embolic material, avoids medicine or embolic material to flow backwards to in the normal tissue.

In order to achieve the above purpose, the present invention is realized by the following technical solution: a backflow-resistant catheter comprises a catheter body, wherein the catheter body comprises a liquid inlet and a liquid outlet, one end, close to the liquid outlet, of the catheter body is provided with a backflow-resistant valve, the backflow-resistant valve is arranged along the circumferential direction of the catheter body, one side, close to the catheter body, of the backflow-resistant valve is fixedly connected with the catheter body, an outer sheath is arranged on the catheter body and sleeved on the catheter body, one end, close to the liquid outlet, of the outer sheath is a head end, the head end of the outer sheath is tapered and is drawn towards the catheter body, and the head end of the outer sheath can cover the backflow-resistant valve;

the outer wall of the tube body is provided with a sliding groove, one end of the outer sheath tube, which is close to the liquid inlet of the tube body, is a tail end, and the tail end of the outer sheath tube is furled towards the tube body and is in sliding connection with the sliding groove.

The outer sheath pipe is sleeved on the pipe body, and the diameter of one end, close to the liquid inlet, of the outer sheath pipe is reduced to be in sliding connection with the sliding rail on the pipe body, so that the outer sheath pipe can slide on the pipe body along the axial direction. When the outer sheath pipe slides to the liquid outlet direction, can cover anti regurgitation valve in the outer sheath pipe, slide to the liquid inlet direction as the outer sheath pipe, because the inboard of anti regurgitation valve is fixed on the body, therefore the outer sheath pipe releases anti regurgitation valve. Therefore, when the catheter is inserted into the body cavity and blood backflow is required to be prevented, the outer sheath tube slides towards the liquid inlet direction to release the anti-backflow valve.

The anti-reflux catheter has the advantages that: the anti-regurgitation valve can block regurgitation of blood, prevents that blood from driving medicine or embolic material to regurgitate to normal tissue, realizes the dual effects of injection and anti-regurgitation, brings great convenience for patients and medical work, and has simple structure, strong practicability, easy use and popularization.

Furthermore, the end of the tube body close to the liquid outlet is provided with an anti-reflux hole, and the anti-reflux hole is spirally arranged along the center of the tube body.

When the input medicine passes through the tube body, the medicine can be output from the anti-reflux hole, and the spiral arrangement can prevent the medicine and blood from flowing backwards.

Further, the anti-backflow hole gradually becomes smaller towards the axial direction of the pipe body.

The aperture gradually decreases towards the direction outside the tube body, and the effect of preventing backflow can be improved.

Further, still be equipped with the check valve in the body, the check valve sets up the one end that is close to the inlet at the body.

The one-way valve is arranged to limit the medicine in the tube body from flowing back, so that the pollution of the liquid medicine which is not input is avoided, and the medicine pollution is prevented.

Further, the minimum internal diameter of the head end of the outer sheath tube is the same as the outer diameter of the tube body, the head end portion of the outer sheath tube has elasticity, and the minimum internal diameter of the head end can be increased.

Because the inner diameter of the tube head end of the outer sheath is the same as the outer diameter of the tube body, the catheter can be tightly attached to the tube body and inserted into a blood vessel along with the tube body when a catheter is inserted, the pain of a patient is relieved, the head end part has elasticity, the head end part can be opened when the anti-reflux valve is released, and the head end is tightly attached to the tube body again under the action of the elasticity after the valve is released and covered again.

Furthermore, the tail end of the outer sheath pipe is conical towards the liquid inlet, a sliding block is arranged on the inner wall of the tail end, and the outer sheath pipe is connected with the sliding groove in a sliding mode through the sliding block.

The tail end shape of the outer sheath pipe is similar to the head end shape, the outer sheath pipe is connected with the sliding groove of the pipe body in a sliding mode through the sliding block at the tail end, and the outer sheath pipe can slide on the pipe body in the axial direction.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic view of the anti-drainback hole of the present invention;

fig. 4 is a schematic structural view of the chute of the present invention;

reference numerals: 100-tube body, 110-anti-reflux valve, 120-liquid outlet, 130-liquid inlet, 140-anti-reflux hole, 150-chute, 160-one-way valve, 200-sheath tube, 210-head end, 220-tail end and 230-slide block.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced components or structures must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered as limiting the present invention.

Referring to fig. 1, 2, 3 and 4, the present invention provides a catheter for preventing regurgitation, which comprises a catheter body 100, the catheter body 100 has a liquid inlet 130 and a liquid outlet 120, an outer sheath 200 is disposed on the catheter body 100, the outer sheath 200 is sleeved on the catheter body 100 and slidably connected to the catheter body 100, an anti-regurgitation valve 110 is further disposed on one end of the catheter body 100 close to the liquid outlet 120, the outer sheath 200 can cover the anti-regurgitation valve 110, after the catheter body 100 is inserted into a blood vessel, the outer sheath 200 slides along the catheter body 100 to release the anti-regurgitation valve 110, thereby preventing regurgitation of blood.

The anti-regurgitation valve 110 is arranged at one end of the tube body 100 close to the liquid outlet 120, the anti-regurgitation valve 110 is arranged along the circumferential direction of the tube body 100, one side close to the tube body 100 is fixedly arranged with the tube body 100, and the outer sheath 200 can cover the anti-regurgitation valve 110.

The end of the sheath 200 close to the liquid outlet 120 is a head end 210, the head end 210 of the sheath 200 is tapered toward the liquid outlet 120, the end of the head end 210 has the smallest inner diameter, which is the same as the outer diameter of the tube 100, so that the end of the head end 210 is closely attached to the tube 100, and when the tube 100 is inserted into a blood vessel, the sheath 200 can be inserted into the blood vessel together with the tube 100.

One end close to the loading port 130 is a tail end 220, the tail end 220 is tapered towards the loading port 130, the outer wall of the tube body 100 is provided with a chute 150, the chute 150 is arranged along the axial direction of the tube body 100, the end of the tail end 220 is provided with a slider 230 matched with the chute 150, so that the tail end 220 can be slidably connected with the tube body 100, and the sheath tube 200 can slide along the axial direction of the tube body 100.

The bend of the head end 210 has elasticity, and when the outer sheath 200 is slid to the right, the anti-regurgitation valve 110 can prop open the head end 210, so that the head end 210 is expanded outwards, and the minimum inner diameter is enlarged, thereby releasing the anti-regurgitation valve 110 from the outer sheath 200. When the sheath 200 is slid to the left, the anti-regurgitation valve 110 can also spread the head ends 210 apart, spreading the head ends 210 outward, thereby covering the anti-regurgitation valve 110 in the sheath 200.

The one-way valve 160 is disposed on a side of the tube 100 close to the inlet 130, and the one-way valve 160 prevents the liquid medicine from flowing back after passing through the tube 100, thereby preventing contamination of the liquid medicine that has not been input.

The pipe body 100 is further provided with a backflow resisting hole 140 at one end close to the liquid outlet 120, the backflow resisting hole 140 is arranged along the circumferential direction of the pipe body 100 and is spiral along the center of the pipe body 100, the hole diameter of the backflow resisting hole 140 gradually decreases towards the direction away from the axial direction of the pipe body 100, the medicine can flow out of the backflow resisting hole 140, and the backflow resisting hole 140 can prevent the medicine from flowing back into the pipe body 100.

The working principle of the anti-reflux catheter is as follows: when the catheter is not inserted into the blood vessel, the outer sheath 200 is slid to the left, and the anti-reflux valve 110 is housed in the outer sheath 200. After the catheter is inserted into the blood vessel, the head end 210 of the outer sheath 200 is inserted into the blood vessel along with the catheter, the liquid medicine is conveyed into the blood vessel through the tube body 100 and the anti-reflux holes 140 on the tube body 100, if blood reflux in the blood vessel needs to be prevented, the outer sheath 200 slides to the right, and as the anti-reflux valve 110 is fixedly arranged on the tube body 100, the head end 210 is propped open by the anti-reflux valve 110, so that the outer sheath 200 continues to slide to the right, and after the anti-reflux valve 110 is released, the head end 210 returns to the state of being tightly attached to the tube body 100 under the action of elasticity. The anti-regurgitation valve 110 blocks the regurgitation of blood in the blood vessel and prevents the regurgitation of drugs or embolic material into the normal tissue.

The anti-reflux catheter can prevent blood from refluxing when injecting medicines and releasing embolic materials, avoids the reflux of the medicines or the embolic materials to normal tissues, realizes the dual effects of injection and anti-reflux, and has the advantages of simple structure, strong practicability, easy use and popularization.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A backflow-resistant catheter comprises a catheter body, wherein the catheter body comprises a liquid inlet and a liquid outlet, and is characterized in that one end, close to the liquid outlet, of the catheter body is provided with a backflow-resistant valve, the backflow-resistant valve is arranged along the circumferential direction of the catheter body, one side, close to the catheter body, of the backflow-resistant valve is fixedly connected with the catheter body, an outer sheath tube is arranged on the catheter body and sleeved on the catheter body, one end, close to the liquid outlet, of the outer sheath tube is a head end, the head end of the outer sheath tube is tapered and is folded towards the catheter body, and the head end of the outer sheath tube can cover the backflow-resistant valve;

2. The catheter for preventing reflux according to claim 1, wherein an anti-reflux hole is formed at one end of the catheter body near the liquid outlet, and the anti-reflux hole is spirally arranged along the center of the catheter body.

3. The catheter of claim 2, wherein the anti-reflux orifice has a diameter that decreases in a direction away from the axial direction of the catheter body.

4. The catheter for preventing reflux according to claim 1, wherein a one-way valve is further disposed in the tube body, and the one-way valve is disposed at an end of the tube body close to the liquid inlet.

5. The catheter of claim 1, wherein the head end of the sheath has a minimum inner diameter equal to the outer diameter of the catheter body, and the head end portion of the sheath has elasticity, and the minimum inner diameter of the head end can be increased.

6. The catheter for preventing reflux according to claim 1, wherein the tail end of the outer sheath is tapered toward the liquid inlet, a slider is disposed on an inner wall of the tail end, and the outer sheath is slidably connected to the chute through the slider.