CN216908898U

CN216908898U - Multi-lumen microcatheter for drug delivery

Info

Publication number: CN216908898U
Application number: CN202122801633.0U
Authority: CN
Inventors: 曹刚毅; 贾登强; 顾海军; 李治威
Original assignee: Huanxin Medical Technology Suzhou Co ltd
Current assignee: Huanxin Medical Technology Suzhou Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-07-08
Anticipated expiration: 2031-11-16

Abstract

The utility model discloses a multi-cavity micro catheter for drug delivery, which comprises a catheter body and a luer connector arranged at the proximal end of the catheter body; the catheter body comprises a first tube body and a second tube body, a gap is formed between the first tube body and the second tube body, and the gap is communicated with the first input port of the Ruhr joint; the far end of the second tube body is provided with a group of liquid outlet holes, and a linear outer layer is wrapped on the outer wall of the second tube body and is positioned at the periphery of the liquid outlet holes; filling medium enters the gap from the first input port and props open the second tube body until the second tube body is attached to the inner wall of the blood vessel; the filling medium continues to enter the linear outer layer, which expands until its outer diameter is greater than the outer diameter of the second tubular body. The advantages of the utility model are embodied in that: the filling medium sequentially passes through the second pipe body and the linear outer layer, the second pipe body is attached to the inner wall of the blood vessel, the linear outer layer is stressed and expanded until the branch part of the blood vessel is sealed, the liquid medicine injected from the second input port is favorably and intensively delivered to the affected part, the liquid medicine is effectively prevented from being dispersed, and the treatment effect is improved.

Description

Multi-lumen microcatheter for drug delivery

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a multi-cavity type micro catheter for drug delivery.

Background

The interventional therapy is a minimally invasive intracavity surgical therapy which adopts high-tech equipment of a television monitor, carries out repairing, expanding and dredging work by forming a small hole at a certain part of a human body and then using a micro-catheter to go deep into blood vessels in the body of a patient, and has attracted attention as an effective treatment method for various vascular diseases. With the continuous development of interventional therapy, the improvement of the operation capability of doctors and the continuous challenge of serious complex lesions, as a medical appliance microcatheter in the interventional therapy process, the medical appliance microcatheter can reduce the complexity of interventional operation of intravascular lesions and improve the success rate, and simultaneously becomes an important instrument for interventional operation by reducing the risk of rupture of blood vessels during interventional therapy and reducing the risk of patients in the complex interventional therapy.

The prior catheter structure is disclosed in "a shock wave assisted drug perfusion balloon catheter and medical device" introduced in chinese patent CN 202110628898.7. The technical scheme in the technical scheme is as follows: the pipe comprises the interior outer tube of coaxial setting, is provided with the sacculus on the outer tube, forms infusion passageway between the two, and normal saline reaches the sacculus through this passageway to be full to the limit with the sacculus, its full process is shown as figure 1a, and this scheme exists following not enoughly: firstly, the balloon is non-compliant, so that the balloon is stopped after being filled to the limit, and the situation that the balloon cannot be tightly attached to the inner wall of the blood vessel is possibly caused; secondly, after the sacculus was full, its diameter was greater than the external diameter of outer tube, so when the sacculus hugs closely the blood vessel inner wall, but can produce the clearance between the outer wall of outer tube and the blood vessel inner wall, lead to not having stable contact between whole pipe and the blood vessel, probably can produce unnecessary removal or rock, and then make the medicine probably flow from between blood vessel inner wall and the sacculus, make the medicine can't fix a point and deliver to the affected part.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving the above-mentioned problems of the prior art and to providing a multi-lumen microcatheter for drug delivery.

The purpose of the utility model is realized by the following technical scheme:

the multi-cavity micro catheter for drug delivery comprises a catheter body and a luer connector arranged at the proximal end of the catheter body; the catheter body comprises a first catheter body and a second catheter body coated on the circumferential surface of the first catheter body, a gap is formed between the first catheter body and the second catheter body, and the gap is communicated with the first input port of the Ruhr joint; the far end of the second pipe body is provided with a group of liquid outlet holes, and a linear outer layer is wrapped on the outer wall of the second pipe body and is positioned on the periphery of the liquid outlet holes; filling medium enters the gap from the first input port and struts the second tube body until the second tube body is attached to the inner wall of the blood vessel; the inflation medium continues into the linear outer layer, which expands until its outer diameter is greater than the outer diameter of the second tubular body.

Preferably, the far end of the second tube body is fixed on the tube wall of the first tube body; and the two ends of the linear outer layer are fixedly connected with the pipe wall of the second pipe body.

Preferably, the luer connector further comprises a second inlet; the second input port is communicated with the pipeline of the first pipe body.

Preferably, the first tube has a drug passage and a suction passage formed therein, which are not communicated with each other.

Preferably, the luer connector further comprises a second inlet port and a third inlet port; the second input port is in communication with the drug channel; the third input port is in communication with the aspiration channel.

Preferably, the linear outer layer is a medical elastic membrane, and clings to the outer wall of the second tube body in an initial state, and the elastic modulus of the linear outer layer is greater than that of the second tube body.

Preferably, when the second tube body is not opened in the initial state, the liquid outlet hole is in a closed state.

The technical scheme of the utility model has the advantages that:

after the first input port is injected with the filling medium, the second pipe body is stressed and stretched, is attached to the inner wall of the blood vessel, and inputs the filling medium into the linear outer layer, and the linear outer layer is stressed and expanded until the linear outer layer is tightly attached to the inner wall of the blood vessel, so that the branch part of the blood vessel is sealed, the concentrated administration of the liquid medicine injected from the second input port is facilitated, the liquid medicine is effectively prevented from being dispersed, and the treatment effect is improved;

at least two first medicine channels and suction channels which are different from each other can be formed in the first tube body, and pus at an affected part can be sucked out through the suction channels before medicine injection, so that the absorption rate of a lesion part to medicines is improved;

the second pipe body is coated on the periphery of the first pipe body, so that the two pipe bodies cannot shake and are more stable;

the internal diameter of second body equals the external diameter of first body under the normality, and the internal diameter of first body is bigger compared with prior art, makes things convenient for doctor's operation more.

Drawings

FIG. 1 a: the non-compliant balloon filling procedure disclosed in the background;

FIG. 1 b: the filling process of the linear outer layer of the preferred embodiment of the present invention;

FIG. 2: a perspective view of a preferred first embodiment of the present invention;

FIG. 3: the preferred structure of the utility model is shown schematically;

FIG. 4: a perspective view of a preferred second embodiment of the present invention;

FIG. 5: a second embodiment of the utility model is preferred in partial cross-section.

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.

In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., 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, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

As shown in fig. 2 to 4, the present invention discloses a multi-lumen microcatheter for drug delivery, which comprises a catheter body 1 and a luer 2 disposed at the proximal end of the catheter body 1. The luer fitting 2 is prior art and will not be described in detail herein. As shown in fig. 2 and 3, the catheter body 1 includes a first tube 11 and a second tube 12 covering a circumferential surface of the first tube 11. The distal end of the second tube 12 is fixed to the wall of the first tube 11 by using an adhesive or a hot-melt process.

A gap 102 is formed between the first pipe 11 and the second pipe 12. And the distal end of the second body 12 is formed with a plurality of exit holes 120. A linear outer layer 13 is wrapped on the outer wall of the second tube body 12 and is positioned at the periphery of the liquid outlet hole 120; and two ends of the linear outer layer 13 are fixedly connected with the pipe wall of the second pipe body 12. The second tube 12 and the linear outer layer 13 are both made of an elastic material disclosed in the prior art, wherein the linear outer layer 13 is a medical elastic film; and the modulus of elasticity of the linear outer layer 13 is greater than that of the second tubular body 12. In the initial state, the liquid outlet 120 is in a closed state, and the linear outer layer 13 is tightly attached to the outer wall of the second tube 12.

The first embodiment: the luer fitting 2 includes a first inlet port 21 and a second inlet port 22. Said gap 102 communicates with the first inlet 21 of said luer 2; the second inlet 21 is in communication with the duct of the first tube 11. There is one and only one conduit within the first body 11, i.e. the diameter of this passage is equal to the inner diameter of the first body 11. Filling medium enters the gap 102 from the first input port 21 and stretches the second tube 12 until the second tube 12 is attached to the inner wall of the blood vessel; when the second tube 12 is expanded, the liquid outlet hole 120 is gradually enlarged, the filling medium continues to enter the linear outer layer 13 through the liquid outlet hole 120, the linear outer layer 13 is expanded under force until the outer diameter of the linear outer layer is larger than that of the second tube 12, and the non-affected part branch in the blood vessel is temporarily blocked; the liquid medicine enters the first tube 11 through the second input port 22, and the distal end of the first tube 11 is directed at the affected part for fixed-point administration. The advantage of this design is that the liquid medicine injected from the second input port 22 can be concentrated to the affected part, thereby effectively avoiding the liquid medicine from being dispersed and improving the treatment effect.

Second embodiment: the first tube 11 has a medicine passage 111 and a suction passage 112 formed therein, which are not communicated with each other. The luer fitting 2 includes a first inlet port 21, a second inlet port 22 and a third inlet port 23. Wherein the first inlet 21 communicates with said gap 102; the second input port 22 is in communication with the medication channel 111; the third input port 23 communicates with the suction passage 112. The distal ends of the drug passage 111 and the suction passage 112 are located at the affected part. Filling medium enters the gap 102 from the first input port 21 and stretches the second tube 12 until the outer wall of the second tube 12 is attached to the inner wall of the blood vessel; in the process, the liquid outlet holes 120 are gradually increased, the filling medium continues to enter the linear outer layer 13 through the liquid outlet holes 120, and the linear outer layer 13 is expanded until the outer diameter of the linear outer layer is larger than that of the second tube body 12, so that the non-affected part branches in the blood vessel can be temporarily blocked; starting the suction device, and drawing out pus or blockage from the affected part through the suction channel 112; the liquid medicine is injected from the second input port 22, and the liquid medicine enters the affected part through the liquid medicine channel, and the fixed-point delivery is realized, so that the liquid medicine is effectively prevented from being dispersed, and the treatment effect is improved. When no pus or blockage exists on the affected part, the suction channel 112 can also be used for injecting liquid medicine, and the design has the advantages that the two liquid medicines can be injected simultaneously, so that the injection speed is increased, the time consumed by the jewelry is shortened, and the working efficiency is further improved.

In addition, it is not excluded that the first tube 11 is provided with other channels besides the above channels, and the internal channels thereof can be adjusted and designed according to actual requirements, which is not described in detail herein. Likewise, the number of input ports of the luer fitting 2 is not limited herein.

The utility model has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the utility model.

Claims

1. The multi-cavity micro catheter for drug delivery comprises a catheter body (1) and a luer connector (2) arranged at the proximal end of the catheter body (1); the method is characterized in that: the catheter body (1) comprises a first tube body (11) and a second tube body (12) coated on the circumferential surface of the first tube body (11), a gap (102) is formed between the first tube body and the second tube body, and the gap (102) is communicated with a first input port (21) of the Ruhr connector (2); a group of liquid outlet holes (120) are formed at the far end of the second tube body (12), and a linear outer layer (13) is wrapped on the outer wall of the second tube body (12) and is positioned at the periphery of the liquid outlet holes (120); -the filling medium enters the interspace (102) from the first inlet opening (21) and spreads the second tube (12) until the second tube (12) is in abutment with the inner wall of the blood vessel; the filling medium continues into the outer linear layer (13), the outer linear layer (13) expanding until its outer diameter is greater than the outer diameter of the second tubular body (12).

2. The multi-lumen microcatheter for drug delivery according to claim 1, wherein: the far end of the second tube body (12) is fixed on the tube wall of the first tube body (11); and two ends of the linear outer layer (13) are fixedly connected with the pipe wall of the second pipe body (12).

3. A multi-lumen microcatheter for drug delivery according to claim 1, wherein: the luer fitting (2) further comprising a second inlet port (22); the second inlet (22) is in communication with the duct of the first body (11).

4. The multi-lumen microcatheter for drug delivery according to claim 1, wherein: the first tube body (11) is internally provided with a medicine channel (111) and a suction channel (112) which are not communicated with each other.

5. The multi-lumen microcatheter for drug delivery according to claim 4, wherein: the luer fitting (2) further comprising a second inlet port (22) and a third inlet port (23); the second input port (22) is in communication with the medication channel (111); the third inlet (23) communicates with the suction channel (112).

6. The multilumen microcatheter for drug delivery according to any of claims 1 to 5, wherein: the linear outer layer (13) is a medical elastic membrane and is tightly attached to the outer wall of the second tube body (12) in an initial state, and the elastic modulus of the linear outer layer (13) is larger than that of the second tube body (12).

7. The multi-lumen microcatheter for drug delivery according to claim 6, wherein: when the second tube body (12) is not propped open in the initial state, the liquid outlet hole (120) is in a closed state.