CN211050658U

CN211050658U - Guide wire guiding balloon catheter for chemical ablation of blood vessels

Info

Publication number: CN211050658U
Application number: CN201921865612.1U
Authority: CN
Inventors: 王怀杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-21
Anticipated expiration: 2029-10-31

Abstract

The utility model discloses a guide wire guide balloon catheter for chemical ablation of blood vessels, which comprises a catheter and a balloon arranged axially along the outer wall of the catheter, wherein the inner cavity of the catheter is divided into a guide wire guide channel, a balloon filling channel and a drug delivery channel which are mutually independent along the radial direction; the connector is provided with a first interface, a second interface and a third interface which are respectively communicated with the guide wire guide channel, the balloon filling channel and the drug delivery channel; a plurality of drug delivery micro-tubes are uniformly and densely distributed in the saccule, one end of each drug delivery micro-tube is communicated with the drug delivery channel in the catheter, and the other end of each drug delivery micro-tube is connected with a micropore arranged on the outer side wall of the saccule; after the saccule is expanded, the medicine is delivered to the surface of the saccule to be contacted with the target vascular endothelium through the medicine delivery channel, so that the target vascular wall is accurately damaged; in the case of treating the same target blood vessel, it is possible to greatly reduce normal blood components and reduce the amount of the drug used, compared to conventional chemical destruction or thermal ablation.

Description

Guide wire guiding balloon catheter for chemical ablation of blood vessels

Technical Field

The utility model relates to a medical equipment, concretely relates to blood vessel chemistry is ablated and is used seal wire guide sacculus pipe.

Background

The existing interventional catheters are divided into two types according to purposes: vessel recanalization and blood flow blockage. The revascularization catheters are used for dilating stenotic vessels by mechanical dilation or micro-cutting, wherein a drug-coated stent or balloon can release drugs after dilation to prevent vascular restenosis. The thrombolysis catheter also belongs to a blood vessel recanalization catheter, and plays a role in recanalization by introducing thrombolysis medicines. The blood flow blocking catheter is an interventional catheter for blocking blood flow by means of balloon expansion and adherence.

The common interventional catheter is a balloon catheter, the basic structure of the common interventional catheter is a double-cavity structure, a central channel is a guide wire guide channel, the other channel at the tail part is a balloon filling channel which is communicated with a balloon, balloon expansion is realized by injecting gas or liquid, and the two cavities are isolated from each other. Balloons are classified as non-compliant, semi-compliant, and super-compliant.

The current various balloon catheters are designed for the purpose of recanalization of blood vessels or blocking of blood flow, and the application of chemical ablation by balloon administration is not considered. In certain diseases, blood vessels need to be destroyed for therapeutic purposes, such as severe greater saphenous vein varicose which requires removal or destruction of the greater saphenous vein, and KT syndrome which requires removal or destruction of the peripheral veins. The current primary methods are surgical resection, chemical disruption, or physical thermal ablation. The corresponding existing catheter approach for damaging blood vessels is divided into thermal ablation and drug injection through a catheter to damage the blood vessel walls, which are both inaccurate, and a large amount of normal blood is also damaged while the blood vessel walls are thermally or chemically damaged, so that medical potential hazards exist. In these diseases, only the vessel wall needs to be destroyed for therapeutic purposes.

Currently, no chemical ablation catheter is available to achieve precise destruction, such as precise anhydrous ethanol ablation of the vessel wall by a balloon catheter.

SUMMERY OF THE UTILITY MODEL

For overcoming the deficiencies of the prior art, the utility model aims to provide a blood vessel chemistry that realizes accurate vascular wall chemistry destruction melts and guides sacculus pipe with seal wire, will reduce the medicine quantity to the destructive action minimizing of normal blood.

In order to achieve the above object, the utility model adopts the following technical scheme:

a guide wire guiding balloon catheter for chemical ablation of blood vessels comprises a catheter and a balloon which is axially arranged along the outer wall of the catheter, wherein the front end of the catheter is a guide wire traction head, and the rear end of the catheter is connected with a connector; the inner cavity of the catheter is divided into a guide wire guide channel, a balloon filling channel and a drug delivery channel which are independent from each other along the radial direction; the connector is provided with a first interface, a second interface and a third interface which are respectively communicated with the guide wire guide channel, the balloon filling channel and the drug delivery channel; a plurality of drug delivery micro-tubes are uniformly and densely distributed in the saccule, one end of each drug delivery micro-tube is communicated with the drug delivery channel in the catheter, and the other end of each drug delivery micro-tube is connected with a micropore arranged on the outer side wall of the saccule; the balloon filling channel is communicated with the balloon internal cavity.

Furthermore, the plurality of drug delivery micro-tubes are arranged along the radial direction of the saccule, and the drug delivery micro-tubes are distributed at equal intervals along the axial direction of the catheter without crossing each other.

Furthermore, a plurality of drug delivery micro-tubes are arranged along the approximate axial direction of the catheter, and all the drug delivery micro-tubes are distributed in an equidistant and crossed manner.

Furthermore, the outer side of the catheter is provided with developing marks, and the two developing marks are positioned inside the saccule and close to the end part of the saccule.

Furthermore, the sacculus is the double sacculus structure that sets up along the pipe axial, and two sacculus mutual independence.

Further, the diameter of the conduit is 5Fr-10 Fr.

Further, the diameter of the saccule is 0.5cm-3.0cm, and the length of the saccule is 3cm-10 cm.

The utility model discloses following beneficial effect has:

the utility model discloses a guide wire guide balloon catheter for chemical ablation of blood vessels, which divides the inner cavity of the catheter into a guide wire guide channel, a balloon filling channel and a drug delivery channel which are mutually independent along the radial direction; one channel is used for guiding a guide wire, the other channel is used for filling a saccule, the third channel is communicated with a drug delivery micro-tube, the other end of the drug delivery micro-tube is connected with a micropore formed in the outer side wall of the saccule, and after the saccule is expanded, drugs are delivered to the surface of the saccule through the drug delivery channel to be contacted with the endothelium of a target blood vessel, so that the wall of the target blood vessel is accurately damaged; in the case of treating the same target blood vessel, it is possible to greatly reduce normal blood components and reduce the amount of the drug used, compared to conventional chemical destruction or thermal ablation.

When the sacculus is filled and is expanded back and the laminating of vascular wall, squeeze away blood, blood is few or basically not have blood between sacculus surface and the vascular wall, forms local high concentration environment after the medicine reaches the sacculus surface, and high concentration medicine is direct to contact and reach the destructive action with the vascular intima, will reduce the medicine quantity to the destructive action minimizing of normal blood simultaneously.

The connector sets up three independent interface respectively, and the pipe divides into three-dimensional branch form and leads to the sacculus surface, and each passageway does not influence each other, improves transport efficiency.

Drawings

FIG. 1 is the overall structure diagram of the present invention

FIG. 2 is a schematic cross-sectional view of a catheter

FIG. 3 is a schematic view of a balloon structure

FIG. 4 is another schematic view of the balloon

FIG. 5 is a schematic view of the micropores of the outer layer of the balloon structure

In the figure: 1-catheter, 2-balloon, 3-connector, 4-first interface, 5-second interface, 6-third interface, 7-developing mark, 8-drug delivery micro-tube, 9-micropore, 10-micropore recess, 11-guide wire guide channel, 12-balloon filling channel and 13-drug delivery channel.

Detailed Description

The present invention will be described in further detail with reference to the following specific examples, which should not be construed as limiting the invention.

As shown in figure 1, the utility model discloses a blood vessel chemistry is seal wire guide sacculus pipe for ablation, including pipe 1 and the sacculus 2 that sets up along the pipe outer wall axial, the sacculus cladding is the enclosed construction in the outside of pipe 1, and the sacculus can expand the inflation after letting in air or liquid, struts the narrow position of blood vessel, pipe diameter 5Fr-10Fr, sacculus diameter 0.5cm-3.0cm, and length is 3cm-10cm, and the sacculus can select to adopt non-compliance, semi-compliance, compliance and super compliance material to make as required.

As shown in fig. 2, the front end of the catheter 1 is a guide wire traction head part, the end part is small and gradually increases to the diameter of the rear end, the rear end of the catheter is connected with a connector 3, and the inner cavity of the catheter 1 is divided into a guide wire guide channel 11, a balloon filling channel 12 and a drug delivery channel 13 which are mutually independent along the radial direction; the connector 3 is provided with a first interface 4, a second interface 5 and a third interface 6 which are respectively communicated with the guide wire guide channel 11, the balloon filling channel 12 and the administration channel 13; different materials are fed into the three channels through the structures, the second connector 5 is communicated with the guide wire guide channel 11 and keeps the same direction with the axial position of the catheter 1, the guide wire is prevented from being bent, the guide wire guide channel 11 is used for the guide wire to pass through, the balloon filling channel 12 is communicated with the inner cavity of the balloon 2, and after the balloon is fed into a disease focus position, air or liquid is filled into the balloon through the balloon filling channel 12 to inflate and expand the balloon.

As shown in fig. 3 and 4, a plurality of drug delivery micro-tubes 8 are uniformly and densely distributed in the saccule 2, one end of each drug delivery micro-tube 8 is communicated with a drug delivery channel 13 in the catheter 1, and the other end is connected with a micropore 9 arranged on the outer side wall of the saccule 2; the plurality of drug delivery micro-tubes 8 are uniformly distributed around the periphery of the catheter 1, the micropores 9 are uniformly and densely distributed on the outer side wall of the saccule 2, and after the saccule is expanded, the drug delivery micro-tubes 8 are relaxed and opened to deliver the drugs to the surface of the saccule.

As shown in figure 5, at the same time, at the positions of the micropores 9 distributed on the outer wall of the balloon 2, due to the tension of the drug delivery micro-tube 8, micropore dents 10 can appear, the dents just form a space for containing the drug, and the drug delivered to the surface of the balloon through the drug delivery micro-tube 8 stays in the micropore dents, so that the drug supply amount is ensured.

As shown in fig. 3, the plurality of drug delivery micro-tubes 8 are arranged along the radial direction of the balloon, and the drug delivery micro-tubes 8 are distributed at equal intervals along the axial direction of the catheter 1 and are not crossed with each other, the length of the drug delivery micro-tubes 8 is short, the drug delivery micro-tubes 8 are easily stretched and opened after the balloon is expanded, and the drug can directly reach the surface of the balloon.

As shown in fig. 4, as another embodiment of the utility model, a plurality of drug delivery microtubules 8 are arranged along the approximate axial direction of the catheter 1, and the drug delivery microtubules 8 are distributed alternately at equal intervals, the drug delivery microtubules 8 are arranged along the axial direction of the balloon, after the use, the balloon is easy to shrink and recover, and is convenient to take out.

As shown in fig. 3 and 4, the catheter is provided with two developing marks 7 on the outer side, the two developing marks 7 are positioned inside the balloon 2 and close to the end part of the balloon 2, and the balloon can conveniently track the position after entering the blood vessel. The sacculus 2 can also be a double-sacculus structure which is arranged along the axial direction of the catheter 1, and the two sacculus are mutually independent and respectively deliver medicines to the position of the vascular lesion.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.

Claims

1. A guide wire guide balloon catheter for vascular chemical ablation is characterized in that: comprises a catheter (1) and a balloon (2) axially arranged along the outer wall of the catheter, wherein the front end of the catheter (1) is a guide wire traction head, and the rear end of the catheter is connected with a connector (3); the inner cavity of the catheter (1) is divided into a guide wire guide channel (11), a balloon filling channel (12) and a drug delivery channel (13) which are independent from each other along the radial direction; the connector (3) is provided with a first interface (4), a second interface (5) and a third interface (6) which are respectively communicated with the guide wire guide channel (11), the balloon filling channel (12) and the drug administration channel (13); a plurality of drug delivery micro-tubes (8) are uniformly and densely distributed in the saccule (2), one end of each drug delivery micro-tube (8) is communicated with the drug delivery channel (13) in the catheter (1), and the other end of each drug delivery micro-tube is connected with a micropore (9) arranged on the outer side wall of the saccule (2); the balloon filling channel (12) is communicated with the inner cavity of the balloon (2).

2. The guidewire-guided balloon catheter for vascular chemical ablation according to claim 1, wherein: the plurality of drug delivery micro-tubes (8) are arranged along the radial direction of the saccule, and the drug delivery micro-tubes (8) are distributed at equal intervals along the axial direction of the catheter (1) and do not intersect with each other.

3. The guidewire-guided balloon catheter for vascular chemical ablation according to claim 1, wherein: the plurality of drug delivery micro-tubes (8) are arranged along the approximate axial direction of the catheter (1), and the drug delivery micro-tubes (8) are distributed in a crossing way at equal intervals.

4. A guidewire-guided balloon catheter for vascular chemical ablation according to claim 2 or 3, wherein: developing marks (7) are arranged on the outer side of the catheter, and the two developing marks (7) are positioned inside the saccule (2) and close to the end part of the saccule (2).

5. The guidewire-guided balloon catheter for vascular chemical ablation according to claim 4, wherein: the sacculus (2) is a double-sacculus structure which is arranged along the axial direction of the catheter (1), and the two sacculus are mutually independent.

6. The guidewire-guided balloon catheter for vascular chemical ablation according to claim 5, wherein: the diameter of the catheter (1) is 5Fr-10 Fr.

7. The guidewire-guided balloon catheter for vascular chemical ablation according to claim 5, wherein: the diameter of the saccule (2) is 0.5cm-3.0cm, and the length is 3cm-10 cm.