CN219250341U - Thrombolysis device with capturing basket - Google Patents

Abstract

The utility model discloses a thrombolysis device with a capturing basket, which comprises a thrombolysis catheter and a conveying catheter, wherein the thrombolysis catheter comprises a Y-shaped joint, a first pipe body and a second pipe body, the first pipe body is connected with the end part of the Y-shaped joint to form an integrated structure and sleeved at the proximal end of the second pipe body, the capturing basket is arranged at the distal end of the second pipe body, the second pipe body is a double-cavity pipe and comprises a first cavity and a second cavity, the first cavity is used for leading wires to pass through, the second cavity is used for pouring and thrombolysis, the capturing basket is communicated with the first cavity, a pouring section is arranged on the second pipe body, and the conveying catheter is sleeved outside the pouring section of the thrombolysis catheter. The thrombolytic device with the capturing basket provided by the utility model can realize efficient thrombolysis and thrombolysis. The head end of the thrombolysis catheter is connected with the catching basket, and the distal end of the thrombolysis cavity is blocked, so that the secondary blockage of blood vessels caused by falling and flowing of tiny thrombus to downstream capillaries can be prevented, and thrombus attached to the wall of the blood vessels can be removed and collected. The whole device is simple to operate, convenient to use and high in practicality.

Description

Thrombolysis device with capturing basket

Technical Field

The utility model relates to a medical device, in particular to a thrombolysis device with a capturing basket.

Background

Deep vein thrombosis (deep venous thrombosis, DVT) is a disease caused by abnormal clotting of blood in a deep vein. With the development of technology, mechanical thrombus removal (percutaneous mechanicalthrombectomy, PMT) devices have emerged in recent years as a group of devices for removing acute and subacute thrombus in blood vessels, which remove thrombus in blood vessels by dissolving, pulverizing, aspiration and the like, and restore blood circulation and valve function. PMT is a minimally invasive endoluminal thrombi removal device that can rapidly remove thrombi, restore blood flow, save valve function, and has been accepted by experts in clinical effect, becoming a hotspot in recent research.

The prior art comprises the following steps: 1) The aspiration catheter is advanced into the thromboembolism in order to remove it by aspiration (i.e., negative pressure). Although generally safe, only relatively soft thromboembolisms are effective. In addition, thrombus often has the condition of adhering to the vessel wall, it is difficult to remove the thrombus by aspiration alone, and the smaller aspiration catheter distal tip aspiration opening is less likely to locate and catch the adherent thrombus in large diameter vessels, which can result in the patient drawing no thrombus but only blood during negative pressure aspiration, resulting in excessive patient blood loss. 2) The thrombolysis catheter body is a medical hollow tube, the diameter of the head end of the catheter body is gradually reduced, the catheter body is approximately conical, the perfusion section is close to the head end, the length is generally 10-50cm, and a plurality of perfusion holes are distributed. However, one accessory is added to seal the guide wire, so that the structural design and the production difficulty of the process are increased, when the catheter is placed for thrombolysis, the front end is not provided with a seal design, the thrombolysis medicine is lost greatly, and the thrombolysis efficiency is low; in addition, the thrombus block fallen off by thrombolysis can be flushed along with the circulation of blood, so that the thrombus is dredged finally, but in the thrombolysis process, when the volume of the fallen thrombus block is larger, the thrombus block is easy to re-block the finer blood vessel at the far end, thereby causing the secondary blocking of the blood vessel and forming new thrombus.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides a thrombolysis device with a capturing basket by improving the existing thrombolysis catheter.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a take thrombolysis device of arresting basket, includes thrombolysis pipe, conveying pipe, thrombolysis pipe includes Y type joint, first body, second body, first body is connected and is formed integrated structure and cover at the proximal end of second body at Y type joint tip, and the distal end of second body sets up and arrests the basket, the second body is two chambeies pipe, including first chamber, second chamber, and first chamber is used for the seal wire to pass through, and the second chamber is used for pouring into, thrombolysis, arrests basket and first chamber intercommunication, sets up the section of pouring on the second body, conveying pipe cover is fit outside thrombolysis pipe section of pouring into.

Preferably, the conveying conduit is made of high polymer materials such as pebax and nylon containing barium sulfate or bismuth oxide, and comprises a connector and a tube body, wherein the connector is connected with the tube body, the distal end of the tube body is designed to be tapered and chamfered, the inner diameter of the tube body is larger than the outer diameter of the second tube body, and the conveying conduit is used for conveying the thrombolysis conduit to a target position and withdrawing the thrombolysis conduit from the body together at the later stage.

Preferably, the first pipe body is made of polymer materials such as polyolefin or polyurethane elastomer, is soft, plays a role in stress release, and is adhered to the Y-shaped joint through assembly.

Preferably, the second pipe body is made of high polymer materials such as pebax containing barium sulfate or bismuth oxide, nylon and the like.

Preferably, the second pipe body is provided with a plurality of pouring holes, and the pouring holes form a pouring section.

Preferably, the second pipe body is provided with a first indicator and a second indicator, a perfusion section is arranged between the first indicator and the second indicator, the length of the perfusion section is 2cm, 5cm, 10cm, 20cm or 30cm, and the like, and the indicator is made of development materials such as platinum iridium alloy, gold, tantalum rings, and the like.

Preferably, the proximal end of the tube body is provided with a marking ring for accurate positioning in operation.

Preferably, the capturing basket is woven by nickel titanium wires and then is subjected to heat treatment into an oblate body through a die, so that escaped fine thrombus can be captured, the thrombus is prevented from escaping to the far end, and the occurrence rate of surgical complications is reduced; can also scrape off the wall-attached thrombus and improve the thrombus extraction rate.

Preferably, the venous thrombolysis device further comprises continuous perfusion equipment, such as a micro pump, a pulse pump and the like, wherein the continuous perfusion equipment is communicated with the second cavity, thrombolytic drugs are continuously perfused through the second cavity until reaching the perfusion section, the thrombolytic drugs are perfused through the perfusion holes of the perfusion section to break up thrombus, the thrombolytic drugs are contacted with the thrombus, the remotely opened capturing basket allows blood and thrombolytic drugs to pass through, blood circulation is ensured, escaped tiny thrombus can be captured, and secondary embolism caused by the flowing of the thrombolytic drugs into a capillary vessel with a tiny far end is prevented.

In the utility model, the end of the instrument, which is close to the doctor, is taken as the proximal end, and the end of the instrument, which is far away from the doctor, is taken as the distal end.

The utility model has the beneficial effects that:

by adopting the technical scheme, the second cavity is designed for filling and thrombolysis, the remote end blocking of the thrombolysis cavity is realized, and the filling section of the thrombolysis catheter is designed, so that efficient thrombolysis and thrombolysis are realized. The head end of the thrombolysis catheter is connected with the catching basket, so that the secondary blockage of blood vessels caused by the falling-off flow of the tiny thrombus to the downstream capillary vessels can be prevented, and the thrombus attached to the wall of the blood vessels can be removed and collected. The whole device is simple to operate, convenient to use and high in practicality.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art and the advantageous effects of the present utility model, the drawings required in the embodiments or the description of the prior art will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other structures may be obtained according to the structures shown in the drawings without inventive effort to those skilled in the art.

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of an embodiment of the present utility model.

Fig. 3 is a front view of a thrombolytic catheter according to the present utility model.

Fig. 4 is a cross-sectional view of a thrombolytic catheter of the present utility model.

Fig. 5 is a longitudinal cross-sectional view of a delivery catheter of the present utility model.

Reference numerals illustrate: 1-thrombolysis catheter, 2-delivery catheter, 3-Y type joint, 4-first body, 5-wire lumen, 6-second body, 7-perfusion and thrombolysis lumen, 8-first indicator, 9-perfusion hole, 10-delivery catheter tube, 11-second indicator, 12-indicator ring, 13-capture basket, 14-delivery catheter joint.

Detailed Description

Specific examples of the utility model:

as shown in fig. 1-5, the thrombolytic device with capturing basket in this embodiment includes a thrombolytic catheter 1 and a conveying catheter 2, the thrombolytic catheter includes a Y-shaped joint 3, a first tube body 4 and a second tube body 6, the first tube body is connected at the end of the Y-shaped joint to form an integral structure and is sleeved at the proximal end of the second tube body, the capturing basket 13 is arranged at the distal end of the second tube body, the second tube body is a dual-lumen tube, including a wire lumen 5, a perfusion and thrombolytic lumen 7, the capturing basket is communicated with the wire lumen, a perfusion section is arranged on the second tube body, and the conveying catheter is sleeved outside the perfusion section of the thrombolytic catheter.

In some embodiments, the delivery catheter is made of nylon containing barium sulfate, and comprises a delivery catheter connector 14 and a delivery catheter tube 10, wherein the connector is connected with the tube, the distal end of the tube is designed to taper and chamfer, the inner diameter of the tube is larger than the outer diameter of the second tube, and the delivery catheter is used for delivering the thrombolytic catheter to a target position, and the thrombolytic catheter and the delivery catheter are withdrawn together.

In some embodiments, the second tube is made using pebax containing barium sulfate.

In some embodiments, the second tube body is provided with a plurality of pouring holes 9, which form pouring sections.

In some embodiments, the second tube body is provided with a first indicator 8 and a second indicator 11, a perfusion section is arranged between the first indicator and the second indicator, the length of the perfusion section is 2cm, 5cm, 10cm, 20cm or 30cm, and the like, and the indicator is made of platinum-iridium alloy.

In some embodiments, a marker ring 12 is provided at the proximal and distal ends of the shaft for intraoperative precision positioning.

In some embodiments, the capturing basket is an oblate body which is made by sintering a die after being woven by nickel titanium wires, so that the escaped fine thrombus can be captured, the thrombus is prevented from escaping to the far end, and the occurrence rate of the operation complications is reduced; can also scrape off the wall-attached thrombus and improve the thrombus extraction rate.

In some embodiments, the continuous infusion apparatus uses a micropump to communicate the infusion with the thrombolytic chamber for infusion.

The working process of the utility model is as follows:

1) Performing a percutaneous puncture technique of the catheter sheath, and placing the catheter sheath.

2) And selecting a thrombolysis device with a proper perfusion section length, leading the guide wire under the guidance of X-rays, placing the delivery catheter into a target position along the guide wire, and withdrawing the guide wire after the delivery catheter passes through thrombus.

3) Under the guidance of X-ray, the distal end of the thrombolysis catheter passes through the proximal end of the guide wire, is inserted into the delivery catheter, and reaches the target position through the delivery catheter, and then the self-expanding capturing basket is expanded and released to be contacted with the wall of the blood vessel, so that the blood vessel is filled, and the guide wire is withdrawn. (the thrombolysis catheter is at least 30cm longer than the delivery catheter).

4) The delivery catheter is withdrawn, at least beyond the infusion segment of the thrombolytic catheter (beyond the first indicator mark 8 position).

5) The Y-shaped joint perfusion tube cavity is connected with perfusion equipment such as a micro pump and the like to inject thrombolytic drugs into the thrombolytic device for breaking the thrombus, the thrombolytic drugs are injected and sprayed through perfusion holes of the perfusion section to break the thrombus, the thrombolytic drugs are contacted with the thrombus, the remotely opened capturing basket allows blood and the thrombolytic drugs to pass through, the blood circulation is ensured, the escaped fine thrombus can be captured, and the secondary embolism caused by the escaped fine thrombus flowing into a capillary vessel at the far end is prevented.

6) And 5) continuously carrying out the step 5) for a certain time to crush thrombus, fully contacting with thrombolytic drugs and dissolving the thrombus.

7) When thrombolysis is completed, the continuous perfusion equipment is closed, the thrombolysis catheter is withdrawn into the conveying catheter, and the capturing basket is also contracted into the inner cavity of the conveying catheter; in the process, the catching basket contacts with the blood vessel wall, scrapes off the wall-attached thrombus, and improves the thrombus extraction rate.

8) The delivery catheter and thrombolytic catheter are withdrawn together under X-ray.

9) Routine care after interventional operation.

The utility model has the beneficial effects that:

the distal end of the thrombolysis cavity is directly plugged, so that the plugging guide wire of the accessory is effectively reduced, and the structural design and the production process are simplified; in addition, the distal end of the thrombolysis catheter is connected with the catching basket, so that the secondary blockage of blood vessels caused by falling off and flowing of fine thrombus to downstream capillaries can be prevented, and thrombus attached to the wall of the blood vessels can be removed and collected. Meanwhile, the suction pump is connected, the guide wire cavity of the suction pump can be used for sucking thrombus, the structure is simple, the operation is convenient, the conveying guide tube is simpler and easier, the conveying guide tube and the thrombolysis guide tube can be used separately, and even under the condition of smooth conveying, the conveying guide tube can be canceled.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (8)

1. The utility model provides a take thrombolysis device of arresting basket, its characterized in that, includes thrombolysis pipe, conveying pipe, thrombolysis pipe includes Y type joint, first body, second body, first body coupling forms integrated structure and overlaps the proximal end of establishing at the second body at Y type joint tip, and the distal end of second body sets up and catches the basket, the second body is two-chamber pipe, including first chamber, second chamber, and first chamber is used for the seal wire to pass through, and the second chamber is used for pouring, thrombolysis, catches basket and first chamber intercommunication, sets up the section of pouring on the second body, conveying pipe cover is fit outside thrombolysis pipe section of pouring.

2. The thrombolytic device with capturing basket according to claim 1, wherein the conveying conduit is made of polymer material blended with developing material, and comprises a joint and a tube body, the joint is connected with the tube body, the distal end of the tube body is designed to taper and chamfer, and the inner diameter of the tube body is larger than the outer diameter of the second tube body.

3. The thrombolytic device with capturing basket according to claim 2, wherein the first tube body is made of polymer materials such as polyolefin or polyurethane elastomer.

4. A thrombolytic device with a capturing basket according to claim 3 wherein the second tube body is provided with a plurality of pouring holes forming pouring sections.

5. The thrombolytic device with capturing basket according to any one of claims 3 or 4, wherein the second tube body is provided with a first indicator and a second indicator, and a filling section is arranged between the first indicator and the second indicator and made of developing material.

6. The thrombolytic device with capturing basket according to claim 5 wherein a marker ring is provided at the proximal and distal end of the tube body for accurate intraoperative positioning.

7. The thrombolytic device with capturing basket according to claim 6, wherein the capturing basket is woven by nickel titanium wires and is heat treated into a oblate body by a die.

8. The thrombolytic device with capture basket of claim 7 further comprising a continuous infusion apparatus, the continuous infusion apparatus communicating with the second chamber.

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