WO2021035961A1

WO2021035961A1 - Balloon catheter sheath

Info

Publication number: WO2021035961A1
Application number: PCT/CN2019/116434
Authority: WO
Inventors: 崔东哲
Original assignee: 香港大学深圳医院
Priority date: 2019-08-28
Filing date: 2019-11-08
Publication date: 2021-03-04
Also published as: CN110464422A

Abstract

A balloon catheter sheath. The balloon catheter sheath comprises a common dual-lumen vascular catheter sheath. An occlusion balloon (301) is disposed at a head end of the catheter sheath. An inflation port of the balloon (301) is located at a sheath tail end (31). The balloon catheter sheath is a three-channel apparatus. A first channel (310) is a balloon inflation channel; a second channel (311) is a sheath catheter cleaning channel; and a third channel (312) is a delivery catheter channel. The balloon catheter sheath makes safe, convenient and low-cost deep vein thrombectomy become possible.

Description

Balloon catheter sheath

Technical field

The application relates to the field of medical equipment, in particular to a balloon catheter sheath.

Background technique

Deep vein thrombosis of the lower extremities is a common peripheral vascular disease. The obstruction of venous return of the lower extremities and the concurrent pulmonary embolism caused by deep vein thrombosis of the lower extremities are a major danger to the patient's labor and life safety. The existing treatment equipment for lower extremity venous thrombosis uses common catheter sheaths and inferior vena cava filters to perform venous thrombectomy, but this method has poor treatment safety, complex procedures, and high costs.

technical problem

The purpose of the present invention is to provide a balloon catheter sheath, which has the advantages of making the surgical treatment of deep vein thrombosis of lower limbs safer, simpler and lower in cost.

Technical solutions

The technical scheme adopted by the present invention is:

The present application provides a balloon catheter sheath. The balloon catheter sheath includes a sheath tube and an external interface of the balloon catheter sheath.

The outer wall of the sheath is provided with a balloon, and the outer interface of the balloon catheter sheath is provided with 3 channels. The 3 channels are the first channel, the second channel, and the third channel. One of the three channels is A channel communicates with the balloon, and the channel can inflate or deflate the balloon.

Optionally, the balloon is located at the port position of the sheath.

Optionally, the other two channels among the three channels are respectively a liquid flushing channel and a thrombus suction catheter channel.

Beneficial effect

The beneficial effect of the present invention is that the principle of the present application is to add a balloon and an inflation and deflation channel corresponding to the balloon in the ordinary catheter sheath, so that the catheter in the balloon catheter sheath passes through the deep vein of the contralateral lower extremity ( When the iliac vein extends into the deep vein (iliac vein) of the affected side, the balloon is in a deflated state and will not affect the extension of the balloon catheter sheath into the blood vessel. When it extends into the iliac vein opening of the affected lower extremity, the balloon passes through The channel is inflated, so that after the balloon is inflated, the deep venous vessels of the affected leg will be temporarily blocked. At this time, the other two channels are used to flush the fluid and the other to suck the thrombus. After the balloon is inflated, the deep venous vessels of the affected leg will be temporarily sealed. Therefore, the deep venous thrombosis of the affected side will not bypass the balloon catheter sheath and enter the inferior vena cava, and will not cause the serious consequences of secondary pulmonary embolism, so that the deep venous thrombosis of the affected leg can be safely aspirated. After the treatment is completed, the balloon is deflated, and the balloon is restored to its original size, so that it can be taken out along with the balloon catheter sheath. This kind of structure is simple and completely avoids thrombus shedding and secondary pulmonary embolism that may be caused in the process of thrombus aspiration. The structure does not retain any substance in the body, and improves the quality of life of the patient. Compared with the current traditional deep vein thrombosis, the inferior vena cava filter needs to be inserted before the operation and the inferior vena cava filter needs to be removed after the operation, this patented product simplifies the operation process and completely eliminates the possibility of thrombosis during the aspiration process Sex. After the inferior vena cava filter is installed, due to the large number of thrombosis and technical inability to remove the filter, 30-40% of the inferior vena cava filter cannot be removed and remains in the patient's body for life. It is necessary to take anticoagulant for the rest of the patient's life. Health risks and economic pressure.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. A person of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

Figure 1 is a schematic diagram of the structure of a human lower limb venous system.

Figure 2 is a schematic diagram of the structure of a common catheter sheath.

Fig. 3 is a schematic diagram of the structure of the balloon catheter sheath provided by the present invention.

Embodiments of the present invention

The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The terms "first", "second", "third" and "fourth" in the specification and claims of the application and the drawings are used to distinguish different objects, rather than describing a specific order . In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes unlisted steps or units, or optionally also includes Other steps or units inherent in these processes, methods, products or equipment.

Reference to "embodiments" herein means that a specific feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art clearly and implicitly understand that the embodiments described herein can be combined with other embodiments.

Refer to FIG. 1, which is a schematic diagram of the lower extremity veins of the human body. As shown in FIG. 1, the lower extremity veins of the human body have three main parts, the inferior vena cava 10, the left lower extremity deep vein 11, and the right lower extremity deep vein 12. Deep vein thrombosis of the lower extremity is a common disease. In most patients, thrombosis occurs in only one deep vein, such as the deep vein 11 of the left lower extremity or the deep vein 12 of the right lower extremity as shown in Figure 1. The existing treatment method for venous thrombosis of the lower extremities is to extend a catheter sheath from the femoral vein of the healthy lower extremity. As shown in Figure 2, the catheter sheath has two ports, a first port 21 and a second port 22. When the tip of the tube is inserted into the position of the iliac vein of the lower limb on the affected side (this position can be detected by the DSA device in the operation), the first port flushes liquid (usually normal saline) inward to keep the catheter sheath unobstructed. At this time, the second port The port 22 is inserted into the vein of the affected limb with a thrombus aspiration catheter, usually an Angiojet thrombus aspiration catheter to aspirate the thrombus, so that the deep vein thrombosis of the affected side is drawn out of the body through the Angiojet thrombus aspiration catheter, and then the venous thrombosis is treated. However, this method has a problem. In the process of aspirating thrombus, some thrombus will inevitably bypass the catheter sheath and reach the vena cava 10. Since the inferior vena cava of the human body is much thicker than the veins of the lower limbs, it is generally not formed in the inferior vena cava 10. Embolism, but after passing through the inferior vena cava 10, the thrombus will pass through the right atrium and right ventricle, and then enter the pulmonary artery, causing secondary embolism of the pulmonary artery, seriously affecting the body's health and even causing death.

In order to solve this problem, the medical community has provided a solution, that is, the inferior vena cava filter is inserted before the operation. The filter is a macroporous mesh structure. The filter is placed in the inferior vena cava before the operation. The vena cava filter filters part of the thrombus bypassing the catheter sheath to achieve the purpose of preventing pulmonary embolism. However, the existing vena cava filter has a hollow structure, which can only filter larger thrombus. Blood clots cannot be filtered. In addition, the vena cava filter placed in the body is a disposable product, and about 30%-40% of patients cannot remove the vena filter after surgery. If the filter cannot be removed, the inferior vena cava filter is more prone to thrombosis, and the patient needs to be treated with oral medication for life. In addition, the price of the vena cava filter is very expensive, and the price of a single vena cava filter is more than 10,000 yuan, which puts a lot of economic pressure on the patient.

Referring to Figure 3, Figure 3 provides a balloon catheter sheath, the balloon catheter sheath includes: a sheath 30, a balloon catheter sheath outer interface 31, the outer wall of the sheath 30 is provided with a balloon 301, the balloon catheter The sheath outer interface 31 is provided with three channels, the three channels are respectively the first channel 310, the second channel 311 and the third channel 312, wherein one channel of the three channels is connected to the balloon 301, and the one channel can The balloon 301 is inflated or deflated.

The present application provides a balloon catheter sheath. The balloon catheter sheath includes a common double-lumen vascular catheter sheath, a blocking balloon is arranged at the head end of the catheter sheath, and the balloon inflation port is located at the end of the sheath (external end). The balloon catheter sheath is a three-channel device, channel 1 is a balloon inflation channel; channel 2 is a sheath flushing channel; channel 3 is a delivery catheter channel. The technical solution provided by this application makes deep vein thrombus removal surgery possible in a safe, convenient, and low-cost manner.

The principle of this application is to add a balloon and an inflation and deflation channel corresponding to the balloon at the end of the ordinary catheter sheath, so that when the sheath of the balloon catheter sheath extends into the affected iliac vein, the balloon In order to deflate, it will not affect the extension of the balloon catheter sheath into the blood vessel. When it extends into the affected iliac vein, the balloon is inflated through the channel, so that the deep vein lumen of the lower extremity will be temporarily blocked after the balloon is inflated. At this time, one flushes the fluid through the other two channels, and the other is inserted into the Angiojet thrombus suction catheter to suck the thrombus. Because the balloon will temporarily block the veins of the lower extremities after the balloon is inflated, the thrombus will not bypass the balloon catheter sheath, and thus can be more effective. Good for aspiration of venous thrombosis of lower extremities and prevention of pulmonary embolism. After the thrombus is sucked, the balloon is deflated, and the balloon returns to its original size, so that it can be taken out along with the balloon catheter sheath. The structure is simple, and the venous thrombosis is cleaned very cleanly, and this structure does not retain any substance in the body, improves the health of the patient, and improves the treatment effect.

Optionally, the other two channels among the above-mentioned three channels are respectively a liquid flushing channel and a channel passing through a plug-suction catheter.

Optionally, the balloon 301 is located at the port position of the catheter 30, and the purpose of setting the port position of the catheter 30 is that the closer it is to the port, the closer the cleaned thrombus is to the thrombus suction channel, and the better the absorption of the thrombus.

The embodiments of the application are described in detail above, and specific examples are used in this article to illustrate the principles and implementation of the application. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the application; at the same time, for Those of ordinary skill in the art, based on the ideas of the application, will have changes in the specific implementation and the scope of application. In summary, the content of this specification should not be construed as limiting the application.

Claims

A balloon catheter sheath comprising: a sheath tube and an external interface of the balloon catheter sheath, characterized in that:

The outer wall of the head end of the sheath is provided with a balloon, and the outer interface of the balloon catheter sheath is provided with 3 channels. The 3 channels are the first channel, the second channel, and the third channel. One of the channels communicates with the balloon, and the channel can inflate or deflate the balloon.
The balloon catheter sheath of claim 1, wherein:

The balloon is located at the port position of the sheath.
The balloon catheter sheath of claim 1 or 2, wherein:

The other two channels among the three channels are respectively a liquid flushing channel and a thrombus suction catheter channel.