CN212307961U

CN212307961U - Guide sheath

Info

Publication number: CN212307961U
Application number: CN202020631740.6U
Authority: CN
Inventors: 刘暴; 来志超; 李康
Original assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Current assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-01-08
Anticipated expiration: 2030-04-24

Abstract

The utility model discloses a guide sheath, which comprises a balloon structure and a sheath tube structure, wherein the sheath tube structure is tubular, the balloon structure is wrapped on the periphery of the sheath tube structure and is arranged close to the head end of the sheath tube structure, and a first channel of the sheath tube structure is communicated with the interior of the balloon structure; the balloon structure comprises a first balloon bag and a second balloon bag which are communicated with each other inside, the first balloon bag and the second balloon bag are arranged in parallel along the length direction of the sheath tube structure, the first balloon bag is arranged close to the end part of the head end of the sheath tube structure, and the second balloon bag is arranged far away from the end part of the head end of the sheath tube structure; during filling, the outer diameter of the first sachet is greater than the outer diameter of the second sachet; be equipped with liquid injection portion on the second bag, liquid injection portion with the second passageway intercommunication of sheath structure, when filling, the second bag is bloated and is passed through liquid injection portion injects liquid into the vascular wall. The utility model relates to a guide sheath can prevent that blood from breaking up the thrombus that drops, is washed the low limbs end by the blood flow and causes the health hidden danger.

Description

Guide sheath

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to guide sheath.

Background

Arterial occlusion of the lower extremities is a common arterial disease of vascular surgery, meaning that the blood vessels supplying the lower extremities become occluded, resulting in ischemia of the lower extremities. In the blood vessel anatomy of a human body, a common femoral artery is a downward continuation of an external iliac artery, is about 2-3 cm long, and is quickly divided into a superficial femoral artery and a deep femoral artery. The superficial femoral artery continues downward to supply blood to the lower limb for the artery of the lower limb of the knee. The current common surgical methods are: the common femoral artery is punctured anterogradely, the guide wire is sent into the superficial femoral artery by the puncture needle, the delivery sheath is placed under the guidance of the guide wire, and a passage which enters the blood vessel from the outside of the body is established. The plaque and thrombus blocking the blood vessel are removed by feeding the working guide wire through the delivery sheath, guiding the plaque rotary cutter and the thrombus suction catheter, and the method is a novel method for treating arterial occlusion of lower limbs.

In the process of rotary cutting or thrombus suction of an occluded blood vessel, the fallen thrombus or plaque is easily washed away by high-speed flowing blood, so that ischemia of a far-end limb, which is clinically called as a garbage corner, can aggravate the symptoms of a patient. Therefore, how to prevent the detached thrombus or plaque from being washed away by the blood flow to the distal end of the blood vessel becomes an important technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a guide sheath, can prevent that the thrombus or the plaque that drop from being washed to the blood vessel distal end by the blood flow.

In order to achieve the above object, the present invention provides a guiding sheath, which includes a balloon structure and a sheath structure, wherein the sheath structure is tubular, the balloon structure is wrapped around the sheath structure and disposed near the head end of the sheath structure, and a first channel of the sheath structure is communicated with the inside of the balloon structure;

the balloon structure comprises a first balloon bag and a second balloon bag which are communicated with each other inside, the first balloon bag and the second balloon bag are arranged in parallel along the length direction of the sheath tube structure, the first balloon bag is arranged close to the end part of the head end of the sheath tube structure, and the second balloon bag is arranged far away from the end part of the head end of the sheath tube structure; upon filling, the outer diameter of the first pod is greater than the outer diameter of the second pod;

be equipped with liquid injection portion on the second bag, liquid injection portion with the second passageway intercommunication of sheath structure, when filling, the second bag is bloated and is passed through liquid injection portion injects liquid into the vascular wall.

Preferably, the second pod comprises a first portion made of a first elastic modulus material and a second portion made of a second elastic modulus material, the first elastic modulus being greater than the second elastic modulus;

the first portion and the second portion are respectively located on two sides of a longitudinal section of the second bag, the liquid injection portion comprises at least one microneedle, the microneedle is arranged on the outer wall of the first portion, the microneedle is ejected out when the balloon structure expands, and the microneedle is completely recovered in the second bag when the balloon structure contracts.

Preferably, the liquid injection part includes a plurality of microneedles arranged in a matrix.

the second bag has more than two peaks, and the first part is positioned at a concave part between the two peaks; the liquid injection part comprises at least one microneedle, the microneedle is arranged on the outer wall of the first part, the microneedle is ejected out when the balloon structure is expanded, and the microneedle is completely recovered in the second bag when the balloon structure is contracted.

Preferably, the second sachet is polygonal in cross-section.

Preferably, the sheath structure includes a first tube and a second tube arranged side by side, the first tube has the first channel, the second tube has the second channel, and the first channel and the second channel are independent of each other.

Preferably, the balloon structure is configured to: when the balloon structure is fully inflated, the first bag can be abutted against the inner wall of a blood vessel of a human body, and the highest point of the liquid injection part on the second bag reaches the tunica media of the blood vessel.

Has the advantages that:

the utility model discloses a guide sheath, including sacculus structure and sheath tubular construction, the sacculus structure includes inside communicating first bag package and second bag package, through inciting somebody to action first bag package with the second bag package is followed the length direction of sheath tubular construction sets up side by side, and makes first bag package is close to the head end tip of sheath tubular construction sets up, the second bag package is kept away from the head end tip of sheath tubular construction sets up. Since the second capsule is provided with the liquid injection part, the liquid is injected into the blood vessel wall through the liquid injection part, so that the thrombus on the blood vessel wall is dissolved and falls off. And when the first bag is full, the outer diameter of the first bag is larger than that of the second bag, so that when the first bag is in operation, the first bag can block a blood vessel channel at one end of the blood vessel after being full, and then the first bag is sucked away through the thrombus suction device introduced from the sheath tube structure, so that blood is prevented from scattering dropped thrombus and being flushed to the tail end of the lower limb by blood flow, and health hidden troubles are caused.

Drawings

Fig. 1 is a schematic structural view of a state of an introducer sheath of the present invention;

FIG. 2 is a schematic view of another embodiment of an introducer sheath of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a schematic structural view of another embodiment of an introducer sheath according to the present invention;

fig. 5 is a schematic structural view of another embodiment of an introducer sheath according to the present invention;

fig. 6 is a schematic cross-sectional structure view of a second bag of the guiding sheath of the present invention, wherein 6A, 6B, 6C, and 6D are schematic structural views of the second bag when the second bag is a triangle, a quadrangle, a pentagon, and a hexagon.

The reference numbers are as follows:

balloon structure 100, first sachet 110, second sachet 120, first portion 121, second portion 122; a sheath structure 200, a first tube 210, a first channel 211, a second tube 220, and a second channel 221; a liquid injector 300 and microneedles 310.

Detailed Description

The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

As shown in fig. 1 to 6, a guide sheath prevents a detached thrombus or plaque from being washed by blood flow toward the distal end of a blood vessel.

To achieve the above object, the present invention provides an introducer sheath, as shown in fig. 1-3, including a balloon structure 100 and a sheath structure 200. Wherein, sheath structure 200 is the tubulose, sacculus structure 100 parcel is in sheath structure 200's periphery is close to sheath structure 200's head end sets up, sheath structure 200's first passageway 211 with sacculus structure 100's inside intercommunication.

The balloon structure 100 includes a first sachet 110 and a second sachet 120 that are interconnected. The first bag 110 and the second bag 120 are arranged in parallel along the length direction of the sheath structure 200, the first bag 110 is close to the head end of the sheath structure 200, and the second bag 120 is far away from the head end of the sheath structure 200. Upon filling, the outer diameter of the first pod 110 is larger than the outer diameter of the second pod 120. Fig. 1 is a schematic view of the balloon structure 100 during filling. Fig. 2 is a schematic structural view of the balloon structure 100 when deflated.

The second pouch 120 is provided with a liquid injection part 300. The liquid injection part 300 communicates with the second channel 221 of the sheath structure 200. When inflated, the second pouch 120 swells and injects liquid into the blood vessel wall through the liquid injection part 300.

In a preferred embodiment, as shown in fig. 3, 5, 6, the second pod 120 includes a first portion 121 made of a first elastic modulus material and a second portion 122 made of a second elastic modulus material, the first elastic modulus being greater than the second elastic modulus. The first portion 121 and the second portion 122 may be provided in two cases.

In one case, as shown in fig. 1 to 4, the first portion 121 and the second portion 122 are respectively located at two sides of a longitudinal section of the second pouch 120, that is, the first portion 121 is located at one side of a transverse axis of the entire structure of the second pouch 120, the liquid injection part 300 includes at least one microneedle 310, the microneedle 310 is disposed on an outer wall of the first portion 121, the microneedle 310 is ejected when the balloon structure 100 is expanded, and the microneedle 310 is completely recovered in the second pouch 120 when the balloon structure 100 is contracted.

In a preferred embodiment, the liquid injection part 300 may include a plurality of microneedles 310, and the plurality of microneedles 310 are arranged in a matrix. For example, the microneedles 310 may be in a 1 × 5 matrix as shown in fig. 4.

Alternatively, as shown in fig. 5 and 6, the second pod 120 may have more than two peaks, the first portion 121 being in a recess between the two peaks, and the remaining portions being the second portion 122. The liquid injection part 300 includes at least one microneedle 310, the microneedle 310 is disposed on an outer wall of the first portion 121, the microneedle 310 is ejected when the balloon structure 100 is expanded, and the microneedle 310 is completely retracted in the second pouch 120 when the balloon structure 100 is contracted. Wherein fig. 5 shows the case where the second bag has a plurality of peaks in the longitudinal direction, and fig. 6 shows the case where the second bag has a plurality of peaks in the cross-sectional direction.

In a preferred embodiment, as shown in fig. 6, the second sachet 120 can be polygonal in cross-section. For example, it may be one of a triangular star, a rectangular star, a pentagonal star, a hexagonal star, a starfish, or their respective variants. The second polygonal sachet 120 can form a recess between adjacent corners, and the first part 121 is positioned in the recess, so that a plurality of microneedles can be arranged in the circumferential direction, drug injection can be simultaneously carried out on a circle of a blood vessel wall, and the operation efficiency is improved. Of course, the two cases of fig. 5 and fig. 6 can also be combined to be applied, so that not only can a plurality of microneedles be adopted to simultaneously inject the medicine in the circumferential direction, but also a plurality of microneedles can be adopted to simultaneously inject the medicine in the longitudinal direction, and the operation efficiency is further improved.

As a rule of thumb, the first portion 121 of a first elastic modulus material may comprise 5% to 30% of the total surface area of the second balloon and the second portion 121 of a second elastic modulus material may comprise 70% to 95% of the total surface area of the balloon-like balloon. The difference between the elastic moduli of the first elastic modulus material and the second elastic modulus material can be set to 200 to 1600 MPa. Therefore, the balloon structure 100 can keep the outer surface of the common balloon in a uniform state after being expanded, and can recover to the initial concave state after being contracted, so that the microneedles 310 can be guaranteed to be penetrated into the inner wall of the blood vessel basically and vertically, and the microneedles 310 can be completely retracted after the drugs are injected.

Because the first portion 121 is made of the first elastic modulus material, when the second sachet 120 is initially pressurized to the same lower pressure, the second elastic modulus material is firstly expanded by the pressure to be in a protruding state, and the first portion 121 made of the first elastic modulus material is still in a contracted state; as the pressurizing pressure increases, the first portion 121 of the first elastic modulus material expands to a sub-expanded state, thereby extending the microneedles 310 to penetrate the inner wall of the blood vessel. After the microneedle 310 finishes injecting the drug, the second pouch 120 is depressurized, and as the pressure is reduced, the first elastic modulus material is helpful to completely restore to the original concave form due to the larger elastic modulus, so that the microneedle 310 is better completely retracted in the second pouch 120 to be deeply hidden, and the possibility that the microneedle 310 damages the inner wall of the blood vessel is sufficiently avoided.

In a preferred embodiment, as shown in fig. 1, 2, 4 and 5, the sheath structure 200 may include a first tube 210 and a second tube 220 arranged side by side. The first pipe 210 has the first passage 211, the second pipe 220 has the second passage 221, and the first passage 211 and the second passage 221 are independent of each other.

One end of the first tube 210 extends into the balloon structure 100 and is communicated with the balloon structure, and the other end of the first tube 210 is provided with a liquid injection port communicated with the outside, and the balloon structure is changed from a flat state to an inflated state by injecting liquid into the liquid injection port; one end of the second tube 220 is communicated with the microneedle 310, and the other end of the second tube 220 is provided with a drug injection port communicated with the outside, so that the drug can enter a blood vessel through the microneedle by injecting the drug into the drug injection port. The sheath structure 200 may further include a third tube, the third tube may pass through the balloon structure and extend out of the balloon structure, and the other end of the third tube may extend into the guiding device.

In a preferred embodiment, the balloon structure 200 may be configured to: when the balloon structure 200 is fully inflated, the first bag 110 can abut against the inner wall of the blood vessel of the human body, and the highest point of the liquid injection part 300 on the second bag 120 reaches the tunica media of the blood vessel.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A guide sheath comprises a balloon structure and a sheath tube structure, wherein the sheath tube structure is tubular, the balloon structure is wrapped on the periphery of the sheath tube structure and is arranged close to the head end of the sheath tube structure, and a first channel of the sheath tube structure is communicated with the interior of the balloon structure; the method is characterized in that:

2. The introducer sheath according to claim 1, wherein the second balloon includes a first portion made of a first elastic modulus material and a second portion made of a second elastic modulus material, the first elastic modulus being greater than the second elastic modulus;

3. The introducer sheath according to claim 2, wherein the liquid injection portion includes a plurality of microneedles arranged in a matrix.

4. The introducer sheath according to claim 1, wherein the second balloon includes a first portion made of a first elastic modulus material and a second portion made of a second elastic modulus material, the first elastic modulus being greater than the second elastic modulus;

5. The introducer sheath according to claim 4, wherein the second sachet has a polygonal cross-section.

6. The introducer sheath according to claim 1, wherein the sheath structure includes a first tube and a second tube arranged side by side, the first tube having the first channel, the second tube having the second channel, and the first channel and the second channel being independent of each other.

7. The introducer sheath of any one of claims 1-6, wherein the balloon structure is configured to: when the balloon structure is fully inflated, the first bag can be abutted against the inner wall of a blood vessel of a human body, and the highest point of the liquid injection part on the second bag reaches the tunica media of the blood vessel.