Quick release type suction catheter

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a quick release type suction catheter. The suction catheter comprises a main body part, a balloon is arranged on the main body part, and the balloon is arranged on the periphery of the main body part in a sleeving mode; the supporting catheter part is connected to the far end of the main body part, and the diameter of the supporting catheter part is smaller than that of the main body part; the expansion ring is connected to the far end of the supporting catheter part, and one side edge part of the supporting catheter part is connected with one side edge part of the expansion ring. According to the suction catheter, the supporting catheter part of the integrated connection structure is arranged at the far end of the suction catheter body part, so that the supporting catheter part with the small diameter has better passing ability, and the supporting catheter part can directly reach the focus position with the thin blood vessel conveniently; moreover, the supporting catheter part and the suction catheter main body part can be synchronously conveyed, and the suction catheter with the supporting catheter part only needs to be conveyed once, so that the operation steps are reduced, the operation difficulty is greatly reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a quick-release suction catheter. Background Art

[0002] In the treatment of acute ischemic stroke, when the cerebral blood vessels are blocked by blood clots, an aspiration catheter is often used in conjunction with a thrombectomy stent to remove the blood clots that cause the blood vessel blockage, so that the blood supply to the brain tissue can be restored as soon as possible, reducing the scope and severity of cerebral infarction.

[0003] Due to the small diameter of the blood vessels in the brain, the larger diameter suction catheter cannot directly reach the smaller part of the blood vessels. In the existing process of releasing the suction device, the larger diameter suction catheter is first delivered to the proximal end of the occlusion using a guide wire. Due to the large diameter of the suction catheter, the suction catheter is not able to pass through properly during the push to the distal end. At this time, a support catheter needs to be delivered inside the suction catheter, and then a smaller diameter support catheter needs to be delivered forward to assist in getting into position. Since the caliber of the support catheter is smaller than the suction catheter and the distal end has good flexibility, it can "run naked" into blood vessels with smaller calibers without a micro-guidewire micro-catheter. After the support catheter is in place, the micro-catheter is pushed to the distal end to perform the operation of putting the thrombectomy stent in place. In the above-mentioned existing surgical operation process, since the support catheter and the suction catheter need to be in place in two steps, the doctor's operating steps are increased, the operation time is increased, the difficulty of the operation is greatly increased, and the efficiency of the operation is reduced.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The object of the present invention is to provide a quick-release suction catheter to at least solve the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A quick-release suction catheter, comprising:

[0008] A main body, wherein a balloon is disposed on the main body and the balloon is sleeved on the periphery of the main body;

[0009] A supporting catheter portion, the supporting catheter portion being connected to a distal end of the main body portion, and the diameter of the supporting catheter portion being smaller than the diameter of the main body portion;

[0010] An expansion ring is connected to the distal end of the support catheter portion and is used to radially expand the expansion ring after the suction catheter is delivered into place, so that the expansion ring is tightly fixed against the blood vessel wall; one side edge of the support catheter portion is connected to one side edge of the expansion ring.

[0011] As described above, the quick-release suction catheter is preferably provided with a transition section at the front end of the main body, and the transition section is a conical structure.

[0012] As described above, for the quick-release suction catheter, preferably, the diameter of the transition section gradually decreases from the proximal end to the distal end, and the distal end of the transition section is connected to the supporting catheter portion.

[0013] As described above, in the quick-release suction catheter, preferably, the support catheter portion is eccentrically arranged relative to the main body portion, and one side of the support catheter portion is in a straight line with one side of the main body portion.

[0014] As described above, for the quick-release suction catheter, preferably, the central axis of the main body portion and the central axis of the supporting catheter portion are in a straight line.

[0015] As described above, the quick-release suction catheter is preferably provided with a first channel in the tube wall of the main body, and a connecting hole is provided on the tube wall inside the balloon, and the connecting hole is used to connect the balloon with the first channel.

[0016] As described above, the quick-release suction catheter is preferably provided with a second channel in the tube wall of the supporting catheter portion, and the second channel is communicated with the first channel.

[0017] As described above, in the quick-release suction catheter, preferably, a third channel is provided in the expansion ring, and the third channel is interconnected with the second channel.

[0018] Beneficial effects:

[0019] In the suction catheter, a supporting catheter portion with an integral connection structure is provided at the distal end of the suction catheter main body, and the diameter of the supporting catheter portion is smaller than the diameter of the main body, so that the supporting catheter portion with a smaller diameter has better permeability, and it is convenient for the supporting catheter portion to directly reach the lesion with thinner blood vessels; and the supporting catheter portion can be delivered synchronously with the suction catheter main body, and the suction catheter with the supporting catheter portion only needs to be delivered once, which reduces the surgical steps, greatly reduces the difficulty of the surgery, and improves the efficiency of the surgery.

[0020] The colinear side of the support catheter portion and the suction catheter body portion is attached to the blood vessel wall to prevent the support catheter portion from deformation. The entire suction catheter will not generate internal stress, and the suction catheter has a relatively stable state during use.

[0021] The contrast agent enters the third channel inside the expansion ring through the first channel and the second channel in sequence, causing the expansion ring to expand and adhere closely to the inner wall of the blood vessel, thereby fixing the distal end of the supporting catheter part. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0023] Figure 1 A schematic diagram of the structure of a suction catheter according to an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a suction catheter according to another embodiment of the present invention;

[0025] Figure 3 FIG. 4 is a cross-sectional view of a suction catheter according to an embodiment of the present invention.

[0026] In the figure: 1. main body; 2. balloon; 3. transition section; 4. support catheter part; 5. expansion ring; 6. first channel; 7. connecting hole; 8. second channel; 9. third channel. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0028] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0030] According to a specific embodiment of the present invention, Figure 1-3 As shown, the present invention provides a quick-release suction catheter, the suction catheter comprising:

[0031] The main body 1 is provided with a balloon 2, and the balloon 2 is sleeved on the periphery of the main body.

[0032] The supporting catheter portion 4 is connected to the distal end of the main body portion 1 , and the diameter of the supporting catheter portion 4 is smaller than the diameter of the main body portion 1 .

[0033] The expansion ring 5 is connected to the distal end of the supporting catheter portion 4 and is used for radial expansion of the expansion ring 5 after the suction catheter is delivered into place, so that the expansion ring 5 is fixed tightly against the blood vessel wall; one side edge of the supporting catheter portion 4 is connected to one side edge of the expansion ring 5.

[0034] In the suction catheter, a supporting catheter portion 4 with an integral connection structure is provided at the distal end of the suction catheter main body 1, and the diameter of the supporting catheter portion 4 is smaller than the diameter of the main body 1, so that the supporting catheter portion 4 with a smaller diameter has better permeability, and it is convenient for the supporting catheter portion 4 to directly reach the lesion with thinner blood vessels; and the supporting catheter portion 4 can be delivered synchronously with the suction catheter main body 1, and the suction catheter with the supporting catheter portion 4 only needs to be delivered once, which reduces the surgical steps, greatly reduces the difficulty of the operation, and improves the surgical efficiency.

[0035] A transition section 3 is provided at the front end of the main body 1, and the transition section 3 is a conical structure.

[0036] The diameter of the transition section 3 gradually decreases from the proximal end to the distal end, and the distal end of the transition section 3 is connected to the support catheter portion 4. In one embodiment of the present application, by providing the transition section 3 between the main body portion 1 and the support catheter portion 4, the main body portion 1 can be more smoothly transitionally connected to the support catheter portion 4, thereby increasing the smoothness of the suction catheter and improving the ability of the suction catheter to pass through the blood vessel.

[0037] The support conduit portion 4 is eccentrically disposed relative to the main body portion 1 , and one side of the support conduit portion 4 is in a straight line with one side of the main body portion 1 .

[0038] In one embodiment of the present application, such an arrangement enables, after the suction catheter is delivered into place and the expansion ring 5 is expanded and fixed in the blood vessel, the colinear side of the support catheter portion 4 and the suction catheter main body portion 1 can be attached to the blood vessel wall, and deformation of the support catheter portion 4 can be avoided. The entire suction catheter will not generate internal stress, and the suction catheter will be in a relatively stable state during use.

[0039] The central axis of the main body 1 is in a straight line with the central axis of the supporting catheter part 4. In another embodiment of the present application, the supporting catheter part 4 and the main body 1 are arranged concentrically, so that the suction catheter has a centrally symmetrical structure, which is more convenient to manufacture; however, after the suction catheter is delivered to the right place and the expansion ring 5 is expanded and fixed in the blood vessel, the supporting catheter part 4 will be partially deformed.

[0040] A first channel 6 is provided in the tube wall of the main body 1, and a connecting hole 7 is provided on the tube wall inside the balloon 2, and the connecting hole 7 is used to connect the balloon 2 with the first channel 6. In one embodiment of the present application, by delivering a contrast agent into the first channel 6, the contrast agent is delivered to the balloon 2 through the connecting hole 7, and the balloon 2 is inflated, so that the balloon 2 expands and adheres to the blood vessel wall, so as to achieve the fixation of the suction catheter main body 1.

[0041] A second channel 8 is provided in the tube wall of the supporting catheter portion 4, and the second channel 8 is communicated with the first channel 6. In one embodiment of the present application, the contrast agent can be transported to the second channel 8 through the first channel 6.

[0042] The expansion ring 5 is provided with a third channel 9, which is interconnected with the second channel 8. In one embodiment of the present application, the expansion ring 5 is hollow, and the cavity inside the expansion ring 5 constitutes the third channel 9. The contrast agent enters the third channel 9 inside the expansion ring 5 through the first channel 6 and the second channel 8 in sequence, so that the expansion ring 5 expands and adheres closely to the inner wall of the blood vessel, thereby fixing the distal end of the supporting catheter portion 4.

[0043] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A quick-release suction catheter, characterized in that: The suction catheter comprises: A main body, wherein a balloon is disposed on the main body and the balloon is sleeved on the periphery of the main body; A supporting catheter portion, the supporting catheter portion being connected to a distal end of the main body portion, and the diameter of the supporting catheter portion being smaller than the diameter of the main body portion; An expansion ring is connected to the distal end of the support catheter portion and is used to radially expand the expansion ring after the suction catheter is delivered into place, so that the expansion ring is tightly fixed against the blood vessel wall; one side edge of the support catheter portion is connected to one side edge of the expansion ring.

2. The rapid release suction catheter according to claim 1, characterized in that: A transition section is arranged at the front end of the main body, and the transition section is a conical structure.

3. The rapid release suction catheter according to claim 2, characterized in that: The diameter of the transition section gradually decreases from the proximal end to the distal end, and the distal end of the transition section is connected to the supporting catheter portion.

4. The rapid release suction catheter according to claim 3, characterized in that: The support conduit portion is eccentrically arranged relative to the main body portion, and one side of the support conduit portion is in a straight line with one side of the main body portion.

5. The rapid release suction catheter according to claim 3, characterized in that: The central axis of the main body portion and the central axis of the supporting conduit portion are in a straight line.

6. The rapid release suction catheter according to any one of claims 1 to 5, characterized in that: A first channel is arranged in the tube wall of the main body, and a connecting hole is arranged on the tube wall inside the balloon, wherein the connecting hole is used to connect the balloon with the first channel.

7. The rapid release suction catheter according to claim 6, characterized in that: A second channel is provided in the tube wall of the supporting conduit portion, and the second channel is communicated with the first channel.

8. The rapid release suction catheter according to claim 1, characterized in that: A third channel is provided in the expansion ring, and the third channel is communicated with the second channel.

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