Plaque rotary cutting sheath

Abstract

The utility model discloses a plaque rotary cutting sheath, which relates to the technical field of autologous internal arterial fistula vascular access, and adopts the scheme that the plaque rotary cutting sheath comprises a rotary cutting sheath, the rotary cutting sheath is of a hollow structure, a rotary cutting opening is formed in the rotary cutting sheath, and a rotary cutting blade is mounted on the surface wall of the first end of the rotary cutting opening; and a support dilator; the supporting expander is provided with a settling tank, and after the supporting expander is inserted into the rotary cutting sheath, the settling tank is communicated with the rotary cutting opening; wherein the rotary cutting sheath can rotate relative to the supporting dilator, the rotary cutting blade can cut off plaques in a blood vessel, and the plaques can fall into the settling tank; the rotary cutting device can be used for rotary cutting of plaques of internal arterial or venous fistula, a larger lumen is obtained, and smooth blood flow is kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to autogenous arterial internal fistula blood vessel access technical field, concretely relates to a plaque rotary cutting sheath. BACKGROUND

[0002] Chronic kidney disease (CKD) as a global public health problem, is gradually causing widespread concern. This irreversible decline in kidney function chronic disease may eventually lead to ESRD, making patients have to rely on kidney replacement therapy to maintain life activities, and it constitutes a serious threat to national health. In the treatment of ESRD patients, maintenance hemodialysis is widely used, it can effectively accelerate the removal of electrolytes and waste, and it is the main kidney replacement therapy for ESRD patients in the world. The core of dialysis treatment is the selection and maintenance of blood vessel access. Autogenous arteriovenous fistula (AVF) is the first choice for dialysis treatment blood vessel access, however, according to the clinical statistical data, the natural patency rate of AVF is only between 55% and 78% within one year. In order to prolong the service life of AVF and improve the treatment effect of ESRD, ensuring the patency of blood vessel access becomes the key.

[0003] Arteriosclerosis is the most common pathogenic factor of peripheral vascular disease. Due to physiological or pathological factors, the fat substance accumulated in the blood vessel is mixed with calcium, scar tissue and other substances, forming a relatively hard plaque. The channel in the blood vessel is affected by these plaques, forming an obstruction, and the blood flow is affected. In severe cases, the blood vessel will be completely blocked. In the prior art, the method of realizing blood vessel access is mainly balloon dilatation. The treatment method of balloon dilatation expands the stenosis of the blood vessel by pressurization. The method of balloon dilatation of the blood vessel is easy to cause the blood vessel to lose elasticity or even rupture. UTILITARIAN CONTENT

[0004] The utility model aims at providing a kind of plaque rotary cutting sheath, it can be directed to the problem that blood vessel loses elasticity or even rupture when removing plaque in the blood vessel in prior art, propose solution, it can rotary cut the plaque of arteriovenous fistula, and reduce the damage to blood vessel, greatly protect patient blood vessel.

[0005] The utility model realizes by the following technical scheme:

[0006] A kind of plaque rotary cutting sheath, comprising: rotary cutting sheath: rotary cutting sheath is hollow structure, rotary cutting sheath is opened rotary cutting mouth, and the surface wall of rotary cutting mouth first end is equipped with rotary cutting blade;And support dilator;Support dilator is equipped with settling tank, after support dilator is inserted into the inside of rotary cutting sheath, settling tank is communicated with rotary cutting mouth;Wherein, rotary cutting sheath can rotate relative to support dilator, rotary cutting blade can cut off the plaque in blood vessel, and plaque can fall into settling tank.

[0007] Further, in the utility model, the vertical height of the rotary cutting blade is H1, the vertical height of the second end of the rotary cutting mouth is H2, H1 is greater than H2;The second end of the rotary cutting mouth is connected with the inward bending blocking part, and the blocking part can prevent the plaque in the rotary cutting sheath from falling from the rotary cutting mouth.

[0008] Further, in the utility model, the surface wall of the first end of the rotary cutting mouth is provided with at least one rotary cutting blade.

[0009] Further, in the utility model, the side, away from the rotary cutting mouth, of the rotary cutting sheath is a rotating part, and the rotating part is provided with concave-convex lines capable of increasing friction force along the circumference.

[0010] Further, in the utility model, the rotating part is provided with an indicating part, and the indicating part can reflect the spatial position of the rotary cutting mouth.

[0011] Further, in the utility model, the end, close to the settling tank, of the support dilator is connected with a flexible protection part.

[0012] Further, in the utility model, the end, close to the protection part, of the settling tank is connected with a connecting part, the connecting part is sequentially provided with a plurality of first mounting grooves along the circumference, each first mounting groove is provided with an elastic part, and the free end of the elastic part is connected with a fan-shaped push plate;Among them, a plurality of push plates can move along the center line direction of the rotary cutting sheath in the rotary cutting sheath.

[0013] Further, in the utility model, the end, away from the first mounting groove, of the push plate is provided with a plurality of spherical second mounting grooves, each second mounting groove is rotatably provided with a rotating ball, and at least part of the rotating ball is located outside the second mounting groove.

[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0015] The rotary cutting sheath can rotate relative to the support dilator, the rotary cutting sheath can drive the rotary cutting blade to rotate and cut the plaque in the blood vessel, the plaque cut in the blood vessel falls into the rotary cutting mouth, and finally falls into the settling tank, when the plaque in the settling tank accumulates to a certain degree, the support dilator is pulled out of the rotary cutting sheath, and the plaque limited in the settling tank is pulled out of the rotary cutting sheath. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the principles of the present application. In the drawings:

[0017] Figure 1 is a structural schematic view of the support dilator inserted into the rotary cutting sheath;

[0018] Figure 2 is a structural schematic view of the support dilator;

[0019] Figure 3 is a structural schematic view of the support dilator inserted into the rotary cutting sheath;

[0020] Figure 4 is a radial sectional view of the connecting piece;

[0021] Figure 5 is a sectional view of the push plate;

[0022] Figure 6 is a radial sectional view of the rotary cutting sheath at the rotary cutting opening.

[0023] The marks in the drawings and the corresponding names of the parts are as follows:

[0024] 1-rotary cutting sheath, 2-rotary cutting opening, 3-rotary cutting blade, 4-rotation part, 5-indicator, 6-support dilator, 7-settling tank, 8-connecting piece, 9-protective piece, 10-first mounting groove, 11-elastic piece, 12-push plate, 13-second mounting groove, 14-rotation ball, 15-convex and concave pattern, 16-blocking part. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with embodiments and drawings. The illustrative embodiments of the present application and the description thereof are only used to explain the present application and do not limit the present application.

[0026] In order to more clearly explain the present application, the following will be explained: the plaque in the blood vessel usually refers to the accumulation of lipids, cholesterol, calcium and other substances accumulated on the inner wall of the blood vessel, also known as atherosclerotic plaque. These plaques can cause blood vessel stenosis, affect normal blood flow, increase the risk of thrombosis, and eventually cause cardiovascular and cerebrovascular diseases. Therefore, removing the plaque in the blood vessel can reduce the occurrence of hypertension, atherosclerosis, cerebral apoplexy and other cardiovascular and cerebrovascular diseases.

[0027] EMBODIMENT

[0028] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments of the present application, the plaque of the arteriovenous fistula belongs to irregular hyperplasia, which changes the circular structure of the original blood vessel. The principle of the present application is similar to that of a pencil sharpener. The convex part deviating from the circle will be pressed by the pressure (the blood vessel is deformed due to the plaque) due to the entry of the rotary cutting sheath 1, and the deformed plaque will be rotary cut for the purpose of deformation, so as to obtain a larger lumen and maintain smooth blood flow. When removing the plaque in the blood vessel of the patient, a puncture needle is used to puncture the blood vessel of the patient's arm, and a guide wire is guided along the puncture needle. The guide wire is inserted under the guidance of the puncture needle, the puncture needle is withdrawn after the guide wire is arranged, the rotary cutting sheath 1 and the expansion tube are inserted into the treatment area in the blood vessel along the guide wire, then the guide wire and the expansion tube are withdrawn, and finally the support dilator 6 is inserted into the rotary cutting sheath 1 to support the rotary cutting sheath 1, so that the rotary cutting sheath 1 can rotary cut the plaque in the blood vessel. The rotary cutting sheath 1 has a rotary cutting opening 2 on one side, a rotary cutting blade 3 is installed on the surface wall of the first end of the rotary cutting opening 2, and one end of the rotary cutting sheath 1 is a rotating groove; one end of the support dilator 6 can be clamped into the rotating groove of the rotary cutting sheath 1, and the other end of the support dilator 6 is a sinking groove 7. The support dilator 6 can be inserted into the rotary cutting sheath 1 from the rotating groove until one end of the support dilator 6 is clamped into the rotating groove of the rotary cutting sheath 1. At this time, the sinking groove 7 of the support dilator 6 is just moved to the rotary cutting opening 2 of the rotary cutting sheath 1, and the sinking groove 7 communicates with the rotary cutting opening 2. The rotary cutting sheath 1 can rotate relative to the support dilator 6, and the rotary cutting sheath 1 can drive the rotary cutting blade 3 to rotary cut the plaque in the blood vessel. The plaque removed from the blood vessel will fall into the rotary cutting opening 2, and finally fall into the sinking groove 7. When the plaque in the sinking groove 7 accumulates to a certain degree, the support dilator 6 is withdrawn from the rotary cutting sheath 1, and the plaque limited in the sinking groove 7 will be withdrawn from the rotary cutting sheath 1. Then the support dilator 6 is inserted into the rotary cutting sheath 1 again, and the rotary cutting of the plaque in the blood vessel is continued. The rotary cutting of the plaque by the rotary cutting blade 3 will reduce the damage to the blood vessel and greatly protect the blood vessel of the patient. The passive mechanical plaque removal operation is more simple and can be repeated multiple times. The rotary cutting opening 2 cuts and collects the blood plaque at the same time, improving the plaque removal efficiency.

[0029] Please refer to Figure 6 . For example, the rotary cutting blade 3 is installed on the surface wall of the first end of the rotary cutting opening 2, and the rotary cutting blade 3 is inwardly opened. The vertical height of the rotary cutting blade 3 is H1, the vertical height of the relative end (second end) of the rotary cutting opening 2 relative to the rotary cutting blade 3 is H2, and when the rotary cutting sheath 1 rotates relative to the support dilator 6, the rotary cutting blade 3 will rotary cut in the blood vessel and can cut the plaque in the blood vessel.

[0030] The second end of the rotary cutting opening 2 is connected with a blocking part 16, and the rotary cutting blade 3 is higher than the blocking part 16. When the rotary cutting blade 3 cuts the plaque, the cut plaque is clamped between the rotary cutting blade 3 and the blocking part 16. When the rotary cutting blade 3 cuts the plaque in the blood vessel, the cut plaque extrudes the plaque clamped between the rotary cutting blade 3 and the blocking part 16, causing the blocking part 16 (which can be made of rubber) to bend inwardly of the rotary cutting sheath 1, increasing the rotary cutting opening 2, so that the plaque can fall into the rotary cutting sheath 1 from the rotary cutting opening 2, and so on. When the rotary cutting blade 3 does not cut the plaque, the blocking part 16 returns to the original state, and the blocking part 16 can block part of the rotary cutting opening 2, avoiding the problem that the plaque in the rotary cutting sheath 1 falls from the rotary cutting opening 2 into the blood vessel.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3 . For example, the surface wall of the first end of the rotary cutting opening 2 can be provided with a plurality of rotary cutting blades 3, and the interval distance of the plurality of rotary cutting blades 3 can be set according to different treatment requirements. Compared with installing one rotary cutting blade 3 with a large size on the rotary cutting opening 2, installing a plurality of rotary cutting blades 3 with small sizes can reduce the cutting area of the rotary cutting blade 3, and the service life is relatively long and is not easy to be damaged. Further, the rotary cutting opening 2 can also be provided with one rotary cutting blade 3 with a large size, and the rotary cutting area of the rotary cutting blade 3 with a large size is larger, which can complete the treatment task faster; further, the rotary cutting blade 3 can be installed obliquely on the rotary cutting opening 2, and the inclination angle of the rotary cutting blade 3 relative to the rotary cutting opening 2 can be set according to the treatment requirement. The greater the inclination angle of the rotary cutting blade 3 relative to the rotary cutting opening 2, the greater the thickness of the plaque or intima that can be cut by the rotary cutting blade 3.

[0032] For example, the side of the rotary cutting sheath 1 away from the rotary cutting opening 2 is a rotating part 4, and the rotating part 4 is provided with a concave-convex pattern 15 capable of increasing the friction force in the circumferential direction. When the plaque in the blood vessel of the patient is removed, the support dilator 6 can be inserted into the rotary cutting sheath 1, one end of the support dilator 6 is clamped into the rotating part 4, and the rotary cutting sheath 1 can rotate relative to the support dilator 6 to cut the plaque in the blood vessel. The outer side wall of the rotating part 4 is provided with the concave-convex pattern 15, which is more convenient for medical staff to rotate the rotary cutting sheath 1.

[0033] The rotation part 4 of the rotary cutting sheath 1 is provided with an indicating part 5. When the support dilator 6 is pulled out of the rotary cutting sheath 1, the rotary cutting opening 2 needs to be directed upward, so that all the plaques in the settling groove 7 can be discharged. If the rotary cutting opening 2 is directed downward, part of the plaques in the settling groove 7 can fall into the rotary cutting opening 2 between the rotary cutting sheath 1 and the blood vessel. If the indicating part 5 and the rotary cutting opening 2 are both located above the rotary cutting sheath 1, when the support dilator 6 is pulled out of the rotary cutting sheath 1, the indicating part 5 needs to be located above the rotary cutting sheath 1. If the indicating part 5 and the rotary cutting opening 2 are located in opposite directions of the rotary cutting sheath 1, when the support dilator 6 is pulled out of the rotary cutting sheath 1, the indicating part 5 needs to be located below the rotary cutting sheath 1, and so on.

[0034] For example, the flexible protection part 9 is connected to one end of the support dilator 6 close to the settling groove 7. When the support dilator 6 is inserted into the rotary cutting sheath 1, the protection part 9 at one end of the support dilator 6 will not cause damage to the blood vessel. Moreover, the protection part 9 has a certain elasticity, and when the support dilator 6 is pulled out of the rotary cutting sheath 1, the protection part 9 can discharge the plaques in the settling groove 7 to a greater extent.

[0035] Please refer to Figure 4 In some embodiments of the present application, one end of the settling groove 7 is provided with a connecting part. The connecting part is sleeved on one end of the settling groove 7, and the outer side wall of the connecting part is sequentially provided with a plurality of first mounting grooves 10 in the circumferential direction. Each first mounting groove 10 can be provided with a fan-shaped push plate 12, and the push plate 12 and the surface wall of the first mounting groove 10 can be connected by rubber with a large elastic coefficient. The plurality of push plates 12 can form a semicircular structure, thereby reducing the distance between adjacent two push plates 12. When the support dilator 6 is pulled out of the rotary cutting sheath 1, the plurality of push plates 12 form a semicircular structure downward, so that the plaques in the rotary cutting sheath 1 can be discharged. Since the push plate 12 and the first mounting groove 10 are connected by rubber, the push plate 12 can be tightly attached to the inner side wall of the rotary cutting sheath 1 under the elastic action of the rubber, thereby improving the completion rate of discharging the plaques. Moreover, the distance between adjacent two push plates 12 is relatively small, thereby increasing the capture rate of the plaques. Further, when the support dilator 6 is inserted into the support dilator 6, the semicircular structure formed by the plurality of push plates 12 needs to be downward, so as to avoid the rotary cutting opening 2 from hindering the plurality of push plates 12.

[0036] Please refer to Figure 5For example, the push plate 12 is provided with a plurality of spherical second mounting grooves 13 at one end away from the first mounting groove 10, the plurality of second mounting grooves 13 are arranged along the extension direction of the push plate 12, and each second mounting groove 13 is rotatably mounted with a rotating ball 14, and the rotating ball 14 can rotate 360° in the second mounting groove 13. When the rotary cutting sheath 1 rotates the plaque relative to the support dilator 6, the plurality of rotating balls 14 on the push plate 12 can be rotatably matched with the inner side wall of the rotary cutting sheath 1, so that the push plate 12 is prevented from being in large friction with the inner side wall of the rotary cutting sheath 1, and the efficiency of plaque rotary cutting is affected. When the support dilator 6 is pulled out of or inserted into the rotary cutting sheath 1, the plurality of rotating balls 14 on the push plate 12 can be rotatably matched with the inner side wall of the rotary cutting sheath 1, so that the support dilator 6 is more easily pulled out of or inserted into the rotary cutting sheath 1.

[0037] In summary, the embodiment of the utility model provides a kind of plaque rotary cutting sheath 1, rotary cutting sheath 1 can be rotated relative to support dilator 6, rotary cutting sheath 1 can drive rotary cutting blade 3 in blood vessel and rotate plaque, plaque is cut off in blood vessel and falls into rotary cutting 2, and plaque finally falls into settling tank 7, when plaque in settling tank 7 is accumulated to a certain degree, support dilator 6 is pulled out of rotary cutting sheath 1, and plaque limited in settling tank 7 is pulled out of rotary cutting sheath 1 simultaneously.Then support dilator 6 is inserted into rotary cutting sheath 1 again, and continue to rotate plaque in blood vessel.Rotary cutting blade 3 is used to rotate plaque, which will achieve greater lumen, greatly ensure blood vessel patency;Passive mechanical plaque is used, and operation is more convenient, and it can be repeated multiple times;Rotary cutting blade is used to rotate plaque and collect simultaneously, improve plaque removal efficiency.

[0038] The above-described specific embodiments have been further described in detail for the purpose of illustrating the purpose, technical solutions and beneficial effects of the utility model, and it should be understood that the above-described specific embodiments are only specific embodiments of the utility model, and are not used to limit the protection scope of the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A plaque rotator sheath (1) characterized in that, The application relates to a rotary cutting sheath (1) and a support dilator (6). The rotary cutting sheath (1) is provided with a rotary cutting opening (2) on the side wall, and a rotary cutting blade (3) is arranged on the surface wall of the first end of the rotary cutting opening (2). The rotary cutting sheath (1) can rotate relative to the support dilator (6), the rotary cutting blade (3) can cut the plaque in the blood vessel, and the plaque can fall into the settling groove (7). The vertical height of the rotary cutting blade (3) is H1, the vertical height of the second end of the rotary cutting opening (2) is H2, and H1 is greater than H2.

2. The plaque rotat ing a b l a d sheath (1) according to claim 1, characterized in that The second end of the rotary cutting opening (2) is connected with an inwardly curved blocking part (16), which can prevent the plaque in the rotary cutting sheath (1) from falling from the rotary cutting opening (2). At least one rotary cutting blade (3) is arranged on the surface wall of the first end of the rotary cutting opening (2).

3. The plaque rotat ing a b l a d sheath (1) according to claim 1 or 2, characterized in that The side of the rotary cutting sheath (1) away from the rotary cutting opening (2) is a rotating part (4), and the rotating part (4) is provided with concave-convex patterns (15) capable of increasing friction along the circumferential direction.

4. A plaque rotator sheath (1) according to claim 1, characterized in that, The rotating part (4) is provided with an indicating part (5) capable of reflecting the spatial position of the rotary cutting opening (2).

5. The plaque rotat ing a b l a d sheath (1) according to claim 4, characterized in that The support dilator (6) is connected with a flexible protection part (9) at the end close to the settling groove (7).

6. The plaque rotat ing a b l a d sheath (1) according to claim 1, characterized in that The end of the settling groove (7) close to the protection part (9) is connected with a connecting part, the connecting part (8) is sequentially provided with a plurality of first mounting grooves (10) along the circumferential direction, an elastic part (11) is arranged in each first mounting groove (10), and the free end of the elastic part (11) is connected with a fan-shaped push plate (12).

7. The plaque rotat ing a b l a d sheath (1) according to claim 6, characterized in that The plurality of push plates (12) can move along the center line direction of the rotary cutting sheath (1) in the rotary cutting sheath (1). The end of the push plate (12) away from the first mounting groove (10) is provided with a plurality of spherical second mounting grooves (13), a rotating ball (14) is rotatably arranged in each second mounting groove (13), and at least part of the rotating ball (14) is located outside the second mounting groove (13).

8. The plaque rotat ing a b l a d sheath (1) according to claim 7, characterized in that ​

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