A vascular plaque rotary cutting knife system

Abstract

The present invention discloses a vascular plaque rotary cutter system, which is composed of a rotary cutter system and a medicine dressing system, wherein: the rotary cutter system is formed by connecting a conical filter and a coaxial outer sheath tube, a coaxial inner cutter is nested in the coaxial outer sheath tube, the coaxial outer sheath tube and the coaxial inner cutter are respectively provided with an outer sheath knob and a cutter knob at the distal ends, and a medicine injection port is reserved on one side of the coaxial inner cutter; the medicine dressing system is a medicine storage device. It has the functions of multi-angle rotary cutting of plaques, separation of plaques and blood, adaptability to complex shapes of blood vessels, and can also be used as a medicine dressing sheath tube alone, and has the advantages of flexible and convenient operation, minimally invasive and efficient treatment, and reasonable and cheap cost.

Description

Technical Field

[0001] The present invention belongs to a medical auxiliary device, and specifically relates to a vascular plaque rotary cutting knife system. The vascular plaque rotary cutting knife system has the functions of multi-angle rotary cutting of plaques, separation of plaques and blood, adaptability to complex blood vessel shapes, and can also be used as a medicine dressing sheath alone, and is suitable for the treatment of plaques of different degrees. Background Art

[0002] Plaques mainly refer to atherosclerotic plaques, which are the culprits that cause arterial stenosis and blood vessel blockage. The formation of plaques is related to lipids, platelet aggregation, and metabolic waste deposition, and can be induced by factors such as dyslipidemia and bad habits. If the plaque in the blood vessel ruptures, it may aggravate the blockage and cause acute cerebral infarction or acute myocardial infarction, posing a certain threat to the patient's life and health. Currently, there are several treatment methods: drug therapy, vascular interventional therapy, and surgical treatment. Among them, vascular interventional therapy is less invasive and more effective, and is a more popular treatment method.

[0003] Vascular intervention can generally be divided into two mechanisms:

[0004] (1) Vascular plasticity (Remodleing): Balloon angioplasty and stent expansion and other means can cause plaques or thrombi to deform, crush, and tear, and the morphology of the vascular lumen changes. Debulking is used to remove plaques, thrombi, hyperplastic intimal and other substances in the blood vessels to reduce the load of intraluminal treatment and expand the lumen capacity.

[0005] (2) Commonly used devices: traditional balloons, special balloons (cutting balloons, scored balloons, chocolate balloons, double-guidewire balloons, spinous process balloons), stents (bare stents, covered stents, drug-eluting stents, biodegradable stents), etc. Volume reduction devices mainly include: directional plaque rotational excision, mechanical embolectomy, laser plaque removal, and plaque rotational atherectomy.

[0006] Vascular plaques develop slowly, and there are not many symptoms in the early stages of the disease. As a result, many people miss the best time for treatment. If not treated in time, severe cases may even lead to death. Atherosclerosis, which causes plaques, is the main cause of cardiovascular disease. According to data, about 20 million people die from atherosclerotic diseases each year worldwide, and 36.2% of Chinese residents over 40 years old suffer from atherosclerosis. If the coronary artery is atherosclerotic and the narrow area of ​​the tube diameter reaches more than 75%, symptoms such as angina pectoris, myocardial infarction, arrhythmia and even sudden death may occur, bringing a serious public health burden to society. Therefore, predicting the risk of atherosclerotic plaques through calcium score examination in the early stage, and timely intervention and treatment are the key to preventing cardiovascular diseases such as myocardial infarction.

[0007] Surgical removal of plaques can cause trauma, and minimally invasive treatments are gaining more and more attention. In recent years, with the development of new plaque removal equipment, plaque rotary cutting knife systems have been widely used in vascular plaque treatment because they can efficiently remove plaques, reduce the dosage of plaque removal drugs and the risk of bleeding. Instrument-assisted plaque rotary cutting is fast-acting, precise in positioning, and has few side effects. There is no biochemical damage to non-target areas similar to drugs. However, the human body has a well-developed vascular network, a complex structure, and a tortuous shape. Existing instruments have more or less technical blind spots and cannot effectively complete the cleaning task. There is an urgent need for a vascular plaque rotary cutting knife system that can efficiently complete plaque removal.

[0008] It can be seen that the existing vascular plaque rotary cutting knife system and its operation method are not satisfied with solving the current "medical, teaching and research" problems in this field. It is necessary to design a system that can be suitable for patients with different plaque degrees and vascular inner diameters, thereby expanding the diagnosis rate of plaque types. Summary of the invention

[0009] In view of the defects or shortcomings existing in the above-mentioned prior art, the object of the present invention is to provide a vascular plaque rotary cutting knife system, which has the functions of multi-angle rotary cutting of plaques, separation of plaques and blood, adaptability to complex blood vessel shapes, and can also be used as a medicine dressing sheath alone.

[0010] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0011] A vascular plaque rotary cutting knife system, characterized in that it is composed of a rotary cutting knife system and a dressing system, wherein:

[0012] The rotary cutter system is formed by connecting a conical filter screen and a coaxial outer sheath tube, a coaxial inner cutter is nested in the coaxial outer sheath tube, an outer sheath tube knob and a cutter knob are respectively arranged at the distal ends of the coaxial outer sheath tube and the coaxial inner cutter, and a drug injection port is reserved on one side of the coaxial inner cutter;

[0013] The medicine application system is a medicine storage device.

[0014] According to the present invention, the coaxial inner cutter comprises a forward cutter and a backward cutter, and a drug injection tube connected to the drug injection port is arranged inside the coaxial inner cutter.

[0015] Furthermore, a cutter direction mark is also provided on the coaxial outer sheath tube.

[0016] Specifically, the drug storage device is connected with a drug delivery tube.

[0017] Preferably, the conical filter screen, the coaxial outer sheath tube and the coaxial inner cutter are made of a tough biological material.

[0018] The vascular plaque rotary cutting knife system of the present invention has the functions of rotary cutting plaques at multiple angles, separating plaques from blood, adapting to complex shapes of blood vessels, and also being able to be used alone as a medicine dressing sheath tube. It has the advantages of flexible and convenient operation, minimally invasive and efficient treatment, and low and reasonable cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of hemodynamics of normal blood vessels and thromboembolism, wherein (a) is a schematic diagram of normal blood vessels and stable hemodynamics, and (b) is a schematic diagram of plaque-occluded blood vessels and disordered hemodynamics;

[0020] Figure 2 Schematic diagram of the appearance structure of the rotary cutter system of the atherectomy system of the present invention; wherein the upper left figure is a front view of the structure in the backward cutter mode, the upper right figure is a left view of the structure in the backward cutter mode, the lower left figure is a front view of the structure in the knife collection mode, and the lower right figure is a right view of the structure in the knife collection mode;

[0021] Figure 3 It is a schematic diagram of the internal structure of the rotary cutter system, wherein the upper figure is a schematic diagram of the coaxial inner cutter structure, and the lower figure is a schematic diagram of the coaxial outer sheath structure;

[0022] Figure 4 The figure is a schematic diagram of the forward cutter mode structure of the rotary cutter system, wherein the upper figure is a schematic diagram of the cutter movement direction, and the lower figure is a schematic diagram of the forward cutter structure;

[0023] Figure 5 The figure above is a schematic diagram of the backward cutting mode structure of the rotary cutter system, wherein the upper figure is a schematic diagram of the cutting direction of movement, and the lower figure is a schematic diagram of the backward cutting structure;

[0024] Figure 6 It is a schematic diagram of the structure of the medicine application system;

[0025] Figure 7 It is a schematic diagram of the operation of the forward cutting knife of the atherectomy system of the embodiment moving counterclockwise;

[0026] Figure 8 It is a schematic diagram of the operation of the atherectomy system of the embodiment of the backward cutting knife moving clockwise;

[0027] Fig. 9 Schematic diagram of the clockwise drug application movement direction of the atherectomy system of the embodiment;

[0028] Fig.10 Schematic diagram of the anti-clockwise drug application movement direction of the atherectomy system of the embodiment;

[0029] The marks in the figure respectively represent: 1. filter, 2. outer sheath knob, 3. cutter knob, 4. cutter direction mark, 5. main drug inlet, 6. coaxial outer sheath, 7. coaxial inner cutter, 8. backward cutter, 9. forward cutter, 10. drug outlet, 11. drug storage device, 12. drug delivery tube, 13. plaque, 14. vascular injury segment.

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0031] This embodiment provides a vascular plaque rotary cutting knife system, which is composed of a rotary cutting knife system and a medicine application system, wherein:

[0032] The rotary cutter system is formed by connecting a conical filter screen 1 and a coaxial outer sheath tube 6, a coaxial inner cutter 7 is nested in the coaxial outer sheath tube 6, an outer sheath tube knob 2 and a cutter knob 3 are respectively provided at the distal ends of the coaxial outer sheath tube 6 and the coaxial inner cutter 7, and a drug injection port 5 is left on one side of the coaxial inner cutter 7;

[0033] The medicine application system is a medicine storage device.

[0034] The rotary cutting knife system has the functions of multi-angle rotary cutting of plaques, separation of plaques and blood, and adaptability to complex shapes of blood vessels.

[0035] The dressing system includes the function of the dressing sheath.

[0036] This embodiment provides a vascular plaque rotary cutting knife system, which can be applied to plaque rotary cutting and medication application processes in different scenarios.

[0037] The following is divided into two parts:

[0038] Part 1: Atherectomy System

[0039] (I) Normal blood vessels and plaque blockage

[0040] The atherectomy system provided in this embodiment is suitable for blood vessels with complex structures and tortuous shapes.

[0041] Depend on Figure 1 As shown in (a), there is no plaque in the lumen of a normal blood vessel, the intima is smooth, and the hemodynamics is stable; Figure 1 The blood vessel blocked by plaques shown in (b) has a rough inner membrane, a tortuous shape, and disordered hemodynamics. Through the operation of the vascular plaque rotary cutting device, the purpose of unblocking blood vessels and stabilizing hemodynamics is achieved.

[0042] (II) Peeling knife system

[0043] The rotary cutter system looks like Figure 2As shown, the conical filter 1, the coaxial outer sheath 6 and the coaxial inner cutter 7 are made of tough biological materials with smooth outer layers. During use, the conical filter 1 and the coaxial outer sheath 6 in the rotary cutter system partially enter the blood vessel, and the outer sheath knob 2 and the cutter knob 3 remain outside the blood vessel for the doctor to adjust the direction and angle of the rotary cutter.

[0044] The internal structure of the rotary cutter system is formed by connecting a conical filter 1 and a coaxial outer sheath 6, and a coaxial inner cutter 7 is nested in the coaxial outer sheath 6. For ease of understanding, in this embodiment, the vascular plaque rotary cutter device is divided into a head section, a middle section, and a tail section; the head section is the filter 1, which is conical and is used to collect the plaque fragments dropped by rotary cutting to minimize the migration of fragments in the body and cause obstruction in other parts. The rear of the filter 1 is connected to the coaxial outer sheath 6;

[0045] The middle section is a coaxial outer sheath tube 6 , in which a coaxial inner cutter 7 is nested.

[0046] The distal ends of the nested coaxial outer sheath 6 and coaxial inner cutter 7 are the tail section, which is respectively provided with an outer sheath knob 2 and a cutter knob 3, which represent the direction of the cutter opening. During use, the outer sheath knob 2 and the cutter knob 3 are outside the body, and the angle and direction of the coaxial inner cutter 7 can be adjusted according to the shape of the plaque.

[0047] The coaxial inner cutter 7 structure and the coaxial outer sheath structure inside the rotary cutter system are as follows: Figure 3 As shown. It includes a forward cutter 9 and a backward cutter, and a drug injection tube connected to the drug injection port is provided inside the coaxial inner cutter. The cutter direction mark 4 is set on the coaxial outer sheath 6,

[0048] Figure 4 A schematic diagram of the forward cutter mode structure of the rotary cutter system is given, wherein the upper figure is a schematic diagram of the cutter movement direction, and the lower figure is a schematic diagram of the forward cutter 9 structure; there is a drug outlet 10 on the forward cutter 9.

[0049] Figure 5 A schematic diagram of the structure of the backward cutter mode of the rotary cutter system is given, wherein the upper figure is a schematic diagram of the cutter movement direction, and the lower figure is a schematic diagram of the structure of the backward cutter 8; similarly, there is a drug outlet 10 on the backward cutter 8.

[0050] (III) Medication system

[0051] like Figure 6 The drug application system is a drug storage device 11, and a drug delivery tube 12 is provided on the drug storage device 11. The drug delivery tube 12 is connected to the drug injection port 5 of the tail section of the rotary cutter system. The drug storage device 11 squeezes the drug into the rotary cutter system through the drug delivery tube 12, and then enters the blood vessel from the drug outlet 10 of the rotary cutter system to apply to the damaged part of the blood vessel.

[0052] Part II: Specific operation and maintenance of atherectomy system

[0053] (I) Atherectomy

[0054] The vascular plaque rotary cutter system provided in this embodiment is an auxiliary instrument for surgical operations. Before the operation is performed, it is necessary to operate in strict accordance with the surgical procedure. Before using the vascular plaque rotary cutter system, check whether the equipment is complete and whether the connections between the various connection ports are tight and fixed. Then determine the degree of plaque blockage by ultrasonic visual means, and select the puncture point and entry depth of the vascular plaque rotary cutter system. And use a marking pen to draw the approximate location of the plaque on the patient's skin to avoid misoperation. Adjust the posture according to the patient's body shape and thrombus location, and the patient can lie down or sit. According to the distribution of the plaque in the blood vessel and the size of the inner diameter of the blood vessel, first adjust the outer sheath knob to determine the plaque position, and then adjust the angle and size of the cutter knob, and use an operating method of rotating the plaque while moving the system back and forth to recover the plaque fragments.

[0055] See also Figure 7 and Figure 8 , Figure 7 and Figure 8 The schematic diagrams of the forward movement of the atherectomy system of the embodiment of the atherectomy system are respectively given. When the atherectomy system enters the blood vessel, it moves from right to left (counterclockwise, Figure 7 ), or when the rotary cutting system enters the blood vessel, it moves from left to right (clockwise, Figure 8 ), by adjusting the outer sheath knob 2 and the cutter knob 3, the coaxial inner cutter 7 performs multi-angle rotary cutting and separation on the plaque 13 in the blood vessel, and the fragments separated from the plaque 13 are collected by the filter 1, which minimizes the migration of the fragments in the body and causes obstruction in other parts.

[0056] (II) Application of medication

[0057] See also Fig. 9 and Fig.10 , Fig. 9 and Fig.10 Schematic diagrams of the clockwise and counterclockwise drug application movement directions of the vascular plaque rotary cutting knife system are respectively given. If the patient has vascular endothelial damage, the drug can be injected through the drug injection port 5 at the tail end of the system. By adjusting the outer sheath knob 2 and the cutter knob 3, the drug is positioned at the damaged blood vessel segment 14, and the drug is squeezed out and the rotary cutting system is moved back and forth to evenly apply the drug to the damaged blood vessel segment 14 in the blood vessel.

[0058] After the operation is completed, the rotary cutting knife system is pulled out, and the wound is sutured, disinfected, and bandaged. The used rotary cutting knife system is recycled according to the medical waste treatment method to prevent medical waste pollution.

[0059] (III) System maintenance

[0060] The atherectomy system provided in this embodiment is a medical device and needs to be strictly aseptically sealed and placed in a cool, dry and ventilated place. Before use, the skin near the target area of ​​thrombus should be disinfected and draped in strict accordance with the surgical regulations. After the operation, medical devices and waste materials should be recycled in accordance with the hospital's infection control regulations. After the operation, turn off the power and put the items away.

Claims

1. A vascular plaque rotary cutting knife system, characterized in that: It consists of a rotary cutter system and a dressing system, including: The rotary cutter system is formed by connecting a conical filter screen and a coaxial outer sheath tube, a coaxial inner cutter is nested in the coaxial outer sheath tube, an outer sheath tube knob and a cutter knob are respectively arranged at the distal ends of the coaxial outer sheath tube and the coaxial inner cutter, and a drug injection port is reserved on one side of the coaxial inner cutter; The medicine application system is a medicine storage device; The coaxial inner cutter comprises a forward cutter and a backward cutter, and a drug injection tube connected to the drug injection port is arranged inside the coaxial inner cutter; The medicine storage device is connected with a medicine transmission tube.

2. The atherectomy system according to claim 1, characterized in that: The coaxial outer sheath tube is also provided with a cutter direction mark.

3. The atherectomy system according to claim 1, characterized in that: The conical filter is used to collect the plaque fragments dropped by rotary cutting.

4. The atherectomy system according to claim 1, characterized in that: The conical filter screen, the coaxial outer sheath tube and the coaxial inner cutter are made of tough biological materials.

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