Intravascular forward vibration wave type penetrating microcatheter

Abstract

The utility model discloses an intravascular forward vibration wave type punch-through microcatheter, which comprises a vibration wave microcatheter (4), an ultrasonic vibration part (5) and a vibration driving control system (6), when the intravascular forward vibration wave type punch-through microcatheter is operated and used, the front section of the vibration wave microcatheter (4) intervenes into a blood vessel (1) of a human body, and the front end of the vibration wave microcatheter (4) reaches a blocked part in the blood vessel (1); and the rear end of the ultrasonic vibration part (5) is connected with the ultrasonic vibration part (5) with a vibration driving control system (6). The scheme has forward vibration control capability, can provide directional vibration with specified frequency and power, and is used for damaging calcified tissues at a focus, so that the inner diameter of a blood vessel at the focus is enlarged; meanwhile, by means of the amplitude dynamic control method of the vibration antifriction effect, the viscous resistance of blood to the guide wire is reduced, surgical instruments of the intervention system can rapidly pass through a target focus along the guide wire, and the surgical efficiency and the success rate are greatly improved.

Description

Technical Field

[0001] The utility model relates to a micro catheter, in particular to an intravascular forward shock wave penetrating micro catheter, belonging to the technical field of medical devices. Background Art

[0002] Coronary intervention generally refers to percutaneous coronary intervention, which is a minimally invasive treatment method and is mostly used to treat coronary heart disease, angina pectoris, myocardial infarction, etc. At present, coronary intervention is one of the most effective leading treatment options for patients with severe coronary heart disease. Its operation process requires the use of one or more dedicated micro catheters, balloons, stents, etc. with a diameter of 0.014 inches for wire delivery to be completed. In clinical practice, balloons and the like cannot pass through high-resistance lesions in blood vessels, which has also become the main obstacle to coronary intervention.

[0003] In the prior art, for the above technical problems, there are mainly the following treatment methods:

[0004] 1) Replace the rotational atherectomy wire and initiate intracoronary rotational atherectomy. However, most commonly used coronary micro catheters for such lesions still cannot pass through, so the rotational atherectomy wire cannot be successfully replaced, resulting in operation failure;

[0005] 2) Initiate laser treatment. Although this is an effective method, it requires the use of special devices (convalescent instruments), the surgical cost is expensive, and the effect on severely calcified lesions is relatively poor;

[0006] 3) When re-operating, pass another wire through the lesion at a different location. Such operation processing is not only time-consuming but also has a lower success rate. Once the wire passes through the lesion, clinically, it is necessary to efficiently and quickly implant balloons, stents, etc. for dilation along this wire to quickly complete coronary intervention and reduce complications. Therefore, the surgical success rate of this method is generally low and the clinical effect is poor.

[0007] As a doctor who has worked in Nanjing First Hospital (also known as Nanjing Hospital Affiliated to Nanjing Medical University) for many years, through cooperation with teachers from medical universities and practical verification, the inventor of this case proposed an intravascular forward shock wave penetrating micro catheter based on the shock wave friction reduction effect in human blood vessels, which not only improves the working efficiency of micro catheter intervention surgery, reduces the operation difficulty of doctors, but also greatly reduces clinical complications and improves the surgical success rate. Summary of the Invention

[0008] The purpose of the utility model is to provide an intravascular forward shock wave penetrating micro catheter to solve the problem that during the intervention treatment of high-resistance coronary lesions (such as chronic total occlusion lesions, severe stenosis and calcification lesions, etc.), the wire can pass through while other auxiliary devices cannot pass through, resulting in generally low surgical success rate and poor clinical effect.

[0009] The technical solution of the present utility model is: an intravascular forward shock wave penetrating microcatheter, comprising a shock wave microcatheter, an ultrasonic vibration part and a vibration driving control system, characterized in that: during operation, the front section of the shock wave microcatheter intervenes into the blood vessel of the human body, the front end of the shock wave microcatheter reaches the occlusion inside the blood vessel, and the rear end of the shock wave microcatheter is externally drivingly connected to the ultrasonic vibration part; the ultrasonic vibration part is electrically connected to the vibration driving control system.

[0010] Further, for the above-mentioned intravascular forward shock wave penetrating microcatheter, wherein: the shock wave microcatheter is a single-layer flexible catheter structure, and a hydrophilic coating for reducing protein and bacteria adsorption is provided on the outer side wall of the shock wave microcatheter.

[0011] Furthermore, for the above-mentioned intravascular forward shock wave penetrating microcatheter, wherein: the head end of the shock wave microcatheter is designed to contain titanium alloy components, and the connected body part is designed to be woven and inlaid by 4 steel wires with a diameter of Φ0.18mm. The shock wave microcatheter reaches the front section of the occlusion inside the blood vessel and contacts the calcified and fibrous tissues at the occluded or narrowed part.

[0012] Still further, for the above-mentioned intravascular forward shock wave penetrating microcatheter, wherein: it further includes a catheter injection part for introducing surgical instruments into the blood vessel, preferably located at the side hole at the tail end of the shock wave microcatheter.

[0013] Furthermore, for the above-mentioned intravascular forward shock wave penetrating microcatheter, wherein: the vibration driving control system includes a data acquisition module, a data transmission module, a data processing module, a main control module and a vibration control module that are communicatively connected in sequence. The ultrasonic vibration part is connected to the main control module and the vibration control module through a data transmission line, and a data acquisition module, a data transmission module and a data processing module are communicatively provided between the ultrasonic vibration part and the main control module. The shock wave microcatheter is connected to the vibration control module through the data transmission line.

[0014] Wherein, the main control module is further communicatively connected with an amplitude adjustment module and a frequency adjustment module, and is connected to the vibration control module for receiving vibration amplitude and frequency control data through the amplitude adjustment module and the frequency adjustment module.

[0015] Adopting the technical solution of the present utility model, under external control, the head end of the shock wave microcatheter is sent along the guide wire to the front section of the blood vessel occlusion and contacts the calcified and fibrous tissues at the occluded or narrowed part. The ultrasonic vibration part is effectively operated by driving through the vibration driving control system. Energy is transmitted from the ultrasonic vibration part to the shock wave microcatheter, and its front end is controlled to vibrate effectively forward, so as to effectively loosen the calcified and fibrous tissues, thereby breaking through the blood vessel stenosis area and completing the whole process of the entry and passage of the surgical instrument intervention system.

[0016] Compared with the prior art, after adopting the technical solution of the present utility model, the vibration wave microcatheter has the ability to control forward vibration, can provide directional vibration with specified frequency and power to destroy the calcified tissue at the lesion, thereby expanding the inner diameter of the blood vessel at the lesion; at the same time, through the amplitude dynamic control method of the vibration friction reduction effect, the viscous resistance of the blood to the guide wire is reduced, enabling the surgical instruments of the intervention system to quickly pass through the target lesion along the guide wire, while loosening and / or breaking the high-resistance components in the local lesion, which is beneficial to the unobstructed passage of subsequent surgical instruments, greatly improving the surgical efficiency and success rate. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of part A of the present utility model;

[0019] Figure 3 It is a framework diagram of the vibration drive control system of the present utility model.

[0020] The meanings of the reference numerals in the drawings are as follows: 1 - blood vessel, 2 - calcified and fibrous tissue, 3 - blood vessel stenosis area, 4 - vibration wave microcatheter, 41 - guide wire, 5 - ultrasonic vibration part, 6 - vibration drive control system, 61 - data acquisition module, 62 - data transmission module, 63 - data processing module, 64 - main control module, 65 - amplitude adjustment module, 66 - frequency adjustment module, 67 - vibration control module, 7 - catheter injection part. Detailed Embodiment

[0021] The technical solution of the present utility model will be further elaborated below in conjunction with the drawings to make it easier to understand and master. The system component modules such as the data acquisition module 61, data transmission module 62, data processing module 63, and main control module 64 involved are all commonly known and used by those of ordinary skill in the art, and there are no special requirements for them in this case.

[0022] As Figure 1 and Figure 2 shown, a forward vibration wave type penetrating microcatheter in blood vessels in this embodiment includes a vibration wave microcatheter 4, an ultrasonic vibration part 5, and a vibration drive control system 6. During operation and use, the vibration wave microcatheter 4 is inserted into the blood vessel 1 of the human body, the front end of the vibration wave microcatheter 4 reaches the front section of the blockage inside the blood vessel 1, and the rear end of the vibration wave microcatheter 4 is drivingly connected to the ultrasonic vibration part 5 outside the blood vessel 1.

[0023] The ultrasonic vibration part 5 is electrically connected to the vibration drive control system 6. The vibration drive control system 6 can control the frequency and amplitude of the forward vibration of the vibration wave microcatheter 4, transfer the vibration energy generated by the ultrasonic vibration part 5 to the front end of the vibration wave microcatheter 4 in the blood vessel 1, and make it generate forward vibration, so that the vibration of the vibration wave microcatheter 4 is oriented, and the calcification and fibrous tissue 2 of the blood vessel 1 are broken open in an orderly manner, allowing the interventional system to enter and pass through the high-resistance stenosis or occlusion segment.

[0024] Specifically, in the structure of the above-mentioned forward vibration wave type penetrating microcatheter in the blood vessel, the vibration wave microcatheter 4 is a single-layer flexible catheter structure, and a hydrophilic coating is provided on the outer side wall of the vibration wave microcatheter 4, and this hydrophilic coating has the function of reducing protein and bacteria adsorption.

[0025] More specifically, a guide wire 41 for interventional treatment is provided at the front end of the vibration wave microcatheter 4, and it can reach the front section of the occlusion inside the blood vessel 1 along the guide wire 41 (generally seen in the clinical coronary artery interventional treatment process, after the forward guide wire passes through the target lesion, due to the obstruction of severe calcified lesions, other instruments such as balloons and surgical catheters cannot pass), and directly intervene in the blood vessel stenosis area 3 formed by the calcification and fibrous tissue 2.

[0026] This embodiment further includes a catheter injection part 7, and surgical instruments (such as special catheters, balloons or stents, etc.) are introduced into the blood vessel 1 through the catheter injection part 7. Preferably, the catheter injection part 7 can be arranged at the side hole at the tail end of the vibration wave microcatheter 4.

[0027] Preferably, as Figure 3 shown, in the above structure: the vibration drive control system 6 includes a data acquisition module 61, a data transmission module 62, a data processing module 63, a main control module 64 and a vibration control module 67 that are communicatively connected in sequence. The ultrasonic vibration part 5 is connected to the main control module 64 and the vibration control module 67 through a data transmission line, and a data acquisition module 61, a data transmission module 62 and a data processing module 63 are communicatively arranged between the ultrasonic vibration part 5 and the main control module 64. The vibration wave microcatheter 4 is connected to the vibration control module 67 through the data transmission line. The vibration data generated by the ultrasonic vibration part 5 are collected, transmitted and analyzed and processed in sequence by the data acquisition module 61, the data transmission module 62 and the data processing module 63, and the finally processed vibration data are transmitted to the main control module 64, and then transmitted to the vibration control module 67 after being adjusted and processed by the main control module 64 to act on the front end of the vibration wave microcatheter 4, so that the front end of the vibration wave microcatheter 4 generates vibration to break open the corresponding calcification and fibrous tissue 2 or directly enter the blood vessel stenosis area 3.

[0028] Among them, the main control module 64 is also communicatively connected to an amplitude adjustment module 65 and a frequency adjustment module 66, and is connected to a vibration control module 67 for receiving vibration amplitude and frequency control data through the amplitude adjustment module 65 and the frequency adjustment module 66. The amplitude adjustment module 65 and the frequency adjustment module 66 can respectively control the duty cycle of the amplitude and the frequency, while greatly increasing the directional amplitude, control the temperature aggregation generated by the impact, and meet the safety requirements of the temperature (<42 °C) when the vibration destroys the calcified tissue.

[0029] In the technical solution of the present utility model, the coordinated operation among the vibration wave microcatheter 4, the ultrasonic vibration part 5 and the vibration drive control system 6 is the technical key of this case. Figure 1 and Figure 2 What is mainly shown is the relevant components and connection structures involved in the vibration wave microcatheter 4, the ultrasonic vibration part 5 and the vibration drive control system 6, as well as the specific structure of the catheter injection part 7. For the data acquisition module 61, the data transmission module 62, the data processing module 63 and the main control module 64 set in the vibration drive control system 6, those of ordinary skill in the art can make conventional settings according to the prior art, and there are no special requirements for the model selection and combined use of them in this case.

[0030] In this way, during the interventional treatment of occlusive lesions in blood vessels (especially the occlusion or severe stenosis in coronary atherosclerotic heart disease), when a dedicated guide wire can pass through the lesion while other auxiliary instruments (including balloons, dedicated coronary interventional microcatheters, etc.) cannot pass through, resulting in the failure of the entire operation, by adopting the technical solution of the present utility model, the vibration wave microcatheter 4 is sent into the coronary artery of the patient through the dedicated guide wire commonly used in coronary artery interventional treatment. Under external control, the vibration wave microcatheter 4 is moved to the front section of the blood vessel 1 blockage, and the guide wire 41 is used to directly intervene in the vascular stenosis area 3 formed by the calcified and fibrous tissues 2. The ultrasonic vibration part 5 is effectively operated by driving the vibration drive control system 6, and energy is transmitted from the ultrasonic vibration part 5 to the vibration wave microcatheter 4 to control the effective forward vibration of its front end, so as to effectively loosen the calcified and fibrous tissues 2, thereby breaking through the vascular stenosis area 3 and completing the entire process of the entry and passage of the surgical instrument intervention system. In this way, the instrument passing rate can be significantly improved, and the success rate of the operation can be increased.

[0031] This case has the ability of forward vibration control, can provide directional vibration of specified frequency and power to destroy hard tissues such as calcification at the lesion, so as to effectively loosen the lesion and expand the inner diameter of the blood vessel at the lesion; at the same time, through the amplitude dynamic control method of the vibration friction reduction effect, the viscous resistance of the blood to the microcatheter is reduced, so that the surgical instrument for interventional blood vessels can quickly pass through the target lesion along the guide wire, and at the same time, the high-resistance components in the local lesion are loosened or broken, which is beneficial to the unobstructed passage of the subsequent surgical instrument.

[0032] As can be seen from the above description, compared with the prior art, after adopting the technical solution of the present utility model, ultrasonic vibration is utilized to stimulate the front end of the vibration wave microcatheter in the blood vessel to generate a forward driving directional vibration, and the vibration of the vibration wave microcatheter is used to destroy the blocked calcification and fibrous tissues at the lesion in the blood vessel, so as to achieve the purpose that the interventional surgical instrument can pass through smoothly and reach the specified position accurately; moreover, the vibration friction reduction effect of the vibration wave microcatheter can greatly reduce the viscous resistance of the microcatheter in the blood, improve the moving speed of the microcatheter in the blood vessel, and thus improve the surgical efficiency.

[0033] The technical solution, working process and implementation effect of the present utility model have been described in detail above. It should be noted that the described are only typical examples of the present utility model. In addition, the present utility model can also have many other specific implementation manners. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present utility model.

Claims

1. An intravascular forward vibration wave penetrating microcatheter, comprising a vibration wave microcatheter (4), an ultrasonic vibration unit (5) and a vibration drive control system (6), characterized in that: During operation, the front section of the oscillating wave microcatheter (4) is inserted into a blood vessel (1) of a human body, the front end of the oscillating wave microcatheter (4) reaches the blocked part inside the blood vessel (1), and the rear end of the oscillating wave microcatheter (4) is connected to the external drive of the ultrasonic vibration part (5); the ultrasonic vibration part (5) is electrically connected to a vibration drive control system (6).

2. The intravascular forward oscillating wave penetrating microcatheter according to claim 1, characterized in that: The oscillating wave microcatheter (4) is a single-layer flexible catheter structure.

3. The intravascular forward oscillating wave penetrating microcatheter according to claim 2, characterized in that: The outer wall of the oscillating wave microcatheter (4) is provided with a hydrophilic coating for reducing the adsorption of proteins and bacteria.

4. The intravascular forward oscillating wave penetrating microcatheter according to claim 1, characterized in that: A guide wire (41) for interventional treatment is provided at the front end of the oscillating wave microcatheter (4).

5. The intravascular forward oscillating wave penetrating microcatheter according to claim 4, characterized in that: The guide wire (41) reaches the front section of the blocked part inside the blood vessel (1) and directly intervenes in the vascular stenosis area (3) formed by calcification and fibrous tissue (2).

6. The intravascular forward oscillating wave penetrating microcatheter according to claim 1, characterized in that: It also includes a catheter injection portion (7) for inserting surgical instruments into the blood vessel (1).

7. The intravascular forward oscillating wave penetrating microcatheter according to claim 6, characterized in that: The catheter injection portion (7) is located at the side hole at the tail end of the vibration wave microcatheter (4).

8. The intravascular forward oscillating wave penetrating microcatheter according to claim 1, characterized in that: The vibration drive control system (6) comprises a data acquisition module (61), a data transmission module (62), a data processing module (63), a main control module (64) and a vibration control module (67) which are communicatively connected in sequence; the ultrasonic vibration part (5) is connected to the main control module (64) and the vibration control module (67) via a data transmission line, and a data acquisition module (61), a data transmission module (62) and a data processing module (63) are provided for communication between the ultrasonic vibration part (5) and the main control module (64); the vibration wave microcatheter (4) is connected to the vibration control module (67) via the data transmission line.

9. The intravascular forward oscillating wave penetrating microcatheter according to claim 8, characterized in that: The main control module (64) is also communicatively connected to an amplitude adjustment module (65) and a frequency adjustment module (66), and is connected to a vibration control module (67) for receiving vibration amplitude and frequency control data via the amplitude adjustment module (65) and the frequency adjustment module (66).

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