CN117379137A - An adjustable tunneling device for opening blocked arteries - Google Patents

Abstract

The invention discloses an adjustable direction tunneling device for opening arterial occlusion, which comprises: the working part comprises a drill bit, a propulsion system and a pipeline, wherein the drill bit is used for cutting the rotational-grinding plaque to open an artery when rotating, the propulsion system is used for driving the drill bit to propel the uniform rotational-cutting plaque, and the pipeline is used for providing a medicament for the drill bit and absorbing plaque fragments; the outer sheath is coated on the outer side of the working part, the pushing direction of the working part can be adjusted by the outer sheath, and the outer sheath is further used for supporting and fixing the working part. The invention can meet the requirements of clearing blood vessels with different forms, plaques with different hardness and directions, can meet the requirements of clinicians on one-step opening and plaque clearing of the blood vessels, improves the efficiency of opening the blood vessels, innovates the equipment operation convenience and the plaque clearing thoroughness, and has the advantages of greatly reducing the operation difficulty, shortening the operation time, reducing or avoiding the implantation of an internal stent, prolonging the long-term patency rate and the like.

Description

An adjustable tunneling device for opening blocked arteries

Technical field

The present invention relates to the technical field of medical devices, and in particular to an adjustable excavation device for opening arterial occlusion.

Background technique

Peripheral artery occlusion directly leads to limb ischemia, and in severe cases, amputation. The substance that causes arterial occlusion: atherosclerotic plaque (hereinafter referred to as plaque) gradually calcifies, degenerates, and hardens over the long course of the disease, making it difficult to open the occluded artery and remove the plaque with current endovascular interventional surgery. Therefore, this patent has designed an instrument with strong positioning, uniform cutting, separation, and volume reduction properties to orient the target lesion, grind it, and expel the plaque from the body to open blood vessels, reduce plaque volume, and obtain lumen and To restore blood supply.

There are currently two core steps in surgery: passing the guidewire through the diseased segment and removing plaque. All plaque removal devices on the market require the guidewire to first pass through the occlusive lesion (some even require complete true lumen passage, which is almost impossible in completely occlusive lesions), enter the distal true lumen, and guide the plaque. Clearance equipment is a necessary prerequisite. This type of equipment system includes (1) a thin metal guidewire used for positioning and passing through the plaque site. The front end of the guidewire has an inherent bend at a certain angle; (2) it is placed over the guidewire. The working part outside the wire, which can move in the direction of the guide wire and includes components such as the rotary cutter head; (3) the operating part located outside the patient's body, which controls the advancement and retreat of the rotary cutter head; (4) the connection between the operating part and the working part structure. Others include external digital subtraction angiography (DSA) equipment used to locate blood vessels and devices.

During the operation, under the DSA visual image, the operator will guide the guide wire through the occlusion segment; the rotational cutting instrument will reach the working site along the guide wire, that is, the plaque location; the operator will start the rotational cutting equipment and complete the plaque rotation. , and at the same time, the cut plaque is extracted from the body; finally, the guide wire is withdrawn. The closest existing devices to invention are Medtronic's SilverHawk and TurboHawk and Boston Scientific's Jetstream system.

Although the currently existing rotational cutting instruments have the performance of cutting and separation, they still have problems: (1) The guide wire is required to pass through the true lumen of the occluded artery segment, which is only suitable for stenotic lesions and is not suitable for completely occlusive lesions because of the hard plaque. The lumen is completely filled. When the guidewire passes, most of it passes under the arterial intima (not within the true lumen of the artery). The risk of arterial wall damage and rupture during rotation is extremely high; (2) the guidewire passes through the occluded artery. It is time-consuming and difficult to operate, sometimes difficult to open, and the operation failure rate is high; (3) Subsequent operations such as positioning and advancement all rely on guide wire delivery and lack the directionality of plaque rotation; the successful introduction and penetration of the guide wire has been It is very difficult, and it is even more difficult to pass subsequent rotational cutting instruments, because the thick-diameter rotational cutting instruments face hard, lumenless plaques, and the entire system is difficult to insert and advance, requiring a small balloon to be pre-dilated for a small period of time. The lumen can be passed through, which can easily lead to insufficient volume reduction and easily lead to arterial perforation and rupture; (4) the plaque tissue is not homogeneous and contains different components such as hard calcification, tough fibrous cap, Soft lipids, etc. In long-segment plaques that occlude arteries, the difference in force experienced by the guidewire as it travels through different components will affect its direction of travel, causing it to deviate from the original and ideal working position of the central axis of the artery lumen, making it impossible to achieve directional plaques. The purpose of block rotation; (5) Even if the guide wire passes through the target lesion, it has limitations in local fine plaque rotation and volume reduction. If the positioning is not accurate, the rotation cutting head will be close to the outer wall of the normal blood vessel at the working site, making it impossible to obtain The regular inner lumen of arteries can easily lead to wall damage, perforation, and rupture. At the same time, during plaque removal, it can easily lead to distal artery embolism and aggravate limb ischemia.

For the above problems, the reasons are: (1) The orientation and positioning of the rotational ablation equipment relies on the guide wire passing through the true lumen of the occluded artery, that is, the path the guide wire travels determines the direction of the subsequent volume reduction device, coupled with the tough texture of the completely occluded lesion, As a relatively thin metal wire, the guidewire has an absolute upper limit on its rigidity in terms of structure, regardless of material characteristics, and cannot break through some high-hardness plaques and successfully pass through the lesion. In addition, the guidewire has an inconsistent direction when traveling in the plaque. Certainty, it is easy to pass through areas other than the plaque and enter the subintima; (2) The blade of the rotational cutting equipment is often located in one direction on the side of the working part, and each rotational cutting can only remove plaque tissue in a specific direction. Complete removal of plaque requires multiple rotations of the working part to change directions and multiple rotational cuts, which is time-consuming, complex, inefficient, difficult, and requires the operator to be exposed to X-rays for a long time; even with a multi-directional rotational cutting device, It is also difficult to ensure that the blade is centered; (3) The forward and backward power of the working part depends on the pushing action of the surgeon. This action is conducted through the connecting part, and the force acting on the plaque position will change or attenuate, which affects the sensitivity of the operation. , affecting accuracy; (4) Arteries are pulsating dynamic structures, changes in blood flow and patient's muscle movements will affect the morphology of blood vessels. The adjustment of previous rotational cutting equipment is cumbersome and lacks the ability to adjust the position and direction of the rotational cutting head at any time. This is an effective way to avoid failure in time, resulting in arterial damage, rupture and bleeding; (5) In the past, the intravascular positioning of guide wires and rotational cutting equipment relied on DSA technology, and the planar image presented by DSA could only provide information about the device at a fixed position. Two-dimensional position information lacks third-dimensional depth information, which has limitations and cannot efficiently confirm the position of the device in the three-dimensional space of the blood vessel lumen.

Contents of the invention

Based on this, it is necessary to provide an adjustable excavation device for opening arterial occlusion in order to solve the above technical problems.

An adjustable tunneling device for opening blocked arteries, including:

The working part includes a drill bit, a propulsion system and a pipeline. The drill bit is used to cut the rotational plaque and open the artery when rotating. The propulsion system is used to drive the drill bit to advance the rotational plaque evenly. The pipeline is used to give The drill delivers the agent and extracts plaque debris;

An outer sheath covers the outside of the working part. The outer sheath can adjust the advancing direction of the working part, and is also used to support and fix the working part.

In one embodiment, the drill bit includes:

A cutter head, the front surface of the cutter head is smooth, and the rear surface of the cutter head is rough for rotational grinding;

A transmission rod. One end of the transmission rod is connected to the cutter head, and the other end of the transmission rod is connected to a first power source. The first power source can drive the cutter head to rotate through the transmission rod. ;

The tool holder has multiple rack grooves on the left and right sides of the tool holder. The rack grooves match the propulsion system. The cutter head is movably mounted on the end face of the tool holder. , the transmission rod movably passes through the center of the tool holder.

In one embodiment, the transmission rod is composed of several metal wires with certain bending flexibility, and the transmission rod has the rigidity to rotate around an axis.

In one embodiment, the tool holder is provided with first to third reserved holes, the first reserved hole is located at the center of the tool holder, and the inside of the first reserved hole A fitting groove is provided, the transmission rod is provided with an outwardly protruding flange, the flange is clamped in the fitting groove, and the second reserved hole and the third reserved hole are connected with the said pipes connected.

In one embodiment, the propulsion system includes:

gear base;

A gear set, installed in the gear base, the gear set includes a first gear on the right, a second gear on the right, a center gear, a second gear on the left, and a first gear on the left that mesh in sequence, and the right A worm is provided on the first gear and the first gear on the left side, and the worm meshes with the rack groove;

Transmission sleeve, one end of the transmission sleeve is connected to the center gear, the other end of the transmission sleeve is connected to the second power source, and the transmission sleeve is sleeved on the outside of the transmission rod .

In one embodiment, the pipeline includes:

A liquid feeding pipe is fixed in the second reserved hole, and one end of the liquid feeding pipe is connected to a liquid feeding water pump;

A liquid suction pipe is fixed in the third reserved hole, and one end of the liquid suction pipe is connected to a liquid suction pump.

In one embodiment, the liquid supply pipe and the liquid suction pipe are curved and flexible polymer pipes.

In one embodiment, the outer sheath includes:

The working part sheath is provided with a limiting groove along the length direction inside, and the outer surface of the knife holder is provided with a limiting convex strip along the length direction, and the limiting convex strip matches the limiting groove;

The front end of the guide sheath is connected to the working part sheath. The inner circumference of the guide sheath is provided with a number of penetrating wire holes. The wire passing holes are provided with guide wires. One end of the guide wire is fixed on the At the connection point between the guide sheath and the working part sheath, the other end of the guide wire extends to the outside of the guide sheath, and the guide wire can adjust the deflection direction of the working part;

The support sheath includes a support sheath body and a support airbag. A hole is provided on the side of the support sheath body, and the support airbag is fixed at the hole.

In one embodiment, a sensor is further provided on the front of the working part sheath.

The above-mentioned adjustable excavation device for opening arterial occlusion does not require the guide wire to pass through the occluded artery first, but directly rotates the plaque through the working part to simultaneously open the artery. The outer sheath can adjust the advancing direction of the working part and increase the flexibility of the advancing direction. , the outer sheath can also support and fix the working part, increasing the stability of its work, so that the working part can adapt to different shapes of blood vessels, plaques of different hardness, and removal requirements in different directions. At the same time, the present invention can also meet the needs of clinicians. The need to open blood vessels and remove plaques simultaneously and in one step improves the convenience of equipment operation and the uniformity and thoroughness of plaque removal. It can greatly reduce the difficulty of surgery, shorten the operation time, eliminate the need for patients to implant stents, and reduce the long-term exposure of surgeons to X-ray and other advantages.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the adjustable excavation device for opening arterial occlusion according to the present invention;

Figure 2 is a cross-sectional view of the adjustable excavation device for opening arterial occlusion according to the present invention;

Figure 3 is an exploded view of the adjustable excavation device for opening arterial occlusion of the present invention;

Figure 4 is a schematic diagram of the combination of the propulsion system and the drill bit of the present invention;

Figure 5 is a schematic structural diagram of the propulsion system of the present invention;

Figure 6 is an exploded view of the propulsion system of the present invention;

Figure 7 is a schematic structural diagram of the pipeline of the present invention;

Figure 8 is a schematic view of the state of the adjustable advancement device for opening arterial occlusion according to the present invention;

Figure 9 is a schematic diagram of the overall structure of the adjustable excavation device for opening arterial occlusion of the present invention;

Figure 10 is a schematic structural diagram of the cutter head of the present invention;

In Fig. 11, Fig. 11a, Fig. 11b and Fig. 11c are respectively a structural schematic diagram, a side view and a cross-sectional view of the propulsion part of the present invention in a pushed-out state.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough understanding of the present disclosure will be provided.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only and is not intended to limit the invention.

Referring to Figures 1-11, one embodiment of the present invention provides an adjustable excavation device for opening arterial occlusion, including:

The working part 1 includes a drill bit 11, a propulsion system 12 and a pipe 13. The drill bit 11 is used to cut the rotational plaque and open the artery when rotating. The propulsion system 12 is used to drive the drill bit 11 to advance the rotational plaque evenly. , the pipe 13 is used to provide medicine to the drill bit 11 and absorb plaque debris;

The outer sheath 2 is wrapped around the outside of the working part 1. The outer sheath 2 can adjust the advancement direction of the working part 1, and the outer sheath 2 is also used to support and fix the working part 1. Prevent damage to normal blood vessel walls (tunica media and adventitia).

The above-mentioned adjustable excavation device for opening an arterial occlusion does not require the guide wire to pass through the occluded artery first, but directly rotates the plaque through the working part 1 to open the artery at the same time. The outer sheath 2 can adjust the advancing direction of the working part 1, increasing the accuracy of the advancing direction. Flexibility, the outer sheath 2 can also support and fix the working part 1, increasing the stability of its work, so that the working part 1 can adapt to different shapes of blood vessels, plaques of different hardness, and removal requirements in different directions. At the same time, the present invention It can also meet the clinician's demand for blood vessel opening and plaque removal simultaneously and in one step, improving the convenience of equipment operation and the uniformity and thoroughness of plaque removal. It can greatly reduce the difficulty of the operation, shorten the operation time, eliminate the need for stent implantation, and reduce the cost of the operation. The surgeon is exposed to X-rays for a long time.

In an embodiment of the present invention, the drill bit 11 includes:

The cutter head 111 has a smooth front surface and a rough rear surface for rotational grinding;

Transmission rod 112. One end of the transmission rod 112 is connected to the cutter head 111, and the other end of the transmission rod 112 is connected to a first power source. The first power source can be driven by the transmission rod 112. The cutter head 111 rotates;

The knife holder 113 has a plurality of rack grooves 1131 on the left and right sides of the knife holder 113. The rack grooves 1131 cooperate with the propulsion system 12, and the cutter head 111 is movably stuck there. On the end surface of the tool holder 113 , the transmission rod 112 movably passes through the center of the tool holder 113 . Optionally, the tool seat 113 is a rigid column.

In this embodiment, the cutter head 111 is located on the front side of the drill bit 11. Its surface includes but is not limited to disk-shaped, cone-shaped, columnar and other structures. It has sharp edges and can achieve cutting and rotational grinding functions when rotated. The first power source (motor) can drive the cutter head 111 through the transmission rod 112 to perform rotational cutting. There is a limiter between the cutter head 111 and the propulsion system 12 adjacent to the cutter head 111 to ensure that the cutter head 111 can be driven forward and backward by the propulsion system 12 as a whole.

In one embodiment of the present invention, the transmission rod 112 is composed of several metal wires with certain bending flexibility, and the transmission rod 112 has the rigidity to rotate around an axis. In this way, not only can the transmission rod 112 have a certain degree of flexibility and can be bent synchronously when the outer sheath 2 adjusts the advancing direction of the working part 1, but the transmission rod 112 has the rigidity to rotate around the axis, thereby ensuring the first power. The power from the source (motor) can be reliably transmitted to the cutter head 111 through the transmission rod 112.

In an embodiment of the present invention, the tool holder 113 is provided with first to third reserved holes 1134, the first reserved hole 1132 is located at the center of the tool holder 113, and the first reserved hole 1132 is located at the center of the tool holder 113. A fitting groove 1135 is provided inside the reserved hole 1132, and an outwardly protruding flange 1121 is provided on the transmission rod 112. The flange 1121 is clamped in the fitting groove 1135, and the second predetermined The reserved hole 1133 and the third reserved hole 1134 are connected with the pipeline 13 .

In this embodiment, by the flange 1121 being clamped in the fitting groove 1135, the cutter head 111 can be installed on the cutter holder 113 and can rotate freely in the cutter holder 113.

In an embodiment of the present invention, the propulsion system 12 includes:

Gear base 121;

The gear set 122 is installed in the gear base 121. The gear set 122 includes a first gear 1221 on the right, a second gear 1222 on the right, a center gear 1223, a second gear 1224 on the left and a second gear on the left that mesh in sequence. A gear 1225, the first right gear 1221 and the first left gear 1225 are provided with a worm 1226, the worm 1226 meshes with the rack groove 1131;

Transmission sleeve 123, one end of the transmission sleeve 123 is connected to the center gear 1223, the other end of the transmission sleeve 123 is connected to the second power source, and the transmission sleeve 123 is sleeved on the The outer side of the transmission rod 112.

In this embodiment, the gear base 121 is a rigid base with reserved holes for the transmission rod 112 and the transmission sleeve 123. There are corresponding holes inside for installing the gear set 122. The side opening of the gear base 121 is used to expose the worm 1226. The worm 1226 is allowed to mesh with the rack groove 1131 . Optionally, the central gear 1223 is a hollow gear, and the transmission rod 112 can pass through and rotate freely in its interior.

It should be noted that the transmission sleeve 123 in this embodiment is a hollow, cylindrical metal sleeve with certain bending flexibility. The transmission sleeve 123 is integrally sleeved on the outside of the transmission rod 112, and the two rotate independently of each other. Driven by the second power source, the rotational power is transmitted to the center gear 1223, which then drives the right first gear 1221 and the left first gear 1225 to rotate and the worm 1226 to move.

In an embodiment of the present invention, the pipeline 13 includes:

The liquid supply pipe 131 is fixed in the second reserved hole 1133. One end of the liquid supply pipe 131 is connected to a liquid supply pump; it is used to inject physiological saline, contrast agent and other medicines into the cavity.

The liquid suction pipe 132 is fixed in the third reserved hole 1134, and one end of the liquid suction pipe 132 is connected to a liquid suction water pump. Used to suck out plaque debris and other foreign matter from the cavity.

In one embodiment of the present invention, the liquid supply pipe 131 and the liquid suction pipe 132 are curved and flexible polymer pipes. In this way, the liquid supply pipe 131 and the liquid suction pipe 132 can be bent and adjusted as the propulsion direction is adjusted.

In an embodiment of the present invention, the outer sheath 2 includes:

The working part sheath 21 is provided with a limiting groove 211 along the length direction inside, and the outer surface of the tool holder 113 is provided with a limiting protrusion 1136 along the length direction, and the limiting protrusion 1136 matches the limiting groove 211;

The front end of the guide sheath 22 is connected to the working part sheath 21. The guide sheath 22 is provided with a number of wire passing holes 221 in the inner circumference. The wire passing holes 221 are provided with guide wires 222. The guide wires are One end of the guide wire 222 is fixed at the connection between the guide sheath 22 and the working part sheath 21, and the other end of the guide wire 222 extends to the outside of the guide sheath 22. The guide wire 222 can adjust the working part 1 deflection direction;

The support sheath 23 includes a support sheath body 231 and a support airbag 232. A hole is provided on the side of the support sheath body 231, and the support airbag 232 is fixed at the hole.

In this embodiment, the working part sheath 21 is made of cylindrical hard polymer material, and has a limiting groove 211 on the inside that fits with the outside of the propulsion system 12 to limit the tool holder 113 from sliding forward and backward without rolling itself. The auxiliary tool holder 113 And the drill bit 11 advances and retreats stably.

Optionally, the guide sheath 22 is made of cylindrical soft polymer material, the front end is closely connected with the working part sheath 21, has excellent deflection and pitch characteristics, and has certain anti-roll characteristics; the sheath tube contains a number of guide wires 222, passing through Pulling the guide wire 222 on one side deflects the overall direction of the working part 1 toward the corresponding direction of the guide wire 222, and the degree of deflection is determined by the degree of pulling of the guide wire 222.

It should be noted that the support sheath 23 in this embodiment is made of cylindrical polymer material and contains a hole opening on the side. The support air bag 232 is connected to, but is not limited to, an air pump and a water pump. The support air bag 232 can be used by gas or liquid. Injected and stretched to support and secure the device within the lumen.

In one embodiment of the present invention, a sensor is further provided on the front of the working part sheath 21 . Sensors include but are not limited to ultrasonic probes, photosensitive CMOS/CCD, OCT and other components, which assist in determining the positioning of the instrument head.

The working process of the present invention is as follows:

1) The excavation device and the following equipment are sterilized using ethylene oxide and other methods to prepare the contrast agent;

2). The guidewire guide outer sheath is placed proximal to the target lesion. Under the protection of the outer sheath 2, the working part 1 enters the target artery lumen through the femoral artery, touches the plaque, and passes the guide sheath 22 to the front end of the working part 1. The device is gradually advanced to the location of the arterial occlusion plaque, where the contrast agent is injected through the fluid supply pipe 131 for imaging and to identify the target lesion location. Optionally, it can also display the location and shape of the lesion in combination with the position information provided by the front-end sensor;

3) Start the inflatable/fluid-filled support air bag 232 to relatively fix the position of the guide sheath 22 of the excavation device, while blocking the proximal blood flow and preventing distal artery embolism caused by debris falling off during plaque rotation;

4) According to the acquired plaque position and blood vessel morphology information, by controlling the pulling guide wire 222, adjust the advancement direction of the working part 1, and rotate the entire device around the central axis to achieve the ideal opening orientation of the excavation drill bit 11;

5) Excavation action: The following components are started simultaneously: (1) The first power source is started, driving the cutter head 111 to rotate through the transmission rod 112 to reach the working speed; (2) The second power source is started, and the gear set is driven through the transmission sleeve 123 122, and then push the cutter head 111 forward; (3) the water supply pump is started, and the water supply pump drives the physiological saline and other medical liquids required for surgery to be infused into the cavity; (4) the suction water pump is started, and the suction water pump absorbs water , generate negative pressure to aspirate the infused liquid and plaque fragments cut by the blade out of the blood vessel;

6). The first power source is turned off, the second power source is reversed, and the propulsion system 12 returns to its original position. The operator or related instruments then drive the device and deliver it forward along the entire excavated plaque space.

7) Continue steps 3 to 6 to completely suck out the debris in the lumen;

8) Use sensors and imaging to determine whether the blood vessel opening effect is satisfactory;

9) Exhaust air/liquid to dry up the supporting air bag 232 and fix the device to facilitate subsequent movement;

10) Remove the device along the arterial lumen, seal the puncture point to stop bleeding, and bandage the puncture point with pressure.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present invention, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

Claims (9)

1. An adjustable tunneling device for opening an arterial occlusion, comprising:

the working part comprises a drill bit, a propulsion system and a pipeline, wherein the drill bit is used for cutting the rotational atherectomy plaque to open an artery when rotating, the propulsion system is used for driving the drill bit to propel the uniform rotational atherectomy plaque, and the pipeline is used for providing medicines for the drill bit and sucking plaque fragments;

the outer sheath is coated on the outer side of the working part, the outer sheath can adjust the propelling direction of the working part, and the outer sheath is also used for supporting and fixing the working part.

2. An arterial occlusive adjustable heading device as claimed in claim 1 wherein said drill bit comprises:

a cutter head, the front surface of which is smooth, and the rear surface of which is roughened for spin-grinding;

one end of the transmission rod is connected with the cutter head, the other end of the transmission rod is connected with a first power source, and the first power source can drive the cutter head to rotate through the transmission rod;

the left side and the right side of the inside of the tool apron are respectively provided with a plurality of rack grooves, the rack grooves are matched with the propulsion system, the tool bit is movably clamped on the end face of the tool apron, and the transmission rod movably penetrates through the center position of the tool apron.

3. An arterial occlusive adjustable directional tunneling apparatus according to claim 2, wherein said transmission rod is comprised of a plurality of wires having a bending flexibility and said transmission rod is rigid for pivoting.

4. The tunneling device capable of opening arterial occlusion according to claim 3 wherein first through third preformed holes are formed in the cutter holder, the first preformed hole is located at the center of the cutter holder, an embedded groove is formed in the first preformed hole, an outwards protruding flange is arranged on the transmission rod and is clamped in the embedded groove, and the second preformed hole and the third preformed hole are connected with the pipeline.

5. An arterial occlusive adjustable heading device as claimed in claim 4 wherein the propulsion system comprises:

a gear base;

the gear set is arranged in the gear base and comprises a right first gear, a right second gear, a central gear, a left second gear and a left first gear which are sequentially meshed, wherein the right first gear and the left first gear are provided with worms, and the worms are meshed with the rack grooves;

the transmission sleeve is characterized in that one end of the transmission sleeve is connected with the central gear, the other end of the transmission sleeve is connected with a second power source, and the transmission sleeve is sleeved on the outer side of the transmission rod.

6. An open arterial occlusive adjustable heading device as claimed in claim 4 or claim 5 wherein said conduit comprises:

the liquid feeding pipeline is fixed in the second preformed hole, and one end of the liquid feeding pipeline is connected with a liquid feeding water pump;

the liquid suction pipeline is fixed in the third preformed hole, and one end of the liquid suction pipeline is connected with the liquid suction pump.

7. The tunneling apparatus of claim 6, wherein the fluid supply conduit and the fluid suction conduit are flexible polymeric conduits.

8. An arterial occlusive adjustable heading device as claimed in claim 6 wherein said outer sheath comprises:

the working part sheath is internally provided with a limit groove along the length direction, the outer surface of the tool apron is provided with a limit convex strip along the length direction, and the limit convex strip is matched with the limit groove;

the front end of the guide sheath is connected with the working part sheath, a plurality of penetrating wire passing holes are formed in the inner circumference of the guide sheath, guide wires are penetrated in the wire passing holes, one ends of the guide wires are fixed at the joint of the guide sheath and the working part sheath, the other ends of the guide wires extend out of the guide sheath, and the guide wires can adjust the deflection direction of the working part;

the support sheath comprises a support sheath body and a support air bag, a hole groove is formed in the side face of the support sheath body, and the support air bag is fixed at the hole groove.

9. An arterial occlusive adjustable tunneling apparatus according to claim 8 wherein a sensor is also provided at the front of said working sheath.