An interventional device for medical imaging

Abstract

The application discloses an interventional device for medical imaging and relates to the technical field of medical devices, which comprises a blood vessel sheath, a guide wire and an auxiliary controller, the auxiliary controller comprises a fixed cylinder and a movable sleeve, the movable sleeve is movably sleeved outside the fixed cylinder, one end of the movable sleeve is fixedly connected with a diameter expansion control wheel, an inner guide cylinder is arranged in the diameter expansion control wheel, the inner guide cylinder is connected with the diameter expansion control wheel through a transmission connection structure, the rotating speed of the inner guide cylinder is less than or equal to the rotating speed of the movable sleeve, and a compression control assembly is further arranged in the inner guide cylinder. In actual operation, a doctor only needs to control the rotation of the diameter expansion control wheel to control the rotation of the guide wire, in the case that the same distance is rubbed by fingers, the rotating amplitude of the diameter expansion control wheel is smaller, the guide wire is subjected to speed reduction transmission, the guide wire is more convenient to control at a low rotating speed, the control precision of the guide wire is improved, and the generation of risks is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to an interventional device for medical imaging. Background Technology

[0002] In the medical field, image-guided interventional therapy is a treatment plan that uses real-time medical images as its core to perform precise and minimally invasive treatments. It mainly involves inserting specialized catheters, guidewires, puncture needles, and other precision instruments into the human body under the real-time monitoring of medical images such as X-rays, CT scans, ultrasound, and MRI, and using a collection of high-tech minimally invasive tools to directly diagnose and treat lesions.

[0003] In the actual use of interventional devices, the main steps include puncture, guidewire insertion, insertion of vascular sheath, catheter insertion (used in conjunction with the guidewire), reaching the lesion for treatment, withdrawal of the device, and hemostasis. Among these, the most critical step is controlling the guidewire or catheter to move slowly towards the lesion in the blood vessel. During this process, it is necessary to use medical imaging guidance equipment (such as DSA, ultrasound, etc.) to generate fluoroscopic images, observe the movement of the guidewire / catheter under fluoroscopy, and when encountering a bifurcation, rotate the guidewire / catheter to turn its curved head to the correct blood vessel to continue its advance.

[0004] In this process, the guidewire acts as a guide. Typically, the guidewire is first pushed to the corresponding position, and then the corresponding therapeutic instrument or other auxiliary device is replaced along the guidewire. For example, the guidewire is first sent to the corresponding position, and then the catheter (also called a long sheath) is placed over the guidewire and gradually inserted along the guidewire (or the guidewire can be inserted while the catheter is being pushed forward). Then the guidewire is withdrawn, and the final therapeutic instrument is inserted along the catheter, etc. (Different diseases require different specific treatment plans and final therapeutic instruments, which will not be listed here.)

[0005] In some special treatment scenarios, such as coronary artery intervention and neurovascular intervention, thinner guidewires are required. When advancing the guidewire, it is necessary to concentrate and slowly push and twist it to ensure the stable advancement of the guidewire and ensure the safety of the operation. Therefore, doctors need to operate relatively smoothly.

[0006] Because the guidewire is thin, when encountering bifurcation and needing to rotate it to adjust the path, especially in complex situations requiring precise operation, the manual operation skills of the doctor are extremely demanding. Rotating the guidewire mainly relies on the doctor's fingers twisting the guidewire, using rolling friction to convert the movement of the fingers into rotation of the guidewire. The thinner the guidewire, the greater the transmission ratio between the finger and the guidewire. In other words, with the same finger twisting distance, a thinner guidewire will rotate more times. This means that in actual operation, the guidewire can easily rotate too much and miss the correct position, requiring the doctor to make repeated adjustments, which not only reduces treatment efficiency but also increases operational risks. Summary of the Invention

[0007] The present invention provides an interventional device for medical imaging, which aims to solve the problem that when the guidewire diameter is small, the guidewire is prone to excessive rotation and misses the correct position when the movement of the finger is converted into the rotation of the guidewire by means of rolling friction.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an interventional device for medical imaging, comprising an indwelling vascular sheath, a guidewire, and an auxiliary controller. The auxiliary controller comprises a fixed sleeve and a movable sleeve. The movable sleeve is movably fitted outside the fixed sleeve. One end of the movable sleeve is fixedly connected to a diameter-expanding control wheel. An inner guide tube is provided inside the diameter-expanding control wheel. The inner guide tube and the fixed sleeve are provided with a passage channel for the guidewire to pass through.

[0009] The inner guide cylinder is connected to the expansion control wheel through a transmission connection structure. When the expansion control wheel rotates, it drives the inner guide cylinder to rotate. The rotation speed of the inner guide cylinder is less than or equal to the rotation speed of the movable sleeve. The inner guide cylinder is also equipped with a clamping control component. The clamping control component fixes the guide wire by increasing the resistance with the guide wire.

[0010] Preferably, the clamping control assembly includes a first clamping assembly, which includes an inner conical sleeve and a pressure block. The pressure block is slidably installed radially in the inner guide cylinder, and the inner conical sleeve is slidably installed axially on the outer side of the end of the inner guide cylinder. The inner side of the inner conical sleeve near the end of the expansion control wheel is provided with a conical surface, which is adapted to the pressure block. The pressure block has an elastic force that slides outward. The outer wall of the inner conical sleeve slides in contact with the inner wall of the fixed cylinder, and a damping is provided between the outer wall of the inner conical sleeve and the inner wall of the fixed cylinder.

[0011] Preferably, a first elastic sleeve is installed inside the inner guide tube at the position corresponding to the pressure block. The first elastic sleeve is a rubber structure and can be detachably installed inside the inner guide tube. The inner diameter of the first elastic sleeve is larger than the outer diameter of the guide wire, and the first elastic sleeve provides elastic force to the pressure block.

[0012] Preferably, the clamping control assembly further includes a second clamping assembly, which includes multiple strip-shaped airbags. The multiple strip-shaped airbags are evenly arranged on the side wall of the expanding diameter control wheel along the circumferential direction. The inner guide tube has a cavity, and a second elastic sleeve is provided in the cavity. The second elastic sleeve forms a seal to the cavity. The inner diameter of the second elastic sleeve is larger than the outer diameter of the guide wire. The cavity is connected to the inner cavity of the strip-shaped airbags through a connecting channel.

[0013] Preferably, the second pressing assembly further includes a pressure regulating piston cylinder, which is connected to the communicating channel. A pressure regulating piston is slidably installed inside the pressure regulating piston cylinder, and an adjusting screw is provided on the pressure regulating piston. The adjusting screw is threadedly connected to the pressure regulating piston cylinder. The air pressure in the strip-shaped airbag and the cavity is adjusted by rotating the adjusting screw to adjust the position of the pressure regulating piston in the pressure regulating piston cylinder.

[0014] Preferably, the transmission connection structure includes a directional slide and a reduction gear assembly. The rotational speed of the inner guide cylinder is less than or equal to the rotational speed of the movable sleeve. The directional slide is slidably inserted into the inside of the fixed cylinder. A guide structure is provided between the directional slide and the fixed cylinder to limit the rotation of the directional slide. The inner guide cylinder is rotatably installed inside the directional slide. A mounting ring plate is fixedly connected to one end of the directional slide corresponding to the diameter expansion control wheel. The mounting ring plate is rotatably installed inside the diameter expansion control wheel. The diameter expansion control wheel and the inner guide cylinder are connected by a reduction gear assembly.

[0015] Preferably, the reduction assembly is a reduction gear set, in which each corresponding gear structure is rotatably mounted on the mounting ring plate, an internal gear ring is fixedly connected inside the expansion control wheel, an external gear ring is fixedly connected on the inner guide cylinder, and the internal gear ring and the external gear ring are connected by a reduction gear set.

[0016] Preferably, a supplementary block is fixedly connected to the outside of the inner guide cylinder. The supplementary block rotates and cooperates with the inner wall of the expansion control wheel and is relatively sealed. The supplementary block is provided with annular grooves at the positions of each strip-shaped airbag. The strip-shaped airbags are connected to the annular grooves. The supplementary block is also provided with a connecting hole inside. The connecting hole is connected to the annular groove and the second elastic sleeve. The annular groove and the connecting hole together form a connecting channel. The pressure regulating piston cylinder and the pressure regulating piston are provided on the supplementary block.

[0017] Preferably, the length of the fixed sleeve is greater than the length of the movable sleeve. The fixed sleeve forms a suspension area for suspending the guide wire. The fixed sleeve is also provided with a deflection assembly, which includes a follower slip ring and an eccentric cylinder. The follower slip ring is slidably installed in the fixed sleeve. The eccentric cylinder is connected to the follower slip ring by an elastic rope. The axis of the eccentric cylinder is offset from the axis of the follower slip ring. When the guide wire passes through the eccentric cylinder and contacts the eccentric cylinder, the contact part is offset from the axis of the fixed sleeve.

[0018] Preferably, the interventional device further includes a support assembly, which includes a mounting plate mounted on a control arm. The control arm is used to adjust and support the position of the mounting plate. A fixed seat is fixedly connected to the mounting plate. A mounting docking part is provided at the end of the fixed cylinder away from the diameter expansion control wheel. The fixed seat is used to fixably connect to the mounting docking part. A slide block is slidably mounted on the support assembly. A movable sleeve is rotatably mounted on the slide block. A movement controller for controlling the movement of the fixed seat is provided on the support assembly. A rotation controller for controlling the rotation of the diameter expansion control wheel is provided on the slide block.

[0019] The beneficial effects of this invention are as follows:

[0020] In actual operation, the doctor only needs to control the rotation of the expansion control wheel to manipulate the guidewire. The diameter of the expansion control wheel is relatively large. When rubbing the guidewire with the finger for the same distance, directly rubbing the expansion control wheel results in a smaller rotation amplitude, which creates a deceleration transmission for the guidewire. This makes it easier to control the guidewire at low speed, improves the control accuracy of the guidewire, and reduces the risk of accidents.

[0021] This invention creates a suspended area inside the fixed cylinder, where the guidewire has a certain amount of room to move. If the guidewire's advance is obstructed, it can bend and deform in this suspended area. If the guidewire continues to be pushed a small distance after being obstructed due to feedback time or other reasons, the bending and deformation of the guidewire in this suspended area can help prevent further advance of the guidewire head and avoid damage, thereby further improving safety. Attached Figure Description

[0022] Figure 1 This is a state diagram of the auxiliary controller of the present invention when used in conjunction with an indwelling vascular sheath;

[0023] Figure 2 This is a schematic diagram of the internal structure of the auxiliary controller of the present invention;

[0024] Figure 3 This is a state diagram of the first clamping assembly of the present invention clamping the guide wire and controlling the guide wire's forward movement;

[0025] Figure 4 This is a schematic diagram of the structure of the second clamping component of the present invention;

[0026] Figure 5 This is a schematic diagram of the improved auxiliary controller according to the present invention;

[0027] Figure 6 A schematic diagram of the deceleration assembly added between the expansion control wheel and the inner guide cylinder of the present invention;

[0028] Figure 7 This is an example diagram showing the distribution of the reduction gear set of the present invention;

[0029] Figure 8 This is a schematic diagram of the improved bending component of the present invention;

[0030] Figure 9 This is a schematic diagram showing the relative position of the eccentric cylinder in the support slip ring of the present invention;

[0031] Figure 10 This is a state diagram of the auxiliary controller of the present invention when used in conjunction with the support components;

[0032] Figure 11 This is a schematic diagram of the auxiliary controller of the present invention being used in conjunction with the control arm;

[0033] Figure 12 This is a schematic diagram illustrating the automatic control of the guidewire and catheter using two sets of auxiliary controllers, respectively, according to the present invention.

[0034] Figure 13 This is a schematic diagram of the structure of the present invention when a second clamping component and a mating tooth are simultaneously provided on the diameter expansion control wheel.

[0035] The attached figures are labeled as follows: 1. Indwelling vascular sheath; 2. Guidewire; 3. Auxiliary controller; 31. Fixing cylinder; 311. Mounting docking part; 32. Movable sleeve; 321. Inner guide cylinder; 322. Cavity; 323. Outer toothed ring; 33. Diameter expansion control wheel; 331. Inner toothed ring; 332. Mating tooth; 34. Directional slide; 341. Mounting ring plate; 342. Deceleration assembly; 35. Supplement block; 351. Ring groove; 352. Connecting hole; 4. Catheter; 5. Clamping control assembly; 51. First clamping assembly; 51 1. Inner conical sleeve; 512. Pressure block; 513. First elastic sleeve; 52. Second clamping assembly; 521. Strip-shaped airbag; 522. Second elastic sleeve; 523. Pressure regulating piston cylinder; 524. Pressure regulating piston; 6. Bending assembly; 61. Follow-up slip ring; 62. Eccentric cylinder; 63. Centering controller; 64. Elastic rope; 65. Pressure plate; 66. Pressure feedback device; 7. Support assembly; 71. Mounting plate; 72. Fixed seat; 73. Slide seat; 74. Rotation controller; 75. Movement controller; 8. Control arm. Detailed Implementation

[0036] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0037] Refer to the instruction manual appendix Figure 1 and Figure 12An interventional device for medical imaging includes an indwelling vascular sheath 1, a guidewire 2, an auxiliary controller 3, and a catheter 4. The indwelling vascular sheath 1 is inserted into the patient's blood vessel and temporarily fixed to the patient to establish an access channel. The guidewire 2 is used to pass through the indwelling vascular sheath 1 and advance within the blood vessel, thereby providing a track to guide subsequent instruments into the blood vessel and to their designated positions. In use, the guidewire 2 is slowly inserted into the blood vessel guided by the indwelling vascular sheath 1, and the entire process is advanced under DSA fluoroscopy. When encountering bifurcation, the guidewire 2 is rotated to adjust its direction. The catheter 4 serves as a guide... The guide and protection device is used to deliver therapeutic instruments, inject contrast agents, measure pressure, etc. In use, the part of the guidewire 2 outside the patient is first inserted into the catheter 4, and then inserted through the indwelling vascular sheath 1, so that the catheter 4 and the guidewire 2 advance one after the other (for cases with a short advance stroke, the guidewire 2 can be sent to the designated position first, and then the catheter 4 can be delivered to the corresponding position at one time) and pushed to the target blood vessel. After that, the guidewire 2 is withdrawn, and the position is confirmed by angiography. If treatment is required, the corresponding therapeutic instruments such as microcatheters, balloons or stents are then sent along the catheter 4.

[0038] In this embodiment, the indwelling vascular sheath 1 is inserted into the blood vessel after puncturing the skin and blood vessel wall, serving as an external access channel for subsequent instruments. The guidewire 2, catheter 4, and other instruments all enter the patient's body through the indwelling vascular sheath 1. After the indwelling vascular sheath 1 is fixed, the guidewire 2, catheter 4, and other instruments can be inserted into the blood vessel through the indwelling vascular sheath 1 according to specific needs. The specific structure and usage of the indwelling vascular sheath 1, guidewire 2, and catheter 4 are all routine equipment and procedures in interventional imaging therapy, and will not be explained in detail in this embodiment. The indwelling vascular sheath 1, guidewire 2, and catheter 4 mentioned above are also simple examples. Other equipment required for interventional medical imaging therapy will not be listed one by one in this invention.

[0039] Further, please refer to the appendix to the instruction manual. Figure 2 The auxiliary controller 3 includes a fixed sleeve 31 and a movable sleeve 32. The movable sleeve 32 is movably fitted outside the fixed sleeve 31 (the movable sleeve 32 can move and rotate relative to the fixed sleeve 31). One end of the movable sleeve 32 is fixedly connected to an expansion control wheel 33. An inner guide tube 321 is provided inside the expansion control wheel 33. The inside of the inner guide tube 321 is a through-passage channel, which allows the guide wire 2 to pass through (when adapted for use with other instruments, it can also allow other instruments, such as catheters 4, to pass through). The inner guide tube 321 is connected to the expansion control wheel 33 through a transmission connection structure. The diameter of the expansion control wheel 33 is larger than the outer diameter of the guide wire 2. When the expansion control wheel 33 rotates, it drives the inner guide tube 321 to rotate. The rotation speed of the inner guide tube 321 is less than or equal to the rotation speed of the movable sleeve 32. The inner guide tube 321 is also provided with a clamping control component 5 that fixes the guide wire 2 by increasing the resistance with the guide wire 2.

[0040] In addition, the end of the fixed cylinder 31 away from the expansion control wheel 33 is provided with a mounting docking part 311. The mounting docking part 311 is used to connect with other devices. For example, when the guide wire 2 is inserted, the mounting docking part 311 can be connected to the end of the indwelling vascular sheath 1. That is to say, the mounting docking part 311 can be provided with a docking structure that engages or fixes with the end of the indwelling vascular sheath 1 so that the fixed cylinder 31 and the indwelling vascular sheath 1 can be connected to facilitate operation close to the patient.

[0041] It should be noted that in the above scheme, the transmission connection structure between the inner guide tube 321 and the expansion control wheel 33 can directly adopt a simple proportional transmission component. For example, a connecting block can be used to directly connect the expansion control wheel 33 and the inner guide tube 321, or the expansion control wheel 33 and the inner guide tube 321 can be integrally molded. In this way, when the expansion control wheel 33 is manually rotated, the inner guide tube 321 and the guide wire 2 inside it can be rotated at the same speed. However, in actual operation, the doctor only needs to control the rotation of the expansion control wheel 33. Since the diameter of the expansion control wheel 33 is relatively large, when the finger is rubbed for the same distance, the rotation amplitude of the expansion control wheel 33 is smaller. This is equivalent to forming a deceleration transmission for the guide wire 2, making it easier to control the guide wire 2 at low speed, improving the control accuracy of the guide wire 2, and reducing the risk.

[0042] Regarding the clamping control component 5, in the above scheme, a rubber sleeve structure with an inner diameter smaller than the outer diameter of the guidewire 2 can be used. The rubber sleeve is fixed in the inner guide tube 321. During use, the guidewire 2 is passed through the rubber sleeve. Since the inner diameter of the rubber sleeve is smaller than the outer diameter of the guidewire 2, it can generate corresponding resistance to the guidewire 2, thereby fixing the guidewire 2. It should be noted that, in order to prevent blood leakage, a duckbill valve (made of medical silicone, which closes naturally, opens when the instrument passes through, and automatically seals after being pulled out) is usually installed in the indwelling vascular sheath 1 to form a seal with the instrument. This valve will also create resistance to the guidewire 2. Therefore, when using the rubber sleeve as the clamping control component 5, it is necessary to ensure that the resistance of the rubber sleeve to the guidewire 2 is greater than the resistance of the duckbill valve to the guidewire 2, so as to ensure the inner guide tube... The cylinder 321 can drive the guide wire 2 to rotate. When it is necessary to control the guide wire 2 to move forward, for long-distance unobstructed pushing, one can hold the fixed cylinder 31 with one hand and the guide wire 2 with the other hand to directly push it over the resistance of the rubber sleeve. When it is necessary to push it slowly over a short distance (for example, when encountering a fork and needing to adjust the direction of the bent head of the guide wire 2), one can hold the fixed cylinder 31 with one hand and the movable sleeve 32 with the other hand, and control the movable sleeve 32 to move relative to the fixed cylinder 31, which can also drive the guide wire 2 to move forward. When necessary, the guide wire 2 can be slowly adjusted to rotate. After adjustment, the guide wire 2 can be manually controlled to move forward directly, or the guide wire 2 can be pinched with one hand to fix it, and the movable sleeve 32 can be pulled outward with the other hand to control the movable sleeve 32 to drive the guide wire 2 to move slowly.

[0043] It should be noted that the above structure is relatively simple and low in cost, and can be processed into a disposable plastic product. Since the actual contact with the guidewire 2 is made of a rubber sleeve for the compression control component 5, the rubber sleeve can also be used as a disposable consumable. Other structures can be made of stainless steel or other easy-to-clean and disinfectable materials for reuse. However, during reuse, it is necessary to pay attention to thorough disinfection and pretreatment. Although the auxiliary controller 3 is designed for the guidewire 2, it can also be used to insert the catheter 4 or other instruments. It is only necessary to set the corresponding auxiliary controller 3 according to the different diameter instruments, or simply set the corresponding rubber sleeve, thereby reducing medical costs.

[0044] In the above scheme, although the structure is simple and the cost is low when a rubber sleeve is directly used as the clamping control component 5, there is more friction when it is inserted into the guide wire 2, and it is slightly inconvenient to use. Therefore, this embodiment also provides a clamping control component 5. For details, please refer to the appendix of the instruction manual. Figure 3The clamping control component 5 is a first clamping component 51. The first clamping component 51 is preferably located at the end of the inner guide cylinder 321 away from the diameter expansion control wheel 33, or it can be located in the middle of the inner guide cylinder 321, but locating it at the end facilitates assembly. Specifically, the first clamping component 51 includes an inner conical sleeve 511 and a pressure block 512. The pressure block 512 is radially slidably installed in the inner guide cylinder 321, and the inner conical sleeve 511 is axially slidably installed on the outer side of the end of the inner guide cylinder 321, close to the diameter expansion. A tapered surface is provided on the inner side of one end of the control wheel 33. This tapered surface is adapted to the pressure block 512. The pressure block 512 has an outward sliding elastic force. The outer wall of the inner tapered sleeve 511 slides in contact with the inner wall of the fixed cylinder 31, and a damping is provided between the outer wall of the inner tapered sleeve 511 and the inner wall of the fixed cylinder 31 (for example, a rubber layer is provided on the outside of the inner tapered sleeve 511). Initially, the inner tapered sleeve 511 is located on the side of the pressure block 512 away from the expanding diameter control wheel 33. In actual operation, it is necessary to control the guide wire 2. During advancement, the movable sleeve 32 can be pushed forward relative to the fixed sleeve 31. At this time, the inner conical sleeve 511 is pushed towards the outer end of the pressure block 512 by the reverse resistance of the fixed sleeve 31, and gradually squeezes the pressure block 512 with the help of the conical surface. After the pressure block 512 is squeezed inward, the guide wire 2 can be squeezed and fixed. This achieves the effect of automatically clamping and fixing the guide wire 2 by controlling the expansion control wheel 33 to advance. However, since the advancing range of the movable sleeve 32 is limited, continuous control of the guide wire 2's advance is required. During the process, the movable sleeve 32 can be controlled to retract first. When the movable sleeve 32 retracts, the inner conical sleeve 511 can be driven to exit from the outside of the pressure block 512 by the reverse resistance between the inner conical sleeve 511 and the fixed cylinder 31. The pressure block 512 can automatically spring back and reset. At this time, the guide wire 2 can be freely controlled. The guide wire 2 can be pushed directly by holding the guide wire 2. The movable sleeve 32 can also be controlled to move forward again, so that the first clamping component 51 can fix the guide wire 2 again to push the guide wire 2.

[0045] It should be noted that in the above solution, the pressure block 512 can be directly controlled to contact and fix the guide wire 2, but the protection of the guide wire 2 is lacking. Therefore, in this embodiment, a first elastic sleeve 513 is installed inside the inner guide tube 321 at the position corresponding to the pressure block 512. The first elastic sleeve 513 can be made of rubber and can be fixedly installed inside the inner guide tube 321. The inner diameter of the first elastic sleeve 513 is larger than the outer diameter of the guide wire 2. Therefore, it is relatively easy to insert the guide wire 2 into the inner guide tube 321, and the control... When the movable sleeve 32 moves forward, the pressure block 512 is squeezed by the inner conical sliding sleeve 511, which in turn squeezes the first elastic sleeve 513, thereby squeezing and fixing the guide wire 2. When the movable sleeve 32 moves backward, the first elastic sleeve 513 can also act as an elastic element, providing elastic force to the pressure block 512 and driving the pressure block 512 to reset. At the same time, since the first elastic sleeve 513 is in direct contact with the guide wire 2, other structures can be reused by replacing the first elastic sleeve 513.

[0046] In addition, this embodiment also provides another clamping control component 5, the details of which can be found in the appendix to the instruction manual. Figure 4 The clamping control component 5 is a second clamping component 52, which includes a strip-shaped airbag 521. The strip-shaped airbag 521 is mounted on the expansion control wheel 33. The inner guide cylinder 321 has a cavity 322 inside, and a second elastic sleeve 522 is disposed inside the cavity 322. The second elastic sleeve 522 seals the cavity 322. The inner diameter of the second elastic sleeve 522 is also larger than the outer diameter of the guide wire 2 (to facilitate the insertion of the guide wire 2). The cavity 322 is connected to the inner cavity of the strip-shaped airbag 521 through a connecting channel. For example, when the expansion control wheel... When the inner guide tube 321 is directly and integrally fixedly connected to the inner guide tube 321, the above-mentioned communication channel can be set in the fixed connecting block between the inner guide tube 321 and the expansion control wheel 33 to ensure direct communication between the strip airbag 521 and the cavity 322. In actual use, as needed, the corresponding strip airbag 521 can be pressed with a finger to increase the air pressure in the cavity 322, thereby causing the second elastic sleeve 522 to expand inward and pressurize the guide wire 2. Then, the guide wire 2 can be pushed and adjusted by controlling the expansion control wheel 33 to move or rotate.

[0047] Multiple strip-shaped airbags 521 can be provided, and the multiple strip-shaped airbags 521 are evenly arranged on the outer wall of the diameter expansion control wheel 33. In actual operation, the strip-shaped airbags 521 can be used to increase the comfort of rotating the diameter expansion control wheel 33. It can also ensure that during the rotation of the diameter expansion control wheel 33, there is always a finger that can press the corresponding strip-shaped airbag 521 to ensure that the second elastic sleeve 522 deforms inward and squeezes and fixes the guide wire 2.

[0048] In addition, the second clamping assembly 52 also includes a pressure regulating piston cylinder 523, which is connected to the aforementioned communication channel. A pressure regulating piston 524 is slidably installed inside the pressure regulating piston cylinder 523. The pressure regulating piston 524 is provided with an adjusting screw, which is threadedly connected to the pressure regulating piston cylinder 523. By rotating the adjusting screw, the specific position of the pressure regulating piston 524 in the pressure regulating piston cylinder 523 can be adjusted to regulate the air pressure in the strip-shaped airbag 521 and the cavity 322. For example, by initially increasing the air pressure, the guide wire 2 can be fixed simply by lightly pressing the strip-shaped airbag 521. When it is not needed, the pressure can be adjusted accordingly. When the strip-shaped airbag 521 is in use, the above-mentioned air pressure can be reduced. At this time, even if the strip-shaped airbag 521 is accidentally pressed, it will not form a tight pressure on the guide wire 2. When the diameter expansion control wheel 33 is fixedly connected to the inner guide cylinder 321, the pressure regulating piston cylinder 523 and the pressure regulating piston 524 can be directly set on the diameter expansion control wheel 33, or set on the connecting block between the diameter expansion control wheel 33 and the inner guide cylinder 321. When the diameter expansion control wheel 33 and the inner guide cylinder 321 are connected in other ways, the pressure regulating piston cylinder 523 and the pressure regulating piston 524 can also be set on the diameter expansion control wheel 33 or other structures according to the specific structure.

[0049] It should be noted that the first clamping component 51 and the second clamping component 52 are installed in different positions and have different fastening principles. One can be used at a time, or both can be used simultaneously, depending on the actual situation to ensure precise control of the guide wire 2. When the first clamping component 51 and the second clamping component 52 are used simultaneously, the first elastic sleeve 513 and the second elastic sleeve 522 can adopt an integrated flexible sleeve structure, such as the rubber sleeve mentioned earlier. However, unlike the rubber sleeve, the inner diameter of this flexible sleeve structure is larger than the outer diameter of the guide wire 2 to ensure smooth passage of the guide wire 2. This flexible sleeve structure can be detachably installed in the inner guide tube. In section 321, the inner guide tube 321 can be replaced. For example, the flexible sleeve structure can be directly inserted into the inner guide tube 321. The outer diameter of the flexible sleeve structure is larger than the inner diameter of the inner guide tube 321, so that during installation, the flexible sleeve structure can form a tight press with the inner guide tube 321. This serves two purposes: firstly, it fixes the flexible sleeve structure to the inner guide tube 321, and secondly, it ensures the relative sealing of the cavity 322. If necessary, auxiliary structures can be used to further fix the flexible sleeve structure, or adhesive bonding can be used to bond part of the structure. When replacement is required, the flexible sleeve structure can be forcibly removed.

[0050] In the above scheme, when the expansion control wheel 33 is directly fixedly connected to the inner guide cylinder 321, the rotation control of the guide wire 2 can be slowed down by appropriately increasing the diameter of the expansion control wheel 33. That is, the rotation speed of the guide wire 2 is less than the rotation speed of the expansion control wheel 33 (i.e., when the finger movement speed is the same during hand rubbing, that is, when the linear velocity is the same, the larger the diameter of the expansion control wheel 33, the slower its angular velocity, which means the slower the rotation control of the guide wire 2). However, excessively pursuing a large diameter of the expansion control wheel 33 will also make the expansion control wheel 33 difficult to hold and operate. Therefore, in addition to the scheme of fixedly connecting the expansion control wheel 33 and the inner guide cylinder 321, this embodiment also improves the auxiliary controller 3. For details, please refer to the appendix of the instruction manual. Figure 5 The aforementioned transmission connection structure can also utilize the combination of a directional slide cylinder 34 and a reduction gear assembly 342. For example, the directional slide cylinder 34 is slidably inserted into the interior of the fixed cylinder 31, and a guide structure (such as a spline structure or a guide bar structure) is provided between the directional slide cylinder 34 and the fixed cylinder 31. This guide structure is used to restrict the rotation of the directional slide cylinder 34. The inner guide cylinder 321 is rotatably installed inside the directional slide cylinder 34, and a mounting ring plate 341 is fixedly connected to one end of the directional slide cylinder 34 corresponding to the diameter expansion control wheel 33. The mounting ring plate 341 is rotatably installed inside the diameter expansion control wheel 33, thereby separating the diameter expansion control wheel 33 and the inner guide cylinder 321 into relatively independent structures. The diameter expansion control wheel 33 and the inner guide cylinder 321 are connected by a reduction gear assembly 342, thereby enabling the diameter expansion control wheel 33 to drive the rotation of the guide wire 2, forming a reduction transmission. The reduction gear assembly 342 can be a reduction gear set, see the attached manual. Figure 6 and Figure 7 Each gear structure in the reduction gear set is rotatably mounted on the mounting ring plate 341. An internal gear ring 331 is fixedly connected inside the expansion control wheel 33, and an external gear ring 323 is fixedly connected on the inner guide cylinder 321. The internal gear ring 331 and the external gear ring 323 are connected by a reduction gear set, so that when the expansion control wheel 33 is rotated, the guide wire 2 can be rotated more slowly.

[0051] It should be noted that the aforementioned reduction gear set is a conventional structure in the field of speed reduction transmission. The actual transmission ratio setting and the size setting of each gear are existing technologies. Therefore, this embodiment will not elaborate further. Since the inner guide cylinder 321 and the expanding diameter control wheel 33 are separate structures in this scheme, appropriate adjustments are required when using the second clamping assembly 52. ​​For example, a supplementary block 35 is fixedly connected to the outside of the inner guide cylinder 321. The supplementary block 35 rotates and engages with the inner wall of the expanding diameter control wheel 33, and is relatively sealed. The supplementary block 35 has annular grooves 3 at the positions corresponding to each strip-shaped airbag 521. 51. The strip-shaped airbag 521 is interconnected with the annular groove 351. The supplementary block 35 also has a connecting hole 352 inside, which is connected to the annular groove 351 and the second elastic sleeve 522. The annular groove 351 and the connecting hole 352 together form the above-mentioned connecting channel, thereby ensuring effective control of the second pressing component 52 without affecting the differential rotation of the inner guide cylinder 321 and the expansion control wheel 33. As for the design of the pressure regulating piston cylinder 523 and the pressure regulating piston 524, they can be directly set on the expansion control wheel 33 in an unobstructed place, or they can be set on the supplementary block 35 (see attached manual). Figure 5 and attached Figure 6 Although not shown, this does not preclude those skilled in the art from making reasonable settings based on actual circumstances.

[0052] In the above scheme, due to operational errors during actual operation, there are instances where the guidewire 2 is obstructed. In such cases, it is necessary to combine fluoroscopic imaging with medical imaging guidance equipment and the perception of the obstruction of the guidewire 2 to stop pushing the guidewire 2 in time to avoid the guidewire 2 puncturing or damaging the blood vessel. However, due to the limited perception and judgment ability of the operator, as well as the influence of many factors in the actual operation, in routine operation, there is still a long feedback time after obstruction (that is, the guidewire 2 will still advance a certain distance after obstruction), which may lead to damage to the blood vessel and pose a relatively high risk.

[0053] Because this invention employs a combination of a movable sleeve 32 and a fixed sleeve 31, when the expansion control wheel 33 is not advancing, the interior of the fixed sleeve 31 is mainly hollow, creating a suspended area for the guide wire 2. Furthermore, the length of the fixed sleeve 31 can be set to be greater than the length of the movable sleeve 32 to ensure that the fixed sleeve 31 always has a suspended area, providing the guide wire 2 with a certain amount of room to move. In other words, during actual use, if the guide wire 2's advance is obstructed, it can undergo a certain degree of bending deformation in this suspended area. If the guide wire 2 continues to be pushed a small distance after being obstructed due to feedback time or other reasons, the bending deformation of the guide wire 2 in this suspended area can prevent further advancement of the guide wire 2's head. Then, based on the specific judgment of the fluoroscopic image, subsequent processing can be performed, thereby further improving safety.

[0054] Since the guide wire 2 itself has a certain rigidity, it is not easy to bend when it is in a straight state and subjected to only axial force. Therefore, this embodiment also provides the following solution, for details please refer to the appendix of the instruction manual. Figure 5 and Figure 8 The fixed cylinder 31 is also equipped with a bending component 6. The bending component 6 includes a follower slip ring 61 and an eccentric cylinder 62. The follower slip ring 61 is slidably installed in the fixed cylinder 31. The eccentric cylinder 62 is connected to the follower slip ring 61 by an elastic rope 64. The axis of the eccentric cylinder 62 is offset from the axis of the follower slip ring 61. When the guide wire 2 passes through the eccentric cylinder 62 and comes into contact with the eccentric cylinder 62, the contact part is offset from the axis of the fixed cylinder 31. That is to say, after the guide wire 2 passes through the eccentric cylinder 62 and exits the fixed cylinder 31, a slight bend can be formed at the eccentric cylinder 62. Therefore, in the event of an accident, the guide wire 2 is more likely to bend and deform at this point.

[0055] Furthermore, since the movable sleeve 32 needs to move forward during use, the bending assembly 6 cannot be in a fixed position. Therefore, please refer to the attached instruction manual. Figure 5 Both ends of the follower slip ring 61 are equipped with a centering controller 63. The two sets of centering controllers 63 are in contact with the fixed cylinder 31 and the inner guide cylinder 321 respectively. The two sets of centering controllers 63 have the same structure, material, length and other parameters. Thus, when the movable sleeve 32 moves forward, the same elastic force of the two sets of centering controllers 63 can keep the follower slip ring 61 in the middle of the suspended part of the guide wire 2.

[0056] It should be noted that the interior of the eccentric cylinder 62 can be configured as a funnel shape to facilitate the passage of the guide wire 2. At the same time, the end of the fixed cylinder 31, which is the position where the guide wire 2 passes through, can also be configured as a funnel shape to guide the output of the guide wire 2. Replaceable protective structures, such as rubber layers, can be provided at the positions of the eccentric cylinder 62 and the fixed cylinder 31 that correspond to the contact positions with the guide wire 2 to effectively protect the guide wire 2 and facilitate the reuse of other structures.

[0057] Furthermore, to improve the sensing of obstruction in the advance of guidewire 2, this embodiment also provides the following solutions, specifically referring to the appendix to the instruction manual. Figure 8 and Figure 9Multiple sets of elastic ropes 64 are arranged around the eccentric cylinder 62. Each elastic rope 64 passes through the follower slip ring 61 and is connected to a pressure plate 65. A pressure feedback device 66 is arranged between the pressure plate 65 and the follower slip ring 61. The pressure feedback device 66 can adopt a low-cost electrical contact point structure, and a warning light is installed on the fixed cylinder 31. The aforementioned electrical contact point structure is used to control the on or off of the warning light. When the pressure plate 65 presses the pressure feedback device 66, it controls the warning light to turn on. In addition, the pressure feedback device 66 can also directly adopt components such as pressure sensors, and its pressure parameters can be connected to medical... The system incorporates a corresponding prompting unit. In actual use, if the overall state of guidewire 2 is stable, the pressure of each pressure pad 65 and pressure feedback device 66 will also be relatively stable when guidewire 2 forms a reaction force on eccentric cylinder 62, and the identification parameters of the pressure sensors will also be relatively stable. When an accident occurs, such as when guidewire 2 is obstructed from advancing or when guidewire 2 is excessively bent, the relative force between guidewire 2 and eccentric cylinder 62 will also change, and the identification pressure of each pressure sensor will also change. Therefore, the occurrence of an accident can be detected as early as possible, prompting the doctor to stop the operation in time.

[0058] It should be noted that the above solution is only a direct way to determine whether the advance of the guide wire 2 is blocked, provided by this embodiment. Its core is to identify whether the guide wire 2 has been unexpectedly deformed in order to determine whether the advance of the guide wire 2 is blocked. Based on this core principle, other corresponding solutions can also be used. Therefore, this embodiment will not explain the above solution in too much detail, nor will it list other solutions one by one.

[0059] In the above scheme, the auxiliary controller 3 can be directly connected to the indwelling vascular sheath 1. However, since the indwelling vascular sheath 1 is fixed to the human body, the stability is not good. Therefore, a corresponding support structure can also be set to fix and support the auxiliary controller 3. Refer to the attached instruction manual. Figure 10 For example, the intervention device also includes a support assembly 7, which includes a mounting plate 71. A fixing seat 72 is fixedly connected to the mounting plate 71. The fixing seat 72 is used to fixally connect to the mounting docking part 311. A slide block 73 is slidably mounted on the support assembly 7. The movable sleeve 32 is rotatably mounted on the slide block 73 and moves with the fixing seat 72. In use, the mounting plate 71 can be installed in the corresponding position to support the auxiliary controller 3.

[0060] Furthermore, based on the above-mentioned solution, only simple modifications are needed to create a semi-automatic interventional control and treatment device. For example, refer to the instruction manual attached... Figure 11The support assembly 7 is equipped with a motion controller 75 for controlling the movement of the fixed base 72, and the slide 73 is equipped with a rotation controller 74 for controlling the rotation of the diameter expansion control wheel 33. For example, the motion controller 75 adopts a high-precision linear motor structure, while the rotation controller 74 adopts a combination of a rotation motor and a transmission gear. A mating tooth 332 is also provided on the outside of the diameter expansion control wheel 33 so that it meshes with the transmission gear, thereby forming a rotation drive for the diameter expansion control wheel 33.

[0061] It should be noted that the above solution is suitable for situations where the pushing distance is large and the overall treatment time is long. The controllers for the movement controller 75 and rotation controller 74 are set up in an area far from the medical imaging guidance equipment. After the guidewire 2 is inserted, the doctor moves away from the medical imaging guidance equipment and manipulates the equipment to perform interventional treatment based on the fluoroscopic image. This avoids the doctor being near the medical imaging guidance equipment for extended periods, reducing harm to the doctor. Compared to a fully automated operating system based on transmission, the core of this invention uses the auxiliary controller 3 as a transfer operation medium. During the process, the auxiliary controller 3 and its internal pressing control component 5 contact the guidewire 2, eliminating the need for the automated equipment to directly contact the guidewire 2. Compared to the traditional method of squeezing and pushing the guidewire 2 with rollers, the presence of the auxiliary controller 3 in this invention makes automatic pushing safer and more convenient, and less likely to damage the guidewire 2, resulting in better safety.

[0062] Furthermore, although the present invention uses guidewire 2 as an example, the above-mentioned auxiliary controller 3 is not limited to adapting to guidewire 2. Since guidewire 2 is not required in some treatment processes, catheter 4 is used directly for pushing and subsequent treatment, the above-mentioned auxiliary controller 3 can also be set to adapt to catheter 4. Only the diameter of the necessary structure needs to be redesigned. Therefore, the explanation of the adaptation between guidewire 2 and auxiliary controller 3 above is equivalent to the explanation of the adaptation between catheter 4 and auxiliary controller 3. This embodiment will not go into too much detail.

[0063] Based on the above solution, when multiple instruments need to use the auxiliary controller 3 simultaneously, multiple sets of auxiliary controllers 3 can be set up, and control arms 8 can be set up to support the corresponding mounting plates 71. The control arms 8 are used to adjust and support the position of the mounting plates 71, thereby facilitating the adjustment of the relative positions of each instrument. For details, please refer to the appendix of the instruction manual. Figure 11 and Figure 12 Regarding the control arm 8, a multi-degree-of-freedom manual control structure (such as various movable supports) or an automated robotic arm structure can be adopted, depending on the cost. Furthermore, when the auxiliary controller 3 needs to be able to operate both manually and automatically, a mating tooth 332 and a strip-shaped airbag 521 can be installed on the outside of the expanded diameter control wheel 33. Their specific positions can be adjusted accordingly, for example, as shown in the appendix to the instruction manual. Figure 13Distribution settings.

[0064] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An interventional device for medical imaging, comprising an indwelling vascular sheath (1), a guidewire (2), and an auxiliary controller (3), characterized in that: The auxiliary controller (3) includes a fixed sleeve (31) and a movable sleeve (32). The movable sleeve (32) is movably fitted outside the fixed sleeve (31). One end of the movable sleeve (32) is fixedly connected to an expansion control wheel (33). An inner guide cylinder (321) is provided inside the expansion control wheel (33). The inner guide cylinder (321) and the fixed sleeve (31) are provided with a passage for the guide wire (2) to pass through. The inner guide cylinder (321) is connected to the expansion control wheel (33) through a transmission connection structure. When the expansion control wheel (33) rotates, it drives the inner guide cylinder (321) to rotate. The rotation speed of the inner guide cylinder (321) is less than or equal to the rotation speed of the movable sleeve (32). The inner guide cylinder (321) is also provided with a clamping control component (5). The clamping control component (5) fixes the guide wire (2) by increasing the resistance with the guide wire (2). The clamping control assembly (5) includes a first clamping assembly (51), which includes an inner conical sleeve (511) and a pressure block (512). The pressure block (512) is radially slidably installed in the inner guide cylinder (321), and the inner conical sleeve (511) is axially slidably installed on the outer side of the end of the inner guide cylinder (321). The inner side of the inner conical sleeve (511) near the end of the expansion control wheel (33) is provided with a conical surface, which is adapted to the pressure block (512). The pressure block (512) has an elastic force that slides outward. The outer wall of the inner conical sleeve (511) slides in contact with the inner wall of the fixed cylinder (31), and a damping is provided between the outer wall of the inner conical sleeve (511) and the inner wall of the fixed cylinder (31). The length of the fixed cylinder (31) is greater than the length of the movable sleeve (32). The fixed cylinder (31) forms a suspension area for suspending the guide wire (2). The fixed cylinder (31) is also provided with a deflection assembly (6). The deflection assembly (6) includes a follower slip ring (61) and an eccentric cylinder (62). The follower slip ring (61) is slidably installed in the fixed cylinder (31). The eccentric cylinder (62) is connected to the follower slip ring (61) by an elastic rope (64). The axis of the eccentric cylinder (62) is offset from the axis of the follower slip ring (61). When the guide wire (2) passes through the eccentric cylinder (62) and contacts the eccentric cylinder (62), the contact part is offset from the axis of the fixed cylinder (31).

2. The interventional device for medical imaging according to claim 1, characterized in that: The first elastic sleeve (513) is installed in the inner guide tube (321) at the position corresponding to the pressure block (512). The first elastic sleeve (513) is a rubber structure and can be detachably installed in the inner guide tube (321). The inner diameter of the first elastic sleeve (513) is larger than the outer diameter of the guide wire (2). The first elastic sleeve (513) provides elastic force to the pressure block (512).

3. The interventional device for medical imaging according to claim 2, characterized in that: The clamping control assembly (5) further includes a second clamping assembly (52), which includes multiple strip-shaped airbags (521). The multiple strip-shaped airbags (521) are evenly arranged on the side wall of the expansion control wheel (33) along the circumferential direction. The inner guide cylinder (321) is provided with a cavity (322). A second elastic sleeve (522) is provided in the cavity (322). The second elastic sleeve (522) forms a seal on the cavity (322). The inner diameter of the second elastic sleeve (522) is larger than the outer diameter of the guide wire (2). The cavity (322) is connected to the inner cavity of the strip-shaped airbag (521) through a connecting channel.

4. The interventional device for medical imaging according to claim 3, characterized in that: The second pressing assembly (52) also includes a pressure regulating piston cylinder (523), which is connected to the communication channel. A pressure regulating piston (524) is slidably installed inside the pressure regulating piston cylinder (523). An adjusting screw is provided on the pressure regulating piston (524), which is threadedly connected to the pressure regulating piston cylinder (523). The air pressure in the strip-shaped airbag (521) and the cavity (322) is adjusted by rotating the adjusting screw to adjust the position of the pressure regulating piston (524) in the pressure regulating piston cylinder (523).

5. The interventional device for medical imaging according to claim 4, characterized in that: The transmission connection structure includes a directional slide (34) and a deceleration assembly (342). The rotational speed of the inner guide cylinder (321) is less than that of the movable sleeve (32). The directional slide (34) is slidably inserted into the inside of the fixed cylinder (31). A guide structure is provided between the directional slide (34) and the fixed cylinder (31). This guide structure is used to restrict the rotation of the directional slide (34). The inner guide cylinder (321) is rotatably installed inside the directional slide (34). One end of the directional slide (34) corresponding to the diameter expansion control wheel (33) is fixedly connected to an installation ring plate (341). The installation ring plate (341) is rotatably installed inside the diameter expansion control wheel (33). The diameter expansion control wheel (33) and the inner guide cylinder (321) are connected by a transmission through the deceleration assembly (342).

6. The interventional device for medical imaging according to claim 5, characterized in that: The deceleration assembly (342) is a deceleration gear set. Each gear structure in the deceleration gear set is rotatably mounted on the mounting ring plate (341). An internal gear ring (331) is fixedly connected inside the expansion control wheel (33), and an external gear ring (323) is fixedly connected on the inner guide cylinder (321). The internal gear ring (331) and the external gear ring (323) are connected by a deceleration gear set.

7. The interventional device for medical imaging according to claim 6, characterized in that: The inner guide cylinder (321) is fixedly connected to a supplementary block (35). The supplementary block (35) rotates and cooperates with the inner wall of the expansion control wheel (33) and is relatively sealed. The supplementary block (35) is provided with annular grooves (351) at the positions corresponding to each strip-shaped airbag (521). The strip-shaped airbag (521) and the annular grooves (351) are interconnected. The supplementary block (35) is also provided with a connecting hole (352). The connecting hole (352) is connected to the annular groove (351) and the second elastic sleeve (522). The annular groove (351) and the connecting hole (352) together form a connecting channel. The pressure regulating piston cylinder (523) and the pressure regulating piston (524) are arranged on the supplementary block (35).

8. The interventional device for medical imaging according to claim 7, characterized in that: The intervention device also includes a support assembly (7), which includes a mounting plate (71) mounted on a control arm (8). The control arm (8) is used to adjust and support the position of the mounting plate (71). A fixed seat (72) is fixedly connected to the mounting plate (71). A mounting docking part (311) is provided at the end of the fixed cylinder (31) away from the expansion control wheel (33). The fixed seat (72) is used to be fixedly connected to the mounting docking part (311). A sliding block (73) is slidably mounted on the support assembly (7). The movable sleeve (32) is rotatably mounted on the sliding block (73). A movement controller (75) for controlling the movement of the fixed seat (72) is provided on the support assembly (7). A rotation controller (74) for controlling the rotation of the expansion control wheel (33) is provided on the sliding block (73).

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