Interventional ultrasonic annular array catheter and transducer annular array scaling mechanism

Abstract

The invention relates to an interventional ultrasonic annular array catheter which comprises an adjusting screw, a connecting sleeve and a connecting pipe. The front end of the connecting sleeve is connected with the connecting pipe, and the front end of the connecting pipe is provided with the probe; the probe comprises an inner tube, a transducer annular array scaling mechanism and a supporting tube, wherein the middle part of the inner tube is pressed and can contract inwards; the transducer annular array scaling mechanism consists of a plurality of pressing plates; transducers are fixedly arranged on the outer surfaces of the pressing plates; the transducer annular array scaling mechanism further comprises a wire concentration ring, a pull wire and a metal ring, the rear ends of the pressing plates are movably installed on the metal ring and distributed on the outer side of the inner pipe in a circumferential array mode, the rear ends of the pressing plates are fixedly installed at one end of the guide pin shaft at the same time, and the wire concentration ring is arranged at the other end of the guide pin shaft. The wire concentration ring is provided with a pull wire, and the pull wire drives the wire concentration ring to enable the pressing plate to rotate towards the inner side along the metal ring. The invention also comprises a transducer ring array scaling mechanism. The diameter of the probe is scalable, so that the probe can be conveniently adapted to blood vessels with different diameters, the operation is convenient, and the operation process is simplified.

Description

Technical Field

[0001] The invention belongs to the technical field of interventional catheters, and in particular relates to an interventional ultrasonic annular array catheter and a transducer annular array zoom mechanism. Background Art

[0002] In the field of peripheral vascular interventional therapy, especially in the treatment of chronic total occlusions (CTO), existing ultrasonic annular array catheters face many challenges. The primary problem is the mismatch between the diversity of their models and the complexity of vascular anatomy. Since each patient has significant differences in vascular diameter, course, and branching, especially the significant difference in vascular diameter between the above-popliteal artery and the below-popliteal artery, a single catheter model is difficult to meet diverse clinical needs. This not only increases the complexity and difficulty of surgical operations, but may also increase the risk of vascular damage due to inappropriate catheter size.

[0003] In addition, the currently commonly used circular array ultrasound probes have technical limitations and are unable to directly send and receive signals forward, which is particularly insufficient in the diagnosis of CTO lesions. CTO lesions usually involve complex plaque structures, including multiple components such as calcification, fibrosis, and lipid deposition. Accurate identification of plaque properties is crucial for formulating treatment plans. However, due to the limitations of existing probe design, doctors are unable to obtain real-time and intuitive information about the properties of the plaque in front of the lesion, which undoubtedly increases the uncertainty and potential risks of treatment.

[0004] Therefore, designing an advanced ultrasonic annular array catheter that can adapt to different blood vessel diameters and has the ability to send and receive forward signals is very important for the development of the field of peripheral vascular interventional treatment. Summary of the invention

[0005] In order to solve the technical problems existing in the known technology, the present invention provides an interventional ultrasound annular array catheter and a transducer annular array scaling mechanism, which can send and receive signals forward, diagnose the properties of plaques and provide effective reference for guidewire threading, thereby improving patient prognosis and reducing the incidence of complications.

[0006] The present invention includes the following technical solutions: an interventional ultrasound annular array catheter, comprising an adjustment screw, a connecting sleeve and a connecting tube; the adjustment screw is arranged at the rear of the connecting sleeve, the front end of the connecting sleeve is connected to the connecting tube, and a probe is installed at the front end of the connecting tube; the probe includes an inner tube whose middle part is pressurized and can shrink inward, a transducer annular array scaling mechanism composed of a plurality of pressure plates with transducers fixed on the outer surface, and a support tube; the transducer annular array scaling mechanism also includes a wire gathering ring, a pull wire and a metal ring fixed in the support tube, the rear end of the pressure plate is movably mounted on the metal ring and arranged in a circular array on the outside of the inner tube, the rear end of the pressure plate is also fixed on one end of a guide pin shaft, and a wire gathering ring is provided at the other end of the guide pin shaft; a pull wire is provided on the wire gathering ring, and the pull wire drives the wire gathering ring to make the pressure plate rotate inward along the metal ring.

[0007] Furthermore, the pull wire passes through the threading hole of the connecting tube and gathers into a rope at the connecting sleeve, and the rope is connected to the bottom of the adjusting screw. The pull wire can be pulled by turning the adjusting screw, and the pull wire drives the wire gathering ring, and the wire gathering ring drives the pressure plate to move backward through the guide pin shaft and compresses and tightens the middle part of the inner tube.

[0008] Furthermore, when the transducer annular array zoom mechanism is in a relaxed state, the pressing plate is in a straight state and parallel to the central axis of the inner tube. At this time, the inner diameter d of the envelope circle formed by the pressing plates under the support of the front end of the inner tube is equal to the maximum outer diameter D of the front end of the inner tube.

[0009] Furthermore, when the transducer annular array scaling mechanism is in a contracted state, the pressure plate is in a state of being inclined toward the inner tube and compressed and tightened in the middle of the inner tube. At this time, the inner diameter d of the envelope circle formed by the pressure plates under the support of the middle of the inner tube is smaller than the maximum outer diameter D of the front end of the inner tube. When the catheter passes through the stenosis of the blood vessel, the transducer annular array scaling mechanism completes the transition from the diastolic state to the contracted state to facilitate passing through the stenosis.

[0010] Furthermore, the pressing plate is L-shaped as a whole, including a short arm and a long arm; the transducer is pasted on the outer surface of the long arm, and the short arm is respectively provided with through holes for installing the metal ring and the wire pin shaft.

[0011] Furthermore, the guide pin shaft is zigzag-shaped as a whole; when the transducer annular array scaling mechanism is in a retracted state, the front end of the guide pin shaft tilts inwards and drives the short arm of the pressure plate to rotate, thereby realizing the pressure plate rotating along the metal ring and tilting inwards.

[0012] Furthermore, a truncated cone-shaped wire end sleeve is provided at the front end of the inner tube, and the rear end of the inner tube is located in the connecting tube; a heat shrink tube is provided outside the supporting tube.

[0013] Furthermore, the adjusting screw is arranged between the interface and the three-way pipe, and the three-way pipe is arranged at the rear end of the connecting sleeve.

[0014] A transducer annular array scaling mechanism comprises a plurality of pressure plates with transducers fixed on the outer surface, a wire gathering ring, a pull wire and a metal ring fixed in a supporting tube; the rear end of the pressure plate is movably mounted on the metal ring and arranged in a circular array on the outer side of an inner tube of a probe, the rear end of the pressure plate is simultaneously fixed on one end of a guide pin shaft, and a wire gathering ring is provided at the other end of the guide pin shaft; a pull wire is provided on the wire gathering ring, and the pull wire drives the wire gathering ring to enable the pressure plate to rotate inward along the metal ring.

[0015] Furthermore, when the transducer annular array scaling mechanism is in a relaxed state, the pressure plate is in a straight state and parallel to the central axis of the inner tube; when the transducer annular array scaling mechanism is in a contracted state, the pressure plate is inclined toward the inner tube and is compressed and tightened in the middle of the inner tube.

[0016] The present invention has the following advantages and positive effects:

[0017] 1. The diameter of the probe used in the present invention can be scaled to adapt to blood vessels of different diameters. There is no need to replace multiple types of probes, which is easy to operate and simplifies the surgical process.

[0018] 2. The probe used in the present invention can be tapered and scaled, and is suitable for CTO lesions where the guidewire cannot pass through. It can send and receive signals forward, diagnose the nature of the plaque, provide an effective reference for guidewire threading, and improve the permeability of the catheter in diffuse lesions of the outer perimeter.

[0019] 3. The probe used in the present invention can scan the lesions in the same area at different angles at the same position when the angle is adjusted, so as to fit the 3D imaging and help the surgeon understand the spatial structure of the lesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall assembly diagram of the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram of the enlarged cross-section structure of part A in the middle;

[0022] Figure 3 is an overall cross-sectional view of the present invention;

[0023] Figure 4 It is a schematic diagram of the external structure of the probe array zoom mechanism of the present invention;

[0024] Figure 5 It is a three-dimensional diagram of the internal structure of the support tube of the present invention;

[0025] Figure 6 It is a schematic diagram of the internal connection structure of the probe array zoom mechanism of the present invention;

[0026] Figure 7 It is a schematic diagram of the L-shaped pressing plate structure of the present invention;

[0027] Figure 8 1. It is a schematic diagram of the expanded state of the pressure plate and the assembly structure;

[0028] Fig. 9 It is a schematic diagram of the contracted state of the pressing plate and the assembly structure;

[0029] Fig.10 is a schematic diagram of the probe array zoom mechanism of the present invention in a relaxed state;

[0030] Fig.11 is a schematic diagram of the probe array zoom mechanism of the present invention in a retracted state;

[0031] In the figure, 1-interface; 2-adjusting screw; 3-tee pipe; 4-connecting sleeve; 5-connecting tube; 6-heat shrink tube; 7-wire head cover; 8-pull wire; 9-inner tube; 901-annular groove; 10-support tube; 101-support seat; 11-wire collection ring; 12-metal ring; 13-transducer; 14-pressure plate; 15-guide pin shaft; 16-short arm; 17-long arm. DETAILED DESCRIPTION

[0032] In order to further disclose the content, features and effects of the invention, the following examples are given and described in detail with reference to the accompanying drawings.

[0033] Example 1: See attached Figure 1-11 , an interventional ultrasound annular array catheter, comprising an adjustment screw 2, a connecting sleeve 4 and a connecting tube 5; the adjustment screw 2 is arranged behind the connecting sleeve 4, the front end of the connecting sleeve 4 is connected to the connecting tube 5, and the front end of the connecting tube 5 is installed with a probe; the probe comprises an inner tube 9 whose middle part shrinks inward, a transducer annular array zoom mechanism composed of a plurality of pressure plates 14 with transducers 13 fixed on the outer surface, and a support tube 10; the front end of the inner tube 9 is provided with a truncated cone-shaped wire head cover 7, and the rear end of the inner tube 9 is located in the connecting tube 5; the outside of the support tube 10 is provided with a heat shrink tube 6 connected to the connecting tube 5, the heat shrink tube 6 is used to protect the zoom mechanism, and is made of a deformable material, and can be deformed under a small external force. The inside of the support tube 10 is provided with a plurality of fixing seats 101 distributed in an annular array, and a metal ring 12 is arranged in the fixing seat 101. The adjustment screw 2 is arranged between the interface 1 and the three-way pipe 3, and the three-way pipe 3 is arranged at the rear end of the connecting sleeve 4.

[0034] The transducer annular array scaling mechanism also includes a wire collection ring 11, a pull wire 8 and a metal ring 12 fixed in the support tube 10. The rear end of the pressure plate 14 is movably mounted on the metal ring 12 and arranged in a circular array on the outside of the inner tube 9. The rear end of the pressure plate 14 is also fixed on one end of the guide pin 15, and the other end of the guide pin 15 is provided with a wire collection ring 11; the guide pin 15 is zigzag-shaped as a whole; when the transducer annular array scaling mechanism is in a retracted state, the front end of the guide pin 15 tilts inward and drives the short arm 16 of the pressure plate 14 to rotate, thereby realizing that the pressure plate 14 rotates along the metal ring 12 and tilts inward.

[0035] The cable collection ring 11 has four evenly distributed wire holes, each of which has a wire 8. The wire 8 drives the cable collection ring 11 to rotate the pressure plate 14 inward along the metal ring 12. The wire 8 passes through the wire threading hole of the connecting tube 5 and converges into a rope at the connecting sleeve 4, which is connected to the bottom of the adjusting screw 2.

[0036] like Figure 7-Figure 9 As shown, the pressing plate 14 is L-shaped as a whole, including a short arm 16 and a long arm 17; the transducer 13 is attached to the outer surface of the long arm 17, and the short arm 16 is respectively provided with through holes for installing the metal ring 12 and the guide pin 15. The inner tube 9 is provided with an annular groove 901 near the rear end, and the short arm 16 and the guide pin 15 move in the annular groove 901.

[0037] like Fig.10 As shown, when the transducer annular array zoom mechanism is in the expanded state, the pressing plate 14 is in a straight state and parallel to the central axis of the inner tube 9. At this time, the inner diameter d of the envelope circle formed by the pressing plates 14 under the support of the front end of the inner tube 9 is equal to the maximum outer diameter D of the front end of the inner tube 9.

[0038] like Fig.11 As shown, when the transducer annular array scaling mechanism is in a contracted state, the pressing plate 14 is in a state of tilting toward the inner tube 9 and is compressed and tightened in the middle of the inner tube 9. At this time, the inner diameter d of the envelope formed by the pressing plates 14 under the support of the middle of the inner tube 9 is smaller than the maximum outer diameter D of the front end of the inner tube 9. When the catheter passes through the stenosis of the blood vessel, the transducer annular array scaling mechanism completes the transition from the diastolic state to the contracted state to facilitate passing through the stenosis.

[0039] Working principle: Turning the adjustment screw 2 can pull the pull wire 8, which drives the wire collection ring 11, and the wire collection ring 11 drives the pressure plate 14 to move backward through the guide pin shaft 15 and compress and tighten the middle part of the inner tube 9. When the transducer annular array zoom mechanism is in the contracted state, the probe diameter is reduced, thereby improving the permeability of the catheter in the diffuse lesions of the outer perimeter.

[0040] Example 2: See attached Figure 4-11, a transducer annular array scaling mechanism, the pull wire 8 can also directly pass through the catheter from the connecting sleeve 4, and the doctor can directly operate the pull wire 8 according to personal habits. Other specific structures are basically the same as those described in Example 1.

[0041] Although the preferred embodiments of the present invention are described above, the present invention is not limited to the above specific embodiments, which are merely illustrative and not restrictive. Under the guidance of the present invention, a person skilled in the art can make many forms without departing from the scope of the present invention and the claims. All of these belong to the protection scope of the present invention.

Claims

1. An interventional ultrasound annular array catheter, characterized in that: It includes an adjustment screw, a connecting sleeve and a connecting pipe; the adjustment screw is arranged at the rear of the connecting sleeve, the front end of the connecting sleeve is connected to the connecting pipe, and the front end of the connecting pipe is installed with a probe; the probe includes an inner tube whose middle part is compressed and can shrink inward, a transducer annular array zoom mechanism composed of a plurality of pressure plates with transducers fixed on the outer surface, and a supporting tube; The transducer annular array scaling mechanism also includes a wire gathering ring, a pull wire and a metal ring fixed in the support tube. The rear end of the pressure plate is movably mounted on the metal ring and arranged in a circular array on the outside of the inner tube. The rear end of the pressure plate is also fixedly mounted on one end of the guide pin shaft, and a wire gathering ring is provided at the other end of the guide pin shaft. The wire gathering ring is provided with a pull wire, and the pull wire drives the wire gathering ring to enable the pressure plate to rotate inward along the metal ring.

2. The interventional ultrasound annular array catheter according to claim 1, characterized in that: The pulling wires are gathered into a rope at the connecting sleeve through the threading holes of the connecting tube, and the rope is connected to the bottom of the adjusting screw.

3. The interventional ultrasound annular array catheter according to claim 1, characterized in that: When the transducer annular array zoom mechanism is in a relaxed state, the pressure plate is in a straight state and parallel to the central axis of the inner tube.

4. The interventional ultrasound annular array catheter according to claim 1, characterized in that: When the transducer annular array zoom mechanism is in a contracted state, the pressing plate is in a state of being inclined toward the inner tube and is compressed and tightened in the middle of the inner tube.

5. The interventional ultrasound annular array catheter according to claim 1, characterized in that: The pressing plate is L-shaped as a whole, and comprises a short arm and a long arm; the transducer is pasted on the outer surface of the long arm, and through holes for installing a metal ring and a wire pin shaft are respectively provided on the short arm.

6. The interventional ultrasound annular array catheter according to claim 4, characterized in that: The guide pin shaft is zigzag-shaped as a whole; when the transducer annular array scaling mechanism is in a retracted state, the front end of the guide pin shaft tilts inwards and drives the short arm of the pressure plate to rotate, thereby realizing that the pressure plate rotates along the metal ring and tilts inwards.

7. An interventional ultrasound annular array catheter according to any one of claims 1 to 6, characterized in that: A truncated cone-shaped wire head cover is provided at the front end of the inner tube, and the rear end of the inner tube is located in the connecting tube; a heat shrink tube is provided outside the supporting tube.

8. The interventional ultrasound annular array catheter according to claim 7, characterized in that: The adjusting screw is arranged between the interface and the three-way pipe, and the three-way pipe is arranged at the rear end of the connecting sleeve.

9. A transducer annular array scaling mechanism, characterized in that: It includes a plurality of pressure plates with transducers fixed on the outer surface, a wire gathering ring, a pull wire and a metal ring fixed in a supporting tube; the rear end of the pressure plate is movably mounted on the metal ring and arranged in a circular array on the outside of the inner tube of the probe, and the rear end of the pressure plate is also fixed on one end of the guide pin shaft, and a wire gathering ring is provided at the other end of the guide pin shaft; a pull wire is provided on the wire gathering ring, and the pull wire drives the wire gathering ring to make the pressure plate rotate inward along the metal ring.

10. The transducer annular array scaling mechanism according to claim 9, characterized in that: When the transducer annular array scaling mechanism is in a relaxed state, the pressure plate is in a straight state and parallel to the central axis of the inner tube; when the transducer annular array scaling mechanism is in a contracted state, the pressure plate is inclined toward the inner tube and compressed and tightened in the middle of the inner tube.

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