Interventional ultrasonic annular array catheter and transducer annular array scaling mechanism

Abstract

The utility model 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 end of the pressing plate is movably installed on the metal ring and distributed on the outer side of the inner pipe in a circumferential array mode, the rear end of the pressing plate is fixedly installed at one end of the guide pin shaft, 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 utility model further comprises a transducer annular array scaling mechanism. The diameter of the probe is scalable, the probe is adaptive to blood vessels with different diameters, the operation is convenient, and the operation process is simplified.

Description

Technical Field

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

[0002] In the field of peripheral vascular interventional therapy, especially for the treatment of chronic total occlusions (CTOs), existing ultrasonic annular array catheters face numerous challenges, the primary of which is the mismatch between their diverse models and the complexity of vascular anatomy. Because each patient's vessel diameter, course, and branching vary significantly, particularly between the arteries above and below the knee, a single catheter model is unable to meet diverse clinical needs. This not only increases the complexity and difficulty of the surgical procedure but can also increase the risk of vascular injury due to inappropriate catheter size.

[0003] Furthermore, the currently commonly used circular array ultrasound probes have technical limitations, including an inability to directly transmit and receive signals forward, making them particularly inadequate for diagnosing CTO lesions. CTO lesions often involve complex plaque structures, including calcification, fibrosis, and lipid deposition. Accurate identification of plaque properties is crucial for developing treatment plans. However, due to limitations in existing probe design, physicians are unable to obtain real-time, intuitive information about the properties of the plaque in front of the lesion, which undoubtedly increases treatment uncertainty and potential risks.

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

[0005] In order to solve the technical problems existing in the known technology, the utility model 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 an effective reference for guidewire threading, thereby improving patient prognosis and reducing the incidence of complications.

[0006] The utility model includes the following technical solutions: an interventional ultrasound annular array catheter, comprising an adjusting screw, a connecting sleeve and a connecting tube; the adjusting 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 which can shrink inward under pressure in the middle, 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, and the rear end of the pressure plate is simultaneously fixed on one end of the guide pin shaft, and the other end of the guide pin shaft is provided with a wire gathering ring; the wire gathering ring is provided with a pull wire, and the pull wire drives the wire gathering ring to rotate the pressure plate inward along the metal ring.

[0007] Furthermore, the pull wires pass through the threading holes of the connecting tube and converge into a single rope at the connecting sleeve, which is then connected to the bottom of the adjustment screw. Turning the adjustment screw pulls the pull wires, which in turn drives the wire gathering ring, which in turn drives the pressure plate backwards via the guide pin and compresses and tightens the middle of the inner tube.

[0008] Furthermore, when the transducer annular array zoom mechanism is in a relaxed state, the pressure plates are in a straight state and parallel to the central axis of the inner tube. At this time, the inner diameter d of the envelope formed by the plurality of pressure plates supported by 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 its contracted state, the pressure plates are tilted toward the inner tube and compressed and tightened in the middle of the inner tube. At this point, the inner diameter d of the envelope formed by the pressure plates, supported by the middle of the inner tube, is smaller than the maximum outer diameter D of the inner tube's front end. When the catheter passes through a stenotic area, the transducer annular array scaling mechanism transitions from its expanded state to its contracted state, facilitating passage through the stenosis.

[0010] Furthermore, the pressure 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 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 inward and drives the short arm of the pressure plate to rotate, thereby realizing the pressure plate rotating along the metal ring and tilting inward.

[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 inside the connecting tube; a heat shrink tube is provided on the outside of the support tube.

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

[0014] A transducer annular array scaling mechanism comprises several pressure plates with transducers fixed on their outer surfaces, a wire gathering ring, a pull wire and a metal ring fixed in a 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 of the probe, and 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 compressed and tightened in the middle of the inner tube.

[0016] The advantages and positive effects of this utility model are:

[0017] 1. The diameter of the probe used in this utility model 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 to diagnose the nature of the plaque, provide an effective reference for guidewire threading, and improve the passability of the catheter in diffuse lesions on the outer periphery.

[0019] 3. The probe used in the present invention can scan the lesion 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 drawing of the utility model;

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

[0022] Figure 3 It is an overall cross-sectional view of the utility model;

[0023] Figure 4 This is a schematic diagram of the external structure of the probe array zoom mechanism of the utility model;

[0024] Figure 5 This is a three-dimensional diagram of the internal structure of the support tube of the present utility model;

[0025] Figure 6 This is a schematic diagram of the internal connection structure of the probe array zoom mechanism of the utility model;

[0026] Figure 7 This is a schematic diagram of the assembly of the L-shaped pressing plate of the utility model;

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

[0028] Figure 9 1. It is a schematic diagram of the contracted state of the pressure plate and the assembly structure;

[0029] Figure 10 This is a schematic diagram of the probe array zoom mechanism of the utility model in a diastolic state;

[0030] Figure 11 This is a schematic diagram of the probe array zoom mechanism of the utility model in a retracted state;

[0031] In the figure, 1-interface; 2-adjusting screw; 3-tee pipe; 4-connecting sleeve; 5-connecting pipe; 6-heat shrink tube; 7-wire end sleeve; 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 present 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 comprises an adjustment screw 2, a connecting sleeve 4, and a connecting tube 5. The adjustment screw 2 is positioned behind the connecting sleeve 4. The front end of the connecting sleeve 4 is connected to the connecting tube 5, which has a probe mounted on its front end. The probe comprises an inner tube 9 with an inwardly tapered center, a transducer annular array zoom mechanism consisting of a plurality of pressure plates 14 with transducers 13 fixed to their outer surfaces, and a support tube 10. The front end of the inner tube 9 is provided with a truncated cone-shaped wire end sleeve 7, and the rear end of the inner tube 9 is positioned within the connecting tube 5. The support tube 10 is externally provided with a heat shrink tubing 6 connected to the connecting tube 5. The heat shrink tubing 6 is used to protect the zoom mechanism and is made of a deformable material that deforms under minimal external force. The support tube 10 is internally provided with a plurality of fixing seats 101 arranged in an annular array, each of which contains a metal ring 12. The adjustment screw 2 is positioned between the interface 1 and the tee 3, which is positioned 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 to 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 ring 11 has four evenly distributed holes around its circumference, each of which is provided with a cable 8. The cable 8 drives the cable ring 11 to rotate the pressure plate 14 inward along the metal ring 12. The cable 8 passes through the threading holes 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 pressure plate 14 is L-shaped and includes 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 provided with through holes for mounting the metal ring 12 and the guide pin 15. An annular groove 901 is provided near the rear end of the inner tube 9, and the short arm 16 and the guide pin 15 move within the annular groove 901.

[0037] like Figure 10 As shown, when the transducer annular array zoom mechanism is in the expanded state, the pressure 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 formed by the plurality of pressure plates 14 supported by 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 Figure 11 As shown, when the transducer annular array scaling mechanism is in its contracted state, the pressure plate 14 is tilted toward the inner tube 9 and compressed and tightened in the middle of the inner tube 9. At this point, the inner diameter d of the envelope formed by the pressure plates 14, supported by the middle of the inner tube 9, is smaller than the maximum outer diameter D at the front end of the inner tube 9. When the catheter passes through a stenotic area, the transducer annular array scaling mechanism transitions from its expanded state to its contracted state, facilitating passage through the stenosis.

[0039] Working Principle: Turning adjustment screw 2 pulls pull wire 8, which drives cable collection ring 11. Cable collection ring 11, via guide pin 15, drives pressure plate 14 rearward, compressing and tightening the center of inner tube 9. When the transducer annular array zoom mechanism is in the contracted state, the probe diameter is reduced, thereby improving the catheter's ability to pass diffuse lesions along the outer perimeter.

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

[0041] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, those skilled in the art can devise various forms without departing from the spirit of the present invention and the scope of protection of the claims. All such forms fall within the scope of protection of the present invention.

Claims

1. An interventional ultrasound annular array catheter, characterized by: It includes 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 the front end of the connecting tube is installed with a probe; the probe includes an inner tube whose middle part is compressed and can shrink inward, a transducer ring array zoom 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 to one end of the guide pin shaft, and the other end of the guide pin shaft is provided with a wire gathering ring; 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 pass through the threading holes of the connecting tube and converge into a rope at the connecting sleeve, 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 pressing 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, 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 provided with through holes for installing a metal ring and a wire pin shaft.

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. The interventional ultrasound annular array catheter according to any one of claims 1 to 6, characterized in that: The front end of the inner tube is provided with a truncated cone-shaped wire end sleeve, and the rear end of the inner tube is located in the connecting tube; the outside of the supporting tube is provided with a heat shrink 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 tee pipe, and the tee pipe is arranged at the rear end of the connecting sleeve.

9. A transducer ring array scaling mechanism, characterized by: It includes several pressure plates with transducers fixed on the outer surface, 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 installed 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 the other end of the guide pin shaft is provided with a wire gathering ring; the wire gathering ring is provided with a pull wire, and the pull wire drives the wire gathering ring to make the pressure plate rotate inward along the metal ring.

10. The transducer ring 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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