Magnetically-driven ultrasonic catheter

Abstract

The utility model belongs to the technical field of ultrasonic imaging equipment, and particularly relates to a magnetic drive ultrasonic catheter which comprises a sleeve shaft, one end of the sleeve shaft is coaxially and fixedly connected with an ultrasonic transduction base, the other end of the sleeve shaft is coaxially and fixedly provided with a transmission shaft, and the end, close to the ultrasonic transduction base, of the sleeve shaft is fixedly provided with a coaxial adjusting assembly. The cannula shaft is kept coaxial with the blood vessel through the coaxial adjusting assembly. According to the intravascular ultrasonic imaging device, the ultrasonic transducer and the blood vessel can be kept coaxial in the intravascular ultrasonic imaging process, and the image distortion problem of ultrasonic imaging can be relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultrasonic imaging equipment, and particularly relates to a magnetically driven ultrasonic catheter. Background Art

[0002] Intravascular ultrasonic imaging is widely used in interventional cardiology to evaluate the lesion degree of diseased blood vessels in the human body, and also provides reliable data parameters for the formulation of interventional treatment plans. During interventional treatment, the ultrasonic transducer enters the blood vessel through the guidance of a flexible shaft, making it difficult to ensure the coaxiality of the transmission shaft and the blood vessel during the rotation for ultrasonic imaging. As a result, uneven rotational distortion occurs in the formed ultrasonic image, affecting the accuracy of judging the lesion state and greatly increasing the difficulty in subsequent treatment.

[0003] Therefore, it is necessary to design a magnetically driven ultrasonic catheter to solve the above technical problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a magnetically driven ultrasonic catheter to solve the problems existing in the above prior art.

[0005] To achieve the above purpose, the utility model provides a magnetically driven ultrasonic catheter, which includes a sleeve shaft. One end of the sleeve shaft is coaxially and fixedly connected with an ultrasonic transducer base, and the other end of the sleeve shaft is coaxially and fixedly installed with a transmission shaft. One end of the sleeve shaft close to the ultrasonic transducer base is fixedly provided with a coaxial adjustment assembly, and the sleeve shaft is kept coaxial with the blood vessel through the coaxial adjustment assembly.

[0006] Preferably, the coaxial adjustment assembly includes a hose body. The hose body is fixedly sleeved on the sleeve shaft. The hose body is arranged at one end of the sleeve shaft close to the ultrasonic transducer base. A magnetic sliding sleeve is slidably sleeved on the sleeve shaft. The hose body and the magnetic sliding sleeve are both coaxially arranged with the sleeve shaft. One end of a plurality of connecting rods is circumferentially hinged on the outer wall of the hose body, and one end of a plurality of rocker arms is circumferentially hinged on the outer wall of the magnetic sliding sleeve. The plurality of connecting rods and the plurality of rocker arms are arranged in one-to-one correspondence, and the end of the rocker arm is hinged to the end of the connecting rod. The length of the rocker arm is less than the length of the connecting rod.

[0007] Preferably, a support member is fixedly connected to one end of the connecting rod close to the rocker arm. The support member is in sliding contact with the inner wall of the blood vessel, and the end face of the support member in contact with the inner wall of the blood vessel is a curved surface structure.

[0008] Preferably, a ring cover is fixedly sleeved on the ultrasonic transducer base. The cross-section of the ring cover is a conical structure, and the large surface end of the ring cover abuts against one end of the hose body close to the ultrasonic transducer base. The cross-section of the hose body is a circular structure, and the diameter of the large surface end of the ring cover is not less than the diameter of the hose body.

[0009] Preferably, a groove is formed at one end of the ultrasonic transducer base away from the magnetic sliding sleeve, and the ultrasonic transducer is coaxially and fixedly installed on the ultrasonic transducer base through the groove.

[0010] Preferably, the transmission shaft is a flexible shaft.

[0011] Compared with the prior art, the utility model has the following advantages and technical effects:

[0012] A magnetic drive ultrasonic catheter provided by the utility model can adjust the opening angle according to the thickness of blood vessels through the arranged coaxial adjustment component, improving the versatility and application range; at the same time, through the arranged coaxial adjustment component, the sleeve shaft, the ultrasonic transducer base and the ultrasonic transducer can always be coaxial with the blood vessel, and can rotate flexibly under the drive of an external motor, realizing the stable and uniform rotation of the ultrasonic transducer, and alleviating the problem of image distortion of ultrasonic imaging caused by poor coaxiality of devices.

[0013] During the process of intravascular ultrasonic imaging, the utility model can ensure that the ultrasonic transducer is coaxial with the blood vessel, and can alleviate the problem of image distortion of ultrasonic imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0015] Figure 1 is a schematic structural diagram of a magnetic drive ultrasonic catheter proposed by the utility model;

[0016] Figure 2 is a schematic diagram of the positional relationship among the sleeve shaft, the hose body and the ring cover in the utility model;

[0017] Figure 3 is a schematic diagram of the connection relationship among the rocker, the connecting rod and the support member in the utility model;

[0018] Wherein: 1. Hose body; 2. Ultrasonic transducer base; 3. Magnetic sliding sleeve; 4. Rocker; 5. Connecting rod; 6. Sleeve shaft; 7. Transmission shaft; 8. Groove; 9. Support member; 10. Ring cover. Detailed implementation manners

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] To make the above objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0021] Referring to Figures 1 to 3 As shown, the present utility model provides a magnetically driven ultrasonic catheter, which includes a cannula shaft 6. One end of the cannula shaft 6 is coaxially and fixedly connected with an ultrasonic transducer base 2, and the other end of the cannula shaft 6 is coaxially fixedly installed with a transmission shaft 7. A coaxial adjustment assembly is fixedly arranged at one end of the cannula shaft 6 close to the ultrasonic transducer base 2, and the cannula shaft 6 is coaxial with the blood vessel through the coaxial adjustment assembly.

[0022] The coaxial adjustment assembly provided can adjust the opening angle according to the thickness of the blood vessel, improving the versatility and scope of use. At the same time, the coaxial adjustment assembly provided can keep the cannula shaft 6, the ultrasonic transducer base 2 and the ultrasonic transducer always coaxial with the blood vessel, and flexibly rotate under the drive of an external motor, realizing the stable and uniform rotation of the ultrasonic transducer, and alleviating the problem of image distortion in ultrasonic imaging caused by poor coaxiality of the devices.

[0023] During the process of intravascular ultrasonic imaging of the present utility model, it can ensure that the ultrasonic transducer is coaxial with the blood vessel, and can alleviate the problem of image distortion in ultrasonic imaging.

[0024] Further, the coaxial adjustment assembly includes a flexible hose body 1. The flexible hose body 1 is fixedly sleeved on the cannula shaft 6. The flexible hose body 1 is arranged at one end of the cannula shaft 6 close to the ultrasonic transducer base 2. A magnetic sliding sleeve 3 is slidably sleeved on the cannula shaft 6. The flexible hose body 1 and the magnetic sliding sleeve 3 are both coaxially arranged with the cannula shaft 6. One ends of a plurality of connecting rods 5 are circumferentially hinged on the outer wall of the flexible hose body 1, and one ends of a plurality of rocker arms 4 are circumferentially hinged on the outer wall of the magnetic sliding sleeve 3. The plurality of connecting rods 5 and the plurality of rocker arms 4 are arranged in one-to-one correspondence, and the end of the rocker arm 4 is hinged to the end of the connecting rod 5. The length of the rocker arm 4 is less than the length of the connecting rod 5.

[0025] The magnetic sliding sleeve 3 is axially slid along the axial direction of the sleeve shaft 6 under the control of the external magnet attraction. By controlling the distance between the magnetic sliding sleeve 3 and the hose body 1, the change of the angle between the hinge joints of the connecting rod 5 and the rocker 4 is realized, and the synchronous lifting and synchronous folding of multiple connecting rods 5 are achieved. At the same time, it can be applicable to patients with different blood vessel thicknesses, improving the versatility and the scope of use.

[0026] Furthermore, a support member 9 is fixedly connected to one end of the connecting rod 5 close to the rocker 4. The support member 9 is in sliding contact with the inner wall of the blood vessel, and the end face of the contact end of the support member 9 with the inner wall of the blood vessel is a curved surface structure.

[0027] In this embodiment, the support member 9 is made of silica gel material, reducing the pain of patients and preventing the blood vessel from being punctured at the same time.

[0028] Furthermore, a ring cover 10 is fixedly sleeved on the ultrasonic transducer base 2. The cross-section of the ring cover 10 is a conical structure, and the large surface end of the ring cover 10 abuts against one end of the hose body 1 close to the ultrasonic transducer base 2. The cross-section of the hose body 1 is a circular structure, and the diameter of the large surface end of the ring cover 10 is not less than the diameter of the hose body 1.

[0029] By providing the ring cover 10, and the ring cover 10 is a conical structure, the sleeve shaft 6 can smoothly enter the blood vessel. It should be noted that in this embodiment, the ring cover 10 is made of medical silica gel material, reducing the sense of irritation to patients.

[0030] Furthermore, a groove 8 is opened at one end of the ultrasonic transducer base 2 far from the magnetic sliding sleeve 3. The ultrasonic transducer is coaxially fixedly installed on the ultrasonic transducer base 2 through the groove 8.

[0031] By providing the groove 8, the disassembly and assembly of the ultrasonic transducer are facilitated, and the ultrasonic transducer is kept coaxial with the ultrasonic transducer base 2 and the sleeve shaft 6, improving the ultrasonic imaging effect.

[0032] Furthermore, the transmission shaft 7 is a flexible shaft.

[0033] Since the transmission shaft 7 is a flexible shaft, the impact caused by the external motor drive can be mitigated, reducing the pain of patients.

[0034] The magnetic drive ultrasonic catheter provided by the utility model has the following working principle: When in use, the ultrasonic transducer is fixedly installed on the ultrasonic transducer base 2 through the groove 8. At this time, the coaxial adjustment assembly is in a retracted state. After the forward-looking intravascular ultrasound catheter enters the blood vessel and reaches the target position, an external magnet is used to attract the magnetic sliding sleeve 3, and the magnetic sliding sleeve 3 slides axially along the sleeve shaft 6 and gradually moves away from the hose body 1. The magnetic sliding sleeve 3 drives the rocker 4 to rotate, and the rocker 4 pulls the connecting rod 5 to rotate. As the distance between the magnetic sliding sleeve 3 and the hose body 1 gradually increases, the expandable stent gradually opens to the position where it contacts the blood vessel wall. At this time, the position of the external magnet is fixed, the included angle at the hinge joint of the rocker 4 and the connecting rod 5 increases, and multiple connecting rods 5 are synchronously lifted to form an umbrella shape, constituting the expandable stent. The support member 9 abuts against the inner wall of the blood vessel to keep the sleeve shaft 6 and the ultrasonic transducer coaxial with the blood vessel. The driving transmission shaft 7 is rotated by an external motor, the driving transmission shaft 7 drives the sleeve shaft 6 to rotate on the magnetic sliding sleeve 3, and the sleeve shaft 6 drives the ultrasonic transducer to rotate in the blood vessel to perform the ultrasonic imaging process. After obtaining the image, the external magnet is used to control the magnetic sliding sleeve 3 to move in the opposite direction along the sleeve shaft 6, so that the expandable stent is retracted. At this time, the sleeve shaft 6 is pulled out of the blood vessel.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0036] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application.

Claims

1. A magnetic drive ultrasonic catheter, characterized in that, It includes a sleeve shaft (6), one end of the sleeve shaft (6) is coaxially and fixedly connected with an ultrasonic transducer base (2), the other end of the sleeve shaft (6) is coaxially and fixedly installed with a transmission shaft (7), a coaxial adjustment assembly is fixedly arranged at one end of the sleeve shaft (6) close to the ultrasonic transducer base (2), and the sleeve shaft (6) is kept coaxial with the blood vessel through the coaxial adjustment assembly.

2. The magnetic drive ultrasonic catheter according to claim 1, characterized in that, The coaxial adjustment assembly includes a hose body (1), the hose body (1) is fixedly sleeved on the sleeve shaft (6), the hose body (1) is arranged at one end of the sleeve shaft (6) close to the ultrasonic transducer base (2), a magnetic sliding sleeve (3) is slidably sleeved on the sleeve shaft (6), both the tube body (1) and the magnetic sliding sleeve (3) are coaxially arranged with the sleeve shaft (6), one ends of a plurality of connecting rods (5) are circumferentially hinged on the outer wall of the hose body (1), one ends of a plurality of rocker arms (4) are circumferentially hinged on the outer wall of the magnetic sliding sleeve (3), the plurality of connecting rods (5) and the plurality of rocker arms (4) are arranged in one-to-one correspondence, and the end of the rocker arm (4) is hinged to the end of the connecting rod (5), and the length of the rocker arm (4) is less than the length of the connecting rod (5).

3. The magnetic drive ultrasonic catheter according to claim 2, wherein One end of the connecting rod (5) close to the rocker arm (4) is fixedly connected with a support member (9), the support member (9) is in sliding contact with the inner wall of the blood vessel, and the end face of the support member (9) in contact with the inner wall of the blood vessel is a curved surface structure.

4. The magnetic drive ultrasonic catheter according to claim 1, wherein A ring cover (10) is fixedly sleeved on the ultrasonic transducer base (2), the cross section of the ring cover (10) is a conical structure, and the large end surface of the ring cover (10) abuts against one end of the hose body (1) close to the ultrasonic transducer base (2), the cross section of the hose body (1) is a circular structure, and the diameter of the large end surface of the ring cover (10) is not less than the diameter of the hose body (1).

5. The magnetic drive ultrasonic catheter according to claim 2, wherein A groove (8) is formed at one end of the ultrasonic transducer base (2) away from the magnetic sliding sleeve (3), and the ultrasonic transducer is coaxially and fixedly installed on the ultrasonic transducer base (2) through the groove (8).

6. The magnetic drive ultrasonic catheter according to claim 1, characterized in that, The transmission shaft (7) is a flexible shaft.

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