Pressure monitoring ultrasound catheter

Abstract

The utility model discloses a pressure monitoring ultrasonic catheter which comprises a catheter body, a pressure sensor and an ultrasonic host, the two ends of the catheter body are the front end and the rear end respectively, the pressure sensor is installed at the front end of the catheter body, the detection face of the pressure sensor is exposed, and the ultrasonic host is installed at the rear end of the catheter body. And the ultrasonic host is in wired or wireless connection with the pressure sensor. According to the pressure monitoring ultrasonic catheter, the pressure sensor is installed at the front end of the catheter body, when the front end of the catheter body stretches into the heart, the detection face of the pressure sensor makes contact with blood in the heart, and the pressure sensor can measure the pressure change in a blood channel through the detection face; the ultrasonic host can receive and process signals from the pressure sensor in real time and display the signals on the display screen in the form of images and data, and help is provided for disease diagnosis.

Description

Technical Field

[0001] The utility model relates to a medical device, in particular to a pressure monitoring ultrasonic catheter. Background Art

[0002] Radiofrequency catheter ablation is one of the important means of treating atrial fibrillation. During the operation, it is a mature technology to rely on X-ray fluoroscopy and three-dimensional electroanatomical mapping system to locate the catheter, build a heart model, confirm the ablation target, etc. However, the above methods cannot provide a completely clear and real-time picture of the internal anatomical structure of the heart, and may cause perioperative complications such as cardiac tamponade and pulmonary vein stenosis. At the same time, X-ray fluoroscopy brings certain radiation damage to patients and operators, especially for pregnant women and adolescents.

[0003] In order to avoid the above hazards, intracardiac ultrasound technology is currently commonly used. Different from traditional in vitro ultrasound diagnostic technology, intracardiac ultrasound technology places an ultrasound catheter in the heart cavity through peripheral blood vessels, and uses an ultrasound probe located in the catheter head area to accurately obtain the heart's anatomical structure at close range and in real time, and can simultaneously display cardiac hemodynamics, and dynamically evaluate local myocardial and overall heart function in real time. However, existing ultrasound catheters have problems such as complex pressure monitoring equipment structure, inconvenient operation, and low accuracy. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a pressure monitoring ultrasonic catheter in order to overcome the defects of the pressure detection equipment of the ultrasonic catheter in the prior art that the structure is complex and inconvenient to operate.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A pressure monitoring ultrasonic catheter comprises a catheter body, a pressure sensor and an ultrasonic host, wherein the two ends of the catheter body are respectively a front end and a rear end, the pressure sensor is installed at the front end of the catheter body, and the detection surface of the pressure sensor is exposed, and the ultrasonic host is connected to the pressure sensor by wire or wirelessly.

[0007] In this solution, the pressure monitoring ultrasound catheter is equipped with a pressure sensor at the front end of the catheter body. When the front end of the catheter body is extended into the heart, the detection surface of the pressure sensor contacts the blood in the heart. The pressure sensor can measure the pressure changes in the blood channel through the detection surface. The ultrasound host can receive and process the signal from the pressure sensor in real time, and display it on the display screen in the form of images and data. Doctors or technicians can understand the pressure changes of the heart by observing these images and data, including the diastolic and systolic pressures of the blood vessels in the heart cavity and the atria and ventricles. This information provides data support for diagnosing heart disease, evaluating heart function, and formulating treatment plans.

[0008] Preferably, the front end of the catheter body has a recessed portion, and the pressure sensor is located in the recessed portion.

[0009] In this solution, the pressure sensor is relatively hard compared to the rubber material at the front end. If it comes into contact with human tissue, it will cause discomfort to the patient. Therefore, the pressure sensor is set in a recessed portion to allow blood to contact the detection surface of the pressure sensor, thereby preventing the pressure sensor from directly contacting the inner wall of human tissue and causing discomfort to the patient.

[0010] Preferably, the recessed portion is located on the end surface of the front end.

[0011] In this solution, the above-mentioned structural setting is adopted to facilitate the pressure monitoring ultrasound catheter to measure the pressure value at the deepest front end.

[0012] Preferably, the pressure monitoring ultrasonic catheter further comprises a handle, and the rear end of the catheter body is connected to the handle.

[0013] In the present solution, the handle is used to fix the catheter body, and the handle is also used to hold and operate the pressure monitoring ultrasound catheter.

[0014] Preferably, a transducer is installed in the front end, and the transducer is electrically connected to the ultrasound host.

[0015] In this solution, the ultrasound host sends an electrical signal to the transducer, which converts the electrical signal into sound waves and uses the sound waves to detect tissues or organs. The sound waves are reflected after encountering human tissues. The ultrasound host then receives the reflected sound waves and processes them into images through algorithms, thereby achieving real-time imaging of human organs.

[0016] Preferably, the catheter body has a bendable section, which is located close to the front end. The ultrasonic catheter also includes a traction wire. A traction channel is provided in the catheter body, and the traction channel extends along the axial direction of the catheter body. One end of the traction wire extends into the traction channel and is fixedly connected to the front end of the catheter body, and the other end of the traction wire extends out of the traction channel and is connected to an adjustment handle.

[0017] In this solution, the bending direction of the bendable section of the catheter body is controlled by adjusting the handle to control the traction wire, so that the front end of the catheter body faces different directions, which makes it easier for the pressure sensor to measure the pressure values ​​at different positions of the heart.

[0018] Preferably, the catheter body is provided with at least one pair of the traction channels, and each pair of the traction channels are relatively arranged with the axis of the catheter body as the axis of symmetry.

[0019] In this solution, each pair of traction channels is relatively arranged with the axis of the catheter body as the axis of symmetry, so that the force exerted on the catheter body from the traction wire will be more uniform, and bending in at least two directions can be achieved, which is conducive to ensuring the bending effect of the traction wire.

[0020] Preferably, the material of the traction wire is polyamide or polyethylene.

[0021] In this solution, the traction wire material is a high-strength and low-elongation non-metallic material, such as polyamide and polyethylene, which has good controllability and can be bent according to the tube body without deformation.

[0022] Preferably, the pressure value detected by the pressure sensor does not exceed 300 mmHg.

[0023] Preferably, the pressure sensor is a liquid mechanical pressure sensor or a piezoelectric pressure sensor.

[0024] In this solution, the liquid mechanical pressure sensor or piezoelectric pressure sensor uses the liquid mechanical or piezoelectric pressure conversion principle to convert the pressure exerted by the blood on the sensor into an electrical signal output. The liquid mechanical pressure sensor usually consists of a movable diaphragm and a fixed measuring element. When the blood exerts pressure, the diaphragm moves, causing the measuring element to deform, thereby changing parameters such as resistance and capacitance, and then generating an electrical signal proportional to the pressure. The piezoelectric pressure sensor uses the piezoelectric effect of piezoelectric materials. When subjected to pressure, the material deforms and generates charge separation, thereby generating a voltage signal.

[0025] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0026] The positive progressive effect of the utility model is that the pressure monitoring ultrasonic catheter is equipped with a pressure sensor at the front end of the catheter body. When the front end of the catheter body is extended into the heart, the detection surface of the pressure sensor contacts the blood in the heart. The pressure sensor can measure the pressure change in the blood channel through the detection surface. The ultrasonic host can receive and process the signal from the pressure sensor in real time, and display it on the display screen in the form of images and data. Doctors or technicians can understand the pressure changes of the heart by observing these images and data, including the diastolic and systolic pressures of the blood vessels in the heart cavity and the atria and ventricles. This information provides data support for diagnosing heart disease, evaluating heart function and formulating treatment plans. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a pressure monitoring ultrasonic catheter according to a preferred embodiment of the utility model.

[0028] Figure 2 The figure is a partial structural diagram of a catheter body of a pressure monitoring ultrasonic catheter according to a preferred embodiment of the utility model.

[0029] Figure 3 for Figure 2 Enlarged view of part A.

[0030] Figure 4 This is a schematic diagram of a pressure monitoring ultrasound catheter of a preferred embodiment of the utility model being inserted into the heart during use.

[0031] Description of reference numerals:

[0032] Catheter body 1

[0033] Frontend 10

[0034] Bendable section 20

[0035] Backend 30

[0036] Depression 11

[0037] Handle 2

[0038] Pressure sensor 3

[0039] Transducer 4

[0040] Traction wire 5

[0041] Heart 100

[0042] Ultrasound scanning area 200 DETAILED DESCRIPTION

[0043] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0044] like Figure 1-Figure 4 As shown, this embodiment discloses a pressure monitoring ultrasonic catheter, which includes a catheter body 1, a pressure sensor 3 and an ultrasonic host (not shown in the figure), the two ends of the catheter body 1 are respectively a front end 10 and a rear end 30, the pressure sensor 3 is installed at the front end 10 of the catheter body 1, and the detection surface of the pressure sensor 3 is exposed, and the ultrasonic host is connected to the pressure sensor 3 by wire or wirelessly.

[0045] In this embodiment, the pressure monitoring ultrasound catheter is equipped with a pressure sensor 3 at the front end 10 of the catheter body 1. When the front end 10 of the catheter body 1 is inserted into the heart 100, the detection surface of the pressure sensor 3 contacts the blood in the heart 100. The pressure sensor 3 can measure the pressure change in the blood channel through the detection surface. The ultrasound host can receive and process the signal from the pressure sensor 3 in real time, and display it on the display screen in the form of images and data. Doctors or technicians can understand the pressure changes of the heart 100 by observing these images and data, including the diastolic and systolic pressures of the blood vessels in the heart cavity and the atria and ventricles. This information provides data support for diagnosing heart 100 diseases, evaluating heart 100 functions, and formulating treatment plans.

[0046] like Figure 2 and Figure 3 As shown, the front end 10 of the catheter body 1 has a recessed portion 11, and the pressure sensor 3 is located in the recessed portion 11. Compared with the rubber material of the front end 10, the pressure sensor 3 has a relatively high hardness, and if it contacts with human tissue, it will cause discomfort to the patient. Therefore, the pressure sensor 3 is arranged in the recessed portion 11, allowing blood to contact the detection surface of the pressure sensor 3, and avoiding the pressure sensor 3 from directly contacting the inner wall of the human tissue and causing discomfort to the patient.

[0047] like Figure 3 As shown, preferably, the recessed portion 11 is located on the end surface of the front end 10 , so that the pressure monitoring ultrasound catheter can measure the deepest pressure value of the front end 10 of the catheter body 1 .

[0048] like Figure 1 As shown, in order to facilitate hand holding and operation of the pressure monitoring ultrasonic catheter, the pressure monitoring ultrasonic catheter also includes a handle 2 , and the rear end 30 of the catheter body 1 is connected to the handle 2 .

[0049] like Figure 2 and Figure 3 As shown, a transducer 4 is installed in the front end 10, and the transducer 4 is electrically connected to the ultrasound host. When working, the ultrasound host sends an electrical signal to the transducer 4, and the transducer 4 converts the electrical signal into sound waves, and uses the sound waves to detect human tissues or organs. The sound waves are reflected after encountering human tissues, and the ultrasound host receives the reflected sound waves and processes them into images through algorithms, thereby realizing real-time imaging of human organs.

[0050] like Figure 2As shown, the catheter body 1 has a bendable section 20, which is located near the front end 10. The ultrasonic catheter also includes a traction wire 5. A traction channel is provided in the catheter body 1, which extends along the axial direction of the catheter body 1. One end of the traction wire 5 extends into the traction channel and is fixedly connected to the front end 10 of the catheter body 1, and the other end of the traction wire 5 extends out of the traction channel and is connected to an adjustment handle 2. The traction wire 5 is controlled by adjusting the handle 2 to control the bending direction of the bendable section 20 of the catheter body 1, so that the front end 10 of the catheter body 1 faces different directions, which is convenient for the pressure sensor 3 to measure the pressure values ​​of the heart 100 at different positions.

[0051] like Figure 2 As shown, preferably, the catheter body 1 is provided with at least one pair of traction channels, and each pair of traction channels is relatively arranged with the axis of the catheter body 1 as the axis of symmetry. Each pair of traction channels is relatively arranged with the axis of the catheter body 1 as the axis of symmetry, so that the force exerted on the catheter body 1 by the traction wire 5 will be more uniform, and the traction wire 5 can be bent in at least two directions, which is conducive to ensuring the bending effect of the traction wire 5.

[0052] The material of the traction wire 5 is polyamide or polyethylene. The traction wire 5 is a high-strength, low-elongation non-metallic material, such as polyamide and polyethylene, which has good controllability and can be bent according to the tube body without deformation.

[0053] In this embodiment, the pressure sensor 3 is a liquid mechanical pressure sensor 3 or a piezoelectric pressure sensor 3. The liquid mechanical pressure sensor 3 or the piezoelectric pressure sensor 3 utilizes the liquid mechanical or piezoelectric pressure conversion principle to convert the pressure exerted by the blood on the sensor into an electrical signal output. The liquid mechanical pressure sensor 3 is usually composed of a movable diaphragm and a fixed measuring element. When the blood exerts pressure, the diaphragm moves, causing the measuring element to deform, thereby changing parameters such as resistance and capacitance, and then generating an electrical signal proportional to the pressure. The piezoelectric pressure sensor 3 utilizes the piezoelectric effect of piezoelectric materials. When subjected to pressure, the material deforms and generates charge separation, thereby generating a voltage signal. The pressure value detected by the pressure sensor 3 does not exceed 300 mmHg.

[0054] The pressure sensor 3 can be connected to the ultrasound host in a wired manner or in a wireless manner. The pressure sensor 3 transmits the collected electrical signal to the ultrasound host for processing and display. The ultrasound device host can receive and process the signal from the pressure sensor 3 in real time and display it in the form of images and data. Doctors or technicians can understand the pressure changes of the heart 100 by observing these images and data, including the diastolic and systolic pressures of the blood vessels in the heart cavity and the atria and ventricles. This information provides data support for diagnosing heart 100 diseases, evaluating heart 100 functions, and formulating treatment plans.

[0055] like Figure 4 As shown, a schematic diagram of a pressure monitoring ultrasound catheter inserted into a heart 100 during use, and Figure 4 An ultrasound scanning area 200 of a pressure monitoring ultrasound catheter is shown in FIG.

[0056] In the description of this article, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 cannot be understood as a limitation on the present invention.

[0057] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A pressure monitoring ultrasound catheter, characterized in that: The pressure monitoring ultrasound catheter comprises a catheter body, a pressure sensor and an ultrasound host, the two ends of the catheter body are respectively a front end and a rear end, the pressure sensor is installed at the front end of the catheter body, and the detection surface of the pressure sensor is exposed, and the ultrasound host is connected to the pressure sensor by wire or wirelessly; The front end of the catheter body has a recessed portion, and the pressure sensor is located in the recessed portion; The recessed portion is located on the end surface of the front end.

2. The pressure monitoring ultrasound catheter according to claim 1, characterized in that: The pressure monitoring ultrasonic catheter also includes a handle, and the rear end of the catheter body is connected to the handle.

3. The pressure monitoring ultrasound catheter according to claim 1, characterized in that: A transducer is installed in the front end, and the transducer is electrically connected to the ultrasonic host.

4. The pressure monitoring ultrasound catheter according to claim 1, characterized in that: The catheter body has a bendable section, the bendable section is located near the front end, The ultrasonic catheter also includes a traction wire. A traction channel is opened in the catheter body and extends axially along the catheter body. One end of the traction wire extends into the traction channel and is fixedly connected to the front end of the catheter body, and the other end of the traction wire extends out of the traction channel and is connected to an adjustment handle.

5. The pressure monitoring ultrasound catheter according to claim 4, characterized in that: The catheter body is provided with at least one pair of the traction channels, and each pair of the traction channels is relatively arranged with the axis of the catheter body as a symmetric axis.

6. The pressure monitoring ultrasound catheter according to claim 4, characterized in that: The material of the traction wire is polyamide or polyethylene.

7. The pressure monitoring ultrasound catheter according to claim 1, characterized in that: The pressure value detected by the pressure sensor does not exceed 300 mmHg.

8. The pressure monitoring ultrasound catheter according to any one of claims 1 to 7, characterized in that: The pressure sensor is a liquid mechanical pressure sensor or a piezoelectric pressure sensor.

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