Doppler probe for measuring flow in blood vessel

Abstract

The utility model provides a Doppler probe for measuring flow in a blood vessel. The Doppler probe comprises a T-shaped probe support composed of a transverse extending part and a vertical extending part. Wherein a first linear array probe is arranged on the transverse extension part, and a second linear array probe is arranged on the vertical extension part; during use, the transverse extension part is arranged perpendicular to a blood vessel so as to detect the diameter of the blood vessel through the first linear array probe of the transverse extension part, and the vertical extension part is arranged at the center of the blood vessel in the extension direction of the blood vessel so as to detect the included angle between the vertical extension part and the extension direction of the blood vessel through the second linear array probe of the vertical extension part.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a doppler probe for intravascular flow measurement. BACKGROUND

[0002] In the medical field, generally adopt doppler probe to carry out evaluation to the arterial blood flow dynamics through ultrasonic doppler effect.

[0003] For intravascular flow measurement, need to know the diameter of blood vessel and flow velocity, so as to utilize formula "flow rate = flow velocity * area", can obtain the desired result. Therefore, in order to reduce error, flow velocity measurement needs to be as accurate as possible, needs to collect the real flow velocity of parallel blood vessels.

[0004] However, in the prior art, there is no technical scheme that can obtain the real flow velocity of parallel blood vessels particularly accurately. UTILITY MODEL CONTENTS

[0005] The utility model relates to the technical problems that the utility model wants to solve are in prior art the above-mentioned defects, provide a doppler probe for intravascular flow measurement, it can obtain the real flow velocity of parallel blood vessels particularly accurately.

[0006] According to the utility model, provide a doppler probe for intravascular flow measurement, it is characterized by including: the T type probe support that is composed of horizontal extension and vertical extension, wherein, the first linear array probe is arranged on horizontal extension, and the second linear array probe is arranged on vertical extension, in use, horizontal extension is arranged perpendicular to blood vessel to utilize the first linear array probe of horizontal extension to detect the diameter of blood vessel, and moreover, the position of vertical extension in the center of blood vessel is arranged along the extension direction of blood vessel to utilize the second linear array probe of vertical extension to detect the included angle of vertical extension and the extension direction of blood vessel.

[0007] Preferably, the first linear array probe and the second linear array probe have different operating frequencies.

[0008] Preferably, the vertical extension is further provided with a Doppler probe, and the Doppler probe is activated to detect the blood flow velocity in the blood vessel after the second linear array probe detects the included angle of the vertical extension and the extension direction of the blood vessel, and the second linear array probe stops working after detecting the included angle of the vertical extension and the extension direction of the blood vessel.

[0009] Preferably, the pulsed wave Doppler probe and the second linear array probe have different operating frequencies.

[0010] The utility model also provides a kind of Doppler probe for blood vessel internal flow measurement, it is characterized by comprising: the T-shaped probe support consisting of transverse extension and vertical extension;Wherein, first linear array probe is arranged on transverse extension, vertical extension has installation component, second linear array probe and Doppler probe are arranged in the vertical extension in detachable mode via installation component;When using, transverse extension is arranged perpendicular to blood vessel to detect the diameter of blood vessel using the first linear array probe of transverse extension, and vertical extension is arranged along the extension direction of blood vessel to detect the included angle of vertical extension and blood vessel extension direction using the second linear array probe of vertical extension.

[0011] Preferably, the first linear array probe and the second linear array probe have different operating frequencies.

[0012] Preferably, the pulsed wave Doppler probe and the second linear array probe have different operating frequencies.

[0013] Preferably, the Doppler probe is used for blood flow of internal carotid artery supplying blood to brain. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be more completely understood and its accompanying advantages and features will be more easily understood by referring to the following detailed description in conjunction with the accompanying drawings, in which:

[0015] Figure 1 The overall schematic diagram of the Doppler probe for blood vessel internal flow measurement according to the preferred embodiment of the utility model is schematically shown.

[0016] Figure 2 The schematic diagram of the Doppler probe for blood vessel internal flow measurement according to the preferred embodiment of the utility model when in use is schematically shown.

[0017] Figure 3 The pulsed wave Doppler probe sampling gate according to the preferred embodiment of the utility model for blood vessel internal flow measurement is schematically shown.

[0018] It should be noted that the drawings are used to illustrate the utility model, not to limit the utility model. It should be noted that the drawings showing the structure can not be drawn to scale. And in the drawings, the same or similar elements are marked with the same or similar reference numerals. DETAILED DESCRIPTION

[0019] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0020] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0023] Figure 1 The overall schematic diagram of the Doppler probe for intravascular flow measurement according to the preferred embodiment of the present application is schematically shown.

[0024] As Figure 1 shown, the Doppler probe for intravascular flow measurement according to the preferred embodiment of the present application comprises a T-shaped probe support composed of a transverse extension 10 and a vertical extension 20; wherein the first linear array probe is arranged on the transverse extension 10, and the second linear array probe is arranged on the vertical extension 20.

[0025] Thus, as Figure 2 shown, in use, the transverse extension 10 is arranged perpendicular to the blood vessel to detect the diameter of the blood vessel by the first linear array probe of the transverse extension 10, and the vertical extension 20 is arranged at the position of the center of the blood vessel along the extension direction of the blood vessel to detect the included angle between the vertical extension 20 and the extension direction of the blood vessel by the second linear array probe of the vertical extension 20.

[0026] Preferably, the first linear array probe and the second linear array probe have different operating frequencies, thereby improving signal accuracy.

[0027] As can be seen, the T-shaped probe holder secures two linear array probes. The first linear array probe locates the carotid artery and guides the second linear array probe to probe the carotid artery (passing through the center of the vessel, at its largest cross-section). This allows the angle between the carotid artery and the second linear array probe to be determined, enabling accurate calculation of Doppler blood flow velocity. Because the T-shaped probe holder is designed vertically, once the second linear array probe is parallel to the carotid artery, the first linear array probe is necessarily perpendicular to the vessel, ensuring that the center of the first linear array probe is aligned directly with the center of the vessel.

[0028] The optimal approach for subsequent acquisition is to use both probes simultaneously, acquiring vessel diameter and flow velocity simultaneously and performing real-time calculations. A higher frame rate results in more accurate calculations. To this end, in a preferred embodiment, once the physical location is determined, the second linear array probe can be replaced by a pulsed-wave Doppler probe.

[0029] Therefore, preferably, a Doppler probe is also disposed on the vertically extending portion 20, and after the second linear array probe detects the angle between the vertically extending portion 20 and the extending direction of the blood vessel, the Doppler probe starts operating to detect the blood flow velocity in the blood vessel. The second linear array probe stops operating after detecting the angle between the vertically extending portion 20 and the extending direction of the blood vessel.

[0030] Alternatively, the vertical extension portion 20 may have a mounting assembly, such that the second linear array probe and the Doppler probe are detachably mounted on the vertical extension portion 20 via the mounting assembly. Thus, after the second linear array probe detects the angle between the vertical extension portion 20 and the direction in which the blood vessel extends, the second linear array probe is removed from the vertical extension portion 20 and the Doppler probe is mounted.

[0031] And further preferably, the pulse wave Doppler probe and the second linear array probe have different operating frequencies.

[0032] Therefore, replacing linear arrays with pulsed wave Doppler probes can further improve frame rates and reduce costs (most devices do not support two linear arrays operating simultaneously). Furthermore, the pulsed wave Doppler probe can operate at a different frequency than the linear array, allowing the two probes to operate synchronously, maximizing frame rates. The first linear array probe can also narrow its sampling range, further improving frame rates. Because vessel diameters continuously change during the cardiac cycle, the first linear array probe must monitor blood vessels in real time.

[0033] In addition, if Figure 3As shown, the pulsed wave Doppler probe samples through the center line of the blood vessel, and since most blood vessels are round, the blood flow velocity distribution can be simplified as a laminar flow. The pulsed wave Doppler probe uses a smaller sampling gate to more accurately obtain the laminar flow velocity distribution of the blood flow, and then, by using the included angle of the blood vessel obtained by the second linear array probe, the blood flow velocity in the blood vessel can be calculated.

[0034] For example, as shown in FIG. 1, the pulsed wave Doppler probe has a first sampling gate 31 and a third sampling gate 33 located on both sides of the second sampling gate 32. Figure 3 As shown, the pulsed wave Doppler probe has a second sampling gate 32 located on the center line of the blood vessel, and a first sampling gate 31 and a third sampling gate 33 located on both sides of the second sampling gate 32, respectively.

[0035] Moreover, the Doppler probe for blood flow measurement in a blood vessel according to the preferred embodiment of the present application calculates the instantaneous flow Q by using the following formula:

[0036] Q = V2*S2 + S13*(V1+V3) / 2;

[0037] Wherein, V1 is the effective flow rate obtained by multiplying the flow rate of the first sampling gate 31 detected by the pulsed wave Doppler probe by the cosine value of the included angle between the vertical extension 20 and the extension direction of the blood vessel, V2 is the effective flow rate obtained by multiplying the flow rate of the second sampling gate 32 detected by the pulsed wave Doppler probe by the cosine value of the included angle between the vertical extension 20 and the extension direction of the blood vessel, V3 is the effective flow rate obtained by multiplying the flow rate of the third sampling gate 33 detected by the pulsed wave Doppler probe by the cosine value of the included angle between the vertical extension 20 and the extension direction of the blood vessel, S2 is the area of the circular region where the second sampling gate 32 is located, and S13 is the size of the area after the blood vessel area is subtracted by S2.

[0038] The instantaneous flow can be obtained by the product of the blood vessel area and the blood flow velocity, and the final blood flow is obtained by integrating the instantaneous flow with respect to time.

[0039] The device for measuring blood flow in a blood vessel according to the present application as described above, in specific embodiments, takes the blood flow in the internal carotid artery (ICA) which is mainly used for supplying blood to the brain as an example, but is not limited to the measurement of the carotid artery. For example, the present application can also be used for blood flow measurement in the external carotid artery (ECA).

[0040] In addition, it should be noted that, unless otherwise specified, the terms "first", "second", "third" and the like in the specification are merely used to distinguish the components, elements, steps and the like in the specification, and are not used to indicate the logical relationship or the order relationship between the components, elements, steps and the like.

[0041] It can be understood that although the utility model has disclosed as above with preferable embodiments, the above embodiments are not used to limit the utility model. For any skilled person in the art, without departing from the technical scheme range of the utility model, many possible changes and modifications or equivalent embodiments of equivalent changes of the utility model technical scheme can be made by using the disclosed technical content. Therefore, any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the utility model without departing from the content of the utility model technical scheme, all still belong to the range of the utility model technical scheme protection.

Claims

1. A Doppler probe for intravascular flow measurements, characterized by Comprise: A T-shaped probe support consisting of a transverse extension and a vertical extension; wherein the first linear array probe is arranged on the transverse extension, and the second linear array probe is arranged on the vertical extension; in use, the transverse extension is arranged perpendicularly to the blood vessel to detect the diameter of the blood vessel by the first linear array probe of the transverse extension, and the vertical extension is arranged along the extension direction of the blood vessel at the position of the center of the blood vessel to detect the angle between the vertical extension and the extension direction of the blood vessel by the second linear array probe of the vertical extension.

2. The Doppler probe for intravascular flow measurement according to claim 1, characterized in that, The first linear array probe and the second linear array probe have different working frequencies.

3. Doppler probe for intravascular flow measurement according to claim 1 or 2, characterized in that A Doppler probe is also arranged on the vertical extension, and is started to work to detect the blood flow rate in the blood vessel after the second linear array probe detects the angle between the vertical extension and the extension direction of the blood vessel; while the second linear array probe stops working after detecting the angle between the vertical extension and the extension direction of the blood vessel.

4. The Doppler probe for intravascular flow measurement according to claim 3, characterized in that, The pulsed wave Doppler probe and the second linear array probe have different working frequencies.

5. A Doppler probe for intravascular flow measurements, characterized by Comprise: A T-shaped probe support consisting of a transverse extension and a vertical extension; wherein the first linear array probe is arranged on the transverse extension, and the vertical extension has a mounting assembly, and the second linear array probe and the Doppler probe are arranged on the vertical extension in a detachable manner via the mounting assembly; in use, the transverse extension is arranged perpendicularly to the blood vessel to detect the diameter of the blood vessel by the first linear array probe of the transverse extension, and the vertical extension is arranged along the extension direction of the blood vessel at the position of the center of the blood vessel to detect the angle between the vertical extension and the extension direction of the blood vessel by the second linear array probe of the vertical extension.

6. The Doppler probe for intravascular flow measurement according to claim 5, characterized in that, The first linear array probe and the second linear array probe have different working frequencies.

7. The Doppler probe for intravascular flow measurement according to claim 5, characterized in that, The pulsed wave Doppler probe and the second linear array probe have different working frequencies.

8. The Doppler probe for intravascular flow measurement according to claim 5, characterized in that, The Doppler probe is used to detect the blood flow rate of the internal carotid artery that supplies blood to the brain.

Images