A blood vessel diameter measuring probe and device

Abstract

The present invention provides a blood vessel diameter measuring probe and device, which relates to the field of medical detection equipment. The measuring probe includes a base, a reflection clamping head, a driving component and a potentiometer component. A clamping portion is formed at one end of the reflection clamping head, and the other end of the reflection clamping head is slidably matched with the base; the driving component is connected to the other end of the reflection clamping head; the potentiometer component includes a first conductive member and a second conductive member, the first conductive member is arranged on the base and is electrically connected to an ultrasonic blood vessel flow meter, the second conductive member is connected to the driving component, the second conductive member contacts the first conductive member, and the second conductive member is electrically connected to the ultrasonic blood vessel flow meter. The reflection clamping head is driven by the driving component to move relative to the base, and the distance between the clamping portion and the base can be freely adjusted, so that blood vessels of different diameters can be measured, and multiple replacement of the measuring probe is avoided, thereby improving the measurement efficiency; and the blood vessel and the clamping portion can be better fitted, thereby improving the accuracy of the measurement result.

Description

Technical Field

[0001] The present invention relates to the field of medical testing equipment, and in particular to a blood vessel diameter measuring probe and device. Background Art

[0002] Vascular anastomosis or repair technology is a widely used technology in surgical operations, and is commonly used in coronary artery bypass grafting, intracranial vascular bypass grafting, carotid endarterectomy, organ transplantation and other operations. Vascular anastomosis or repair technology is a microsurgical technology. The specific operation process is to connect the broken ends of the blood vessels into a complete blood vessel by suturing, or to sew the vascular patch to the rupture of the blood vessel to achieve the purpose of repairing the damage. The above technology requires extremely high operating skills of the surgeon, and its difficulties are reflected in the following aspects: ① The surgeon needs to ensure that the anastomosis is unobstructed and the resistance value is minimal. Otherwise, the blood flow in the anastomosis will be obstructed or even blocked, which will seriously affect the efficacy of the operation; ② The surgeon needs to ensure that the needle is inserted evenly and the needle distance is moderate during the suturing process. Otherwise, it will cause bleeding at the anastomosis, prolong the operation time, and increase the incidence of various complications. Due to the above-mentioned operational difficulties and possible risks, quality control of the operation is required during the operation. As far as the quality control process is concerned, anastomotic bleeding can be detected through direct observation, but for blood flow obstruction or anastomotic failure that may be caused by "difficulty ①", quality control must be achieved with the help of other instruments.

[0003] The essence of the above quality control process is to measure the blood flow in the anastomosed or repaired blood vessels. If the blood flow reaches the expected value, it means that the operation is successful. The blood flow is calculated by the flow velocity and the tube diameter. The flow velocity measurement process is highly mature and the measurement effect is stable. For the blood vessel diameter measurement technology, the blood vessel diameter measurement method currently widely used for surgical quality control is to estimate the blood vessel diameter through the fixed-size reflector on the ultrasonic flow probe. The specific method is: before measuring the flow, the blood vessel diameter is estimated by observation, and then the ultrasonic flow probe of the corresponding size is selected to experimentally measure the blood vessel diameter. If the experimental measurement finds that the blood vessel diameter matches the probe diameter well, the default blood vessel diameter is the corresponding probe diameter. After estimating the blood vessel diameter by the probe diameter, the blood flow velocity inside the blood vessel is measured by the probe, and the blood flow is calculated by the measured flow velocity and diameter. Since the existing blood vessel flow probe is a fixed-length clamping head, the probe with a suitable length clamping head needs to be frequently replaced during the measurement process. Moreover, after the replacement, the fixed-length clamping head of the probe is inaccurate when measuring blood vessels of different diameters, and there is a problem of looseness or tightness, which reduces the acoustic coupling coefficient of the probe during measurement. Therefore, the above blood vessel diameter measurement method has the problems of inaccurate measurement results and low measurement efficiency. Summary of the invention

[0004] The invention provides a blood vessel diameter measuring probe, which is used to solve the problems of inaccurate measurement results and low measurement efficiency in the existing blood vessel diameter measurement method.

[0005] The present invention provides a blood vessel diameter measuring probe, comprising:

[0006] Pedestal;

[0007] A reflective clamping head, wherein a clamping portion is formed at one end of the reflective clamping head, and the other end of the reflective clamping head is slidably matched with the base;

[0008] A driving assembly, connected to the base and the other end of the reflection clamping head respectively;

[0009] A potentiometer assembly, comprising a first conductive member and a second conductive member, wherein the first conductive member is disposed on the base and electrically connected to the ultrasonic blood vessel flow meter, the second conductive member is connected to the driving assembly, the second conductive member contacts the first conductive member, and the second conductive member is electrically connected to the ultrasonic blood vessel flow meter;

[0010] The driving assembly is used to drive the reflective clamping head to move relative to the base, and to drive the second conductive member to move relative to the first conductive member.

[0011] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, the driving component comprises:

[0012] A rotating shaft is rotatably matched with the base, a first end of the rotating shaft is formed with a tooth portion, and the other end of the reflective clamping head is provided with a rack, and the tooth portion is meshed with the rack.

[0013] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, a strip-shaped through hole is provided at the other end of the reflective clamping head, and the rack is provided on the hole wall of the strip-shaped through hole.

[0014] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, a knob is disposed at the second end of the rotating shaft.

[0015] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, the base includes:

[0016] The base body is provided with a mounting hole, the rotating shaft is rotatably mounted in the mounting hole, the first side of the base body is provided with a slide groove, the other end of the reflection clamping head is slidably mounted in the slide groove;

[0017] Two piezoelectric ceramics are symmetrically arranged at one end of the base body, and the two piezoelectric ceramics are electrically connected to the ultrasonic blood vessel flow meter respectively.

[0018] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, the base further includes:

[0019] A support member is disposed at one end of the base body and located between the two piezoelectric ceramics.

[0020] The shell is arranged around the outside of the base body.

[0021] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, the shell forms a limiting portion, and the limiting portion is located on the second side of the base body.

[0022] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, the first conductive member is a conductive ring, which is arranged on the second side of the base body and surrounds the outer circumference of the second end of the rotating shaft; the second conductive member is a conductive needle, which is arranged on the second end of the rotating shaft.

[0023] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, a groove is provided on the second side of the base body, a fixing block is embedded in the groove, and the first conductive member is provided on the fixing block.

[0024] The present invention also provides a blood vessel diameter measuring device, comprising an ultrasonic blood vessel flow measuring instrument and a blood vessel diameter measuring probe as described above.

[0025] The blood vessel diameter measuring probe provided by the embodiment of the present invention can freely adjust the distance between the clamping part and the base by driving the reflective clamping head to move relative to the base through the driving component, so that blood vessels of different diameters can be measured, avoiding multiple replacement of the measuring probe and improving the measurement efficiency; and the blood vessel and the clamping part can be better fitted, thereby improving the accuracy of the measurement result. The driving component drives the second conductive member to move relative to the first conductive member while driving the reflective clamping head to move relative to the base, so that the conductive circuit formed by the first conductive member, the second conductive member and the ultrasonic blood vessel flow meter outputs a voltage signal corresponding to the above distance, thereby realizing automatic measurement of the blood vessel diameter, avoiding errors caused by manual measurement, and further improving the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is one of the structural schematic diagrams of the blood vessel diameter measuring probe provided by an embodiment of the present invention without the housing installed;

[0028] Figure 2This is the second structural schematic diagram of the blood vessel diameter measuring probe provided by the embodiment of the present invention without the housing installed;

[0029] Figure 3 This is one of the schematic diagrams of the principle of measuring blood vessel diameter using a blood vessel diameter measuring probe provided in an embodiment of the present invention;

[0030] Figure 4 This is the second schematic diagram of the principle of measuring blood vessel diameter using the blood vessel diameter measuring probe provided in an embodiment of the present invention;

[0031] Figure 5 This is the third schematic diagram of the principle of measuring blood vessel diameter using the blood vessel diameter measuring probe provided in an embodiment of the present invention;

[0032] Figure 6 It is a schematic diagram of the exploded structure of the blood vessel diameter measuring probe provided in an embodiment of the present invention.

[0033] Reference numerals:

[0034] 110. Base body; 111. Slide groove; 112. Piezoelectric ceramic; 113. Wire; 114. Support member; 115. Shell; 116. Limiting portion; 117. Fixing block; 120. Reflection clamping head; 121. Clamping portion; 122. Strip-shaped through hole; 130. First conductive member; 131. Second conductive member; 140. Rotating shaft; 141. Tooth portion; 142. Rack; 143. Knob; 150. Blood vessel. DETAILED DESCRIPTION

[0035] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0038] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Combine the following Figure 1-Figure 6 A blood vessel diameter measuring probe according to an embodiment of the present invention is described. Figure 1 One of the structural schematic diagrams of the blood vessel diameter measuring probe provided by an embodiment of the present invention without the housing installed is illustrated, such as Figure 1As shown, the blood vessel diameter measuring probe includes a base, a reflection clamping head 120, a driving assembly and a potentiometer assembly. The base is used to provide a mounting base for the above components. A clamping portion 121 is formed at one end of the reflection clamping head 120, and the other end of the reflection clamping head 120 is slidably matched with the base. The driving assembly is connected to the base and the other end of the reflection clamping head 120 respectively. The potentiometer assembly includes a first conductive member 130 and a second conductive member 131. The first conductive member 130 is arranged on the base and is electrically connected to the ultrasonic blood vessel flow meter through a wire 113. The second conductive member 131 is connected to the driving assembly, and the second conductive member 131 contacts the first conductive member 130. The second conductive member 131 is electrically connected to the ultrasonic blood vessel flow meter through the wire 113. The driving assembly is used to drive the reflection clamping head 120 to move relative to the base, and the driving assembly is also used to drive the second conductive member 131 to move relative to the first conductive member 130.

[0041] The blood vessel diameter measuring probe provided in the embodiment of the present invention can freely adjust the distance between the clamping part 121 and the base by driving the reflective clamping head 120 to move relative to the base through the driving component, so that the distance between the clamping part 121 and the base can be measured. The blood vessels 150 of different diameters can be measured to avoid multiple replacement of the measuring probe, thereby improving the measurement efficiency; and the blood vessel 150 can be better fitted with the clamping part 121, thereby improving the accuracy of the measurement result. The driving component drives the second conductive member 131 to move relative to the first conductive member 130 while driving the reflective clamping head 120 to move relative to the base, so that the conductive circuit formed by the first conductive member 130, the second conductive member 131 and the ultrasonic blood vessel flow meter outputs a voltage signal corresponding to the above distance, thereby realizing the automatic measurement of the diameter of the blood vessel 150, avoiding the error caused by manual measurement, and further improving the accuracy of the measurement result.

[0042] Understandably, Figure 6 The exploded structure diagram of the blood vessel diameter measuring probe provided by the embodiment of the present invention is illustrated as follows: Figure 6 As shown, the driving assembly includes a rotating shaft 140, the rotating shaft 140 is rotatably matched with the base, a tooth portion 141 is formed at the first end of the rotating shaft 140, and a rack 142 is provided at the other end of the reflection clamping head 120, and the tooth portion 141 is meshed with the rack 142. When the rotating shaft 140 rotates, the rotating shaft 140 drives the reflection clamping head 120 to reciprocate along the first direction through the tooth portion 141 and the rack 142, and then adjusts the distance between the clamping portion 121 and the base, so that one measuring probe can measure blood vessels 150 of different diameters, ensures that the blood vessel 150 fits better with the clamping portion 121, and improves the accuracy of the measurement result. Of course, the driving assembly is not limited to the rotating shaft 140, and can also be a motor. When the driving assembly is a motor, the second conductive member 131 is arranged on the rotating shaft 140 of the motor, or is arranged on a transmission rod connected to the rotating shaft 140 of the motor.

[0043] It should be noted here that the first direction is Figure 1 The up and down directions in .

[0044] Understandably, Figure 2 The second structural schematic diagram of the blood vessel diameter measuring probe provided by the embodiment of the present invention without the housing installed is illustrated. Figure 3 One of the schematic diagrams of the principle of measuring the blood vessel diameter by the blood vessel diameter measuring probe provided in an embodiment of the present invention is illustrated, such as Figure 2 , Figure 3 and Figure 6 As shown, the reflection clamping head 120 is an L-shaped component, and the other end of the reflection clamping head 120 is provided with a strip through hole 122, and a rack 142 is provided on the hole wall of the strip through hole 122. The first end of the rotating shaft 140 is inserted into the strip through hole 122, and the tooth portion 141 of the first end of the rotating shaft 140 is meshed with the rack 142. The width of the strip through hole 122 matches the outer diameter of the first end of the rotating shaft 140. Inserting the first end of the rotating shaft 140 into the strip through hole 122 can limit the reflection clamping head 120, prevent the reflection clamping head 120 from shaking during the meshing process of the tooth portion 141 and the rack 142, ensure that the reflection clamping head 120 is more stable during the movement process, and further improve the accuracy of the measurement result. The strip through hole 122 is a rectangular strip through hole 122, and can also be an elliptical strip through hole 122. The rack 142 can be a separate component, or it can be integrally formed with the reflection clamping head 120.

[0045] It is understandable that a knob 143 is disposed at the second end of the rotating shaft 140 , and the knob 143 can increase the friction between the rotating shaft 140 and the fingers, making it easier to twist the second end of the rotating shaft 140 by hand.

[0046] It is understandable that if Figure 2 and Figure 6As shown, the base includes a base body 110 and two piezoelectric ceramics 112. The base body 110 is a block structure. A V-shaped mounting groove is formed at one end of the base body 110. The V-shaped mounting groove is used to accommodate the piezoelectric ceramics 112 and the support member 114. The base body 110 is provided with a mounting hole, which runs through both sides of the base body 110. The rotating shaft 140 is rotatably installed in the mounting hole. The first end of the rotating shaft 140 extends out of the first side of the base body 110, and the second end of the rotating shaft 140 extends out of the second side of the base body 110. A slide groove 111 is provided on the first side of the base body 110, and the other end of the reflection clamping head 120 is slidably installed in the slide groove 111. The two piezoelectric ceramics 112 are symmetrically arranged at one end of the base body 110, and the two piezoelectric ceramics 112 are respectively fixed on the two groove walls of the V-shaped mounting groove. The two piezoelectric ceramics 112 are electrically connected to the ultrasonic blood vessel flow meter through the wires 113 respectively. When one piezoelectric ceramic 112 emits a high-frequency pulse ultrasonic signal, the ultrasonic signal is reflected by the clamping part 121 of the reflection clamping head 120 and is received by the other piezoelectric ceramic 112. The blood vessel 150 flow meter calculates the blood flow velocity of the blood vessel 150 based on the time difference between the emission and reception of the high-frequency pulse ultrasonic signal, and combines the measured blood vessel 150 diameter data to further calculate the blood flow of the blood vessel 150.

[0047] Understandably, Figure 5 The third schematic diagram illustrates the principle of measuring the blood vessel diameter by the blood vessel diameter measuring probe provided in the embodiment of the present invention. Figure 5 As shown, the base also includes a support member 114 and a shell 115. The support member 114 is disposed at one end of the base body 110 and is located between the two piezoelectric ceramics 112. The support member 114 is used to cooperate with the clamping portion 121 of the reflection clamping head 120 to measure the diameter of the blood vessel 150. The side of the support member 114 facing the clamping portion 121 can be a flat surface or a curved surface that is concave inward. The curved surface can better fit the curved blood vessel 150, thereby improving the measurement accuracy of the diameter of the blood vessel 150 and the blood flow. The shell 115 is disposed outside the base body 110, and the shell 115 is used to protect the base.

[0048] It is understandable that if Figure 5 As shown, the housing 115 is formed with two limiting parts 116, the two limiting parts 116 are arc-shaped, the two limiting parts 116 are integrally formed with the housing 115, the limiting parts 116 are arranged opposite to the reflection clamping head 120, and the limiting parts 116 are located on the second side of the base body 110. The limiting parts 116 are used to limit the blood vessel 150 during the measurement process, to prevent the blood vessel 150 from slipping off between the clamping part 121 and the support member 114 during the process of measuring the diameter of the blood vessel 150, and to ensure that the maximum diameter of the blood vessel 150 is between the clamping part 121 and the support member 114.

[0049] It is understandable that the first conductive member 130 is a conductive ring, the conductive ring is made of metal, the conductive ring is in an arc shape with a gap, the conductive ring is arranged on the second side of the base body 110, and the conductive ring is arranged around the outer circumference of the second end of the rotating shaft 140. The second conductive member 131 is a conductive needle, and the conductive needle is arranged at the second end of the rotating shaft 140.

[0050] It can be understood that a groove is provided on the second side of the base body 110, a fixing block 117 is embedded in the groove, a through hole is provided on the fixing block 117, the second end of the rotating shaft 140 passes through the through hole, and the first conductive member 130 is provided on the side of the fixing block 117 away from the base body 110.

[0051] Figure 3 One of the schematic diagrams illustrating the principle of measuring the blood vessel diameter by the blood vessel diameter measuring probe provided in an embodiment of the present invention is illustrated. Figure 4 The second schematic diagram illustrates the principle of measuring the blood vessel diameter by the blood vessel diameter measuring probe provided in an embodiment of the present invention. Figure 3 and Figure 4 As shown, during the measurement process, a bias voltage from the ultrasonic blood vessel flow meter is applied between the conductive needle and the conductive ring, and the conductive needle, the conductive ring and the ultrasonic blood vessel flow meter form a conductive circuit of the potentiometer. When the rotating shaft 140 rotates, the conductive needle rotates with the rotating shaft 140. During the rotation process, the contact position between the conductive needle and the conductive ring changes, and the distance between the clamping part 121 and the support member 114 also changes. At this time, the output voltage value of the potentiometer in the conductive circuit changes, and the voltage value corresponds to the distance between the clamping part 121 and the support member 114. Therefore, the distance between the clamping part 121 and the support member 114 can be accurately calculated based on the voltage value collected by the ultrasonic blood vessel flow meter, and then the diameter of the blood vessel 150 can be calculated. For example, when the output voltage of the potentiometer is 5V, the distance between the clamping part 121 and the support 114 is 5mm, and the knob 143 is rotated so that the clamping part 121 and the support 114 are respectively attached to the blood vessel 150. At this time, the distance between the clamping part 121 and the support 114 is adjusted to 3mm, and the diameter of the measured blood vessel 150 is equal to the distance between the clamping part 121 and the support 114. The diameter of the blood vessel 150 is also 3mm, and the potentiometer voltage becomes 3V. Therefore, the flow meter of the blood vessel 150 reads the output value of the potentiometer, so that the diameter of the measured blood vessel 150 can be automatically identified. Then, the blood flow velocity inside the blood vessel 150 is measured by the probe, and the blood flow rate can be accurately calculated according to the measured flow velocity and the diameter of the blood vessel 150.

[0052] The present invention also provides a device for measuring the diameter of a blood vessel 150, comprising an ultrasonic blood vessel flow meter and a blood vessel diameter measuring probe as described in any one of the above embodiments.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A blood vessel diameter measuring probe, characterized in that: include: Base; the base includes a base body, the base body is provided with a mounting hole, A reflective clamping head, wherein a clamping portion is formed at one end of the reflective clamping head, and the other end of the reflective clamping head is slidably matched with the base; A driving assembly, connected to the base and the other end of the reflection clamping head respectively; A potentiometer assembly, comprising a first conductive member and a second conductive member, wherein the first conductive member is disposed on the base and electrically connected to the ultrasonic blood vessel flow meter, the second conductive member is connected to the driving assembly, the second conductive member contacts the first conductive member, and the second conductive member is electrically connected to the ultrasonic blood vessel flow meter; The driving assembly is used to drive the reflective clamping head to move relative to the base, thereby adjusting the distance between the clamping portion and the base, and driving the second conductive member to move relative to the first conductive member, so that the conductive circuit formed by the first conductive member, the second conductive member and the ultrasonic blood vessel flow meter outputs a voltage signal corresponding to the distance one by one; The drive assembly comprises: A rotating shaft, rotatably matched with the base, the rotating shaft is rotatably mounted in the mounting hole, a tooth portion is formed at a first end of the rotating shaft, a rack is provided at the other end of the reflective clamping head, and the tooth portion meshes with the rack; The first conductive member is a conductive ring, the material of the conductive ring is metal, the conductive ring is arc-shaped with a notch, the conductive ring is arranged on the second side of the base body, and the conductive ring is arranged around the outer circumference of the second end of the rotating shaft; the second conductive member is a conductive needle, and the conductive needle is arranged at the second end of the rotating shaft.

2. The blood vessel diameter measuring probe according to claim 1, characterized in that: The other end of the reflection clamping head is provided with a strip-shaped through hole, and the rack is arranged on the hole wall of the strip-shaped through hole.

3. The blood vessel diameter measuring probe according to claim 1, characterized in that: A knob is arranged at the second end of the rotating shaft.

4. The blood vessel diameter measuring probe according to claim 2 or 3, characterized in that: A slide groove is provided on the first side of the base body, and the other end of the reflection clamping head can be slidably installed in the slide groove; Two piezoelectric ceramics are symmetrically arranged at one end of the base body, and the two piezoelectric ceramics are electrically connected to the ultrasonic blood vessel flow meter respectively.

5. The blood vessel diameter measuring probe according to claim 4, characterized in that: The base also includes: A support member is disposed at one end of the base body and located between the two piezoelectric ceramics. The shell is arranged around the outside of the base body.

6. The blood vessel diameter measuring probe according to claim 5, characterized in that: The shell forms a limiting portion, and the limiting portion is located at the second side of the base body.

7. The blood vessel diameter measuring probe according to claim 4, characterized in that: A groove is provided on the second side of the base body, a fixing block is embedded in the groove, and the first conductive member is provided on the fixing block.

8. A blood vessel diameter measuring device, comprising an ultrasonic blood vessel flow measuring instrument, characterized in that: It also includes the blood vessel diameter measuring probe according to any one of claims 1 to 7.

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