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 blood vessel diameter measuring probe includes a base, a reflection clamping head, a driving component and an adjustable capacitor. A clamping part 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 respectively connected to the base and the other end of the reflection clamping head; the adjustable capacitor is electrically connected to an ultrasonic blood vessel flow meter, and the adjustment needle of the adjustable capacitor is connected to the driving component; the driving component is used to drive the reflection clamping head to move relative to the base, and drive the adjustment needle to move, so as to change the capacitance value of the adjustable capacitor. The reflection clamping head is driven by the driving component to move relative to the base, and the distance between the clamping part 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 part 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] An adjustable capacitor is electrically connected to the ultrasonic blood vessel flow meter, and an adjustment needle of the adjustable capacitor is connected to the driving component;

[0010] The driving assembly is used to drive the reflection clamping head to move relative to the base, and to drive the adjustment needle to move, so as to change the capacitance of the adjustable capacitor.

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

[0012] A base body, wherein a first side of the base body is provided with a slide groove, and the other end of the reflection clamping head is slidably installed in the slide groove;

[0013] 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.

[0014] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, the base further includes:

[0015] A support member is disposed at one end of the base body and is located between the two piezoelectric ceramics.

[0016] The shell is arranged around the outside of the base body.

[0017] 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.

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

[0019] A positioning shaft, a mounting hole is arranged in the slide groove, one end of the positioning shaft is inserted into the mounting hole, and the other end of the reflective clamping head is provided with a strip through hole, the other end of the positioning shaft is inserted into the strip through hole and slidably cooperates with the strip through hole.

[0020] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, the driving component comprises:

[0021] A handle having a first cavity formed therein;

[0022] A driving motor is disposed in the first cavity;

[0023] A first sleeve, one end of which is rotatably matched with the handle and connected to the rotating shaft of the driving motor, and the adjustable capacitor is arranged in the first sleeve;

[0024] A second sleeve, one end of the second sleeve is rotatably matched with the other end of the first sleeve, and the other end of the second sleeve is connected to the base body; a screw is provided at the other end of the reflection clamping head, and the end of the screw away from the reflection clamping head passes through the second sleeve and is connected to the adjustment needle of the adjustable capacitor, and the outer peripheral surface of the end of the screw away from the reflection clamping head is threadedly matched with the other end of the first sleeve.

[0025] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, a limiting step is formed at one end of the first sleeve, and the limiting step is rotatably embedded in the first cavity.

[0026] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, an annular protrusion is formed inside the other end of the first sleeve, the inner wall of the annular protrusion is provided with a thread, and the outer peripheral surface of the end of the screw rod away from the reflection clamping head is matched with the annular protrusion thread.

[0027] According to a blood vessel diameter measuring probe provided by an embodiment of the present invention, the other end of the base body is provided with a plug hole, and the other end of the second sleeve is plugged into the plug hole.

[0028] 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.

[0029] 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 adjustment needle of the adjustable capacitor to move while driving the reflective clamping head to move relative to the base, so that the capacitance of the adjustable capacitor changes, so that the conductive circuit formed by the adjustable capacitor 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

[0030] 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.

[0031] Figure 1 is a schematic cross-sectional structure diagram of a blood vessel diameter measuring probe provided by an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of the three-dimensional structure of a blood vessel diameter measuring probe provided by an embodiment of the present invention;

[0033] Figure 3 It is a schematic diagram of the exploded structure of the blood vessel diameter measuring probe provided in an embodiment of the present invention.

[0034] Reference numerals:

[0035] 110. Base body; 111. Slide groove; 112. Piezoelectric ceramic; 113. Support member; 114. Shell; 115. Positioning shaft; 120. Reflection clamping head; 121. Clamping part; 122. Strip through hole; 130. Adjustable capacitor; 131. Adjustment needle; 140. Handle; 141. Drive motor; 142. First sleeve; 143. Second sleeve; 144. Screw; 145. Limit step; 146. Annular protrusion; 150. Blood vessel. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Combine the following Figure 1-Figure 3 A blood vessel diameter measuring probe according to an embodiment of the present invention is described. Figure 1 The cross-sectional structure diagram of the blood vessel diameter measuring probe provided by the embodiment of the present invention is illustrated. Figure 2 The three-dimensional structure diagram of the blood vessel diameter measuring probe provided by the embodiment of the present invention is illustrated. Figure 3 The exploded structure diagram of the blood vessel diameter measuring probe provided by the embodiment of the present invention is illustrated as follows: Figure 1 , Figure 2 and Figure 3As shown, the blood vessel diameter measuring probe includes a base, a reflection clamping head 120, a driving assembly and an adjustable capacitor 130. 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. 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 adjustable capacitor 130 is electrically connected to the ultrasonic blood vessel flow meter, and the adjustment needle 131 of the adjustable capacitor 130 is connected to the driving assembly. The driving assembly is used to drive the reflection clamping head 120 to move relative to the base, and drive the adjustment needle 131 to move, so as to change the capacitance value of the adjustable capacitor 130.

[0042] The blood vessel diameter measuring probe provided by 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 adjusted, which can measure blood vessels 150 of different diameters, avoid multiple replacement of the measuring probe, and improve the measurement efficiency; and can make the blood vessel 150 fit better with the clamping part 121, thereby improving the accuracy of the measurement result. The driving component drives the adjustment needle 131 of the adjustable capacitor 130 to move while driving the reflective clamping head 120 to move relative to the base, so that the capacitance of the adjustable capacitor 130 changes, so that the conductive circuit formed by the adjustable capacitor 130 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 errors caused by manual measurement, and further improving the accuracy of the measurement result.

[0043] It is understandable that if Figure 1 , Figure 2 and Figure 3 As 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, and the mounting hole runs through both sides of the base body 110. A slide groove 111 is provided on the first side of the base body 110. The other end of the reflection clamping head 120 can be 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.

[0044] It is understandable that if Figure 1 and Figure 3 As shown, the base also includes a support member and a shell 115. The support member is arranged at one end of the base body and is located between two piezoelectric ceramics. The support member 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 facing the clamping portion 121 can be a flat surface or a curved surface 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 arranged outside the base body, and the shell 115 is used to protect the base.

[0045] It is understandable that if Figure 1 and Figure 3 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. 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 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.

[0046] It is understandable that if Figure 1 and Figure 3 As shown, the base also includes a positioning shaft 117, which is used to cooperate with the slide groove 111 to guide the reflection clamping head 120, so that the reflection clamping head 120 can only reciprocate along the first direction within a predetermined range, and the size of the predetermined range is determined according to the length of the strip through hole 122. A mounting hole is provided in the slide groove 111, and one end of the positioning shaft 117 is inserted into the mounting hole, and the mounting hole is located at the center of the slide groove 111. In addition to the plug-in connection, the positioning shaft 117 and the mounting hole can also be threadedly connected, and of course, it can also be integrally formed with the base body 110.

[0047] It should be noted here that the mounting hole is set on the base body 110, and the mounting hole is a circular hole. The corresponding cross-section of the positioning shaft 117 is circular. Of course, the mounting hole can also be a circular hole, and correspondingly, the cross-section of the positioning shaft 117 is square.

[0048] The reflection clamping head 120 is an L-shaped component, and a bar-shaped through hole 122 is provided at the other end of the reflection clamping head 120. The other end of the positioning shaft 117 is inserted into the bar-shaped through hole 122 and slidably cooperates with the bar-shaped through hole 122. The diameter of the positioning shaft 117 is smaller than the width of the bar-shaped through hole 122, and the positioning shaft 117 fits tightly with the inner wall of the bar-shaped through hole 122 to prevent the reflection clamping head 120 from shaking during the movement along the first direction, thereby affecting the measurement accuracy.

[0049] It is understandable that if Figure 1 and Figure 3 As shown, the other end of the positioning shaft 117 extends radially outward to form a disc-shaped limiting protrusion (not shown), the diameter of the limiting protrusion is greater than the width of the strip-shaped through hole 122, and the limiting protrusion is slidably matched with the other end of the reflection clamping head 120 away from the base body 110. Due to the limiting protrusion, the reflection clamping head 120 can be prevented from moving along the second direction, thereby causing the reflection clamping head 120 to vibrate along the second direction.

[0050] It should be noted here that the first direction is Figure 1 The up and down directions in the second direction are Figure 1 In the front-to-back direction, the first direction is perpendicular to the second direction.

[0051] It is understandable that if Figure 3 As shown, the drive assembly includes a handle 140, a drive motor 141, a first sleeve 142 and a second sleeve 143. The handle 140 can be held by the physician by hand. The handle 140 is a rod-shaped structure. A first cavity is formed inside the handle 140. The first cavity is used to install the drive motor 141. The drive motor 141 is arranged in the first cavity. The drive motor 141 can be a motor or a combination of a motor and a reduction gear. The housing 115 of the motor is connected to the inner wall of the first cavity. The motor is preferably a micro motor to reduce the size of the handle 140 so that the physician is more comfortable during the holding process.

[0052] The first sleeve 142 is a hollow tubular structure. The outer diameter of one end of the first sleeve 142 is the same as the outer diameter of the end of the handle 140 close to the first sleeve 142, and the outer diameter of the other end of the first sleeve 142 is the same as the outer diameter of one end of the second sleeve 143, so as to achieve a smooth transition from the first sleeve 142 to the second sleeve 143 and from the first sleeve 142 to the handle 140, so as to enhance the comfort of the physician during the holding process and enhance the aesthetics of the blood vessel diameter measuring probe. The axis of the first sleeve 142 is in the same straight line as the axis of the handle 140 and the axis of the drive motor 141, so that the rotation process of the first sleeve 142 is more stable. One end of the first sleeve 142 is rotatably matched with the handle 140, and one end of the first sleeve 142 is set in the socket, and the rotating shaft of the drive motor 141 is plug-connected with the socket.

[0053] It should be noted here that the installation relationship between the first sleeve 142 and the handle 140 is not limited to the above-mentioned connection relationship. When the outer diameter of the first sleeve 142 is small, the first sleeve 142 can be rotatably disposed in the handle 140, and one end of the second sleeve 143 can be connected to the handle 140.

[0054] The adjustable capacitor 130 is disposed in the first sleeve 142 , and the adjusting needle 131 is inserted into the adjustable capacitor 130 . By changing the length of the adjusting needle 131 inserted into the adjustable capacitor 130 , the capacitance of the adjustable capacitor 130 can be changed.

[0055] The second sleeve 143 is a hollow tubular structure. One end of the second sleeve 143 is rotatably matched with the other end of the first sleeve 142. The second sleeve 143 is used for the doctor to hold, that is, the second sleeve 143 does not rotate during the rotation of the first sleeve 142. The other end of the second sleeve 143 is connected to the other end of the base body 110. The connection between the second sleeve 143 and the base can be in the following three forms:

[0056] In the first method, a socket is disposed at the other end of the base body 110 , and the other end of the second sleeve 143 is inserted into the socket.

[0057] In a second embodiment, a threaded hole is provided at the other end of the base body 110 , a thread is provided at the other end of the second sleeve 143 , and the other end of the second sleeve 143 is threadedly matched with the threaded hole.

[0058] In a third embodiment, the other end of the second sleeve 143 is integrally formed with the other end of the base body 110 .

[0059] The other end of the reflection clamping head 120 is provided with a screw rod 144, and the screw rod 144 and the reflection clamping head 120 can be connected by welding or integrally formed. The end of the screw rod 144 away from the reflection clamping head 120 passes through the second sleeve 143 and is connected to the adjustment needle 131 of the adjustable capacitor 130, and the axis of the screw rod 144 is in the same straight line as the axis of the first sleeve 142. The outer peripheral surface of the end of the screw rod 144 away from the reflection clamping head 120 and the other end of the first sleeve 142 can be threadedly matched in the following two ways:

[0060] In one embodiment, an annular protrusion 146 is formed inside the other end of the first sleeve 142 , and a thread is provided on the inner wall of the annular protrusion 146 . The outer peripheral surface of the end of the screw rod 144 away from the reflection clamping head 120 is threadedly matched with the annular protrusion 146 .

[0061] In a second method, a nut is embedded in the other end of the first sleeve 142 , and the outer peripheral surface of the end of the screw rod 144 away from the reflection clamping head 120 is matched with the nut thread.

[0062] When in use, the doctor holds the handle 140 and the second sleeve 143 by hand at the same time. When the rotating shaft of the driving motor 141 drives the first sleeve 142 to rotate forward, the outer peripheral surface of the screw rod 144 away from the end of the reflection clamping head 120 is threadedly matched with the other end of the first sleeve 142, and the screw rod 144 drives the reflection clamping head 120 to move away from the base; when the rotating shaft of the driving motor 141 drives the first sleeve 142 to rotate in the opposite direction, the screw rod 144 drives the reflection clamping head 120 to move toward the base. Then, the distance between the clamping part 121 and the base is adjusted, so that one measuring probe can measure blood vessels 150 of different diameters, ensuring better fit between the blood vessel 150 and the clamping part 121, and improving the accuracy of the measurement results.

[0063] It is understandable that if Figure 3 As shown, a limiting step 145 is formed at one end of the first sleeve 142, and the jack of the first sleeve 142 is arranged on the limiting step 145, and the limiting step 145 is rotatably embedded in the first cavity. Since the end face of one end of the first sleeve 142 contacts and is not connected to the end face of the handle 140 close to one end of the first sleeve 142, when the first sleeve 142 is subjected to a large radial force, the shaft of the drive motor 141 is prone to bend, and the first sleeve and the handle 140 are prone to vibration, which affects the measurement accuracy. Therefore, a limiting step 145 is arranged at one end of the first sleeve 142, and the limiting step 145 can limit the first sleeve 142 in the radial direction, prevent the shaft of the drive motor 141 from bending, and improve the stability of the first sleeve 142 during rotation.

[0064] like Figure 1 and Figure 3As shown, during the measurement process, the adjustable capacitor 130 applies a bias voltage from the ultrasonic blood vessel flow meter, and the adjustable capacitor 130 and the ultrasonic blood vessel flow meter form a conductive circuit of the potentiometer. When the rotating shaft of the driving motor 141 drives the first sleeve 142 to rotate, the screw rod 144 is away from the threaded engagement of one end of the reflection clamping head 120 in the first sleeve 142, and the screw rod 144 drives the reflection clamping head 120 to reciprocate along the first direction. At the same time, the screw rod 144 drives the adjustment needle 131 to move up and down, and during the vertical movement, the capacitance change of the adjustable capacitor 130 causes the voltage to change, and the distance between the clamping part 121 and the support member 114 also changes accordingly. 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 one by one. 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.

[0065] 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.

[0066] 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: Pedestal; 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; An adjustable capacitor is electrically connected to the ultrasonic blood vessel flow meter, and an adjustment needle of the adjustable capacitor is connected to the driving component; The driving assembly is used to drive the reflection clamping head to move relative to the base, and drive the adjustment needle to move, so as to change the capacitance of the adjustable capacitor; The base comprises: A base body, wherein a first side of the base body is provided with a slide groove, and the other end of the reflection clamping head is slidably installed in the slide groove; Two piezoelectric ceramics, the 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; A support member is disposed at one end of the base body and located between the two piezoelectric ceramics. A shell, arranged around the outside of the base body; The drive assembly comprises: A handle having a first cavity formed therein; A driving motor is disposed in the first cavity; A first sleeve, one end of which is rotatably matched with the handle and connected to the rotating shaft of the driving motor, and the adjustable capacitor is arranged in the first sleeve; A second sleeve, one end of the second sleeve is rotatably matched with the other end of the first sleeve, and the other end of the second sleeve is connected to the base body; a screw is provided at the other end of the reflection clamping head, and the end of the screw away from the reflection clamping head passes through the second sleeve and is connected to the adjustment needle of the adjustable capacitor, and the outer peripheral surface of the end of the screw away from the reflection clamping head is threadedly matched with the other end of the first sleeve; When the rotating shaft of the driving motor drives the first sleeve to rotate in the forward direction, since the outer peripheral surface of the end of the screw rod away from the reflection clamping head is threadedly matched with the other end of the first sleeve, the screw rod drives the reflection clamping head to move in the direction away from the base; when the rotating shaft of the driving motor drives the first sleeve to rotate in the reverse direction, the screw rod drives the reflection clamping head to move in the direction close to the base, thereby adjusting the distance between the clamping part and the base, so that one measuring probe can measure blood vessels of different diameters, ensuring better fit between the blood vessel and the clamping part; During the measurement process, the adjustable capacitor applies a bias voltage from the ultrasonic vascular flow meter, and the adjustable capacitor and the ultrasonic vascular flow meter constitute a conductive circuit of the potentiometer. When the shaft of the driving motor drives the first sleeve to rotate, the end of the lead screw away from the reflection clamping head cooperates with the thread of the first sleeve, and the lead screw drives the reflection clamping head to reciprocate along the first direction; at the same time, the lead screw drives the adjustment needle to move up and down, and during the vertical movement, the capacitance of the adjustable capacitor changes, causing the voltage to change, and the distance between the clamping part and the support member also changes accordingly. At this time, the output voltage value of the potentiometer in the conductive circuit changes, and the voltage value corresponds one-to-one to the distance between the clamping part and the support member.

2. The blood vessel diameter measuring probe according to claim 1, characterized in that: The shell forms a limiting portion, and the limiting portion is located at the second side of the base body.

3. The blood vessel diameter measuring probe according to claim 2, characterized in that: The base also includes: A positioning shaft, a mounting hole is arranged in the slide groove, one end of the positioning shaft is inserted into the mounting hole, and the other end of the reflective clamping head is provided with a strip through hole, the other end of the positioning shaft is inserted into the strip through hole and slidably cooperates with the strip through hole.

4. The blood vessel diameter measuring probe according to claim 3, characterized in that: A limiting step is formed at one end of the first sleeve, and the limiting step is rotatably embedded in the first cavity.

5. The blood vessel diameter measuring probe according to claim 3, characterized in that: An annular protrusion is formed inside the other end of the first sleeve, and a thread is provided on the inner wall of the annular protrusion. The outer peripheral surface of the end of the screw rod away from the reflection clamping head is threadedly matched with the annular protrusion.

6. The blood vessel diameter measuring probe according to claim 3, characterized in that: The other end of the base body is provided with a plug hole, and the other end of the second sleeve is plugged into the plug hole.

7. 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 6.

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