阅读说明：本技术 盲视手术下血管神经探测仪及血管神经探测方法 (Vascular nerve detector and vascular nerve detection method under blind surgery ) 是由 杨留才 周羽 董安定 杨雅 于 2021-07-30 设计创作，主要内容包括：本发明公开了一种盲视手术下血管神经探测仪及血管神经探测方法,其中,探测仪包括：主机以及与主机连接的超声波血液流速探头和血氧饱和度探头；超声波血液流速探头用于检测术野内待测目标内的超声波信号；血氧饱和度探头用于检测术野内待测目标的光谱信号；待测目标包括动脉血管、静脉血管和神经；主机集成有主控板和显示屏,主控板用于：根据超声波血液流速探头检测的超声波信号计算待测目标内的血液流速并通过显示屏显示；根据血氧饱和度探头检测的光谱信号计算待测目标内的血氧饱和度并通过显示屏显示。实现在盲视手术下对神经、动脉、静脉血管的准确识别检测。(The invention discloses a vascular nerve detector and a vascular nerve detection method under blind surgery, wherein the detector comprises: the system comprises a host, and an ultrasonic blood flow velocity probe and an oxyhemoglobin saturation probe which are connected with the host; the ultrasonic blood flow velocity probe is used for detecting ultrasonic signals in a target to be detected in the surgical field; the oxyhemoglobin saturation probe is used for detecting a spectral signal of a target to be detected in the surgical field; the target to be detected comprises an artery blood vessel, a vein blood vessel and a nerve; host computer integration has main control board and display screen, and the main control board is used for: calculating the blood flow velocity in the target to be detected according to the ultrasonic signal detected by the ultrasonic blood flow velocity probe and displaying the blood flow velocity through a display screen; and calculating the blood oxygen saturation in the target to be detected according to the spectrum signal detected by the blood oxygen saturation probe and displaying the blood oxygen saturation through a display screen. The accurate identification and detection of nerves, arteries and veins under blind operation are realized.)

1. A vascular nerve detector under blind surgery, characterized by comprising: the system comprises a host, and an ultrasonic blood flow velocity probe and an oxyhemoglobin saturation probe which are connected with the host;

the ultrasonic blood flow velocity probe is used for detecting ultrasonic signals in a target to be detected in the surgical field;

the oxyhemoglobin saturation probe is used for detecting a spectral signal of a target to be detected in a surgical field;

the target to be detected comprises an artery blood vessel, a vein blood vessel and a nerve;

the host computer is integrated with main control board and display screen, the main control board is used for:

calculating the blood flow velocity in the target to be detected according to the ultrasonic signal detected by the ultrasonic blood flow velocity probe and displaying the blood flow velocity through the display screen;

and calculating the blood oxygen saturation in the target to be detected according to the spectrum signal detected by the blood oxygen saturation probe and displaying the blood oxygen saturation through the display screen.

2. The blind surgery blood vessel nerve detector according to claim 1, wherein the ultrasonic blood flow velocity probe is a single channel ultrasonic doppler blood flow velocity probe.

3. The apparatus according to claim 2, wherein the single-channel ultrasonic doppler blood flow velocity probe comprises an ultrasonic probe body, the front end of the ultrasonic probe body is provided with an inclined surface, the inclined surface is provided with a transducer, and the transducer is used as an ultrasonic signal transmitter and an ultrasonic signal receiver at the same time.

4. The blind surgery angio nerve detector of claim 3 wherein the transducer is made of a piezoelectric material, the transducer being used for conversion between electrical and acoustic signals.

5. The blind surgery inferior vascular nerve detector according to claim 1, wherein the blood oxygen saturation probe comprises a blood oxygen probe body, a pair of clamping jaws extending out of the blood oxygen probe body are arranged at the front end of the blood oxygen probe body, the pair of clamping jaws comprises a first clamping jaw and a second clamping jaw, the first clamping jaw and the second clamping jaw are parallel to each other, a red light emitter and an infrared light emitter are arranged on one side of the first clamping jaw opposite to the second clamping jaw, and a photoelectric sensor opposite to the red light emitter and the infrared light emitter is arranged on one side of the second clamping jaw opposite to the first clamping jaw.

6. The apparatus according to claim 5, wherein an elastic member or a distance adjusting mechanism is disposed between the first clamping jaw and the second clamping jaw.

7. The blind surgery inferior vascular nerve detector according to claim 1, wherein the main control board includes a first signal processing unit and a second signal processing unit integrated therewith;

the first signal processing unit is used for filtering and amplifying the ultrasonic signals collected by the ultrasonic blood flow velocity probe, converting the ultrasonic signals into digital signals and calculating the blood flow velocity value in the target to be detected;

the second signal processing unit is used for filtering and amplifying the spectrum signal detected by the blood oxygen saturation probe, converting the spectrum signal into a digital signal and calculating the blood oxygen saturation value in the target to be detected.

8. The apparatus according to claim 7, wherein the main control board further integrates a power interface, a first probe interface and a second probe interface;

the power interface is used for being connected with an external power supply;

the ultrasonic blood flow velocity probe is connected with the first signal processing unit through a first lead and the first probe interface;

the oxyhemoglobin saturation probe is connected with the second signal processing unit through a second lead and the second probe interface.

9. A vascular nerve detection method based on the vascular nerve detector under blind surgery according to any one of claims 1 to 8, comprising:

under blind operation, detecting an ultrasonic signal in a target to be detected in an operation field through the ultrasonic blood flow velocity probe, and calculating the blood flow velocity in the target to be detected based on the ultrasonic signal and displaying the blood flow velocity through a display screen by a main control board on the host;

if the displayed blood flow rate value is larger than the set blood flow rate value, judging that the target to be detected is a blood vessel, otherwise, judging that the target to be detected is a nerve;

detecting a spectrum signal of the target to be detected through the oxyhemoglobin saturation probe, and calculating oxyhemoglobin saturation in the target to be detected based on the spectrum signal and displaying the oxyhemoglobin saturation through the display screen by the main control board;

in the non-lung tissue, if the displayed blood oxygen saturation value is larger than the set blood oxygen saturation value, judging that the target to be detected is an arterial blood vessel, otherwise, judging that the target to be detected is a venous blood vessel;

in the lung tissue, if the displayed blood oxygen saturation value is larger than the set blood oxygen saturation value, the target to be detected is judged to be a vein blood vessel, otherwise, the target to be detected is judged to be an artery blood vessel.

Technical Field

The invention relates to the field of medical instruments, in particular to a vascular nerve detector and a vascular nerve detection method under blind surgery.

Background

In the surgical procedure, after accompanying blood vessels (artery and vein) and nerves are respectively dissociated, the accompanying blood vessels and the nerves are touched through sterile gloves through the experience of doctors, for example, the wall of the artery is thicker, the wall of the vein is thinner, and the toughness of the nerves is stronger, so that the accompanying blood vessels and the nerves are artificially judged. Particularly, in the small needle knife operation, the minimally invasive plastic operation and the like of the traditional Chinese medicine, the visualization of blood vessels and nerves can not be realized, so that the risk of the operation is further increased, and the judgment error often occurs, so that the blood vessels are injured by mistake to cause the phenomenon of heavy bleeding, and the operative field is seriously influenced; or damage to nerves, resulting in dysfunction of the patient, severely affecting the surgical procedure and the patient's post-operative recovery.

Disclosure of Invention

The invention aims to provide a vascular nerve detector and a vascular nerve detection method under blind surgery, which can accurately identify and detect nerves, arteries, veins and other blood vessels under blind surgery.

In order to achieve the above object, the present invention provides a blood vessel nerve detector under blind operation, comprising: the system comprises a host, and an ultrasonic blood flow velocity probe and an oxyhemoglobin saturation probe which are connected with the host;

the ultrasonic blood flow velocity probe is used for detecting ultrasonic signals in a target to be detected in the surgical field;

the oxyhemoglobin saturation probe is used for detecting a spectral signal of a target to be detected in a surgical field;

the target to be detected comprises an artery blood vessel, a vein blood vessel and a nerve;

the host computer is integrated with main control board and display screen, the main control board is used for:

calculating the blood flow velocity in the target to be detected according to the ultrasonic signal detected by the ultrasonic blood flow velocity probe and displaying the blood flow velocity through the display screen;

and calculating the blood oxygen saturation in the target to be detected according to the spectrum signal detected by the blood oxygen saturation probe and displaying the blood oxygen saturation through the display screen.

Optionally, the ultrasonic blood flow velocity probe is a single channel ultrasonic doppler blood flow velocity probe.

Optionally, the single-channel ultrasonic doppler blood flow velocity probe comprises an ultrasonic probe body, an inclined plane is arranged at the front end of the ultrasonic probe body, a converter is arranged on the inclined plane, and the converter is used as an ultrasonic signal transmitter and an ultrasonic signal receiver at the same time.

Optionally, the transducer is made of a piezoelectric material, the transducer being for conversion between electrical and acoustic signals.

Optionally, the oxyhemoglobin saturation probe includes a blood oxygen probe body, the front end of blood oxygen probe body is equipped with and extends a pair of clamping jaw of blood oxygen probe body, a pair of clamping jaw includes first clamping jaw and second clamping jaw, first clamping jaw with the second clamping jaw is parallel to each other, first clamping jaw with one side that the second clamping jaw is relative is equipped with ruddiness and infrared emitter, the second clamping jaw with one side that the first clamping jaw is relative be equipped with the relative photoelectric sensor of ruddiness and infrared emitter.

Optionally, an elastic member or a distance adjusting mechanism is arranged between the first clamping jaw and the second clamping jaw.

Optionally, the main control board includes a first signal processing unit and a second signal processing unit;

the first signal processing unit is used for filtering and amplifying the ultrasonic signals collected by the ultrasonic blood flow velocity probe, converting the ultrasonic signals into digital signals and calculating the blood flow velocity value in the target to be detected;

the second signal processing unit is used for filtering and amplifying the spectrum signal detected by the blood oxygen saturation probe, converting the spectrum signal into a digital signal and calculating the blood oxygen saturation value in the target to be detected.

Optionally, the main control board is further integrated with a power interface, a first probe interface and a second probe interface;

the power interface is used for being connected with an external power supply;

the ultrasonic blood flow velocity probe is connected with the first signal processing unit through a first lead and the first probe interface;

the oxyhemoglobin saturation probe is connected with the second signal processing unit through a second lead and the second probe interface.

The invention also provides a vascular nerve detection method based on the vascular nerve detector under blind operation, which comprises the following steps:

under blind operation, detecting an ultrasonic signal in a target to be detected in an operation field through the ultrasonic blood flow velocity probe, and calculating the blood flow velocity in the target to be detected based on the ultrasonic signal and displaying the blood flow velocity through a display screen by a main control board on the host;

if the displayed blood flow rate value is larger than the set blood flow rate value, judging that the target to be detected is a blood vessel, otherwise, judging that the target to be detected is a nerve;

detecting a spectrum signal of the target to be detected through the oxyhemoglobin saturation probe, and calculating oxyhemoglobin saturation in the target to be detected based on the spectrum signal and displaying the oxyhemoglobin saturation through the display screen by the main control board;

in the non-lung tissue, if the displayed blood oxygen saturation value is larger than the set blood oxygen saturation value, judging that the target to be detected is an arterial blood vessel, otherwise, judging that the target to be detected is a venous blood vessel;

in the lung tissue, if the displayed blood oxygen saturation value is larger than the set blood oxygen saturation value, the target to be detected is judged to be a vein blood vessel, otherwise, the target to be detected is judged to be an artery blood vessel.

The invention has the beneficial effects that:

the invention detects the ultrasonic signal in the target to be detected in the operative field through the ultrasonic blood flow velocity probe, calculates the blood flow velocity and displays the blood flow velocity after the ultrasonic signal is processed by the host, can identify whether the target to be detected in the blind operative field is a blood vessel or a nerve, detects the spectral signal of the target to be detected through the blood oxygen saturation probe, calculates the blood oxygen saturation and displays the blood oxygen saturation after the spectral signal is processed by the host, and can judge whether the blood vessel belongs to an artery blood vessel or a vein blood vessel based on the detected blood oxygen saturation value, thereby realizing the accurate identification and detection of the nerve blood vessel under the blind operative field.

The system of the present invention has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts.

Fig. 1 is a schematic structural diagram of a vascular nerve detector for blind surgery according to an embodiment of the invention.

Fig. 2 is a schematic structural diagram illustrating an ultrasonic blood flow velocity probe in a vascular nerve detector for blind surgery according to an embodiment of the present invention.

Fig. 3 shows a schematic structural diagram of a blood oxygen saturation probe in a vascular nerve detector under blind surgery according to an embodiment of the invention.

Description of reference numerals:

1-a host, 2-an ultrasonic blood flow velocity probe, 3-a blood oxygen saturation probe, 4-a display screen, 201-a converter, 301-a first clamping jaw, 302-a second clamping jaw, 303-a red light and infrared light emitter and 304-a photoelectric sensor.

Detailed Description

The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Fig. 1 is a schematic structural diagram of a vascular nerve detector for blind surgery according to an embodiment of the invention.

As shown in fig. 1, a vascular nerve detector for blind surgery includes: the device comprises a main machine 1, and an ultrasonic blood flow velocity probe 2 and a blood oxygen saturation probe 3 which are connected with the main machine 1;

the ultrasonic blood flow velocity probe 2 is used for detecting ultrasonic signals in a target to be detected in the surgical field;

the oxyhemoglobin saturation probe 3 is used for detecting a spectral signal of a target to be detected in the operative field;

the target to be detected comprises an artery blood vessel, a vein blood vessel and a nerve;

host computer 1 is integrated with main control board and display screen 4, and the main control board is used for:

calculating the blood flow velocity in the target to be detected according to the ultrasonic signal detected by the ultrasonic blood flow velocity probe 2 and displaying the blood flow velocity through the display screen 4;

the blood oxygen saturation in the target to be measured is calculated according to the spectrum signal detected by the blood oxygen saturation probe 3 and displayed through the display screen 4.

Specifically, an ultrasonic signal in a target to be detected in an operative field is detected through an ultrasonic blood flow velocity probe 2, blood flow velocity is calculated and displayed after the ultrasonic signal is processed through a host 1, because blood flows in a blood vessel, but the nerve is a closed tissue, and no blood flows in the nerve, whether the blood flows in the target to be detected can be judged based on the detected blood flow velocity value, so that whether the target to be detected in the operative field is the blood vessel or the nerve can be identified, when the blood vessel is an artery or a vein vessel needs to be distinguished, a spectrum signal of the target to be detected is detected through a blood oxygen saturation probe 3, the blood oxygen saturation is calculated and displayed after the spectrum signal processing is carried out through the host 1, because the blood oxygen content in the artery blood vessel is higher, the blood oxygen content in the vein is lower, and therefore, whether the blood vessel belongs to the artery or the vein can be judged based on the detected blood oxygen saturation value, therefore, accurate identification and detection of the neurovascular system under blind surgery are realized.

In this embodiment, the ultrasonic blood flow velocity probe 2 is a single-channel ultrasonic doppler blood flow velocity probe. The single-channel ultrasonic Doppler blood flow velocity probe comprises an ultrasonic probe body, wherein an inclined plane is arranged at the front end of the ultrasonic probe body, a converter 201 is arranged on the inclined plane, and the converter 201 is used as an ultrasonic signal transmitter and an ultrasonic signal receiver simultaneously. The transducer 201 is made of a piezoelectric material, and the transducer 201 is used for conversion between an electric signal and an acoustic wave signal.

Specifically, the doppler blood flow velocity probe based on ultrasonic wave is a prior art, and in this embodiment, a single-channel doppler blood flow velocity probe is adopted, as shown in fig. 2, a bevel is provided at the front end of the ultrasonic probe body, a transducer 201 is provided on the bevel, and the transducer 201 serves as both an ultrasonic signal transmitter and an ultrasonic signal receiver. The transducer 201 is made of piezoelectric material, the surface of the transducer 201 is flush with the inclined plane, and the transducer 201 can convert an electric signal into an ultrasonic signal, transmit the ultrasonic signal into a blood vessel or a nerve and receive a reflected sound wave signal.

During detection, the inclined surface of the ultrasonic blood flow velocity probe 2 needs to be attached to the outer wall of a blood vessel or a nerve, so that an included angle between the ultrasonic wave emitted by the transducer 201 and the blood flow direction is 30-60 degrees. The frequency of the ultrasonic wave is preferably between 1.5-10MHz, the transducer 201 sends sound pulse signals at intervals, receives the sound pulse signals reflected from the blood vessel wall and the red blood cells in the blood vessel at the time of the interval of two sound pulses, selects the red blood cell reflected signals at a given distance by using a control circuit, and obtains Doppler frequency shift which is proportional to the blood flow rate after comparison. The method for calculating the blood flow velocity based on the doppler shift is well known in the art and can be easily implemented by those skilled in the art, and will not be described herein.

In this embodiment, the blood oxygen saturation probe 3 includes a blood oxygen probe body, a pair of clamping jaws extending out of the blood oxygen probe body is disposed at the front end of the blood oxygen probe body, the pair of clamping jaws includes a first clamping jaw 301 and a second clamping jaw 302, the first clamping jaw 301 and the second clamping jaw 302 are parallel to each other, a red light and infrared light emitter 303 is disposed at one side of the first clamping jaw 301 opposite to the second clamping jaw 302, and a photoelectric sensor 304 opposite to the red light and infrared light emitter 303 is disposed at one side of the second clamping jaw 302 opposite to the first clamping jaw 301. Wherein an elastic member or a distance adjusting mechanism (not shown) is provided between the first clamping jaw 301 and the second clamping jaw 302.

Specifically, the technical principle of the oxyhemoglobin saturation probe 3 is that the oxyhemoglobin saturation probe is available, in order to facilitate blind operation, a pair of parallel and spaced blood oxygen detecting heads in the form of clamping jaws is adopted in the application, a red light and infrared light emitter 303 is arranged on the inner side of one clamping jaw, a photoelectric sensor 304 is arranged at the opposite position of the inner side of the other clamping jaw, and an elastic member or a distance adjusting member, such as a tension spring or a distance adjusting bolt, is arranged between the two clamping jaws. Wherein the photosensor 304 comprises a photodiode. When the blood vessel is detected, the two clamping jaws are clamped at two sides of the blood vessel, the red light and infrared light emitter 303 on one clamping jaw emits red light and infrared light, the red light and the infrared light are received by the photoelectric sensor 304 on the other clamping jaw after penetrating through the blood vessel, and the photoelectric sensor 304 uploads received spectrum signals of the red light and the infrared light to the main control board to calculate the blood oxygen content value.

The specific principle is as follows: high oxygen content in arterial blood and low oxygen content in venous blood. And the oxygen content is determined by the oxygen saturation of blood (SpO)₂) To represent the representation. Blood oxygen saturation (SpO)₂) Is the volume of oxygenated hemoglobin (HbO2) bound by oxygen in the blood as a percentage of the total available hemoglobin (Hb) volume, i.e., the concentration of blood oxygen in the blood, which is an important physiological parameter of the respiratory cycle. Oxygen saturation of HbO₂Concentration and HbO₂Ratio of the middle Hb concentration. The oxyhemoglobin saturation probe 3 is based on oxyhemoglobin (HbO)₂) And the spectral characteristics of reduced hemoglobin (Hb) in red and infrared light regions, i.e., HbO in a red light region (600-700 nm)₂And Hb, the degree of light absorption and scattering of blood is highly dependent on the blood oxygen saturation; in the infrared spectral region (800-1000 nm), the absorption difference is large, and the light absorption degree and the light scattering degree of blood are mainly related to the hemoglobin content, so that HbO₂And Hb, in which the ratio of the reflection of blood at wavelengths around 660nm and 900nm (ρ 660/900) most sensitively reflects the change in blood oxygen saturation. Therefore, whether the blood vessel detected by the oxyhemoglobin saturation probe 3 is arterial blood or venous blood, the main control board can be based on HbO₂And the content of Hb accurately reflects the blood oxygen saturation.

It should be noted that the specific calculation method of blood oxygen saturation is the prior art, and is easy to be implemented by those skilled in the art, and will not be described herein again.

In this embodiment, the main control board includes a first signal processing unit and a second signal processing unit;

the first signal processing unit is used for filtering and amplifying the ultrasonic signals collected by the ultrasonic blood flow velocity probe 2, converting the ultrasonic signals into digital signals and calculating the blood flow velocity value in the target to be measured;

the second signal processing unit is used for filtering and amplifying the spectrum signal detected by the blood oxygen saturation probe 3, converting the spectrum signal into a digital signal and calculating the blood oxygen saturation value in the target to be detected.

Specifically, the ultrasonic blood flow rate probe 2 of the present embodiment is consistent with the principle of the existing ultrasonic blood flow rate (or flow) detector, and the blood oxygen saturation probe 3 is consistent with the principle of the existing blood oxygen saturation detector, so that substantially the same circuit devices are integrated on the main control board of the host 1, wherein the first signal processing unit may include a circuit for processing an ultrasonic signal and a noise reduction signal, a filter circuit, a signal amplification circuit, and a DSP signal processing module. Wherein, the circuit for processing the ultrasonic signal and the noise reduction signal is connected with the input end of the ultrasonic receiver and the ultrasonic receiver. The output of the circuit for processing the ultrasonic signals and the noise reduction signals is connected with the input of the filter circuit, the output of the filter circuit is connected with the input of the signal amplification circuit, the output of the signal amplification circuit is connected with the DSP signal processing module, and meanwhile, the DSP signal processing module can also control the ultrasonic generator (transducer) to emit ultrasonic waves. The second signal processing unit can comprise a transmitting circuit, a photoelectric detection circuit, a filtering amplification circuit and an MCU (microprogrammed control unit) with an analog-digital conversion function, wherein the red light and infrared light transmitter 303, the transmitting circuit and the MCU are sequentially connected, the photoelectric sensor 304, the photoelectric detection circuit, the filtering amplification circuit and the MCU are sequentially connected, the MCU controls the transmitting circuit to alternately light red light (660nm) and infrared light (940nm) to project through a blood vessel, the photoelectric sensor 304 receives attenuated red light and infrared light, the red light and infrared light are subjected to photoelectric conversion through the photoelectric detection circuit, the red light and infrared light are subjected to A/D conversion through the filtering amplification circuit, and the MCU performs calculation of the ratio of red light alternating current and direct current signals, the ratio of infrared light alternating current and direct current signals and the ratio of blood oxygen saturation in each period.

In this embodiment, the main control board is further integrated with a power interface, a first probe interface and a second probe interface; the power interface is used for being connected with an external power supply; the ultrasonic blood flow velocity probe 2 is connected with the first signal processing unit through a first lead and a first probe interface; the oxyhemoglobin saturation probe 3 is connected with the second signal processing unit through a second lead and a second probe interface.

In the present application, the components that can contact the body tissue in the surgical field, such as the ultrasonic blood flow rate probe 2, the blood oxygen saturation probe 3, the first lead, and the second lead, need to be made of non-contaminating materials.

The embodiment of the invention also provides a vascular nerve detection method based on the vascular nerve detector under blind surgery, which comprises the following steps:

under blind operation, detecting an ultrasonic signal in a target to be detected in an operation field through an ultrasonic blood flow velocity probe 2, calculating the blood flow velocity in the target to be detected based on the ultrasonic signal by a main control board on a host 1, and displaying the blood flow velocity through a display screen 4;

if the displayed blood flow rate value is larger than the set blood flow rate value, judging that the target to be detected is a blood vessel, otherwise, judging that the target to be detected is a nerve;

detecting a spectrum signal of a target to be detected through a blood oxygen saturation probe 3, calculating the blood oxygen saturation in the target to be detected based on the spectrum signal by a main control board, and displaying the blood oxygen saturation through a display screen 4;

in the non-lung tissue, if the displayed blood oxygen saturation value is larger than the set blood oxygen saturation value, judging that the target to be detected is an arterial blood vessel, otherwise, judging that the target to be detected is a venous blood vessel;

in the lung tissue, if the displayed blood oxygen saturation value is larger than the set blood oxygen saturation value, the target to be detected is judged to be a vein blood vessel, otherwise, the target to be detected is judged to be an artery blood vessel.

When distinguishing blood vessels from nerves, the inclined plane of the ultrasonic blood flow velocity probe 2 needs to be attached to the outer wall of the blood vessels or nerves, so that an included angle between the ultrasonic waves emitted by the transducer 201 and the blood flow direction is 30-60 degrees. The frequency of the ultrasonic wave is preferably between 1.5 and 10MHz, the transducer 201 sends acoustic pulse signals at intervals, receives the acoustic pulse signals reflected from the blood vessel wall and the red blood cells in the blood vessel at the interval time of the two acoustic pulses, selects the red blood cell reflected signals at a given distance by adopting a control circuit, obtains Doppler frequency shift after comparison, further detects the blood flow velocity, for example, if the blood flow velocity is 0, the nerve is judged, and if the blood flow velocity is more than 0 and basically consistent with the known blood flow velocity of the blood vessel, the target to be detected can be judged to be the blood vessel.

When artery blood vessels and vein blood vessels are distinguished, the two clamping jaws of the blood oxygen saturation probe 3 are clamped on two sides of the blood vessels, the red light and infrared light emitter 303 on one clamping jaw emits red light and infrared light, the red light and the infrared light are received by the photoelectric sensor 304 on the other clamping jaw after penetrating through the blood vessels, and the photoelectric sensor 304 uploads received spectrum signals of the red light and the infrared light to the main control board to calculate the blood oxygen saturation value. The blood oxygen saturation level of the venous blood vessels is generally lower than 70%, the blood oxygen saturation level of the arterial blood vessels is generally higher than 90%, 80% can be selected as the set blood oxygen saturation value, and in the lung tissue, the opposite is true.

In conclusion, the invention realizes accurate identification and detection of nerves and arteriovenous vessels under blind operation, and effectively avoids operation risks caused by artificial identification errors under blind operation.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.