CN107496002B - A radial artery hemostat - Google Patents

Abstract

The present invention proposes a radial artery hemostat, comprising: a compression part, a wrist strap and a control box; the compression part includes a pressing plate and a square air bag for compressing the incision site; the wrist strap includes an outer interlayer and an air bag arranged in the interlayer The belt is used to fix the pressing part at the incision position; the control box includes a first adjustment part and a second adjustment part, the first adjustment part controls the inflation and deflation of the airbag belt, and the second adjustment part controls the inflation and deflation of the square airbag. The radial artery hemostat of the present invention can realize the preliminary adjustment of the pressure plate, the alignment is accurate, and it is convenient to wear; it can realize the fine adjustment of the compression force of the compression part to the incision according to the wrist posture, and realizes the automatic adjustment of the compression force during the wearing process; The bleeding area adjusts the compressing force of the compressing part on the incision, realizing further fine adjustment of the compressing force of the incision.

Description

A radial artery hemostat

technical field

The invention relates to the field of medical instruments, in particular to a radial artery hemostat.

Background technique

With the improvement of living conditions and the change of working style, the incidence of coronary heart disease is increasing year by year. Percutaneous transluminal coronary angioplasty is the main method for the treatment of coronary heart disease.

At present, radial artery puncture is often used clinically, and doctors need to use a hemostat to stop bleeding of the radial artery after puncture. The existing arterial compression hemostat is mainly composed of a spiral handle assembly, a pressing plate, a base, and a self-adhesive non-woven bandage, and is used for arterial compression hemostasis. However, the fixation effect of the existing arterial compression hemostat is not good, and the compression force is not easy to control. It mainly depends on the patient and the doctor to adjust the compression force of the hemostat through communication. The compression force is small and easy to bleed, and the high compression force leads to occlusion of the radial artery, resulting in the patient's fingers Numbness or pain, and even secondary damage to the radial artery, increasing the bleeding area of the wound.

Therefore, how to provide a radial artery hemostat that can automatically adjust the compression force according to the patient's own condition is an urgent problem to be solved at present.

Contents of the invention

The invention provides a radial artery hemostat, which solves the problem that the compression force of the existing arterial compression hemostat cannot be adjusted.

Technical scheme of the present invention is realized like this:

A radial artery hemostat, comprising: a compression part, a wrist strap and a control box; the compression part includes a pressing plate and a square air bag, which is used to compress the incision site; the wrist strap includes an outer interlayer and an air bag belt arranged in the Fix the compression part at the incision position; the control box includes a first adjustment part and a second adjustment part, the first adjustment part controls the inflation and deflation of the airbag belt, and the second adjustment part controls the inflation and deflation of the square airbag; The length adjustment buckle adjusts the length of the wristband and the overall position and compression force of the compression part; then the first adjustment part adjusts the tightness of the wristband according to the wrist posture, and then realizes the fine adjustment of the compression force of the compression part to the incision; the second adjustment part adjusts the compression force according to the bleeding The area adjusts the compression force of the compression part on the incision to realize further fine adjustment of the compression force of the incision;

A middle interlayer is arranged inside the wristband, and a long airbag belt is clamped in the middle interlayer. The airbag belt is arranged on the middle interlayer of the wristband through a W-shaped structure plate. Through the W-shaped structure, four airbag belts are arranged on the back of the wristband;

The compression part includes a square shell, the top of the square shell is closed, the bottom is open, and a pressure plate is set at the bottom opening. The pressure plate is made of transparent silica gel, and its length and width are set to fit closely with the inner wall of the square shell, and its thickness is half of the height of the square shell , press the pressure plate at the incision position, and tighten it with a wrist strap; the lower surface of the pressure plate is used to compress the incision, and a connecting rod is fixed on the upper surface of the pressure plate. The length of the connecting rod is half the height of the square shell, and the other end of the connecting rod is fixed on a metal On the sheet, the length and width of the metal sheet are the same as those of the pressure plate, and it is also closely attached to the inner wall of the square casing. A square airbag is arranged between the metal sheet and the top of the square casing. When the square airbag is inflated, its length and width are the same as the pressure plate. The height is 1/3 to 2/3 of the height of the pressure plate, the upper surface of the square airbag is pasted on the inner side of the top of the square shell, and the lower surface of the square airbag is pasted on the metal sheet;

The first adjustment part includes a posture detection device, a first pressurized air pump, a first electromagnetic valve, a second electromagnetic valve, a first piezoelectric sensor, and a comparator; A pressurized air pump is connected for inflation, and the air outlet of the airbag belt is connected with the first solenoid valve for deflation;

The posture detection device includes a shell, the six sides of the shell are square, and the first piezoelectric sensor and the weight block are arranged inside, the top surface and the bottom surface of the weight block are square, and the edges of the square are closely connected with the inner surface of the shell. Fitting, the thickness of the weight block is half of the shell, the first piezoelectric sensor is arranged on the bottom surface of the square shell, and the first piezoelectric sensor outputs a voltage signal according to the pressure of the weight block;

The second adjustment part includes an infrared camera, an image processor, a second piezoelectric sensor, a third analog-to-digital converter, a second single-chip microcomputer, a second pressurized air pump, a third electromagnetic valve, and a fourth electromagnetic valve. The infrared camera is arranged on the pressing plate At the rear, the infrared camera is set on the left or right side of the connecting rod to collect the bleeding area of the incision; the image processor extracts the bleeding area in the image collected by the infrared camera, and outputs the signal of the bleeding area value; the second piezoelectric sensor is set on the metal plate Between the square air bag and the pressure plate, it is used to collect the compression force on the pressure plate; the second adjustment part also includes a second single-chip microcomputer, because the bleeding area value output by the image processor is a digital signal, the second single-chip microcomputer directly receives the pressure of the image processor Output the bleeding area value, and receive the pressure signal output by the second piezoelectric sensor through the third analog-to-digital converter; the infrared camera collects the bleeding area image according to the preset time interval, and the second single-chip computer compares the two bleeding area values before and after, Control the inflation and deflation of the square airbag according to the ratio; the ratio of the two hemorrhage area values before and after is less than 1, indicating that the hemorrhage area has expanded. The fourth solenoid valve connected to the air inlet inflates the square airbag through the second pressurized air pump; when the ratio is equal to 1 or greater than 1, it means that the bleeding area has not expanded, and the second single-chip microcomputer controls the deflation of the square airbag according to the ratio. The third solenoid valve connected to the air outlet of the square airbag deflates the square airbag.

Optionally, the first adjustment part includes a comparator, the positive input terminal of the comparator is connected to the output terminal of the first piezoelectric sensor, the negative input terminal of the comparator is connected to a reference voltage, and the magnitude of the reference voltage is according to the first The level of the output voltage of a piezoelectric sensor is set, and the reference voltage is an intermediate value between the maximum output voltage and the minimum output voltage of the first piezoelectric sensor, and the intermediate value is not limited to the middle value between the maximum output voltage and the minimum output voltage value; the output signal of the comparator is respectively connected to the first pressurized air pump, the second electromagnetic valve, and the first electromagnetic valve, and is used to control the opening or closing of the first pressurized air pump, the second electromagnetic valve and the first electromagnetic valve; wherein , the first pressurized air pump and the second solenoid valve are negative voltage control logic, the first solenoid valve is positive voltage control logic, the first pressurized air pump and the second solenoid valve are enabled when receiving negative voltage, and are controlled according to the magnitude of the negative voltage The inflation time of the first pressurized air pump and the second solenoid valve is enabled when the first solenoid valve receives a positive voltage, and the deflation time of the solenoid valve is controlled according to the magnitude of the positive voltage, and then by controlling the first pressurized air pump and the second electromagnetic valve The inflation time of the valve and the deflation time of the first solenoid valve realize the control of the air volume in the airbag belt;

When the voltage signal output by the first piezoelectric sensor is greater than the reference voltage, the comparator outputs a positive voltage signal. Since the first pressurized air pump and the second solenoid valve are negative voltage control logic, the first solenoid valve is positive voltage control Logic, the first pressurized air pump and the second solenoid valve are not enabled, the first solenoid valve is enabled, and the air bag is exhausted; when the voltage signal output by the piezoelectric sensor is less than the reference voltage, the comparator A negative voltage signal is output, the first solenoid valve is disabled, the first pressurized air pump and the second solenoid valve are enabled, and the air bag is inflated.

Optionally, the negative voltage control logic of the first pressurized air pump is implemented by a reverse follower, and the reverse follower converts the negative voltage output by the comparator into a positive voltage of the same magnitude, and then passes the first analog-to-digital converter Converted into a digital voltage value, input to the first single-chip microcomputer; because the first solenoid valve is a positive voltage control logic, the positive voltage output by the comparator is converted into a digital voltage value by the second analog-to-digital converter, and input to the first single-chip microcomputer; Both the digital converter and the second analog-to-digital converter are effective for positive voltages, and only perform analog-to-digital conversion on positive voltages. When the comparator outputs positive voltages, the first analog-to-digital converter receives negative voltages, and the second analog-to-digital converter receives negative voltages. is a positive voltage, the second analog-to-digital converter outputs a digital voltage value, and the input port corresponding to the second analog-to-digital converter of the single-chip microcomputer receives the digital voltage value, and through internal calculation, the single-chip microcomputer outputs from the output port corresponding to the first solenoid valve A high-level signal enables the first solenoid valve to exhaust the airbag, and the output port of the first single-chip microcomputer corresponding to the first pressurized air pump and the second solenoid valve outputs a low-level or high-impedance signal. A pressurized air pump and the second solenoid valve are not enabled; when the comparator outputs a negative voltage, the first analog-to-digital converter receives a positive voltage, the second analog-to-digital converter receives a negative voltage, and the first analog-to-digital converter receives a negative voltage. Output a digital voltage value, the first single-chip microcomputer receives the digital voltage value corresponding to the input port of the first analog-to-digital converter, and through internal calculation, the first single-chip microcomputer outputs from the output port corresponding to the first pressurized air pump and the second solenoid valve A high-level signal enables the first pressurized air pump and the second solenoid valve to inflate the airbag, while the output port of the microcontroller corresponding to the first solenoid valve outputs a low-level or high-impedance signal, and the first solenoid valve not enabled.

Optionally, the single-chip microcomputer stores a digital voltage value table and a high-level time table, and the digital voltage value in the digital voltage value table corresponds to the high-level time on the high-level time table, and the first single-chip microcomputer receives the first For the digital voltage value output by the analog-to-digital converter or the second analog-to-digital converter, perform a look-up operation on the digital voltage value to find the corresponding high-level time, and output a high-level signal from the corresponding output port to the first Pressurized air pump, the second solenoid valve or the first solenoid valve, the time of the high level signal is obtained by looking up the table; the high level signal enables the first pressurized air pump, the second solenoid valve or the first solenoid valve, when When the high-level time is up, the high-level signal changes to a low-level or high-resistance state, and the first pressurized air pump, the second solenoid valve or the first solenoid valve are disabled and stop working.

Optionally, when the pressure signal is greater than the preset warning value during the process of inflating the square airbag, the second single-chip microcomputer closes the second pressurized air pump and the fourth solenoid valve connected to the air inlet of the square airbag, and stops charging the square airbag. Airbag inflation operation.

Optionally, a green LED light is also provided at the center behind the pressing plate for aligning with the cutout.

The beneficial effects of the present invention are:

(1) Adjust the length of the wristband and the overall position and pressure of the compression part through the length adjustment buckle on the wristband, so as to realize the preliminary adjustment of the pressure plate, the alignment is accurate, and it is easy to wear;

(2) According to the wrist posture, adjust the tightness of the wristband through the first adjustment part, and then realize the fine adjustment of the compression force of the incision by the compression part, and realize the automatic adjustment of the compression force during the wearing process;

(3) The second adjusting part adjusts the compressing force of the compressing part on the incision according to the bleeding area, so as to realize further fine adjustment of the compressing force on the incision.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the overall structure schematic diagram of a kind of radial artery hemostasis of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the wristband of the present invention;

Fig. 3 is a schematic structural diagram of the posture detection device of the present invention;

Fig. 4 is a schematic diagram of the principle of the first regulating part of the present invention;

Fig. 5 is a schematic diagram of a specific embodiment of the first regulating part of the present invention;

Fig. 6 is the internal operation schematic diagram of the first single-chip microcomputer of the present invention;

Fig. 7 is a schematic diagram of the principle of the second regulating part of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The invention provides a radial artery hemostat, which is used to compress the arterial incision after heart stent operation, and can automatically adjust the compression force of the hemostat according to the bleeding area and the patient's wrist posture.

As shown in FIG. 1 , the radial artery hemostat of the present invention includes a pressing part 10 , a wristband 20 and a control box 30 . The pressing part 10 includes a pressing plate 14 and a square air bag 17 for pressing the incision site. The wristband 20 includes an outer interlayer and an airbag strap disposed in the interlayer for fixing the compression part 10 at the incision position. The control box 30 includes a first adjustment part and a second adjustment part, the first adjustment part controls the inflation and deflation of the airbag belt, and the second adjustment part controls the inflation and deflation of the square airbag.

In the radial artery hemostat of the present invention, the length of the wristband, the overall position of the compression part and the compression force are first adjusted through the length adjustment buckle on the wristband; then the tightness of the wristband is adjusted according to the posture of the wrist through the first adjustment part, and then the compression is realized. The first adjustment part can fine-tune the compression force of the incision; the second adjustment part adjusts the compression force of the compression part to the incision according to the bleeding area, so as to realize further fine adjustment of the compression force of the incision.

Fig. 1 shows a schematic view of the overall structure of the radial artery hemostatic device of the present invention. As shown in Fig. 1, both ends of the base 11 of the compression part 10 are provided with a long notch 12, and the length of the notch 12 is the same as the width of the wristband 20. The wristband 20 passes through the notch 12, and after one end of the wristband 20 passes through the notch 12, the excess part is sewn on the wristband. In the embodiment shown in FIG. The part 13 is located at the right side of the wristband, and the other end of the wristband 20 is provided with a length adjustment buckle, such as a hook and loop fastener. After the wristband passes through the notch 12, the excess part is tightened and fixed by the length adjustment buckle, as shown in Fig. 1 In the illustrated embodiment, the length adjustment buckle 19 is located on the left side of the wristband.

When in use, first press the pressing part 10 on the incision position, then fix the wrist strap 20, and roughly adjust the length of the wrist strap through the length adjustment buckle to compress the incision.

Existing hemostats usually have the above-mentioned structure. After being fixed by the length adjustment buckle, the pressure of the pressure plate is controlled by the screw handle assembly, so as to achieve more precise adjustment of the compression force on the patient's surgical incision.

The control box of the present invention includes a first adjustment part and a second adjustment part, the first adjustment part controls the inflation and deflation of the airbag belt 21 in the wrist strap interlayer, adjusts the tightness of the wrist strap, and realizes the fine adjustment of the pressing force of the pressing plate, The second adjustment part controls the inflation and deflation of the square airbag in the compression part, and the compression force directly acts on the pressure plate, so as to realize the adjustment of the compression force of the pressure plate with higher precision.

As shown in Figure 2, a middle interlayer is arranged inside the wristband 20, and a strip-shaped airbag belt 21 is clamped in the middle interlayer. The notch on the left side of the base is tightened and fixed by the length adjustment buckle, and the non-airbag belt part 23 on the right side of the wrist strap is a sewing end, which passes through the notch on the right side of the base and is fixed by sewing. The airbag belt 21 is arranged in the middle interlayer of the wristband through a W-shaped structural disk, and the air inlet and air outlet of the airbag belt 21 are arranged at the sewing end 23. Through the W-shaped structure, four airbag belts are arranged on the wristband back position disk, and the airbag belt 21 is filled and discharged. When inflated, it can ensure that the wristband is evenly stressed.

As shown in FIG. 4 , the first adjustment unit includes a posture detection device, a first pressurized air pump 322 , a first solenoid valve 323 , a second solenoid valve 324 , a first piezoelectric sensor 3242 , and a comparator 3245 . The air inlet of the airbag belt 21 is connected with the first pressurized air pump 322 through the second electromagnetic valve 324 for inflation, and the air outlet of the airbag belt 21 is connected with the first electromagnetic valve 323 for deflation. The first adjustment part is arranged in the control box, as shown in Figure 1, the control box 30 is fixed on the junction of the base and the wrist strap sewing end, the pressing part 10 is located in the middle of the base 11, and the control box 30 is located between the pressing part 10 and the wrist. Between the sewing ends of the belt, at the sewing end of the wristband, the air inlet and the air outlet of the airbag belt 21 extend to the inside of the control box 30 through the adapter and the air guide tube, and are connected to the second electromagnetic valve and the first electromagnetic valve respectively. connect.

As shown in Figure 3, the posture detection device includes a housing 3241, the six sides of the housing 3241 are square, and a first piezoelectric sensor 3242 and a weight block 3243 are arranged inside, and the top surface and the bottom surface of the weight block 3243 are square , the edge of the square is closely attached to the inner surface of the shell 3241, the thickness of the weight block 3243 is 1/2 of the shell, the first piezoelectric sensor 3242 is arranged on the bottom surface of the square shell, the first piezoelectric sensor 3242 according to the weight The pressure output voltage signal of code block 3243.

When the wearer presses the compression part on the incision, and preliminarily adjusts the tightness through the length adjustment buckle of the wrist strap or the hook and loop fastener, the relative position between the control box and the human body is fixed. Therefore, the relative position between the posture detection device and the human arm It is also fixed, and the specific setting of the posture detection device is: when the human body is sitting or standing, the arm is drooping, the weight block 3243 is in a vertical state, and the weight block 3243 is completely pressed on the upper surface of the first piezoelectric sensor 3242, and the second A piezoelectric sensor 3242 outputs the maximum voltage value; when the human body is lying flat, the arm is placed horizontally, the weight block 3243 is in a horizontal state, the weight block 3243 does not squeeze the first piezoelectric sensor 3242, and the output of the first piezoelectric sensor is the smallest Voltage value; when the human arm is in other states, the weight block 3243 and the first piezoelectric sensor 3242 are squeezed at a certain angle, and the piezoelectric sensor outputs an intermediate value between the maximum value and the minimum value. In this way, the posture of the human arm can be obtained through the magnitude of the output voltage signal of the first piezoelectric sensor.

According to the voltage signal output by the posture detection device, the first adjustment part controls the opening or closing of the first pressurized air pump, the first electromagnetic valve and the second electromagnetic valve, so as to realize the control of the air volume in the airbag belt, and then realize the finer adjustment of the tightness of the wristband. The fine-tuning process will be described in detail below.

As shown in FIG. 4 , the first regulating part includes a comparator 3245, the positive input terminal of the comparator 3245 is connected to the output terminal of the first piezoelectric sensor 3242, the negative input terminal of the comparator is connected to the reference voltage, and the reference voltage The size is set according to the level of the output voltage of the first piezoelectric sensor. The reference voltage is an intermediate value between the maximum output voltage and the minimum output voltage of the first piezoelectric sensor. The intermediate value is not limited to the maximum output voltage and the minimum output median voltage. The output signal of the comparator 3245 is respectively connected to the first pressurized air pump 322, the second solenoid valve 324, and the first solenoid valve 323, for controlling the first pressurized air pump 322, the second solenoid valve 324, and the first solenoid valve 323. On or off. Among them, the first pressurized air pump 322 and the second solenoid valve 324 are negative voltage control logic, and the first solenoid valve 323 is positive voltage control logic, that is, the first pressurized air pump 322 and the second solenoid valve 324 are enabled when receiving negative voltage. , control the inflation time of the first pressurized air pump 322 and the second solenoid valve 324 according to the magnitude of the negative voltage, enable the first solenoid valve 323 when receiving a positive voltage, and control the deflation time of the solenoid valve according to the magnitude of the positive voltage, and then pass Controlling the inflation time of the first pressurized air pump 322 and the second solenoid valve 324 and the deflation time of the first solenoid valve 323 realizes the control of the gas volume in the airbag belt 21 .

When the voltage signal output by the first piezoelectric sensor 3242 is greater than the reference voltage, the comparator 3245 outputs a positive voltage signal. Since the first pressurized air pump 322 and the second solenoid valve 324 are negative voltage control logic, the first solenoid valve 323 is a positive voltage control logic, therefore, the first pressurized air pump 322 and the second electromagnetic valve 324 are not enabled, the first electromagnetic valve 323 is enabled, and the airbag belt 21 is exhausted; when the piezoelectric sensor 3242 The output voltage signal is less than the reference voltage, the comparator 3245 outputs a negative voltage signal, the first solenoid valve 323 is disabled, the first pressurized air pump 322 and the second solenoid valve 324 are enabled, and the airbag belt 21 is inflated .

The inflation and deflation process of the airbag belt is described in detail in conjunction with Fig. 3 and Fig. 4: when the wearer is sitting or standing, the wearer's arm is vertical, the radial artery is in the maximum filling state, and the weight block 3243 is pressed on the On the upper surface of the first piezoelectric sensor 3242, the first piezoelectric sensor 3242 outputs the maximum voltage, the voltage signal output by the first piezoelectric sensor 3242 is greater than the reference voltage, the comparator 3245 outputs a positive voltage signal, and the first plus The compressed air pump 322 and the second electromagnetic valve 324 are not enabled, the first electromagnetic valve 323 is enabled, and the airbag belt 21 is exhausted, and it is the maximum displacement, because when sitting or standing, the wearer's wrist circumference is in the maximum state , to discharge the gas in the airbag belt, which can relieve the tension of the wrist and prevent excessive compression from causing damage to the radial artery; when the wearer lies flat, the wrist is placed horizontally, and the weight block 3243 and the first piezoelectric The sensor 3242 does not squeeze, the first piezoelectric sensor 3242 outputs the minimum voltage, the voltage signal output by the first piezoelectric sensor 3242 is smaller than the reference voltage, the comparator 3245 outputs a negative voltage signal, and the first solenoid valve 323 does not Enable, the first pressurized air pump 322 and the second electromagnetic valve 324 are enabled, the airbag belt 21 is inflated, and it is the maximum amount of inflation, because when lying flat, the wearer's wrist circumference is at the minimum state, and the airbag is inflated, which can enhance The tightness of the pressing plate and the skin prevents the expansion of the bleeding area caused by insufficient compression; when the wearer is in other postures, the weight block 3243 and the piezoelectric sensor 3242 are squeezed at a certain angle, and the output of the piezoelectric sensor 3242 is the largest The intermediate value between the value and the minimum value, according to the relationship between the voltage signal of the piezoelectric sensor and the reference voltage, the inflation and deflation of the airbag belt is controlled, and the automatic adjustment of the tightness of the wristband is realized.

After the operation, the patient wears the radial artery hemostat with the arm flat. Therefore, after wearing it, adjust the tightness of the wristband through the length adjustment buckle. Since the patient is lying flat at this time, the first pressurized air pump will inflate the airbag belt, and the wristband will be inflated. The wrist strap is tightened; when the patient is standing or sitting, the arm is naturally drooping, the first solenoid valve deflates the airbag belt, and the wrist strap is loosened to ensure that the patient is comfortable to wear and prevent blood circulation from being blocked.

Fig. 5 shows a specific embodiment of the first regulating part. In this embodiment, the negative voltage control logic of the first pressurized air pump 322 is realized by a reverse follower 3246, and the reverse follower 3246 converts the output of the comparator 3245 to The negative voltage is converted into a positive voltage of the same size, and then converted into a digital voltage value by the first analog-to-digital converter 3247, and input to the first single-chip microcomputer 3249; since the first solenoid valve 323 is a positive voltage control logic, the output of the comparator 3245 The positive voltage is converted into a digital voltage value by the second analog-to-digital converter 3248, and input to the single-chip microcomputer 3249; the above-mentioned first analog-to-digital converter 3247 and the second analog-to-digital converter 3248 are both valid for positive voltages, that is, only positive voltages are analog-digital Therefore, when the comparator 3245 outputs a positive voltage, what the first analog-to-digital converter 3247 receives is a negative voltage, what the second analog-to-digital converter 3248 receives is a positive voltage, and the second analog-to-digital converter outputs a digital voltage value, and the microcontroller corresponds to The input port of the second analog-to-digital converter receives the digital voltage value, and through internal calculation, the single-chip microcomputer outputs a high-level signal from its output port corresponding to the first solenoid valve, enabling the first solenoid valve 323, and the airbag belt 21 exhaust, and the output port corresponding to the first pressurized air pump 322 and the second electromagnetic valve 324 of the single-chip microcomputer outputs a low level or a high-impedance state signal, and the first pressurized air pump 322 and the second electromagnetic valve 324 are not enabled; When the comparator 3245 outputs a negative voltage, what the first analog-to-digital converter 3247 receives is a positive voltage, what the second analog-to-digital converter 3248 receives is a negative voltage, the first analog-to-digital converter outputs a digital voltage value, and the microcontroller corresponds to the first analog The input port of the digital converter receives the digital voltage value, and through internal calculation, the single-chip microcomputer outputs a high-level signal from its output port corresponding to the first pressurized air pump 322 and the second electromagnetic valve 324, and the first pressurized air pump 322 And the second solenoid valve 324 is enabled to inflate the airbag belt 21, and the output port of the single-chip microcomputer corresponding to the first solenoid valve outputs a low level or high-impedance signal, and the first solenoid valve 323 is disabled.

The internal operation process of the single-chip microcomputer is shown in Figure 6. The digital voltage value table and the high-level time table are stored in the single-chip microcomputer 3249. The digital voltage value in the digital voltage value table corresponds to the high-level time on the high-level time table. Therefore, the first single-chip microcomputer 3249 receives the digital voltage value output by the first analog-to-digital converter 3247 or the second analog-to-digital converter 3248, performs a table look-up operation on the digital voltage value, finds the high level time corresponding to it, and obtains from the corresponding The output port of the output port outputs a high-level signal to the first pressurized air pump, the second electromagnetic valve or the first electromagnetic valve, and the time of the high-level signal is obtained through the above-mentioned look-up table. The high-level signal enables the first pressurized air pump, the second solenoid valve or the first solenoid valve. When the high-level time is up, the high-level signal becomes a low-level or high-resistance state, and the first pressurized air pump, the second solenoid valve The second solenoid valve or the first solenoid valve is disabled and stops working.

The radial artery hemostat of the present invention recognizes the posture of the patient's arm and adjusts the tightness of the wristband through the first adjustment part, which is more comfortable than the existing compression hemostat.

In order to further finely adjust the pressure of the pressing plate, control the bleeding area of the incision, and improve the hemostatic effect, the radial artery hemostatic device of the present invention further includes a second adjustment part, which is used for fine-tuning the pressing force of the pressing plate.

As shown in Figure 1, the pressing part 10 of the present invention comprises a square shell, the top of the square shell is closed, the bottom is open, and a pressing plate 14 is arranged at the bottom opening. Close fit, its thickness is half of the height of the square shell, for example, the pressure plate is a transparent silicone pad with a width of 2cm, a length of 3cm, and a thickness of 1cm, and the pressure plate 14 is pressed at the incision position and tightened with a wrist strap. The thickness of the pressing plate is half of the square casing, the lower surface of the pressing plate is used to compress the incision, and a connecting rod 15 is fixed on the upper surface of the pressing plate. The length of the connecting rod is half the height of the square casing, and the other end of the connecting rod is fixed on a metal sheet 16. The length and width dimensions of the metal sheet are the same as those of the pressing plate, and are also tightly fitted to the inner wall of the square casing. A square airbag 17 is arranged between the metal sheet and the top of the square casing. It is 1/3～2/3 of the height of the pressing plate, the upper surface of the square airbag 17 is pasted with the inner side of the top of the square shell, and the lower surface of the square airbag is pasted with the metal sheet 16.

When the square airbag 17 is fully deflated, the metal sheet 16 is attached to the top of the square casing, the thickness of the pressure plate 14 and the connecting rod 15 is just equal to the height of the square casing, plus the thickness of the metal sheet 16 and the square airbag, the pressure plate 14 protrudes slightly At the bottom of the square housing, a pressing plate 14 can be used to compress the incision. When the square airbag is in the inflated state, the pressure plate 14 continues to protrude outward. When the square airbag is in the fully inflated state, the pressure plate 14 protrudes from the square shell by 1/3 to 2/3 of the height of the pressure plate, but not completely protruding, so that the pressure plate can be firmly installed on the square. Inside the shell.

As shown in Figure 7, the second adjustment part includes an infrared camera 4242, an image processor 4243, a second piezoelectric sensor 4244, a third analog-to-digital converter 4245, a second single-chip microcomputer 4249, a second pressurized air pump 422, a third electromagnetic Valve 423, the 4th electromagnetic valve 424, infrared camera 4242 are arranged on the pressing plate rear, and this infrared camera is arranged on the left and right sides of connecting rod 15 shown in Figure 1, because pressing plate is made of transparent silica gel material, so infrared camera can effectively collect the incision. bleeding area without being affected by the platen. The image processor 4243 extracts the hemorrhage area in the image collected by the infrared camera, and outputs a signal of the hemorrhage area value. The second adjustment part of the present invention also includes a second piezoelectric sensor 4244, the second piezoelectric sensor 4244 is arranged between the metal plate 16 and the square air bag 17, and is used to collect the pressure force on the pressure plate, which pressure force includes wrist strap pressure Force and the compressive force of the square airbag on the pressing plate.

The second adjustment part also includes a second single-chip microcomputer 4249. Since the bleeding area value output by the image processor 4243 is a digital signal, the second single-chip microcomputer 4249 directly receives the bleeding area value output by the image processor, and passes the modulus The converter 4245 receives the pressure signal output by the second piezoelectric sensor 4244 . The infrared camera collects images of the bleeding area according to the preset time interval, and the second single-chip microcomputer compares the two bleeding area values before and after, and controls the inflation and deflation of the square airbag according to the ratio, thereby realizing the control of the pressing force of the pressing plate. The ratio of the two hemorrhage area values before and after is less than 1, indicating that the hemorrhage area is enlarged. Therefore, the single-chip microcomputer controls the inflation rate of the second pressurized air pump 422 according to the ratio, and opens the second pressurized air pump 422 and connects with the air inlet of the square air bag. The fourth solenoid valve 424 inflates the square airbag through the second pressurized air pump 422; when the ratio is equal to 1 or greater than 1, it means that the bleeding area has not expanded, and the second single-chip microcomputer controls the deflation of the square airbag 423 according to the ratio, and the opening and square The third solenoid valve 423 connected to the air outlet of the air bag 17 deflates the square air bag.

When the above-mentioned square airbag inflation process, when the pressure signal was greater than the preset warning value, the second single-chip microcomputer closed the second pressurized air pump 422 and the fourth solenoid valve 424 connected with the square airbag air inlet, and stopped the operation of the square airbag. The inflatable operation prevents compression damage to the patient's blood vessels.

Preferably, in order to improve the compression accuracy of the radial artery hemostat of the present invention, a green LED light is provided at the center behind the pressing plate of the present invention for alignment with the incision.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (6)

1. a kind of radial artery hemostat characterized by comprising oppression department, wrist strap and control box；Oppression department includes pressing plate and side Shape air bag, for oppressing cutting part；Wrist strap includes intermediate course and the strip air bag that is arranged in intermediate course Band, for oppression department to be fixed on incision site；Controlling box includes the first adjustment portion and the second adjustment portion, the control of the first adjustment portion The inflation/deflation of air sac belt, the second adjustment portion control rectangular air bag inflation/deflation；Wrist is adjusted by the length-adjustment buckle on wrist strap first The length and oppression department integral position and oppressive force of band；Then the first adjustment portion adjusts the elastic of wrist strap according to wrist posture Degree, and then realize accurate adjustment of the oppression department to notch oppressive force；Second adjustment portion adjusts oppression department to notch according to bleeding area Oppressive force realizes the further accurate adjustment to notch oppressive force；

Air sac belt is located at wrist strap intermediate course by W character form structure disk, and by W character form structure, wrist strap the back of the hand position disk is equipped with four Air sac belt；

Oppression department includes square shell, and square shell is top closed, bottom opening, pressing plate is arranged at bottom opening, pressing plate is Bright silica gel is made, and length and width dimensions are set as fitting closely with square shell inner sidewall, with a thickness of the one of square shell height Half, pressing plate is oppressed in incision site, and with wrist strap and is tightened；For oppressing notch, pressing plate upper surface fixes one for pressing plate lower surface Connecting rod, the length of the connecting rod are the half of square shell height, and the connecting rod other end is fixed on a sheet metal, the gold The length and width dimensions for belonging to piece are identical as pressing plate, also fit closely with square shell inner wall, between sheet metal and the top of square shell Rectangular air bag is set, when rectangular inflated condition, length and width dimensions are identical as pressing plate, height be platen elevation 1/3~ 2/3, rectangular air bag upper surface and square shell inside top face are pasted, and rectangular air bag lower surface is mutually pasted with the sheet metal；

First adjustment portion includes gesture detection means, the first pressurization air pump, the first solenoid valve, second solenoid valve, the first pressure Electric transducer, comparator；The air inlet of air sac belt is connect by second solenoid valve with the first pressurization air pump, for inflating, air bag The gas outlet of band is connect with the first solenoid valve, for deflating；

The gesture detection means include shell, and six faces of shell are square, be internally provided with the first piezoelectric transducer and The top and bottom of weight block, weight block are square, and the edge of the square and the medial surface of shell fit closely, weight block The half with a thickness of shell, the bottom surface of shell is arranged in the first piezoelectric transducer, and the first piezoelectric transducer is according to counterweight The pressure output voltage signal of block；

Second adjustment portion includes infrared camera, image processor, the second piezoelectric transducer, third analog-digital converter, the second list Piece machine, the second pressurization air pump, third solenoid valve, the 4th solenoid valve, infrared camera are arranged at pressing plate rear, and infrared camera is set Connecting rod left side or right side are set, the bleeding area of notch is acquired；In the image that image processor acquires infrared camera Bleeding area extracts, and exports bleeding area value signal；Second piezoelectric transducer is arranged between metal plate and rectangular air bag, The oppressive force being subject to for acquiring pressing plate；Second adjustment portion further includes second singlechip, due to the output of described image processor Bleeding area value is digital signal, and second singlechip directly receives the bleeding area value of described image processor output, and passes through Third analog-digital converter receives the pressure signal of the second piezoelectric transducer output；Infrared camera is acquired according to prefixed time interval Bleeding area image, by front and back, bleeding area value is compared second singlechip twice, according to filling for the rectangular air bag of Ratio control It deflates；When the ratio of front and back bleeding area value twice is less than 1, illustrate that bleeding area expands, single-chip microcontroller is according to Ratio control second It pressurizes the aeration quantity of air pump, opens the second pressurization air pump and the 4th solenoid valve that is connected with rectangular air bag air inlet, by the Two pressurization air pump square shaped air bag inflations；When ratio is equal to 1 or greater than 1, illustrates that bleeding area does not expand, second singlechip According to the discharge quantity of the rectangular air bag of Ratio control, the third solenoid valve being connected with rectangular air bag gas outlet, square shaped air bag are opened It deflates.

2. a kind of radial artery hemostat as described in claim 1, which is characterized in that first adjustment portion includes comparator, The positive input of comparator is connected to the output end of the first piezoelectric transducer, and the negative input of comparator is connected to reference to electricity Pressure, the size of reference voltage are configured according to the grade of the first piezoelectric transducer output voltage, and reference voltage is the first piezoelectricity An intermediate value between sensor maximum output voltage and minimum output voltage, the intermediate value are not limited to maximum The intermediate value of output voltage and minimum output voltage；The output signal of comparator is connected respectively to the first pressurization air pump, the second electromagnetism Valve, the first solenoid valve, for controlling opening or closing for the first pressurization air pump and second solenoid valve and the first solenoid valve；Its In, the first pressurization air pump and second solenoid valve are negative voltage control logic, and the first solenoid valve is positive voltage control logic, and first adds Compression pump and second solenoid valve enable when receiving negative voltage, according to the first pressurization air pump of the size of negative voltage control and the second electromagnetism The inflationtime of valve, the first solenoid valve enable when receiving positive voltage, and the deflation of the first solenoid valve is controlled according to the size of positive voltage Time, so it is real by the first pressurization air pump of control and the inflationtime of second solenoid valve and the deflation time of the first solenoid valve The control of tolerance in existing air sac belt；

When the voltage signal of first piezoelectric transducer output is greater than reference voltage, the comparator exports positive voltage signal, Since the first pressurization air pump and second solenoid valve are negative voltage control logic, the first solenoid valve is positive voltage control logic, described First pressurization air pump and second solenoid valve do not enable, and first solenoid valve is enabled, air sac belt exhaust；When the piezoelectric transducer The voltage signal of output is less than reference voltage, and the comparator exports negative voltage signal, and first solenoid valve does not enable, described First pressurization air pump and second solenoid valve are enabled, air sac belt inflation.

3. a kind of radial artery hemostat as claimed in claim 2, which is characterized in that the negative electricity of the first pressurization air pump is voltage-controlled Logic processed realizes that the negative voltage transition that reversed follower exports comparator is an equal amount of positive electricity by reversed follower Pressure, is then converted to digital voltage value by the first analog-digital converter, is input to first singlechip；Since the first solenoid valve is just The positive voltage of voltage control logic, comparator output is converted to digital voltage value by the second analog-digital converter, is input to first Single-chip microcontroller；First analog-digital converter and the second analog-digital converter are all that positive voltage is effective, only carry out analog-to-digital conversion to positive voltage, than When exporting positive voltage compared with device, received the first analog-digital converter is negative voltage, and received the second analog-digital converter is positive voltage, the Two analog-digital converters export digital voltage value, and the input port of corresponding second analog-digital converter of first singlechip receives number electricity Pressure value, by internal arithmetic, first singlechip exports high level signal from its output port corresponding with the first solenoid valve, will First solenoid valve is enabled, is vented to air sac belt, and first singlechip and the first pressurization air pump and second solenoid valve are corresponding defeated Exit port exports low level or high-impedance state signal, and the first pressurization air pump and second solenoid valve do not enable；When comparator output is negative When voltage, received the first analog-digital converter is positive voltage, and received the second analog-digital converter is negative voltage, the first analog-to-digital conversion Device exports digital voltage value, and the input port of corresponding first analog-digital converter of first singlechip receives the digital voltage value, passes through Internal arithmetic, first singlechip are believed from its output port output high level corresponding with the first pressurization air pump and second solenoid valve Number, the first pressurization air pump and second solenoid valve are enabled, air sac belt is inflated, and first singlechip is corresponding with the first solenoid valve Output port output low level or high-impedance state signal, the first solenoid valve do not enable.

4. a kind of radial artery hemostat as claimed in claim 3, which is characterized in that the first singlechip is stored with digital electricity Pressure value table and high level time table, the digital voltage value in digital voltage value table and the high level time phase on high level time table Corresponding, first singlechip receives the digital voltage value of the first analog-digital converter or the output of the second analog-digital converter, by number electricity Pressure value carry out table lookup operation, find corresponding high level time, from corresponding output port export high level signal to First pressurization air pump, second solenoid valve or the first solenoid valve, the time of the high level signal are obtained by tabling look-up；High level letter Number enabled first pressurization air pump, second solenoid valve or the first solenoid valve, when high level time arrives, high level signal becomes low electricity Flat perhaps high-impedance state first pressurization air pump, second solenoid valve or the first solenoid valve do not enable, and stop working.

5. a kind of radial artery hemostat as described in claim 1, which is characterized in that during the inflation of square shaped air bag, When pressure signal is greater than preset warning value, second singlechip closes the second pressurization air pump and is connected with rectangular air bag air inlet The 4th solenoid valve, stop square shaped air bag charge operation.

6. a kind of radial artery hemostat as described in claim 1, which is characterized in that the center at the pressing plate rear is additionally provided with Green LED lamp, for being aligned with notch.