TWI759993B - Method and device of contact-type blood pressure measurement - Google Patents

Abstract

The present invention relates to a method and device of contact-type blood pressure measurement. The method includes: using a sphygmomanometer to measure an initial blood pressure of a human body; using an image capturing device to obtain a continuous image of the human body; using a control unit to retrieve a first blood pressure frequency information according to the brightness change of the continuous image within a first time interval and to calculate an impedances of blood vessel; using the control unit to retrieve a second blood pressure frequency information according to the brightness change of the continuous image within a second time interval and to calculate an updated blood pressure. Thereby, a medical staff only needs to measure the initial blood pressure, and the subsequent updated blood pressure can be automatically calculated by the control unit. This can be used for continuous blood pressure monitoring without frequent measurement, and the image capturing device contacting the human body improves the accuracy of the updated blood pressure.

Description

Contact blood pressure detection method and device

The present invention relates to a method and device for continuously detecting blood pressure, and particularly to a method and device for continuously detecting blood pressure by means of contact.

Non-invasive blood pressure detection is mainly divided into contact type and non-contact type.

Contact-type blood pressure detection, for example, includes a cuff and a blood pressure measuring device for its application provided by the Republic of China Patent Publication No. M483774. The aforementioned patent case mainly expands the fluid bag to block the blood flow of human arteries, and then reduces the air pressure in the fluid bag to allow the blood flow to circulate. The detector senses, and finally the blood pressure measuring host calculates the systolic blood pressure value of the human blood pressure, and when the fluid bag does not compress the human arteries, the diastolic blood pressure value of the human blood pressure is estimated.

For example, non-contact blood pressure monitoring includes: "Research and Implementation of Real-time Continuous Monitoring of Heart Rate, Heart Rate Variability, and Blood Pressure Using Face Video" by Zhang Zhizhong, Institute of Information Management, National Taipei University of Nursing and Health. The aforementioned paper mainly uses a webcam to non-contact the subject's face, and uses a charge-coupled element image sensor to convert the light change into a voltage signal, which is then converted into a digital signal by an analog-to-digital converter, and finally converted into a digital signal by a computer. The physiological parameters of the subjects were analyzed.

When patients have high blood pressure or other high-risk diseases, they often need to measure blood pressure frequently, maybe even every hour. In this case, if there are several names like this of patients are hospitalized at the same time, and if each patient is to be measured every hour in the manner described in the aforementioned patent case, and other general patients are also taken into consideration, medical staff will be overwhelmed.

In contrast, the method of the aforementioned paper is more able to solve the dilemma of the shortage of medical staff. However, the aforementioned paper actually has an error of up to 9 mmHg in systolic blood pressure and 5 mmHg in diastolic blood pressure. Medical staff have misjudged the blood pressure of patients, and the accuracy of blood pressure measurement in the aforementioned paper still needs to be improved.

Therefore, the present inventor proposes a contact-type blood pressure detection method, comprising: firstly measuring the blood pressure of a human body with a sphygmomanometer, and obtaining an initial blood pressure of the human body; The image capturing element contacts the human body and obtains a continuous image of the human body in a first time interval; a control unit obtains a continuous image of the human body from the continuous image according to the light and dark changes of the continuous image in the first time interval first blood pressure frequency information; the control unit divides the initial blood pressure by the first blood pressure frequency information to obtain a blood vessel impedance of the human body; the image capture element contacts the human body and obtains the human body in a second time interval In the continuous image, the control unit obtains a second blood pressure frequency information of the human body from the continuous image according to the light and dark changes of the continuous image in the second time interval; and the control unit multiplies the blood vessel impedance by the second Blood pressure frequency information to obtain an updated blood pressure of the human body.

Further, when the image capturing element contacts the human body and obtains the continuous image of the human body in the first time interval or in the second time interval, the control unit controls an image fill light element of the contact image unit A supplementary light is emitted to the human body.

Further, after acquiring the initial blood pressure and the updated blood pressure of the human body, the control unit sends the initial blood pressure and the updated blood pressure to a display unit for display.

Further, after acquiring the initial blood pressure and the updated blood pressure of the human body, the control unit uploads the initial blood pressure and the updated blood pressure to a hospital information system.

Wherein, the control unit calculates the changes of the blood flow of the human body in the first time interval and the second time interval respectively according to the light and dark changes of the continuous image in the first time interval and the second time interval, and then Calculate a flow time integral in the first time interval and the second time interval respectively, and multiply by the reciprocal of the first time interval and the second time interval respectively, as the first blood pressure frequency information and The second blood pressure frequency information.

The present inventor also proposes a different contact-type blood pressure detection method, which includes: firstly measuring the blood pressure of a human body with a sphygmomanometer, and obtaining an initial blood pressure of the human body; The light emitting element contacts the human body and emits an incident light to the human body; a light receiving element of the contact light unit obtains a reflected light of the human body in a first time interval; a control unit according to the reflected light in the first time interval The light and dark changes in a time interval obtain a first blood pressure frequency information of the human body from the reflected light; the control unit divides the initial blood pressure by the first blood pressure frequency information to obtain a blood vessel impedance of the human body; the light receiving The element contacts the human body and obtains the reflected light of the human body in a second time interval, and the control unit obtains a second blood pressure of the human body from the reflected light according to the light and dark changes of the reflected light in the second time interval frequency information; and the control unit multiplies the blood vessel impedance by the second blood pressure frequency information to obtain an updated blood pressure of the human body, wherein the control unit is in the first time interval and the second time interval according to the reflected light The light and dark changes of the human body in the first time interval and the second time interval are respectively calculated, and then a flow time integral in the first time interval and the second time interval is calculated respectively, and respectively with the first time interval and The reciprocals of the second time interval are multiplied to obtain the first blood pressure frequency information and the second blood pressure frequency information.

The inventor further proposes a contact-type blood pressure detection device for continuously measuring the blood pressure of a human body. The contact-type blood pressure detection device includes: a control unit; After the human body is measured to obtain an initial blood pressure of the human body; and a contact image unit, the signal is connected to the control unit, the contact image unit includes an image capture element, and the image capture element selectively contacts the the human body; the sphygmomanometer first measures the blood pressure of the human body to obtain the initial blood pressure, the image capturing element then contacts the human body and obtains a continuous image of the human body in a first time interval, the control unit according to the obtaining a first blood pressure frequency information of the human body from the continuous image of the light and dark changes in the first time interval, and dividing the initial blood pressure by the first blood pressure frequency information to obtain a blood vessel impedance of the human body; The image capturing element contacts the human body and acquires the continuous image of the human body in a second time interval, and the control unit acquires the human body from the continuous image according to the light and dark changes of the continuous image in the second time interval a second blood pressure frequency information, the control unit multiplies the blood vessel impedance by the second blood pressure frequency information to obtain an updated blood pressure of the human body, wherein the control unit according to the continuous image in the first time interval and the second Light and dark changes in the time interval, respectively calculate the blood flow changes of the human body in the first time interval and the second time interval, and then calculate the first time interval and the second time interval respectively. A flow time in the time interval Integrate and multiply by the reciprocals of the first time interval and the second time interval respectively to obtain the first blood pressure frequency information and the second blood pressure frequency information.

Further, the contact image unit has an image supplementary light element; when the image capture element contacts the human body and obtains the continuous image of the human body in the first time interval or the second time interval, the control unit controls The image supplementary light element emits supplementary light to the human body.

Wherein, the light intensity of the supplementary light is between 0.1 candle light and 20 candle light, and the light wavelength of the supplementary light is between 620 nanometers and 750 nanometers.

Further, the contact image unit has two opposite plates, one end of the plate is combined with a pivot element so that the plate can pivot relatively, and the other end of the plate has a clamping portion for clamping The human body and the image capturing element are located on the clamping portion of one of the boards.

Further, the sphygmomanometer is an arm cuff.

According to the above technical features, the following effects can be achieved:

1. Medical staff only need to measure the initial blood pressure for the first time, and the subsequent updated blood pressure can be automatically calculated by the control unit, without the need for medical staff to measure frequently, and the contact image unit or contact light unit will contact the human body. At the same time as the shortage of medical staff, the accuracy of updating blood pressure should be improved.

2. With the image supplementary light element, the light intensity of the supplementary light is between 0.1 candle light and 20 candle light, and the light wavelength is between 620 nanometers and 750 nanometers, so as to ensure that the light and dark changes of continuous images are clear and accurate enough. The auxiliary control unit obtains the most accurate first blood pressure frequency information and second blood pressure frequency information.

3. After the control unit obtains the initial blood pressure and the updated blood pressure, it can send the initial blood pressure and the updated blood pressure to the display unit for display, which is convenient for medical staff to confirm immediately, or upload it to the hospital information system for subsequent statistics and analysis of medical information.

4. The human body is clamped by the contact image unit to ensure that the image capture element is stably contacted with the human body, and the separation of the image capture element from the human body and the lowering of the accuracy of updating the blood pressure are avoided.

5. The sphygmomanometer can be a traditional arm-type pulse pressure belt, which conforms to the existing medical habits of medical staff and reduces the rejection of medical staff.

6. In addition to calculating the first blood pressure frequency information and the second blood pressure frequency information by the continuous images obtained by the contact image unit, the first blood pressure frequency information and the second blood pressure frequency information can also be calculated by the reflected light obtained by the contact light unit. The calculation of blood pressure frequency information has a wider range of applications.

1,1a: Control unit

2,2a: Sphygmomanometer

21: The first joint

22: The second joint

23: Airbag

24: Communicator

25: Sensor

3: Contact image unit

31: The first board

32: Second board

33: Image capture component

34: Image fill light element

35: Clamping part

36: Pivoting element

4,4a: Display unit

5a: Contact light unit

51a: Light emitting element

52a: Light receiving element

A: human body

B: Hospital Information System

t ₀ : start time

t ₁ : the first time

t ₂ : the second time

t ₃ : the third time

t ₄ : Fourth time

t ₅ : fifth time

t ₆ : sixth time

[Figure 1] is a three-dimensional external view of the first embodiment of the present invention.

[Fig. 2] is a system block diagram of the first embodiment of the present invention.

[Figure 3] is a side view of the contact image unit according to the first embodiment of the present invention.

[FIG. 4] is a schematic flow chart of the first embodiment of the present invention.

[Fig. 5] is a schematic diagram 1 of the implementation of the first embodiment of the present invention, showing the use of a sphygmomanometer.

[Fig. 6] is the second implementation diagram of the first embodiment of the present invention, which illustrates the use of a contact image unit.

[Figure 7] is a side view of the first embodiment of the present invention in the implementation state, showing that the finger touches the contact image unit.

[Figure 8] is a schematic diagram of the relationship between image brightness and time according to the first embodiment of the present invention.

[Figure 9] is a schematic diagram 3 of the implementation of the first embodiment of the present invention, which shows the connection with the hospital information system, and the updated blood pressure is displayed on the display unit.

[Fig. 10] is a system block diagram of the second embodiment of the present invention.

[Figure 11] is a schematic flow chart of the second embodiment of the present invention.

[Figure 12] is a side view of the second embodiment of the present invention in an implementation state, showing that a finger touches the contact light unit.

In view of the above technical features, the main effects of the contact-type blood pressure detection method and the device thereof of the present invention will be clearly presented in the following embodiments.

Please refer to the first and second figures, which show the first embodiment of the contact-type blood pressure detection device according to the embodiment of the present invention, which can be used to execute a contact-type blood pressure detection method of the present invention to continuously measure a human body A[ The human body A, please match the blood pressure of the fifth picture], the contact blood pressure detection device includes:

A control unit 1. In a preferred embodiment of the present invention, the control unit 1 is in the form of a remote control. In actual implementation, the control unit 1 may also be a mobile phone, a computer, or a tablet computer.

A sphygmomanometer 2, the signal is connected to the control unit 1, in a preferred embodiment of the present invention, the sphygmomanometer 2 is an arm-type cuff, in practice, the sphygmomanometer 2 can also be a mercury-type sphygmomanometer or other Traditional sphygmomanometer. The opposite ends of the sphygmomanometer 2 have a first joint portion 21 and a second joint portion 22. The first joint portion 21 and the second joint portion 22 can be, for example, devil felt, buckles, buttons, etc. The present invention Take devil felt as a preferred embodiment. The sphygmomanometer 2 also has an air bag 23 , a communication device 24 and a sensor 25 . The inflation or deflation of the air bag 23 is controlled by the control unit 1 via the communication device 24 , and the sensor 25 is controlled by the communication device 24 . The signal of the controller 24 is connected to the control unit 1 .

A contact image unit 3, please refer to the first to third figures, the contact image unit 3 is connected to the control unit 1 for signals, and the contact image unit 3 includes a first plate 31 and a second plate opposite to each other up and down The board 32 has an image capturing element 33 and an image supplementary light element 34 adjacently disposed on the second board 32 . One end of the first plate 31 and the second plate 32 has a clamping portion 35 to clamp the human body A [please match the fifth picture], the first plate 31 and the second plate The other end of 32 can be relatively pivoted by a pivot element 36, the image capture element 33 and the image fill light element 34 are both located on the clamping portion 35 of the second plate 32 to selectively contact with the human body A. In a preferred embodiment of the present invention, the contact image unit 3 is clamped on the finger end of the human body A, the upper part refers to the back of the hand, and the lower part refers to the back of the hand. The square refers to the palm side, and the first board 31 corresponds to the back of the hand, and the second board 32 corresponds to the palm side, so that the image capturing element 33 and the image compensation device disposed on the second board 32 The light element 34 is not affected by the nails on the back of the hand, which reduces the measurement error.

A display unit 4 is connected to the control unit 1 for signals. In a preferred embodiment of the present invention, the display unit 4 is combined with the control unit 1 . In actual implementation, the display unit 4 can also be an independent screen, or combined with a physiological monitor or the like.

Please refer to Figure 4 and Figure 5 together with Figure 1. To use the contact-type blood pressure detection device to perform the contact-type blood pressure detection method, first wrap the sphygmomanometer 2 on the human body A, and then Preferably, the sphygmomanometer 2 is wrapped around the upper arm of the human body A by a medical staff. The medical staff then attaches the first joint portion 21 and the second joint portion 22 to each other, so that the sphygmomanometer 2 is stably wrapped around the human body A. Next, the medical staff operates the control unit 1 to inflate or deflate the airbag 23 controlled by the control unit 1, and measure the vibration of the surface of the human body A by the sensor 25, and the control unit 1 further obtains An initial blood pressure of the human body A, the control unit 1 displays the initial blood pressure on the display unit 4, such as 140/90 mmHg as shown in the fifth figure. It should be specially added that the operation principle of the sphygmomanometer 2 is a conventional technology, so it will not be repeated here, nor is it drawn in detail in the drawings. Since the sphygmomanometer 2 can be a traditional arm-type cuff, it conforms to the medical practice of the medical staff and reduces the rejection of the medical staff.

Please refer to Fig. 4, Fig. 6 and Fig. 7, after the control unit 1 obtains the initial blood pressure of the human body A [please match the control unit 1 with the first picture], the medical staff presses the contact image unit 3, The first plate 31 and the second plate 32 are relatively pivoted by the pivot element 36, so that the clamping portions 35 of the first plate 31 and the second plate 32 are separated from each other, and then the The finger end of the human body A is placed between the first plate 31 and the clamping portion 35 of the second plate 32, and the medical staff releases the contact shadow In the image unit 3, the first plate 31 and the second plate 32 are pivoted relative to each other again by the pivot element 36, so that the contact image unit 3 is clamped to the human body by the clamping portion 35. A's finger end.

After the contact image unit 3 is clamped to the human body A, the image capturing element 33 and the image supplementary light element 34 both contact the human body A. The image capturing element 33 first obtains a continuous image of the human body A in a first time interval, for example, from a start time t ₀ to a first time t ₁ , and from the first time t ₁ to a second time t ₂ [please match the starting time t ₀ , the first time t ₁ and the second time t ₂ with Figure 8], the first time interval represents one heartbeat cycle (one heart beat systolic relaxation time and a relaxation time). The control unit 1 then selects whether to control the image supplementary light element 34 to emit supplementary light to the human body A according to the continuous image, and the light intensity of the supplementary light is between 0.1 candlelight and 20 candlelight, that is, the light intensity of a general LED. The intensity of the light source, the wavelength of the supplementary light is between 620 nm and 750 nm, that is, the wavelength band of red light. For example, the control unit 1 can continuously control the image fill light element 34 to emit the fill light to the human body A, or when the difference between the maximum brightness value and the minimum brightness value of the continuous image is lower than a threshold brightness, The control unit 1 then controls the image supplementary light element 34 to emit the supplementary light to the human body A. FIG.

The image fill light element 34 ensures that the light and dark changes of the continuous image are sufficiently clear and accurate, which can assist the control unit 1 to obtain the most accurate first blood pressure frequency information and second blood pressure frequency information. The image unit 3 clamps the human body A to ensure that the image capturing element 33 contacts the human body A stably, so as to prevent the image capturing element 33 from being separated from the human body A and reducing the accuracy of a subsequent updated blood pressure.

Please refer to Figure 4, Figure 7 and Figure 8, the control unit 1 obtains the image from the continuous image according to the light and dark changes of the continuous image in the first time interval [please match the control unit 1 with the first image] The first blood pressure frequency information of the human body A is obtained. The control unit 1 divides the initial blood pressure by the first blood pressure frequency information to obtain a blood vessel impedance of the human body A.

The image capturing element 33 continues to contact the human body A and acquires the continuous image of the human body A in a second time interval, for example, from the second time t ₂ to a third time t ₃ , and From the third time _t3 to a _fourth time t4. The control unit 1 obtains the second blood pressure frequency information of the human body A from the continuous image according to the light and dark changes of the continuous image in the second time interval. The control unit 1 multiplies the blood vessel impedance by the second blood pressure frequency information to obtain the updated blood pressure of the human body A in the second time interval, such as 150/98 mmHg as shown in the ninth figure.

The image capturing element 33 can also continue to contact the human body A and obtain the continuous image of the human body A in a third time interval, for example, from the fourth time t ₄ to a fifth time t ₅ . , and from the _fifth time t5 to a _sixth time t6. The control unit 1 obtains a third blood pressure frequency information of the human body A from the continuous image according to the light and dark changes of the continuous image in the third time interval. The control unit 1 multiplies the blood vessel impedance by the third blood pressure frequency information to obtain the updated blood pressure of the human body A in the third time interval, such as 146/93 mmHg as shown in the ninth figure.

Since the brighter the continuous image, the more red blood cells flow through the blood vessel, and the red blood cell flow is proportional to the blood flow, so the control unit 1 can perform the first time interval, the second time interval and the first time interval according to the continuous image. The light and dark changes in the three time intervals respectively calculate the changes of the blood flow of the human body A in the first time interval, the second time interval and the third time interval. The control unit 1 then integrates the blood flow with time, and calculates a flow time integral (volume time integral, VTI ₁ , VTI ₂ , VTI 1 , VTI 2 , respectively) in the first time interval, the second time interval, and the third time interval. VTI ₃ ), and the reciprocals of the first time interval, the second time interval and the third time interval (1/t ₂ -t ₀ , 1/t ₄ -t ₂ , 1/t ₆ -t _{4 )} respectively ) are multiplied to obtain the first blood pressure frequency information, the second blood pressure frequency information and the third blood pressure frequency information respectively. When the first time interval, the second time interval and the third time interval are one minute, the flow time integral sum is also proportional to the cardiac output of the human body A.

The control unit 1 uses the relationship between the blood pressure (unit: mmHg) equal to the blood pressure frequency information (that is, the parameter representing the cardiac output, the unit: liters per minute) multiplied by the blood vessel impedance (unit: mmHg min per liter), The blood vessel impedance is first calculated from the initial blood pressure and the first blood pressure frequency information, and then the updated blood pressure in the second time interval is calculated from the blood vessel impedance and the second blood pressure frequency information, and the blood vessel impedance and the blood pressure frequency information are used to calculate the updated blood pressure. The updated blood pressure in the third time interval is calculated from the third blood pressure frequency information.

It should be specially added that the blood pressures in the first time interval, the second time interval and the third time interval respectively include a complete heart cycle (one systole and one diastole), and the systolic blood pressure corresponds to the When the continuous image is brighter, the diastolic blood pressure corresponds to the darker continuous image. The control unit 1 can also calculate the systolic blood pressure, the diastolic blood pressure and the mean arterial pressure in the updated blood pressure, respectively. Besides, the continuous images of the first time interval, the second time interval and the third time interval can be measured before starting the calculation, and the contact image unit 3 does not need to be clamped to the human body all the time A; Alternatively, the continuous image captured by the image capturing element 33 at one time corresponds to multiple heartbeat cycles, and one heartbeat cycle can be captured to correspond to the first time interval, and the remaining heartbeat cycles are corresponding to the first time interval. It should be the second time interval and the third time interval and so on.

Please refer to the first figure and the ninth figure, after the control unit 1 obtains the updated blood pressure, it sends the updated blood pressure to the display unit 4 for display, which is convenient for the medical staff to confirm immediately, and at the same time, the initial blood pressure and the updated blood pressure are Upload to a hospital information system B to facilitate the statistics and analysis of follow-up medical information.

In actual implementation, in order to avoid reducing the accuracy of the updated blood pressure, after the initial blood pressure measurement time has passed a threshold time (for example, four hours), the medical staff can still operate the sphygmomanometer 2 to obtain the next blood pressure. The initial blood pressure is used to obtain the correct updated blood pressure in the second time interval and the third time interval of the next round.

Please refer to FIGS. 10 to 12, which show the second embodiment of the contact-type blood pressure detection device according to the embodiment of the present invention, which can be used to execute the contact-type blood pressure detection method of the present invention, and can also continuously measure the human body. A's blood pressure.

The difference between this embodiment and the first embodiment is that in the first embodiment [please match the second picture for the first embodiment], the contact blood pressure detection device includes the contact image unit 3, and the contact There are also the image capturing element 33 and the image supplementary light element 34 on the type image unit 3; and in this embodiment, the contact type blood pressure detection device includes a contact type light unit 5a, and the contact type light unit 5a On the top, a light-emitting element 51a and a light-receiving element 52a are disposed adjacently on the same side of the contact light unit 5a. The light emitting element 51a may be a light emitting diode, and the light receiving element 52a may be a photodiode.

The contact-type blood pressure detection device of this embodiment can also be used to implement the contact-type blood pressure detection method of the present invention. Since the control unit 1a, the sphygmomanometer 2a and the display unit 4a can be selected to be the same as those in the first embodiment, the appearances of the control unit 1a, the sphygmomanometer 2a and the display unit 4a are not redrawn in the drawings. .

Similar to the first embodiment, when using the contact-type blood pressure detection device to perform the contact-type blood pressure detection method, the sphygmomanometer 2a is also wrapped around the human body A for measurement, so that the control unit 1a obtains The initial blood pressure of the human A. Next, the medical staff presses the contact light unit 5a in the same manner as the contact image unit 3 of the first embodiment, so that the contact light unit 5a is clamped at the finger end of the human body A, and the light emitting element 51a and the light receiving element 52a are both in contact with the human body A. As shown in FIG.

The light-emitting element 51a first emits an incident light to the human body A, and the light-receiving element 52a obtains a reflected light of the human body A in the first time interval. The light intensity of the incident light can be the light source intensity of a general LED, The light wavelength of the incident light may be in the red light band.

According to the changes of the reflected light in the first time interval, the second time interval and the third time interval, that is, the reflection amount of the reflected light, the control unit 1a obtains the body A from the reflected light, respectively. The first blood pressure frequency information, the second blood pressure frequency information and the third blood pressure frequency information. The brighter the reflected light is, similar to the continuous image of the first embodiment, which means that the more red blood cells flow through the blood vessel, that is, the more blood flow. The control unit 1a can calculate the first time interval and the second time interval of the human body A according to the changes of the reflected light in the first time interval, the second time interval and the third time interval, respectively. and the change of blood flow in the third time interval. The control unit 1a then integrates the blood flow and time, and calculates a flow time integral (volume time integral, VTI ₁ , VTI ₂ , VTI 1 , VTI 2 , respectively) in the first time interval, the second time interval and the third time interval. VTI ₃ ), and the reciprocals of the first time interval, the second time interval and the third time interval (1/t ₂ -t ₀ , 1/t ₄ -t ₂ , 1/t ₆ -t _{4 )} respectively ) are multiplied to obtain the first blood pressure frequency information, the second blood pressure frequency information and the third blood pressure frequency information respectively.

It should be added that, after the light receiving element 52a receives the reflected light, it can first pass through a series of electronic circuit elements such as current-voltage converters, filters, amplifiers, etc. to convert the light signal into the reflected light. The electrical signal that can be read by the control unit 1a, the control unit 1a then judges the light and dark changes of the reflected light according to the magnitude of the electrical signal, but this part of the technology is Photoplethysmography (PPG), which belongs to the conventional technology , so it is not repeated here.

Same as the first embodiment, the control unit 1a first calculates the blood vessel impedance from the initial blood pressure and the first blood pressure frequency information, and then calculates the second time interval from the blood vessel impedance and the second blood pressure frequency information. the updated blood pressure, and the updated blood pressure in the third time interval is calculated from the blood vessel impedance and the third blood pressure frequency information. After the control unit 1a obtains the initial blood pressure and the updated blood pressure, it transmits the initial blood pressure and the updated blood pressure to the display unit 4a for display, and at the same time, uploads the initial blood pressure and the updated blood pressure to the hospital information system B to facilitate subsequent Statistics and analysis of medical information.

Please refer to the second figure and the tenth figure again, by the contact type blood pressure detection device and the contact type blood pressure detection method of the first embodiment and the second embodiment, whether it is obtained by the contact type image unit 3 The continuous image is still the reflected light obtained by the contact light unit 5a, the medical staff only needs to measure the initial blood pressure for the first time, and the subsequent updated blood pressure can be automatically calculated by the control units 1, 1a Therefore, the medical staff does not need to perform frequent measurements, and the image capturing element 33 of the contact image unit 3 or the light receiving element 52a of the contact light unit 5a will both contact the human body A, thus solving the problem for the medical staff At the same time of the shortage of manpower, the accuracy of the updated blood pressure is improved.

Based on the descriptions of the above embodiments, one can fully understand the operation, use and effects of the present invention, but the above-mentioned embodiments are only preferred embodiments of the present invention, which should not limit the implementation of the present invention. Scope, that is, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the description of the invention, all fall within the scope of the present invention.

1: Control unit

2: Sphygmomanometer

21: The first joint

22: The second joint

23: Airbag

24: Communicator

25: Sensor

3: Contact image unit

31: The first board

32: Second board

35: Clamping part

4: Display unit

Claims (9)

A contact-type blood pressure detection method, comprising: firstly measuring the blood pressure of a human body with a sphygmomanometer, and obtaining an initial blood pressure of the human body; then contacting the human body with an image capturing element of a contact-type image unit and obtains a continuous image of the human body in a first time interval; a control unit obtains a first blood pressure frequency information of the human body from the continuous image according to the light and dark changes of the continuous image in the first time interval; the The control unit divides the initial blood pressure by the first blood pressure frequency information to obtain a blood vessel impedance of the human body; the image capturing element contacts the human body and obtains the continuous image of the human body in a second time interval, the control unit Obtain a second blood pressure frequency information of the human body from the continuous image according to the light and dark changes of the continuous image in the second time interval; and the control unit multiplies the blood vessel impedance by the second blood pressure frequency information to obtain the human body an updated blood pressure, wherein the control unit calculates the blood pressure of the human body in the first time interval and the second time interval respectively according to the light and dark changes of the continuous image in the first time interval and the second time interval flow change, and then calculate a flow time integral in the first time interval and the second time interval respectively, and multiply by the reciprocal of the first time interval and the second time interval respectively, as the first time interval. a blood pressure frequency information and the second blood pressure frequency information. The contact-type blood pressure detection method according to claim 1, further, when the image capturing element contacts the human body and obtains the continuous image of the human body in the first time interval or the second time interval, the control unit An image supplementary light element of the contact image unit is controlled to emit supplementary light to the human body. According to the contact-type blood pressure detection method of claim 1, further, after the control unit obtains the initial blood pressure and the updated blood pressure of the human body, the initial blood pressure and the updated blood pressure are sent to a display unit for display. According to the contact-type blood pressure detection method of claim 1, further, after the control unit obtains the initial blood pressure and the updated blood pressure of the human body, upload the initial blood pressure and the updated blood pressure to a hospital information system. A contact type blood pressure detection device is used to continuously measure the blood pressure of a human body. The contact type blood pressure detection device comprises: a control unit; a sphygmomanometer, the signal is connected to the control unit, and the blood pressure meter measures the human body to obtain an initial blood pressure of the human body; and a contact image unit, the signal is connected to the control unit, the contact image unit includes an image capture element, the image capture element selectively contacts the human body; the sphygmomanometer first After measuring the blood pressure of the human body to obtain the initial blood pressure, the image capturing element contacts the human body again and obtains a continuous image of the human body in a first time interval. For changes in light and dark in a time interval, a first blood pressure frequency information of the human body is obtained from the continuous image, and a blood vessel impedance of the human body is obtained by dividing the initial blood pressure by the first blood pressure frequency information; the image capturing element contacting the human body and obtaining the continuous image of the human body in a second time interval, the control unit obtains a second blood pressure frequency of the human body from the continuous image according to the light and dark changes of the continuous image in the second time interval information, the control unit multiplies the blood vessel impedance by the second blood pressure frequency information to obtain an updated blood pressure of the human body, wherein the control unit determines the blood pressure in the second blood pressure according to the continuous image Changes in light and shade in a time interval and in the second time interval, respectively calculate the changes in the blood flow of the human body in the first time interval and the second time interval, and then calculate the first time interval and the second time interval respectively. A flow time integral in the time interval is multiplied by the reciprocals of the first time interval and the second time interval, respectively, to serve as the first blood pressure frequency information and the second blood pressure frequency information. According to the contact type blood pressure detection device of claim 5, further, the contact type image unit has an image supplementary light element; when the image capture element contacts the human body and obtains the human body in the first time interval or the second time During the continuous images in the interval, the control unit controls the image supplementary light element to emit supplementary light to the human body. The contact-type blood pressure detection device of claim 6, wherein the light intensity of the supplementary light is between 0.1 candela and 20 candlelight, and the light wavelength of the supplementary light is between 620 nanometers and 750 nanometers. The contact-type blood pressure detection device according to claim 5, further, the contact-type image unit has two opposite plates, one end of the plate is combined with a pivot element so that the plate can pivot relative to each other, and the plate The other end of the component has a clamping portion for clamping the human body, and the image capturing element is located on the clamping portion of one of the plate components. A contact type blood pressure detection method, comprising: firstly measuring the blood pressure of a human body with a sphygmomanometer, and obtaining an initial blood pressure of the human body; then contacting the human body with a light emitting element of a contact light unit and Sending an incident light to the human body; a light-receiving element of the contact light unit obtains a reflected light of the human body in a first time interval; a control unit changes according to the brightness of the reflected light in the first time interval , obtains a first blood pressure frequency information of the human body from the reflected light; the control unit divides the initial blood pressure by the first blood pressure frequency information to obtain a blood vessel impedance of the human body; The light-receiving element contacts the human body and obtains the reflected light of the human body in a second time interval, and the control unit obtains a reflection light of the human body from the reflected light according to the light and dark changes of the reflected light in the second time interval second blood pressure frequency information; and the control unit multiplies the blood vessel impedance by the second blood pressure frequency information to obtain an updated blood pressure of the human body, wherein the control unit obtains an updated blood pressure of the human body according to the reflected light in the first time interval and the second time interval Light and dark changes in the time interval, respectively calculate the blood flow changes of the human body in the first time interval and the second time interval, and then calculate the first time interval and the second time interval respectively. A flow time in the time interval Integrate and multiply by the reciprocal numbers of the first time interval and the second time interval, respectively, to obtain the first blood pressure frequency information and the second blood pressure frequency information.

Images