Pulse pressure measuring device

Abstract

To enhance measurement accuracy by providing a pulse pressure measuring device that determines a blood vessel route.SOLUTION: A pulse pressure measuring device 1 includes a plurality of pressing members 11, 12, 13, and 14, a plurality of pressure sensors, and a processing unit 100. The pressing members are used for pressing measurement object parts, each of the pressing members having position coordinates Pi(i=1,2,3...). The pressure sensors are arranged so as to measure the pressure on the pressing members respectively, and generate pressure measurement values Ii(i=1,2,3...) at the position coordinates Pi(i=1,2,3...) respectively. The processing unit determines a blood vessel route using the position coordinates Pi(i=1,2,3...) and the pressure measurement values Ii(i=1,2,3...).SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a pulse pressure measuring device. [Background technology]

[0002] In traditional Chinese medicine, doctors place their fingers on a patient's wrist to apply pressure, detecting changes in the pulse wave, and then synthesize all the information to complete a diagnosis. However, diagnoses are based on the doctor's personal clinical experience, and standards often vary. Therefore, there is a need for an objective, quantifiable pulse pressure measuring device. Pulse pressure measuring devices on the market do not determine the vascular pathway and have low measurement accuracy. Summary of the Invention [Problem to be solved by the invention]

[0003] By providing a pulse pressure measuring device that determines the blood vessel path, measurement accuracy is improved. [Means for solving the problem]

[0004] The present invention provides a pulse pressure measuring device that determines the blood vessel path and has good measurement accuracy.

[0005] According to one embodiment of the present invention, a pulse pressure measuring device is provided, which includes a base, a plurality of pressing members, a plurality of pressure sensors, and a processing unit. The pressing members are arranged in an array on the base and are used to press the measurement target region, of which the number of pressing members is at least four, and each pressing member has a position coordinate P i (i=1, 2, 3...). The pressure sensors are arranged to measure the pressure on the pressing member, and each has a position coordinate P i Pressure measurement I at (i=1,2,3...) i (i=1, 2, 3...). The processing unit is connected to the pressing member and the pressure sensor. In the blood vessel path determination stage, the processing unit generates the position coordinate P i Any three of (i=1,2,3...) and the corresponding three pressure measurements Ii , I j , I k (i,j,k=1,2,3... and i≠j≠k) are used to calculate multiple weighted coordinates G ijk where

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[0006] According to one embodiment of the present invention, a pulse pressure measuring device is provided, which includes a base, a plurality of pressing members, a plurality of pressure sensors, and a processing unit. The pressing members are arranged in an array on the base and are used to press the measurement target region, of which the number of pressing members is at least four, and each pressing member has a position coordinate P i (i=1, 2, 3...). The pressure sensors are arranged to measure the pressure of the pressing members, and each has a position coordinate P i Pressure measurement I at (i=1,2,3...) i (i=1, 2, 3...). The processing unit is connected to the pressing member and the pressure sensor. In the blood vessel path determination step, the processing unit defines a plurality of virtual circles, each of which has a position coordinate P i (i=1,2,3...) are the centers of the circles, and the pressure measurement values ​​I i The radius is defined as the inverse square root of (i=1, 2, 3...). The processing unit further defines a plurality of common instan- tance lines between the virtual circles. The virtual circles are shrunk or enlarged at the same ratio until at least two common instan- tance lines overlap each other, and a blood vessel path of the measurement target site is defined based on the overlapping common instan- tance lines. [Effects of the Invention]

[0007] Based on the above, the pulse pressure measuring device provided by the embodiment of the present invention uses multiple pressing members and multiple pressure sensors to obtain the blood vessel path, and compared with conventional pulse pressure measuring devices that do not determine the blood vessel path, the pulse pressure measuring device provided by the embodiment of the present invention can more accurately measure the pulse wave at the measurement target site.

[0008] In order to make the above-mentioned features and advantages of the present invention more comprehensible, embodiments accompanied with drawings are described in detail below. [Brief explanation of the drawings]

[0009] [Figure 1A] 1 is a schematic diagram of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 1B] 1 is a block diagram of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 1C] 1A and 1B illustrate the use of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 2A] 1 is a schematic diagram of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 2B] 1 is a diagram illustrating a method for determining a blood vessel path according to an embodiment of the present invention. [Figure 3A] FIG. 10 is a diagram illustrating a blood vessel path determination method according to a second embodiment of the present invention. [Figure 3B] FIG. 10 is a diagram illustrating a blood vessel path determination method according to a second embodiment of the present invention. [Figure 3C] FIG. 10 is a diagram illustrating a blood vessel path determination method according to a second embodiment of the present invention. [Figure 3D] FIG. 10 is a diagram illustrating a blood vessel path determination method according to a second embodiment of the present invention. [Figure 3E] FIG. 10 is a diagram illustrating a blood vessel path determination method according to a second embodiment of the present invention. [Figure 4] 1 is a schematic diagram of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 5] FIG. 1 illustrates a pulse wave optimization method according to an embodiment of the present invention. [Figure 6A] 1 is a schematic diagram of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 6B]1 is a schematic diagram of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 7A] 1 is a schematic diagram of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 7B] 1 is a schematic diagram of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 7C] 1 is a schematic diagram of a pulse pressure measuring device according to an embodiment of the present invention. [Figure 8] 1 is a schematic diagram of a pulse pressure measuring device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] 1A to 1C, according to an embodiment of the present invention, there is provided a pulse pressure measuring device 1 including a base 10, a plurality of pressure members 11, 12, 13, and 14 arranged in an array on the base 10, a plurality of pressure sensors 21, 22, 23, and 24 housed inside the base 10, and a processing unit 100. The pressure members 11, 12, 13, and 14 are used to press against a measurement target site. In some embodiments, the pulse pressure measuring device 1 may be attached to a hand by a fixing member 30 as shown in FIG. 1C, and the measurement target site may be, but is not limited to, the wrist. The pressure sensors 21, 22, 23, and 24 are used to measure the pressure on the pressure members 11, 12, 13, and 14, respectively. The processing unit 100 is connected to the pressing members 11, 12, 13, and 14 and the pressure sensors 21, 22, 23, and 24, thereby controlling the pressing members 11, 12, 13, and 14 to perform a pressing process and reading measurement data from the pressure sensors 21, 22, 23, and 24. For ease of understanding, the embodiments shown in FIGS. 1A to 1C show four pressing members 11, 12, 13, and 14 and four pressure sensors 21, 22, 23, and 24, but the present invention is not limited to this. In each embodiment of the present invention, the number of pressing members and pressure sensors may be four or more.

[0011] Continuing, referring simultaneously to FIGS. 1A, 1B, 2A and 2B, a method for determining a vascular path according to one embodiment of the present invention is provided.

[0012] In the first embodiment, the pressing members 11, 12, 13, and 14 are respectively disposed at different position coordinates P1(x,y), P2(x,y), P3(x,y), and P4(x,y) on the base 10. In the blood vessel path determination stage, the pressure sensors 21, 22, 23, and 24 measure pressure measurements I1, I2, I3, and I4, respectively, as the pressing members 11, 12, 13, and 14 perform the pressing process, where the pressure measurements I1, I2, I3, and I4 correspond to the position coordinates P1(x,y), P2(x,y), P3(x,y), and P4(x,y), respectively.

[0013] Then, based on the principle that the strength of the sensing signal decreases as the distance between the signal source and the sensor increases, the processing unit 100 uses any three of the position coordinates P1(x,y), P2(x,y), P3(x,y), and P4(x,y) and the corresponding three of the pressure measurements I1, I2, I3, and I4 to generate a plurality of weighted coordinates G as shown below: 123 (x,y), G 124 (x,y), G 134 (x,y), G 234 (x,y), where P1, P2, P3, and P4 represent P1(x,y), P2(x,y), P3(x,y), and P4(x,y), respectively:

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[0014] Then, the processing unit 100 calculates the weighted coordinates G 123 (x,y), G 124 (x,y), G 134 (x,y), G 234 A plurality of linear equations passing through (x, y) are defined. These linear equations are the lines L1 to L6 as shown in FIG. 2B. Among them, the line L1 is the weighted coordinate G 123 (x,y) and G 124 (x, y) and the line L2 passes through the weighted coordinate G 134 (x,y) and G 234 (x, y) and the line L3 passes through the weighted coordinate G 124 (x,y) and G 134 (x, y) and the line L4 passes through the weighted coordinate G123 (x,y) and G 234 (x, y) and the line L5 passes through the weighted coordinate G 123 (x,y) and G 134 (x, y) and the line L6 passes through the weighted coordinate G 124 (x,y) and G 234 Passes through (x,y).

[0015] Furthermore, the processing unit 100 reasonably estimates the direction of the blood vessel path at the measurement target site based on the mounting direction of the pulse pressure measuring device 1, and defines a belt-like section by the straight lines L1 to L6 having a gradient within a range of ±0.5 with respect to the reference line BS (for example, the straight lines L1, L2, L3, and L4 shown in FIG. 2B ). Here, the reference line BS is the central axis of symmetry of the pulse pressure measuring device 1 (see FIG. 2A ) and defines a line with a gradient of 0. Specifically, as shown in FIG. 2B , the straight lines L1 and L2 define a belt-like section B1. It should be noted that, although the straight lines L5 and L6 define another belt-like section as shown in FIG. 2B , it is reasonably estimated that the blood vessel path at the measurement target site is not within the belt-like section defined by the straight lines L5 and L6, taking into account the mounting direction of the pulse pressure measuring device 1. Therefore, the gradient of the straight lines used to define the belt-like section is limited as described above.

[0016] Then, the processing unit 100 calculates the weighted coordinate G 123 (x,y), G 124 (x,y), G 134 (x,y), G 234 Calculate the barycentric coordinate G5(x,y) of (x,y), where the x coordinate of the barycentric coordinate G5(x,y) is the weighted coordinate G 123 (x,y), G 124 (x,y), G 134 (x,y), G 234 The average value of the x coordinate of (x,y) and the y coordinate of the center of gravity coordinate G5(x,y) are all the weighted coordinates G 123 (x,y), G 124 (x,y), G 134 (x,y), G 234 The average value of the y coordinate of (x,y).

[0017] The processing unit 100 then determines the blood vessel path BL at the measurement site by defining the average value of the slopes of the lines L1 and L2 that define the strip section B1 and the barycentric coordinate G5(x,y). The slope of the blood vessel path BL is the average value of the slopes of the lines L1 and L2, and the blood vessel path BL passes through the barycentric coordinate G5(x,y). It should be noted that the blood vessel path BL does not refer to the actual blood vessel path within the measurement site, but rather to a path on a plane on which the pressing members 11, 12, 13, and 14 are located, corresponding to the actual blood vessel path. Compared to conventional pulse pressure measuring devices that do not determine the blood vessel path, the pulse pressure measuring device 1 provided by the embodiment of the present invention can more accurately measure the pulse wave at the measurement site based on the blood vessel path BL obtained using the pressing members 11, 12, 13, and 14 and the pressure sensors 21, 22, 23, and 24.

[0018] In some embodiments, to improve the accuracy of the blood vessel path determination step and reduce noise interference, the spacing between the pressing members 11, 12, 13, and 14 in the direction parallel to the reference line BS is 30 mm or less, and the spacing between them in the direction perpendicular to the reference line BS is also 30 mm or less, thereby avoiding attenuation of the intensity of the pulse pressure or noise interference that could result in a reduction in measurement accuracy due to a long transmission distance.

[0019] In some embodiments, in the above-mentioned vascular path determination stage, each of the above-mentioned multiple pressing members 11, 12, 13, and 14 simultaneously presses the measurement target area to generate a pulse pressure with a relatively high intensity, thereby improving the measurement accuracy of the pulse pressure measuring device 1.

[0020] Continuing, referring simultaneously to FIGS. 1A, 1B, 3A, 3B, 3C, 3D and 3E, another method for determining a blood vessel path is provided according to a second embodiment of the present invention.

[0021] In the second embodiment, the pressing members 11, 12, 13, and 14 are respectively disposed at different position coordinates P1(x,y), P2(x,y), P3(x,y), and P4(x,y) on the base 10. In the blood vessel path determination stage, the pressure sensors 21, 22, 23, and 24 measure pressure measurements I1, I2, I3, and I4, respectively, as the pressing members 11, 12, 13, and 14 perform the pressing process, where the pressure measurements I1, I2, I3, and I4 correspond to the position coordinates P1(x,y), P2(x,y), P3(x,y), and P4(x,y), respectively.

[0022] Next, based on the principle that the intensity of the sensing signal is inversely proportional to the square of the distance between the signal source and the sensor, it can be seen that the distance between the signal source and the sensor is inversely proportional to the square root of the intensity of the sensing signal. Furthermore, based on the mounting direction of the pulse pressure measuring device 1, the pressing members 11 and 13 correspond to the same pulse wave source, and the pressing members 12 and 14 correspond to the same pulse wave source. The distances between the pressing members 11 and 13 and the pulse wave sources respectively have a proportional relationship 1 / (I1) 1 / 2 :1 / (I3) 1 / 2 and the distance between each of the pressing members 12, 14 and the pulse wave source has a proportional relationship 1 / (I2) 1 / 2 :1 / (I4) 1 / 2 Based on this, the processing unit 100 calculates a circle with a center at the position coordinate P1(x, y) and a radius of 1 / (I1) as shown in FIG. 3A. 1 / 2 Define a virtual circle R1 with the position coordinate P3(x,y) as the center of the circle and the radius of the circle is 1 / (I3) 1 / 2 Define a virtual circle R3, and define a common instan- tance L between the virtual circle R1 and the virtual circle R3. 13 and the common intangent L 31 Similarly, as shown in FIG. 3A, the processing unit 100 defines a circle with the position coordinate P2(x, y) as the center and the radius of the circle as 1 / (I2) 1 / 2 Define a virtual circle R2 with the position coordinate P4(x,y) as the center of the circle and the radius of the circle is 1 / (I4) 1 / 2 Define a virtual circle R4, and define a common instan- tance L between the virtual circle R2 and the virtual circle R4. 24 and the common intangent L 42 where the common inscribed line L 13 and the common intangent L31 corresponds to the same pulse wave source, and the common instan- tance L 24 and the common intangent L 42 correspond to the same pulse wave source.

[0023] 3A to 3D, the processing unit 100 then simultaneously expands (or contracts) the imaginary circles R1, R2, R3, and R4 at the same ratio until the common instangents corresponding to the different pulse wave sources overlap each other.

[0024] Specifically, as shown in FIG. 3D, the common inscribed line L 13 (and the common intangent L 31 ) and the common intangent L 42 and overlap each other, where the common instangent L 13 (and the common intangent L 31 ) and the common intangent L 42 corresponds to a different pulse wave source. In this case, the radius of the virtual circle R1 is 1 / (I1) 1 / 2 C1 times (i.e., C1 / (I1) 1 / 2 ) and the radius of the imaginary circle R2 is 1 / (I2) 1 / 2 C1 times (i.e., C1 / (I2) 1 / 2 ) and the radius of the imaginary circle R3 is 1 / (I3) 1 / 2 C1 times (i.e., C1 / (I3) 1 / 2 ) and the radius of the imaginary circle R4 is 1 / (I4) 1 / 2 C1 times (i.e., C1 / (I4) 1 / 2 ), where the multiple C1 is any number greater than 0.

[0025] Finally, the processing unit 100 defines the straight line defined by the overlapping common instangent lines as the blood vessel path BL, as shown in Figures 3D and 3E. It should be noted that the blood vessel path BL does not refer to the actual blood vessel path within the measurement target region, but rather refers to a path on a plane that corresponds to the actual blood vessel path and on which the pressing members 11, 12, 13, and 14 are located. Compared to conventional pulse pressure measuring devices that do not determine the blood vessel path, the pulse pressure measuring device 1 provided by the embodiment of the present invention can more accurately measure the pulse wave at the measurement target region based on the blood vessel path BL obtained using the pressing members 11, 12, 13, and 14 and the pressure sensors 21, 22, 23, and 24.

[0026] In some embodiments, in order to improve the accuracy of the blood vessel path determination step and reduce noise interference, the spacing between the pressing members 11, 12, 13, and 14 in one direction is 30 mm or less, and the spacing between them in another direction perpendicular to the first direction is also 30 mm or less, thereby avoiding attenuation of the intensity of the pulse pressure or noise interference that could reduce measurement accuracy due to a long transmission distance.

[0027] In some embodiments, in the above-mentioned vascular path determination step, each of the above-mentioned multiple pressing members 11, 12, 13, and 14 simultaneously presses the measurement target area to generate a pulse pressure with a relatively high intensity, thereby improving the measurement accuracy of the pulse pressure measuring device 1.

[0028] 4 and 5, when the pulse pressure measuring device 1 is attached to the measurement target area, the processing unit 100 defines multiple virtual lines A1, A2, and A3 based on a built-in database or user settings. Points P1, P2, and P3 where the virtual lines A1, A2, and A3 intersect with the blood vessel path BL may correspond to multiple pulse wave sources within the measurement target area. In some embodiments, the measurement target area is the wrist, and the virtual lines A1, A2, and A3 are three parallel lines spaced 1.0 cm to 1.2 cm apart, corresponding to the three pulse wave sources on the wrist, but are not limited thereto. In some embodiments, the measurement target area is another part of the human body, and the number of virtual lines is not limited to three, and the distance between the multiple virtual lines is not limited. During the pulse wave measurement step of the pulse pressure measuring device 1, the processing unit 100 determines which pressing member and corresponding pressure sensor should be used to measure the pulse wave of a specific pulse wave source based on the positions of the pressing members 11, 12, 13, and 14 and the positions of the points P1, P2, and P3.

[0029] In one embodiment, the processing unit 100 performs a pulse wave measurement on the pulse wave source corresponding to point P3 using the pressing member 12 and the pressure sensor 22 to obtain the pulse wave diagram shown in the upper part of Fig. 5, whose amplitude is I0. The processing unit 100 also multiplies I0 by a multiple C2 to obtain the true amplitude of the pulse wave generated by the pulse wave source, where the multiple C2 is the square root of the ratio of the shortest distance between the pressing member 12 and the blood vessel path BL to the multiple C1.

[0030] In other embodiments in which pulse wave measurements are performed using different pressing members and pressure sensors, the true amplitude can be obtained based on the measured amplitude in a manner similar to that described above. For example, if the processing unit 100 selects the pressing member 14 and pressure sensor 24 to perform pulse wave measurements on the pulse wave source corresponding to point P2 and obtains a pulse wave diagram with an amplitude of I0 shown in the upper part of Figure 5, the processing unit 100 may multiply I0 by a multiple C2 to obtain the true amplitude of the pulse wave generated by the pulse wave source, where C2 is the square root of the ratio of the multiple C1 to the shortest distance between the pressing member 14 and the blood vessel path BL. Other cases can also be deduced similarly.

[0031] 6A and 6B, in some embodiments, the pulse pressure measuring device 1 may include two pressing members PE1, two pressing members PE2, and two pressing members PE3, and the six pressing members PE1, PE2, and PE3 may be staggered as shown in FIG. 6A or aligned as shown in FIG. 6B. Arranging a relatively large number of pressure sensors can improve the measurement accuracy of the pulse pressure measuring device 1. During the pulse wave measurement stage of the pulse pressure measuring device 1, the paired two pressing members PE1, the paired two pressing members PE2, or the paired two pressing members PE3 may simultaneously perform pressing processes at the same pressure value.

[0032] 7A, 7B, and 7C, in some embodiments, the pulse pressure measuring device 1 may include nine pressing members PE, and the nine pressing members PE may be arranged irregularly as shown in Fig. 7A, aligned as shown in Fig. 7B, or staggered in a regular arrangement as shown in Fig. 7C. During the pulse wave measurement stage of the pulse pressure measuring device 1, the multiple pressing members PE may simultaneously perform pressing processes at the same pressure value.

[0033] 8, in some embodiments, the pulse pressure measuring device 1 may include a base 10P, and the multiple pressing members PE of the pulse pressure measuring device 1 are disposed on a curved surface of the base 10P. The pulse pressure measuring device 1 may further include a display screen 10D to display pulse pressure data.

[0034] In summary, the pulse pressure measuring device provided by the embodiment of the present invention acquires the blood vessel path using multiple pressing members and multiple pressure sensors, and can more accurately measure the pulse wave at the measurement target site than conventional pulse pressure measuring devices that do not determine the blood vessel path. [Industrial Applicability]

[0035] The pulse pressure measuring device provided by the embodiment of the present invention can be applied to medical diagnosis. [Explanation of symbols]

[0036] 1: Pulse pressure measuring device 10, 10P: Bass 10D: Display screen 11, 12, 13, 14, PE, PE1, PE2, PE3: Pressing members 21, 22, 23, 24: Pressure sensors 30: Fixing member 100: Processing unit A1, A2, A3: Virtual lines BI: Band section BL: vascular pathway BS: Baseline G 123 (x,y), G124 (x, y), G 134 (x, y), G 234 (x, y): Load coordinates G5(x, y): Center of gravity coordinates I0: Amplitude L1 to L6: Straight lines P1, P2, P3: Points R1, R2, R3, R4: Virtual circles L 13 , L 31 , L 24 , L 42 : Common inscribed line

Claims

1. With the base, At least four of the sensors are arranged in an array on the base and are used to press the measurement target portion, and each of the sensors has a position coordinate P ｉ A plurality of pressing members, each having i=1, 2, 3, . . .; By measuring the pressure on each of the plurality of pressing members, the plurality of position coordinates P ｉ Pressure measurement value I (i = 1, 2, 3...) ｉ a plurality of pressure sensors generating (i=1, 2, 3...); a processing unit connected to the plurality of pressing members and the plurality of pressure sensors; Including, In the blood vessel path determination step, the processing unit defines a plurality of virtual circles, where the plurality of virtual circles are respectively defined by the plurality of position coordinates P ｉ (i=1, 2, 3, . . .) is the center of a circle, and the radii of the plurality of imaginary circles are the pressure measurement values ​​I ｉ (i=1, 2, 3...) is proportional to the value of the inverse square root of the processing unit further defines a plurality of common instangent lines between the plurality of virtual circles, reduces or expands the plurality of virtual circles at the same ratio until at least two of the common instangent lines overlap with each other, and defines a blood vessel path of the measurement target site based on the plurality of common instangent lines that overlap with each other. Pulse pressure measuring device.

2. The plurality of overlapping common instan- tance lines defining the blood vessel path of the measurement target region are arranged at least four positions P ｉ (i=1, 2, 3...) The pulse pressure measuring device according to claim 1 .

3. The plurality of overlapping common inscribed lines defining the vascular path correspond to different pulse wave sources. The pulse pressure measuring device according to claim 1 .

4. In the blood vessel path determining step, each of the plurality of pressing members simultaneously presses the measurement target region. The pulse pressure measuring device according to claim 1 .

5. The intervals between the plurality of pressing members in a first direction and in a second direction perpendicular to the first direction are 30 millimeters or less. The pulse pressure measuring device according to claim 1 .

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