JP2000166883A - Trestle for blood pressure measurement provided with automatic height control function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trestle for blood pressure measurement provided with an automatic height control function with no lowering in accuracy of blood pressure measurement, related to displacement of position of height of a mounted site of an arm band to the heart. SOLUTION: A support stand 38 provided freely movably in the vertical directions on a base 36 and for supporting an upper arm 18 is moved for changing the position in the vertical directions by means of a drive device 42 and driving the drive device 42 is controlled, based on an output signal of a photoelectric sensor 78 (height position detecting device) by means of a height position control device 80, in such a way that an arm band 22 wound on the upper arm 18 of a subject 16 is supported at a height related to the height of the heart of the subject 16 by the support stand 38. As a psult, since the height position of the arm band 22 is automatically controlled so as to bring the arm band 22 wound on the brachium 18 of the living body 16 to the height of the heart of the subject 16, the drop in the accuracy of blood pressure measurement related to the displacement of the height position of the mounted site of the arm band 22 to the heart is solved properly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood pressure measurement base for supporting an upper arm of a living body on which a cuff is wound when measuring blood pressure, and to automatically increase the supporting height of the upper arm to increase blood pressure measurement accuracy. It is related to the technology of adjusting dynamically.

[0002]

2. Description of the Related Art As a method of measuring the blood pressure of a living body, the compression pressure at the time of generation and disappearance of Korotkoff sound generated in the process of continuously changing the compression pressure of the arm band wound around the upper arm to compress the artery is considered. The Kotrokov sound method (JIS T 1115), which determines the systolic and diastolic blood pressure based on, or the amplitude of the pulsation of the compression pressure generated in synchronization with the heartbeat in the process of continuously changing the compression pressure of the arm band An oscillometric method (JIS) that determines systolic and diastolic blood pressure values based on
T 1115) is known. In these blood pressure measurement methods, the height position of the compression part of the arm band substantially coincides with the height position of the heart of the living body so that the measured blood pressure value can be treated as the aortic pressure in the living body. It is executed as a premise.

[0003]

However, in many cases, the height position of the mounting portion of the arm band wound around the upper arm of the living body does not always coincide with the height position of the heart. For example, when the arm band is attached to the upper arm of the living body prior to the measurement, the arm band is at a predetermined angle with respect to the lower side region, that is, the upper arm of the upper arm region, unless intentionally performed. Since it is worn on the part adjacent to the forearm to be formed, the height position of the wearing part of the arm band tends to be lower than the height position of the heart, so in such a case, it is obtained by measurement. The blood pressure value is shifted to a higher side than the blood pressure value in the aorta, and there is a disadvantage that the blood pressure measurement accuracy is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent a decrease in blood pressure measurement accuracy associated with a shift in a height position of a part where a cuff is attached to a heart. It is an object of the present invention to provide a blood pressure measurement stand having an automatic height adjustment function.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a blood pressure measurement for supporting a cuff wound around an upper arm of a living body in a cylindrical shape when measuring blood pressure. A gantry comprising: (a) a base; (b) a support pedestal provided on the base so as to be vertically movable to support the upper arm; and (c) a vertical movement position of the support. A drive device that changes the height of the living body, and a height position detection device that detects a preset height position related to the height of the heart of the living body,
(e) based on an output signal of the height position detecting device, so that the support base supports the arm band wound around the upper arm of the living body at a height related to the height of the heart of the living body. And a height position control device that drives and controls the driving device.

[0006]

According to this structure, the support base which is provided on the base movably in the vertical direction and supports the upper arm can be moved by the driving device to change its position in the vertical direction. The height position control device controls the output of the height position detection device so that the support base supports the arm band wound around the upper arm of the living body at a height related to the height of the heart of the living body. The driving of the driving device is controlled based on the signal.
For this reason, the height position of the arm band is automatically adjusted so that the arm band wound around the upper arm of the living body is at the height of the heart of the living body. A decrease in blood pressure measurement accuracy associated with the deviation is suitably eliminated.

[0007]

In another aspect of the present invention, preferably, the height position detecting device is provided so as to move up and down together with the support table and is mounted at a predetermined position related to the height of the heart of the living body. The detected member is detected. With this configuration, the driving device drives the support base until the detected member is detected by the height position detecting device, so that the height position of the arm band wound around the upper arm of the living body is automatically set in the living body. There is an advantage that is said to be the height of the heart.

[0008] Preferably, the height position detecting device is provided so as to move up and down together with the support table to detect the shoulder of the living body. With this configuration, the height position of the arm band wound around the upper arm of the living body is automatically set to the heart position of the living body even if the detected member is not attached to a preset position related to the height of the heart. And height. Further, there is an advantage that the detection member is not affected by a variation in the mounting position.

[0009] Preferably, the arm band wound in a cylindrical shape is supported by the support base so as to be rotatable around a substantially horizontal axis perpendicular to the upper arm. With this configuration, the arm band is attached to the upper arm irrespective of the height position of the support base, as compared with the case where the arm band wound in a cylindrical shape is supported by the support base so that the axis is constant. The contact between the upper and lower parts of the arm band is reduced, so that the sense of incongruity is eliminated and the decrease in measurement accuracy due to the contact is eliminated.

Preferably, the support is supported by a support standing upright on the base and supported by the support so as to be rotatable about a substantially vertical axis. . In this way, compared to the case where the support base is fixed and supported on the support, regardless of the position on the floor of the support base, one side of the left and right parts of the arm band attached to the upper arm Is alleviated, the sense of incongruity is eliminated, and the decrease in measurement accuracy due to the one-sided contact is eliminated.

[0011]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a use state of a cuff device 12 supported by a gantry 10 according to an embodiment of the present invention, and an automatic blood pressure measurement device 14 connected thereto. In the figure,
The arm band device 12 is configured such that the upper arm 18 of the living body 16 in a posture sitting on a chair 15 is inserted therethrough when measuring the blood pressure. For example, as shown in FIG.
0, and a cylindrical arm band 22 provided on the inner peripheral side thereof. The arm band 22 includes a flexible belt 24 that is wound in a cylindrical shape and can be reduced in diameter by tightening, and an inflation bag 26 provided on all or a part of the inner peripheral surface of the flexible belt 24. Have. This inflatable bag 26 is a hose 28
Is connected to the automatic blood pressure measurement device 14 via the.

The automatic blood pressure measurement device 14 includes a so-called microcomputer including a CPU, a ROM, a RAM, and an interface (not shown).
The input signal is processed according to the program stored in the ROM in advance to determine the blood pressure value while utilizing the temporary storage function,
It is displayed on the display 30. That is, when the blood pressure measurement start operation is performed, air is pumped from the air pump to the inflation bag 26 to rapidly increase the compression pressure on the upper arm, and the compression pressure is set higher than the maximum blood pressure value. At the same time, the air pump is stopped, and at the same time, the air in the inflation bag 26 is gradually discharged from the exhaust control valve to gradually reduce the compression pressure at a predetermined pressure reduction rate, for example, about 5 mmHg / sec, In the course of the slow pressure drop, a pulse wave, which is a pulsating component included in the compression pressure of the inflatable bladder 26, is extracted by a band-pass filter, and the amplitude of the pulse wave is stored. The compression pressure at that time is determined as a blood pressure value and is displayed.

The gantry 10 includes a base 36 mounted on a floor 34 with casters 32 selectively turned and braked, and a vertically movable base 36 with respect to the base 36. A driving device 4 for driving the supporting table 38 provided and the supporting table 38 for changing the vertical movement position of the supporting table 38, that is, the column 40 for supporting the same.
2 is provided. As shown in FIG. 2, the support base 38 allows the arm band device 12 to be relatively rotatable about a substantially horizontal axis perpendicular to the upper arm 18 at a central portion in the axial direction of the housing 20. The arm band device 12 is supported via a pin 44. Thereby, the arm band 22 wound in a cylindrical shape in the housing 20 is also supported by the support base 38.
, So as to be relatively rotatable about a substantially horizontal axis. The support table 38 is supported by a support column 40 so as to be rotatable around a pin 46 so as to be rotatable about a substantially vertical axis.

Further, in the driving device 42, as shown in detail in FIG. 3, the column 40 is slidably fitted into a tubular member 50 fixed to the base 36 so as to protrude vertically. The guide rod 52 fixed to the support column 40 and extending in a direction parallel to the axial direction is fitted into a guide hole 56 provided in a guide member 54 fixed to the tubular member 50, whereby the above-described operation is performed. The relative rotation between the support post 40 and the tubular member 50 into which the support post 40 is fitted is prevented. Thus, the column 40 is provided on the base 36 so as to be freely movable in the vertical direction without being able to rotate around its axis. A male screw 58 is formed on the outer peripheral surface of the support column 40, and the male screw 58 is formed with an outer peripheral tooth 60 and is a nut that is brought into contact with the upper end surface of the tubular member 50 via a sliding ring 62. 64 is screwed. The pinion 70 fixed to the output shaft 68 of the electric motor 66 provided on the tubular member 50 is engaged with the outer peripheral teeth 60 of the nut 64. Accordingly, when the nut 64 is relatively rotated by the electric motor 66 with respect to the support column 40 and the screwing position of the nut 64 is changed, the support base 38 and the arm band 22 supported by the support column 40 are moved up and down. The directional or height position is adjusted. Reference numeral 72 denotes a cover of the driving device 42.

As shown in FIG. 1, in the living body 16, a height position for detecting a preset height position related to the height of the heart of the living body, in this embodiment, the position of the heart is:
For example, a detected member 76 composed of a reflective tape, a reflective label, a reflective mark, or the like is mounted. Also, as shown in FIG. 2, a photoelectric sensor 78 for optically detecting the detected member 76 is provided near the pin 44 of the support base 38, that is, in the axial direction of the cylindrical housing 20 or the arm band 22. It is provided at substantially the same height as the height of the center. The detected member 76 is, for example, one in which a large number of glass beads are fixed in the surface layer, and has a property of emitting reflected light toward the light source of the projected light. In addition, the photoelectric sensor 78 emits a flat projection beam that spreads at a relatively small angle in the vertical direction and a relatively large angle in the horizontal direction in the horizontal direction, and emits reflected light from the detected member 76. The light is detected and detected. Usually, in the photoelectric sensor 78, modulated light of infrared light is used as a projection beam in order to reduce the influence of extraneous light.

The height position control device 80 shown in FIG. 4 is constituted by, for example, a microcomputer in the automatic blood pressure measurement device 14, and an automatic height adjustment start button 82 is operated before starting the blood pressure measurement. Then, the electric motor 66 is operated until the photoelectric sensor 78 detects the detected member 76 attached to the living body.
When the detected member 76 is detected by the
6 is automatically stopped. Thereby, the height position of the central portion of the arm band 22 in the axial direction is automatically set to the detected member 7.
6 and the same height. If the automatic height adjustment stop button 84 is operated to stop the automatic height adjustment for some reason, the height position controller 80 stops the operation of the electric motor 66 preferentially.

As described above, according to the present embodiment, the base 3
The support base 38 movably provided in the up and down direction and supporting the upper arm 18 is moved by the driving device 42 to change the position in the up and down direction. The height position control device 80 controls the photoelectric sensor (height position detection device) 78 so that the support base 38 supports the arm band 22 wound around the upper arm 18 of the living body 16 at a height related to the height. The driving of the driving device 42 is controlled based on the output signal. For this reason, the upper arm 1 of the living body 16
The height position of the arm band 22 is automatically adjusted so that the arm band 22 wound around 8 is at the height of the heart of the living body 16. A decrease in blood pressure measurement accuracy associated with the deviation is suitably eliminated.

Further, according to the present embodiment, the photoelectric sensor (height position detecting device) 78 is provided so as to move up and down together with the support table 38, and a predetermined position related to the height of the heart of the living body 16 is set. Since the detected member 76 attached to the living body 16 is detected, the driving device 42 drives the support base 36 until the detected member 76 is detected by the photoelectric sensor 78, so that the detection member 76 is wound around the upper arm 18 of the living body 16. There is an advantage that the height position of the arm band 22 is automatically set to the height of the heart of the living body.

Further, according to the present embodiment, the arm band 22 wound in a cylindrical shape is supported by the support base 38 so as to be rotatable around a substantially horizontal axis orthogonal to the upper arm 18. Therefore, compared to a case where the arm band 22 wound in a cylindrical shape is supported by the support base 36 so that the axis of the arm band 22 is constant, the arm band 22 is attached to the upper arm 18 regardless of the height position of the support base 36. Arm band 2
The one-side contact of the upper and lower portions of the second part is alleviated, and the sense of incongruity is eliminated, and the decrease in measurement accuracy due to the one-side contact is eliminated.

Further, according to the present embodiment, the support table 38
It is supported by a column 40 erected on the base 36, and is supported by the column 40 so as to be relatively rotatable around a substantially vertical axis. In this manner, the left and right sides of the arm band 22 attached to the upper arm 18 are irrespective of the position of the support base 38 on the floor, as compared to the case where the support base 38 is fixed and supported on the column 40. The one-side contact of the side part is alleviated and the sense of incongruity is eliminated, and the decrease in measurement accuracy due to the one-side contact is eliminated.

Next, another embodiment of the present invention will be described. In the following description, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The embodiment shown in FIG. 5 is different from the embodiment shown in FIG. 4 in that a shoulder sensor 88 for detecting a shoulder 86 of the living body 16 is used in place of the photoelectric sensor 78 as a height position detecting device.
Is different from the embodiment. The shoulder sensor 88 captures an image of the vicinity of the shoulder 86 of the living body 16, extracts the contour of the shoulder 86 from an image including the shoulder 86 by image processing, and detects the position of the shoulder 86. And an image processing device. Like the photoelectric sensor 78, the shoulder sensor 88 has the imaging direction
6 is fixed to the support base 36 so as to be horizontal. This shoulder sensor 88 thereby allows the shoulder 86
Is detected, the central part of the axial center of the arm band 22 is fixed to the support base 36 at a height corresponding to the height of the heart.

According to the present embodiment, similarly to the above-described embodiment, the support table 38 movably provided in the vertical direction on the base 36 and supporting the upper arm 18 is moved by the driving device 42 in the vertical direction. The support base 38 supports the arm band 22 wound around the upper arm 18 of the living body 16 at a height related to the height of the heart of the living body 16. Since the driving device 42 is driven and controlled by the height position control device 80 based on the output signal of the shoulder sensor (height position detection device) 88, the arm band 22 wound around the upper arm 18 of the living body 16. Automatically adjusts the height position of the arm band 22 so that the height of the arm band 22 is equal to the height of the heart of the living body 16. Is preferably eliminated.

In the present embodiment, the shoulder sensor (height position detecting device) 88 is provided so as to move up and down together with the support base 36 and directly detects the shoulder 86 of the living body 16. Even if the detected member 76 is not mounted at a preset position related to the height of the heart, the height position of the arm band 22 wound around the upper arm 18 of the living body 16 automatically changes the height of the heart of the living body. It is said to be. In addition, there is an advantage that the detection member 76 is not affected by variations in the mounting position.

Although the embodiment of the present invention has been described with reference to the drawings, the present invention can be applied to other embodiments.

For example, the photoelectric sensor 78 of the above-described embodiment is used.
Alternatively, the shoulder sensor 88 is fixed to the support base 38, but may be fixed to a bracket or a column 40 protruding from the support base 38. For example, when the detection member 76 or the shoulder 86 is fixed to the support 40, the radiation direction or imaging direction of the projection beam of the photoelectric sensor 78 or the shoulder sensor 88 is set slightly upward toward the living body 16. When detected, the height position of the arm band 22 is made to exactly match the height of the heart. The detected member 76
May not necessarily be attached to the position of the heart, and may be attached to a site whose difference from the height position of the heart is set in advance. Even in this case, the photoelectric sensor 7
What is necessary is just to set the mounting position or detection angle of No. 8.

Further, the photoelectric sensor 78 or the shoulder sensor 88 of the above-described embodiment may be provided on another position fixing member such as a member standing upright from the base 36. As described above, the photoelectric sensor 78 or the shoulder sensor 88 is attached to the support base 3.
8, the absolute value of the height of the detected member 76 or the shoulder 86, for example, the height from the floor is measured from within the image so as to match the height from the floor. The height of the arm band 22 is adjusted.

Further, the arm band 22 of the above-described embodiment is constituted by the flexible belt 24 and the inflatable bag 26 provided on the inner peripheral surface thereof. A cylindrical inflation bag may be provided on the peripheral surface.

In the above-described embodiment, the automatic blood pressure measuring device 14 is formed separately from the arm band device 12, but may be integrally formed and provided on the support base 36.

In the above-described embodiment, the height of the arm band 22 is automatically adjusted in response to the operation of the automatic height adjustment start button 82. The height of the arm band 22 may be automatically adjusted. In this case, the height of the arm band 22 may be automatically adjusted by the height position control device 80 before the pressure of the inflatable bag 26 is increased, or may be simultaneously performed.

In the drive unit 42 of the above-described embodiment, another actuator such as a hydraulic cylinder or a pneumatic cylinder may be used instead of the electric motor 66. In addition, instead of the guide rod 52 and the guide member 52 for preventing the support column 40 from rotating relative to the tubular member 50, a keyway parallel to the axial direction is formed in a portion of the support column 40 where the male screw 58 is formed, A key fitted into the key groove may be fixed to the annular member 50.

The mechanism for raising and lowering the support table 38 in the above-described embodiment may be constituted by a link or a cable and an actuator for driving the link or the cable.

The photoelectric sensor 78 or the shoulder sensor 88 detects the detected member 76 or the shoulder 88 by using light, but detects by using ultrasonic waves, body temperature, magnetism, or the like. There is no problem.

The support base 38 of the above-described embodiment supports the arm band 22 indirectly via the housing 20, but directly supports the arm band 22 wound around the upper arm 18 from below. May be used. In this case, preferably, the support base 38 is provided so as to be rotatable around a rotation axis that is horizontal to the support 40.

Although not enumerated one by one, the present invention can be variously modified without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a use state of an automatic blood pressure measurement device that performs blood pressure measurement using a gantry according to an example of the present invention.

FIG. 2 is an enlarged view illustrating a configuration of a support base of the gantry of FIG. 1;

FIG. 3 is an enlarged view for explaining a configuration of a gantry driving device of FIG. 1;

FIG. 4 is a diagram illustrating a control device for automatically adjusting the height of a cuff in the gantry of FIG. 1;

FIG. 5 is a view illustrating a control device for automatically adjusting the height of a cuff in another embodiment of the present invention;
FIG. 5 is a diagram corresponding to FIG. 4.

[Description of sign]

 10: gantry 18: upper arm 22: arm band 76: detected member 78: photoelectric sensor (height position detection device) 80: height position control device 88: shoulder sensor (height position detection device)

Claims (3)

[Claims] 1. A blood pressure measurement rack for supporting a cuff wound around an upper arm of a living body in a cylindrical shape when measuring blood pressure, comprising: a base; and a vertically movable base on the base. A support that is provided to support the upper arm, a driving device that changes the vertical movement position of the support, and a height that detects a preset height position related to the height of the heart of the living body A position detection device, based on an output signal of the height position detection device, so that the support base supports the arm band wound around the upper arm of the living body at a height related to the height of the heart of the living body. And a height position control device for driving and controlling the driving device. A gantry for blood pressure measurement having an automatic height adjustment function. 2. The apparatus according to claim 1, wherein the height position detecting device is provided so as to move up and down together with the support table, and detects a detected member mounted at a preset position related to the height of the heart of the living body. 2. The blood pressure measurement platform according to claim 1, wherein the height is automatically adjusted. 3. The blood pressure measurement base having an automatic height adjustment function according to claim 1, wherein the height position detection device is provided so as to move up and down together with the support base and detects a shoulder of the living body. .