JP4016512B2 - Blood pressure measurement stand with automatic height adjustment function - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a blood pressure measurement mount for supporting the upper arm of a living body around which an arm band is wound for blood pressure measurement, and relates to a technique for automatically adjusting the support height of the upper arm in order to increase blood pressure measurement accuracy. It is.
[0002]
[Prior art]
As a method for measuring blood pressure in the living body, the maximum blood pressure based on 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 Kotorkoff sound method (JIS T 1115) to determine the minimum blood pressure, or the maximum blood pressure value based on the amplitude change of the pulsation of the compression pressure generated in synchronization with the heartbeat in the process of continuously changing the compression pressure of the armband Further, an oscillometric method (JIS T 1115) for determining a minimum blood pressure value is known. In these blood pressure measurement methods, the height position of the compression part of the armband is approximately the same as the height position of the heart of the living body so that the measured blood pressure value can be handled as the aortic internal pressure of the living body. It is executed as a premise.
[0003]
[Problems to be solved by the invention]
However, the height position of the wearing part of the armband wound around the upper arm of the living body often does not always coincide with the height position of the heart. For example, when the armband is attached to the upper arm of a living body prior to measurement, the armband has a predetermined angle with respect to the lower part of the upper arm, that is, the upper arm unless it is intentionally performed. Since it is attached to the part adjacent to the forearm, the height position of the arm band attachment part tends to be lower than the height position of the heart. The blood pressure value is shifted to a higher side compared to the blood pressure value in the aorta, and the blood pressure measurement accuracy is lowered.
[0004]
The present invention has been made against the background of the above circumstances, and the object of the present invention is to provide a height automatic that does not cause a decrease in blood pressure measurement accuracy related to a shift in the height position of the armband wearing part relative to the heart. An object of the present invention is to provide a blood pressure measurement stand having an adjustment function.
[0005]
[Means for Solving the Problems]
The gist of the present invention for achieving the above object is a blood pressure measurement stand for supporting an arm band wound in a cylindrical shape on the upper arm of a living body when blood pressure is measured. A base, (b) a support base provided on the base so as to be movable in the vertical direction and supporting the upper arm, (c) a drive device for changing the vertical movement position of the support base, and (d ) A height position detecting device for detecting a preset height position related to the height of the heart of the living body; and (e) the living body on the support base 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 drive device based on an output signal of the height position detection device so as to support an arm band wound around the upper arm.
[0006]
【The invention's effect】
In this way, the support base, which is provided on the base so as to be movable in the vertical direction and supports the upper arm, can be moved by the drive device to change the vertical position thereof. Based on the output signal of the height position detection device, the height position control device causes the support base to support the armband wound around the upper arm of the living body at a height related to the height of the heart. The drive device is driven and controlled. For this reason, the armband height position is automatically adjusted so that the armband wound around the upper arm of the living body becomes the height of the heart of the living body. The decrease in blood pressure measurement accuracy related to the deviation is preferably eliminated.
[0007]
Other aspects of the invention
Here, preferably, the height position detection device detects a detected member that is provided so as to move up and down together with the support base and is mounted at a preset position related to the height of the heart of the living body. To do. In this way, the drive device drives the support base until the member to be detected is detected by the height position detection device, so that the height position of the armband wound around the upper arm of the living body is automatically set. There is an advantage that is with the height of the heart.
[0008]
Preferably, the height position detection device is provided so as to move up and down together with the support base and detects the shoulder of the living body. In this way, even if the member to be detected is not mounted at a preset position related to the height of the heart, the height position of the arm band wound around the upper arm of the living body is automatically set to the heart of the living body. It is said that the height. Further, there is an advantage that the detection member is not affected by variations in the mounting position.
[0009]
Preferably, the arm band wound in the cylindrical shape is supported by the support base so as to be rotatable about a substantially horizontal axis perpendicular to the upper arm. In this way, the armband wound in a cylindrical shape can be attached to the upper arm regardless of the height position of the support base, as compared to the case where the arm belt is supported by the support base so that the axis is constant. As a result, the contact between the upper and lower side portions of the armband is alleviated and the uncomfortable feeling is eliminated, and the decrease in measurement accuracy due to the contact is eliminated.
[0010]
Preferably, the support base is supported by a support column provided upright on the base, and is supported by the support column so as to be rotatable about a substantially vertical axis. In this way, compared to the case where the support base is supported in a state of being fixed on the support column, the left and right side portions of the arm band attached to the upper arm are not affected by the position of the support base on the floor. Is alleviated to eliminate the sense of incongruity, and the decrease in measurement accuracy due to the contact is eliminated.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 shows a use state of an arm band 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, an arm band device 12 is one into which an upper arm 18 of a living body 16 in a posture sitting on a chair 15 is inserted during blood pressure measurement. For example, as shown in FIG. And a cylindrical arm band 22 provided on the inner peripheral side thereof. The arm band 22 includes a flexible belt 24 wound in a cylindrical shape and capable of being reduced in diameter by tightening, and an inflatable bag 26 provided on all or part of the inner peripheral surface of the flexible belt 24. I have. The expansion bag 26 is connected to the automatic blood pressure measurement device 14 via a hose 28.
[0013]
The automatic blood pressure measurement device 14 includes a so-called microcomputer including a CPU, a ROM, a RAM, an interface, and the like (not shown). The CPU processes an input signal according to a program stored in advance in the ROM while using a temporary storage function of the RAM. The blood pressure value is determined and displayed on the display 30. That is, when the blood pressure measurement activation operation is performed, air is pumped from the air pump to the inflatable 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. , The air pump is stopped, and at the same time, the air in the expansion bag 26 is gradually discharged from the exhaust control valve to gradually reduce the compression pressure at a predetermined pressure reduction speed, for example, about 5 mmHg / sec. During this slow pressure reduction process, a pulse wave, which is a pulsation component included in the compression pressure of the expansion bag 26, is extracted by a bandpass filter and the amplitude of the pulse wave is stored. For example, the amplitude of the pulse wave changes rapidly. The compression pressure is determined as a blood pressure value and displayed.
[0014]
The gantry 10 is provided with a caster 32 that is selectively rotated and braked, and is placed on a floor 34 and is movable in the vertical direction with respect to the pedestal 36. A support base 38 and a drive device 42 for driving the support base 38, that is, a support column 40 that accurately supports the support base 38, are provided in order to change the vertical movement position of the support base 38. As shown in FIG. 2, the support base 38 is configured so that the armband device 12 can relatively rotate around a substantially horizontal axis perpendicular to the upper arm 18 in the axial center of the housing 20. In addition, the armband device 12 is supported via a pin 44. Accordingly, 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 capable of relative rotation about a substantially horizontal axis. The support base 38 is supported by the support column 40 so as to be rotatable around the pin 46 so as to be rotatable about a substantially vertical axis.
[0015]
Further, in the drive device 42, as shown in detail in FIG. 3, the support column 40 is slidably fitted into a tubular member 50 fixed to the base 36 so as to protrude in the vertical direction. A guide rod 52 fixed to the support column 40 in a direction parallel to the axial center direction is fitted into a guide hole 56 provided in a guide member 54 fixed to the tubular member 50, whereby the support rod 40 and The relative rotation of the tubular member 50 in which it is fitted is prevented. Thereby, the support | pillar 40 is provided on the base 36 so that a vertical movement is possible in the state which cannot rotate the periphery of the axial center. A male screw 58 is formed on the outer peripheral surface of the column 40, and an outer peripheral tooth 60 is formed on the male screw 58, and 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 together. A pinion 70 fixed to the output shaft 68 of the electric motor 66 provided in the tubular member 50 is engaged with the outer peripheral teeth 60 of the nut 64. As a result, when the nut 64 is rotated relative to the support column 40 by the electric motor 66 and the screwing position of the nut 64 is changed, the support base 38 and the armband 22 supported by the support column 40 are moved up and down. The direction position, that is, the height position is adjusted. Reference numeral 72 denotes a cover of the driving device 42.
[0016]
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, for example, a reflective tape, a reflection A member to be detected 76 composed of a label, a reflective mark, or the like is attached. Further, as shown in FIG. 2, a photoelectric sensor 78 for optically detecting the detected member 76 is provided in the vicinity of the pin 44 of the support base 38, that is, in the axial direction of the cylindrical housing 20 or the armband 22. It is provided at a height position substantially the same as the height position of the central portion. The detected member 76 has, for example, a large number of glass beads fixed in the surface layer thereof, and has a property of emitting reflected light toward the light source of the projection light. The photoelectric sensor 78 emits a flat projection beam that expands at a relatively small angle in the vertical direction and a relatively large angle in the horizontal direction in the horizontal direction, and reflects the reflected light from the detected member 76. It detects by receiving light. In general, the photoelectric sensor 78 uses infrared modulated light as a projection beam in order to make it less susceptible to external light.
[0017]
The height position control device 80 shown in FIG. 4 is configured by, for example, a microcomputer in the automatic blood pressure measurement device 14, and when the automatic height adjustment activation button 82 is operated prior to activation of blood pressure measurement. The electric motor 66 is operated until the photoelectric sensor 78 detects the detected member 76 attached to the living body, and when the detected member 76 is detected by the photoelectric sensor 78, the operation of the electric motor 66 is automatically stopped. Thereby, the height position of the central portion of the armband 22 in the axial center direction is automatically set to the same height as the detected member 76. If the automatic height adjustment stop button 84 is operated when it is desired to stop the automatic height adjustment for some reason, the height position control device 80 preferentially stops the operation of the electric motor 66.
[0018]
As described above, according to this embodiment, the support base 38 that is provided on the base 36 so as to be movable in the vertical direction and supports the upper arm 18 is moved by the drive device 42 to change the vertical position thereof. The height position control device is configured to support the arm band 22 wound around the upper arm 18 of the living body 16 on the support base 38 at a height related to the height of the heart of the living body 16. 80, the driving device 42 is driven and controlled based on the output signal of the photoelectric sensor (height position detecting device) 78. For this reason, since the arm band 22 wound around the upper arm 18 of the living body 16 is automatically adjusted to the height of the heart of the living body 16, the height position of the arm band 22 is automatically adjusted. The decrease in blood pressure measurement accuracy related to the shift of the height position with respect to the heart is preferably eliminated.
[0019]
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 base 38 and is mounted at a preset position related to the height of the heart of the living body 16. Since the detected member 76 is detected, the drive device 42 drives the support base 36 until the detected member 76 is detected by the photoelectric sensor 78, whereby the arm wound around the upper arm 18 of the living body 16. There is an advantage that the height position of the band 22 is automatically set to the height of the heart of the living body.
[0020]
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 about a substantially horizontal axis perpendicular to the upper arm 18. Compared to the case where the support belt 36 is supported so that the axial center of the arm belt 22 wound in the shape is constant, the arm belt attached to the upper arm 18 regardless of the height position of the support base 36. The contact between the upper and lower side portions of 22 is alleviated and the uncomfortable feeling is eliminated, and the decrease in measurement accuracy due to the contact is eliminated.
[0021]
Further, according to the present embodiment, the support base 38 is supported by the support column 40 erected on the base 36 and is supported by the support column 40 so as to be relatively rotatable about a substantially vertical axis. Is. In this way, as compared with the case where the support base 38 is supported in a state of being fixed on the support column 40, the left and right sides of the arm belt 22 attached to the upper arm 18 regardless of the position of the support base 38 on the floor. The side contact is alleviated and the uncomfortable feeling is eliminated, and the decrease in measurement accuracy caused by the contact is eliminated.
[0022]
Next, another embodiment of the present invention will be described. In the following description, the same reference numerals are given to portions common to the above-described embodiment, and description thereof is omitted.
[0023]
The embodiment shown in FIG. 5 is different from the embodiment shown in FIG. 4 in that a shoulder sensor 88 for detecting the shoulder 86 of the living body 16 is used in place of the photoelectric sensor 78 as the height position detection device. This shoulder sensor 88 images the vicinity of the shoulder 86 of the living body 16 and extracts the contour line of the shoulder 86 from the image including the shoulder 86 by image processing, and detects the position of the shoulder 86. It comprises an imaging camera and an image processing device. Similarly to the photoelectric sensor 78, the shoulder sensor 88 is also fixed to the support base 36 so that the imaging direction is horizontal toward the living body 16. When the shoulder 86 of the living body 16 is detected by this shoulder sensor 88, the shoulder sensor 88 is fixed to the support base 36 at a height position where the central portion of the axis of the armband 22 becomes the height of the heart.
[0024]
According to the present embodiment, as in the above-described embodiment, the support base 38 that is provided on the base 36 so as to be movable in the vertical direction and supports the upper arm 18 is changed in its vertical position by the drive device 42. The arm band 22 wound around the upper arm 18 of the living body 16 is supported on the support base 38 at a height related to the height of the heart of the living body 16. Since the drive device 42 is driven and controlled by the 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 becomes the living body 16. Since the height position of the arm band 22 is automatically adjusted so as to be the height of the heart, it is preferable to reduce the blood pressure measurement accuracy related to the shift of the height position of the arm band 22 with respect to the heart. It will be resolved.
[0025]
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 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 is automatically set as the height of the heart of the living body. . Further, there is an advantage that the detection member 76 is not affected by variations in the mounting position.
[0026]
As mentioned above, although one Example of this invention was described based on drawing, this invention is applied also in another aspect.
[0027]
For example, the photoelectric sensor 78 or the shoulder sensor 88 of the above-described embodiment is fixed to the support base 38, but may be fixed to a bracket or a support column 40 protruding from the support base 38. For example, when fixed to the support column 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, whereby the detected member 76 or the shoulder 86 is moved. When detected, the height position of the armband 22 is exactly matched to the height of the heart. Further, the detected member 76 does not necessarily have to be attached to the position of the heart, and may be attached to a site where a difference from the height position of the heart is set in advance. Even in this case, the mounting position or detection angle of the photoelectric sensor 78 may be set in consideration of the difference.
[0028]
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 from the base 36. As described above, when the photoelectric sensor 78 or the shoulder sensor 88 is provided on a fixed member that does not move up and down together with the support base 38, the absolute value of the height of the detected member 76 or the shoulder 86, for example, the height from the floor is determined. The height of the armband 22 is adjusted to be measured from within the image and coincide with the height from the floor.
[0029]
Further, the arm band 22 of the above-described embodiment is composed of the flexible belt 24 and the expansion bag 26 provided on the inner peripheral surface thereof, but on the inner peripheral surface of the cylindrical housing 20. A cylindrical expansion bag may be provided.
[0030]
In the above-described embodiment, the automatic blood pressure measurement device 14 is configured separately from the armband device 12, but may be configured integrally and provided on the support base 36.
[0031]
In the above-described embodiment, the height of the armband 22 is automatically adjusted in response to the operation of the automatic height adjustment activation button 82. However, the armband in response to the blood pressure measurement activation button. The height of 22 may be automatically adjusted. In this case, the height of the armband 22 may be automatically adjusted by the height position control device 80 before the compression pressure of the expansion bag 26 is increased, or may be performed simultaneously.
[0032]
In the driving device 42 of the above-described embodiment, other actuators such as a hydraulic cylinder and a pneumatic cylinder may be used instead of the electric motor 66. Further, instead of the guide rod 52 and the guide member 52 for preventing the relative rotation of the support column 40 with respect to the tubular member 50, a key groove parallel to the axial direction is formed in the portion of the support column 40 where the male screw 58 is formed, A key that is fitted into the key groove may be fixed to the annular member 50.
[0033]
Further, the mechanism for raising and lowering the support base 38 of the above-described embodiment may be constituted by a link or cable and an actuator for driving it.
[0034]
Further, the photoelectric sensor 78 or the shoulder sensor 88 described above detects the member to be detected 76 or the shoulder 88 using light, but may detect it using ultrasonic waves, body temperature, magnetism, or the like. There is no problem.
[0035]
The support base 38 of the above-described embodiment indirectly supports the arm band 22 via the housing 20, but directly supports the arm band 22 wound around the upper arm 18 from the lower side. There may be. In this case, the support base 38 is preferably provided so as to be rotatable around a rotation axis that is horizontal with respect to the support column 40.
[0036]
In addition, although not listed one by one, the present invention can be variously modified without departing from the spirit of the present invention.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a usage 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 in FIG. 1;
3 is an enlarged view illustrating the configuration of the gantry driving device in FIG. 1; FIG.
4 is a diagram for explaining a control device for automatically adjusting the height of an arm band in the gantry of FIG. 1; FIG.
FIG. 5 is a diagram for explaining a control device for automatically adjusting the height of an arm band in another embodiment of the present invention, and corresponding to FIG. 4;
[Explanation of sign]
10: Stand 18: Upper arm 22: Arm band 76: Detected member 78: Photoelectric sensor (height position detecting device)
80: Height position control device 88: Shoulder sensor (height position detection device)

Claims (5)

A blood pressure measurement platform for rotatably supporting an arm band wound in a cylindrical shape on the upper arm of a living body when measuring blood pressure,
The base,
A support base provided on the base so as to be movable in the vertical direction and supporting the upper arm;
A drive device for changing the vertical movement position of the support;
A height position detecting device for detecting a preset height position related to the height of the heart of the living body;
Based on the output signal of the height position detecting device, the driving device is configured to cause the support base to support 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. A height position control device for driving control,
A blood pressure measurement stand having an automatic height adjustment function characterized by including. The automatic height adjustment function according to claim 1, wherein the arm band wound in a cylindrical shape is supported by the support base so as to be rotatable about a substantially horizontal axis perpendicular to the upper arm. A blood pressure measurement stand. 2. The automatic height adjustment according to claim 1, wherein the support base is supported by a support column erected on the base and is rotatably supported by the support column about a substantially vertical axis. A blood pressure measurement stand with a function. The height position detecting device is for detecting a predetermined detection member mounted at a position associated disposed to vertically together with the supporting base to the height of the heart of the living body, claim A blood pressure measurement stand provided with the automatic height adjustment function according to any one of 1 to 3 . The blood pressure measurement with the automatic height adjustment function according to any one of claims 1 to 3, wherein the height position detection device is provided so as to move up and down together with the support base and detects the shoulder of the living body. Mounting stand.

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