JP2004223102A - Hose of tourniquet for measuring blood pressure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tourniquet for measuring blood pressure which prevents the obstruction of ventilation caused by the bending of a hose and the interruption of the measurement of blood pressure or the stuffiness of the skin caused by the obstruction of ventilation. <P>SOLUTION: The hose 60 made of an elastic material connected to the tourniquet 10 is constituted so as to change in its wall thickness periodically in one round so that an increase and decrease in the wall thickness become contrary at a position symmetric with respect to the axial center of the hose. Accordingly, as compared with a hose the wall thickness of which is formed so that the increase and decrease in the wall thickness coincide with each other at the position symmetric with respect to the axial center of the hose, the hose becomes difficult to bend during handling for measuring blood pressure. Further, even if the hose 60 is bent, the flow cross section of pressure gas is ensured. Therefore, the interruption of the measurement of blood pressure or stuffiness of the skin caused by the bending of the hose is prevented suitably. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a hose connected to a compression band for measuring blood pressure, which is wound in a cylindrical shape to compress a part of a living body when measuring blood pressure.
[0002]
[Prior art]
2. Description of the Related Art There is known a compression band for measuring blood pressure which is provided with an inflatable inflation bag and is wound around a part of the living body in a cylindrical shape to compress a part of the living body when measuring blood pressure. Such a compression band is constituted by accommodating an inflatable bag connected to a hose in a band-like base made of, for example, a two-folded nylon resin cloth, or a two-folded vinyl resin sheet. A hermetic inflatable bag is integrally provided on a part of the inside of a belt-shaped base member by high frequency welding. For example, the compression band described in Patent Literature 1 is the compression band. The inflation bag of the compression band for blood pressure measurement is inflated by, for example, being wound around the upper arm of a living body and being supplied with a pressurized gas through a hose connected to the hose. It is formed in a tubular shape from an elastically deformable elastic material such as rubber or natural rubber, and is connected in a posture along an extension in the width direction, for example, at a lower edge position of the compression band of the inflatable bag, that is, at a peripheral edge position.
[0003]
[Patent Document 1] Japanese Patent Application Laid-Open No. 07-024303
[Problems to be solved by the invention]
By the way, when measuring the blood pressure of a patient in an outpatient ward or hospital ward, for example, a blood pressure measurement compression band connected to a blood pressure measurement device via a hose is wound around the patient, and the expansion bag of the compression band is inflated. The blood pressure is measured by this, but the hose is likely to bend during the measurement work because a soft material having a relatively low rubber hardness is selected in consideration of contact with the skin of a living body. was there. For example, as shown in FIG. 7, a hose 94 extending in the width direction of the compression band 80 wound around the upper arm 96 may be bent in contact with the inner surface of the forearm 98 inside the elbow joint. In this case, since the gas flow in the hose 94 is obstructed, a sudden increase in pressure occurs when a pressure gas is supplied from the blood pressure measurement device, an error is determined, and the blood pressure measurement is automatically stopped. There was a possibility. Also, even during the non-measurement period in which a part of the living body is released from the compression by the compression band, the volume of the inflatable bag does not become sufficiently small, so that the inner peripheral surface of the compression band and the skin of the living body are relatively in close contact with each other, When blood pressure measurement is performed over a long period of time while wearing the compression band, unpleasant irregularities such as swelling of the skin and generation of offensive odor may occur. In particular, such inconvenience is remarkable in bedridden patients who cannot eliminate the cause of the disorder themselves.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a compression for blood pressure measurement capable of preventing stoppage of blood pressure measurement and unevenness of skin caused by bending of a hose. To provide a belt hose.
[0006]
[Means for Solving the Problems]
The gist of the present invention for achieving the above object is to have an inflatable inflatable bag, and to measure a blood pressure wound around a part of a living body to compress a part of the living body at the time of measuring blood pressure. A hose for a compression band for measuring blood pressure connected to the compression band, comprising a tube made of an elastic material, having a wall thickness that changes periodically in one circumferential direction and that increases and decreases in a symmetrical position with respect to the axis. Is to be.
[0007]
【The invention's effect】
According to this configuration, the hose is formed in a tubular shape from an elastic material, and the thickness thereof is configured to periodically change in one circumferential direction and to increase and decrease in a symmetrical position with respect to the axis. Therefore, the hose is less likely to be bent during handling for blood pressure measurement as compared to a hose having a wall thickness so that the increase and decrease coincide with each other at a symmetric position with respect to the axis. Further, even if the hose is bent, a flow cross section of the pressurized gas is secured. For this reason, stoppage of blood pressure measurement and unevenness of the skin due to the bending of the hose are suitably prevented.
[0008]
Other aspects of the invention
Here, preferably, the thickness of the hose is, in a cross section of the hose, a hole shape including an odd-numbered linear portion and an arc portion connecting the linear portion, and a circular outer peripheral shape concentric with the hole. Is formed between With this configuration, the thickness of the hose changes periodically in one circumferential direction, and increases and decreases at positions symmetrical with respect to the axis, so that the hose breaks during handling for blood pressure measurement. It becomes difficult to bend, and even if the hose is bent, a flow cross section of the pressurized gas is secured.
[0009]
Preferably, the hole shape of the hose is a substantially triangular shape including three straight portions and three arc portions connecting the straight portions. With this configuration, the thickness of the hose changes periodically in one circumferential direction, and increases and decreases at positions symmetrical with respect to the axis, so that the hose breaks during handling for blood pressure measurement. It becomes difficult to bend, and even if the hose is bent, a flow cross section of the pressurized gas is secured.
[0010]
Preferably, the connector is connected to the hose by fitting a nipple of the connector into an end of the hose opposite to the inflation bag. In this case, if the hole shape of the hose is a rectangular shape such as a substantially triangular shape as described above, there is an advantage that a conventionally used connector can be directly connected.
[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 configuration of a blood pressure measurement device 12 provided with a compression band 10 via a hose 60 according to one embodiment of the present invention. In the figure, a pressure sensor 16 and an exhaust control valve 18 are connected to an inflation bag 14 of the compression band 10, and an air pump 22 is connected via a switching valve 20. The pressure sensor 16 detects the pressure in the inflatable bladder 14 and outputs a pressure signal SP representing the pressure. The exhaust control valve 18 functions as compression pressure control means, and controls the flow cross-sectional area to slowly or rapidly exhaust the air in the expansion bag 14. The switching valve 20 is an electromagnetic switching valve that is switched between a compression-side position and a suction-side position in order to function as a bag-part contracting unit. In the compression-side position, the inflation bag 14 of the compression band 10 is And the suction port of the air pump 22 is communicated with the atmosphere. At the suction side position, the expansion bag 14 of the compression band 10 is communicated with the suction port of the air pump 22 and the discharge port of the air pump 22 is connected to the atmosphere. To communicate with
[0013]
The low-pass filter 24 discriminates and outputs the cuff pressure signal SK indicating the compression pressure of the compression band 10 from the pressure signal SP output from the pressure sensor 16, and supplies the cuff pressure signal SK to the CPU 30 via the A / D converter 26. The band-pass filter 28 discriminates and outputs a pulse wave signal SM, which is a pressure vibration generated in synchronization with the heartbeat, from the pressure signal SP output from the pressure sensor 16, and outputs the signal through the A / D converter 26. To the CPU 30.
[0014]
The CPU 30, together with the ROM 32, the RAM 34, the interface 36, and the like, constitutes a microcomputer, that is, an arithmetic control circuit 37 functioning as blood pressure value determining means. The CPU 30 utilizes a storage function of the RAM 34 and stores programs stored in the ROM 32 in advance. The input signal is processed in accordance with the following, the blood pressure value is displayed on the display 38, and the exhaust control valve 18, the switching valve 20, and the air pump 22 are controlled. The start signal MS from the start push button switch 40, the stop signal MT from the stop push button switch 42, and the start signal CS from the start signal generator 44 are supplied to the CPU 30. The activation signal generator 44 is selectively activated by a manual / auto switch 46. The activation signal generator 44 includes, for example, a well-known flip-flop circuit, and is configured to repeatedly generate the activation signal CS according to a preset period of several minutes to several tens of minutes by a setting device (not shown). It is configured.
[0015]
When the activation signal CS is supplied, the CPU 30 rapidly raises the compression pressure of the compression band 10 to a pressure increase target value set in advance higher than the systolic blood pressure value, and then obtains a pulse obtained in a process of gradually lowering the pressure. A blood pressure value is determined by an oscillometric method based on a change in wave amplitude. Further, when supplying the pressurized gas to the compression band 10 at the start of the blood pressure measurement, the CPU 30 determines that the pressure increase speed detected as the pressure of the compression band 10 is larger than a predetermined error determination value, If the speed is higher than the pressure increasing speed, it is determined that the pressure is abnormal and the blood pressure measurement is stopped.
[0016]
FIG. 2 is a diagram showing an outer peripheral surface in a state where the compression band 10 is developed in a plane, and FIG. 3 is a diagram showing an inner peripheral surface in a state where the compression band 10 is developed in a plane. As shown in FIGS. 2 and 3, the compression band 10 of the present embodiment is made of a woven fabric woven from synthetic fibers, a synthetic resin sheet such as a soft vinyl chloride sheet, a nylon sheet, or the like. An inner peripheral side sheet member 52 of a similar shape is joined to the outer peripheral side sheet member 50 at its outer peripheral edge by a method such as sewing, an adhesive, or high-frequency welding to form a longitudinal and bag-like shape. I have. The outer peripheral side sheet member 50 and the inner peripheral side sheet member 52 constitute a bag-shaped band-shaped base material.
[0017]
Inside one end of the compression band 10 in the longitudinal direction, there is provided a rectangular inflatable bladder 14 having a length approximately half of that of the compression band 10. In addition, a large number of loops implanted on the surface are provided at the end of the outer peripheral surface of the compression band 10 on the side of the inflatable bag 14 and the end of the inner peripheral surface of the compression band 10 on the side opposite to the inflatable bag 14. A pair of fasteners 54 and 56, each of which is detachably adhered by engaging a plurality of hooks made of elastically deformable synthetic resin implanted on the surface so as to engage with the fiber, are fixedly provided. ing. The pair of fasteners 54 and 56 are adhered to each other, so that the compression band 10 is arranged such that the end opposite to the inflatable bag 14 is overlapped with the outer end of the inflatable bag 14 in the upper arm of the living body. Is wound into a cylindrical shape.
[0018]
The inflatable bag 14 is airtightly formed of a relatively soft flexible or elastic member such as a vinyl chloride sheet or a natural or synthetic rubber sheet, and pressurized gas from the pump 22 is supplied to the inflatable bag 14. A flexible hose 60 to be supplied is connected to the widthwise side edge of the inflatable bladder 14. The hose 60 is an elastic tube made of an elastic material such as natural rubber or synthetic rubber, and a material having a relatively low rubber hardness is selected in consideration of contact with the skin of a living body. The hose 60 is connected to the blood pressure measurement device 12 via a connector 62. Usually, the length A of the hose 60 between the compression band 10 and the connector 62 is, for example, about 30 to 40 cm, and the length B of the hose 60 between the connector 62 and the blood pressure measurement device 12 is, for example, It is about 3 m.
[0019]
As shown in FIG. 4, a tubular nipple 64 integrally projecting from the connector 62 is press-fitted into one end of the hose 60 on the side opposite to the inflation bag 14, so that the hose 60 and the connector are connected. 62 are mutually connected in an airtight state. The connector 62 having the nipple 64 is made of metal or a relatively hard synthetic resin. Since the hole shape of the hose 60 is relatively close to the outer peripheral surface of the nipple 64 as described later, the connector 62 can be easily cut by cutting without any processing. Connected.
[0020]
FIG. 5 shows a cross-sectional shape of the hose 60. The hose 60 has the same number as three or more odd (three in this embodiment) straight portions 60a and straight portions 60a that smoothly connect a pair of mutually adjacent ends of the straight portions 60a. In this embodiment, a substantially triangular hole 60h and a circular outer peripheral surface 60s having a diameter larger than the hole 60h and concentric with the hole 60h. It is formed so as to have. As a result, the thickness formed between the hole 60h of the hose 60 and the outer peripheral surface 60s is a thickness that periodically changes in one circumferential direction and increases and decreases at a symmetric position with respect to the axis. For example, in FIG. 5, when considering the thickness of the straight line L passing through the axis C in one direction around the axis C, for example, the rotation in the direction of the arrow, the thickness is periodically smooth. And the wall thickness on the straight line L opposite to the axis C is decreased when one increases, and decreased when the other increases.
[0021]
As described above, the thickness of the hose 60 made of an elastic material connected to the compression band 10 of the present embodiment changes periodically in one circumferential direction, and increases and decreases in a symmetrical position with respect to the axial center. Therefore, the hose is less likely to be bent during handling for blood pressure measurement as compared with a hose having a wall thickness so that the increase and decrease coincide with each other at a symmetric position with respect to the axis. Further, even if the hose 60 is bent, a flow cross section of the pressurized gas is secured. For this reason, stoppage of blood pressure measurement and unevenness of the skin due to the bending of the hose are suitably prevented.
[0022]
Further, according to the present embodiment, the thickness of the hose 60 is, in the cross section of the hose, a shape formed by an odd number of straight portions 60a and an arc portion 60b connecting the straight portions 60a, for example, three straight portions 60a. Since it is formed between a substantially triangular hole 60h composed of three arc portions 60b connecting the linear portions 60a, and a circular outer peripheral surface 60s concentric with the hole 60h, Since the thickness of the hose 60 is configured to change periodically in one circumferential direction and to increase and decrease in a symmetrical position with respect to the axis, the hose is bent during handling for blood pressure measurement. It becomes difficult, and even if the hose is bent, a flow cross section of the pressurized gas is secured.
[0023]
According to the present embodiment, the hose 60 has the connector 62 connected to the end of the hose 60 opposite to the inflation bag 14 by fitting the nipple 64 of the connector 62 into the end. Therefore, there is an advantage that the conventionally used connector 62 can be directly connected without any processing for cutting the end of the hose 60.
[0024]
Next, another embodiment of the present invention will be described. In the following description, portions common to the above-described embodiment will be denoted by the same reference numerals and description thereof will be omitted.
[0025]
FIG. 6 shows a cross-sectional shape of a hose 68 according to another embodiment of the present invention. The hose 68 has the same number as three or more odd-numbered (five in this embodiment) straight portions 68a and a straight portion 68a that smoothly connects a pair of mutually adjacent ends of the straight portions 68a. It is formed so as to have a substantially pentagonal hole 68h having a shape composed of the arc portion 68b, and a circular outer peripheral surface 60s having a diameter larger than the hole 68h and concentric with the hole 60h. As a result, the thickness formed between the hole 68h of the hose 68 and the outer peripheral surface 68s is a thickness that periodically changes in one circumferential direction and that increases and decreases in a symmetrical position with respect to the axis. For example, in FIG. 6, when considering the thickness of the straight line L passing through the axis C in one direction around the axis C, for example, the rotation in the direction of the arrow, the thickness is periodically smooth. And the wall thickness on the straight line L opposite to the axis C is decreased when one increases, and decreased when the other increases.
[0026]
As mentioned above, although one Example of this invention was described based on drawing, this invention is applied also to another aspect.
[0027]
For example, in the above-described embodiment, the straight portions 60a, 68a of the hoses 60, 68 may be slightly curved on the inner peripheral side or the outer peripheral side. Further, the arc portions 60b, 68b of the hoses 60, 68 do not have to have the same curvature, and may have a curve (arc) whose curvature changes.
[0028]
In the above-described embodiment, the triangular or pentagonal shape of the holes 60h, 68h of the hoses 60, 68 may not be formed over the entire length thereof, and may be a part of the hoses 60, 68 in the longitudinal direction, for example, bent. Even if it is formed only in a portion where the occurrence of blemishes easily occurs, a tentative effect can be obtained.
[0029]
Further, in the above-described embodiment, the hose 60 is connected to the side edge of the inflatable bladder. However, the hose 60 may be of a type connected to an intermediate portion in the width direction. This is because the compression band 10 of the type connected to the intermediate portion in the width direction is effective when the hose 60 is bent.
[0030]
Further, the compression band 10 of the above-described embodiment is composed of the bag-shaped band-shaped base material and the inflatable bag 14 housed therein, but the bag-shaped band-shaped base material is made of a sheet material having no air permeability. It may be of a type in which an inflatable bag is formed by itself on a part of the band-shaped base material.
[0031]
In addition, the compression band 10 of the above-described embodiment has a longitudinal shape that extends linearly. However, since the compression band 10 is attached to an upper arm, a thigh, an ankle, or the like, if necessary, the longitudinal shape is curved as a whole. It does not matter even if it is said.
[0032]
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 block diagram illustrating a configuration of a blood pressure measurement device to which a compression band is connected via a hose according to an example of the present invention.
FIG. 2 is a diagram showing an outer peripheral surface in a state where the compression band of FIG. 1 is developed in a plane.
FIG. 3 is a diagram showing an inner peripheral surface in a state where the compression band of FIG. 1 is developed in a plane.
FIG. 4 is a partially cutaway view showing a state in which a nipple of a connector is press-fitted into an end of a hose connected to the compression band shown in FIGS. 2 and 3.
FIG. 5 is an enlarged view showing a sectional shape of the hose of FIG. 1;
FIG. 6 is an enlarged view showing a sectional shape of a hose according to another embodiment of the present invention, and is a view corresponding to FIG.
FIG. 7 is a diagram illustrating a state of mounting a compression band to which a conventional hose is connected.
[Explanation of symbols]
10: compression band 14: inflatable bag 60, 68: hose 60a, 68a: linear portion 60b, 68b: arc portion 60h, 68h: hole 60s, 68s: outer peripheral surface 62: connector 64: nipple

Claims (4)

A blood pressure measurement compression band hose connected to a blood pressure measurement compression band that has an inflatable inflation bag and is wound around a part of the living body to compress a part of the living body during blood pressure measurement, ,
A hose for a compression band for blood pressure measurement, which is formed in a tubular shape from an elastic material, and has a wall thickness which changes periodically in one circumferential direction and whose thickness increases and decreases at a symmetric position with respect to an axis. In the cross section of the hose, the thickness of the hose is formed between a hole shape formed of an odd number of straight portions and an arc portion connecting the straight portions, and a circular outer peripheral shape concentric with the hole. The hose of the compression band for measuring blood pressure according to claim 1, wherein The hose of the compression band for blood pressure measurement according to claim 1 or 2, wherein a hole shape of the hose is a substantially triangular shape including three straight portions and three arc portions connecting the straight portions. The blood pressure measurement compression according to any one of claims 1 to 3, wherein the hose has a connector connected thereto by fitting a nipple of the connector into an end of the hose opposite to the inflation bag. Obi hose.

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