JPS62275451A - Cuff for measuring blood pressure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a blood pressure measuring cuff for measuring blood pressure by indirect means.

``Prior art'' Conventionally, in the process of once compressing the arterial blood vessel of a small animal, particularly a rat, with a cuff and then depressurizing it at a constant rate, the systolic blood pressure and mean blood pressure were measured based on the amplitude change of the volume pulse wave photoelectrically detected at the relevant site. Indirect blood pressure measurement methods are known that indirectly determine blood pressure. In this device, as the cuff pressure that has been applied in advance is reduced, the volume pulse wave amplitude develops, and the amplitude eventually reaches a maximum and then decreases. The point at which the pulse wave amplitude appears and the point at which the amplitude reaches its maximum are determined to be the systolic blood pressure value and the mean blood pressure value, respectively.

In this indirect blood pressure measurement method for small animals, for example, a transparent tape is wrapped around the blood pressure measurement site on the rat's tail. During the wrapping process, a light-emitting element and a light-receiving element are placed between the tapes, and the tail is placed between the two tapes. On the other hand, an elastic and flexible pressure member having a foot insertion hole is airtightly provided in the hollow rigid body, and an air introduction hole is provided in the rigid body, and the blood pressure of the rat to be measured is inserted into the foot insertion hole. Blood pressure is measured by inserting a tape-wrapped tail wavefront pressure measurement site, introducing fluid between the rigid body and the pressing member so that it can be pressurized and depressurized, and measuring blood pressure as described above.

``Problems to be solved by the invention'' However, with such conventional blood pressure measuring means,
Not only is it time-consuming to wrap the tape around the tail each time, but the cone is used to handle it, and if the rat gets upset and moves its tail, the tape will rub against the tail, causing hair to fall off or the skin to break off. There has been a problem in that long-term blood pressure measurement may not be possible due to the wear and tear of the blood pressure. In addition, there was a risk that the blood pressure of the rat would change due to the rat being exposed, making it impossible to accurately measure the desired blood pressure. In addition, when wrapping the tape around the tail, pressure is applied to the tail, making it impossible to accurately measure the 1I11 pressure.

An object of the present invention is to provide a blood pressure measuring cuff that solves the above-mentioned problems of conventional cuffs.

"Means for Solving the Problems" The present invention has the following configuration in order to achieve the above object. That is, a main body made of a rigid body having an airtight chamber, a cylindrical cuff member made of a flexible member having translucency and elasticity sealed in the airtight chamber and having a wave surface pressure measuring body insertion hole, and the cuff member of this cuff member. A light emitting element and a light receiving element are provided on the outer circumferential wall to face each other with the arytenoid blood pressure measurement body insertion hole in between, and a fluid inlet is provided in the WsE main body so as to communicate with the airtight chamber.

``Function'' By making it possible to insert the tail of a small animal into a flexible cuff member that is transparent and elastic and equipped with a light-emitting element and a light-receiving element, blood pressure can be accurately measured without causing any damage to the tail of the small animal. Have it measured.

``Example'' An example of the present invention will be described below with reference to FIGS. 1 to 7. In Fig. 1, reference numeral 1 denotes a main body made of a rigid body, and this main body 1 consists of a cylinder 1 with rectangular flanges 3.3 on both ends of a cylinder 2, and rectangular fittings that match these flanges 3.3. consists of lids 5, 5 and covers 6, 7. The cylindrical body 4 is provided with a hole 10 consisting of a large diameter portion 8 and small diameter portions 9°9 located at both ends of the large diameter portion 8. A circular convex portion 11 is provided on each outer surface of Franz 3.3,
A circular concave portion 12 is formed in this convex portion 11 .

In addition, a fluid introduction pipe (fluid introduction port) 1 is provided on the outer periphery of the cylinder 2.
3 is integrally provided with an optical sensor 14, which will be described later.
It is also removable.

A cuff member 15 is hermetically fitted into the hole 10 of the cylinder 4. This cuff member I5 is made of a flexible and thin Noricon rubber with a thickness of about 0.2 to 0.5 mm, which contributes to translucency and elasticity, and has a tubular shape with Franz I 6.16 on both sides. Cuff part [15 is Franz l G
, IG are fitted into the recess I2 of the cylinder 4 and attached to the cylinder 1.

On the outer periphery of the cuff part (I5), there is an optical sensor structure 14a including a light emitting element 17, a light receiving element 18, and a sensor 14.
, the light emitting element 17. is inserted between the inner hole 15a of the cuff member 15.
It is detachably provided with the light receiving element 18 facing each other.

That is, the light emitting element 17 and the light receiving element 18 are provided on the outer periphery of the cuff member 15 in the following manner. As shown in FIG. 4, two metal rods 19b are fixed through a flanged columnar body 19a made of Noricon, with both ends thereof slightly protruding and spaced apart from each other, thereby forming a bushing 19c.

A lead wire +9d is connected to each of the two metal rods +9b protruding from one end of the bushing 19c on the Franz side. In addition, a pipe 19e made of Noricon is coaxially adhesively fixed to the other end of the bushing 19c without a flange, and a ring-shaped hood 19f made of black cloth is fitted to this pipe 19e. (No. 19 has been formed.

On the outer end surface of the pipe 19e of this element mounting member 19, there is a light emitting element (LED) +7 or a light emitting element (LED).
, iζ(1)AIi'i'! j/AIQhl-upper*L mail-ni mail 1-. =ITυ′)! , +r t1-, a1 This constitutes the optical sensor structure 14a.

Further, a light receiving element 18 is provided on the outer end surface of the pipe 19e of another element mounting member 19 having the same configuration as the element mounting member 19.
is attached with its lead wires connected to the two metal rods 19b. As a result, the optical sensor structure +4
b is configured.

Light emitting element (LED) +7. The light receiving elements (phototransistors) +8 are connected to metal rods 19b and 19b, respectively, using a generally well-known circuit configuration.

The optical sensor structure 14a is tightly fitted into the hole 4a formed in the cylinder 4 with the light emitting element 17 facing the cuff member 15 side, and the light emitting element 17 is brought into contact with the outer peripheral surface of the trunk of the cuff member 15. In this state, the flange side portion of the bushing 19c is fixed to the outer circumferential surface of the cylindrical body 4 using Noricon liquid.

Further, the sensor structure +4b is tightly fitted into the hole 4a formed in the cylinder body 4 with its light receiving element 18 facing the cuff member 15 side, and the light receiving element 18 is brought into contact with the outer circumferential surface of the body of the cuff member 15. In this state, the flange side portion of the bushing 19C is fixed to the outer circumferential surface of the cylinder 4 using Noricon liquid. However, the optical sensor components 14a and I4b can be removed from the cylinder body 4 by peeling off the portion to which the Noricon liquid is fixed from the outer periphery of the cylinder body 4.

Connecting wires 21 are connected to the lead wires +4d and f4d, respectively. This connecting wire 21 is inserted through the cover 6 and drawn out of the main body l.

A connector (not shown) is connected to the tip of the connecting wire 21.

The lid 5.3 is attached to the outside of the flange 3.3 of the cylinder 4.
5 are installed in four stacked configurations. For these installations, there are holes 5a, which are partially tapered holes in the lids 5, 5.
5a is formed. This makes the inner hole! 5a, hole 5
A blood pressure measurement body insertion hole 20 consisting of a and 5a is formed.

Further, the cover 6.7 is attached to the outside of the flange 3.3 and the mounting flow 5.5.

The cover 6 is connected to the fluid introduction pipe 13. It is fitted into the connecting wire 2I.

A pump 23. is connected to the fluid introduction pipe 13 via a pipe 22 as shown in FIG. A pressure transducer 24 is connected. This pressure transducer 2.1 is designed to be able to detect the pressure of a fluid and convert it into a voltage value. This pressure cadence user 24 has an amplifier 2.
5. Controller 26. A recorder 28 is connected via a DC motor 27. Furthermore, the light emitting element 17. A connecting wire 21 connected to the light receiving element 18 is connected to a recorder 28 via an amplifier 29. Note that a fluid chamber (airtight chamber) 30 is formed between the outer periphery of the cuff member 15 and the large diameter portion 8 of the cylindrical body 4. Further, 31 is a blood pressure measuring body (rat tail).

Next, the operation of the surface pressure measuring cuff constructed as described above will be explained. The tail of a small animal, for example, a rat, is inserted into the blood pressure measuring body insertion hole 20, and a predetermined portion near the base thereof is positioned within the cuff member 15.

Next, the optical sensor 14 is energized and the pump 23 is driven to supply air at a predetermined pressure to the fluid chamber 30. Then, the air pressure increases and the cuff member 15 is compressed and contracted in diameter, thereby stopping the flow of the IIII liquid in the rat's tail.

Next, when the air pressure in the fluid chamber 30 is reduced at a constant speed, blood begins to flow into the tail during this pressure reduction process, and a volume pulse wave amplitude develops, which is immediately detected by the optical sensor 14.
That is, the light emitted from the light-emitting element 17 and transmitted through the tail is detected by the light-receiving element 18, and the signal is recorded as the systolic blood pressure value in the recorder 28 via an amplifier.After this, the volume pulse wave amplitude reaches its maximum, and this is detected by the light-receiving element 18. Optical sensor I4 detects,
The detected signal is recorded as an average blood pressure value in 17+428 via an amplifier.

When the rat's tail is overly compressed by the air, the cuff member 15 is made of an elastic and flexible material, so the rat's tail is not damaged, and the hair on the rat's tail is pulled out by the friction between the cuff part +415 and the tail. ζ Do not raise or peel the skin, protect the rat's tail, thus eliminating the occurrence of changes in the rat's blood pressure due to the rat's flailing, and allow the rat's long blood pressure to be measured; This makes it possible to measure blood pressure over many generations in rats.

Further, according to this embodiment, the blood pressure measurement body insertion hole 20 does not have to be wrapped around the rat's tail each time as in the conventional case.
Since it is only necessary to insert the rat's tail into the inside, the operation is extremely easy and the number of operations can be greatly reduced, and the tail is not compressed by wrapping the tape, thereby preventing measurement errors in blood pressure measurement. Can be done. Furthermore, since silicone rubber is used for the cuff member 15, natural deterioration of this part is extremely small and the cuff member 15 has durability.

Furthermore, according to this embodiment, the optical sensor structure 14a,
14b, a cylindrical body 19a including a metal rod 19b, a vibrator 19e, a hood 19r1, a light emitting element 17, or a light receiving element 1.
8, these optical sensor components 14a,
1lIb is easy to assemble, the number of assembly steps can be reduced, and since the optical sensor components 14a and I4b can be attached and detached from the cylinder 4 and the cuff portion 4415, the light emitting element 17. The light receiving element 18 and the like can be easily replaced, and maintenance costs such as repairs can be reduced.

In addition, in the embodiment, the cylindrical body 4 and the cuff member 15
The optical sensor structures 14a and 14b are made detachable from the inner hole 1 of the cuff member 15, but are not limited thereto.
The light-emitting element 17 and the light-receiving element 18 are placed opposite each other by sandwiching the light-emitting element 17 and the light-receiving element 18, and the light-emitting element 17 and the light-receiving element 18 are coated with a silicone rubber liquid having a translucent property and adhered to the outer circumferential wall of the cuff member 15, and then removed to a suitable size. It's good to go.

Further, in the above embodiment, the cuff member 15 is made of soric rubber, but the cuff member 15 is not limited to this, and may be made of vinyl chloride as long as it has translucency, elasticity, and flexibility.

Furthermore, in the above embodiments, the present invention was applied to the blood pressure measurement of small animals, particularly rats, but the present invention is not limited thereto, and can also be applied to the blood pressure measurement of other living organisms.

"Effects of the Invention" According to the present invention, a main body made of a rigid body having an airtight chamber;
A cylindrical cuff member made of a flexible material having translucency and elasticity and having an insertion hole for a blood pressure measuring body enclosed in an airtight chamber, and an insertion hole for the blood pressure measuring body on the outer peripheral wall of this cuff member It consists of a light-emitting element and a light-receiving element that are arranged to face each other, and a fluid inlet that is provided in the main body so as to communicate with the airtight chamber, so that there is no need to cover the blood pressure measurement object in the insertion hole. All you need to do is insert the blood pressure measurement device, which makes the operation extremely easy and saves a lot of time.
In addition, since the cuff member is made of a flexible material with elasticity, it can protect the blood pressure measurement object and prevent the blood pressure measurement object from being scratched due to friction, and the cuff member can be easily attached to the blood pressure measurement object. Since the contact is offset, measurement errors in blood pressure measurement can be prevented, and blood pressure can always be measured accurately. Also,
When this invention is applied to small animals, it is only necessary to insert the small animal's tail into the insertion hole of the blood pressure measurement object, without having to wrap tape around the tail of the small animal each time as in the conventional case. It is extremely easy to use, greatly reducing the number of operations required, and the cuff member is flexible and protects the tail.
It can prevent the tail hair from falling out or peeling off the skin due to friction, thus eliminating the occurrence of changes in the blood pressure of small animals due to the small animals being upset, thereby making it possible to accurately measure the blood pressure of small animals. To perform long-term blood pressure measurement of small animals and to enable blood pressure measurement of small animals over many generations. In addition, it prevents pressure on the tail caused by wrapping the tape in the past, thereby preventing measurement errors in blood pressure measurement, thereby making it possible to accurately measure blood pressure in small animals.

[Brief explanation of drawings]

Figures 1 to 7 show one embodiment of the present invention, so
Figure 1 is a sectional view taken along the line 1-[ in Figure 2, Figure 2 is a front view, Figure 3 is a sectional view taken along line III--III in Figure 1, and Figure 4 is a cross-section of the element mounting member. 5 and 6 are cross-sectional views of the optical sensor assembly, and FIG. 7 is a block diagram of a Shoko/II blood pressure measuring device using the blood pressure measuring cuff of the present invention. I... Main body, 13...Fluid introduction T? (Fluid inlet)
, 1.1... Optical sensor, 15... Cuff member, 1
7... Light emitting element (LED), 18... Light receiving element (), 1. Totrannosk), 20...Wave surface pressure ii+1 fixed insertion hole, 2I...Connection wire, 30...
...Fluid chamber (airtight chamber).

Claims (2)

[Claims] (1) A main body made of a rigid body having an airtight chamber, a cylindrical cuff member made of a flexible member having translucency and elasticity sealed in the airtight chamber and having a blood pressure measuring body insertion hole, and a cuff member of this cuff member. It is characterized by comprising a light-emitting element and a light-receiving element, which are provided on the outer peripheral wall to face each other with the blood pressure measurement method insertion hole in between, and a fluid inlet port which is provided in the main body so as to communicate with the airtight chamber. Blood pressure measurement cuff. (2) The light-emitting element and the light-receiving element are removably provided on the outer circumferential wall of the cuff member so as to face each other with the blood pressure measurement object insertion hole in between. blood pressure measurement cuff.