JPH05162Y2 - - Google Patents

Description

[Detailed description of the invention] Background of the invention (1) Technical field The present invention includes a pressurization pump that has an automatic pressurization function that increases cuff pressure to a set pressure value.
The present invention relates to an electronic blood pressure monitor that measures blood pressure using a signal corresponding to the Korotkoff sound generated during the cuff pressure reduction process.

(2) Prior art and its problems In conventional electronic sphygmomanometers with an automatic pressurization function, after increasing the cuff pressure in the cuff wrapped around the arm of the person to be measured using a diaphragm pump to measure blood pressure, The pressure is gradually reduced using a constant-speed exhaust valve, and the blood pressure of the subject is measured by detecting the Korotkoff sound generated by the blood vessels when the pressure is reduced. When the measurement is completed, the air in the cuff is evacuated at once by a quick exhaust valve to prepare for the next measurement.

However, in the past, the pump chamber of the diaphragm pump, the constant speed exhaust valve, and the supply/exhaust manifold were configured separately, so the volume they occupied was large, and the shape of the electronic blood pressure monitor itself was also large. It was closed. For this reason, it took time to pressurize and exhaust, and the energy consumption of the battery as a power source was severe.

In addition, when a pressure sensor connection part is provided in the air flow path during constant-speed exhaust, negative effects related to pressure measurement such as the bench-lily effect occur due to the structure of the flow path, making accurate pressure measurement difficult. .

For example, as in Utility Model Application No. 56-154222, the cuff pressure sensor, pressure pump, constant speed pressure reducing valve, etc. are completely separate, and each component is connected with a rubber tube, which is a very complicated structure. Therefore, complicated piping was required. Moreover, with conventional electronic blood pressure monitors,
No. 65-154222, no special attention was paid to the positional relationship between the passage of air from the wristband and the constant-speed exhaust valve, and the passage of air between these and the pressure sensor. A pressure sensor is installed between the air passage to the cuff, the constant speed exhaust valve, and the air passage to the arm cuff, and when detecting a signal corresponding to the Korotkoff sound that occurs during the cuff pressure reduction process, This has the drawback that pressure fluctuations due to the airflow flowing from the band to the constant-speed exhaust valve affect the pressure sensor, and the pressure sensor is also affected by the air pressure fluctuations caused by the exhaust. For this reason, it has been difficult to detect signals corresponding to accurate Korotkoff sounds.

Purpose of the invention The present invention eliminates the problems of the prior art described above, reduces the volume of the pressurizing pump and manifold, and devises the position of each connection to eliminate the influence of air flow during constant-speed exhaust. The purpose is to provide an electronic blood pressure monitor.

Structure of the idea The purpose of the present invention is achieved by the following configuration.

That is, it is equipped with a pressure pump that has an automatic pressurization function that increases the cuff pressure to a set pressure value, and blood pressure measurement is performed by detecting a signal corresponding to the Korotkoff sound that occurs during the process of reducing the cuff pressure. The electronic blood pressure monitor is an electronic blood pressure monitor that is integrally provided with a manifold on the exhaust side of the pump chamber of the pressure pump for supplying pressurized air to a predetermined part of the blood pressure monitor, and at least the manifold includes a pressure measuring means. A connection part, an air passage part to the cuff, and a constant speed exhaust valve are arranged,
The connection to the pressure measuring means is connected during the depressurization process.
This is achieved by an electronic sphygmomanometer, characterized in that the electronic blood pressure monitor is disposed at a position where air does not flow from the arm cuff to the constant speed exhaust valve via the air passage section to the arm cuff.

Further, according to a preferred embodiment of the present invention, the manifold of the pressurizing pump has a connecting portion to the pressure measuring means located at a position remote from the air passage to the cuff and the position where the constant speed exhaust valve is provided. This is achieved by an electronic blood pressure monitor characterized by:

Detailed Description and Effects of the Invention Hereinafter, an embodiment of the invention will be described in detail with reference to the drawings.

1 to 6 are diagrams showing the structure of a pressurizing pump according to an embodiment of the present invention.

In the figure, 1 is a pump frame, and the pump frame consists of a frame A2 and a frame B3 made of hard plastic.
The frame body A2 and the frame body B3 form an inner chamber 4, and the frame body A2
A diaphragm 5 made of silicone rubber is interposed between the frame body B3 and the frame body B3, and the inner chamber 4 is divided by the diaphragm 5. 6 is a pump drive motor, and the pump drive motor 6 is attached to the frame A2 by a motor attachment plate 7. 8 is a cam fixed to the drive shaft of the pump drive motor 6, and the diaphragm 5 is pivotally attached to the shaft provided on the cam 8. Further, 9 is a pump chamber formed by frame body A2 and diaphragm 5, 10 is an intake valve consisting of intake valve seat 11 of frame body A2 and intake valve body 12 of diaphragm 5, and 13 is an exhaust valve of frame body B3. Exhaust valve 1 consisting of a valve seat 14 and an exhaust valve body 15 of a diaphragm 5
Reference numeral 6 denotes a supply/exhaust manifold having an exhaust valve 13 and a communication passage 17.

18 is a conduit connection part connected to a pressure transducer (not shown) for measuring cuff pressure in the cuff;
9 is a conduit connection part connected to a cuff (not shown); 20
is a conduit connection connected to a quick exhaust valve (not shown);
21 is a constant speed exhaust valve. The constant speed exhaust valve 21 has a slit in the closing part of an exhaust valve 22 made of silicone rubber, which is a stepped cylindrical body with one end closed, and a T-shaped flapper valve 23 made of resin (for example, hard vinyl chloride) is inserted into the slit. It is. A pressure buffer orifice 24 is provided between the constant speed exhaust valve 21 and the passage 17 of the supply/exhaust manifold.

In addition, the frame A2 has a similar hole on the opposite side to the motor mounting side, and this hole has a perforated frame cap 2.
5 is attached. The passage 17 of this supply/exhaust manifold 16 includes a pressure transducer connection 18, a cuff conduit connection 19, and a quick exhaust valve connection 2.
0, communicates with constant speed exhaust valve 21.

When the pump drive motor 6 rotates and the drive shaft of the motor rotates, the cam 8 also rotates, causing the diaphragm 5 to swing up and down. When the diaphragm 5 is moving in the direction of arrow A, the pressure inside the pump chamber 9 decreases, the intake valve 10 opens, and air is sucked in from the outside. At this time, the exhaust valve 13 is closed, and the air in the passage 17 in the supply/exhaust manifold 16 does not flow back into the pump chamber 9. When the pump drive motor 6 further rotates, the diaphragm 5 moves in the direction opposite to the arrow A, as shown by the broken line arrow, increasing the pressure within the pump chamber 9. Therefore, the intake valve 10 is closed, the exhaust valve 13 is opened, and the air in the pump chamber 9 is sent to the passage 17 in the supply/exhaust manifold 16.

By repeating the above operations, the cuff pressure within the cuff connected to the air supply/exhaust manifold 16 is increased. At this time, the pressure transducer, to which a pressure equal to the pressure inside the arm cuff is applied, constantly detects the pressure value, and when the pressure inside the arm cuff reaches a predetermined pressure, the pump drive motor 6
to stop.

On the other hand, a small amount of air is always exhausted from the constant speed exhaust valve 21, which is smaller than the amount of air supplied by the diaphragm pump.
This orifice buffers pressure fluctuations in the manifold passage, allowing for more constant exhaust speed. Therefore, after the motor 6 stops, the cuff pressure inside the cuff is reduced at a constant speed. At this time, as shown in FIGS. 1 and 3, the air inside the arm cuff flows into the constant speed exhaust valve 21 via the communication passage 17 and the pressure buffer orifice 24 from the conduit connecting part 19 connected to the arm cuff. , will be exhausted from the constant speed exhaust valve 21.

As a result, even when blood pressure measurement processing is performed, the air from the cuff during this depressurization process is exhausted without passing through the pressure transducer connection part 18, and the exhaust is not affected by air flow and has little pressure fluctuation. can be done. Therefore, by detecting a signal corresponding to the Korotkoff sound during this pressure reduction process, and determining the first signal as the systolic blood pressure and the time when the signal disappears as the diastolic blood pressure, very accurate blood pressure measurement can be performed.

As explained above, according to this embodiment, the electronic sphygmomanometer achieves miniaturization by integrally configuring the manifold in which the exhaust on the exhaust side of the pressurizing pump is branched into multiple parts and the constant speed exhaust valve. can provide services.

In addition, the supply and exhaust manifold of this embodiment has a pressure transducer connection part other than between the arm cuff conduit connection part and the constant speed exhaust valve, so when measuring pressure during the depressurization process, constant speed exhaust from the arm cuff is required. It is not affected by the air flowing to the valve.

Further, according to this embodiment, by providing the manifold and the frame integrally, it is possible to provide an electronic blood pressure monitor that can be further miniaturized.

In addition, the pressure buffer orifice buffers pressure fluctuations in the passage in the manifold caused by a diaphragm pump, etc., and applies less pressure to the constant speed exhaust valve to compensate for pressure fluctuations, making it possible to exhaust at a more constant speed.

Specific effects of the present invention As explained above, according to the present invention, even during the depressurization process, air during constant-speed exhaust does not pass through the connection to the pressure measuring means, so that the influence of such exhaust is reduced. We can provide an electronic blood pressure monitor that provides highly accurate blood pressure measurements.

Furthermore, by providing an integrated manifold on the exhaust side of the pressurizing pump, which has air distribution passages etc. to each component that uses pressurized air from the pressurizing pump, manufacturing is easy and compact. Accordingly, it is possible to provide an electronic blood pressure monitor that can efficiently distribute pressurized air from a pressurizing pump to each component such as a cuff that uses pressurized air from the pressurizing pump.

[Brief explanation of the drawing]

1 to 6 are drawings showing the detailed configuration of one embodiment of the pressurizing pump of the electronic blood pressure monitor according to the present invention. Figure 1 is a partially cutaway front view, Figure 2 is a front view of the diaphragm pump section in Figure 1, Figure 3 is a cross-sectional view taken along line A--A in Figure 1, and Figure 4 shows the frame A. FIG. 5 is a view of the diaphragm as seen from below, and FIG. 6 is a view of frame B as seen from above. In the figure, 1, 2, and 3 are the pump frame, 4 is the inner chamber of the pump frame, 5 is the diaphragm, 6 is the pump drive motor, 8 is the cam, 9 is the pump chamber, 10 is the intake valve,
11 is an intake valve seat, 12 is an intake valve body, 13 is an exhaust valve, 14 is an exhaust valve seat, 15 is an exhaust valve body, 16 is an exhaust manifold, 18 is a supply/exhaust manifold, 1
8, 19, 20 are conduits, 21 is a constant speed exhaust valve, 22
23 is an exhaust valve, 23 is a flapper valve, and 25 is a frame cap.

Claims (1)

[Claims for Utility Model Registration] (1) A pressurization pump having an automatic pressurization function that increases the cuff pressure to a set pressure value, and which emits a signal corresponding to the Korotkoff sound generated during the cuff pressure reduction process. An electronic sphygmomanometer that measures blood pressure by detecting blood pressure, wherein a manifold for supplying pressurized air to a predetermined part of the sphygmomanometer is integrally provided on the exhaust side of a pump chamber of a pressurizing pump, and at least The manifold is provided with a connection to the pressure measurement means, an air passage to the arm cuff, and a constant speed exhaust valve, and the connection to the pressure measurement means is connected to the arm cuff during a depressurization process. An electronic blood pressure monitor characterized in that the electronic blood pressure monitor is disposed at a position where air does not flow to the constant speed exhaust valve via the air passage section to the arm cuff. (2) The manifold of the pressurizing pump is of practical use, characterized in that the connecting part to the pressure measuring means is arranged at a position remote from the air passage to the cuff and the position where the constant speed exhaust valve is arranged. Scope of patent registration request No. 1
Electronic blood pressure monitor described in section.