JPS61125326A - Hemomanometer - 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 [Technical Field 1] The present invention relates to a sphygmomanometer for indirectly measuring blood pressure using Korotkoff sounds.

[Background technology A conventional blood pressure monitor is shown in Figures 12 and 13.

The ischemic cuff 1 is stored inside a cuff band 2 that is wrapped around the arm, and the ischemic cuff 1 is inflated by sending air into the ischemic cuff 1 through a rubber tube 4.
The blood pressure measurement method is based on the Baronochi-Flotoko 7 blood pressure measurement method, in which the artery 3 is ischemized by the expansion of the cuff, and the sensor 5 detects the Flotoco 7 sound generated at this time, and the ischemic cuff pressure is displayed as a blood pressure value. By the way, in the conventional blood pressure monitor, the sensor 5 for detecting the Korotkoff sound directly detects the Korotkoff sound, and at this point the sensor 5 is placed between the ischemic cuff 1 and the human body. This structure prevents the sensor 5 from rising above the skin when measuring blood pressure, but with this configuration, the sensor 5 interferes with blood ischemia, and a large pulse sound component is detected. However, there are problems in that the converted output changes depending on the cuff pressure.

[Objective of the Invention 1] The present invention has been made in view of the above points, and its purpose is to prevent the sensor from interfering with blood ischemia, and to suppress the detection of pulse sound components by the sensor. Furthermore, it is an object of the present invention to provide a blood pressure monitor that has advantages such as no fluctuation in sensor output due to cuff pressure.

[Disclosure of the Invention] Accordingly, the present invention has a vf characteristic in that a vibration sensor that detects Korotkoff sounds by vibration of the ischemic cuff or the air inside the ischemic cuff is arranged in the internal space of the ischemic cuff, By placing the sensor in the internal space of the ischemic cuff, the sensor does not interfere with ischemia. We were able to detect Korotkoff sounds by detecting air vibrations.

The present invention will be described in detail below based on the illustrated embodiments.
FIG. 2 shows a blood pressure monitor according to one embodiment, in which a cuff band 2 housing an ischemic cuff 1 to which a pump 9 is connected via a rubber tube 4 shows blood pressure. The main body 10 equipped with the first display part etc. is integrated, and the frame 12 of the main body 10 faces the internal space of the ischemic cuff 1.The cuff band 2 is wrapped around the upper arm and used.

The sphygmomanometer shown in FIGS. 3 to 5 measures blood pressure from the artery in the wrist by ischemizing the artery, and an ischemic cuff 1 is attached to one side of the main body 10. The seven frames 12 of the main body 10 are configured to face the inner space of the ischemic cuff 1.

The sensor 5 for detecting the Kotkoff sound provided in these blood pressure monitors is formed as a vibration sensor that captures air vibrations within the ischemic cuff 1 or vibrations of the ischemic cuff 1. installed in space. Since the frame 12 faces the space inside the ischemic cuff 1, the sensor 5 can be attached to the frame 121.

Now, the Korotkoff sound detection sensor 5 as a vibration sensor here is formed by a condenser microphone as shown in FIG. 6, for example. The sensor 5 shown in FIG.
and a thin-film cathode plate 15 facing the top, and an insulator 17
The cathode plate 15 and the anode plate 16 are attached to the seven frames 12 by a mounting plate 14 having an IjL shape and a conductor. Here, the cathode plate 15 is connected to the mounting plate 14, and the anode plate 16 is connected to the mounting plate 14 by an insulator 18.
Terminals 16' held in position 2 are fully provided. The space between the anode plate 16 and the seventh frame 12 communicates with the internal space of the ischemic cuff 1 through a vent hole 19, and further communicates with the interior space of the anemic cuff 1 between the anode plate 15 and the F! Pole plate 1
Since the space between the anode plate 16 and the anode plate 16 communicates with the above space through a small hole provided in the anode plate 16, changes in the internal pressure of the ischemic cuff 1 due to the increase or decrease in pressure affect the thin film cathode plate 15 with pressure fluctuations. Never.

Then, air is pumped into the ischemic cuff 1 to inflate it, compressing the artery and causing ischemia, and then the air inside the ischemic cuff 1 is gradually pumped out to measure blood pressure during this evacuation. However, the vibrations that rise to the Korotkoff sound, which is a component of the arterial sound generated at this time, are propagated to the ischemic cuff 1 and the space inside the ischemic cuff 1.

In other words, the space inside the ischemic cuff 1 vibrates (I), and along with this vibration, the thin film cathode plate 15 also vibrates, causing the anode plate 16 to vibrate.
change the potential difference between Korotkoff sounds are detected from changes in this potential difference.

In addition to the condenser microphone shown here,
Any type of Y can be used as long as it has air holes and can maintain pressure balance before and after the vibrating membrane.
U/Also, even if it's Deesa, (of course it can be accepted).

7 and 8 show a piezoelectric transducer 2 as a sensor 5.
An example using 0 is shown. The piezoelectric transducer 10 here is flexible and has electrodes treated on both sides by means such as vapor deposition. Main body 10-7
The frame 12 is formed in the frame 12 and held by the fixing g621, so that it is installed in a flexed state between the frame 12 and the inner surface of the ischemic cuff 1.
Connected to internal circuit. In this device, as the ischemic cuff 1 vibrates due to the Korotkoff sound, the piezoelectric transducer 20 vibrates with expansion and contraction in the X direction in FIG. Since a potential is generated, the Korotkoff sound is detected by detecting this potential.

Furthermore, as the sensor 5, as shown in FIG. 19, an acceleration detection plastic vibration sensor 27 can be used, which is attached to the inner surface of the ischemic cuff 1 on the side that comes into contact with the skin of the human body. The acceleration detection desired vibration sensor 27 has a piezoelectric transducer 29 adhesively fixed on a base 28 provided on the inner surface of the ischemic cuff 1 as shown in FIG. As shown in Fig. 1, the device is fixed with adhesive and detects acceleration by compressive strain.
A piezoelectric transducer 29 is mounted on the distal end surface of a cylindrical base 28 formed on the inner surface of the ischemic cuff 1, and a mass body 3 is mounted on the piezoelectric transducer 29.
It is possible to use a device that detects acceleration by detecting deflection strain by fixing 0 with adhesive. In either case, the vibration of the ischemic cuff 1 due to the Korotkoff sound is not detected as an acceleration change, and the Korotkoff sound is detected using this.

[Effects of the Invention] As described above, in the present invention, the sensor for detecting Korotkoff sounds is placed in the inner space of the ischemic cuff, and it is difficult to prevent the sensor from getting in the way of ischemia when it ascends to the ischemic cuff. In addition, the sensor can detect Korotkoff sounds more clearly by suppressing pulse sound components, and the detection output of Korotkoff sounds does not change depending on cuff pressure. This makes it easy to store the sensor for detecting the 7 sounds of the Flotoco in a device that integrates the body of the blood pressure monitor and the body of the blood pressure monitor.

[Brief explanation of drawings]

Figure 1 is a sectional view of one embodiment of the present invention, Figure 2 is a perspective view of the same as above, Figure tjS3 is a sectional view of another embodiment, Figures 4 and 5.
The figures are a sectional view and a plan view showing the state of use of the same as above, Fig. 6 is a sectional view of an example of a sensor for detecting Korotkoff sound, Fig. 7 is a sectional view of an example of a sensor pond, and Fig. 8 is a sectional view of an example of the sensor for detecting the Korotkoff sound. Perspective view showing the operating principle, p! Figure S9 is a cross-sectional view showing an example of a pond sensor, Figures 101 and 1 are cross-sectional views showing specific examples of the same sensor, Figure tI412 is a perspective view of a conventional example, and Figure 13 is a cross-sectional view of the same sensor. In the figure, 1 is an ischemic cuff, 5 is a sensor, 10 is a main body, 12 is a frame, and 15
16 is a cathode plate, 16 is an anode plate, 20 is a piezoelectric transducer, and 27 is an acceleration detection type vibration jitter/cer. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 Figure 2 Figure 6 Figure S Figure 8 Figure 9 Figure 10 Figure 1

Claims (4)

[Claims] (1) A blood pressure monitor characterized in that a vibration sensor that detects Korotkoff sounds by vibration of the ischemic cuff or the air inside the ischemic cuff is arranged in the internal space of the ischemic cuff. (2) The vibration sensor is a condenser microphone with a thin film cathode plate and an anode plate facing each other, and the space between the cathode plate and the anode plate is connected to the space inside the ischemic cuff through a small hole formed in the anode plate. The blood pressure monitor according to claim 1, characterized in that the blood pressure monitor is in communication. (3) A patent claim characterized in that the vibration sensor is a flexible piezoelectric transducer installed between the inner surface of the ischemic cuff and the main body frame of the blood pressure monitor, which is integrated with the ischemic cuff. The blood pressure monitor according to item 1. (4) The blood pressure monitor according to claim 1, wherein the vibration sensor is an acceleration detection type vibration sensor attached to the inner surface of the surface of the ischemic cuff that comes into contact with the human body.