JPS58206722A - Stethoscope having pulse display function - 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] The present invention relates to a medical stethoscope.

Traditionally, stethoscopes used by doctors have the function of highly sensitively capturing heart sounds using a resonance plate 1 and a resonance chamber 2, and guiding them to the ear through a conduit 3, isolating them from other noises, as shown in Figure 1. It is impossible for a doctor to diagnose 'l'y''# and to measure the pulse rate at the same time. It took time and effort.

The present invention provides a function to immediately convert and display the pulse rate per minute by installing a microphone in a part of the resonance chamber of the stethoscope, capturing one heart sound with the microphone, and detecting the heart sound electrical signal several times. The purpose of this addition is to eliminate the drawbacks of the stethoscope and improve its functionality.

Hereinafter, the present invention will be explained in detail with reference to one drawing.

FIG. 2 is a perspective view of an embodiment of the stethoscope according to the present invention from the rear. An electronic circuit storage section 4 is provided at the rear of the resonance chamber 2, a pulse display section 6'fc is provided at the rear of the electronic circuit storage section 4, and an activation switch 5 for the pulse count display section is provided at the side of the box. It is set up. By holding the operating switch 5 and the other side of the electronic circuit storage section 4 between your fingers and applying them to the chest of the injured person, you can not only diagnose the heart sound but also simultaneously detect the pulse rate display section 6.
It has a structure that displays the pulse rate sound. FIG. 3 represents a cross-sectional view of the stethoscope according to the invention of FIG. A heart sound detection microphone 7 is installed in a part of the inside of the resonance chamber 2, and the sound captured by the microphone 7 is transferred to the electronic circuit storage section 4.
The pulse rate is processed by an electronic circuit 8 including a power supply section in the heart rate display section 6 and displayed on the pulse display section 6. FIG. 4 shows a row of display patterns on the pulse display section 6, each time the electronic circuit 8 detects a heart sound.
The heart sound pulse flashing mark 9 flashes, and the pulse rate display section 1o displays the pulse every time several heart sound pulses are detected. 1 is a block diagram of an electronic circuit 8 for counting and displaying pulses according to the invention. The heart sound output from the heart sound detection microphone 7 and the electrical signal into which other noises have been converted are voltage amplified by a preamplifier 11, and a band pass filter 12 passes only the frequency components of the heart sound signal.
T-mail! +, further ′aL by the main amplifier 13
The pressure is amplified, input to the level detector 14, and converted into a pulse signal.

u Heart -] The pulse signal is measured by the counter 15 to measure the time between heart sound pulses, is converted to a pulse rate of 1 minute 1 u by the heart rate conversion ROM 16, and is further converted into a signal that drives the display section by the decoder 17 including a bold function. , and the pulse rate is displayed on the pulse display section 6. Here, the counter 15, heart rate 11 [ROM 16, and decoder 17] are controlled by signals from a standard clock source 18.

As described above, according to the stethoscope according to the present invention, the pulse rate can be determined at the same time as a single heart sound diagnosis, and the examination time for the doctor can be shortened. In addition, devices that measure pulse using electronic circuits use a method that captures heart sounds rather than a method that captures cardiac potential, so they are not affected by external electrical noise such as AC power, and patients can use their fingers to There's no need to touch it.

Furthermore, since the pulse can be measured while confirming both the heart sound and the pulse pulse blinking display section, there is also the effect that measurement due to malfunction when the electronic circuit captures noise can be prevented.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional stethoscope. 11. Sound board 26. Resonance chamber 3o, conduit ai Figure 2 shows a perspective view of an embodiment of a stethoscope with a pulse display function according to the present invention. 4゜, electronic circuit storage section 50. Pulse display function 6. Pulse display switch Figure 3 shows an embodiment of the stethoscope according to the present invention. Represents a diagram for use. 76. Heart Sound Detection Microphone 8°, Electronic Circuit FIG. 4 represents an embodiment of the display pattern of the pulse display portion of the stethoscope according to the present invention. 90. Pulse pulse blinking display section 10. . Pulse Rate Display Section FIG. 5 shows an example of a block diagram of the pulse count display circuit of the stethoscope according to the present invention. 110. Brianmp 12. Bandpass filter 130. Main amplifier 14. Level detector 156
．． Counter 160. Heart rate conversion ROM170. Decoder (includes 3 hold functions) 18. Standard clock source Applicant Daini Seikosha Co., Ltd. Agent Patent Attorney Suke Mogami Figure 1 Figure 2

Claims (1)

[Claims] In a medical stethoscope, a part of the resonance chamber is intercepted by a resonance plate for capturing heart sounds, a resonance chamber provided at the rear of the nuclear resonance plate, and a conduit for guiding heart sounds from the resonance chamber to the ear. A pulse display having the following features: the microphone 1 is provided with a function of converting the sound including the heart sound into an electrical signal using the microphone, and detecting the heart sound signal 1 by counting and displaying the electrical signal using an electronic circuit. A stethoscope with functions.