JPS60232132A - Concentrated type oxymeter - 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 Field of the Invention The present invention relates to a central oximeter for measuring hemoglobin oxygen saturation in arterial blood.

"Prior Art" Conventionally, hemoglobin oxygen saturation was measured using two different lights, for example, light with wavelengths of about 650 nm and about 900 nm.
It is already known that it can be measured by measuring the light absorption ratio of oxidized or cyclic hemoglobin.
Specifically, there is an oximeter that measures hemoglobin oxygen saturation in arterial blood using an optical sensor placed on a patient's fingertip.

By the way, as shown in FIG. 3, this oximeter 1 includes an optical sensor 3 that is a combination of a light emitting diode and a light receiving element, which is attached to the tip of a finger 2f of a patient 2, and is connected to a measuring device body 5 via a preamplifier 4. In addition, a recorder 6 is connected to the main body 5. The optical signal detected by the optical sensor 3 is output as an optical digital signal from the measuring instrument main body 5, converted into a pg signal by the recorder 6, and recorded on the chart paper 7.

"If the problem is solved by the invention" - However, with such conventional oximeters, in order to measure a large number of patients, the number of measuring instruments must be increased in proportion to the number of patients. This has the disadvantage of increasing equipment costs.

Furthermore, if optical sensors are attached to two or three locations on a patient, the difference in measured values between the two main bodies and the number of chart sheets will increase, which is extremely inconvenient and wasteful.

Furthermore, when collecting data from a large number of specimens using a single measuring instrument, there is also the drawback that continuous measurement is not possible.

"Means for Solving the Problems" This invention was made by focusing on the above problems.
Cables from a plurality of optical sensors and preamplifiers are connected to a central actuator, the actuator is connected to a receiver by an optical fiber link, and a recorder and a computer are respectively connected to the receiver to form a central oximeter. It is constructed. Note that the central actuator selects a signal from a desired optical sensor.
It has a structure that integrates the main body of the measuring device that outputs light.

``Effect'' Optical sensors attached to each patient's hands or feet (adults wear them on their fingers, but for newborns it is more effective to wear them on their hands) measure the patient's blood hemobrevin oxygen saturation. The detected output passes through a preamplifier and enters a controller such as a switch of a central actuator, and a signal from a desired patient is selected and input to the main body of the measuring instrument. The body then sends out a digital optical output, while the scanner scans it at variable predetermined time intervals.

- The channels for each of the optical sensors are sequentially switched and a select channel symbol or code is selected as an optical serial signal. This information is transmitted to the receiver via optical fiber, where the received optical signal is converted into an electrical signal, and then output as analog signal 1 separated for each channel and connected to a multi-channel recorder. This allows each patient's data to be continuously monitored. Furthermore, the digital optical output is directly converted into a desired standard digital signal and provided to a computer, where it is utilized for various data analyses.

"Embodiment" Hereinafter, a first embodiment of the present invention will be described based on FIG. 1.

First, to describe the configuration, reference numeral 11 denotes a central oximeter, which measures a large number of patients using a single central actuator 13, and is particularly suitable for use in a neonatal room or premature baby room using an incubator box 14. In this embodiment, a configuration example is shown in which six patients 12A to 12F are treated.

15A to 15F (158 and below are not shown) are optical sensors attached to the hands of each patient 12A to 12F, and are connected to a controller built in the central actuator 13 via a cable 17 via preamplifiers 16A to 16F. It is connected. The connected side surface is provided with a measured value display 135 using, for example, an LED, and a measurement number display 13n that displays the patient number or incubator number to be measured. Next, an optical fiber link 18 transmitting the optical output from the scanner section and the measuring instrument section of the central actuator 13 is connected to the receiver 19, and further,
The receiver 19 is connected to a multi-channel recorder 20 and a computer 21 by cables 22, thereby configuring the centralized oximeter 11.

Next, to describe the operation, the outputs detected by the optical sensors 15A to 15F attached to the patients 12A to 12F are introduced to the controller section of the central actuator 13 via the preamplifiers 16A to 16F, respectively. , the controller section changes channel A at predetermined time intervals according to the signal generation of the scanner section.

B, C, . . . , F are sequentially switched, so the outputs of the sensors 15A to 15F are successively input to the measuring device section. At this time, the selected channel is displayed on the measured number display 13n, so the measured value display 1
It is possible to confirm which patient 12 the measured values displayed in 1 belong to. The measured value is converted into a digital optical output in the measuring instrument section and transmitted to the receiver 19 through the optical fiber link 1B along with the select channel symbol or code sent out from the scanner section as an optical serial signal. The information taken in by this light is converted into an electrical signal in the receiver 19, and then output as an analog signal separated for each channel, and then collectively recorded on a sheet of chart paper 23 in the multi-channel recorder 20. The data of each patient 12 can be continuously monitored. On the other hand, the digital optical output from the measuring instrument section is converted into a desired standard digital signal by the receiver 19 and provided to the computer 21, so that it can be utilized for various data analyses.

Next, a second embodiment will be described based on FIG. 2. In this embodiment, the functional units built in the central actuator 13 of the first embodiment are made independent, and the controller 31.degree. scanner 32. The measuring device main body 33 is used as the measuring device number display 32n, and the scanner 3 is used as the measuring device number display 32n.
2, the measurement value display device 33S is provided in each of the measuring instrument main bodies 33, and the configuration other than that the path from the controller 31 to the receiver 19 is divided into two, the scanner 32 and the measuring instrument main body 33, is the same as the first one. It is exactly the same as the example, and also has the same effect.

"Effects of the Invention" As explained above, this invention collects signals from multiple optical sensors in a controller, sequentially switches channels of the controller using a scanner, and manually converts the signals into optical digital signals to a measuring instrument. In addition to transmitting the measured values to the receiver, the scanner also transmits the select channel symbol as an optical serial signal, and further connects the receiver to a multichannel recorder and computer to record and analyze data for each patient. This configuration allows continuous measurement of multiple patients using a single central oximeter with short channel switching times, and records can be recorded on a single sheet of chart paper. Comparative analysis has become possible with the Humpyuta, making it easier to understand the progress of patients over long-term measurements.

Furthermore, since optical signal transmission is used, it is resistant to electrical noise and allows remote monitoring.
And digital signal transmission allows for use in conjunction with other measuring instruments, which can bring about remarkable effects.

Note that the scanning used in general measuring instruments is on the output signal side of the measuring instrument, but we have realized scanning on the input signal side.

Furthermore, by integrating the scanner, measuring instrument body, and controller, only one optical fiber link is required, which has the advantage of simplifying the configuration and simplifying installation and handling.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the outline of the configuration of the first embodiment of the present invention, Fig. 2 is a diagram corresponding to the first embodiment of the second embodiment, and Fig. 3 shows the outline of the arrangement of a conventional oximeter. FIG. 13... Prefectural actuator 15... Optical sensor 16... Preamplifier 18... Optical fiber link 19...
... Receiver 20 ... Multi-channel recorder 21 ...
・Computer 31...Controller 32...Scanner 33...Measuring instrument body 33S...Measuring instrument display

Claims (1)

[Claims] An optical sensor attached to each side of multiple patients to detect blood hemoglobin oxygen saturation, a controller that collects the signals from each sensor, and channel switching so that the signals from the controller are sequentially input to the measuring device. a scanner that centrally measures and displays blood hemoglobin oxygen saturation based on the input and outputs the measured value optically; and a measuring device that receives the optical output from the measuring device and the scanner via an optical fiber. A centralized oximeter comprising a receiver for demodulating, a recorder for recording electrical signals from the receiver, and a computer for storing and analyzing the electrical signals.