JPS62127669A - Blood analyzing instrument - Google Patents

Abstract

PURPOSE:To make thorough analysis in a sort period so as not to give a large burden to a patient by temporarily taking the blood out of the body for the purpose of inspection and returning the blood into the patient' body upon ending of the inspection. CONSTITUTION:The blood is introduced from the artery into a transparent vessel 3 via a catheter 1 by drawing out a piston of a piston cylinder 4. Light is conducted via an optical fiber 6 for projection from a light source 5 into the vessel 3 and the light transmitted through the blood in the vessel 3 is taken out by an optical fiber 7 for detection. The light is conducted to a spectroscope consisting of a slit 9, a plane mirror 10 and a diffraction grating 11. The spectrally divided light is detected by a photodiode array 12 and the output thereof is processed by a data processor 13. The diagnosis information such as biochemical inspection data is displayed by a display device 14. The blood is returned through the catheter 1 into the body by the piston cylinder 4 after the inspection.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a blood analyzer that can extract blood from a patient's artery or the like, analyze it on the spot, and return the blood after the analysis is completed.

(Prior Art) A method is known in which blood is collected from a human body and various biochemical tests are performed using an enzyme electrode method, an optical method, or the like.

Also known is a method of shining light from an LED (light emitting diode) onto a finger or the like and transcutaneously measuring blood oxygen using transmitted light or reflected light.

(Problems to be Solved by the Invention) In the analysis method described above in which blood is collected from the human body, frequent tests cannot be performed because the amount of blood in the body decreases due to blood collection. Particularly in the case of newborns and infants, there is a problem in that there is a limit to the amount of blood that can be collected, making it impossible to perform the necessary amount and frequent tests for diagnosis.

The above-mentioned method of projecting light from the surface of the skin and analyzing it using transmitted light, etc., can detect the condition of the skin (race, race, etc.).

There is a problem in that the absolute amount cannot be measured because the values of transmitted light and reflected light differ due to differences in the skin due to age, etc.

The purpose of the present invention is to provide a blood analyzer which solves the problems of conventional analysis methods, enables sufficient analysis in a short period of time, and does not place a large burden on patients.

In order to achieve the above object, the blood analyzer according to the present invention includes: a catheter connected to a blood vessel of a subject; a container connected to the catheter; a cylinder connected to the vessel, which sucks blood into the container from the blood vessel and returns the sucked blood to the blood vessel of the subject; and a projection which projects light from one side of the container into the container. a light source for supplying light to the projection optical fiber; a detection optical fiber for guiding light projected into the container and influenced by blood components in the container; It consists of an analyzer that analyzes light from an optical fiber.

(Example) The present invention will be explained in more detail with reference to the drawings and the like.

FIG. 1 is a block diagram showing an embodiment of a blood analyzer according to the present invention.

A transparent container 3 for temporarily receiving the patient's blood is coupled to a nozzle portion of a piston cylinder 4 having the same structure as a syringe.

This transparent container 3 is communicated with the patient's artery via a catheter 1 having a stopcock.

The tip of a projection optical fiber G for projecting light from a light source 5 into the container 3 is abutted against the side surface of the transparent container 3.

Further, so as to face the tip of the projection optical fiber halo,
The tip of the detection optical fiber 7 is abutted against the side surface of the container 3.

The fixing jig 8 is a fixing jig for maintaining the detection optical fiber 7, the projection optical fiber halo, and the container 3 in the above-mentioned relative positions.

The slit plate 9, total reflection mirror 10, and diffraction grating 11 form a spectrometer.

The light separated by the diffraction grating 11 is transmitted to the photodiode array 1
2 and is input to the data processing device 13 and analyzed. The display device 14 is a device that displays the analyzed content.

The operation of the device will be explained. The cock 2 is opened and the screw 1 of the piston cylinder 4 is pulled out to introduce blood from the artery into the transparent container 3 via the catheter 1. Light is guided from the light source 5 into the transparent container 3 via the projection optical fiber 6, and the light that has passed through the blood in the container 3 is taken out by the detection optical fiber 7. The light from the output end of the detection optical fiber 7 passes through the slit 9. Plane mirror 10. It is guided to a spectrometer consisting of a grating (diffraction grating) 11.

The photodiode array 12 transmits the light separated by the spectrometer.
Detect with. The output of the photodiode array 12 is processed by a data processing device 13, and a display device 14 displays diagnostic information such as biochemical test data obtained through analysis.

After the test, the blood is transferred to the catheter 1 by the piston cylinder 4.
It is returned to the body through

(Effects of the Invention) As explained in detail above, the blood analysis device according to the present invention includes a catheter connected to a blood vessel of a subject, a container connected to the catheter, and a container connected to the container. a piston cylinder that sucks blood into the container from the blood vessel and returns the once sucked blood to the blood vessel of the subject; a projection optical fiber that projects light from one side of the container into the container; a light source that supplies light to an optical fiber for projection; an optical fiber for detection that directs light that is projected into the container and influenced by components of blood in the container; and light from the optical fiber for detection. It consists of an analyzer that analyzes

According to the device, blood is temporarily taken out of the body for testing, but after the test is completed, the blood is returned to the patient's body.

Therefore, even patients from whom a large amount of blood cannot be collected, such as newborns and infants, can be tested many times.

Furthermore, since the analysis using the above device is systematic, it is possible to measure an absolute amount.

It is particularly effective in performing blood gas and biochemical tests over time from arteries or veins of critically ill patients such as ICU patients.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a blood analyzer that performs various biochemical tests from transmitted light of blood according to the present invention. 1... Catheter 2... Cock at the base of the catheter 3...
Transparent container 4... Piston cylinder 5... Light source 6... Optical fiber for projection... Optical fiber for detection 8... Fixing jig 9... Slit plate 10... Plane mirror 11... Grating (diffraction grating) 12... Photodiode array 13... Data processing device 14... Display device

Claims (3)

[Claims] (1) A catheter connected to a blood vessel of a subject, a container connected to the catheter, and a catheter connected to the container, which sucks blood from the blood vessel into the container, and once sucks the blood. a piston cylinder that returns light to the blood vessel of the subject; a projection optical fiber that projects light into the container from one side of the container; a light source that supplies light to the projection optical fiber; a detection optical fiber that directs the projected light influenced by the components of the blood in the container;
A blood analyzer comprising an analyzer that analyzes light from the detection optical fiber. (2) The blood analyzer according to claim 1, wherein the analyzer is a spectroscopic analyzer. (3) The blood analyzer according to claim 1, wherein the analyzer analyzes light transmitted through the blood in the container to obtain various biochemical test data.