The present invention relates to a body fluid collector and a body fluid collection method, wherein the body fluid collector is used by being installed on a component measuring device, and the component measuring device performs measurement, and the body fluid collection method is a method for collecting body fluid during, for example, a physical examination.
In the prior art, in order to measure various components in blood, a method of measuring reaction products of specific molds that chemically react with specific components in blood has been studied. Especially in order to monitor the patient's state, it is very important to measure the blood sugar value, and the patient monitors the daily changes of the blood sugar value himself. In addition, in recent years, due to the increasing number of diabetic patients, people need a simple and painless measurement method and device.
In most cases, saliva collectors are used to measure blood sugar through chemical reactions in which enzymes (such as glucose oxidase or dehydrogenase) oxidize glucose. At present, it is used to measure blood sugar by blood sugar measuring device according to the following methods, namely colorimetric method and electrode method. The colorimetric method is as follows: install a test paper with sugar content, provide blood to the test paper, smear the blood on the test paper to make the test paper develop color, and measure the color development degree (color measurement) by optical method, thus quantifying the blood sugar value. The electrode method is to measure the product of the above-mentioned enzyme reaction by electrical method.
In the colorimetric blood glucose measurement, generally speaking, the blood glucose is measured after the chip (body fluid collector) assembled with the test paper is installed on the blood glucose measuring device. In this chip, there is a blood channel (body fluid delivery channel), which collects blood (body fluid) from the blood inflow port and delivers the blood to the test paper through capillary phenomenon.
However, due to the high viscosity of blood, blood sometimes stays in the blood channel. Especially, this blood retention is likely to occur in the blood channel near the opposite side), or in the blood channel where the blood delivery direction changes, this blood retention occurs in the part where the blood delivery direction changes. In this case, because the blood sugar value cannot be measured, the chip must be scrapped and the patient will have to take blood again, thus increasing the burden.
Therefore, for example, in Japanese Patent Publication No.200 1-3 14394, a chip is proposed to solve the above problems, that is, the delivery side of blood in the blood channel is opposite and faces the blood channel. A convex part is set in the chip to reduce the meniscus of blood column near the convex part, hoping to successfully realize the purpose of blood delivery through capillary phenomenon.
However, in this chip, the convex part is arranged on the side of the blood inflow port, which actually does not completely solve the problem that blood stays in the part of the blood channel close to the test paper.
An object of the present invention is to provide a body fluid collector capable of reliably and quickly conveying body fluids to a detection part, and a body fluid collection method capable of collecting body fluids more reliably and quickly.
In order to achieve the above object, the technical device of the present invention is characterized in that it has a main body part and a detection part, wherein the main body part is provided with a body fluid delivery channel, the detection part is arranged on the main body part and detects a specific component in the body fluid delivered by the body fluid, and a convex part is arranged on the main body part, which overlaps with the detection part in plan view and faces the body fluid delivery channel.
In the body fluid collector of the present invention, the body fluid delivery channel has a first body fluid delivery channel and a second body fluid delivery channel, the first body fluid delivery channel is open to the body fluid inflow port, and the second body fluid delivery channel and the first body fluid delivery channel are arranged at the end of the body fluid outflow port side of the first body fluid delivery channel and extend into the second body fluid delivery channel.
Saliva collector In the body fluid collector of the present invention, the body fluid conveying direction in the first body fluid conveying channel and the body fluid conveying direction in the second body fluid conveying channel are preferably substantially orthogonal to each other.
In the body fluid collector of the present invention, it is preferable that the convex portion is hydrophilized on its surface.
In the body fluid collector of the present invention, the reduced cross-sectional area is preferably arranged near the body fluid outlet of the body fluid delivery channel.
In the body fluid collector of the present invention, it is preferable that the main body portion has a lower portion and an upper portion, and the upper portion is superposed on the lower portion and forms a part of the body fluid delivery channel together with the lower portion.
In the body fluid collector of the present invention, it is preferable to have a puncture needle, and a sharp needle tip is provided at the front end of the puncture needle, and the puncture needle pierces the skin through the needle tip to make the body fluid flow out.
Saliva collector The body fluid collection method of the present invention is characterized in that the body fluid collection method uses a body fluid collector and uses a body fluid collector and a detection part. The body part is provided with a body fluid delivery channel for collecting body fluid from the body fluid inflow port and delivering it to the body fluid outflow port, and the detection part is arranged to detect a specific component in the body fluid delivered by the body fluid delivery channel. The main body part is provided with a convex part, which overlaps with the detection part in plan view.