JP2010240380A - Blood collection tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow even a small amount of blood collection to be confirmed from the outside by reducing volume of the blood collection tube as a whole. <P>SOLUTION: The blood collection tube has a different diameter step part between a large diameter tube and a small diameter tube, wherein the large diameter tube has the same outer diameter as that of a normal blood collection tube. Thus, the blood collection tube can be attached to a generally used blood collection holder, and it is unnecessary to separately prepare a blood collection holder for the blood collection tube. In addition, sufficient height of a subject is secured even in the case of a small amount of blood collection, and confirmation of the blood collection and infiltration of a reagent and test paper, etc. are surely performed by providing the small diameter tube. In addition, the volume of the whole blood collection tube is reduced, and it does not become bulky in disposal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a blood collection tube for storing a sample collected from a living body and transporting it to an examination process.

  In blood testing departments at hospitals, clinics, and other medical institutions, blood collection workers (nurses, etc.) collect blood from patients, store the collected specimens in blood collection tubes, and transfer them to the laboratory. . In blood tests, various types of blood collection tubes are prepared in accordance with the blood test items, and the amount of blood collected varies depending on the test items. Usually, a plurality of types of examinations are performed simultaneously on one patient. Therefore, a plurality of types of blood collection tubes are automatically prepared by a blood collection tube preparation device for one patient.

  Recently, a vacuum blood collection tube has been widely adopted as a blood collection tube, in which a plug is attached to the opening of the blood collection tube main body and the inside is decompressed so that blood from a living body can easily flow into the blood collection tube. . As shown in Patent Document 1, the vacuum blood collection tube is inserted and held from the opening side of the cylindrical blood collection holder, the blood collection needle is attached to the multi-end side of the blood collection holder, and the blood collection needle is inserted into the blood vessel of the living body. The blood is collected into the blood collection tube using the reduced pressure of the blood collection tube.

  However, in the vacuum blood collection tube, if the blood donor is accidentally removed from the blood collection patient's arm before the vacuum blood collection tube is removed from the blood collection needle, the pressure inside the blood collection patient's blood vessel is higher than the internal pressure of the vacuum blood collection tube. The collected blood sometimes flowed back from the vacuum blood collection tube to the blood vessel side. As a technique for preventing such backflow, there is a technique disclosed in Patent Document 2.

  In the technique shown in Patent Document 2, a blood collection needle adapter to which a blood collection needle body is attached is used for vacuum blood collection using a vacuum blood collection tube. The blood collection needle adapter is configured such that a communication needle inserted into a vacuum blood collection tube and a blood collection needle portion inserted into the blood vessel are opposed to each other from both ends. And, in the adapter body, a blood flow path communicating with the blood collection needle portion and the communication needle is provided, and in the middle of the blood flow path, a hole is formed so as to intersect the blood flow path, and a valve is attached. The blood channel is connected or blocked.

JP-A-8-322819 JP 2005-245704 A

As shown in Patent Document 2, the vacuum blood collection tube has a constant outer diameter (13 mm) and a length of 100 mm or 75 mm, and is made of plastic (PET or the like) and glass. On the other hand, the amount of blood collected varies depending on the inspection item, but is secured for a certain height so that the blood collection operator can easily confirm it. For this reason, if the outer diameter of the blood collection tube is 13 mm, 5 to 6 ml of blood is collected even if 2 to 3 ml is sufficient, and there is a disadvantage that blood more than necessary is collected.
Moreover, when the whole has an outer diameter of 13 mm, the entire volume of the blood collection tube itself is increased, and there is a drawback in that waste at the time of disposal becomes bulky.

  The present invention has been improved and removed in view of the above-described conventional problems. When a small amount of blood collection is required, the blood collection amount corresponding to this can be secured, and the volume of the entire blood collection tube is reduced. Thus, it is intended to provide a blood collection tube that is not bulky at the time of disposal.

  Thus, in order to solve the above-mentioned problems, the means of claim 1 adopted by the present invention includes a large-diameter pipe portion fitted and attached to the blood collection holder, and a small-diameter pipe portion continuous with the large-diameter pipe portion. Thus, the small-diameter tube portion is a container for collecting a collected sample, and can ensure a high sample height even with a small amount of collected blood, and can confirm blood collection or infiltrate reagent test paper. This is a blood collection tube characterized by the above.

    In the invention of claim 1, the blood collection tube has a different diameter step portion of a large diameter tube portion and a small diameter tube portion, and the large diameter tube portion has the same outer diameter as a normal blood collection tube. ing. Therefore, the blood collection tube can be attached to a commonly used blood collection holder, and it is not necessary to prepare a separate blood collection holder for the blood collection tube. Further, by providing a small diameter tube portion, a sufficient specimen height can be ensured even with a small amount of blood collected, and confirmation of blood collection and infiltration of reagent test paper can be performed reliably. In addition, the volume of the entire blood collection tube can be reduced and does not become bulky when discarded.

It is a side view which shows an example of the blood collection needle | hook used for this invention. It is a longitudinal cross-sectional side view which shows an example of the blood collection needle used for this invention. 1 is a perspective view of a blood collection tube according to an embodiment of the present invention. It is a side view which shows the state which concerns on one embodiment of this invention and with which the blood collection needle and the blood collection tube were mounted | worn to the blood collection holder.

  The configuration of the present invention will be described below based on the embodiment of the invention shown in the drawings. 1 is a side view of the blood collection needle 1, FIG. 2 is a side view of the longitudinal section thereof, FIG. 3 is a perspective view of the blood collection tube 6, and FIG. 4 shows a state where the blood collection needle 1 and the blood collection tube 6 are mounted on the blood collection holder 9. It is a side view. As shown in FIGS. 1 and 2, the blood collection needle 1 includes a blood collection needle portion 2 inserted into a blood vessel of a living body, a sleeve 3 connected to the blood collection tube 5 side, and the blood collection needle portion 2 and the sleeve 3. It is comprised by the joint part 4 which interposes and connects these mutually in the middle. And the joint part 4 is shape | molded by the transparent plastic material etc., The hollow pressure chamber 5 is formed in the inside. The downstream end of the blood collection needle 2 and the upstream end of the sleeve 3 open to the pressure chamber 5 and are connected to each other via the pressure chamber 5. The opening area of the opening 2 a facing the pressure chamber 5 of the blood collection needle 2 is set larger than the opening area of the opening 3 a facing the pressure chamber 5 of the sleeve 3.

  On the other hand, as shown in FIG. 3, the blood collection tube 6 is a bottomed cylindrical plastic (PET), a biodegradable plastic or a glass tube having an open end. The blood collection tube 6 has a large-diameter tube portion 7 on the opening 6 a side at the tip, and a small-diameter tube portion 8 is formed continuously with the large-diameter tube portion 7. The outer diameter of the large-diameter tube portion 7 is set to 13 mm, which is the same as the outer diameter of a normal general blood collection tube. Moreover, the outer diameter of the small diameter pipe part 8 is set to 7 mm. Furthermore, the total length of the blood collection tube 6 is 75 mm or 100 mm. Note that a stopper (not shown) such as rubber is attached to the opening 6a of the blood collection tube 6, and the inside is decompressed. The reduced pressure is set according to the amount of blood collected. In the case of the present invention, the pressure is set to be about 20 to 30% lower than the normal pressure reduction pressure.

  Next, a blood collection procedure using the blood collection needle 1 and the blood collection tube 6 configured as described above will be described. First, the blood collection needle 1 is fitted and attached to the external upper end side (the left end side of the holder main body in FIG. 4) of a blood collection holder 9 (see FIG. 4) that is generally used. At this time, since the joint portion 4 of the blood collection needle 1 has a moderately large outer diameter, consideration is given to facilitating the mounting operation when it is picked and mounted. When the blood collection needle 1 is mounted on the blood collection holder, the sleeve 3 of the blood collection needle 1 is inserted through the center of the tube of the blood collection holder.

    Next, blood collection work is started. For blood collection, a blood-driving body is tied to the patient's arm and the internal pressure of the blood vessel is increased, and the needle tip of the blood collection needle portion 2 of the blood collection needle 1 attached to the blood collection holder 9 is inserted into the patient's blood vessel. Then, from such a state, the open end side of the blood collection tube 6 to which the plug is attached is pushed into the tube of the blood collection holder 9 to be fitted and attached. When the sleeve 3 of the blood collection needle 1 pierces and penetrates the stopper and is inserted into the blood collection tube 6, blood flows from the blood vessel side to the blood collection tube 6 side through the blood collection needle 1 due to the reduced pressure of the blood collection tube. Become. This blood flow can be confirmed from the outside because the joint portion 4 is formed of a transparent material, which is convenient for blood collection workers.

  The blood collection needle 1 in this embodiment is set so that the opening area of the blood collection needle portion 2 to the pressure chamber 5 is larger than the opening area of the sleeve 3 to the pressure chamber 5. Therefore, if the pressure on the blood vessel side of the patient is constant, the blood collection needle portion 2 facing the pressure chamber 5 and the sleeve 3 flow into the sleeve 3 from the pressure chamber 5 as compared with the case where the opening areas of the blood collection needle portion 2 and the sleeve 3 are the same. As a result, the pressure of blood flowing through this increases.

  Therefore, when a certain amount of blood is collected into the blood collection tube 6, the decompression pressure of the blood collection tube 6 at the time of manufacture can be set low by an amount corresponding to the increase in the pressure, and the decompression pressure is high at the start of blood collection. Thus, it is possible to prevent the blood vessels that have been generated from being crushed and the upper wall and the lower wall from coming into close contact with each other. Further, even when the blood-driving body is removed before the blood collection needle 2 is accidentally pulled out from the patient's blood vessel, a phenomenon occurs in which the blood collected from the blood collection tube 6 to the patient's blood vessel flows backward because the decompression pressure is low. Can be drastically reduced.

  The blood collection tube 6 is provided with a large-diameter tube portion 7 and a small-diameter tube portion 8, and the outer diameter of the large-diameter tube portion 7 is set to 13 mm, which is the same as a commercially available normal blood collection tube. Therefore, it is possible to attach the blood collection tube 6 to a commonly used blood collection holder 9, and it is not necessary to prepare a separate blood collection holder for the blood collection tube 6. Furthermore, by providing the small diameter tube portion 8 and setting the outer diameter of the small diameter tube portion 8 to about 7 mm, it is possible to ensure a sufficient specimen height even in the case of a small amount of collected blood, and confirmation of blood collection and reagent test The paper can be reliably infiltrated. By providing the small-diameter tube portion 8 in this way, the entire volume of the blood collection tube 6 can be reduced, so that it is not bulky when the blood collection tube is discarded. Furthermore, when the blood collection tube 6 is formed of biodegradable plastic, it can be buried in the soil and disposed of.

  The present invention is not limited to the embodiment described above, and appropriate modifications are possible. For example, the outer diameter of the small diameter tube portion 8 of the blood collection tube 6 may be an outer diameter in the range of 5 to 10 mm other than 7 mm.

DESCRIPTION OF SYMBOLS 1 ... Blood collection needle 2 ... Blood collection needle part 2a ... Blood collection needle opening 3 ... Sleeve 3a ... Sleeve opening 4 ... Joint part 5 ... Pressure chamber 6 ... Blood collection tube 6a ... Opening 7 ... Large diameter pipe part 8 ... Small diameter pipe part 9 ... Blood collection holder

Claims (1)

  A large-diameter tube portion fitted and attached to the blood collection holder and a small-diameter tube portion continuous to the large-diameter tube portion, and the small-diameter tube portion is a storage portion for a collected sample, even if the amount of collected blood is small A blood collection tube characterized by being able to ensure a high specimen height and confirming blood collection or infiltration of reagent test paper.

Images