CN-117443477-B - Structure for transferring and distributing blood from blood sampling tube without uncapping

Abstract

The invention discloses a structure for transferring and distributing blood from a blood taking tube without uncapping, which belongs to the technical field of medical auxiliary instruments and comprises a needle cylinder, a first piston push rod and a second piston push rod, wherein the pistons of the first piston push rod and the second piston push rod freely slide left and right in the needle cylinder, the upper part of the needle cylinder is connected with the blood taking tube, the joint of the blood taking tube and the needle cylinder is an upper opening, a first through hole is arranged above the needle cylinder, a steel needle a is arranged in the first through hole and is communicated with the blood taking tube, a second through hole is arranged beside the first through hole above the needle cylinder, a steel needle b is arranged in the second through hole, the steel needle b is communicated with the atmosphere, and a third through hole is arranged below the needle cylinder and is connected with a lower opening. The process of taking liquid by fixed volume is simply realized, no space is changed, the devices such as a pipette gun, a suction head and the like are omitted, the step of removing the cover of a blood collection tube is also omitted, and the device is directly operated, can take the blood in the blood collection tube by a small amount, is simple and convenient, and is suitable for the condition that specific indexes are detected along with the arrival.

Inventors

• ZHAO ZHU
• Zhang Nennan
• WANG YILONG
• WANG HAN
• WANG YONGJUN
• CHEN HE
• YANG MO
• YANG SHIBAO
• CHEN RONG
• CHEN WEIQI

Assignees

• 南京元康医学科技发展有限公司
• 首都医科大学附属北京天坛医院
• 南京宁丹新药技术有限公司

Dates

Publication Date

20260505

Application Date

20231115

Claims (6)

1. 1. The structure for transferring and distributing blood from a blood collection tube without uncapping is characterized by comprising a needle cylinder (1), a first piston push rod (2) and a second piston push rod (3), wherein the first piston push rod (2) and the second piston push rod (3) are oppositely and coaxially arranged at two sides of the needle cylinder, the pistons of the first piston push rod and the second piston push rod freely slide left and right in the needle cylinder, the upper part of the needle cylinder is connected with the blood collection tube (4), the joint of the blood collection tube (4) and the needle cylinder (1) is an upper opening (7), a first through hole (101) is arranged above the needle cylinder, a steel needle a (5) is arranged in the first through hole, the steel needle a is led into the blood collection tube, a second through hole (102) is arranged beside the first through hole above the needle cylinder, a steel needle b (6) is arranged in the second through hole, the steel needle b is led into the atmosphere, a third through hole (103) is arranged below the needle cylinder, and the third through hole is connected with a lower opening (8).
2. 2. The structure for transferring and distributing blood from a blood collection tube without uncapping according to claim 1, wherein a first limiting block (9) is arranged on the first piston push rod (2), the first limiting block (9) is positioned on the inner side of the syringe (1), and when the first limiting block is in contact with the syringe, the piston of the first piston push rod is positioned right below the upper opening (7) of the syringe.
3. 3. The structure for transferring and distributing blood from a blood collection tube without uncapping according to claim 1, wherein a second limiting block (10) is arranged on the second piston push rod (3), the second limiting block (10) is positioned on the outer side of the syringe (1), and when the second limiting block is in contact with the syringe, the piston of the second piston push rod is positioned right below the upper opening (7) of the syringe.
4. 4. The structure for transferring and distributing blood from a blood collection tube without uncapping according to claim 1, wherein a third limiting block (11) is arranged on the first piston push rod (2), the third limiting block (11) is positioned on the outer side of the syringe (1), and when the third limiting block is in contact with the syringe, the piston of the first piston push rod is positioned right above the lower opening (8) of the syringe.
5. 5. The structure for transferring and distributing blood from a blood collection tube without uncapping according to claim 1, wherein a fourth limiting block (12) is arranged on the second piston push rod (3), the fourth limiting block (12) is positioned on the inner side of the syringe (1), and when the fourth limiting block is in contact with the syringe, the piston of the second piston push rod is positioned right above the lower opening (8) of the syringe.
6. 6. The structure for transferring and distributing blood from a blood collection tube without opening the cover according to claim 1, wherein the syringe (1) is made of transparent material.

Description

Structure for transferring and distributing blood from blood sampling tube without uncapping Technical Field The invention belongs to the technical field of medical auxiliary instruments, and particularly relates to a structure for transferring and distributing blood from a blood sampling tube without uncovering. Background In the process of experimental operation, a common blood collection tube needs to be transferred and separated. In general, the method of taking out liquid can be referred to as a "pipette" method, i.e. a method of presetting a certain volume, filling it, and transferring it out, but a large container for holding liquid is needed to be used as a "pond", such as a blood collection tube, and the remaining tube of the cap is pulled out, or a method of a pump, such as a syringe pump, is used to push at a controllable speed for a given length or for a given time, and the pushed out liquid is also controllable in a fixed volume, or a method similar to a peristaltic pump is used to control the led out liquid by adding a rotational speed for time. The above operation is carried out by means of a large laboratory device such as a 'uncapping centrifuge', so that batch processing of a batch of blood collection tubes is suitable for operation of a large central laboratory, but defects are shown in more flexible occasions such as follow-up detection of specific detection samples and specific indexes. Disclosure of Invention In order to solve the above-mentioned problems, the invention discloses a structure for transferring and distributing blood from a blood collection tube without opening the cover, which can transfer the blood in a single blood collection tube, distribute the blood when necessary, and conveniently use the blood in combination with other microfluidic chip modules such as a gate valve, a one-way valve, a liquid storage bag, a pump and the like, thereby realizing the detection on a microfluidic chip or a micro structure at low cost. In order to achieve the above purpose, the specific technical scheme of the application is as follows: The structure for transferring and distributing blood from the blood taking tube without uncapping comprises a needle cylinder, a first piston push rod and a second piston push rod, wherein the first piston push rod and the second piston push rod are oppositely and coaxially arranged on two sides of the needle cylinder, the pistons of the first piston push rod and the second piston push rod freely slide left and right in the needle cylinder, the blood taking tube is connected above the needle cylinder, an upper opening is formed at the joint of the blood taking tube and the needle cylinder, a first through hole is formed above the needle cylinder, a steel needle a is arranged in the first through hole and is led into the blood taking tube, a second through hole is formed beside the first through hole above the needle cylinder, a steel needle b is arranged in the second through hole and is led to the atmosphere, a third through hole is formed below the needle cylinder, and the third through hole is connected with a lower opening. Based on the technical characteristics, further, the first piston push rod is provided with a first limiting block, the first limiting block is positioned on the inner side of the needle cylinder, and when the first limiting block is in contact with the needle cylinder, the piston of the first piston push rod is just positioned below the upper opening of the needle cylinder. Based on the technical characteristics, further, the second piston push rod is provided with a second limiting block, the second limiting block is positioned on the outer side of the needle cylinder, and when the second limiting block is in contact with the needle cylinder, the piston of the second piston push rod is just positioned below the upper opening of the needle cylinder. Based on the technical characteristics, further, a third limiting block is arranged on the first piston push rod, the third limiting block is located on the outer side of the needle cylinder, and when the third limiting block is in contact with the needle cylinder, the piston of the first piston push rod is just located above the lower opening of the needle cylinder. Based on the technical characteristics, further, a fourth limiting block is arranged on the second piston push rod and is positioned on the inner side of the needle cylinder, and when the fourth limiting block is in contact with the needle cylinder, the piston of the second piston push rod is just positioned above the lower opening of the needle cylinder. Based on the technical characteristics, preferably, the needle cylinder is made of transparent PVC material. Compared with the prior art, the application has the beneficial effects that: The application has simple structure, simple process of taking liquid by fixed volume, no space change, no need of pipette gun and suction head, etc. as a pipette, and no need of 'cap re