WO2022160372A1

WO2022160372A1 - Piston-type blood collector

Info

Publication number: WO2022160372A1
Application number: PCT/CN2021/075450
Authority: WO
Inventors: 郭健
Original assignee: 徐州宏阳医疗科技有限公司
Priority date: 2021-02-01
Filing date: 2021-02-05
Publication date: 2022-08-04
Also published as: CN112790773A

Abstract

A piston-type blood collector, comprising a blood collector body (1), wherein a first end (1-1) of the blood collector body is provided with a first rubber plug (2) through which a needle can be inserted; the blood collector body (1) is further provided with a second rubber plug (3), and when the inside of the blood collector body (1) is not under negative pressure, the second rubber plug (3) is slidably connected to the blood collector body (1) in a sealed manner; and when the inside of the blood collector body (1) is under negative pressure, a second end (1-2) of the blood collector body is further provided with a blocking mechanism, which is detachably connected to the blood collector body (1) and restricts the second rubber plug (3) from sliding towards the first end (1-1) of the blood collector body due to the pressure difference between the inside and outside of the blood collector body (1). The piston-type blood collector can realize repeated needle insertion and blood collection by means of a first rubber plug (2), and after blood collection, the blood is sealed within a relatively sealed space, such that secondary contamination is prevented, and the operation is simple.

Description

A piston blood sampler

technical field

The invention relates to the technical field of medical appliances, in particular to a piston-type blood sampler.

Background technique

In clinical collection of platelet rich (PRP), blood is usually collected with a syringe and then injected into a centrifuge tube. Since the centrifuge tube needs to be centrifuged several times to draw blood, the centrifuge tube must be opened multiple times, which has the risk of secondary pollution and is very inconvenient to operate. Therefore, The centrifuge tube needs to be improved.

SUMMARY OF THE INVENTION

In order to solve the problem in the prior art that the centrifuge tube needs to be opened after centrifugation and blood collection is easy to cause secondary pollution, the present invention proposes a piston-type blood sampler.

In order to realize above-mentioned technical purpose, the present invention adopts following technical scheme:

A piston type blood sampler, comprising a blood sampler body, a first rubber plug capable of penetrating a needle is arranged at the first end of the blood sampler body, and a second rubber plug is also arranged in the blood sampler body, when the inside of the blood sampler body is non-negative pressure When the lancet body is closed, the second rubber plug is sealed and slidingly connected with the lancet body; when the inside of the lancet body is under negative pressure, a blocking mechanism is also provided at the second end of the lancet body. The second rubber stopper slides toward the first end of the blood sampler body due to the pressure difference between the inside and outside of the blood sampler body.

Preferably, the blocking mechanism is a cap, the cap includes a top wall and a side wall, the side wall is provided with an internal thread, the second end of the blood sampler body is provided with an external thread matched with the internal thread, the inner side of the top wall is provided with an annular protrusion, the first The side of the second rubber plug close to the top wall is provided with an annular groove that cooperates with the annular protrusion. The second rubber plug on the outer side of the annular groove is an annular pressing part. The annular protrusion is inserted into the annular groove, and the annular compression The component is sleeved on the outer side of the annular protrusion, and the annular pressing component is pressed between the top wall and the second end of the blood sampler body to restrict the sliding of the second rubber plug.

Preferably, the cross-section of the annular protrusion is wedge-shaped.

Preferably, the annular protrusion stretches the annular pressing member apart, so that the diameter of the annular pressing member is larger than the cross-sectional diameter of the second end of the blood sampler body.

Compared with the prior art, the beneficial effects of the present invention:

The piston type blood sampler of the present invention regulates the pressure in the blood sampler body through the blocking mechanism, seals the blood in the blood sampler body after blood collection, and can achieve multiple blood draws after centrifugation through the first rubber stopper to prevent secondary pollution.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention or the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

Fig. 1 is the structural schematic diagram of piston type blood collection device during non-negative pressure;

Fig. 2 is the structural representation of piston type blood collection device during negative pressure;

Fig. 3 is an enlarged view of the local structure at A place in Fig. 2;

Figure 4 is a perspective view of a cap;

FIG. 5 is a perspective view of the second rubber stopper.

In the figure: 1, the body of the blood sampler; 1-1, the first end of the blood sampler body; 1-2, the second end of the blood sampler body; 2, the first rubber stopper; 3, the second rubber stopper; 3-1, the annular Groove; 3-2, annular pressing part; 4, cap; 4-1, top wall; 4-2, side wall; 4-3, annular protrusion; 5, internal thread; 6, external thread.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A piston type blood sampler, comprising a blood sampler body 1, a first rubber plug 2 capable of penetrating a needle is provided at a first end 1-1 of the blood sampler body, and the first rubber plug 2 is fixed with the first end 1-1 of the blood sampler body connect. The blood sampler body 1 is also provided with a second rubber plug 3. As shown in Figure 1, when the interior of the blood sampler body 1 is not under negative pressure, the second rubber plug 3 is tightly and slidably connected to the blood sampler body 1; as shown in Figure 2- As shown in FIG. 5, when the inside of the blood sampler body 1 is under negative pressure, the second end 1-2 of the blood sampler body is also provided with a blocking mechanism, the blocking mechanism is detachably connected to the blood sampler body 1, and the blocking mechanism restricts the second rubber plug 3 Due to the pressure difference between the inside and outside of the blood sampler body 1, it slides toward the first end 1-1 of the blood sampler body. The blocking mechanism is a cap 4. The cap 4 includes a top wall 4-1 and a side wall 4-2. An inner thread 5 is provided in the side wall 4-2. The outer thread 6, the inner side of the top wall 4-1 is provided with an annular protrusion 4-3, and the cross section of the annular protrusion 4-3 is wedge-shaped. The side of the second rubber plug 3 close to the top wall 4-1 is provided with an annular groove 3-1 that cooperates with the annular protrusion 4-3, and the second rubber plug 3 outside the annular groove 3-1 is annularly pressed The part 3-2, the annular pressing part 3-2 is a deformable soft structure. The annular protrusion 4-3 is inserted into the annular groove 3-1, the annular pressing member 3-2 is sleeved on the outside of the annular protrusion 4-3, and the annular protrusion 4-3 supports the annular pressing member 3-2 open, so that the diameter of the annular pressing member 3-2 is larger than the cross-sectional diameter of the second end 1-2 of the blood sampler body. The annular pressing member 3-2 is pressed between the top wall 4-1 and the second end 1-2 of the blood sampler body to restrict the sliding of the second rubber plug 3.

The negative pressure of the piston-type blood-collecting device of the present invention is divided into a blood-collecting stage and a blood-drawing stage after centrifugation. During the blood sampling stage, the lancet body 1 is under negative pressure, and the blocking mechanism restricts the second rubber plug 3 from sliding toward the first end 1-1 of the lancet body 1 due to the pressure difference between the inside and outside of the lancet body 1. Blood is collected by passing the needle through the first rubber stopper 2 . After the blood collection is completed, the blocking mechanism is released, and the second rubber plug 3 slides toward the first end 1-1 of the blood sampler body due to the pressure difference between the inside and outside of the blood sampler body 1 . Specifically, unscrew the cap 4 away from the first end 1-1 of the blood sampler body, release the pressing state between the annular pressing member 3-2 and the top wall 4-1, and the outside air enters the annular pressure The gap between the tightening member 3-2 and the top wall 4-1, the second rubber plug 3 is subjected to the action of the internal and external pressure difference, and the annular pressing member 3-2 is deformed under the action of the pressure, so that the annular pressing member 3 The diameter of -2 is smaller than the cross-sectional diameter of the lancet body 1 . The second rubber plug 3 slides toward the first end 1-1 of the blood sampler body until the air pressure inside and outside the blood sampler body 1 is balanced. Then, put the lancet body 1 into a sterile bag for the first high-speed centrifugation. After the first high-speed centrifugation, three layers are formed from the first end 1-1 of the lancet body to the second end 1-2 of the lancet body. : Red blood cell layer, platelet layer, serum layer. The dark red blood cell layer is extracted from the first rubber stopper 2 at the first end 1-1 of the blood sampler body. During the extraction process, the second rubber stopper 3 slides toward the first end 1-1 of the blood sampler body, keeping the blood sampler body at all times. 1 Internal and external air pressure balance. Then shake the blood sampler body 1 evenly, and perform the second high-speed centrifugation. After the second high-speed centrifugation, the platelets are concentrated on the first end 1-1 of the blood sampler body, and the first rubber stopper at the first end 1-1 of the blood sampler body is collected. 2. Thread the needle to extract platelets. During the extraction process, the second rubber stopper 3 slides toward the first end 1-1 of the blood-collecting device body to keep the air pressure inside and outside the blood-collecting device body 1 balanced. After the drawing is completed, the rest of the blood sample in the lancet body 1 is discarded.

When the piston-type blood sampler of the present invention is used in non-negative pressure, the second rubber plug 3 is tightly and slidably connected to the blood sampler body 1 , and blood is injected through the first rubber plug 2 .

Claims

A piston-type blood sampler, comprising a blood sampler body (1), a first rubber plug (2) capable of penetrating a needle is provided at a first end (1-1) of the blood sampler body, and characterized in that: the blood sampler body (1) There is also a second rubber stopper (3) inside,

When the inside of the blood sampler body (1) is non-negative pressure, the second rubber plug (3) is tightly and slidably connected to the blood sampler body (1);

When the inside of the blood sampler body (1) is under negative pressure, the second end (1-2) of the blood sampler body is further provided with a blocking mechanism, the blocking mechanism is detachably connected to the blood sampler body (1), and the blocking mechanism restricts The second rubber plug (3) slides toward the first end (1-1) of the blood sampler body due to the pressure difference between the inside and outside of the blood sampler body (1).
The piston-type blood sampler according to claim 1, characterized in that: the blocking mechanism is a cap (4), and the cap (4) comprises a top wall (4-1) and a side wall (4-2), so The side wall (4-2) is provided with an inner thread (5), the second end (1-2) of the blood sampler body is provided with an outer thread (6) matched with the inner thread (5), and the top wall (4-1) An annular protrusion (4-3) is provided on the inner side, and a side of the second rubber plug (3) close to the top wall (4-1) is provided with a The annular groove (3-1), the second rubber plug (3) outside the annular groove (3-1) is an annular pressing member (3-2), and the annular protrusion (4-3) is inserted into the annular groove (3-1) In the groove (3-1), the annular pressing member (3-2) is sleeved on the outside of the annular protrusion (4-3), and the annular pressing member (3-2) is pressed against the top The sliding of the second rubber stopper (3) is restricted between the wall (4-1) and the second end (1-2) of the blood sampler body.
The piston-type blood sampler according to claim 2, characterized in that: the cross section of the annular protrusion (4-3) is wedge-shaped.
The piston-type blood sampler according to claim 2, characterized in that: the annular protrusion (4-3) stretches the annular pressing member (3-2), so that the annular pressing member (3-2) is opened. The diameter of -2) is larger than the cross-sectional diameter of the second end (1-2) of the lancet body.