CN102232834A - Disposable automatic blood sampling device - Google Patents

Abstract

The present invention relates to the technical field of medical devices, in particular to a disposable automatic blood collection device, which includes a front needle, a front needle holder, a transparent hose, a rear needle holder, a rear needle, and a vacuum test tube connected in sequence. The front needle sleeve is sleeved on the front needle with a gap and detachably sleeved on the front needle holder, the rear needle sleeve is tightly sleeved on the rear needle, and the rear needle sleeve includes shrinkable and deformable rubber combined in sequence The front section of the casing of the hose, the middle section of the casing of the hard plastic tube, and the rear section of the casing of the shrinkable and deformable rubber hose with the tail end closed. There is a needle tube through hole on the top, and the sleeve through hole is located at the rear end of the needle tube through hole. By adopting the technical solution of the present invention, the disadvantages of the safety of the inspected personnel and the pollution caused by the blood flowing out of the blood collection device are solved, and a unified vacuum can be used. Test tube technical problems, to ensure that the coagulation or blood volume of the blood sample in the test tube meets the collection standard range.

Description

Disposable automatic blood collection device

technical field

The invention relates to the technical field of medical instruments, in particular to a disposable automatic blood collection device.

Background technique

At present, the used blood taking device of most hospitals, such as the rigid disposable automatic blood taking device disclosed by the Chinese patent document CN2186545Y with the publication number, during use, first the front needle is inserted into the vein of the inspected person, and the front needle is fixed. , and then move the vacuum test tube to the back needle, so that the back needle penetrates the sealing rubber plug of the vacuum test tube and penetrates into the test tube, but because the front needle and the rear needle of this automatic blood collection device are rigidly connected During use, especially when the vacuum test tube is moved backward so that the rear needle penetrates the sealing rubber plug of the vacuum test tube and penetrates into the test tube, the front needle is likely to be moved, resulting in a "needle running" phenomenon, which may cause the needle to be removed. The safety of blood personnel brings hidden dangers. At the same time, when the operation of the rear acupuncture through the sealing rubber stopper and deep into the test tube is too slow, the blood will flow out of the blood taking device, causing the disadvantage of pollution.

In order to solve the above problems, some hospitals have changed the structure of the rigid connection between the front needle and the rear needle, fixed the front needle on the front needle seat, fixed the rear needle on the rear needle seat, and adopted a flexible transparent soft joint between the front and rear needle seats. Tube connection to form a flexible disposable automatic blood collection device, that is, the flexible disposable automatic blood collection device includes a front needle, a front needle holder, a transparent hose, a rear needle holder, a rear needle, and a vacuum test tube, and the front needle is fixedly connected to the The front section of the front needle seat, the rear section of the front needle seat is connected to the front end of the transparent hose, the rear end of the transparent hose is connected to the front section of the rear needle seat, the rear section of the rear needle seat is fixedly connected to the rear needle, and the front needle sleeve is sleeved on the front needle , detachable and fixed on the front needle seat, and the rear needle sleeve is tightly set on the rear needle and fixed on the rear needle seat. The disposable automatic blood collection device with such a structure can reduce the chance of contamination and ensure that it is not easy to run away during blood collection. Needle. Among them, the transparent hose in the middle is convenient to observe the blood flow on the one hand, and on the other hand, the flexible connection of the hose is also conducive to the step-by-step independent operability of the front needle and the rear needle; the vacuum test tube is sealed with a sealed rubber plug and has a fixed negative pressure , and anticoagulants for various purposes are placed in advance, so that the venous blood can be mixed with the anticoagulants after entering the test tube. When in use, after the front needle cannula is removed, the front needle is inserted into the subject's venous blood vessel, and the rear needle is pierced through the sealed rear needle cannula, and then the sealing rubber stopper is pierced and inserted into the test tube. In this way, The blood just can enter the test tube automatically.

The flexible disposable automatic blood collection device with this structure is connected by a flexible transparent hose in the middle, although it can solve the above-mentioned "running needle" phenomenon, it solves the safety of the inspected personnel and the blood flowing out of the blood collection device, causing pollution However, this flexible disposable automatic blood collection device has a certain air pressure in the transparent tube when it is used because the rear needle sleeve is sealed on the rear needle, and the negative pressure in the vacuum test tube is fixed. , This will cause blood sample coagulation or insufficient blood collection in the test tube, resulting in inaccurate test results, which will directly affect clinical treatment, delay time, cause pain and loss to patients, and easily cause nurse-patient disputes.

If the airtight rear needle sleeve is canceled, the air pressure problem in the sealed transparent hose can be solved, but it is easy to cause the blood to flow out of the blood collection device when the operation of piercing the rear needle through the sealing rubber stopper and deep into the test tube is too slow, causing pollution , and it is easy to stab the hands of the examining doctor, which cannot protect the safety of the operator.

If different negative pressure vacuum test tubes are used to eliminate the air pressure in the transparent hose, so that the blood volume entering the test tube meets the collection standard, then it is necessary to set up different negative pressure vacuum test tubes, and different negative pressures have different effects on the blood pressure in the test tube. Fixed anticoagulants will have different effects, and the vacuum test tubes of the "rigid disposable automatic blood collection device" and "flexible disposable automatic blood collection device" used by different hospitals cannot be unified, and the supply to the hospital business cause difficulties.

Contents of the invention

The technical problem to be solved by the present invention is to provide a novel disposable automatic blood-taking device, which solves the blood-taking device that can flexibly connect the front and rear needles, solves the safety of the inspected personnel and the blood flowing out of the blood-taking device, causing The disadvantages of pollution, and the technical problem of using a unified vacuum test tube (unified negative pressure, containing a unified fixed anticoagulant) to ensure that the coagulation or blood volume of the blood sample entering the test tube meets the collection standard range.

In order to solve the above technical problems, the disposable automatic blood collection device provided by the present invention includes a front needle sleeve, a front needle, a front needle holder, a transparent hose, a rear needle holder, a rear needle, a rear needle sleeve, a vacuum Test tube, the front needle is fixedly connected to the front section of the front needle holder, the rear section of the front needle holder is connected to the front section of the transparent hose, the rear section of the transparent hose is connected to the front section of the rear needle holder, and the rear section of the rear needle holder is fixedly connected to the rear Needle, the front needle sleeve is sleeved on the front needle with gaps and detachably sleeved on the front needle holder, the rear needle sleeve is airtightly sleeved on the rear needle, and the rear needle sleeve includes front ends that are sequentially combined Sleeved on the rear needle holder, the front section of the casing adopts a shrinkable and deformable rubber hose, the middle section of the casing of a hard plastic tube, and the rear section of the casing adopts a shrinkable and deformable rubber hose with the tail end closed. , the middle section of the cannula is provided with a cannula through hole communicating with the outside atmosphere, the rear needle tube wall is provided with a needle tube through hole communicating with the inner cavity of the rear needle tube, and the sleeve through hole is located at the rear end of the needle through hole.

Since the rear needle sleeve is sleeved on the rear needle holder by sequentially combining the front end, the front section of the sleeve of the shrinkable rubber hose, the middle section of the sleeve of the hard plastic tube, and the closed tail end are made of shrinkable and deformable rubber. The compositional structure of the rear section of the casing of the hose, wherein the middle section of the casing is provided with a casing through hole communicating with the outside atmosphere, and the rear needle wall is provided with a needle through hole communicating with the inner cavity of the rear needle tube. The sleeve through hole is located at the rear end of the needle tube through hole. When the front needle has been inserted into the vein of the examinee, the entire rear needle sleeve is sealed, and under the action of the internal pressure of the human body, the blood will flow into the transparent hose, compressing the air in the transparent hose, making the airtight The rear needle sleeve is filled with air, and then the rear needle pierces the closed tail end of the rear section of the rear needle sleeve, and when piercing the sealing rubber plug, the rear section of the sleeve sleeve of the shrinkable and deformable rubber hose is protected by the sealing rubber. The stopper will shrink and deform and push the middle section of the cannula, which is provided with a cannula through hole communicating with the outside atmosphere on the tube wall, to move forward. The through holes of the needle tube are connected to each other, and the gas that originally existed in the closed rear needle sleeve will be released through the connection with the outside air, eliminating the original air pressure. When the rear needle continues to move backwards and penetrates into the vacuum test tube, at this time , the through hole of the rear needle sleeve has been moved to the front end of the through hole of the rear needle tube, and the entire rear needle sleeve is sealed again, and the blood flows smoothly into the vacuum test tube.

Further, the shape of the through hole of the rear needle tube and the through hole of the cannula is defined as a strip hole perpendicular to the axial direction of the needle. This shape of the through hole is conducive to the shrinkage and deformation of the rear needle sleeve. The through hole of the rear needle sleeve and the through hole of the rear needle tube are staggered from each other, so as to better ensure the effect.

Further, in order to ensure the cooperation between the rear needle holder and the rear needle sleeve, it is defined that the rear section of the rear needle holder is provided with an anti-retraction boss and an anti-falling boss that cooperate with the rear section of the sleeve.

Further, in order to facilitate the puncturing of the front needle, it is defined that the front needle fixing seat is provided with a handle.

Further, it is defined that this disposable automatic blood collection device also includes a convex-shaped test tube sleeve that cooperates with the vacuum test tube. OD clearance fit. The addition of a convex test tube casing can better protect the operating medical staff from being stabbed, and is also beneficial to control the flow of blood out of the blood collection device during operation and cause pollution.

Furthermore, in order to better observe the blood in the blood collection device, the test tube casing is limited to be made of transparent plastic or provided with an observation hole.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a disposable automatic blood collection device of the present invention;

Fig. 2 is a schematic diagram of the use state of the device shown in Fig. 1 when it is inserted into the vacuum test tube rubber plug and not yet inserted into the vacuum test tube cavity;

Fig. 3 is a schematic diagram of the use state of the device shown in Fig. 1 when it is inserted into the vacuum test tube cavity.

Detailed ways

Below in conjunction with accompanying drawing and technical scheme of the present invention are further described:

As shown in Figure 1, the disposable automatic blood collection device provided by the technical solution of the present invention includes a front needle sleeve 1, a front needle 2, a front needle holder 3, a transparent hose 4, a rear needle holder 5, a rear needle 71. The rear needle sleeve 6, the vacuum test tube 9, the front needle 2 is fixedly connected to the front section of the front needle holder 3, the rear section of the front needle holder 3 is connected to the front section of the transparent hose 4, and the rear section of the transparent hose 4 is connected to the rear needle The front section of the holder 5 and the rear section of the rear needle holder 5 are fixedly connected to the rear needle 71, and the front needle sleeve 1 is sleeved on the front needle 2 with a gap and detachably sleeved on the front needle holder 3. The sleeve 6 is hermetically placed on the rear needle 71, wherein the rear needle sleeve 6 includes a sequentially combined front end sleeved on the rear needle holder 5, and the rear needle sleeve is made of shrinkable and deformable rubber hose material The front section 61, the middle section 63 of the back needle sleeve made of hard plastic tube, the rear section 64 of the sleeve tube made of the rubber hose material which can shrink and deform with the closed tail end, are provided with the tube wall of the middle section 63 of the back needle sleeve The back needle sleeve through hole 62 communicating with the outside atmosphere, the back needle tube wall is provided with the back needle tube through hole 72 communicating with the inner cavity of the back needle 71 tube, the back needle sleeve through hole 62 is located behind the back needle tube through hole 72 end, the rear needle tube through hole 72 and the rear needle sleeve through hole 62 are all in the shape of a bar hole perpendicular to the axial direction of the needle head. The boss 51 and the anti-off boss 52, and the front needle holder 3 is provided with a handle 10, and a convex test tube sleeve 8 made of transparent plastic that cooperates with the vacuum test tube 9 is also provided. Type test tube sleeve pipe 8 upper ends are fixed on the back needle holder 3, and the inner diameter of the lower end opening of the convex font test tube sleeve pipe 8 is matched with the outer diameter clearance of vacuum test tube 9.

During use, it is divided into three steps. The first step is to remove the front needle sleeve 1 at the front end of the disposable automatic blood collection device as shown in Figure 1, and use the handle 10 to conveniently pierce the front needle 2 into the person under examination. At this time, since the rear needle sleeve 6 is in a sealed state, under the action of the internal pressure of the human body, the blood will flow into the automatic blood collection device, and the air in the transparent hose 4 will be compressed to make the airtight rear needle sleeve The tube 6 is filled with air; in the second step, using the positioning of the test tube sleeve 8, the vacuum test tube 9 is positioned and inserted into the test tube sleeve 8, and then the rear needle 71 is pierced through the rear section 64 of the sleeve of the rear needle sleeve The closed tail end pierces the sealed vacuum test tube rubber stopper 91, but the rear needle 71 does not penetrate the cavity of the vacuum test tube 9. At this time, the rear needle sleeve made of shrinkable and deformable rubber hose material Section 64 is hindered by the vacuum test tube rubber stopper 91 to produce shrinkage deformation and push the rear needle sleeve middle section 63 connected with the rear needle sleeve rear section 64 to move forward. The back needle sleeve through hole 62 communicating with the atmosphere, the needle tube through hole 72 communicating with the back needle 71 tube lumen is also arranged on the tube wall of the back needle 71, and the back needle sleeve through hole 62 is located at the rear end of the back needle tube through hole 72 , in the process of piercing into the sealed vacuum test tube rubber stopper 91, the back needle sleeve through hole 62 will be connected with the back needle tube through hole 72 to reach the state shown in Figure 2, so that the previously sealed back needle The gas in the casing 6 will be released by conducting with the outside air, eliminating the original air pressure; in the third step, the rear needle 71 continues to move backward, piercing the sealed vacuum test tube rubber stopper 91, and piercing the vacuum The cavity of test tube 9, at this moment, the rear needle sleeve rear section 64 that the rubber hose material that can shrink deformation is made continues to deform and drives the rear needle sleeve middle section 63 to move forward, when the rear needle sleeve through hole 62 moves to the rear When the front end of the needle tube through hole 72 is reached, the whole rear needle sleeve is sealed again, reaching the state as shown in Figure 3. At this time, the blood smoothly flows into the vacuum test tube. After the sampling is completed, the test tube 9 is pulled out, and the vacuum test tube rubber stopper 91 Utilizing its elasticity, the puncture hole can be sealed automatically, and the test tube 9 can be used for analysis and testing, which can prevent changes in blood components and external pollution, reduce inspection errors, and reduce the number of disinfection pieces. It reduces the chance of contamination, is convenient to operate, and simplifies the blood collection procedure.

It should be noted that for the test tube sleeve 8, transparent plastic material or other materials that can be observed can also be used, and observation holes can also be set on the opaque material. The purpose of doing this is to facilitate the observation of blood. At the same time, It can ensure the convenient operation and safety of medical staff. The present invention also has multiple implementations, which will not be described in detail here. For those skilled in the art, under the premise of not departing from the structure of the present invention, some deformations and improvements can also be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect and patent of the present invention. practicality.

Claims (7)

1. disposable automatic blood sampler, include preceding needle cannula, preceding pin, preceding pin holder, transparent hose, back pin holder, back pin, back needle cannula, vacuum test tube, the preceding fixedly connected pro-pin of pin holder leading portion, preceding pin holder back segment connects the leading portion of transparent hose, the back segment of transparent hose connects the leading portion of back pin holder, the fixedly connected back of the back segment of back pin holder pin, also dismountable being socketed on the preceding pin holder on the preceding gapped cover pro-of the needle cannula pin, what back needle cannula was airtight is enclosed within on the pin of back, it is characterized in that: described back needle cannula comprises that bonded successively front end sleeve is connected on the pin holder of back, adopt the sleeve pipe leading portion of the rubber hose of collapsible distortion, the sleeve pipe stage casing of plastic conduit, the sleeve pipe back segment of the rubber hose of the collapsible distortion of employing of tail end sealing, wherein, sleeve pipe stage casing tube wall is provided with the cover pipe through-hole that is communicated with ambient atmosphere, back needle tubing wall is provided with the needle tubing through hole that is communicated with the back syringe intracavity, and the cover pipe through-hole is positioned at the rear end of needle tubing through hole.

2. disposable automatic blood sampler according to claim 1 is characterized in that: described back needle tubing through hole is for poroid perpendicular to the bar of needle axis direction.

3. disposable automatic blood sampler according to claim 1 is characterized in that: described back needle cannula through hole is for poroid along the bar of casing axis direction.

4. disposable automatic blood sampler according to claim 1 is characterized in that: the back segment of described back pin holder is provided with retaining boss and the anticreep boss that cooperates with the sleeve pipe back segment.

5. disposable automatic blood sampler according to claim 1 is characterized in that: the pin holder is provided with hand holding handle before described.

6. disposable automatic blood sampler according to claim 1, it is characterized in that: also include the test tube sleeve pipe that cooperatively interacts with vacuum test tube, the test tube sleeve pipe becomes " protruding " font, convex test tube sleeve pipe upper end is fixed on the pin holder of back, and the internal diameter of lower ending opening cooperates with the crest clearance of vacuum test tube.

7. disposable automatic blood sampler according to claim 6 is characterized in that: described test tube sleeve pipe adopts transparent plastic to make or be provided with observation port.

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