CN114451892A

CN114451892A - Blood draw-out device for medical examination

Info

Publication number: CN114451892A
Application number: CN202210387654.9A
Authority: CN
Inventors: 陈谨; 杨凯; 潘颖; 王雅洁; 田平平; 刘静怡; 马子阳
Original assignee: Anhui Medical College
Current assignee: Anhui Medical College
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-05-10
Anticipated expiration: 2042-04-14
Also published as: CN114451892B

Abstract

The invention relates to the technical field of medical examination, in particular to a blood drawing device for medical examination, which comprises a drainage tube, a needle tube and a connecting device, wherein the connecting device is connected to the drainage tube and the needle tube so as to discharge air in the drainage tube and the needle tube, the drainage tube is connected with a blood sampling tube when blood sampling is carried out, the needle tube is used for sampling blood, and the air in the drainage tube and the needle tube can be discharged through the connecting device before blood sampling, so that impurities in air are prevented from polluting a blood sampling sample and infecting a blood sampler.

Description

Blood draw-out device for medical examination

Technical Field

The invention relates to the technical field of medical examination, in particular to a blood drawing device for medical examination.

Background

Venous blood collection is the most common blood collection means in hospitals for routine examinations, and is a method of collecting a certain amount of venous blood through a blood collection needle and performing medical examinations on the blood sample. The disposable blood taking needle is used for venous blood taking, the disposable blood taking needle is formed by integrating a venous needle and a front end needle base with a rear end needle base and a blood taking needle through a hose, the venous needle penetrates into a vein, the blood taking needle is inserted into a negative pressure blood taking tube, and a blood sample enters the negative pressure blood taking tube under the action of the negative pressure blood taking tube.

For preventing that the blood taking needle from receiving the impurity pollution in the air, the blood taking needle adopts sealed package usually, just can open when using, however, at the blood taking in-process, the extranal packing of blood taking needle will be opened, the blood sampling personnel need hold the syringe needle on one side, look for the vein on one side, only comparatively proficient blood sampling personnel use time less, to some novice nurses, can spend more time, at this in-process, the inside can take place to communicate with the outside air of blood taking needle, lead to the inside air of blood taking needle to be contaminated, can lead to the fact the pollution to it when blood flows through, and then cause the inspection result error great.

Disclosure of Invention

The invention aims to solve the defect that air inside a blood taking needle is polluted in the prior art, and provides a blood drawing device for medical examination.

In order to achieve the purpose, the invention adopts the following technical scheme:

the blood extracting device for medical examination comprises a drainage tube, a needle tube and a connecting device, wherein the connecting device is connected to the drainage tube and the needle tube so as to discharge air in the drainage tube and the needle tube.

The connecting device comprises a shell and a corrugated pipe, the drainage pipe and the needle tube are fixedly connected to the shell, one end of the corrugated pipe is fixedly connected to the needle tube, the other end of the corrugated pipe is fixedly connected to a sliding sleeve, the shell is fixedly connected to a sliding pipe, one end of the sliding pipe is communicated with the drainage pipe, and the other end of the sliding pipe is slidably matched in the sliding sleeve;

the rigid coupling has the hose in the bellows, hose one end with the sliding sleeve intercommunication, the other end with the needle tubing intercommunication to make and form one between hose outer wall and the bellows inner wall and hold the chamber, it fills into nitrogen gas to hold the intracavity, be equipped with the check valve on the bellows terminal surface, be equipped with pressure release structure on the hose, so that the nitrogen gas that holds the chamber gets into inside the hose.

Further, the pressure relief structure includes a valve plate and extension spring, first exhaust hole has been seted up on the valve plate, recess has been seted up on the hose, the recess with hold the chamber intercommunication, the second exhaust hole has been seted up on the recess to make the recess with the inside intercommunication of hose, the valve plate slidable cooperation is in the recess, extension spring one end rigid coupling is in the valve plate, the other end rigid coupling is in on the recess inner wall.

Furthermore, a return spring is sleeved on the hose.

Further, a hemostasis structure is arranged on the shell to perform hemostasis.

Further, the hemostatic structure comprises an annular gasket made of deformable materials, the gasket is slidably sleeved on the needle tube, an annular elastic adhesive tape is fixedly connected to the gasket, a plurality of ejecting blocks are fixedly connected to the outer edge of the elastic adhesive tape, through holes are formed in the ejecting blocks, a rope connected end to end is inserted in the through holes, a plurality of openings are formed in the gasket, a sliding block is slidably matched in the openings, a wedge-shaped first clamping block is fixedly connected in each opening, a wedge-shaped second clamping block is fixedly connected to each sliding block, the first clamping block is matched with the second clamping block, a sleeve is fixedly connected to each sliding block, the sleeve is sleeved on the rope, the sliding block is fixedly connected to the connecting piece, a connecting rod is fixedly connected to the connecting piece, a notch is formed in the connecting rod, and a compression spring is fixedly connected to the inner wall of the shell, the compression spring is fixedly connected with a cutter head which is matched with the surface of the connecting rod in a sliding way.

Furthermore, a first driving structure is arranged in the shell to drive the sliding block to slide in the opening.

Further, first drive structure includes movable rod and first spring, movable rod one end rigid coupling is in on the sliding sleeve, the mounting groove has been seted up to the other end, it has the pawl to articulate in the mounting groove, first spring one end rigid coupling is in on the mounting groove inner wall, the other end rigid coupling is in on the pawl, the rigid coupling has wedge-shaped third chuck on the connecting rod, the pawl with the third chuck cooperatees.

Furthermore, a second driving structure is arranged on the shell to drive the movable rod to move along the axial direction of the needle tube.

Further, the second driving structure comprises a wedge-shaped button and a wedge-shaped stop block, a button hole is formed in the shell, the button is slidably matched in the button hole, the stop block is fixedly connected to the movable rod, and the inclined plane of the button abuts against the inclined plane of the stop block.

The invention provides a blood drawing device for medical examination, which has the beneficial effects that: when blood sampling is carried out, the drainage tube is connected with the blood sampling tube, the needle tube is used for sampling blood, and before blood sampling, air in the drainage tube and the needle tube can be discharged through the connecting device, so that the blood sampling sample is prevented from being polluted by impurities in the air, and a blood sampler is prevented from being infected.

Drawings

Fig. 1 is a schematic structural diagram of a blood drawing device for medical examination according to the present invention.

Fig. 2 is a top view of a blood drawing device for medical examination according to the present invention.

Fig. 3 is a sectional view taken along the line a-a of a blood drawing device for medical examination according to the present invention.

Fig. 4 is an enlarged view of the blood drawing device for medical examination at B according to the present invention.

Fig. 5 is an enlarged view of the blood drawing device for medical examination at D according to the present invention.

Fig. 6 is an enlarged view of the blood drawing device for medical examination at the point C.

Fig. 7 is a schematic structural diagram of a housing of a blood drawing device for medical examination according to the present invention.

Fig. 8 is a schematic structural diagram of a bellows of a blood drawing device for medical examination according to the present invention.

Fig. 9 is a schematic structural view of a connecting rod of a blood drawing device for medical examination according to the present invention.

Fig. 10 is a schematic structural view of an elastic tape of a blood drawing device for medical examination according to the present invention.

Fig. 11 is a schematic structural diagram of a slider of a blood drawing device for medical examination according to the present invention.

Fig. 12 is a schematic structural diagram of a top block of a blood drawing device for medical examination according to the present invention.

Fig. 13 is an enlarged view of the blood drawing device for medical examination at E in accordance with the present invention.

Fig. 14 is a schematic structural diagram of a housing of a blood drawing device for medical examination according to the present invention.

Description of the drawings:

1. a drainage tube; 2. a needle tube; 3. a housing; 301. a button hole; 4. a slide pipe; 5. a sliding sleeve; 6. a bellows; 601. a one-way valve; 7. a hose; 8. a groove; 9. a second vent hole; 10. a valve plate; 11. a first exhaust port; 12. a tension spring; 13. a return spring; 14. a compression spring; 15. a cutter head; 16. a connecting rod; 161. a third fixture block; 17. a notch; 18. a movable rod; 19. mounting grooves; 20. a pawl; 21. a first spring; 22. a gasket; 23. a top block; 24. an elastic tape; 25. a connecting member; 26. a slider; 27. a second fixture block; 28. a first clamping block; 29. a sleeve; 30. a rope; 31. opening a hole; 32. a button; 33. a stopper; .

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

Referring to fig. 1 to 3, a blood drawing device for medical examination includes a drainage tube 1, a needle tube 2 and a connecting device connected to the drainage tube 1 and the needle tube 2 to discharge air in the drainage tube 1 and the needle tube 2. When blood sampling is carried out, the drainage tube 1 is connected with a blood sampling tube, the needle tube 2 is used for sampling blood, and before blood sampling, air in the drainage tube 1 and the needle tube 2 can be discharged through the connecting device, so that the blood sampling sample is prevented from being polluted by impurities in the air and a blood sampler is prevented from being infected.

Example 2

Further, on the basis of the above embodiments, as shown in fig. 2-8, the connection device of the present embodiment includes a housing 3 and a bellows 6, the drainage tube 1 and the needle tube 2 are both fixedly connected to the housing 3, one end of the bellows 6 is fixedly connected to the needle tube 2, the other end is fixedly connected to a sliding sleeve 5, the housing 3 is fixedly connected to a sliding tube 4, one end of the sliding tube 4 is communicated with the drainage tube 1, and the other end is slidably fitted in the sliding sleeve 5;

the bellows 6 is internally and fixedly connected with a hose 7, one end of the hose is communicated with the sliding sleeve 5, and the other end of the hose is communicated with the needle tube 2, so that a containing cavity is formed between the outer wall of the hose 7 and the inner wall of the bellows 6, nitrogen is filled in the containing cavity, the end face of the bellows 6 is provided with a one-way valve 601, and the hose 7 is provided with a pressure relief structure, so that the nitrogen in the containing cavity enters the inside of the hose 7.

Pressure release structure includes a valve plate 10 and extension spring 12, has seted up first exhaust hole 11 on the valve plate 10, has seted up recess 8 on the hose 7, recess 8 with hold the chamber intercommunication, has seted up second exhaust hole 9 on the recess 8 to make recess 8 and the inside intercommunication of hose 7, valve plate 10 slidable cooperation is in recess 8, extension spring 12 one end rigid coupling is at valve plate 10, and other end rigid coupling is on the recess 8 inner wall, and the cover is equipped with reset spring 13 on the hose 7.

The driving sliding sleeve 5 slides on the sliding pipe 4, the corrugated pipe 6 and the return spring 13 can be compressed in the moving process of the sliding sleeve 5, and the pressure in the containing cavity can be increased after the corrugated pipe 6 is pressed.

As shown in figure 6, under the action of pressure, the valve plate 10 can move to the left in the groove 8, the valve plate 10 moves to the left in the process, the first exhaust hole 11 on the valve plate 10 can coincide with the second exhaust hole 9 at a certain moment, the first exhaust hole 11 and the second exhaust hole 9 coincide and then contain nitrogen in the cavity and then enter the hose 7, the hose 7 is communicated with the drainage tube 1 and the needle tube 2, the nitrogen can be discharged through the drainage tube 1 and the needle tube 2, and in the nitrogen discharging process, air in the drainage tube 1 and the needle tube 2 can be extruded out, so that the sampling of impurity pollution in the air can be prevented.

Example 3

Further, on the basis of embodiment 1 or 2, in this embodiment, a hemostatic structure is disposed on the housing 3, as shown in fig. 3-14, the hemostatic structure includes an annular gasket 22, the gasket 22 is made of a deformable material, the gasket 22 is slidably disposed on the needle tube 2, an annular elastic adhesive tape 24 is fixedly connected to the gasket 22, a plurality of top blocks 23 are fixedly connected to an outer edge of the elastic adhesive tape 24, through holes are formed in the top blocks 23, a rope 30 connected end to end is inserted into the through holes, the gasket 22 is provided with a plurality of openings 31, a sliding block 26 is slidably engaged in the openings 31, a first wedge-shaped fixture block 28 is fixedly connected to the opening 31, a second wedge-shaped fixture block 27 is fixedly connected to the sliding block 26, a sleeve 29 is fixedly connected to the sliding block 26, the sleeve 29 is disposed on the rope 30, the sliding block 26 is fixedly connected to the connecting member 25, a connecting rod 16 is fixedly connected to the connecting member 25, the connecting rod 16 is provided with a notch 17, the inner wall of the shell 3 is fixedly connected with a compression spring 14, the compression spring 14 is fixedly connected with a cutter head 15, and the cutter head 15 is matched with the surface of the connecting rod 16 in a sliding way.

Be equipped with first drive structure in casing 3 and slide in trompil 31 with drive slider 26, first drive structure includes movable rod 18 and first spring 21, movable rod 18 one end rigid coupling is on sliding sleeve 5, mounting groove 19 has been seted up to the other end, it has pawl 20 to articulate in the mounting groove 19, first spring 21 one end rigid coupling is on mounting groove 19 inner wall, the other end rigid coupling is on pawl 20, the rigid coupling has wedge-shaped third chuck 161 on connecting rod 16, pawl 20 cooperatees with third chuck 161.

Be equipped with the second drive structure on casing 3 and follow needle 2 axial displacement with drive movable rod 18, the second drive structure includes wedge-shaped button 32 and wedge-shaped dog 33, has seted up button hole 301 on the casing 3, and button 32 slidable cooperation is in button hole 301, and dog 33 rigid coupling is on movable rod 18, and the inclined plane of button 32 supports and leans on the inclined plane of dog 33.

As shown in fig. 4, when pressure is applied to the button 32, the button 32 approaches the bellows 6, the stopper 33 receives the pressure applied by the button 32, the stopper 33 is forced to move upward, the stopper 33 moves upward to drive the movable rod 18 to move upward, the movable rod 18 moves upward to drive the sliding sleeve 5 to slide on the sliding tube 4 and also drive the pawl 20 to move upward, and the pawl 20 does not drive the connecting rod 16 to move during the upward movement.

When the pressure applied to the button 32 is removed, the movable rod 18 is reset under the elastic force of the corrugated pipe 6 and the reset spring 13, during the resetting process of the movable rod 18, the pawl 20 drives the connecting rod 16 to move downwards, the connecting rod 16 moves downwards to drive the sliding block 26 to move downwards in the opening 31, the sliding block 26 moves downwards to drive the sleeve 29 to move downwards, the sleeve 29 moves downwards to drive the rope 30, the rope 30 drives the top blocks 23 to approach each other, and the top blocks 23 approach each other to contract the elastic adhesive tape 24 due to the connection of the top blocks 23 and the elastic adhesive tape 24.

The working principle is as follows:

when the device is used, firstly, the drainage tube 1 is connected with the blood collection tube, then the button 32 is pressed, then the needle tube 2 is punctured into the human body for blood collection, the elastic adhesive tape 24 is adhered to the skin, and the needle eye is positioned in the elastic adhesive tape 24.

The button 32 is close to the corrugated pipe 6 after being stressed, the stop 33 is stressed by the pressure given by the button 32, the stop 33 moves upwards after being stressed, the stop 33 moves upwards to drive the movable rod 18 to move upwards, the movable rod 18 moves upwards to drive the sliding sleeve 5 to slide on the sliding pipe 4 and drive the pawl 20 to move upwards, and the pawl 20 cannot drive the connecting rod 16 to move in the moving process.

The bellows 6 and the return spring 13 are compressed in the moving process of the sliding sleeve 5, and the pressure in the accommodating cavity is increased after the bellows 6 is compressed.

After blood collection is completed, pressure applied to the button 32 is removed, the movable rod 18 is reset under the elastic force action of the corrugated pipe 6 and the reset spring 13, the pawl 20 drives the connecting rod 16 to move downwards in the reset process of the movable rod 18, the connecting rod 16 moves downwards to drive the sliding block 26 to move downwards in the opening 31, the sliding block 26 moves downwards to drive the sleeve 29 to move downwards, the sleeve 29 moves downwards to drive the rope 30, the rope 30 enables the top blocks 23 to be close to each other, the top blocks 23 are connected with the elastic adhesive tape 24, the elastic adhesive tape 24 contracts due to the mutual close of the top blocks 23, and the needle eye is located in the elastic adhesive tape 24, so that the elastic adhesive tape 24 extrudes skin tissue near the needle eye during contraction, and the skin tissue contracts towards the needle eye to stop bleeding.

In the moving process of the connecting rod 16, at a certain moment, the cutter head 15 enters the notch 17, and under the elastic force of the compression spring 14, the cutter head 15 cuts off the connecting rod 16 at the notch 17, as shown in fig. 13, after the connecting rod 16 is cut off, the slide block 26 does not reset due to the mutual limiting function between the first block 28 and the second block 27, so the elastic adhesive tape 24 is continuously kept in the contraction state to stop bleeding at the needle eye.

Compared with the traditional method for stopping bleeding by extruding the alcohol cotton to the needle hole, the method for stopping bleeding provided by the invention is more convenient and faster, a blood collector does not need to use the alcohol cotton manually, and the blood collector does not need to keep an embarrassed hemostasis posture after blood collection when the blood collection part is more private (such as blood collection at the hip, blood collection at the inner side of thighs and the like).

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A blood drawing device for medical examination is characterized by comprising a drainage tube (1), a needle tube (2) and a connecting device, wherein the connecting device is connected to the drainage tube (1) and the needle tube (2) to discharge air in the drainage tube (1) and the needle tube (2);

the connecting device comprises a shell (3) and a corrugated pipe (6), the drainage pipe (1) and the needle tube (2) are fixedly connected to the shell (3), one end of the corrugated pipe (6) is fixedly connected to the needle tube (2), the other end of the corrugated pipe is fixedly connected to a sliding sleeve (5), the shell (3) is fixedly connected to a sliding pipe (4), one end of the sliding pipe (4) is communicated with the drainage pipe (1), and the other end of the sliding pipe is slidably matched in the sliding sleeve (5);

bellows (6) interior rigid coupling has hose (7), hose one end with sliding sleeve (5) intercommunication, the other end with needle tubing (2) intercommunication to form one between hose (7) outer wall and bellows (6) inner wall and hold the chamber, it fills into nitrogen gas to hold the intracavity, be equipped with check valve (601) on bellows (6) terminal surface, be equipped with pressure relief structure on hose (7) to the nitrogen gas that makes to hold the chamber gets into inside hose (7).

2. The blood drawing device for medical examination as claimed in claim 1, wherein the pressure relief structure comprises a valve plate (10) and a tension spring (12), the valve plate (10) is provided with a first exhaust hole (11), the hose (7) is provided with a groove (8), the groove (8) is communicated with the accommodating cavity, the groove (8) is provided with a second exhaust hole (9) so as to communicate the groove (8) with the inside of the hose (7), the valve plate (10) is slidably matched in the groove (8), one end of the tension spring (12) is fixedly connected to the valve plate (10), and the other end of the tension spring is fixedly connected to the inner wall of the groove (8).

3. A blood drawing device for medical examination as claimed in claim 2, wherein the hose (7) is provided with a return spring (13) around it.

4. A blood drawing device for medical examination according to claim 2 or 3, wherein a hemostatic structure is provided on the housing (3) to stop bleeding.

5. The blood drawing device for medical examination according to claim 4, wherein the hemostatic structure comprises an annular gasket (22), the gasket (22) is made of a deformable material, the gasket (22) is slidably sleeved on the needle tube (2), an annular elastic adhesive tape (24) is fixedly connected to the gasket (22), a plurality of ejector blocks (23) are fixedly connected to the outer edge of the elastic adhesive tape (24), through holes are formed in the ejector blocks (23), a rope (30) connected end to end is inserted into the through holes, a plurality of openings (31) are formed in the gasket (22), a sliding block (26) is slidably matched in the openings (31), a first wedge-shaped clamping block (28) is fixedly connected to the openings (31), a second wedge-shaped clamping block (27) is fixedly connected to the sliding block (26), and the first clamping block (28) is matched with the second clamping block (27), rigid coupling sleeve pipe (29) is gone up in slider (26), sleeve pipe (29) cover is established on rope (30), slider (26) rigid coupling is on connecting piece (25), the rigid coupling has connecting rod (16) on connecting piece (25), breach (17) have been seted up on connecting rod (16), the rigid coupling has compression spring (14) on casing (3) inner wall, the rigid coupling has tool bit (15) on compression spring (14), tool bit (15) slidable cooperation is in connecting rod (16) surface.

6. A blood drawing device for medical tests according to claim 5, characterised in that a first driving structure is provided in the casing (3) to drive the slide (26) to slide in the opening (31).

7. The blood drawing device for medical examination according to claim 6, wherein the first driving structure comprises a movable rod (18) and a first spring (21), one end of the movable rod (18) is fixedly connected to the sliding sleeve (5), the other end of the movable rod (18) is provided with a mounting groove (19), a pawl (20) is hinged in the mounting groove (19), one end of the first spring (21) is fixedly connected to the inner wall of the mounting groove (19), the other end of the first spring is fixedly connected to the pawl (20), a wedge-shaped third clamping block (161) is fixedly connected to the connecting rod (16), and the pawl (20) is matched with the third clamping block (161).

8. A blood drawing device for medical examination according to claim 7, wherein the housing (3) is provided with a second driving structure for driving the movable rod (18) to move axially along the needle tube (2).

9. The blood drawing device for medical examination as claimed in claim 8, wherein the second driving structure comprises a wedge-shaped button (32) and a wedge-shaped stopper (33), the housing (3) is provided with a button hole (301), the button (32) is slidably fitted in the button hole (301), the stopper (33) is fixed on the movable rod (18), and the inclined surface of the button (32) abuts against the inclined surface of the stopper (33).