WO2014169436A1 - Needle cylinder type vacuum blood sampler with jacking needle tube - Google Patents

Abstract

Disclosed is a needle cylinder type vacuum blood sampler with a jacking needle tube, comprising a blood vessel-puncturing needle tube (11), a puncturing needle seat (12), a blood-sampling needle tube (21), a blood-sampling needle seat (22) and a cylinder-shaped needle cylinder (5). The core cavity of the puncturing needle seat (12) is in communication with that of the blood-sampling needle seat (22) and serves as a blood-sampling channel, and a vacuum blood-sampling tube (4) can be inserted into a cylinder-shaped empty cavity at the back of the needle cylinder (5). The main points of the composition of the blood sampler lie in that a grabber (6) is provided at the outer peripheral wall of the needle cylinder (5), the grabber (6) has at least two wings (61) respectively corresponding to an operating finger, and the distance from the wings (61) to the bottom of a vacuum blood-sampling tube (4) inserted into the needle cylinder (5) corresponds to that from the operating finger to the centre of a palm. Compared with the prior art, the vacuum blood sampler has a large operating force, can easily apply the force, is stable in operation, reasonable in structure and the manufacturability of the assembly is good.

Description

 Syringe vacuum blood collection device for pushing blood collection tube  Instruction manual

 Technical field

 The invention relates to a human external vacuum blood collection device for clinical medical treatment, in particular to a syringe vacuum blood collection device for pushing a blood collection tube.

 Background technique

 A syringe type vacuum blood collection device in the prior art is shown in Fig. 1 and Fig. 2, and includes a vascular puncture needle 11 and a puncture needle holder 12 , blood collection needle 21, blood collection needle holder 22, soft connection tube 3, vacuum blood collection tube 4 and a transparent cylindrical syringe 5 . The puncture needle holder 12 is located at the front end of the syringe 5 and can be fixed to the syringe 5 The puncture needle holder is slidable relative to the syringe 5 when it is a safety type with needle tip protection. The blood collection needle holder 22 is fixed to the inner front wall of the syringe 5, and the two needle holders are connected by a soft connecting tube 3, and the needle barrel 5 The rear end of the cylindrical cavity is open, and the vacuum blood collection tube 4 can be freely inserted into the cylindrical cavity.

 In clinical use, the needle tube 11 is first pierced into the blood vessel, and after the blood is returned through the soft connecting tube 3, the needle is held by one hand. The other hand inserts the front end of the vacuum blood collection tube 4 into the cylindrical cavity of the syringe, and inserts it inwardly to allow the blood collection needle tube 21 to pass through the vacuum blood collection tube sealing rubber plug 41 To achieve the purpose of blood collection. The above-mentioned blood collection needle piercing process needs to overcome two resistances: one is the rebound force generated by the anti-drip rubber sleeve 23, and the anti-drip rubber sleeve 23 is coated on the blood collection needle tube 21 On the tip of the needle; the second is the needle through the vacuum blood collection tube sealing rubber plug 41 Frictional resistance. In order to overcome the two resistances, the operation force of pushing the vacuum blood collection tube must be large, so that the phenomenon of vacuum blood collection tube sloshing and unstable cylinder clamping is easy to occur, and the needle tip can be directly caused by shaking or unstable clamping. The risk of scratching the intima of the blood vessels or breaking through the blood vessels, both of which cause further damage to the blood vessels, which may cause inflammation.

The prior art still has a deficiency in clinical use. In the assembly process, one of the puncture needle assembly and the blood collection needle assembly that has been connected with the hose is first assembled into the inner cavity of the cylindrical syringe, and is fixedly fixed. , and then assemble another component, because the inner cavity of the cylindrical syringe is relatively small, it is bound to bring about poor assembly process and low efficiency.

 Invention composition

The object of the present invention is to overcome the deficiencies in the prior art, and to provide a push-pull blood collection tube which is convenient to apply, has difficulty in generating sloshing and is easy to operate during operation. A syringe type vacuum blood collection device; a further object of the present invention is to provide a syringe type vacuum blood collection device that is more rational in structure and better in assembly process.

 The object of the present invention is achieved by the following route.

 a syringe vacuum blood collection device that pushes a blood collection tube, The utility model comprises a vascular puncture needle tube, a puncture needle seat, a blood collection needle tube, a blood collection needle holder and a cylindrical needle tube. The puncture needle tube is connected to the blood collection needle tube via the puncture needle holder and the blood collection needle holder, and the vacuum blood collection tube can be inserted into the tube at the back of the syringe barrel. In the shaped cavity, the main point of the composition is that a peripheral hand is provided on the outer peripheral wall of the syringe, and the gripper has at least two wings respectively corresponding to the operating fingers, and the wings are inserted into the vacuum blood collection tube inserted in the syringe. The distance from the bottom corresponds to the distance from the finger to the palm of the hand.

In this way, the operation only needs to insert the vacuum blood collection tube into the syringe with one hand, then the palm rests against the bottom of the blood collection tube, and the index finger and the middle finger respectively hold the left and right wings of the gripper assembled on the syringe, and the index finger and the middle finger are not moved in situ. The palm bottom moves forward, pushing the blood collection tube into the blood collection needle tube, and the insertion of the blood collection needle tube is easily completed. Since the index finger and the middle finger are not moved in situ, the front end puncture needle tube shaking is prevented, and the needle tip of the puncture needle tube is prevented from being damaged to the inner wall of the blood vessel.

 The object of the present invention can also be achieved by the following means.

 There are two wings in the wings, which are evenly distributed along the outer circumference of the cylinder. or

 The gripper is an annular surface distributed around the outer circumference of the cylinder.

 This annular surface has no directionality, and any position on the annular surface can be used as a wing.

The rear end of the syringe has a non-returning step, and the gripper is an elliptical piece having a central opening, the aperture corresponding to the outer diameter of the syringe, by which the oval piece of the syringe is inserted from the front end of the barrel and Stop the steps and touch.

 In this way, the gripper and the syringe are separated and built in, which is easy to manufacture and reduce the packaging volume.

 The cylindrical cavity at the rear of the syringe has a stop face of the vacuum blood collection tube, and the forward-moving vacuum blood collection tube is pierced by the blood collection needle tube after the sealing rubber plug is inserted thereon. The front end face of the sealant plug is in contact with the stop face.

 The contact between the stop face and the front end face of the sealant boot prevents the advancement of the vacuum blood collection tube.

The inner cavity of the syringe is provided with three reinforcing ribs which are uniformly distributed in the circumferential direction and extend in the axial direction, and the rear end surface of the reinforcing rib serves as a stopping surface of the vacuum blood collecting tube.

The puncture needle hub and the blood collection needle hub are integrally constructed and form a needle seat, and the needle seat and the sliding arm and the pusher constitute a sliding component, and the sliding component is mounted on the syringe in a sliding manner relative to the syringe, and the needle seat is located on the needle In the inner cavity of the cylinder, the sliding arm passes through the inner and outer sides of the sliding groove on the side wall of the cylinder to connect the needle seat and the pushing hand, and the pushing hand is located outside the cylinder, and the sliding groove extends along the axial direction of the cylinder.

 In this way, after the puncture and blood collection is completed, the hand can be pulled back until the puncture needle tube is hidden into the inner cavity of the syringe to prevent the puncture needle tube from injuring others and causing infection.

 A blood return chamber is provided in the needle seat, and the needle seat is made of a transparent material.

 The puncture needle tube and the blood collection needle tube are integrally constructed and form a horizontal-folding - The transverse shape, wherein the two horizontal sections are respectively a puncture needle tube and a blood collection needle tube, the folding section is a joint portion of the puncture needle tube and the blood collection needle tube, and the blood return chamber is arranged in the needle seat, and the blood return groove is arranged on the needle tube to communicate with the blood return chamber, the needle seat Made of transparent material.

There are two chutes, which are oppositely disposed on both sides of the barrel. The sliding arm is composed of two oppositely distributed support arms. One end of the support arm is fixed or integrated with the needle seat, and the other end extends outward to pass through the corresponding one. The chute is connected to the pusher or integrated.

In this way, the two support arms are arranged to the left and right, and the pusher is outside the syringe and the needle seat is in the syringe. The three are connected or integrated, and the overall rigidity is good, and the left and right support arms ensure the stability of the blood collection assembly slip.

 The front protrusion of the chute has an elastic protrusion, and the elastic protrusion is elastically contacted with the sliding arm, and the sliding arm under the operating force climbs over the elastic protrusion and slides backward.

Thus, before the end of the puncture, the slip assembly is positioned by the elastic protrusion, and the slide arm will forcibly climb over the elastic protrusion only under the action of the pull-back operation force.

A process mounting groove extends axially from the rear end of the barrel to the chute, and the blood collecting slide arm is inserted from the process mounting groove until entering the chute, whereby the blood collecting component and the barrel are axially inserted and nested .

 The installation of the process tank allows the slip assembly to be assembled in advance and assembled with the syringe, which greatly improves the assembly process.

 The slit width of the process mounting groove is slightly narrower than the groove width of the blood collection chute.

Thus, by means of the opening of the front end of the process mounting groove and the elasticity of the plastic material of the syringe, the installation process groove is opened by the elastic deformation during installation, and the blood collecting sliding arm is plugged, and the groove width of the blood collecting chute and the blood collecting sliding arm The arm width corresponds to such that the process mounting slot can act as a resilient tab for the smoothly slipping blood slide arm in the blood collection chute without even having to plug the process mounting slot afterwards.

Of course, it is also possible to specifically provide an elastic protruding card at the joint of the process mounting groove and the sliding groove, the elastic convex card is composed of a cantilever which is suspended in the extending direction of the sliding groove and an elastic protruding point provided at the cantilever end.

 By means of this elastic tab, the slip assembly that has been slid back into position is stopped.

 A backflow prevention valve for preventing reverse flow of blood is provided on the blood passage of the puncture needle holder or the blood collection needle holder.

 In this way, it is possible to prevent blood from being reversed when the blood collection is completed, the blood band is released, and the blood is taken from the blood vessel to the instantaneous blood pressure of the blood collection site.

 There are many options for anti-backflow valves. The prior art is more common. The following is an optimization option:

 The anti-backflow valve is mounted on the blood collection needle holder and is a diaphragm type check valve.

 The backflow prevention valve is mounted on the blood collection needle holder to prevent blood from flowing back in the first place. Moreover, it does not interfere with the backstop structure provided on the puncture needle hub.

The diaphragm type one-way valve is composed of a film and a fixed ear, the outer diameter of the diaphragm is larger than the blood passage in the blood collection needle seat, and the front side thereof is in contact with a step surface in the blood passage, and the fixed ear and the blood collection needle holder are fixed. The fixing tongue on the film presses against one side of the film, and the other side of the film oscillates backwards under negative pressure to give out the blood passage. When the pressure is balanced or positive pressure, the diaphragm is restored by its own elasticity and the step surface is closed to close the liquid passage. .

Thus, when the pressure is positive, that is, if the liquid pressure on the outlet side of the check valve is greater than the pressure on the liquid side of the check valve, the diaphragm is pressed tightly to the bottom plane of the needle cavity to close the liquid passage to prevent the liquid from flowing backward.

 Another optimization option for anti-backflow valves is:

 Anti-backflow valve is made up of 2-5 The piece is composed of tongues uniformly distributed in the circumferential direction and extending in the axial direction, and the plurality of tongue pieces are gathered together to form a pointed or cone-shaped shape, and the pointed or tapered shape is backward and retracted into the inner cavity of the syringe. The puncture tip is opposite.

 Two pieces of tongue are gathered together to form a sharp horn, and 3-5 The tongue pieces are formed together to form a cone-shaped tip shape, and the sharp-angled or the tapered-point shape has the effect of closing together, and the needle tip is difficult to pass through the tip and the corner of the closed closed corner, and the closed-close and reverse pressure acts. The sharp and angular structure that makes it close and close together also makes it have a backflow prevention effect.

 In summary, the present invention has the following advantages over the prior art: large operating force, convenient force application, and stable operation. The structure is reasonable and the assembly process is good.

 DRAWINGS

 1 is a schematic view showing the structure of a syringe type vacuum blood collection device in a state in which the blood collection needle tube is not pierced;

 2 is a schematic view showing the structure of a syringe type vacuum blood collection device in the state in which the blood collection needle tube has been pierced;

 Figure 3 is a schematic perspective view showing the structure of a syringe type vacuum blood collection device for pushing a blood collection tube according to a preferred embodiment of the present invention;

 Figure 4 is a schematic cross-sectional view showing the structure of a syringe type vacuum blood collection device for pushing a blood collection tube according to a preferred embodiment of the present invention;

 Figure 5 is a schematic view of the syringe vacuum blood collection device for pushing the blood collection tube according to the preferred embodiment of the present invention after blood collection is completed;

 Figure 6 is a schematic perspective view showing the structure of a slip assembly in a syringe type vacuum blood collection device for pushing a blood collection tube according to a preferred embodiment of the present invention;

 Figure 7 is a schematic perspective view showing the structure of a syringe in a syringe type vacuum blood collection device for pushing a blood collection tube according to a preferred embodiment of the present invention;

 Figure 8 is a schematic perspective view showing the structure of a gripper in a syringe type vacuum blood collection device for pushing a blood collection tube according to a preferred embodiment of the present invention;

 Figure 9 is a schematic view showing the installation of the backflow prevention valve on the blood collection needle holder;

 Figure 10 is a schematic view showing the structure of the anti-backflow valve of Figure 9.

 Label description:

 11 puncture needle 12 puncture needle seat 13 sliding arm 14 push hand 21 blood collection needle 22 blood collection needle seat 23 anti-drip rubber sleeve 3 soft connection tube 4 vacuum blood collection tube 41 sealing rubber plug 5 syringe 51 process installation slot 52 chute 53 elastic convex card 54 stop step 55 elastic bump 6 grip 61 wings 1 needle seat 71 back blood chamber 72 back blood tank 8 anti-backflow valve

 The invention will now be described in greater detail with reference to the drawings.

 detailed description

 Best embodiment:

 Referring to Figures 3, 4 and 5, the syringe vacuum blood collection device for pushing the blood collection tube includes a vascular puncture needle 11 , a puncture needle holder 12 , a blood collection needle tube 21, a blood collection needle holder 22 and a cylindrical syringe 5, the puncture needle tube 11 is connected to the blood collection needle tube 21 via the puncture needle holder 12 and the blood collection needle holder 22, and the vacuum blood collection tube 4 can be inserted into the needle barrel 5 In the rear cylindrical cavity, a gripper 6 is disposed on the outer peripheral wall of the syringe 5, and the gripper 6 has at least two wings 61 corresponding to the operating fingers, and the wings 61 are inserted into the syringe. Vacuum blood collection tube 4 The distance from the bottom corresponds to the distance from the finger to the palm.

 Referring to Figure 8, the rear end of the syringe 5 has a retreating step 54 and a gripper 6 It is an elliptical piece having a central opening and an aperture corresponding to the outer diameter of the barrel, by which the elliptical piece which is inserted into the barrel 5 from the front end of the barrel 5 is in contact with the retreating step 54.

 Referring to Fig. 6, the puncture needle holder 12 is integrally formed with the blood collection needle holder 22 and constitutes a needle holder 7, the needle holder 7 and the sliding arm 13 The pusher 14 constitutes a slip assembly which is slidably mounted on the syringe 5 with respect to the syringe 5, the needle hub 7 is located in the inner cavity of the syringe 5, and the slide arm 13 passes through the side wall of the syringe 5 Chute 52 Connect the needle holder 7 and the pusher 14 inside and outside, and push the hand 14 outside the syringe 5. Sliding arm 13 It consists of two oppositely distributed support arms. One end of the support arm is fixed to the needle holder, and the other end extends outwardly to pass through the corresponding chute 52 and is integrally formed with the pusher 14. Puncture needle 11 and blood collection needle 21 The body is integrally formed and formed into a horizontal-folded-horizontal shape, wherein the two horizontal sections are a puncture needle tube 11 and a blood collection needle tube 21, and the folding section is a joint portion of the puncture needle tube and the blood collection needle tube, and the needle holder 7 is provided with a blood return chamber. 71. The needle tube is provided with a blood returning groove 72 communicating with the blood returning chamber 71, and the needle seat 7 is made of a transparent material.

 Referring to Figure 7, the chute 52 extends along the axial direction of the barrel 5, and there are two chutes 52, which are oppositely disposed on the barrel 5 On both sides. A process mounting groove 51 extends axially from the rear end of the barrel 5 to the chute 52, and the slide arm 13 is inserted from the process mounting groove 51 until it enters the chute 52. Thereby, the blood collection component and the syringe 5 are axially inserted and nested. The slit width of the process mounting groove 51 is slightly narrower than the chute 52 Slot width. Thus, by means of the opening of the front end of the process mounting groove and the elasticity of the plastic material of the syringe, the installation process groove is opened by the elastic deformation during installation, and the blood collecting sliding arm is plugged, and the groove width of the blood collecting chute and the blood collecting sliding arm The arm width corresponds to such that the process mounting slot can act as a resilient tab for the smoothly slipping blood slide arm in the blood collection chute without even having to plug the process mounting slot afterwards. In the process installation slot The engaging portion of the 51 and the chute 52 is specifically provided with a resilient tab 53 which is composed of a cantilever which extends in the direction in which the chute 52 extends and an elastic projection provided at the end of the cantilever. Chute 52 The front projection has an elastic protrusion 55 which is elastically engaged with the sliding arm 52, and the sliding arm 52 under the operating force climbs over the elastic projection 55 to slide backward.

 Referring to Fig. 9 and Fig. 10, a backflow prevention valve 8 for preventing reverse flow of blood is provided on the blood passage of the blood collection needle holder. The anti-backflow valve 8 It consists of two symmetrically disposed tongues 81 and a fixing ring 82. The anti-backflow valve 8 is fixed in the inner cavity of the blood collection needle seat through the fixing ring 82. The two symmetrical tongues 81 are closed and have a pointed shape. This close-and-close configuration and the reverse pressure action make it more close and close to the sharp-angled structure, so that it has anti-backflow effect.

 The parts not described in this embodiment are the same as the prior art.

Claims (18)

1. A syringe vacuum blood collection device for pushing a blood collection tube includes a vascular puncture needle tube, a puncture needle holder, a blood collection needle tube, a blood collection needle holder and a cylindrical syringe, and the puncture needle tube is connected to the blood collection needle tube through the puncture needle holder and the blood collection needle holder, and the vacuum The blood collection tube can be inserted into the cylindrical cavity at the rear of the syringe, wherein the outer peripheral wall of the syringe is provided with a gripper having at least two wings corresponding to the operating fingers, the wings The distance to the bottom of the vacuum blood collection tube inserted in the syringe corresponds to the distance from the operating finger to the palm.
2. According to claim 1 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that the wings have two wings and are evenly distributed along the outer circumferential surface of the needle barrel.
3. According to claim 1 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that the gripper is an annular surface distributed around the outer circumferential surface of the needle barrel.
4. According to claim 1 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that the back end of the syringe tube has a stop step, and the gripper is an elliptical piece with a central opening, and the aperture corresponds to the outer diameter of the syringe. The elliptical piece that is inserted into the barrel from the front end of the barrel by the opening is in contact with the stop step.
5. According to claim 1 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that the cylindrical cavity at the rear of the syringe has a stop surface of the vacuum blood collection tube, and the forward-moving vacuum blood collection tube is pierced by the blood collection needle tube. After the rubber stopper is sealed, the front end surface of the sealing rubber plug cover on the sealing rubber plug contacts the stopping surface.
6. According to claim 1 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that: the inner cavity of the syringe barrel is provided with three reinforcing ribs, the three reinforcing ribs are uniformly distributed along the circumference and extend in the axial direction, and the rear end surface of the reinforcing rib is used as a vacuum blood collection tube. The stop face.
7. According to claim 1 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that the puncture needle holder and the blood collection needle holder are integrally constructed and constitute a needle seat, and the needle holder and the sliding arm and the pushing hand constitute a sliding component, and the sliding The moving component is mounted on the syringe in a sliding manner relative to the syringe. The needle seat is located in the inner cavity of the syringe. The sliding arm passes through the inner and outer slots of the side wall of the syringe to connect the needle holder and the pusher. The pusher is located outside the syringe and slides. The groove extends axially along the barrel.
8. According to claim 7 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that a blood return chamber is arranged in the needle seat, and the needle seat is made of a transparent material.
9. The syringe vacuum blood collection device for pushing a blood collection tube according to claim 1, wherein the puncture needle tube and the blood collection needle tube are integrally constructed and form a horizontal-folding- The transverse shape, wherein the two horizontal sections are respectively a puncture needle tube and a blood collection needle tube, the folding section is a joint portion of the puncture needle tube and the blood collection needle tube, and the blood return chamber is arranged in the needle seat, and the blood return groove is arranged on the needle tube to communicate with the blood return chamber, the needle seat Made of transparent material.
10. According to claim 1 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that: there are two chutes, which are oppositely disposed on two sides of the syringe, and the sliding arm is composed of two oppositely distributed support arms, and one end of the support arm is The needle seat is fixed or integrated, and the other end extends outwardly to pass through the corresponding sliding slot and is connected or integrated with the pusher.
11. According to claim 1 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that the front portion of the sliding groove has an elastic protruding point, and the elastic protruding point is elastically contacted with the sliding arm, and the sliding arm under the operation force climbs over This elastic bump slides back.
12. According to claim 1 The syringe vacuum blood collection device for pushing a blood collection tube is characterized in that a process mounting groove extends from the rear end of the syringe axially to the slot, and the blood collecting sliding arm is inserted from the process mounting slot until Entering the chute and thereby, the blood collection component is axially inserted and nested with the syringe.
13. According to claim 12 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that the slit width of the process mounting groove is slightly narrower than the groove width of the blood collection chute.
14. According to claim 12 or 13 The syringe type vacuum blood collection device for pushing a blood collection tube is characterized in that an elastic protruding card is arranged at a joint portion between the process mounting groove and the sliding groove, and the elastic convex card is suspended by a cantilever extending along a direction of the sliding groove And an elastic bump set at the cantilever end.
15. According to claim 1 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that a blood flow prevention passage for preventing reverse flow of blood is provided on the blood passage of the puncture needle holder or the blood collection needle holder.
16. According to claim 15 The syringe type vacuum blood collection device for pushing the blood collection tube is characterized in that the anti-backflow valve is installed on the blood collection needle holder and is a diaphragm type one-way valve.
17. According to claim 16 The syringe type vacuum blood collection device for pushing a blood collection tube is characterized in that the diaphragm type one-way valve is composed of a film and a fixed ear, and the outer diameter of the diaphragm is larger than the blood passage in the blood collection needle seat and the front side thereof and the blood A step surface contact in the channel is contacted, the fixing ear is fixedly connected with the blood collecting needle holder, and the fixing tongue on the film is pressed against one side of the film, and the other side of the film is swayed backward under negative pressure to allow blood passage, pressure balance Or when the positive pressure is pressed, the diaphragm is restored to its original shape and the step surface is closed to close the liquid passage.
18. A syringe vacuum blood collection device for pushing a blood collection tube according to claim 15, wherein the backflow prevention valve is 2-5 The piece is composed of tongues uniformly distributed in the circumferential direction and extending in the axial direction, and the plurality of tongue pieces are gathered together to form a pointed or cone-shaped shape, and the pointed or tapered shape is backward and retracted into the inner cavity of the syringe. The puncture tip is opposite.

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