CN203647794U - Safe indwelling needle for blood sampling and transfusing - Google Patents

Abstract

A safety indwelling needle assembly for blood collection and transfusion, including a puncture needle and a sleeve seat, the puncture needle is composed of a needle core and a soft sleeve, the sleeve base is connected to the rear of the soft sleeve, and an isolation plug is arranged in the sleeve base, The rear end of the needle core is provided with a needle handle seat, and the needle handle is fixedly connected to the needle handle seat. The front end of the needle core passes through the isolation plug and is inserted into the soft casing. The casing seat has a bypass port, the bypass port and the extension tube connection, the extension tube is provided with a positive pressure stop clamp, and the tail lumen of the extension tube is a straight-through lumen, which is connected with a needle-free puncture joint. The safe blood collection and transfusion indwelling needle assembly of the utility model has the functions of drawing blood and transfusion, is simple to operate, is convenient to use, serves multiple purposes at one stroke, and is fully closed to operate, which can effectively protect the safety of patients and medical personnel.

Description

Safety blood collection infusion indwelling needle assembly

technical field

The utility model belongs to the technical field of medical supplies, and relates to a blood collection tool and an infusion tool, in particular to a safe blood collection and transfusion indwelling needle assembly.

Background technique

Intravenous infusion and venous blood collection are the most basic clinical technical operations in hospitals. The most commonly used tool for intravenous infusion is the use of intravenous indwelling needles. Please refer to Figure 1 and Figure 2. The needle core 1 and the soft sleeve 2 are composed, the sleeve seat 3 is connected to the rear part of the soft sleeve 2, the sleeve seat 3 is provided with an isolation plug, the rear end of the needle core 1 is provided with a needle handle 4, and the needle core 1 The front end passes through the isolation plug and is inserted into the soft sleeve 2. The sleeve seat 3 has a bypass port 5, which is connected to the extension tube 6. The isolation plug is made of medical rubber. Through the sealing function of the isolation plug, it can ensure After the needle core is pulled out, the blood will not leak from the inner hole of the cannula seat, and at the same time, the liquid channel of the bypass port 5 will not be blocked.

The extension tube 6 is provided with a stop piece 7, and the tail lumen of the extension tube 6 is a bifurcated structure, that is, two lumens, the first lumen 8 is connected with the heparin cap 9 (or high-density elastic rubber cap), The second lumen 10 is connected to the sealing cap 11, and the venous indwelling needle can be retained for several days after puncture, which can reduce the damage to blood vessels and surrounding tissues caused by repeated punctures, but the venous indwelling needle also has shortcomings: firstly, the needle core 1 of the puncture needle is not protected For the device, when the needle core 1 is pulled out from the soft cannula 2 and the cannula seat 3, the needle core 1 is completely exposed, which may scratch the medical staff and increase the risk of blood-borne cross-infection. Secondly, venous indwelling needles are not suitable for drawing blood for the following reasons:

One is that the extension tube 6 of the venous indwelling needle is too long and has a large volume. In addition, the tail is a two-chamber structure, and the volume of each chamber is relatively large, resulting in more residual locking fluid. When blood is drawn, the mixed part of the blood and locking fluid All should be discarded, not only a waste of blood, but also prone to hemolysis, resulting in a decline in the quality of blood collection.

The second is that the flow stop piece 7 on the extension tube 6 cuts off the liquid passage by the flow stop seam. When the flow stop seam is closed, no positive pressure can be generated, and the liquid cannot be pushed forward automatically. Inside, the indwelling needle will be blocked after solidification.

The 3rd, heparin cap joint 9 can't be directly connected with existing disposable venous blood collection needle, but can only be connected with the needle head of syringe 12, please refer to Fig. 3, Fig. 4, the front end of syringe 12 has needle head 13, after blood collection, use The needle 13 is inserted into the blood collection test tube to inject blood, which belongs to the open operation of needle exposure, and there is also the possibility of accidentally injuring the operator and cross-infection. After removing the needle 13 of the syringe 12, removing the sealing cover 11 of the second lumen 10 at the tail of the intravenous indwelling needle, insert the nipple 14 of the syringe 12 directly into the port 19 of the second lumen 10, although it can be pumped blood, but this connection is not secure, and it is easy to cause blood to spill.

In order to reduce the acupuncture operation of the infusion set connector, a needle-free puncture connector has recently appeared, which has two kinds of screw and non-screw, please refer to Fig. 5 and Fig. 6, the needle-free puncture connector 15 of the screw The threaded thread 17 has an external threaded thread 18 at the rear end, and its liquid channel is sealed by a separation membrane 16. The threaded needle-free puncture joint 15 can replace one of the heparin cap 9 or the sealing cap 11, but because the needle-free puncture joint 15 relies on the septum 16 of its afterbody to connect, so, can only be used with the supporting use of special-purpose screw infusion set connector, can not be connected with venous blood collection needle.

When clinically carrying out blood drawing in the hospital at present, besides using the syringe, the most commonly used is to use the venous blood collection needle 20, please refer to Fig. 7, Fig. The puncture needle 22, the puncture needle 21 and the puncture needle 22 are all steel needles, the puncture needle 21 and the puncture needle 22 are connected with a soft extension tube 23, the puncture needle 21 is used for puncturing blood vessels, and the puncture needle 22 is used For piercing the rubber cap 25 at the front end of the negative pressure blood collection tube 24, the puncture needle 22 has a hemostatic sleeve 26, and the puncture needle 21 has two wings 27, which are small in size and are easier to operate than syringes. The puncture needle 22 is far away from the puncture point, which is convenient Replace the negative pressure blood collection tube 24. The negative pressure blood collection tube 24 is also called a vacuum blood collection tube. There is a certain degree of vacuum in the tube. By using negative pressure blood collection, multiple tubes can be punctured at one time. The venous blood collection needle is a two-way needle structure, which also has shortcomings. Where:

The one is that the puncture needle is a hard steel needle, which is very irritating to the blood vessels and subcutaneous tissue and cannot be left in place; the other is that the puncture needle is a bare steel needle. Needle tip, when piercing into the negative pressure blood collection tube 24, the piercing cap needle 22 first punctures the blood blocking cover 26, and then punctures the rubber cap plug 25 at the front end of the negative pressure blood collection tube 24. Extra care must be taken when inserting and withdrawing the needle. Both the puncture needle and the cap needle may accidentally injure the operator.

Intravenous infusion operations and venous blood collection operations are both interventional operations on blood vessels. Each time the puncture needle will pierce the skin and blood vessels, after the puncture needle is withdrawn, the blood vessels and skin at the puncture point will take a while to heal , so the fewer puncture points the better, especially for patients with poor vascular healing and repair ability, some patients have a history of long-term chronic diseases (blood disease, kidney disease, connective tissue disease, diabetes, etc.), poor vascular condition, venous thrombosis, vascular Inconspicuous, severe vascular injury may cause difficulty in healing or complications after multiple punctures, such as redness and swelling of the skin, bruises, and even phlebitis.

For the medical staff, each time they puncture, they must concentrate their attention, choose the appropriate needle insertion speed, needle insertion angle, and strive to achieve a sharp point, reduce the patient's tingling pain, needle insertion operation, needle withdrawal operation and connection negative pressure In the operation of blood collection tubes, every step must be done carefully. If there is a slight carelessness, the medical staff may be accidentally injured by the needle, and blood-borne cross-infection may occur.

Repeated puncture will also increase the difficulty and workload of medical staff, because the best puncture point must be selected for each puncture, and it is difficult for some patients to find multiple optimal puncture points, such as infants and young children with thin veins and insufficient blood vessels or consciousness Obese patients with deep and hidden blood vessels or thin patients with less subcutaneous fat and slippery blood vessels, etc.

To sum up, it can be seen that the puncture of the venous blood collection needle can only collect blood once. Although multiple tubes can be used at one time, they cannot be indwelled. Each structure has its own strengths, but it also has its own shortcomings. Since there is no commonality in the structure, they cannot be connected with each other, and they cannot maximize their strengths and avoid weaknesses, so they are in urgent need of improvement.

Utility model content

In order to solve the above problems, the purpose of this utility model is to provide a safe blood collection and infusion indwelling needle assembly, which has the functions of blood drawing and infusion, is simple and easy to do, serves multiple purposes, and can effectively protect the safety of patients and medical staff. .

In order to achieve the above object, the utility model adopts the following technical solutions:

A safety indwelling needle assembly for blood collection and infusion, including a puncture needle and a sleeve seat, the puncture needle is composed of a needle core and a soft sleeve, the sleeve base is connected to the rear of the soft sleeve, and an isolation plug is arranged in the sleeve base, The rear end of the needle core is provided with a needle handle seat, and the needle handle is fixedly connected to the needle handle seat. The front end of the needle core passes through the isolation plug and is inserted into the soft casing. The casing seat has a bypass port, the bypass port and the extension tube The connection is characterized in that: the extension tube is provided with a positive pressure stop clamp, and the tail lumen of the extension tube is a straight-through lumen, which is connected with a needle-free puncture joint.

The outside of the lumen is provided with an external thread thread, and the needle-free puncture joint is provided with an internal thread thread, and the needle-free puncture joint is connected to the lumen by screwing.

The assembly also includes a blood collection needle, the blood collection needle is composed of a piercing needle, a needle holder, and an infusion set connector, the needle holder is cylindrical, and its front end is provided with a central hole seat. The infusion set connector is arranged on the outside of the needle holder, and the piercing cap needle and the infusion set connector are all fixedly connected to the central hole seat of the needle holder.

The assembly also includes a recovery cylinder, the rear end of the recovery cylinder is provided with a plug, the outer wall of the recovery cylinder is provided with a guide groove, the needle handle seat is fixed with a sliding piece that matches the guide groove, and the tail of the needle handle seat is provided with a pin. There is a barb on the pin, a socket is provided on the plug, and an annular limit groove is provided on the inner wall of the socket. The rear end of the casing seat is provided with an L-shaped slot, and the front end of the recovery cylinder is provided with a cylindrical The clamping block is engaged with the clamping groove.

The surface of the needle holding cylinder is provided with convex ribs.

A hemostatic sheath is arranged on the outside of the piercing needle.

The positive pressure flow stop clip is composed of a lock part and a snap part. The main body of the positive pressure stop clip is U-shaped and has two opposite side walls. The snap part is composed of one of the side walls, and the lock part is composed of The upper end of the other side wall is bent, the free end of the lock part is provided with a lock hook, the lock hook is formed by a slope towards the snap part, and the middle part of the two side walls of the main body is provided with a pressing block, which is wedge-shaped. A through hole is provided at the bend at the upper end of the main body and at the return bend at the lower end.

The innovation of the utility model is:

The structure of the current venous indwelling needles and venous blood collection needles has been improved, each takes its own strengths and avoids weaknesses, making it more scientific and reasonable, and optimizes the configuration to connect and cooperate with each other. At the same time, a protective device is added, and the whole process is closed. Exposure, good safety performance, can effectively protect the safety of patients and medical staff.

The specific improvements are as follows:

1. Change the lumen at the tail of the existing intravenous indwelling needle from a bifurcated double-lumen structure to a single-path lumen, that is, a straight-through lumen, and shorten the extension tube to reduce the volume of the extension tube. The volume of the lumen is also smaller than that of the bifurcated lumen, which reduces the amount of locking fluid. When drawing blood, it can save blood, improve the quality of blood collection, and make better use of the negative pressure blood collection of negative pressure blood collection tubes. When the blood return speed is fast, it is convenient for intermittent blood drawing and infusion.

2. The second is to change the non-pressure stop sheet on the extension tube into a positive pressure stop clip. The positive pressure stop clip can be operated with one hand to cut off the pipeline. When the two wedge-shaped pressure blocks are closed, positive pressure can be generated. It can automatically push the liquid in the extension tube forward. This unique design can prevent blood from backflowing into the indwelling needle, thereby reducing the clogging rate of the indwelling needle to zero.

3. A recovery cylinder is added at the rear end of the cannula seat of the indwelling needle to prevent accidental injury to the operator when the needle core is withdrawn, and to avoid accidental infection.

4. The blood collection needle is equipped with a needle holder so that the piercing cap needle is not exposed, which can effectively protect the safety of medical staff and patients.

5. The connector of the infusion set is carefully selected, and the needle-free puncture connector in the prior art is adopted. When connecting with the blood collection needle, it is a spiral screwing operation, which does not require needle insertion operation, reducing accidental needle injuries and cross-infection. chance, the spiral connection can also effectively avoid the phenomenon of leakage or falling off due to loose connection, which brings convenience to the work of nursing staff.

Owing to adopting above-mentioned technical scheme: the utility model has following positive beneficial effect:

1. This product is suitable for patients who need intravenous indwelling infusion and blood drawing. It is safe and reliable, and the whole process is closed operation, which can effectively protect the safety of medical staff and patients, and minimize the chance of infection for both doctors and patients.

2. This product is suitable for special patients, such as infant patients with thin veins and insufficient blood vessels, or patients with disturbance of consciousness, mental disorders, incoordination, restlessness, or elderly patients with poor blood vessel elasticity, tightness and hardening. Or obese patients with deep and hidden blood vessels, or thin patients with less subcutaneous fat and sliding blood vessels, etc.

3. This product is suitable for critically ill patients. This product can simultaneously establish a venous blood drawing channel and an infusion channel through one puncture, which is convenient for clinical blood testing, medication and rescue of critical and critically ill patients, and maximizes the rescue time.

4. It can reduce the workload of medical staff and improve the work efficiency of medical staff.

5. The indwelling needle of this product is equipped with a recovery cylinder, and the blood collection needle is equipped with a needle holding cylinder, which plays a role of safety protection for medical personnel, prevents the needle from being exposed during the needle withdrawal operation and accidentally injures the operator, and avoids cross-infection.

Description of drawings

Fig. 1 is a schematic structural view of an intravenous indwelling needle in the prior art.

FIG. 2 is an exploded view of FIG. 1 .

Fig. 3 is a schematic structural view of a syringe in the prior art.

Fig. 4 is a schematic structural diagram of removing the needle from the syringe in Fig. 3 .

Fig. 5 is a structural schematic diagram of a needle-free puncture joint in the prior art.

FIG. 6 is a side view of FIG. 5 .

Fig. 7 is a schematic structural view of a venous blood collection needle in the prior art.

Fig. 8 is a structural schematic diagram of a negative pressure blood collection tube in the prior art.

Fig. 9 is a schematic structural view of an embodiment of the present invention.

FIG. 10 is a schematic diagram of the structure in FIG. 9 with the protective cap removed.

Fig. 11 is a rear view of the utility model.

Fig. 12 is a bottom view of Fig. 11 .

Fig. 13 is a schematic diagram of the external structure of the blood collection needle.

FIG. 14 is a schematic diagram of the internal structure of FIG. 13 .

FIG. 15 is an exploded view of FIG. 14 .

Figure 16 is an exploded view of the indwelling needle.

Fig. 17 is a schematic structural view of the recovery cylinder.

Fig. 18 is a schematic structural view of the stop clip.

Fig. 19 is a sectional view of the recovery cylinder.

FIG. 20 is an exploded view of FIG. 17 .

FIG. 21 is a bottom view of FIG. 20 .

Fig. 22 is a schematic diagram of the connection structure of the needle core, the needle handle and the needle handle seat.

FIG. 23 is a partial sectional view of FIG. 22 .

FIG. 24 is a bottom view of FIG. 23 .

FIG. 25 is a rear view of FIG. 23 .

Fig. 26 is a schematic diagram of the connection structure of the needle handle seat, the plug and the recovery cylinder.

FIG. 27 is a bottom view of FIG. 26 .

Fig. 28 is a structural schematic diagram of the connection between the indwelling needle and the blood collection needle of the present invention.

FIG. 29 is a rear view of FIG. 28 .

Fig. 30 is a schematic diagram of the structure before the blood collection needle is connected to the negative pressure blood collection tube.

Fig. 31 is a schematic diagram of the structure after the blood collection needle is connected to the negative pressure blood collection tube.

FIG. 32 is a rear view of FIG. 30 .

Fig. 33 is a rear view of Fig. 31 .

Fig. 34 is a schematic view of the structure before the indwelling needle is connected to the infusion set.

Fig. 35 is a schematic diagram of the structure after the indwelling needle is connected to the infusion set.

Fig. 36 is a schematic diagram of the packaging structure of the indwelling needle.

FIG. 37 is an exploded view of FIG. 36 .

Fig. 38 is a schematic diagram of the packaging structure of the blood collection needle.

FIG. 39 is an exploded view of FIG. 38 .

Detailed ways

Label in the figure

1 needle core 2 soft bushing 3 bushing seat

4 needle handle 5 bypass port 6 extension tube

7 Flow-stop piece 8 First lumen 9 Heparin cap

10 Second Lumen 11 Sealing Cap 12 Syringe

13 Needle 14 Nipple 15 Needle-free puncture connector

16 separator film 17 internal thread thread 18 external thread thread

19 ports 20 venous blood collection needles 21 puncture needles

22 piercing cap needle 23 extension tube 24 negative pressure blood collection tube

25 rubber cap plug 26 hemostatic cover 27 wings

28 external thread thread button 29 protective cap 30 retaining needle

31 needle core 32 soft sleeve 33 sleeve socket

34 needle handle 35 bypass port 36 extension tube

37 Positive Pressure Stop Clip 38 Lumen 39 Needle Handle

40 blood collection needles 41 piercing cap needles 42 needle holders

43 Infusion set connector 44 Center hole seat 45 Convex

46 blood blocking sleeve 47 limit slot 48 card slot

49 sliding piece 50 recycling bin 51 plug

52 guide groove 53 pins 54 pins

55 Barb 56 Barb 57 Jack

58 block 59 transparent plastic box 60 lock

61 snap button 62 lock hook 63 pressing block

64 pressing blocks 65 through holes 66 through holes

67 transparent plastic box 68 sealing film 69 sealing film

Please refer to Fig. 9, Fig. 10, Fig. 11 and Fig. 12. The utility model is a safety indwelling needle assembly for blood collection and transfusion, which includes an indwelling needle 30 and a blood collection needle 40. The indwelling needle 30 is composed of a puncture needle and a sleeve seat. The needle is composed of a needle core 31 and a soft sleeve 32. The sleeve seat 33 is connected to the rear portion of the soft sleeve 32. An isolation plug is arranged in the sleeve seat 33. The rear end of the needle core 31 is provided with a needle handle seat 39. A needle handle 34 is fixedly connected to the handle seat 39, and the front end of the needle core 31 passes through the isolation plug and is inserted into the soft sleeve 32. The outer portion of the soft sleeve 32 is provided with a protective cap 29, and the sleeve base 33 has a bypass port 35. The bypass port 35 is connected to the extension tube 36. The tail of the extension tube 36 is a straight-through lumen 38. The lumen 38 is connected to the needle-free puncture joint 15. The lumen 38 can be integrally formed with the needle-free puncture joint 15 or can be separated. Manufacturing, in this embodiment, the lumen 38 and the needleless puncture joint 15 are manufactured separately, and the outside of the lumen 38 is provided with an external thread thread 28, and the external thread thread 28 is compatible with the internal thread thread 17 of the needleless puncture joint 15. Cooperate, the needle-free puncture joint 15 is connected with the lumen 38 by screwing.

Please refer to Fig. 13, Fig. 14, Fig. 15, blood collection needle 40 is made up of piercing cap needle 41, needle holder 42, infusion set joint 43, and needle holder 42 is cylindrical shape, and its front end is provided with central hole seat 44, punctures The cap needle 41 is arranged on the inside of the needle holder 42, and the infusion set connector 43 is arranged on the outside of the needle holder 42. The cap needle 41 and the infusion set connector 43 are all fixedly connected with the center hole seat 44 of the needle holder 42, and pass through the center The hole seat 44 is connected, the outside of the piercing cap needle 41 is provided with a hemostatic cover 46, and the surface of the needle holder 42 is provided with a rib 45 which plays an anti-slip effect. Infusion set joint 43 adopts prior art. The infusion set connector 43 can be directly connected with the needleless puncture connector 15, as shown in Fig. 28 and Fig. 29 . Use the needle holder 42 to draw blood conveniently. During operation, just insert the negative pressure blood collection tube 24 into the needle holder 42 and push it forward, as shown in Fig. 30, Fig. 31, Fig. 32 and Fig. 33. At this time, the cap needle 41 will first puncture the blood blocking cover 46, and then puncture the rubber cap 25 at the front end of the negative pressure blood collection tube 24. The negative pressure blood collection tube 24 has a certain degree of vacuum, so the blood in the blood vessel will pass through. The extension tube 36 automatically enters the inside of the negative pressure blood collection tube 24, and the needle holder 42 is set to prevent the piercing needle 41 from being exposed, which can effectively protect the safety of medical personnel.

Please refer to Fig. 16, Fig. 17, Fig. 19, Fig. 20, Fig. 21, Fig. 22, Fig. 23, Fig. 24, Fig. 25, Fig. 26, Fig. 27. The rear end of 50 is provided with plug 51, and plug 51 is fixedly connected with recovery cylinder 50, and the bottom of the outer wall of recovery cylinder 50 is provided with guide groove 52, and needle handle seat 39 is semi-cylindrical, is hooped on the outer wall of recovery cylinder 50, The bottom of the needle handle seat 39 is provided with a sliding plate 49 that cooperates with the guide groove 52, and the afterbody of the needle handle seat 39 is provided with two pins 53, 54, the pin 53 has a barb 55, and the pin 54 has a barb 56, The plug 51 is provided with a socket 57, and the inner wall of the socket 57 is provided with an annular limit groove 47. After the safety indwelling needle is successfully punctured, the needle handle 39 is guided by the sliding plate 49 of the needle handle 39 to drive the needle handle 39. Move backward, so that the needle core 31 is recovered into the recovery cylinder 50, the barbs on the pins 53, 54 cooperate with the limit groove 47 to position the needle handle seat 39, prevent the needle handle seat 39 from moving forward, thereby ensuring that the needle core 31 The needle tip is not exposed, which protects the safety of patients, medical staff and other related personnel, and avoids stab wounds and cross-infection. The rear end of the casing seat 33 is provided with an L-shaped locking slot 48 , and the front end of the recovery cylinder 50 is provided with a cylindrical locking block 58 , and the locking block 58 is engaged with the locking slot 48 . The extension tube 36 is provided with a positive pressure stop clip 37, please refer to Figure 18, the positive pressure stop clip 37 is composed of a lock part 60 and a snap part 61, the main body of the positive pressure stop clip is U-shaped, with two On the opposite side walls, the snap part 61 is formed by one of the side walls, and the lock part 60 is formed by bending the upper end of the other side wall. The slope of the buckle 61 is formed. The middle parts of the two side walls of the main body are respectively provided with briquetting blocks 63, 64. The briquetting blocks 63, 64 are wedge-shaped. A through hole 66 is provided at the position, and the through holes 65 and 66 are used for passing the extension pipe 36 . The advantage of the positive pressure flow stop clip 37 of this structure is that it can be operated with one hand to cut off the liquid passage. The pressing blocks 63, 64 on the positive pressure flow stop clip 37 are wedge-shaped. The pressure can automatically push the liquid in the extension tube 36 forward. This unique design can prevent blood from flowing back into the indwelling needle, thereby reducing the clogging rate of the indwelling needle to zero.

The use of this product is basically the same as that of the traditional indwelling needle. When using, insert the soft sheath 32 and the needle core 31 into the blood vessel together. When the soft sheath 32 has completely entered the blood vessel, withdraw the needle core 31, The soft cannula 32 is left in the blood vessel for infusion or blood withdrawal. After the indwelling needle punctures successfully, the needle handle seat 39 is moved backward through the needle handle 34, and the needle core 31 is withdrawn into the recovery cylinder 50, and the pin 53 and the pin 54 enter the socket 57, and the barb 55 on the pin 53 and After the barb 56 on the pin 54 utilizes the wedge-shaped slope to cross the limit groove 47, it is hooked in the limit groove 47, and the needle core 31 is locked. Since the recovery cylinder 50 is long enough, it can fully accommodate the needle core 31, so the needle core 31 is locked. The needle tip of the core 31 will not be exposed, thereby protecting the safety of patients, medical staff and other relevant personnel, and avoiding stab wounds and cross-infection. After the needle core 31 is locked, screw the recovering cylinder 50 so that the block 58 at the front end of the recovering cylinder 50 withdraws from the draw-in slot 48 at the rear end of the sleeve base 33, and the recovery cylinder 50 can be separated from the sleeve base 33.

This product can be used for infusion, please refer to Fig. 34 and Fig. 35. During infusion, it is only necessary to connect the infusion set connector 43 with the needle-free puncture connector 15 of this product through a screw thread.

Please refer to FIG. 36 and FIG. 37 , the indwelling needle 30 is packaged in a transparent plastic box 59 , and the top of the transparent plastic box 59 is provided with a sealing film 69 . Please refer to FIG. 38 and FIG. 39 , the blood collection needle 40 is packaged in a transparent plastic box 67 , and a sealing film 68 is provided on the surface of the transparent plastic box 67 .

Claims (7)

1. a safety blood sampling transfusion indwelling needle assembly, comprise puncture needle and casing seat, puncture needle is made up of nook closing member and soft tube, casing seat is connected to the rear portion of soft tube, in casing seat, be provided with batching pig, the rear end of nook closing member is provided with needle handle seat, on needle handle seat, be connected with needle handle, the front end of nook closing member runs through batching pig, inserts in soft tube, and casing seat is with by-pass port, by-pass port is connected with extension tube, it is characterized in that: in described extension tube, be provided with positive pressure fluid stopping clamp, the afterbody tube chamber of extension tube is straight-through tube chamber, and this tube chamber is connected with needleless puncture joint.

2. a kind of safety blood sampling transfusion indwelling needle assembly as claimed in claim 1, it is characterized in that: the outer setting of described tube chamber has external screw thread screw thread, described needleless puncture joint is provided with female thread screw thread, and this needleless puncture joint is connected by the mode of being spirally connected with tube chamber.

3. a kind of safety blood sampling transfusion indwelling needle assembly as claimed in claim 1, it is characterized in that: this assembly also includes blood taking needle, blood taking needle by stinging hatpin, hold syringe, infusion apparatus joint forms, holding syringe is cylindrical shape, its front end is provided with centre bore seat, described thorn hatpin is arranged on the inside of holding syringe, and infusion apparatus joint is arranged on the outside of holding syringe, and thorn hatpin, infusion apparatus joint is all affixed with the centre bore seat of holding syringe.

4. a kind of safety blood sampling transfusion indwelling needle assembly as claimed in claim 1, it is characterized in that: this assembly also includes recovery cylinder, the rear end of recovery cylinder is provided with plug, the outer wall of recovery cylinder is provided with guide groove, on needle handle seat, be fixed with the slide plate coordinating with guide groove, the afterbody of needle handle seat arranges pin, on pin with barb, on plug, be provided with jack, jack inwall is provided with annular stopper slot, the rear end of described casing seat is provided with L shaped draw-in groove, and the front end of recovery cylinder is provided with columniform fixture block, and this fixture block becomes clamping to coordinate with described draw-in groove.

5. safety as claimed in claim 3 blood sampling transfusion indwelling needle assembly, is characterized in that: described in hold syringe surface be provided with fin.

6. safety blood sampling transfusion indwelling needle assembly as claimed in claim 3, is characterized in that: the outer setting of described thorn hatpin has blood resistance unit.

7. the blood sampling of the safety as described in claim l transfusion indwelling needle assembly, it is characterized in that: described positive pressure fluid stopping clamp forms by latch part with by buckle portion, the main body of positive pressure fluid stopping clamp is U-shaped, there are two relative sidewalls, formed by one of them sidewall by buckle portion, latch part is made up of the bending of another sidewall upper, the free end of latch part is provided with latch hook, latch hook is by forming towards the slope by buckle portion, the middle part of two sidewalls of main body is provided with briquetting, briquetting is wedge shape, and the bending of main body upper end and back bending place of lower end are provided with through hole.

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