CN107802271A - Blood sampling remaining needle and application method - Google Patents

Abstract

The application of the present invention discloses an indwelling needle for blood collection, which includes a blood collection assembly, a three-way pipe and a steel needle holder. The blood collection assembly includes a blood collection needle holder. The puncture needle inserted into the isolation plug, the blood collection needle is connected with the puncture needle, and the blood collection needle seat is slidably and detachably connected with the rear end of the main pipe; the three-way pipe includes the main pipe and the side pipe, and the front end of the main pipe is connected with a puncture hose; The isolation plug, the side tube is connected with a liquid sealing tube, and the sealing liquid clamp is arranged on the outside of the liquid sealing tube; the steel needle is arranged on the steel needle holder; the valve for blocking the puncture hose is arranged on the far inside of the puncture hose, and the valve is provided with a valve for Unclog the opening of the puncture hose under pressure, and the steel needle passes through the isolation plug, the main pipe of the tee, the puncture hose and the opening in sequence. The present invention also discloses a method for using the above indwelling needle for blood collection. Compared with the prior art, the indwelling needle for blood collection greatly reduces the workload of medical personnel and also reduces the suffering of patients.

Description

Indwelling needle for blood collection and method of use

technical field

The invention belongs to the technical field of medical devices, and specifically discloses an indwelling needle for blood collection and a use method thereof.

Background technique

Doctors usually rely on the results of blood tests to diagnose a patient's disease. Therefore, under normal circumstances, when a patient goes to a hospital for an examination or to see a doctor, he needs to take a blood test first. According to the test results and combined with the patient's symptoms, the doctor can make a scientific diagnosis of his condition. Blood collection is needed during the patient’s examination or seeing a doctor. There are two main blood collection methods at present. One is to use a syringe to puncture the patient’s blood vessel to draw blood, and then inject the artificially extracted blood into the test tube for testing; the other The patient's blood vessels are punctured through blood collection, and then the other side of the blood collection needle is inserted into the blood collection tube, and the blood is drawn out of the patient's body by using the negative pressure in the blood collection tube. The above two methods of blood collection are all one-time blood collection. After one blood collection is completed, the blood collection needle or syringe is about to be discarded.

For ordinary physical examination or simple disease diagnosis, only one blood collection is required, and the above two blood collection methods can be used. For some complex physical examinations, such as multiple physical examinations, or the diagnosis of major diseases, multiple blood collections are required at different times during the examination. If the above two methods are still used to collect blood, the patient needs to be punctured multiple times; it is more cumbersome for the medical staff, and the workload is greatly increased; for the patient, the blood vessel is punctured many times, which will cause excessive damage, and the patient is also more painful . At the same time, multiple punctures are likely to cause infection, which is very unfavorable to the patient's health; if infection occurs, it may also affect the blood test results and mislead the doctor to diagnose the patient. In addition, blood collection needles or syringes must be discarded every time blood is collected, resulting in waste of resources and pollution of the environment.

For this reason, in the actual blood collection in the hospital, when there is a need for multiple blood collections to the patient in different periods, the indwelling needle used for intravenous infusion is used for blood collection to avoid multiple punctures to the patient. When using an indwelling needle for blood collection, each time blood collection needs to use a syringe to puncture the indwelling needle, and then manually extract the blood and inject it into the test tube for testing. For the medical staff, the operation steps are not reduced, and there is still a large workload. At the same time, the syringe still has to be discarded after each blood draw, and the waste of resources has not improved. In the actual use process, it is also found that when the indwelling needle is not in use, it needs to use the infusion liquid to seal the liquid; the patient's continuous liquid will contact with the liquid, and some blood will be left in the three-way tube, which will cause the patient's physical discomfort. In addition, most of the liquid will be drawn out with the blood in the blood collected from the patient every time, and the liquid will affect the test results of the blood.

Contents of the invention

The purpose of the present invention is to provide an indwelling needle for blood collection to solve the problem of cumbersome operation and heavy workload for medical staff when the patient needs to take multiple blood collections at different time periods.

In order to achieve the above object, the basic solution of the present invention is: the indwelling needle for blood collection includes a blood collection assembly, a three-way pipe and a steel needle holder, the blood collection assembly includes a blood collection needle holder, a blood collection needle is provided on one side of the blood collection needle holder, and the blood collection needle The outer cover is provided with a blood collection needle cover; the three-way pipe includes a main pipe and a side pipe, the front end of the main pipe is connected with a puncture hose, and the outer sleeve of the puncture hose is provided with a sleeve; the rear end of the main pipe is provided with an isolation plug, and the side pipe is connected with a A liquid sealing tube, a liquid sealing clamp is provided outside the liquid sealing tube; a steel needle is provided on the steel needle frame, and a valve for blocking the puncture hose is provided inside the end of the puncture hose away from the main pipe, and a valve is provided on the valve There is an opening for dredging the puncture hose under pressure, and the steel needle passes through the isolation plug, the main pipe, the puncture hose, and the opening in sequence; the side of the blood collection needle seat away from the blood collection needle is provided with a puncture needle for inserting the isolation plug, The blood collection needle communicates with the puncture needle, and the side of the blood collection needle seat provided with the puncture needle is detachably connected to the rear end of the main pipe.

The front end and back end of the supervisor in the scheme represent the relationship between one end of the supervisor and the other end.

The working principle of this basic solution is: for patients who need multiple puncture blood collection, the indwelling needle for blood collection can be used during the first blood collection. The specific operation process is to pull out the sleeve of the puncture hose, use a steel needle to puncture the patient's vein, and the puncture hose will enter the patient's vein with the steel needle. After the venipuncture is completed, pull out the steel needle, discard the steel needle holder and the steel needle, and fix the three-way tube on the patient's body. Then inject the sealing liquid through the end of the sealing liquid tube. After the liquid fills the three-way tube, use the liquid sealing clamp to cut off the sealing liquid tube; the liquid and blood make the pressure difference on both sides of the valve no longer exist, and the valve is closed. Then the puncture needle is inserted into the isolation plug, and the blood collection component is slidably connected to the rear end of the main pipe.

When collecting the patient's blood, slide the blood collection assembly close to the three-way tube, the tip of the puncture needle will pass through the isolation plug and enter the three-way tube, and insert the blood collection needle into the vacuum blood collection tube. The puncture needle and the blood collection needle connect the three-way tube with the vacuum blood collection tube. Under the negative pressure of the vacuum blood collection tube, the opening of the valve is opened, and the blood enters the vacuum blood collection tube. When the blood in the vacuum blood collection tube reaches the required amount, the blood collection needle is pulled out of the vacuum blood collection tube. After a blood collection is completed, the sealing liquid is filled into the three-way tube again through the sealing liquid tube, so that there is no pressure difference between the blood and the liquid on both sides of the valve, so that the opening is closed. Simultaneously slide the blood collection assembly to keep it away from the three-way tube, the tip of the puncture needle will enter the isolation plug, and the three-way tube is sealed under the action of the isolation plug.

After a period of time, when the patient needs to collect blood again, the above-mentioned blood collection operation is repeated without performing venipuncture again. When the blood collection needle is inserted into the vacuum blood collection tube, there is no need to take off the blood collection needle cover, and the tip of the blood collection needle directly passes through the top of the blood collection needle cover and penetrates into the collection tube to collect blood. When the vacuum blood collection tube is pulled out, the tip of the blood collection needle retracts into the blood collection needle cover, and the blood collection needle cover seals the tip of the blood collection needle, preventing the blood collection needle from being stuck to a patient or medical staff, and also preventing the blood collection needle from being polluted.

The beneficial effect of this basic scheme is that: the indwelling needle for blood collection passes through the pressure of the blood and liquid on both sides of the valve to seal the opening, so that the blood will no longer flow into the three-way tube, and the blood will not flow into the three-way tube to make the patient feel uncomfortable. This indwelling device for blood collection is aimed at patients who need multiple blood collections, especially at different time periods, for blood testing. Only one blood vessel puncture is required, which greatly reduces the pain of the patient and is also very effective. Infection caused during blood sampling and puncture is beneficial for doctors to diagnose the patient's physical condition through blood test results, and is also beneficial for the patient's health. The indwelling device for blood collection is aimed at medical staff, especially for laboratories in hospitals that need to collect blood from patients for a long time. A patient only needs one puncture, which greatly reduces the workload of medical staff. After multiple blood collections, the indwelling needle for blood collection only needs to be discarded once without discarding other medical devices, which greatly saves resources and protects the environment. The use process of the indwelling needle for blood collection is very simple and convenient, overcomes the shortcomings in the existing blood collection process, and comprehensively improves the efficiency and safety of blood collection. Compared with the prior art, the indwelling needle for blood collection greatly reduces the workload of medical personnel and also reduces the suffering of patients.

Further, it also includes an elastic sleeve and an air bag, one end of the elastic sleeve is fixedly connected with the isolation plug, and the other end is provided with a baffle; the inside of the elastic sleeve is provided with a cavity, and the inner wall of the main pipe is embedded with a vent pipe, so The air bag is located in the main pipe, and the cavity and the air bag are communicated through a ventilation tube.

When taking blood with the indwelling needle for blood collection, slide the blood collection assembly close to the three-way tube. At this time, the blood collection assembly squeezes the elastic tube sleeve to compress it, and the air in the cavity is pressed into the three-way tube through the ventilation tube. In the air bag, the volume of the air bag increases to squeeze the liquid in the tee pipe. Before sliding the blood collection unit to make it close to the three-way tube, the liquid sealing clamp can be opened. At this time, the liquid in the three-way tube will flow back into the liquid sealing tube through the side tube under the extrusion of the air bag. After the liquid flows back into the liquid sealing tube Close the sealing clamp. This process can reduce the liquid used for liquid sealing from being drawn into the vacuum blood collection tube, and avoid the influence of too much liquid in the vacuum blood collection tube from affecting the blood detection.

Further, the elastic sleeve includes a bellows and a telescopic tube for steel needles or needles to pass through, one end of the bellows and the telescopic tube is sealed with the isolation plug, and the telescopic tube is located on the center line of the bellows, The ends of the bellows and telescopic tube away from the isolation plug are sealed and connected to the baffle.

The setting of the telescopic tube can make the needle pass through the elastic sleeve without leaking air from the elastic tube, so that all the gas in the elastic sleeve is pressed into the air bag, further reducing the liquid from entering the vacuum blood collection tube. The bellows has a simple structure, is convenient for design and manufacture, and is more suitable for the elastic tube sleeve in the indwelling needle for blood collection.

Furthermore, the bellows is made of elastic plastic, the baffle is slidably connected to the rear end of the main pipe, and the bellows is provided with a supporting elastic member. The corrugated pipe is made of elastic plastic, which can further improve the compression effect of the corrugated pipe, and the baffle plate and the rear end of the main pipe are slidably connected, so that the compression process of the baffle plate and the elastic sleeve can be more stable. The supporting elastic member can make the elastic sleeve automatically return to the original position after being compressed, without manually sliding the blood collection component to restore the position, which makes the operation of the blood collection retention needle easier.

Further, the rear end of the main pipe is symmetrically provided with two support plates, the support plates are provided with a card slot, and the blood collection needle seat is provided with a support bar that slides and engages with the card slot, and the blood collection needle seat A support block is provided on the top to facilitate the movement of the blood collection component. The setting of the support plate and the support block is convenient for sliding the blood collection component, and the setting of the card slot and the support rod realizes the detachable connection between the blood collection component and the rear end of the main pipe, and enables the sliding connection.

Further, the end of the pole away from the blood collection needle seat is provided with a spherical restricting plug, and the bottom of the slot is a circular groove slidingly connected with the pole. Limiting plugs and circular grooves prevent the blood collection assembly from slipping when sliding on the rear end of the main tube.

Further, the inner wall of the main pipe and the side pipe are hingedly provided with a rotating plate, and the end of the rotating plate away from the hinge is located in the side pipe. When using the indwelling needle for blood collection to collect blood, the baffle can prevent the liquid from passing through the front end of the main tube to cause discomfort to the patient; the liquid basically enters the liquid sealing tube through the side pipe, further reducing the liquid entering the vacuum blood collection tube.

Further, the steel needle holder is provided with a vertical groove, and the outer wall of the rear end of the main pipe is provided with a convex strip, and the steel needle holder and the rear end of the main pipe are engaged with the convex strip through the vertical groove; the steel needle holder is provided with a handle outside, The blood collection needle cover is covered with a sheath. It is convenient to connect and disassemble the steel needle holder and the rear end of the main pipe.

Another object of the present invention is to provide a method for using the above-mentioned indwelling needle for blood collection, comprising the following steps:

(1) Preparation: Disinfect the blood collection site of the patient, and tie a tourniquet above the disinfection area; remove the sleeve on the indwelling needle for blood collection;

(2) Puncture: Hold the steel needle holder, tighten the skin, and use the steel needle to complete the venipuncture;

(3) Withdrawing the steel needle: withdraw the steel needle from the patient's blood vessel, slide the convex strip on the main tube out of the vertical groove, remove the steel needle holder from the three-way pipe and discard it;

(4) Fix the three-way tube: fix the three-way tube on the patient's body with adhesive tape, remove the tourniquet; then inject the liquid for sealing liquid from the end of the liquid-sealing tube, and the liquid fills the three-way tube;

(5) Install the blood collection component: pass the needle through the telescopic tube and insert it into the isolation plug, and insert the support rod into the circular groove through the slot;

(6) Blood collection preparation: Apply force to the branch to make it close to the three-way pipe, the elastic sleeve is squeezed so that the gas in the cavity is pressed into the air bag located in the three-way pipe through the ventilation pipe, and the volume of the air bag increases to three-way. The liquid in the through pipe is squeezed; the baffle will prevent the liquid from entering the human body from the puncture hose through the front end of the main pipe, and the liquid will enter the liquid sealing tube through the side pipe after being squeezed. The liquid seal tube of the machine is stuck, so that the liquid cannot flow;

(7) Blood collection: While the elastic sleeve is squeezed, the tip of the puncture needle passes through the isolation plug and enters the three-way tube, pulls out the outer sheath of the blood collection needle sleeve, inserts the blood collection needle into the vacuum blood collection tube, and the vacuum blood collection tube Under the effect of negative pressure, the blood is pumped into the vacuum blood collection tube through the puncture hose, the main tube, the puncture needle and the blood collection needle;

(8) Tube sealing: When the blood in the vacuum blood collection tube is about to reach the required amount, pull out the blood collection needle from the vacuum blood collection tube, and open the liquid sealing clip to let the liquid flow into the tee tube to seal the tube, and put the sheath on the blood collection needle At the same time, no force is applied to the support block. Under the action of the supporting elastic member, the elastic sleeve is no longer compressed, the air in the airbag flows into the cavity through the ventilation tube, and the blood collection component is kept away from the tee under the action of the elastic sleeve. tube, the tip of the lancet is retracted into the isolation plug;

(9) Blood collection again: Repeat steps (6) (7) and (8) in sequence to complete blood collection again.

The beneficial effect of the method of using the indwelling needle for blood collection is: in this method of use, during the process of pushing the tip of the puncture needle into the three-way tube during blood collection, the liquid used to seal the liquid in the three-way tube flows back to the side tube, thereby reducing The liquid that enters the vacuum blood collection tube, so that the blood test results are more accurate. In the process of multiple blood collections, the use method only produces the waste of the indwelling needle for one time of blood collection, which greatly reduces the waste of resources and protects the environment. The use method does not require puncture for the patient, and the blood collection process will not cause serious discomfort, which effectively protects the patient's health. For the medical personnel, the use method does not need multiple punctures, and the operation is relatively simple, which greatly reduces the workload.

Further, in step (6), the index finger and middle finger are attached to the side of the support plate close to the tee pipe, the thumb is attached to the side of the support block away from the tee pipe, and force is applied by the thumb, index finger and middle finger to make The thumb is close to the forefinger and middle finger to realize the application of force on the support block, so that the support block is close to the tee pipe. The operation of the method is simpler, more convenient and labor-saving.

Description of drawings

Fig. 1 is a schematic structural view of the indwelling needle for blood collection of the present invention before use;

Fig. 2 is a schematic diagram of the structure after puncture by the indwelling needle for blood collection of the present invention;

Fig. 3 is the structural sectional view of Fig. C-C place;

Fig. 4 is the enlarged view of place A in Fig. 2;

Fig. 5 is a view to the rear side of the main pipe in the B direction in Fig. 2;

Fig. 6 is a schematic structural view of the blood collection assembly.

Detailed ways

The present invention will be described in further detail below by means of specific embodiments:

The reference signs in the accompanying drawings include: blood collection needle holder 10, support rod 101, restriction plug 102, blood collection needle 11, blood collection needle cover 12, sheath 13, puncture needle 14, support block 15, main pipe 20, isolation plug 21, Air bag 22, ventilation tube 23, support plate 24, card slot 241, circular slot 242, rotating plate 25, puncture hose 30, valve 31, opening 311, sleeve 32, side tube 40, sealing liquid tube 41, sealing liquid Clip 42, steel needle frame 50, steel needle 51, elastic sleeve 60, cavity 61, bellows 62, telescopic tube 63, baffle plate 64, supporting elastic member 67.

As shown in Figures 1 and 2, the indwelling needle for blood collection includes a blood collection assembly, an elastic sleeve 60, an air bag 22, a three-way pipe and a steel needle 51 frame 50; the three-way pipe includes a main pipe 20 and a side pipe 40, and the main pipe 20 The front end is connected with a puncture hose 30, and the puncture hose 30 is covered with a sleeve 32; the rear end of the main pipe 20 is provided with an isolation plug 21, and the side pipe 40 is connected with a sealing liquid tube 41, and the sealing liquid tube 41 is provided with a sealing liquid Clip 42. As shown in Figure 3, the valve 31 that blocks the puncture hose 30 is provided in the left end of the puncture hose 30, and the valve 31 is provided with an opening 311 for dredging the puncture hose 30 under pressure; When there is a pressure difference, the opening 311 opens to dredge the puncture hose 30 , and when there is no pressure difference between the left and right sides of the valve 31 , the opening 311 closes and the puncture hose 30 is blocked. As shown in Figure 6, the blood collection assembly includes a blood collection needle holder 10, a blood collection needle 11 is fixed on the right side of the blood collection needle holder 10, a lancet 14 is fixed on the left side of the blood collection needle holder 10, and the blood collection needle 11 communicates with the puncture needle 14; A sealed blood collection needle cover 12 made of rubber is placed, and the outside of the blood collection needle cover 12 is covered with a sheath 13 for protecting the blood collection needle cover 12 from contamination. The steel needle 51 frame 50 is provided with a steel needle 51, and the steel needle 51 passes through the elastic sleeve 60, the isolation plug 21, the main pipe 20 of the three-way pipe, the puncture hose 30, and the opening 311 in sequence.

As shown in FIG. 4 , the elastic sleeve 60 includes a bellows 62 , a baffle 64 , and a telescopic tube 63 for passing the steel needle 51 or the needle 14 , wherein the bellows 62 is made of elastic plastic. The telescopic tube 63 is located on the center line of the bellows 62 , the left ends of the bellows 62 and the telescopic tube 63 are sealed to the isolation plug 21 , and the right ends of the bellows 62 and the telescopic tube 63 are sealed to the baffle 64 . The baffle 64 is slidably connected to the rear end of the main pipe 20 , so that the elastic sleeve 60 can slide in the rear end of the main pipe 20 , and the inside of the bellows 62 is a sealed cavity 61 . The bellows 62 is provided with a supporting elastic member 67. In this embodiment, the supporting elastic member 67 uses a supporting spring whose diameter is smaller than the diameter of the bellows 62 and greater than the diameter of the telescopic tube 63. The supporting spring is sleeved in the bellows 62 , and is located in the cavity 61. There are two airbags 22, one side of the airbag 22 is fixed to the inner wall of the main pipe 20, the inner wall of the main pipe 20 is embedded with a vent pipe 23, and the air bag 22 communicates with the cavity 61 of the bellows 62 through the vent pipe 23. The inner wall of the main pipe 20 and the side pipe 40 are hinged and provided with a rotating plate 25, and the end of the rotating plate 25 away from the hinge is located in the side pipe 40. The rotating plate 25 is mainly used to relieve the pressure in the puncture hose 30 when the pressure is generated in the three-way pipe. .

As shown in Figure 5, the rear end of the main pipe 20 is symmetrically provided with two support plates 24, the support plates 24 are provided with a slot 241, the bottom of the slot 241 is provided with a circular slot 242, and the opening 311 of the slot 241 is bottomed out. The width first decreases and then increases. The blood collection needle holder 10 is provided with a support rod 101 that slides and engages with the card slot 241. The left end of the support rod 101 is a spherical restriction plug 102. 101 slips off from the circular groove 242. The blood collection assembly is detachably installed on the rear end of the main pipe 20 through the support rod 101, and through the sliding of the support rod 101 in the circular groove 242, the blood collection assembly can slide left and right after being connected with the rear end of the main pipe 20. A support block 15 is fixed on the outer lower end of the blood collection needle holder 10, and the support block 15 is convenient for sliding the blood collection assembly along the main tube 20 when using the indwelling needle for blood collection. The steel needle 51 frame 50 is provided with a vertical groove, and the outer wall of the main pipe 20 rear end is provided with a convex strip, and the steel needle 51 frame 50 is connected with the convex strip through the vertical groove and the rear end of the main pipe 20; The handle and the blood collection needle cover 12 are covered with a sheath 13 .

The method for using the above-mentioned indwelling needle for blood collection comprises the following steps:

(1) Preparation: Select the blood vessel for blood collection from the patient, disinfect the blood collection site of the patient, and tie a tourniquet above the disinfection area; prepare the indwelling needle, adhesive tape, vacuum blood collection tube, and other blood collection equipment for blood collection , remove the sleeve 32 on the blood collection needle;

(2) Puncture: hold the handle part of the indwelling needle for blood collection, tighten the skin, use the steel needle 51 to puncture the patient's vein, insert the needle slowly at an angle of 25° between the steel needle 51 and the skin, and then insert the needle 0.2 cm, the puncture hose 30 will enter the patient's blood vessel along with the steel needle 51 to complete the venipuncture of the patient's blood vessel;

(3) Withdraw the steel needle 51: hold the steel needle 51 frame 50, withdraw the steel needle 51 from the patient's blood vessel, slide the convex strip on the main pipe 20 out of the vertical groove, remove the steel needle 51 frame 50 from the tee pipe and throw away;

(4) Fix the three-way tube: use adhesive tape to fix the three-way tube on the patient's body, take off the tourniquet; then inject the liquid for sealing the liquid from the end of the liquid-sealing tube 41, and the liquid is full of the three-way tube;

(5) Install the blood collection component: pass the needle 14 through the telescopic tube 63 and penetrate into the isolation plug 21, and insert the pole 101 into the circular groove 242 through the slot 241;

(6) Blood collection preparation: the index finger and middle finger are attached to the side of the support plate 24 close to the tee pipe, the thumb is attached to the side of the support block 15 away from the tee pipe, and force is applied through the thumb, index finger and middle finger to make the The thumb is close to the index finger and middle finger to apply force to the support block 15, so that the support block 15 is close to the tee pipe; the elastic sleeve 60 is squeezed so that the gas in the cavity 61 is pressed into the tee pipe through the ventilation pipe 23 In the air bag 22, the volume of the air bag 22 increases to squeeze the liquid in the three-way pipe; the baffle plate 64 will prevent the liquid from entering the human body from the puncture hose 30 through the front end of the main pipe 20, and the liquid will enter through the side pipe 40 after being squeezed The liquid sealing tube 41, at this time, use the liquid sealing clamp 42 to clamp the liquid sealing tube 41 near the side pipe 40, so that the liquid cannot flow;

(7) Blood collection: While the elastic sleeve 60 is squeezed, the tip of the lancet 14 passes through the isolation plug 21 and enters the three-way pipe, pulls out the outer sheath 13 of the blood collection needle sleeve 12, and inserts the blood collection needle 11 into the vacuum blood collection Inside the tube; the inside of the vacuum blood collection tube is in a vacuum state, and the vacuum blood collection needle 11 communicates with the inside of the three-way tube through the puncture needle 14 and the blood collection needle 11, which will generate negative pressure in the three-way tube, and the opening 311 on the valve 31 will open when the negative pressure is applied , the blood is pumped into the vacuum blood collection tube through the puncture hose 30, the supervisor 20, the puncture needle 14, and the blood collection needle 11;

(8) Tube sealing: When the blood in the vacuum blood collection tube reaches the required amount soon, the blood collection needle 11 is pulled out of the vacuum blood collection tube, and the liquid sealing clip 42 is opened to allow the liquid to flow into the three-way tube to seal the tube, and 13 sets of sheaths are sealed. Outside the blood collection needle cover 12, to protect the blood collection needle cover 12 from contamination; at the same time, no force is applied to the support block 15, and under the action of the supporting elastic member 67, the elastic tube cover 60 is no longer compressed, and the air bag 22 The air flows into the cavity 61 through the ventilation tube 23, and the blood collection component works under the action of the elastic sleeve 60.

Use it to move away from the three-way pipe, and the tip of the needle 14 is retracted into the isolation plug 21;

(9) Blood collection again: Repeat steps (6) (7) and (8) in sequence to complete blood collection again.

The indwelling needle for blood collection seals the opening 311 through the pressure of the blood and liquid on both sides of the valve 31, so that the blood will no longer flow into the three-way pipe, so as to prevent the blood from flowing into the three-way pipe and make the patient feel uncomfortable. This indwelling device for blood collection is aimed at patients who need multiple blood collections, especially at different time periods, for blood testing. Only one blood vessel puncture is required, which greatly reduces the pain of the patient and is also very effective. Infection caused during blood sampling and puncture is beneficial for doctors to diagnose the patient's physical condition through blood test results, and is also beneficial for the patient's health. The indwelling device for blood collection is aimed at medical staff, especially for laboratories in hospitals that need to collect blood from patients for a long time. A patient only needs one puncture, which greatly reduces the workload of medical staff. After multiple blood collections, the indwelling needle for blood collection only needs to be discarded once without discarding other medical devices, which greatly saves resources and protects the environment. The use process of the indwelling needle for blood collection is very simple and convenient, overcomes the shortcomings in the existing blood collection process, and comprehensively improves the efficiency and safety of blood collection. During the blood collection process, the indwelling needle for blood collection uses the sliding of the blood collection assembly to make the air flow between the elastic sleeve 60 and the air bag 22, so as to squeeze the liquid filled in the three-way pipe back into the side pipe 40, thereby reducing the sealing. The liquid used for the liquid is pumped into the vacuum blood collection tube to avoid too much liquid in the vacuum blood collection tube from affecting the blood test.

In this method of using the indwelling needle for blood collection, during the process of pushing the tip of the puncture needle 14 into the three-way tube during blood collection, the liquid used for sealing the liquid in the three-way tube flows back to the side tube 40, thereby reducing the risk of entering the vacuum blood collection tube. fluids to make blood test results more accurate. The use method of the indwelling needle for blood collection does not require puncture for the patient, the blood collection process will not cause serious discomfort, and effectively protects the health of the patient. For the medical personnel, the use method does not need multiple punctures, and the operation is relatively simple, which greatly reduces the workload.

What is described above is only an embodiment of the present invention, and common knowledge such as specific solutions and characteristics known in the solutions will not be described too much here. It should be pointed out that for those skilled in the art, without departing from the structure and method of the present invention, several modifications and improvements can also be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the present invention The effect of the implementation and the utility of the patent.

Claims (10)

1. blood sampling remaining needle, including blood collection assembly, three-way pipe and draw point frame, the blood collection assembly includes blood sampling needle stand, blood sampling Needle stand side is provided with blood taking needle, and blood taking needle set is equipped with outside blood taking needle；The three-way pipe includes supervisor and side pipe, the front end of supervisor Puncture flexible pipe is communicated with, hose overcoat is punctured and is provided with pipe sleeve；Batching pig is provided with the rear end of supervisor, side pipe is connected with dip tube, Sealing liquid is provided with outside dip tube to press from both sides；The draw point frame is provided with draw point, it is characterised in that the flexible pipe that punctures is away from one be responsible for End is internal to be provided with the valve for blocking and puncturing flexible pipe, and the valve, which is provided with, is used for the opening that dredging under stress punctures flexible pipe, institute State draw point and sequentially pass through batching pig, the supervisor of three-way pipe, puncture flexible pipe and opening；The side of the blood sampling needle stand away from blood taking needle Provided with the pricker for inserting batching pig, blood taking needle connects with pricker, and the blood sampling needle stand is provided with the side of pricker with supervisor's Slide and be detachably connected in rear end.

2. blood sampling remaining needle as claimed in claim 1, it is characterised in that also including the gentle capsule of elastic pipe sleeve, the elasticity One end of pipe sleeve is fixedly connected with batching pig, and the other end is provided with baffle plate；Cavity is provided with inside the elastic pipe sleeve, supervisor's inwall is embedding Provided with breather pipe, in supervisor, cavity is connected the air bag with air bag by breather pipe.

3. blood sampling remaining needle as claimed in claim 2, it is characterised in that the elastic pipe sleeve includes bellows and for steel The telescoping tube that pin or pricker pass through, one end of the bellows and telescoping tube are connected with septum seals, and the telescoping tube is located at On the center line of bellows, the described one end of bellows and telescoping tube away from batching pig is connected with guard seal.

4. blood sampling remaining needle as claimed in claim 3, it is characterised in that the bellows is made up of elastoplast, described Baffle plate is slidably connected with supervisor rear end, and support elastic component is provided with the bellows.

5. the blood sampling remaining needle as described in claim any one of 1-4, it is characterised in that the rear end outer symmetrical of the supervisor Provided with two pieces of support plates, the support plate is provided with neck, and the blood sampling needle stand is provided with the pole being slidably fastened with neck, described to adopt Blood needle stand is provided with the bearing piece of blood collection assembly easy to remove.

6. blood sampling remaining needle as claimed in claim 5, it is characterised in that the one end of the pole away from blood sampling needle stand is provided with Spherical limitation plug, the neck bottom are the circular trough being slidably connected with pole.

7. blood sampling remaining needle as claimed in claim 6, it is characterised in that supervisor's inwall is relative with side pipe to locate be hinged set There is flap, the flap is located in side pipe away from be hinged one end.

8. blood sampling remaining needle as claimed in claim 7, it is characterised in that the draw point frame is provided with vertical slot, is responsible for rear end Outer wall be provided with raised line, draw point frame is connected together with supervisor rear end by vertical slot and raised line；The draw point frame is externally provided with handle, The blood sampling needle guard overcoat has sheath.

9. the application method of the blood sampling remaining needle described in a kind of claim 8, it is characterised in that comprise the following steps：

(1) prepare：Patient's blood sampling site is carried out disinfection, and tourniquet is tied above sterilization scope；By blood sampling remaining needle On pipe sleeve remove；

(2) puncture：Hand-held draw point frame, takes off tight skin, and venipuncture is completed using draw point；

(3) draw point is moved back：Draw point is exited from patient's blood vessel, the raised line on supervisor is skidded off into vertical slot, draw point frame is from three-way pipe Pull down and abandon；

(4) fixed three-way pipe：Three-way pipe is fixed on patient body using adhesive plaster, removes tourniquet；Then from dip tube The liquid of sealing liquid is injected in end, and liquid is full of three-way pipe；

(5) blood collection assembly is installed：Pricker through telescoping tube and is pierced into batching pig, pole is caught in circular trough through neck；

(6) blood sampling prepares：It is made close to three-way pipe to bearing piece force, elastic pipe sleeve, which is extruded, makes the gas in its cavity through ventilation Pipe is pressed into the air bag of three-way pipe, and the increase of air bag volume is extruded the liquid in three-way pipe；Baffle plate will stop Front end of the liquid through supervisor enters human body from flexible pipe is punctured, and liquid can enter dip tube through side pipe after being squeezed, now use The dip tube that sealing liquid folder will be close at side pipe is blocked, and prevents liquid from flowing；

(7) take a blood sample：While elastic pipe sleeve is extruded, the tip of pricker enters in three-way pipe through batching pig, by blood taking needle Sheath outside set is extracted, and blood taking needle is inserted in vacuum blood collection tube, the suction function of vacuum blood collection tube, and blood is soft through puncturing Pipe, supervisor, pricker, blood taking needle are evacuated in vacuum blood collection tube；

(8) tube sealing：When blood in vacuum blood collection tube reaches aequum soon, blood taking needle is extracted into vacuum blood collection tube, and open Sealing liquid folder, which flows liquid into, carries out tube sealing in three-way pipe, sheath is enclosed on outside blood sampling needle guard；Bearing piece application is not acted on simultaneously Power, in the presence of elastic component is supported, elastic pipe sleeve is no longer compressed, and the air in air bag is flowed into cavity through breather pipe, blood sampling Component in the presence of elastic pipe sleeve away from three-way pipe, in the sophisticated retraction batching pig of pricker；

(9) take a blood sample again：Repeat to operate (6) (7) (8) step successively, completion is taken a blood sample again.

10. the application method of blood sampling remaining needle as claimed in claim 9, it is characterised in that in step (6), forefinger is with Finger is bonded with support plate close to the side of three-way pipe, and thumb is bonded with side of the bearing piece away from three-way pipe, passes through thumb, forefinger Exerted a force with middle finger, thumb is realized close to forefinger and middle finger and active force is applied to bearing piece, make bearing piece close to three-way pipe.