CN210844676U - Remaining needle helpful for preventing thrombosis - Google Patents

Abstract

The scheme is that the indwelling needle which is helpful for preventing thrombosis comprises a needle seat, a needle handle, a puncture needle, a soft needle and a transfusion tube, wherein one end of the soft needle is communicated with a cavity of the needle seat, two sliding grooves are arranged in the soft needle far away from the end of the needle seat, and a liquid passing hole which can at least accommodate the puncture needle to pass through is arranged between the two sliding grooves; two sliding blocks matched with the sliding grooves are respectively arranged in the two sliding grooves, elastic pieces are respectively arranged between the two sliding blocks and the inner wall of the soft needle, one of the two sliding blocks is an electromagnet sliding block, the other sliding block is a permanent magnet sliding block, the polarities of the opposite ends of the electromagnet sliding block and the permanent magnet sliding block are opposite, and the electromagnet sliding block is connected with a battery through a lead with a switch; medical personnel accessible combined floodgate power and electromagnet slider's wire on the switch realize electromagnet slider and permanent magnet slider's absorption to the closed liquid hole of crossing that holds treatment liquid medicine or negative pressure blood return and pass through, thereby effectively prevent the formation of thrombus after the infusion finishes.

Description

Remaining needle helpful for preventing thrombosis

Technical Field

The utility model belongs to the technical field of infusion set, concretely relates to help preventing thrombus formation's needle of keeping somewhere.

Background

When the intravenous infusion is performed for more than two times, the intravenous infusion is performed by adopting an indwelling needle, the pain of a patient caused by repeated venipuncture and the fear of injection can be reduced by using the indwelling needle, the anxiety of parents is relieved, and the intravenous infusion is convenient for clinical medication, so that the intravenous infusion is widely applied clinically; the venous indwelling needle can be used for conventional venous transfusion and can be used for discontinuously sampling blood for multiple times, so that the pain of a patient caused by repeated puncture is avoided, the vein of the patient is protected, and the working efficiency of a nurse can be improved.

The existing indwelling needle adopts a clamp to isolate an infusion tube from the outside for the first time after infusion, at the moment, the vein returns blood due to negative pressure, and the returned blood forms thrombus blocking tubes in the indwelling needle, so that the length of indwelling time is controversial, and health administration departments, quality control departments of hospitals and indwelling needle manufacturers advocate that the indwelling time is not more than 3-4 days.

Thrombolysis is firstly carried out after thrombus blockage before next intravenous injection, and for patients with thrombus formation in a dialysis access, the main treatment scheme is as follows: a. the scheme a and the scheme b belong to operation, need to be developed under aseptic conditions such as an operating room and have invasive injury, and the scheme c is particularly suitable for early thrombosis and can obtain exact effect at the early stage of tremor reduction or disappearance. The treatment principle of the scheme c is contact thrombolysis treatment, the effect is far better than that of whole-body system thrombolysis, the bleeding risk is low, the dose of thrombolysis medicine is low, and the like.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem, the utility model provides a help preventing the needle of keeping somewhere of thrombus formation can effectively prevent the formation of thrombus.

In order to realize the purpose, the utility model discloses the technical scheme who takes is:

an indwelling needle which is helpful to prevent thrombosis comprises a needle seat, a needle handle, a puncture needle, a soft needle and a transfusion tube;

the needle seat is connected to the needle handle in a sliding manner, the soft needle is sleeved on the puncture needle, the puncture needle is fixed on the needle seat, a cavity is formed in the needle seat, and the infusion tube is communicated with the cavity;

one end of the soft needle is communicated with the cavity of the needle seat, two sliding chutes are arranged in the soft needle far away from the end of the needle seat, and a liquid passing hole which can at least accommodate the puncture needle to pass through is arranged between the two sliding chutes; two sliding blocks matched with the sliding grooves are respectively arranged in the two sliding grooves, elastic pieces are respectively arranged between the two sliding blocks and the inner wall of the soft needle, one of the two sliding blocks is an electromagnet sliding block, the other sliding block is a permanent magnet sliding block, the polarities of opposite ends of the electromagnet sliding block and the permanent magnet sliding block are opposite, and the electromagnet sliding block is connected with a battery through a lead with a switch.

Furthermore, the indwelling needle which helps to prevent thrombosis further comprises a dressing changing device; two ends of the infusion tube are respectively communicated with the cavity and the dressing change device;

the dressing change device comprises a fixed seat and a rotary head, wherein a sealed first cavity is formed between the fixed seat and the rotary head, a sealed second cavity is arranged in the rotary head, and the fixed seat is provided with a communicating first cavity which is separated by 120⁰A drain pipe and two feed liquor pipes that set up, wherein drain pipe and transfer line intercommunication are equipped with a clip on two feed liquor pipes respectively, the fixing base inner face of a drain pipe and two feed liquor pipes and first cavity intercommunication on be equipped with the boss respectively, be equipped with one end intercommunication second cavity on the turn round, the other end extends to and supports to the fixing base inner face and be separated by 120 respectively in and to support into first cavity and support⁰The three liquid guide channels are arranged, and the three liquid guide channels can be communicated with the liquid outlet pipe and the two liquid inlet pipes by rotating the rotating head.

Further, the indwelling needle helpful for preventing thrombosis is characterized in that the top of the needle base is provided with an anti-acupuncture device, and the puncture needle is arranged on the anti-acupuncture device and penetrates through the cavity of the needle base.

Furthermore, foretell is favorable to preventing the needle of keeping somewhere of thrombus formation, it is equipped with three instruction arrow heads to correspond three drain channel direction on the bull head, corresponds on the fixing base a drain pipe and two feed liquor pipe directions be equipped with three alignment lines.

Further, foretell be favorable to preventing the needle of keeping somewhere of thrombus formation, transfer line and drain pipe adopt threaded connection, the transfer line disposes the heparin cap, and it is used for the sealed of transfer line after the infusion finishes.

Further, the permanent magnet slider is made of a neodymium iron boron Nd2Fe14B rare earth permanent magnet material, a SmCo samarium cobalt permanent magnet material, an AlNiCo alNiCo permanent magnet material or a ferrite permanent magnet material, and the chute is made of a plastic or stainless steel material.

Further, the indwelling needle which is helpful for preventing thrombosis is characterized in that the needle pulling device is connected to the top end of the needle puncture preventing device and provided with an inner cavity, and the top of the puncture needle penetrates through the inner cavity.

Furthermore, foretell helps preventing the needle of keeping somewhere of thrombus formation, still be equipped with No. two clips on the transfer line, still be equipped with horizontal pole, telescopic link and spacing hole on the commentaries on classics head, wherein telescopic link one end articulates on the horizontal pole, and the other end can stretch into in the spacing hole.

Furthermore, the remaining needle helpful for preventing thrombosis is characterized in that the rotating head is further provided with a cross rod, a telescopic rod and a limiting hole, wherein one end of the telescopic rod is hinged to the cross rod, and the other end of the telescopic rod can extend into the limiting hole.

Further, in the indwelling needle for assisting in preventing thrombus formation described above, the elastic member is a tension spring.

The embodiment of the utility model provides a beneficial effect lies in: after the indwelling needle is placed into the venous blood vessel for transfusion, the electromagnet slider and the permanent magnet slider can be adsorbed by the switch on the lead of the switch-on power supply and the electromagnet slider, so that a liquid passing hole for containing therapeutic liquid medicine or negative pressure blood return is sealed, blood cannot enter the indwelling needle after the transfusion is stopped, and thrombus in the soft needle can be effectively prevented from forming.

Drawings

FIG. 1 is a schematic structural view of an indwelling needle for assisting in the prevention of thrombosis according to the present invention;

FIG. 2 is a front view of an indwelling needle dressing change device which helps prevent thrombosis;

FIG. 3 is a top view of an indwelling needle dressing change device which helps prevent thrombosis in accordance with the present invention;

FIG. 4 is a cross-sectional view taken along the plane B-B in FIG. 2;

fig. 5 is a cross-sectional view taken along the plane a-a in fig. 2.

Reference numerals in the drawings of the specification include: the needle base 1, the cavity 1a, the puncture-proof device S, the needle handle 2, the puncture needle 3, the infusion tube 4, the medicine changing device 5, the fixed base 50, the rotary head 51, the first cavity 52, the second cavity 53, the liquid guide channel 54, the boss 55, the first clamp 56, the liquid outlet tube 5a, the liquid inlet tube 5b, the indication arrow 511, the alignment line 512, the soft needle 6, the chute 7, the liquid passing hole 8, the electromagnet slide 90, the permanent magnet slide 91, the elastic part 10, the battery 11, the heparin cap 12, the needle pulling device 13, the second clamp 14, the cross rod 15, the telescopic rod 16 and the limiting hole 17.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1: with reference to FIG. 1

The scheme provides an indwelling needle which is helpful for preventing thrombosis, and mainly comprises a needle seat 1, a needle handle 2, a puncture needle 3, a soft needle 6 and a transfusion tube 4;

wherein the needle seat 1 is connected with the needle handle 2 in a sliding way, the soft needle 6 is sleeved on the puncture needle 3, the puncture needle 3 is fixed on the needle seat 1, the inside of the needle seat 1 is provided with a cavity 1a, and the infusion tube 4 is communicated with the cavity 1 a;

one end of the soft needle 6 is communicated with the cavity 1a of the needle seat 1, two sliding chutes 7 are arranged in the soft needle 6 far away from the end of the needle seat 1, and a liquid passing hole 8 which can at least accommodate the puncture needle 3 to pass through is arranged between the two sliding chutes 7; two sliding blocks which are embedded with the sliding grooves 7 are respectively arranged in the two sliding grooves 7, elastic parts 10 are respectively arranged between the two sliding blocks and the inner wall of the soft needle 6, one of the two sliding blocks is an electromagnet sliding block 90, the other sliding block is a permanent magnet sliding block 91, the polarities of opposite ends of the electromagnet sliding block 90 and the permanent magnet sliding block 91 are opposite, and the electromagnet sliding block 90 is connected with a battery 11 through a lead with a switch.

The Chinese nursing society advocates the use of indwelling needle infusion, suggests that 2 times of infusion treatment all use indwelling needles, because it causes the patient inconvenient activity in patient's venous blood vessel to keep somewhere pjncture needle 3, still have certain danger and injury latent factor, therefore "steel needle zero tolerance" has been advocated in demonstration hospital at present and sets up soft needle 6 in pjncture needle 3 outside, penetrate soft needle 6 in patient's vein together during the puncture, then, the mode of keeping somewhere needle of pulling out pjncture needle 3 is present mainstream, soft needle 6 has the compliance, after putting into patient's vein, patient's slight activity is not influenced, furthest reduces the risk latent to the patient.

The venous indwelling needle is blocked because blood flows back into the indwelling needle sleeve, blood coagulation substances such as blood platelets in the blood coagulate and thrombus is formed in the soft needle 6 with low flow rate, and the blockage of the tube is prevented by a tube sealing technology in order to ensure that the sleeve can be repeatedly used, a series of tools, medicines, operation technologies, and the standards are specially developed. "tube sealing" has become a term of art in medical and medical care. The current standard method of tube sealing is to use normal saline or heparin tube sealing liquid to inject into the sleeve to seal the tube, and the principle is that the normal saline or other tube sealing liquid is used as working liquid to occupy the space in the sleeve so that blood and blood coagulation components thereof can not enter the sleeve; secondly, the physiological saline in the sleeve can dilute the entered blood coagulation substance, and the blood coagulation and the thrombosis are delayed. But the effect is still not very desirable.

When the device is adopted, firstly, the puncture needle 3 passes through the liquid passing hole 8 between the two sliding blocks in the soft needle 6, and the puncture needle 3 extends out of the soft needle 6; the puncture needle 3 and the soft needle 6 are inserted into the vein of the patient together, and then the puncture needle 3 is pulled out to keep the soft needle 6 in the vein of the patient; at the moment, the infusion tube 4 supplies the therapeutic liquid medicine into the cavity 1a of the needle seat 1, and then when the puncture needle 3 is pulled out, the therapeutic liquid medicine enters the soft needle 6 from the cavity 1a and enters the vein vessel of the patient through the liquid passing hole 8, so as to realize the venous infusion of the indwelling needle; after the transfusion is finished, the liquid supply of the liquid inlet pipe 5b is stopped, then a switch connected with a lead of the electromagnet sliding block 90 is switched on, at the moment, the electromagnet sliding block 90 is converted into a magnetic material, then the permanent magnet sliding block 91 is attracted, when the free two ends of the electromagnet sliding block 90 and the permanent magnet sliding block 91 are attracted by magnetism, the elastic part 10 is stretched, the liquid passing hole 8 is blocked, at the moment, the venous blood cannot return to the soft needle 6 under negative pressure, so that the blood is prevented from entering the soft needle 6, and the blood is effectively prevented from forming thrombus in the indwelling needle soft needle 6.

When the intravenous infusion is needed again, the switch of the connecting wire between the electromagnet sliding block 90 and the battery 11 is closed, at the moment, the electromagnet sliding block 90 loses magnetism, the magnetic attraction force between the electromagnet sliding block and the permanent magnet disappears, the elastic part 10 storing energy after deformation recovers deformation, the elastic part 10 drives the electromagnet sliding block 90 and the permanent magnet sliding block 91 to separate, and therefore a liquid passing hole 8 for accommodating the passing of the treatment liquid medicine is formed between the electromagnet sliding block 90 and the permanent magnet sliding block 91, and the requirement of the intravenous infusion is met.

The device of the embodiment has the advantages of simple structure and convenient operation, can completely prevent and treat the formation of thrombus after intravenous injection, and improves the medical efficiency.

Example 2: refer to FIGS. 1 to 5

Compared with embodiment 1, the difference is that a dressing change device 5 is also included; two ends of the transfusion tube 4 are respectively communicated with the inner cavity 1a of the needle seat 1 and the dressing change device 5; the device 5 comprises a fixed seat 50 and a rotary head 51, wherein a sealed first cavity 52 is formed between the fixed seat 50 and the rotary head 51, a sealed second cavity 53 is arranged in the rotary head 51, and the fixed seat 50 is provided with a plurality of cavities 120 which are communicated with the first cavity 52 and are respectively separated from each other⁰ A drain pipe 5a and two feed liquor pipes 5b that set up, wherein drain pipe 5a and transfer line 4 intercommunication, be equipped with clip 56 No. one on two feed liquor pipes 5b respectively, be equipped with boss 55 on the fixing base 50 inner face of above-mentioned a drain pipe 5a and two feed liquor pipes 5b and first cavity 52 intercommunication respectively, be equipped with one end intercommunication second cavity 53 on the bull nose 51, the other end extends to and supports to lean on to fixing base 50 inner face and be separated by 120 respectively in first cavity 52 and the other end⁰Three liquid guide channels 54 are provided, and the three liquid guide channels 54 can be in conductive connection with the liquid outlet pipe 5a and the two liquid inlet pipes 5b by rotating the rotating head 51.

When the drug therapy is needed, firstly, a target liquid inlet pipe 5b is selected, the other liquid inlet pipe 5b adopts a first clamp 56 to clamp and block the flow, the rotating head 51 is rotated, two of the liquid guide channels 54 arranged on the rotating head 51 are communicated with the liquid inlet pipe 5b, one liquid guide channel is communicated with the liquid outlet pipe 5a, and the bosses 55 are arranged on different sides of the liquid inlet pipe 5b and the liquid outlet pipe 5a, so that when the rotating head 51 rotates until the liquid guide channels 54 are communicated with the liquid inlet pipe 5b and the liquid outlet pipe 5a, the bosses 55 on two sides limit the rotating head 51 in two directions. At the moment, the treatment liquid medicine is supplied to the target liquid inlet pipe 5b, the treatment liquid medicine is communicated with one liquid guide channel 54 through the target liquid inlet pipe 5b, at the moment, the treatment liquid medicine enters the second cavity 53 and then enters the liquid outlet pipe 5a through the other liquid guide channel 54, the treatment liquid medicine further enters the cavity 1a of the needle base 1 through the liquid conveying pipe 4 communicated with the liquid outlet pipe 5a, the treatment liquid medicine is fully fused with the blood in the venous blood vessel at the end part of the soft needle 6, and because different treatment medicines are provided with two different independent medicine supply liquid inlet pipes 5b, the dilution among different treatment liquid medicines is effectively avoided, the concentration of the supplied treatment liquid medicine is ensured, and the treatment effect of the treatment medicine is further improved.

Example 3: with reference to FIG. 1

Compared with the embodiment 2, the difference is that the top of the needle seat 1 is provided with the anti-acupuncture device S, and the puncture needle 3 is arranged on the anti-acupuncture device S and penetrates through the cavity 1a of the needle seat 1; the arrangement of the puncture-preventing device S provides the protection for medical operation of medical staff, and the risk caused by mistaken touch of the puncture needle by a patient is effectively prevented.

Example 4: with reference to FIG. 1

Compared with the embodiment 3, the difference is that three indicating arrows 511 are arranged on the rotary head 51 corresponding to the three liquid guide channels 54, and three alignment lines 512 are arranged on the fixed seat 50 corresponding to the liquid outlet pipe 5a and the two liquid inlet pipes 5 b; the alignment of the liquid guiding channel 54 and the liquid outlet pipe 5a and the liquid inlet pipe 5b can be judged according to the alignment of the indication arrow 511 and the alignment line 512 when the rotary head 51 is rotated externally, thereby improving the accuracy of the medical staff for switching the liquid supply speeds of different liquid inlet pipes 5 b.

Example 5: with reference to FIG. 1

Compared with the embodiment 2-4, the difference is that the infusion tube 4 and the liquid outlet tube 5a are in threaded connection, the infusion tube 4 is provided with the heparin cap 12, the heparin cap is used for sealing the infusion tube 4 after the infusion is finished, the infusion tube 4 and the liquid outlet tube 5a which are in threaded connection can be used for detaching the medicine changing device 5 after the infusion of a patient is finished, the burden of the patient is reduced, and the probability that the hose is pulled off can be reduced.

Example 6: with reference to FIG. 1

Compared with the embodiment 1-4, the difference is that the permanent magnet slider 91 is made of neodymium iron boron Nd2Fe14B rare earth permanent magnet material, SmCo samarium cobalt permanent magnet material, AlNiCo aluminum nickel cobalt permanent magnet material or ferrite permanent magnet material, the chute 7 is made of plastic or stainless steel material, the permanent magnet material is sold in the market at present and has stronger magnetism, the electromagnet can be firmly adsorbed after being electrified to generate magnetism, and the liquid passing hole 8 can be quickly separated after the electromagnet is powered off.

Example 7: with reference to FIG. 1

Compared with the embodiment 3 or 4, the difference is that the top end of the needle puncture preventing device S is connected with a needle pulling device 13, the needle pulling device 13 is provided with an inner cavity, the top of the puncture needle 3 penetrates through the inner cavity, and the needle pulling device 13 is convenient for a person to hold and pull out the puncture needle 3 after puncture.

Example 8: with reference to FIGS. 1, 2, 3 and 5

Compared with the above embodiment, the difference is that the infusion tube 4 is further provided with a second clamp 14, the swivel 51 is further provided with a cross rod 15, an expansion rod 16 and a limiting hole 17, wherein one end of the expansion rod 16 is hinged on the cross rod 15, the other end of the expansion rod can extend into the limiting hole 17, and the second clamp 14 is used for emergency adjustment of the infusion tube 4, for example, when the first clamp 56 on the liquid inlet tube 5b is damaged or the control precision is reduced, the second clamp 14 on the infusion tube 4 can be used for adjustment and control; the rotor 51 rotates to adjust and leads the liquid passageway 54 and go out liquid pipe 5a and feed liquor pipe 5b and switch on the back that finishes, but the telescopic link 16 on the horizontal pole 15 of swivelling joint on the rotor 51 to insert spacing hole 17 spacing after adjusting length with telescopic link 16, weaken the unstable adverse effect that causes of the state of the spacing rotor 51 of boss 55, improved the fixed stability of rotor 51, it bumps rotor 51 to reduce medical personnel's mistake and causes the skew liquid that spills of drain passageway 54.

The elastic part 10 is a tension spring, the performance of the elastic part 10 in the scheme must meet the tensile performance, and the tension spring is the most common standard part with the tensile deformation function and has a plurality of specifications to be selected.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (10)

1. An indwelling needle for assisting in the prevention of thrombosis, comprising: comprises a needle seat (1), a needle handle (2), a puncture needle (3), a transfusion tube (4) and a soft needle (6);

the infusion needle is characterized in that the needle seat (1) is connected to the needle handle (2) in a sliding mode, the soft needle (6) is sleeved on the puncture needle (3), the puncture needle (3) is fixed on the needle seat (1), a cavity (1a) is formed in the needle seat (1), and the infusion tube (4) is communicated with the cavity (1 a);

one end of the soft needle (6) is communicated with the cavity (1a) of the needle seat (1), two sliding chutes (7) are arranged in the soft needle (6) far away from the end of the needle seat (1), and a liquid passing hole (8) which can at least accommodate the puncture needle (3) to pass through is arranged between the two sliding chutes (7); two sliding blocks matched with the sliding grooves (7) are respectively arranged in the two sliding grooves (7), elastic pieces (10) are respectively arranged between the two sliding blocks and the inner wall of the soft needle (6), one of the two sliding blocks is an electromagnet sliding block (90), the other sliding block is a permanent magnet sliding block (91), opposite ends of the electromagnet sliding block (90) and the permanent magnet sliding block (91) are opposite in polarity, and the electromagnet sliding block (90) is connected with a battery (11) through a wire with a switch.

2. An indwelling needle which assists in preventing thrombosis as claimed in claim 1, wherein: the infusion tube is characterized by also comprising a dressing change device (5), wherein two ends of the infusion tube (4) are respectively communicated with the cavity (1a) and the dressing change device (5);

the dressing change device (5) comprises a fixed seat (50) and a rotary head (51), wherein a sealed first cavity (52) is formed between the fixed seat (50) and the rotary head (51), a sealed second cavity (53) is arranged in the rotary head (51), and the fixed seat (50) is provided with a communicating first cavity (52) which is separated by 120⁰A drain pipe (5a) and two feed liquor pipes (5b) of setting, wherein drain pipe (5a) and transfer line (4) intercommunication are equipped with clip (56) on two feed liquor pipes (5b) respectively, a drain pipe (5a) and two feed liquor pipes (5b) be equipped with boss (55) on fixing base (50) inner face with first cavity (52) intercommunication respectively, be equipped with one end intercommunication second cavity (53) on swivel (51), the other end extends into in first cavity (52) and supports and lean on to fixing base (50) inner face and be separated by 120 respectively⁰Three liquid guide channels (54) are arranged, and the three liquid guide channels (54) of the rotary head (51) can be communicated with the liquid outlet pipe (5a) and the two liquid inlet pipes (5 b).

3. An indwelling needle which assists in preventing thrombosis as claimed in claim 2, wherein: the top of the needle seat (1) is provided with a puncture-preventing device (S), and the puncture needle (3) is arranged on the puncture-preventing device (S) and penetrates through the cavity (1a) of the needle seat (1).

4. An indwelling needle which assists in preventing thrombosis as claimed in claim 3, wherein: three indicating arrows (511) are arranged on the rotating head (51) corresponding to the three liquid guide channels (54), and three alignment lines (512) are arranged on the fixing seat (50) corresponding to the liquid outlet pipe (5a) and the two liquid inlet pipes (5 b).

5. An indwelling needle according to any one of claims 2 to 4, which helps to prevent thrombosis, wherein: the infusion tube (4) is in threaded connection with the liquid outlet tube (5a), and the infusion tube (4) is provided with a heparin cap (12) which is used for sealing the infusion tube (4) after the infusion is finished.

6. An indwelling needle according to any one of claims 1 to 4, which helps to prevent thrombosis, wherein: permanent magnet slider (91) for neodymium iron boron Nd2Fe14B tombarthite permanent magnet material, SmCo samarium cobalt permanent magnet material, AlNiCo alNiCo permanent magnet material or ferrite permanent magnet material make, spout (7) make for plastics or stainless steel material.

7. An indwelling needle which assists in preventing thrombosis as claimed in claim 3 or claim 4, wherein: the needle pulling device (13) is connected to the top end of the needle puncture preventing device (S), an inner cavity is formed in the needle pulling device (13), and the top of the puncture needle (3) penetrates through the inner cavity.

8. An indwelling needle which assists in preventing thrombosis as claimed in claim 5, wherein: the infusion tube (4) is further provided with a second clamp (14), the rotating head (51) is further provided with a cross rod (15), a telescopic rod (16) and a limiting hole (17), one end of the telescopic rod (16) is hinged to the cross rod (15), and the other end of the telescopic rod can extend into the limiting hole (17).

9. An indwelling needle which assists in preventing thrombosis as claimed in claim 7, wherein: the rotary head (51) is further provided with a cross rod (15), a telescopic rod (16) and a limiting hole (17), wherein one end of the telescopic rod (16) is hinged to the cross rod (15), and the other end of the telescopic rod can extend into the limiting hole (17).

10. An indwelling needle which assists in preventing thrombosis as claimed in claim 5, wherein: the elastic piece (10) is a tension spring.

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