CN112472251A

CN112472251A - Nerve block anesthesia needle, anesthesia device and use method thereof

Info

Publication number: CN112472251A
Application number: CN202110026807.2A
Authority: CN
Inventors: 肖永芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-09
Filing date: 2021-01-09
Publication date: 2021-03-12
Anticipated expiration: 2041-01-09
Also published as: CN112472251B; CN115054338A

Abstract

The invention provides a nerve block anesthesia needle, an anesthesia device and a using method thereof. The nerve block anesthesia needle comprises a needle cylinder, a piston core rod and a speed blocking assembly, wherein the needle cylinder is provided with a cavity, the front end of the needle cylinder is provided with a liquid outlet hole, the piston core rod is matched with the needle cylinder, the speed blocking assembly comprises a folding arm and a supporting bag body, the wall of the needle cylinder is provided with a notch communicated with the cavity, the folding arm is hinged in the notch, one extending end of the hinge joint of the folding arm is connected with the inner wall of the needle cylinder through the supporting bag body, the supporting bag body is filled with gas, and the other extending end of the hinge joint of the folding arm extends into the cavity from the notch; the support bag body is provided with a seal capable of being torn and exhausting gas, and the folding arm is adhered to the seal. Compared with the prior art, the nerve block anesthesia needle provided by the invention has the function of reminding an operator of withdrawing, improves the puncture accuracy and reduces the discomfort of a patient.

Description

Nerve block anesthesia needle, anesthesia device and use method thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a nerve block anesthesia needle, an anesthesia device and a using method thereof.

Background

Nerve block anesthesia is a method in which a local anesthetic is injected near a peripheral nerve trunk to block conduction of nerve impulses, thereby anesthetizing a region innervated by nerves. The nerve block only needs to inject one position to obtain a larger anesthesia area, but has the possibility of causing serious complications, so the operation must be familiar with local dissection, and know tissues through which the puncture needle passes, nearby blood vessels, organs, body cavities and the like.

When the anesthetic is injected, the anesthetic is pushed backwards, inwards and downwards at a proper position, and when a patient feels strange feeling of radiating to fingers, wrists or forearms, the advance is stopped, and if blood or air is not pumped back, the liquid medicine is injected. Therefore, during the injection of the anesthetic, the withdrawal is important, and the complications caused by improper puncture can be effectively avoided.

At present, the existing anesthetic needle, such as an improved anesthetic needle for multi-drug injection disclosed in patent publication No. CN106581820A, is only improved in the aspect of how to realize the injection of multiple drugs at one time; a portable anesthetic needle disclosed in patent publication No. CN108355202A is improved only in terms of portability and convenience; as also disclosed in patent publication No. CN109223054A, a bone marrow puncturing and extracting device with a positioning frame is provided for solving the problem of reducing the number of puncturing times, and is further provided with a positioning frame, which is convenient for medical staff to perform puncturing and bone marrow fluid extracting operations; other anesthetic needles are used to solve the problem of controlling the injection amount. These existing anesthetic needles do not have a reminding function on withdrawal, and once the needle insertion position is not correct, whether the needle penetrates into an artery or a vein is checked without withdrawal, a series of concurrent symptoms caused by improper puncture can appear, so that pain is brought to a patient.

Disclosure of Invention

The invention aims to provide a nerve block anesthesia needle with a back-suction reminding function, an anesthesia device and a using method thereof, and the accuracy of puncture is improved.

The technical scheme of the invention is as follows: a nerve block anesthesia needle comprises a needle cylinder, a piston core rod and a speed blocking assembly, wherein the needle cylinder is provided with a cavity, the front end of the needle cylinder is provided with a liquid outlet hole, the piston core rod is matched with the needle cylinder, the speed blocking assembly comprises a folding arm and a supporting bag body, the wall of the needle cylinder is provided with a notch communicated with the cavity, the folding arm is hinged in the notch, one extending end of the hinge joint of the folding arm is connected with the inner wall of the needle cylinder through the supporting bag body, the supporting bag body is filled with gas, and the other extending end of the hinge joint of the folding arm extends into the cavity from the notch; the support bag body is provided with a seal capable of being torn and exhausting gas, and the folding arm is adhered to the seal.

In the scheme, the speed blocking assembly is arranged in the anesthetic needle, so that the pushed piston core rod is initially blocked, only slight blocking force needs to be generated for the initial blocking, the induction of an operator is not smooth, and the operator is informed of the fact that the piston core rod needs to be drawn back; meanwhile, the primary thrust of the piston core rod enables the folding arm to have certain deflection, and the seal is torn off through the deflection, so that an opening capable of discharging gas is exposed on the supporting bag body; the supporting force of the supporting bag body weakens, the folding arm is not limited, at the moment, the piston core rod does not have any blocking force when being pushed again, the anesthetic can be smoothly injected, the pumpback prompt function during the operation can be very simple, convenient and accurate through the structure of the blocking speed assembly, the puncture accuracy is effectively improved, and the discomfort of a patient is reduced.

Keep off the design of fast subassembly and will synthesize it and produce the barrier force, and can release this barrier force fast, and structural design can not be too complicated, it needs simply to realize the principle, and swift, consequently, structural design support the utricule, and aerify the body in supporting the utricule, not only make the arm that rolls over have the production of barrier force under the effect of gas inflation, and can tear the support utricule and release gas with the help of the propulsive force of plunger rod, the barrier force release of the arm that rolls over has also been released simultaneously, with fine realization above-mentioned function.

Preferably, the speed stopping assembly further comprises a tension spring for pulling the folding arm back into the notch from the cavity after the gas in the supporting bag body is exhausted, the tension spring is located beside the supporting bag body, and the tension spring is connected with the folding arm and the cylinder wall of the cylinder.

The design of extension spring, the gaseous exhaust speed in the multiplicable support utricule on the one hand, on the other hand can be with folding the arm and draw back the notch fast in, provide convenient for impel the piston core bar for the second time.

Preferably, the folding arm comprises a first arm and a second arm connected with the first arm at an obtuse angle, the first arm is connected with the supporting bag body, the second arm extends into the cavity, and the folding angle of the first arm and the second arm is hinged to the needle cylinder.

The lever principle is fully utilized, the folding arms are designed to be structures with two arms forming an obtuse angle, the motor function can be well realized, and the blocking force is given to the piston core rod and can be quickly released.

Preferably, the obtuse angle of the first arm and the second arm is opposite to the advancing direction of the piston core rod; or the obtuse angle of the first arm and the second arm is in the same direction as the advancing direction of the piston core rod; and the second arm is provided with a blocking tooth, and the blocking tooth faces to the reverse side of the advancing direction of the piston core rod. The above structural design is realized by utilizing the generation and release of the blocking force.

Preferably, the needle cylinder further comprises a limiting assembly sleeved outside the needle cylinder, the limiting assembly comprises a lantern ring, a baffle arranged at one end of the lantern ring, and sliding blocks circumferentially distributed on the lantern ring, the lantern ring is sleeved on the needle cylinder, one end of each sliding block is attached to the baffle, and at least four sliding blocks are distributed on the lantern ring; the baffle is far away from the liquid outlet hole, and the shape of the baffle is hexagonal; the seal is adhered to the folding arm in the advancing direction of the piston core rod.

The anesthesia needle can realize the positioning function in the using process through the limiting component, avoid random swing during needle insertion and ensure the accuracy of needle insertion.

The invention also provides a nerve block anesthesia device, which comprises an anesthesia needle, a pressing plate and a support plate arranged on the pressing plate, wherein the anesthesia needle is the nerve block anesthesia needle, the anesthesia needle is connected with an angle adjusting component arranged on the support plate, and the angle adjusting component is used for adjusting and maintaining the angle between the anesthesia needle and the support plate.

In the above-mentioned scheme, effectively fix a position the anesthesia needle through clamp plate, extension board, carry out angle modulation to the anesthesia needle through angle adjusting part simultaneously to realize the needle of inserting of the different angles of different puncture positions, fixed firm and convenient needle inserting, extensive applicability.

Preferably, the angle adjusting assembly comprises a gear, a semi-gear ring and a mounting pipe, the gear is rotatably mounted on the support plate, gear teeth meshed with the gear are arranged on the inner circular surface of the semi-gear ring, the outer circular surface of the semi-gear ring is connected with the mounting pipe, and the mounting pipe is used for sleeving the anesthetic needle.

Through the mode of gear engagement, realize angle modulation's stability and become more meticulous.

Preferably, an adjusting handle is arranged on one side, away from the support plate, of the gear, a first sucker is arranged on one side, close to the support plate, of the half gear ring, a handle is arranged on one side, away from the support plate, of the half gear ring, and the mounting pipe and the half gear ring are integrally formed.

Through gear engagement, make the meshing tooth that half ring gear can follow the gear slide, and combine the sucking disc, make half ring gear can be quick carry out the fixed of angular position with the extension board, when readjusting, through the pull to the direction pulling of keeping away from the extension board, the sucking disc breaks away from the extension board after, can carry out the regulation of angle again, convenient operation.

Preferably, the device further comprises an adsorption part, the adsorption part comprises a balloon and a second sucker arranged at one end of the balloon and communicated with the inside of the balloon, a hard ring is arranged at the tail end, far away from the balloon, of the second sucker, and a valve communicated with the inside of the balloon is arranged on the balloon; one end of the sacculus, which is far away from the second sucker, is connected with the support plate.

Some puncture positions, such as axillary pathways, need touch the axillary artery pulsation in the department that meets of pectoralis major lower edge and arm medial border to touch the peak of pulsation to the armpit top, because of different patient skin tissue are different, slightly cave in, do not good to execute the needle, consequently, designed the adsorption element, can produce the uplift behind the negative pressure with the puncture peripheral position of executing the needle, on the one hand, can find the position of puncture, on the other hand, do benefit to the anesthetic and sell near, the end diffusion to the axillary, in order to do benefit to the blocking musculocutaneus.

The invention also provides a using method of the nerve block anesthesia device, which comprises the following steps:

placing the nerve block anesthesia device at a proper position beside a user, and fixing the whole device through the pressing plate;

mounting an anesthetic needle in a mounting tube of the angle adjusting assembly, and enabling a sliding block on the anesthetic needle to be matched with a sliding groove in the mounting tube;

rotating the adjusting handle to adjust the angle of the anesthetic needle;

after the angle adjustment is finished, the half gear ring is pushed towards the support plate, so that the first suction disc is adsorbed with the support plate to fix the angles of the half gear ring, the installation pipe and the anesthetic needle;

attaching the hard ring of the adsorption piece to the side skin of the position needing puncture, simultaneously collapsing and loosening the balloon, and generating negative pressure by the balloon to enable the hard ring to be tightly attached to the skin; pulling the adsorption piece to enable the adsorbed skin surface to be raised;

inserting a needle at a proper position on the surface of the raised skin, and sliding a sliding block on the limiting assembly in a sliding groove in the mounting tube while inserting the needle; after reaching the proper depth, the piston core rod of the anesthetic needle is pushed;

when the piston core rod is in initial contact with the folding arm, resistance is generated due to the function of supporting the capsule body, and the piston core rod is reminded to be drawn out for a certain distance; the folding arm tears the seal under the action of the primary thrust of the piston core rod, so that the supporting capsule body tears to form an exhaust port, and the gas in the supporting capsule body is exhausted through the exhaust port;

at the moment, the tensile force generated by the tension spring overcomes the supporting force of the supporting bag body, and the part of the folding arm extending into the cavity is pulled back into the notch;

pushing the piston core rod again to push the anesthetic out of the liquid outlet hole;

after the completion, the anesthetic needle slides out from the mounting tube, and the valve of the adsorption piece is opened to release the negative pressure.

Compared with the related technology, the invention has the beneficial effects that:

firstly, the anesthetic needle has the function of reminding an operator of withdrawing, so that the puncture accuracy is improved, and the discomfort of a patient is reduced;

secondly, the generation and the rapid release of the blocking force can be realized by adopting the inflatable supporting air bag, so that the prompting function can be well played, and the use of the anesthetic needle is not influenced;

thirdly, the positioning of the anesthetic needle is realized through the limiting assembly, and the influence on the injection of anesthesia caused by position swing in the use process is avoided;

the angle adjusting assembly realizes rotation and sliding through gear engagement, so that the angle can be accurately adjusted, and the position fixing of the angle can be quickly realized;

fifthly, through the design of the adsorption piece, on one hand, the puncture position can be accurately found, and on the other hand, the diffusion of the anesthetic to the axilla pin and the end is facilitated, so that the blocking of the musculocutaneous nerve is facilitated.

Drawings

FIG. 1 is a schematic structural view of a nerve block anesthetic needle provided by the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic diagram showing a sectional view of the stop assembly of FIG. 1;

FIG. 4 is a schematic structural view of a nerve block anesthesia apparatus provided in the present invention;

figure 5 is a left side view of figure 4 with the anesthetic needle and the absorbent member removed.

In the drawings: 1-anesthetic needle, 11-syringe, 111-cavity, 112-notch, 12-needle body, 13-plunger rod, 14-speed blocking component, 141-folding arm, 1411-first arm, 1412-second arm, 1413-blocking tooth, 142-supporting capsule, 1421-seal, 143-tension spring, 15-spacing component, 151-lantern ring, 152-baffle, 153-sliding block, 2-pressing plate, 3-supporting plate, 4-angle adjusting component, 41-gear, 42-half gear ring, 43-mounting tube, 431-sliding groove, 44-adjusting handle, 45-first sucking disc, 46-handle, 5-adsorption piece, 51-balloon, 52-second sucking disc, 53-hard ring, 54-valve and 55-pull rope.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

As shown in fig. 1, the nerve block anesthesia needle provided by the present embodiment comprises a needle cylinder 11, a needle body 12, a plunger core bar 13, a speed blocking component 14 and a limiting component 15.

The needle cylinder 11 is provided with a cavity 111, the front end of the needle cylinder is provided with a liquid outlet hole, a needle body 12 is arranged on the liquid outlet hole, and the needle body 12 is communicated with the liquid outlet hole. The plunger core bar 13 is matched with the syringe 12, and the plunger core bar 13 can slide in the cavity 111 of the syringe 12.

As shown in fig. 1 and 2, a notch 112 penetrating into the cavity 111 is provided in the cylinder wall of the cylinder 11. The speed stop assembly 14 includes a knuckle arm 141, a support bladder 142 and a tension spring 143.

The folding arm 141 includes a first arm 1411 and a second arm 1412 connected to the first arm 1411 at an obtuse angle. Said first arm 1411 is connected to the inner wall of the barrel 11 through said support capsule 142. The support bladder 142 is filled with a gas such that the second arm 1412 extends into the cavity 111. The supporting capsule 142 is provided with a seal 1421 capable of tearing and discharging gas, and the seal 1421 is adhered to the first arm 1411 of the folding arm 141 in the advancing direction of the plunger rod 13. The folded angles of the first and second arms 1411 and 1412 are hinged to the needle cylinder 11. The seal 1421 is mounted on the plunger rod in a sliding position, and when the second arm 1412 is pushed by the plunger rod 13, the first arm 1411 can tear the seal 1421 quickly, and only a small opening is needed to release the gas in the support capsule 142.

The tension spring 143 is located at the side of the supporting capsule 142, and the tension spring 143 connects the first arm 1411 and the wall of the syringe 11. When the gas in the support bladder 142 is vented, the tension spring 143 pulls the second arm 1412 from the cavity 111 back into the slot 112.

In this embodiment, the obtuse angle of the first and second arms 1411, 1412 is oriented opposite the direction of travel of the plunger core 13 (as shown in FIGS. 1, 2), and the second arm 1412 of the structure is pulled by the tension spring 143 in a clockwise direction as shown in FIG. 1 back into the slot 112. In other embodiments, the obtuse angular orientation of the first and second arms 1411, 1412 may also be the same as the direction of travel of the plunger core rod, with the second arm 1412 of the structure being pulled back into the slot 112 in a counterclockwise direction by the extension spring 143. In any case, the second arm 1412 is provided with a stop tooth 1413, and the stop tooth 1413 faces the opposite side of the advancing direction of the plunger core rod 13. The catch 1413 can increase the pushing force of the plunger rod 13 and convert the pushing force into a tearing force, so as to tear the seal 1421 quickly.

Two speed blocking assemblies 14 can be arranged on the circumference of the needle cylinder 11, so that resistance is increased, and better hand feeling is realized.

As shown in fig. 1 and 3, the position limiting assembly 15 includes a collar 151, a baffle 152 disposed at one end of the collar 151, and sliding blocks 152 circumferentially distributed on the collar 151. The lantern ring 151 is sleeved on the needle cylinder 11, and one end of the sliding block 152 is attached to the baffle 152. The slider 152 is in at least four distribute on the lantern ring 151, four are 90 degrees and distribute, and the needle that will anaesthetize that can be fine is steadily placed in this contained angle, through between slider and the slider, prevents the rotation of anaesthesia needle. The baffle 152 is kept away from the liquid outlet hole, and the baffle 152 is hexagonal in shape and is limited at different angles by four sliding blocks 153.

As shown in fig. 4 and 5, the invention also provides a nerve block anesthesia apparatus, which comprises an anesthesia needle 1, a pressing plate 2, a support plate 3, an angle adjusting component 4 and an adsorption piece 5. The anesthetic needle 1 is the nerve block anesthetic needle.

The support plate 3 is arranged on the pressure plate 2, and the support plate and the pressure plate form a T-shaped structure. When in use, the bottom of the pressing plate 2 is provided with an adhesive piece (not shown), and the pressing plate 2 and the whole anesthesia device thereon are adhered to a bed or the body of a patient by tearing the release film. Alternatively, the plate 3 may be provided at one end of the plate 2, because the plate 2 is placed under the body of the patient and pressed and fixed by the body of the patient.

The anesthetic needle 1 is connected with an angle adjusting component 4 arranged on the support plate 3, and the angle adjusting component 4 is used for adjusting and maintaining the angle between the anesthetic needle 1 and the support plate 3.

The angle adjusting assembly 4 comprises a gear 41, a half-gear ring 42, a mounting tube 43, an adjusting handle 44, a first suction cup 45 and a handle 46. The gear 41 is rotatably mounted on the carrier plate 3 by means of a shaft (not numbered). Gear teeth meshed with the gear 41 are arranged on the inner circular surface of the semi-gear ring 42, and the inner circle of the semi-gear ring 42 is matched with the outer circle of the gear 41. The outer circular surface of the semi-gear ring 42 is connected with the mounting pipe 42, and the semi-gear ring and the mounting pipe are integrally formed. The mounting tube 43 is used for sleeving the anesthetic needle 1, specifically, sliding grooves 431 corresponding to the sliding blocks 153 in position and number are circumferentially arranged in the mounting tube 43, and during insertion, the sliding blocks are matched with the sliding grooves 431.

An adjusting handle 44 is arranged on one side of the gear 41 far away from the support plate 3. The side of the half gear ring 42 adjacent to the fulcrum 3 is provided with a first suction disc 45. The side of the half gear ring 42 away from the fulcrum 3 is provided with a pull handle 46.

The gear 41 is meshed with the semi-gear ring 42 through the gear 41 to realize the rotation of the gear 41, the semi-gear ring 42, the installation tube 43 and the anesthetic needle 1 are driven to rotate together, after the position is adjusted, a slideway is formed through gear meshing, the semi-gear ring 42 is pushed towards the support plate 3 and is fixed through the adsorption force of the first sucker 45.

When the angle needs to be adjusted again, the first suction disc 45 on the half gear ring 42 is separated from the support plate 3 through the handle 46, so that the half gear ring 42 has no constraint and can be adjusted with the gear 41.

As shown in fig. 4, the suction member 5 includes a balloon 51 and a second suction cup 52 disposed at one end of the balloon 51 and communicating with the inside of the balloon 51, and a hard ring 53 is disposed at a distal end of the second suction cup 52 away from the balloon 51. The balloon 51 is provided with a valve 54 communicated with the inside of the balloon 51. The end of the balloon 51 remote from the second suction cup 52 is attached to the strip 3. The balloon 51 is connected to the support plate 3 by a pull string 55, which may be an elastic pull string, and is required to ensure that the absorption member 5 has a sufficient length for use.

s1, placing the nerve block anesthesia device at a proper position beside a user, and fixing the whole device by the pressing plate 2, wherein the whole device is either adhered or compacted by the body.

S2, sleeving the anesthetic needle 1 in the mounting tube of the angle adjusting component 4, matching the slide block 153 on the anesthetic needle 1 with the slide groove 431 in the mounting tube 43, and mounting the needle body 12 at the liquid outlet.

And S3, rotating the adjusting handle to adjust the anesthetic needle to a proper angle. In general, the anesthetic needle 1 is inserted at an angle of 60 ° to the skin.

S4, after the angle adjustment is completed, the half-ring gear 42 is pushed toward the carrier 3, and the first suction pad 45 is brought into contact with and attracted to the carrier 3, thereby fixing the angles of the half-ring gear 42, the mounting tube 43, and the anesthetic needle 1.

S5, attaching the hard ring 53 of the adsorption piece 5 to the side skin of the position needing puncture, and simultaneously collapsing and loosening the balloon, wherein the balloon generates negative pressure to enable the hard ring to be tightly attached to the skin; the adsorption piece is pulled to enable the adsorbed skin surface to be raised.

S6, inserting the needle at the proper location on the raised skin surface while the slider 153 on the stop assembly 15 slides within the slide groove 431 in the mounting tube 43. And after reaching the proper depth (the needle point enters the depth of 1-2 cm), pushing a piston core rod 13 of the anesthetic needle. The needle insertion needs to be slow, and in general, when the needle insertion is performed until a numbness is felt, the needle needs to be retracted by 2mm to avoid damaging nerves. The baffle 152 arranged on the limiting component 15 also plays a limiting role in preventing the needle from being inserted too deeply.

S7, when the plunger 13 is first contacted with the second arm 1412 of the folding arm 141, a resistance is generated due to the function of the support capsule 142, and at this time, the plunger 13 needs to be drawn out for a certain distance after the operator feels the hand. The arm 141 is pivoted by the initial pushing force of the plunger stem 13 and breaks the seal 1421, causing the support bladder 142 to tear a vent for venting gas through which the gas in the support bladder 142 is vented.

S8, at this time, the pulling force generated by the tension spring 143 overcomes the supporting force of the support capsule 142, and pulls the portion (the second arm 1412) of the folding arm 141 extending into the cavity 111 back into the notch 112.

S9, when no blood is present during the withdrawal of the piston core bar in the step S7, the piston core bar 13 is pushed again to push the anesthetic from the liquid outlet hole into the tissue. If blood is drawn out, the needle needs to be withdrawn and the position needs to be adjusted again.

If the angle needs to be adjusted again, the half gear ring 42 is pulled out through the pull handle 46, the first suction disc 45 on the half gear ring is separated from the support plate 3, the anesthetic needle is adjusted to a proper angle position and fixed through rotating the adjusting handle 44 again, and then the needle is inserted according to the steps.

S10, after the anesthesia injection is completed, the anesthesia needle 1 slides out of the installation tube 43, and the valve 54 of the adsorption piece 5 is opened to release the negative pressure.

In addition, the anesthetic should be injected smoothly, otherwise, the position of the anesthetic needle needs to be adjusted slightly. The amount of anesthetic injected is related to the different anesthetic surgical locations.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A nerve block anesthesia needle comprises a needle cylinder with a cavity and a liquid outlet hole at the front end, and a piston core rod matched with the needle cylinder, and is characterized by further comprising a speed blocking assembly, wherein the speed blocking assembly comprises a folding arm and a supporting bag body, a notch communicated with the cavity is formed in the wall of the needle cylinder, the folding arm is hinged in the notch, one extending end of the hinge point of the folding arm is connected with the inner wall of the needle cylinder through the supporting bag body, gas is filled in the supporting bag body, and the other extending end of the hinge point of the folding arm extends into the cavity from the notch; the support bag body is provided with a seal capable of being torn and exhausting gas, and the folding arm is adhered to the seal.

2. The nerve block anesthetic needle according to claim 1, wherein the speed blocking assembly further includes a tension spring that pulls the folding arm from the chamber back into the notch after the gas in the support balloon is exhausted, the tension spring is located beside the support balloon, and the tension spring connects the folding arm and the cylinder wall of the cylinder.

3. The nerve block anesthesia needle of claim 1, wherein the folded arm comprises a first arm and a second arm connected to the first arm at an obtuse angle, the first arm is connected to the support balloon, the second arm extends into the cavity, and the folded angle of the first arm and the second arm is hinged to the needle cylinder.

4. The nerve block anesthesia needle of claim 3, wherein the obtuse angle of the first and second arms is oriented opposite to the direction of travel of the plunger core rod; or the obtuse angle of the first arm and the second arm is in the same direction as the advancing direction of the piston core rod; and the second arm is provided with a blocking tooth, and the blocking tooth faces to the reverse side of the advancing direction of the piston core rod.

5. The nerve block anesthesia needle according to any one of claims 1 to 4, further comprising a limiting component sleeved outside the needle cylinder, wherein the limiting component comprises a sleeve ring, a baffle plate arranged at one end of the sleeve ring, and sliding blocks circumferentially distributed on the sleeve ring, the sleeve ring is sleeved on the needle cylinder, one end of each sliding block is attached to the baffle plate, and at least four sliding blocks are distributed on the sleeve ring; the baffle is far away from the liquid outlet hole, and the shape of the baffle is hexagonal; the seal is adhered to the folding arm in the advancing direction of the piston core rod.

6. A nerve block anesthesia apparatus, including the anesthesia needle, characterized by, still include the clamp plate and locate the extension board on the clamp plate, the anesthesia needle is as in any claim 1~5 of nerve block anesthesia needle, the anesthesia needle with set up on the extension board angle adjusting part is connected, the angle adjusting part is used for adjusting and keeping the angle between anesthesia needle and the extension board.

7. The nerve block anesthesia apparatus of claim 6, wherein the angle adjustment assembly comprises a gear, a semi-ring gear and a mounting tube, the gear is rotatably mounted on the support plate, the inner circular surface of the semi-ring gear is provided with gear teeth engaged with the gear, the outer circular surface of the semi-ring gear is connected with the mounting tube, and the mounting tube is used for sleeving the anesthesia needle.

8. The nerve block anesthesia apparatus of claim 7, wherein the side of the gear away from the strut is provided with an adjustment handle, the side of the half-gear ring adjacent to the strut is provided with a first suction cup, the side of the half-gear ring away from the strut is provided with a pull handle, and the mounting tube is integrally formed with the half-gear ring.

9. The nerve block anesthesia apparatus of claim 6, further comprising an absorption member, wherein the absorption member comprises a balloon and a second suction cup arranged at one end of the balloon and communicated with the inside of the balloon, the end of the second suction cup far away from the balloon is provided with a hard ring, and the balloon is provided with a valve communicated with the inside of the balloon; one end of the sacculus, which is far away from the second sucker, is connected with the support plate.

10. A method of using the nerve block anesthesia apparatus of any one of claims 6-9, comprising:

rotating the adjusting handle to adjust the angle of the anesthetic needle;