CN102188252A

CN102188252A - Convenient disposable safety blood collecting device

Info

Publication number: CN102188252A
Application number: CN2011100603147A
Authority: CN
Inventors: 张亚根; 王林
Original assignee: Individual
Current assignee: Henan Shuguang Huizhikang Biotechnology Co ltd
Priority date: 2011-03-14
Filing date: 2011-03-14
Publication date: 2011-09-21
Anticipated expiration: 2031-03-14
Also published as: CN102188252B

Abstract

The invention discloses a convenient disposable safety blood collecting device, which consists of a rubber sleeve, a bottle penetrating needle, rubber cap, a puncture needle hub, a puncture needle, a spring and an outer sleeve. When the device is used, the puncture needle hub is pushed by hand to a right position, a handle on the puncture needle hub then is pushed to allow the puncture needle to extend out of the outer sleeve forward till the handle on the puncture needle hub and a fastening platform on the outer sleeve are fastened together, and thus, a 'Z-shaped' blood collecting channel which consists of the puncture needle, the puncture needle hub, the rubber cap, a bottle penetrating needle hub and the bottle penetrating needle and has a gap in the middle is formed for collecting blood under the action of a negative pressure blood collecting pipe. When blood collection is accomplished, and the puncture needle is pulled out from the body of a patient, the handle on the puncture needle hub is pulled to break the fastening of the handle and the outer sleeve; and at the same time, through the inclination action of an inclined plane on the puncture needle hub and the spring and the slotted bottom face of the outer sleeve, the puncture needle hub deflects when returning to factory settings, and the tip of the puncture needle points to a direction deflecting from a round hole in the outer sleeve and is prevented from extending out freely.

Description

The disposable safe hemostix of convenient use

Technical field

The present invention relates to a kind of medical hemostix, is a kind of disposable safe hemostix with convenient use of blood collection function.

Technical background

The disposable safe hemostix of convenient use of the present invention mainly is to be used for medical purpose, by puncture technique, the patients'blood sample collection in specific container, is being chemically examined and treated in the process of disease, bringing into play enormous function, is indispensable diagnosis and treatment utensil.But, along with the variation of nature advancing of disease with virus, antibacterial, cross infection and the pathophoresis that takes place with blood or body fluid contact is on the rise, and (as: drug addict is to the common or repeated use of instrument used for injection, cause the bamboo telegraph of disease, be exactly in addition in daily medical act, entry needle is also very serious to the nosocomial infection of medical personnel's pricking wound initiation, even causes transmissions of disease such as AIDS, hepatitis B, hepatitis C).The disposable requirement of medical appliance (syringe, hemostix etc.) with puncture function has been risen to the laws and regulations requirement of various countries.And The World Health Organization (WHO) has also strictly regulated safety injection (puncture) three elements: 1, harmless to user; 2, harmless to receiver (patient); 3, environmental sound; At present, mostly the hemostix of clinical use is plain edition hemostix (not having security feature substantially), after finishing the purpose of gathering patient blood, can not realize the safeguard protection to puncture needle on the hemostix, has the risk of stabbing medical personnel or waste disposal personnel.For making hemostix can satisfy the requirement of safe handling; the scientific worker has carried out number of research projects; a large amount of technical schemes is disclosed; relate in the patent of blood sampling as surplus the Patent Office of the People's Republic of China disclosed 1000 part; that have typical meaning is ZL:200610117439.8; ZL:200910304650.4 and ZL:00811508.7; these several schemes all are to utilize the blood taking needle after spring will use to be recovered in the blood sampling overcoat; though the deficiency of the common now hemostix of solution in safeguard protection that can both be in various degree; but; because the technical thought difference of each scheme; structure is different, all exists following deficiency:

1, hemostix directly is made of one with blood taking tube, like improving, in fact can not adapts to the operational requirements of once gathering the multitube blood preparation outwardly.

2, all need to adopt a special-purpose member (interior overcoat or fixedly back-up ring) to realize startup to puncture needle protection action, so, complex structure.

3, all need untapped puncture needle is protected again, promptly increase the constituent components of apparatus, increase the operation link that medical personnel remove the puncture needle protective cap again.

So at present domestic also do not have the technical scheme that a kind of structure is simple more, manufacturing is more prone to and operate disposable more easily use hemostix to be disclosed.

Summary of the invention

The disposable safe hemostix of the convenient use of the present invention by gum cover, wear a bottle pin, Capsule, Paracentesis needle holder, puncture needle, spring and overcoat and form.Wherein, wear bottle pin and be bonded in wearing on bottle needle stand of overcoat, gum cover is contained in to wear on bottle needle stand and will wear a bottle pin and covers, Capsule is contained on the transverse tube on the Paracentesis needle holder, puncture needle is bonded on the puncture needle base on the Paracentesis needle holder, and spring housing places the interior space of overcoat outside puncture needle and with Capsule, Paracentesis needle holder and puncture needle.During use, at first with the positive Paracentesis needle holder of hand push, and then the handle on the promotion Paracentesis needle holder, puncture needle is stretched out forward from overcoat, groove on Paracentesis needle holder with outside the button platform that puts engage, this moment, spring was compressed, Capsule, Paracentesis needle holder and puncture needle assembly and overcoat keep relative stability, transverse tube on the Paracentesis needle holder with wear transverse tube on bottle needle stand and clip Capsule and align driving fit, blood collection work can begin, after blood sampling finishes and puncture needle is extracted in the patient body, pull handle on the Paracentesis needle holder with hands, make the releasing that engages between handle and the overcoat, at this moment, Paracentesis needle holder, Capsule and puncture needle assembly under the effect of spring restoring force to swivel motion, and get back to fully in the inner chamber of overcoat, simultaneously, because inclined-plane on the Paracentesis needle holder and spring and the tilting action that puts the slotted eye bottom surface outward, Paracentesis needle holder deflects when getting back to the product export state, makes the needle point of puncture needle point to depart from the outer circular hole that puts and can not arbitrarily stretch out again.

In the present invention program; owing to adopted the unique design route; make blood collecting puncture needle be positioned at the hemostix side that keeps to the side; puncture working when being beneficial to blood sampling; in the structure design; owing to adopted novel collapsible circuit design; make apparatus in use with in the accumulating a small and exquisite figure be arranged all; not only be beneficial to attractive in appearance but also be beneficial to use; also expand the structure function of overcoat simultaneously; make its before use with use after can both be to its protective effect of puncture needle; in addition, also, make under unexpected maloperation situation because the present invention has adopted deflection angle to limit the technology of stretching out in the protection to puncture needle; can not make puncture needle protrude in overcoat, thereby can avoid acupuncture to accidentally injure.So the present invention has broken the consistent design philosophy in traditional hemostix field, optimized the structural design of hemostix, realized the safeguard protection of hemostix and satisfied the requirement of rule of operation that its advantage applies exists:

● expanded the function of use of original overcoat.

● small and exquisite configuration is beneficial to the blood sampling operation.

● realize the security function of apparatus, avoided the acupuncture accidental injury.

● simplified the operation sequence of apparatus.

Technical characterictic of the present invention is the technical scheme that has broken through existing all hemostixes, has tangible novelty.Use product of the present invention, its safety and effectiveness is good, uses simple operation, and the type grace is small and exquisite, meets clinical use working specification, for the clinical medical and nursing worker provides safe and reliable product.

Description of drawings

Fig. 1 is that combinative structure of the present invention launches signal and local enlarged diagram.

Fig. 2 is the present invention's structural representation before use.

Fig. 3 is the present invention's structural representation in use.

Fig. 4 is that the present invention reaches the structural representation when using back puncture needle deflection angle to avoid mistake to stretch out before use.

The specific embodiment

Technical scheme for a better understanding of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings.

Fig. 1 is that combinative structure of the present invention launches signal and local enlarged diagram, by this figure as can be known: the present invention by gum cover 1, wear bottle pin 2, Capsule 3, Paracentesis needle holder 4, puncture needle 2A, spring 5 and overcoat 6 and form.Wherein, wear bottle pin 2 and be bonded in wearing on bottle needle stand 6D on the overcoat 6, gum cover 1 is contained in to wear on bottle needle stand 6D and will wear bottle pin 2 and covers, Capsule 3 is contained on the transverse tube 4A4 on the Paracentesis needle holder 4, puncture needle 2A is bonded on the puncture needle base 4A3 on the Paracentesis needle holder 4, and it is outer and place the interior space of overcoat 6 with Capsule 3, Paracentesis needle holder 4 and puncture needle 2A that spring 5 is enclosed within puncture needle 2A.During use, at first with the positive Paracentesis needle holder 4 of hand push, and then the handle 4C on the promotion Paracentesis needle holder 4, puncture needle 2A is stretched out forward from overcoat 6, engage with the platform 6C that buckles on the overcoat 6 until the groove 4C1 on the Paracentesis needle holder 4, this moment, spring 5 was compressed, Capsule 3, Paracentesis needle holder 4 and puncture needle 2A assembly and overcoat 6 keep relative stability, transverse tube 4A4 on the Paracentesis needle holder 4 with wear transverse tube on bottle needle stand 6D and clip Capsule 3 and align driving fit, blood collection work can begin, after blood sampling finishes and puncture needle 2A is extracted in the patient body, pull handle 4C on the Paracentesis needle holder 4 with hands, make the releasing that engages between handle 4C and the overcoat 6, at this moment, Paracentesis needle holder 4, Capsule 3 and puncture needle 2A assembly under the effect of spring 5 restoring forces to swivel motion, and get back to fully in the inner chamber of overcoat 6, simultaneously, because inclined-plane 4A1 on the Paracentesis needle holder 4 and the tilting action of the inclined end face 6B1 on spring 5 and the slotted eye 6B, Paracentesis needle holder 4 deflects when getting back to slotted eye 6B lower end, at this moment, the needle point of puncture needle 2A is just in time got back in the interior space of the oblate pipe 6A1 on the overcoat 6, so the needle point sensing of puncture needle 2A will depart from circular hole 6A11 and can not arbitrarily stretch out from overcoat 6 more again;

Capsule 3 has crack 3A for a mouthful end has the thin-wall construction that encircles muscle in its end, Capsule 3 can closely be fastened on the transverse tube 4A4 of Paracentesis needle holder 4, and the port on the transverse tube 4A4 is sealed with the form that crack 3A is arranged;

Paracentesis needle holder 4 is for being provided with ramp 4A1 on a pedestal 4A, spring base 4A2, puncture needle base 4A3 and transverse tube 4A4 and the assembly that is connected with handle 4C in its outside by connector 4B, wherein: pedestal 4A is an entity wide outside and narrow inside, its upper surface is the inclined-plane 4A1 that side direction has the discrepancy in elevation, spring base 4A2 protrudes upward and passes inclined-plane 4A1 from pedestal 4A, it is centered close to the higher side of inclined-plane 4A1, its diameter is greater than the diameter of puncture needle base 4A3, the mesopore of puncture needle base 4A3 and the mesopore of transverse tube 4A4 are the 90 degree conductings of " L " type, puncture needle base 4A3 passes inclined-plane 4A1 and spring base 4A2 is tubular and tangent with the outer rim of spring base 4A2 from the center line of pedestal 4A, transverse tube 4A4 passes the pipe that pedestal 4A inwardly stretches out, its pipe end face is upwards inclined-plane long under the last weak point, the thickness of connector 4B between pedestal 4A and handle 4C is slightly larger than the wall thickness of overcoat 6, connector 4B is two continuous rectangles wide at the top and narrow at the bottom in the orthographic projection of the inside and outside side surface direction (being the direction in transverse tube 4A4 axle center) of pedestal 4A, the width on connector 4B top is greater than the width of pedestal 4A inner edge, width less than pedestal 4A outside, the height on connector 4B top is consistent with the height of pedestal 4A, be provided with groove 4C1 at handle 4C towards pedestal 4A one side and the position that is higher than end face on the connector 4B, the upper end of handle 4C for earlier outwards more upwards simultaneously also the corresponding side of low side with pedestal 4A ramp 4A1 have downward stretch out by diminishing gradually greatly button 4C2, the width of handle 4C is greater than the width of connector 4B and suitable with the outstanding width of the strip on the overcoat 6;

Overcoat 6 is a tubular thin-wall construction that has strip to give prominence to; The inboard width that strip is given prominence to is greater than the Breadth Maximum of the pedestal 4A on the Paracentesis needle holder 4; Have one to give prominence to corresponding with strip at its end face; Thin-walled; The similar oval-shaped body 6A that projects upwards; Be provided with downward slotted eye 6B in that the strip of overcoat 6 is outstanding; The width of slotted eye 6B is slightly larger than the width of the connector 4B on the Paracentesis needle holder 4 and less than the width in the pedestal 4A outside; The lower surface of slotted eye 6B is inclined end face 6B1; Its incline direction is opposite with the incline direction of the ramp 4A1 of pedestal 4A; Be provided with button platform 6C in the upper surface of slotted eye 6B; The shape of groove 4C1 on the shape of button platform 6C and the Paracentesis needle holder 4 is the same but size is slightly larger than the size of groove 4C1; The oblate pipe 6A1 that has circular hole 6A11 and have downwards and insert into the inner the chamber at the end face of excrescence 6A; In the whole combination of the present invention when the axis of Paracentesis needle holder 4 is parallel with the axis of overcoat 6; The center line of oblate pipe 6A1 overlaps with the center line of spring base 4A2; Simultaneously; The dead in line of circular hole 6A11 axis and puncture needle 2A; The maximum outside dimension of oblate pipe 6A1 is consistent with the external diameter of spring base 4A2; The diameter of circular hole 6A11 is slightly larger than the diameter of puncture needle base 4A3; Simultaneously consistent with the width of oblate pipe 6A1 endoporus and with a side superimposed of oblate pipe 6A1 endoporus; The end face of overcoat 6 have downwards and insert into the inner the pipeline in chamber L-shaped wear a bottle needle tubing seat 6D; Wearing bottle pipeline section that needle tubing seat 6D stretches out downwards is that tubular and axis overlap with the circular shaft line of overcoat 6; Wear transverse tube on bottle needle tubing seat 6D and be the shape of foreign side's inner circle; Its outer face is short in lower inclined plane 6D1 under the upper length, and the angle of inclination on the inclined-plane that makes progress of the transverse tube 4A4 end on the angle of inclination of lower inclined plane 6D1 and the pedestal 4A is consistent.

Fig. 2 is the present invention's structural representation before use, by this figure as can be known: gum cover 1 and wear bottle pin 2 all be contained in wear on bottle needle stand 6D on lower tube section, Capsule 3, Paracentesis needle holder 4, puncture needle 2A assembly places the interior space of overcoat 6, and make the needle point of puncture needle 2A be arranged in the space of oblate pipe 6A1 on the overcoat 6 by the relativeness of Paracentesis needle holder 4 and overcoat 6, spring 5 is slightly compressed is installed on the spring base 4A2 and the oblate pipe 6A1 on the overcoat 6 on the Paracentesis needle holder 4, at this moment, Paracentesis needle holder 4 will centrage one side to spring 5 deflect on tangential direction under the effect of spring 5, make the sensing of puncture needle 2A depart from the overcoat 6 circular hole 6A11 and to the opposite side (referring to Fig. 4) of oblate pipe 6A1 endoporus.

Fig. 3 is the present invention's structural representation in use, by this figure as can be known: when using, at first promote on the Paracentesis needle holder 4 the downward vertical section of button 4C2 with the hands side direction, make Capsule 3, Paracentesis needle holder 4, the angle rotary of puncture needle 2A assembly, simultaneously, the needle point of puncture needle 2A is by the opposite side that returns oblate pipe 6A1 endoporus on the overcoat 6 and point to circular hole 6A11, then, promote the handle 4C on the Paracentesis needle holder 4 again, engage with the platform 6C that buckles on the overcoat 6 until the groove 4C1 on the Paracentesis needle holder 4, at this moment, because the size of button platform 6C is slightly larger than the size of groove 4C1, so, with the superstability that keeps between Paracentesis needle holder 4 and the overcoat 6, simultaneously, the epimere of puncture needle base 4A3 on the Paracentesis needle holder 4 stretches out from circular hole 6A11, wear on the angled end-face of transverse tube 4A4 on the Paracentesis needle holder 4 and the overcoat 6 transverse tube on bottle needle tubing seat 6D to lower inclined plane 6D1 across Capsule 3 and pressing, Capsule 3 plays a part to make two inclined-plane driving fits, so just formed one from puncture needle 2A, Paracentesis needle holder 4, Capsule 3, wearing bottle needle tubing seat 6D has " Z " shape blood sampling passage of crack 3A to the centre of wearing bottle pin 2, afterwards, blood sampling work just can be carried out.

Fig. 4 is that the present invention reaches the structural representation when using back puncture needle deflection angle to avoid mistake to stretch out before use, by this figure as can be known: after blood sampling work is finished, only with hand is pulled the button 4C2 on the handle 4C, engaging between groove 4C1 and the button platform 6C opened, Capsule 3, Paracentesis needle holder 4, puncture needle 2A assembly will be got back under the effect of spring 5 in the inner chamber of overcoat 6 once more, simultaneously, because inclined-plane 4A1 on the Paracentesis needle holder 4 and the tilting action of the inclined end face 6B1 on spring 5 and the slotted eye 6B, Paracentesis needle holder 4 will tangentially deflect when getting back to slotted eye 6B lower end, at this moment, the needle point of puncture needle 2A is just in time got back in the interior space of the oblate pipe 6A1 on the overcoat 6, so the needle point sensing of puncture needle 2A will depart from circular hole 6A11 and can not arbitrarily stretch out from overcoat 6 again.

The disposable safe hemostix of the convenient use of the present invention has: clear in structure, shape system characteristics small and exquisite, safe in utilization, simultaneously, use is by the disposable safe hemostix of convenient use of the present invention, under the prerequisite that meets clinical use working specification, can reduce medical personnel's labor intensity, having tangible character of innovation, is the good solution that instructs this type of medical apparatus and instruments progress.

Claims

1. the present invention is by gum cover (1), wear a bottle pin (2), Capsule (3), Paracentesis needle holder (4), puncture needle (2A), spring (5) and overcoat (6) are formed, wherein: wear a bottle pin (2) and be bonded in wearing on bottle needle stand (6D) of overcoat (6), gum cover (1) is contained in to wear on bottle needle stand (6D) and will wear a bottle pin (2) and covers, Capsule (3) is contained on the transverse tube (4A4) on the Paracentesis needle holder (4), puncture needle (2A) is bonded on the puncture needle base (4A3) on the Paracentesis needle holder (4), spring (5) be enclosed within puncture needle (2A) outer and with Capsule (3), Paracentesis needle holder (4) and puncture needle (2A) place the interior space of overcoat (6) together;

Capsule (3) has crack (3A) for a mouthful end has the thin-wall construction that encircles muscle in its end;

The assembly of Paracentesis needle holder (4) on a pedestal (4A), being provided with ramp (4A1), spring base (4A2), puncture needle base (4A3) and transverse tube (4A4) and being connected with handle (4C) in its outside by connector (4B);

Overcoat (6) is a tube-like thin-wall structure that has strip to give prominence to, on its end face, have one with strip outstanding corresponding, thin-walled, similar oval-shaped project upwards body (6A) and downwards and insert into the inner the pipeline in chamber L-shaped wear a bottle needle tubing seat (6D), on the strip of overcoat (6) is outstanding, be provided with downward slotted eye (6B), the lower surface of slotted eye (6B) is inclined end face (6B1), be provided with button platform (6C) in the upper surface of slotted eye (6B), the oblate pipe (6A1) that on the end face of excrescence (6A), has circular hole (6A11) and have downwards and insert into the inner the chamber.

2. the disposable safe hemostix of convenient use according to claim 1, it is characterized in that: Capsule (3) can closely be fastened on the transverse tube (4A4) of Paracentesis needle holder (4), with the port on the transverse tube (4A4) so that the form sealing in crack (3A) to be arranged.

3. the disposable safe hemostix of convenient use according to claim 1, it is characterized in that: the pedestal (4A) on the Paracentesis needle holder (4) is an entity wide outside and narrow inside, its upper surface is the inclined-plane (4A1) that side direction has the discrepancy in elevation, spring base (4A2) protrudes upward and passes inclined-plane (4A1) from pedestal (4A), it is centered close to the higher side in inclined-plane (4A1), its diameter is greater than the diameter of puncture needle base (4A3), the mesopore of the mesopore of puncture needle base (4A3) and transverse tube (4A4) is the 90 degree conductings of " L " type, puncture needle base (4A3) passes inclined-plane (4A1) and spring base (4A2) is tubular and tangent with the outer rim of spring base (4A2) from the center line of pedestal (4A), transverse tube (4A4) is for passing the pipe that pedestal (4A) inwardly stretches out, its pipe end face is upwards inclined-plane long under the last weak point, the thickness that is positioned at the connector (4B) between pedestal (4A) and the handle (4C) is slightly larger than the wall thickness of overcoat (6), connector (4B) is in the inside and outside side surface direction of pedestal (4A), the orthographic projection that is transverse tube (4A4) axis direction is two continuous rectangles wide at the top and narrow at the bottom, the width on connector (4B) top is greater than the width of pedestal (4A) inner edge, width less than pedestal (4A) outside, the height on connector (4B) top is consistent with the height of pedestal (4A), the width of handle (4C) is greater than the width of connector (4B) and suitable with the outstanding width of the strip on the overcoat (6), at handle (4C) towards pedestal (4A) side and be higher than connector (4B) and go up the position of end face and be provided with groove (4C1), in addition, there is elder generation outwards upwards also a downward button (4C2) that stretches out by diminishing gradually greatly being arranged simultaneously again in the upper end of handle (4C) with the corresponding side of the low side of pedestal (4A) ramp (4A1).

4. according to claim 1 and claim 3: the inboard width that the strip on the overcoat (6) is given prominence to is greater than the Breadth Maximum of the pedestal (4A) on the Paracentesis needle holder (4), the width of slotted eye (6B) is slightly larger than the width of the connector (4B) on the Paracentesis needle holder (4) and less than the width in pedestal (4A) outside, the incline direction of inclined end face (6B1) is opposite with the incline direction of the ramp (4A1) of pedestal (4A), in entire combination of the present invention when the axis of Paracentesis needle holder (4) is parallel with the axis of overcoat (6), the central lines of the centrage of oblate pipe (6A1) and spring base (4A2), simultaneously, the dead in line of the axis of circular hole (6A11) and puncture needle (2A), the maximum outside dimension of oblate pipe (6A1) is consistent with the external diameter of spring base (4A2), the slightly larger in diameter of circular hole (6A11) is in the diameter of puncture needle base (4A3), simultaneously consistent with the width of oblate pipe (6A1) endoporus and with a side superimposed of oblate pipe (6A1) endoporus, the L-shaped bottle pipeline section that needle tubing seat (6D) stretches out downwards of wearing is that tubular and axis overlap with the circular shaft line of overcoat (6), wear transverse tube on bottle needle tubing seat (6D) and be the shape of square-outside and round-inside, its outer face is short in lower inclined plane (6D1) under the last length.

5. according to claim 1, claim 3 and claim 4: the shape of the groove (4C1) on shape and the Paracentesis needle holder (4) of button platform (6C) is the same but size is slightly larger than the size of groove (4C1), when groove (4C1) and button platform (6C) when engaging, to keep the superstability between Paracentesis needle holder (4) and the overcoat (6), simultaneously, the epimere of the puncture needle base (4A3) on the Paracentesis needle holder (4) stretches out from circular hole (6A11).

6. according to claim 1, claim 2, claim 3 and claim 4: the angle of inclination on upwards inclined-plane of wearing transverse tube (4A4) end on the angle of inclination of lower inclined plane (6D1) and pedestal (4A) on bottle transverse tube of needle tubing seat (6D) is consistent, Capsule (3) can make two inclined-planes keep driving fit, like this with regard to formed one from puncture needle (2A), Paracentesis needle holder (4), Capsule (3), " Z " shape of wearing bottle needle tubing seat (6D) and have crack (3A) passage of taking a blood sample to the centre of wearing a bottle pin (2).

7. according to claim 1, claim 3 and claim 4: because the tilting action of the inclined end face (6B1) on inclined-plane (4A1) on the Paracentesis needle holder (4) and spring (5) and the slotted eye (6B), Paracentesis needle holder (4) will tangentially deflect when getting back to slotted eye (6B) lower end, at this moment, the needle point of puncture needle (2A) is just in time got back in the interior space of the oblate pipe (6A1) on the overcoat (6), so the needle point of puncture needle (2A) points to will depart from circular hole (6A11).

8. the disposable safe hemostix of convenient use according to claim 1, it is characterized in that: when Paracentesis needle holder (4) is positioned at slotted eye (6B) upper end, spring (5) is in the high compression state, and when Paracentesis needle holder (4) is positioned at slotted eye (6B) lower end, spring (5) is in the mild compression state, and promptly spring (5) is in compressive state all the time.

9. according to claim 1, claim 3, claim 4 and claim 7: the present invention in use, can only be by making Paracentesis needle holder (4) revolution honest earlier, and then the method for releasing forward, puncture needle (2A) is stretched out from overcoat (6), otherwise puncture needle (2A) can not arbitrarily stretch out from overcoat (6).

10. according to claim 1, claim 3 and claim 4: pedestal (4A) on the Paracentesis needle holder (4) and handle (4C) can be realized the clamping to slotted eye (6B) both sides tube wall, Paracentesis needle holder (4) can be slided up and down in slotted eye (6B), and Paracentesis needle holder (4) can tangentially be realized the rotation of certain angle in the lower end of slotted eye (6B).