WO2011160445A1 - Seringue médicale de sécurité - Google Patents

Seringue médicale de sécurité Download PDF

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Publication number
WO2011160445A1
WO2011160445A1 PCT/CN2011/001051 CN2011001051W WO2011160445A1 WO 2011160445 A1 WO2011160445 A1 WO 2011160445A1 CN 2011001051 W CN2011001051 W CN 2011001051W WO 2011160445 A1 WO2011160445 A1 WO 2011160445A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
spring
hole
push rod
latch
Prior art date
Application number
PCT/CN2011/001051
Other languages
English (en)
Chinese (zh)
Inventor
张亚平
Original Assignee
Zhang Yaping
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhang Yaping filed Critical Zhang Yaping
Publication of WO2011160445A1 publication Critical patent/WO2011160445A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A61M2005/3241—Needle retraction energy is accumulated inside of a hollow plunger rod
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston

Definitions

  • the present invention relates to a medical device, and more particularly to a medical safety syringe for tissue puncture and its post-puncture administration or extraction of tissue specimens. Background technique
  • the self-destructing syringes of various structures can only be destroyed by the existing syringes, so that they cannot be used again, but the needles cannot be used.
  • Safety protection and destruction we know that - secondary use of the ejector and secondary use of the injection needle respectively to two different products, each (M) according to the standard; syringe is a container and measuring tools
  • the injection needle is a puncture device, which needs to be used in the first 3 ⁇ 4, ⁇ , '/: dosing or extracting the passage of the tissue specimen, and through the channel for the delivery of the drug solution or the collection of the tissue specimen; the degree of risk is very ⁇ .
  • the method of injecting the needle by the spring in In: The structure of the spring at the needle seat (mainstream program at home and abroad) makes the ["1 receiving back and the needle seat have a body structure. Once the syringe is shipped, it cannot be used again. Replace the needle; Because the clinical situation makes the Sichuan environment not the same, the specifications of the injection needle are different.
  • the syringe that can not change the injection needle brings urinating to the user; the needle ' ⁇ ; is fixed in the needle holder once in the production process, The needle seat is randomly installed in the spring protection device, and the direction of the tip edge of the needle tip can not be adjusted one time. After the end of production, the direction of the edge of the needle tip cannot be adjusted with the volume of the outer cylinder of the syringe.
  • the blade is required to be 1:
  • the syringe When the blood is injected into the blood vessel, it is necessary to observe the scale line when injecting a certain dose of the drug solution. At this time, since the direction of the cutting edge may be opposite to the scale line, the syringe must be rotated again. When you see the tick marks, this process is very easy to cause the needle tip to puncture the blood vessels to form a leak or the needle tip pierces the blood vessel, making the puncture failure. Also: If the needle cannot be replaced, in a state of emergency such as a first-aid environment, the blood sample cannot be collected using this syringe.
  • CN92109192.3 announced "a safety syringe for secondary use", the technical feature of which is the structure of the needle-retracting needle of the separation of the shrinkage needle seat of the Chuanchuan).
  • the disadvantage is that the different structures of the rubber plug are utilized.
  • the mutual engagement of the needle holders to achieve the locking of the plunger of the syringe and the activation of the safety features, today, the solution is not well implemented, because the elastic activity 3 ⁇ 4 - 4: If the seal, it should bear the fitting trigger, limit It is difficult to fix the position, and the inventor himself is not well realized today.
  • Zhonghao Patent: CN200710031083.0 discloses a method of setting one end 3 ⁇ 4 outer 3 ⁇ 4/li shrinking spring in the inner cavity of the push rod.
  • the basic technical features are the same as above, there is some improvement, the needle can be replaced.
  • the insufficient ⁇ needle tip edge 1 - 1 cannot be fixed and is in any state.
  • the technical solutions of the various safety syringes described above all have a certain deficiency, so that the product has a zero limit in Linchuan and cannot be popularized.
  • the invention of the invention is a medical safety syringe capable of solving the above-mentioned deficiencies.
  • the technical solution of the present invention is as follows: a mountain needle assembly, a syringe assembly, a needle edge limiting positioning structure, and an injection needle automatic recovery protection structure.
  • the needle is automatically recovered and protected by a structure, a latch, a recovery spring and a push rod.
  • the spring is a positive coil spring, and one end is regularly curled, and the W-end is a wire rod tip abducting, so that the spring outer ring diameter is larger than the push.
  • the annular protrusions are fastened and braked by the inner hole of the front end of the push rod; they are statically mounted in the central space of the front end of the push rod after being unmoved, and after the successful puncture, injection or collection treatment, the injection needle is pulled out, and the needle tip is observed.
  • the spring is near the tip end of the tip of the wire, so that the spring of the ring has a large diameter in the center of the push rod, and if the spring moves toward the front end of the push rod
  • the tip of the spring wire will pierce or be inserted into the side wall of the inner hole of the push rod, so that the spring cannot move to the left and right, so that the injection needle tip is limited and cannot be exposed again.
  • the spring (6) has a compression length equal to the length of the lower edge of the latch (7) (7c) to the length of its annular projection (7b), which is 3-5 mm, and the length after the spring is released 13-15mm. Due to the use of the variable-diameter spring structure, the length of the spring is greatly shortened to become a standard accessory, that is, the material cost is saved, and the length thereof is no longer restricted by the K-degree of the needle, and the length of the spring portion of the latch-supporting spring is not affected. The pinch length of the injection needle is not reduced to 5 ⁇ , which also makes: the production enterprise does not [? Need to 'iS prepare a variety of different specifications of the needle seat, different L ⁇ : degree of spring and no
  • the IMJ-length lock door reduces the investment in molds, tooling, and equipment by introducing the injection tube of In'j (size) length, which results in greatly reduced production cost and simplified production process. Easy to manufacture and simple to implement.
  • the needle positioning restriction structure is completed by the outer needle seat having a square hole and the inner needle seat having a square body in the upper half.
  • the tip of the needle tip and the inner needle seat at the front end of the square body are uniformly positioned.
  • the outer needle seat has a square hole, which ensures the uniformity of the direction of the injection needle edge.
  • the center hole of the front end of the outer cylinder is formed on the inner base portion, and four small tab-shaped protrusions are formed, and the base portion and the inner wall of the center hole are weakly connected to each other to form a pedicle-like protrusion, which constitutes a pair of inner needle holders.
  • the support force can meet the requirements of the needle tip to the puncture force of the tissue, generally not large j ON: the safety syringe, when not in use, the needle structure is not associated with the automatic needle recovery device, so that the present invention
  • the needle can be changed as needed before use, which is convenient for clinical use.
  • the yoghurt safety syringe has a syringe assembly consisting of an outer cylinder, a push rod and an end plug and a piston; the piston is embedded in the front end of the push rod, and the interference fit is slidingly sealed with the inner wall of the outer cylinder; the upper end of the outer cylinder is made standard
  • the screw interface of the Ruhr structure communicates with the inner cavity of the outer cylinder through the central hole of the screw joint, and the lower end of the outer cylinder is abducted to constitute an operation handle, and below the handle, the outer shaft extension K _ is fixed, forming a push rod pressing handle
  • the concealed jacket; the piston has a hole in the hole, and there are a plurality of rings l u lffi in the hole, and the outer annular protrusion of the front end of the push-pull is fitted with an annular groove on the inner and outer sides of the upper half of the piston, which is convenient for living.
  • the needle assembly is composed of a needle tube, an inner needle seat, an outer needle seat, a sealing ring between the inner and outer needle holders, and a needle tip sheath;
  • the inner needle seat has a through hole
  • the inner needle of the inner needle seat and the inner side of the inner needle seat have a square column shape, the lower half is hollow, and the inner side of the lower edge has a ring-shaped narrowing protrusion;
  • the inner hole of the lower needle seat is a standard 6% taper hole, '3 Cartridge front end standard Ruhr screw interface matching
  • the sealing ring is placed deep in the inner hole of the lower end of the outer needle seat and tightly sealed with the inner needle.
  • the outer edge of the lower end of the outer needle seat has a luer structure, and the upper end of the outer needle seat is a square inner hole, which is matched with the front end of the inner needle seat.
  • the medical safety syringe of the invention adopts a variable diameter magazine structure, so that the length of the spring is greatly shortened to become a standard accessory, that is, the material cost is saved, the length thereof is no longer pinned by the length of the needle tube, and the latch supports the spring segment.
  • the length is also not restricted by the length of different injection needles.
  • the mountain adopts an automatic recovery needle structure consisting of a mountain spring, a latch and a push rod inner hole.
  • the device is located at the front end of the center hole of the push rod, and its spring-end tip is abducted, and the diameter of the front end of the spring after the abduction is larger than the push rod.
  • the diameter of the inner hole makes the intrinsic safety device U ⁇ :
  • the automatic protection device of the injection needle is small in size and covered by the piston, which makes the appearance of the product beautiful, and is accepted for use with the ordinary injector.
  • the limit of the needle tip is fixed and easy to operate. After the end of the injection treatment, press the ") button to start the safety device H, and the needle can be automatically recycled into the inner hole of the push rod for shielding and fixing, no exposure, safety protection Mj.
  • the invention adopts the structure of S-recovery needle tip and effectively maintains it.
  • the needle and the needle tip can be accurately and effectively prevented, thereby avoiding the risk of the nurse being stabbed, avoiding the medical staff and others.
  • Personnel are stabbed by injection needles and pose a risk of infection and disease transmission.
  • the structure in which the injection needle holder and the needle automatic recovery device are separated is adopted, so that the safety injector proposed by the present technology "changes the injection needle, so that the application range is no longer limited, and it is easy to popularize.
  • FIG. 1 is a schematic exploded view showing the overall composition of a medical safety syringe of the present invention
  • m 3 is a schematic diagram of the inner needle seat structure of the medical pump of the invention.
  • 1 ⁇ 1 4 is a schematic diagram of the relationship between the injection needle support structure and the automatic tip recovery structure of the medical safety syringe of the present invention
  • I winter I 6 is a schematic diagram of the structure of the medical safety syringe of the present invention in the recovery spring;
  • the medical safety syringe of the present invention consists of: a needle tip sheath 0, an outer needle seat 1, a needle tube 2, a sealing ring 3, an inner needle seat 4, a living 3 ⁇ 4 5, a spring 6, a latch 7,
  • the end plug 8, the push rod 9, and the outer cylinder 10 are combined.
  • the sheath 0, the outer needle seat 1, the needle tube 2, the sealing ring 3, and the inner needle seat 4 together constitute an injection needle assembly; the sheath 0 is usually placed on the outer surface of the outer needle holder 1, and the needle tip at the front end of the needle tube 2 is protected from collision damage.
  • the front end of the needle tube 2 has a sharp cutting edge 2a ;
  • the sealing ring 3 is made of an elastic plastic material, and functions as a friction seal between the inner and outer needle holders; as shown in Fig. 3, the inner needle holder 4 has a hole 4a in the center, and the front end of the hole is viscous.
  • the needle tube 2, the rear half of the inner needle seat 4 is hollow, the inner edge of the rear end has an annular protrusion 4b, the front half of the inner needle seat 4 is V. the force shape 4c, and the front end of the inner needle seat 1 is a square hole la (see Fig.
  • the needle tube 2 is adhered to the front end in the center hole 4a of the inner needle holder 4, and the inner needle holder 4 is frictionally fitted in the outer needle holder 1 by the sealing ring 3 to constitute the injection needle i4i of the present invention.
  • the front end of the simple 10 has a Luer screw connection [" 10a, and the core hole 10b communicates with the outer cylinder inner cavity.
  • front end of the push rod 9 has several annular projection 9a, can be fitted with a number of mating annular groove of the piston 5 inside
  • the tail eversion of the push rod 9 is expanded into a curved shape pressing handle %, the push rod is hollow, the front inner hole diameter is smaller than the middle rear inner hole diameter, and the rear end has a stepped enlarged hole 9c, which can be matched with the end plug 8 :
  • the spring 6 is connected to the rear-end coil spring structure, and the front-end wire end ⁇ 6a is abducted (see I winter 16), and the diameter of the wire head 6a after abduction is larger than the diameter of the middle of the inner hole of the push rod 9.
  • the outer needle holder 1 of the medical safety syringe of the present invention is an outer needle holder 1 of the medical safety syringe of the present invention
  • the outer edge of the rear end of the outer needle holder 1 is a luer structure protrusion lc
  • the inner hole at the rear end is a standard 6% taper circular hole
  • the circular hole has a circular groove lb at the depth.
  • the front end of the outer needle holder 1 has a square hole la, which is in communication with the rear end circular hole
  • the outer needle holder 1 can be screwed to the Luer interface 10a (see Fig. 1) at the front end of the syringe outer cylinder 10: '' ⁇ .
  • I 4 is the structure of the injection needle assembly of the medical safety syringe of the present invention installed after the outer cylinder 10 Luer interface 10a Fig.:
  • the inner needle holder 4 is assembled in the outer needle holder 1 through the sealing ring 3, and then fixed to the front end of the syringe outer cylinder 10 by the outer needle holder 1 and the front end of the outer cylinder 10, which is connected to the front end of the syringe outer cylinder 10.
  • At the rear end of 4 that is, at least four small pieces of the bottom inner edge of the inner hole 10b of the outer cylinder cone are pedestal protrusions 10c, and the inner needle holder 4 is supported to maintain the stability of the inner needle holder 4 in the injection needle assembly.
  • the inner needle seat 4 When there is a certain puncture force, the inner needle seat 4 is not loosened and slipped out of the outer tube 10; the piston 5 is fitted on the annular protrusion 9a at the front end of the set push rod 9 (please refer to FIG. 1 and FIG. 4), and is installed in the outer cylinder of the syringe. 10
  • the inner chamber is tightly slipped - the lock door 7 has a spring 6 and the spring 6 is compressed and then with the latch 7 through the annular projection 7b in the middle of the latch (see the cabinet 5).
  • the outer edge Fixed at the front end of the inner hole of the push rod 9; at the rear end of the push rod 9, the outer edge is formed to form a bolus T-handle %, and the outer edge of the handle % has an arc spherical surface (curved surface), and the end surface of the handle 9c is enlarged. In the hole, an end plug 8 is assembled.
  • I winter 15 is a schematic structural view of the latch 7 of the medical safety syringe of the present invention.
  • a protruding enlarged portion 7a having a slit at the center thereof, which facilitates the inner hole 4b with the rear end of the inner needle seat 4 (see Fig. 3) Deformation insertion at the time of fitting;
  • the lower end of the latch 7 is hollow, and the lower edge has an outwardly turned edge 7c, which can carry a spring
  • Figure 6 is a schematic view showing the structure of the recovery spring of the medical safety syringe of the present invention
  • the spring 6 is a forward conventional coil spring, but at the end, the steel pitch is gradually enlarged, the front end of the steel wire 6a is abducted, and the outer diameter of the spring is abducted.
  • the length of the spring 6 needs to be greater than the sum of the distance between the lower edge of the latch 7 and the outer edge of the latch 7c 3 ⁇ 4 needle 2 h, generally not less than 40-70 mm; (the length of the injection needle is generally 16 in size) 38mm range + needle seat length 10-12mm + latch length 1 5- 1 8mm), the length of the latch 7 should be able to fully compress the spring 6 after it is compressed, otherwise it will not be guaranteed to be exposed again after the needle tip is retracted.
  • the number of turns of the elastic ⁇ 6 is 5-7 turns, the length can be reduced to 12-15 mm, and only 3-5 mm long after compression, the length is no longer pinned by the needle W 2 K degree, and the lock is simultaneously
  • the length of the bolt-supporting spring section is also not restricted by the length of the different injection needle tubes, and is uniformly shortened to a value within the range of 3-5 mm and is as long as the compression length of the spring, and can also be hidden in the piston 4 at the front end of the push rod, so that Product attention; the requirement of spring force is only required to be greater than the sum of the weight of the needle seat and the needle tube, which can drive the needle) ⁇ . 4 and the automatic retraction of the needle tip 2, and can reduce the release pressure band due to the conventional spring.
  • I 'J can' j I liquid spill or splash phenomenon, reducing the safety factor of safe syringe use.
  • m 9 is a small intent of the structure in which the injection needle of the yoghurt safety syringe of the present invention is automatically recovered into the inner cavity of the push rod and is in a holding state; in Fig. 7, Fig. 8, in the process of pressing the push rod 9, the piston
  • the front end of the 5 has a bad groove 5a, 5b in the structure, under the condition of a certain force: for example, the deformation of the syringe after the end of the injection and the strong pressing of the push rod 9 when the safety characteristic is excited, the front end of the piston 5 will be deformed and contracted.
  • the push rod 9 and the latch 7 have sufficient air I'Hj deep into the inner hole of the cone (the center hole of the outer cylinder 10) 10b, due to the incompressibility of the inner needle holder 4 and the latch 7, continue to press
  • the Jk push rod 9 inevitably separates the locking of the lock door 7 from the push rod 9.
  • the spring 6 loses the elastic force instantaneous release, so that the latch 7 can drive the inner needle holder 4 and the needle tube 2 to be quickly retracted elastically to the push rod 9, and the elastic force of the spring 6 is very high.
  • the abduction ⁇ 6a of the spring f spring 6 is released, and its diameter is larger than the diameter of the inner hole of the push rod (ct Td ⁇ ⁇ .), if the push rod 9 end moves, the wire tip 6a is pierced or embedded in the inner wall of the push rod 9 to form a fixed, so that the inner needle seat 4 and the injection needle ⁇ 2 are [ ⁇ ' ⁇
  • the tail f-handle of the push rod 9 is curved, lii, ⁇ : when pushing the rear extension tube 10e of the outer tube 10 of the incident device, the edge of the curved surface of the handle is completely submerged, so that the pusher 9 cannot be pulled out again. This allows for a one-time use limit.
  • the medical safety syringe of the invention adopts a multi-layer composite safety structure of automatic retraction protection of the injection needle, positioning of the needle edge, support of the needle seat, and automatic clamping of the elastic release, so that the structure of the solution is reasonable, safe and reliable, and conforms to the clinical medical operation specification.
  • Treated V. Requirements In the medical safety syringe, the tip end of the recovery spring is abducted, so that the outer diameter of the ring is larger than the inner diameter of the push rod, and the spring is compressed and the latch is braked by the front end of the push rod inner hole; after pressing, the push rod is pressed or pulled out The needle is pressed against the push rod again to compress and deform the piston.
  • the front end of the latch cuts the support piece on the inner wall of the center hole at the front end of the outer tube, so that the inner needle seat loses the support, and the front end of the latch is fitted with the annular protrusion of the inner hole of the inner needle seat.
  • the spring Pressing the pressure to release the latch from the inner hole of the front end of the push rod, the spring is emitted to drive the latch, the inner needle seat, and the needle tip is retracted to the rear end of the inner hole of the push rod, so that the needle tip Fully covered; 1 spring near the tip of the needle wire abduction, the spring moves toward the tip of the needle, the tip of the wire will be embedded in the inner side of the push rod 3 ⁇ 4, thus braking the latch, so that the needle tip can not be exposed out; the inner needle seat
  • the half portion has a square shape, and the outer needle seat ⁇ -end has a hole, and the two form a needle edge positioning structure; the structure of the needle holder and the needle tip automatic recovery device is separated, so that the present invention can change the injection needle as needed before use.
  • the length of the spring is greatly shortened into a standard accessory, which saves the material cost, the length of which is no longer restricted by the length of the injection needle tube, and the length of the spring portion of the latch support is not affected.
  • the pinning of different injection needle lengths is shortened to 3-5mm, which also eliminates the need for manufacturers to prepare a variety of needle holders of different specifications, springs of different lengths and latches of different lengths to fit different (specification) length injection needles.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne une seringue médicale de sécurité comprenant un ensemble aiguille, un ensemble seringue, une structure de positionnement et de limite de bord de coupe à embout d'aiguille et une structure de protection et de rétraction automatique de l'aiguille. La structure de protection et de rétraction automatique de l'aiguille comprend un verrouillage (7) et un ressort (6). L'extrémité embout d'une extrémité du ressort (6) s'étend vers l'extérieur, ceci pouvant arrêter le verrouillage (7) et empêcher l'embout de l'aiguille de s'échapper et de faire saillie. L'ensemble aiguille comprend une base d'aiguille intérieure (4) et une base d'aiguille extérieure (1). La demie partie avant de la base d'aiguille intérieure (4) est configurée avec un corps de forme carrée (4c), l'extrémité avant de la base d'aiguille extérieure (1) comprend un trou de forme carrée (1a), et le corps de forme carrée (4c) et le trou de forme carrée (1a) forment la structure de positionnement et de limite de bord de coupe à embout d'aiguille, ceci facilitant le positionnement d'un bord de coupe à embout d'aiguille (2a) et la base d'aiguille intérieure (4) de manière uniforme.
PCT/CN2011/001051 2010-06-24 2011-06-24 Seringue médicale de sécurité WO2011160445A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201020237543.2 2010-06-24
CN2010202375432U CN201701572U (zh) 2010-06-24 2010-06-24 医用安全注射器

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Publication Number Publication Date
WO2011160445A1 true WO2011160445A1 (fr) 2011-12-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160331358A1 (en) * 2013-12-13 2016-11-17 Intuitive Surgical Operations, Inc. Telescoping biopsy needle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201701572U (zh) * 2010-06-24 2011-01-12 张亚平 医用安全注射器
US10420878B2 (en) 2015-11-19 2019-09-24 Guangdong Haiou Medical Apparatus Co., Ltd. Syringe assembly
CN108211051B (zh) * 2018-01-08 2024-02-23 汕头华尔怡医疗器械有限公司 一种可换针头式回缩型安全注射器
CN108338852A (zh) * 2018-03-16 2018-07-31 鲁恩赐 一次性兽医注射器

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