CN104721912A - Disposable blood vessel puncture-proof intravenous infusion needle - Google Patents

Disposable blood vessel puncture-proof intravenous infusion needle Download PDF

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Publication number
CN104721912A
CN104721912A CN201510135197.4A CN201510135197A CN104721912A CN 104721912 A CN104721912 A CN 104721912A CN 201510135197 A CN201510135197 A CN 201510135197A CN 104721912 A CN104721912 A CN 104721912A
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CN
China
Prior art keywords
needle
draw
blood vessel
conduit
draw point
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Legal status (The legal status 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 status listed.)
Granted
Application number
CN201510135197.4A
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Chinese (zh)
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CN104721912B (en
Inventor
邹最
王冶
蓝云娇
周苗
梁宵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Weimao Medical Technology Co., Ltd.
Second Military Medical University SMMU
Original Assignee
Jiangsu Yang Pu Medical Science And Technology Co Ltd
Second Military Medical University SMMU
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Application filed by Jiangsu Yang Pu Medical Science And Technology Co Ltd, Second Military Medical University SMMU filed Critical Jiangsu Yang Pu Medical Science And Technology Co Ltd
Priority to CN201510135197.4A priority Critical patent/CN104721912B/en
Publication of CN104721912A publication Critical patent/CN104721912A/en
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Publication of CN104721912B publication Critical patent/CN104721912B/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • A61M2005/1588Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body having means for monitoring, controlling or visual inspection, e.g. for patency check, avoiding extravasation

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (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)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The invention discloses a disposable blood vessel puncture-proof intravenous infusion needle. The disposable blood vessel puncture-proof intravenous infusion needle comprises a steel needle assembly and a guide tube assembly, wherein the steel needle assembly comprises a needle seat and a tubular steel needle, and the steel needle is fixedly connected to the needle seat; the guide tube assembly comprises a guide tube base and a guide tube, the guide tube is connected to the tubular guide tube base, and the steel needle penetrates through the guide tube base and is inserted into the guide tube. When the needle seat moves in the axial direction of the guide tube, the needle tip of the steel needle connected to the needle seat can stretch out of or retract from the end of the guide tube. An axial limiting structure and a radial limiting structure are arranged between the needle seat and the guide tube base. Thus, in the infusion process, the needle tip of the steel needle retracts into the guide tube. The needle tip of the steel needle will not puncture a blood vessel. After infusion is completed, the disposable blood vessel puncture-proof intravenous infusion needle is pulled out, and at the moment, the needle tip of the steel needle still stays in the guide tube. In the whole process, the needle tip of the steel needle will not injure medical staff or other people.

Description

A kind of disposable anti-blood vessel punch through style venoclysis needle
Technical field
The invention belongs to field of medical device, relate to a kind of disposable anti-blood vessel punch through style venoclysis needle.
Background technology
The existing venoclysis needle used is primarily of helmet, draw point, needle stand, pin fin, connection tube composition clinically.During use, medical personnel first take off the helmet covered on draw point, then draw point is used to carry out vein blood vessel puncture, see blood back and confirm to puncture successfully to infuse, in the whole process of transfusion, draw point stays Ink vessel transfusing always, but due to the needle point of draw point very sharp keen, patient unfolds limbs when infusing, and the probability being worn out blood vessel by draw point is very large, especially to child and psychotic; Transfusion needle is after infusion-completed, and the vein blood vessel of draw point from human body is extracted out by medical personnel, and the draw point speckling with patient blood is outside exposed, easily causes accidental injury and the infection of medical personnel and patient.
Summary of the invention
The invention provides a kind of disposable anti-blood vessel punch through style venoclysis needle, this disposable anti-blood vessel punch through style venoclysis needle and transfusion needle of the prior art in use easy unexpected problem of stabbing can be solved.
Technical scheme of the present invention comprises a kind of disposable anti-blood vessel punch through style venoclysis needle, and it comprises draw point assembly and conduit tube component, wherein:
Described draw point assembly comprises the draw point of needle stand and tubulose, and described draw point is fixedly connected on described needle stand;
Described conduit tube component comprises catheter block and conduit; Described tubes connection is in the catheter block of tubular, and described draw point passes described catheter block and is inserted in the inside of described conduit; When described needle stand is along the moving axially of described conduit, the needle point being connected to the described draw point of described needle stand can stretch out from the end of described conduit or retract, and is provided with axial limit structure and radial position limiting structure between described needle stand and described catheter block.
The further improvement of disposable anti-blood vessel punch through style venoclysis needle of the present invention is: described axial limit structure comprises buckle and fixture block, described buckle is arranged at the side of described needle stand near described catheter block highlightedly, described fixture block is arranged with described catheter block near the side of described needle stand, and the side of described buckle is provided with the draw-in groove coordinated with described fixture block; When described catheter block is close to by described needle stand, the needle point of described draw point stretches out from described sleeve; When described fixture block snaps in described draw-in groove, the needle point of described draw point is retracted the inside of described conduit.
The further improvement of disposable anti-blood vessel punch through style venoclysis needle of the present invention is: the dark draw-in groove that described axial limit structure comprises fixture block and supplies described fixture block to plug and shallow draw-in groove; Described fixture block is arranged at the side of described needle stand near described catheter block, and described dark draw-in groove and described shallow draw-in groove are arranged at the side of described catheter block near described needle stand, and the length of described dark draw-in groove is greater than the length of described shallow draw-in groove; When described fixture block is inserted in described dark draw-in groove completely, the needle point of described draw point stretches out from described conduit; When described fixture block is inserted in described shallow draw-in groove completely, the needle point of described draw point is retracted described conduit.
The further improvement of disposable anti-blood vessel punch through style venoclysis needle of the present invention is: described radial position limiting structure is the plug of column, described radial position limiting structure is inserted in the inside of the catheter block of tubular, described radial position limiting structure is provided with the limiting through hole coaxial with described conduit, and described draw point is arranged in described limiting through hole.
The further improvement of disposable anti-blood vessel punch through style venoclysis needle of the present invention is: described radial position limiting structure comprises needle holder core and at least two cushion rubbers, the needle holder core of described cylindrical shape is connected to the side of described needle stand near described catheter block, and described needle holder core is inserted in the inside of the described catheter block of tubular; Described cushion rubber is sheathed on the outside of described needle holder core, and is close to the inwall of described catheter block.
The further improvement of disposable anti-blood vessel punch through style venoclysis needle of the present invention is: described axial limit structure comprises hemisphere and helical orbit, described helical orbit is arranged at the side of described needle holder core, and the hemisphere being fixedly connected on the inwall of described catheter block is slidedly arranged on described helical orbit.
The further improvement of disposable anti-blood vessel punch through style venoclysis needle of the present invention is: described draw point assembly also comprises the pin fin of lamellar, and described pin fin is connected to the side of described needle stand.
The further improvement of disposable anti-blood vessel punch through style venoclysis needle of the present invention is: described catheter tip is coniform.
The further improvement of disposable anti-blood vessel punch through style venoclysis needle of the present invention is: the inside of described catheter block is provided with a lining core, described lining core is fixedly connected on the inwall of described catheter block and described conduit, and described lining core offers the through hole coaxial with described conduit.
The further improvement of disposable anti-blood vessel punch through style venoclysis needle of the present invention is: described draw point assembly also comprises connection tube, described connection tube be connected to described needle stand, described draw point and described connection tube are interconnected, and the end of described connection tube is connected with female Luer.
Technical scheme of the present invention has following technique effect: when pulling pin fin and make needle stand rotate after puncture of steel needles success, in the rotary course of needle stand, under the effect of hemisphere and helical orbit, is connected to the inside of the needle point retraction conduit of the draw point of needle stand.Like this in infusion process, the needle point of draw point can not wear out blood vessel, reduces the fear of patient, improves comfort level.After transfusion completes, extract disposable anti-blood vessel punch through style venoclysis needle, now the needle point of draw point is still in the inside of conduit, and in overall process, the syringe needle of draw point can not injure medical personnel and other staff.
Accompanying drawing explanation
Fig. 1 is disposable anti-blood vessel punch through style venoclysis needle of the present invention three-dimensional view in a first embodiment;
Fig. 2 is the three-dimensional view before disposable anti-blood vessel punch through style venoclysis needle of the present invention uses in a first embodiment;
Fig. 3 is the three-dimensional view after disposable anti-blood vessel punch through style venoclysis needle of the present invention uses in a first embodiment;
Fig. 4 is disposable anti-blood vessel punch through style venoclysis needle of the present invention three-dimensional view in a second embodiment;
Fig. 5 is disposable anti-blood vessel punch through style venoclysis needle of the present invention three-dimensional view in the third embodiment;
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this description can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by detailed description of the invention different in addition, and the every details in this description also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
Be introduced below in conjunction with first embodiment of accompanying drawing to disposable anti-blood vessel punch through style venoclysis needle of the present invention:
As shown in Figure 1, disposable anti-blood vessel punch through style venoclysis needle of the present invention comprises draw point assembly and conduit tube component, wherein:
Draw point assembly comprises the draw point 1-4 of connection tube 1-10, needle stand 1-5 and tubulose.Draw point 1-4 and connection tube 1-10 is all fixedly connected on needle stand 1-5, and draw point 1-4 and connection tube 1-10 is interconnected, and the end of connection tube 1-10 is connected with female Luer 1-11.The pin fin 1-6 of lamellar is connected with in the side of needle stand 1-5.
Conduit tube component comprises catheter block 1-3 and conduit 1-1.One end of conduit 1-1 is connected to the catheter block 1-3 of tubular, and its other end is coniform.The inside of catheter block 1-3 is provided with a lining core 1-2, and lining core 1-2 is fixedly connected on the inwall of catheter block 1-3, serves as a contrast core 1-2 simultaneously and is also connected to conduit 1-1.Lining core 1-2 offers the through hole coaxial with conduit 1-1, and the diameter of this through hole is slightly larger than the diameter of draw point 1-4.
One end of the catheter block 1-3 of tubular is connected with conduit 1-1, and its other end is opening.During installation, the draw point 1-4 of draw point assembly stretches into the inside of catheter block 1-3 by above-mentioned opening.Draw point 1-4 is finally inserted in the inside of conduit 1-1 through the through hole of catheter block 1-3 and lining core 1-2.When the needle stand 1-5 of draw point assembly is along the moving axially of conduit 1-1, the needle point being connected to the draw point 1-4 of needle stand 1-5 can stretch out from the end of conduit 1-1 or retract.Axial limit structure and radial position limiting structure is provided with between needle stand 1-5 and catheter block 1-3.
Radial position limiting structure comprises needle holder core 1-7, the first cushion rubber 1-8 and the second cushion rubber 1-9 in the present embodiment.Cylindric needle holder core 1-7 is connected to the side of needle stand 1-5 near catheter block 1-3 highlightedly.The axle center of needle holder core 1-7 is provided with the through hole passed for draw point 1-4, and the diameter of the outer wall of needle holder core 1-7 is slightly less than the diameter of catheter block 1-3 inwall.Needle holder core 1-7 is inserted in the inside of the catheter block 1-3 of tubular by the opening of catheter block 1-3 end.Needle holder core 1-7 is provided with two grooves kept at a certain distance away.Be individually fixed in above-mentioned two grooves around the first cushion rubber 1-8 and the second cushion rubber 1-9 that are sheathed on needle holder core 1-7.Above-mentioned groove can prevent the first cushion rubber 1-8 and the second cushion rubber 1-9 sliding axially along needle holder core.The inwall of catheter block 1-3 is close in the outside of the first cushion rubber 1-8 and the second cushion rubber 1-9, and the first cushion rubber 1-8 and the second cushion rubber 1-9 can play the effect of sealing.If when needle stand 1-5 is along the radial motion of catheter block 1-3, there is the risk fractureed in the draw point 1-4 be inserted in conduit 1-1, radial limiting device the axial-movement that needle stand 1-5 can be prevented along catheter block 1-3 is set, thus reduce the risk that draw point 1-4 fractures.
Axial limit structure comprises hemisphere 1-12 and helical orbit 1-13 in the present embodiment.Helical orbit 1-13 is arranged at the outer surface of needle holder core 1-7 sidewall, and the hemisphere 1-12 being fixedly connected on the inwall of catheter block 1-3 is slidedly arranged on helical orbit 1-13.Pulling pin fin 1-6 can make needle stand 1-5 rotate along its axis, and when needle stand 1-5 rotates around its axis, under the helical orbit of needle holder core 1-7 and the effect of hemisphere 1-12, needle holder core 1-7 is along the axially-movable of conduit 1-1.When needle stand 1-5 moves along the axis guide base of conduit 1-1, the needle point being connected to the draw point 1-4 of needle stand 1-5 stretches out from the cone shape end of conduit 1-1.When opposite direction rotates needle stand 1-5, needle stand 1-5 moves in the opposite direction, the inside of the needle point retraction conduit 1-1 of draw point 1-4.
Be introduced below in conjunction with first embodiment of accompanying drawing to disposable anti-blood vessel punch through style venoclysis needle using method of the present invention:
As shown in Figure 2, when the disposable anti-blood vessel punch through style venoclysis needle of the present embodiment does not use, needle stand 1-5 is close to catheter block 1-3, and the needle point of draw point 1-4 stretches out from the cone shape end of conduit 1-1.During use, the needle point of draw point 1-4 is thrust blood vessel, simultaneously the conduit 1-1 be placed on outside draw point 1-4 is thrust blood vessel in the lump.The end of conduit 1-1 is coniform, and this shape is convenient to conduit 1-1 together to thrust blood vessel with the needle point of draw point 1-4.
As shown in Figures 2 and 3, pull pin fin 1-6 successfully when draw point 1-4 punctures needle stand 1-5 is rotated, in the rotary course of needle stand 1-5, under the effect of hemisphere 1-12 and helical orbit 1-13, be connected to the inside of the needle point retraction conduit 1-1 of the draw point 1-4 of needle stand 1-5.Like this in infusion process, the needle point of draw point 1-4 can not wear out blood vessel, reduces the fear of patient, improves comfort level.After transfusion completes, extract disposable anti-blood vessel punch through style venoclysis needle, now the needle point of draw point 1-4 is still in the inside of conduit 1-1, and in overall process, the syringe needle of draw point 1-4 can not injure medical personnel and other staff.
Be introduced below in conjunction with second embodiment of accompanying drawing to disposable anti-blood vessel punch through style venoclysis needle of the present invention:
As shown in Figure 4, disposable anti-blood vessel punch through style venoclysis needle of the present invention comprises draw point assembly and conduit tube component, wherein:
Draw point assembly comprises the draw point 2-4 of needle stand 2-5 and tubulose.Draw point 2-4 is fixedly connected on needle stand 2-5.The pin fin 2-6 of lamellar is connected with in the side of needle stand 2-5.
Conduit tube component comprises catheter block 2-3 and conduit 2-1.One end of conduit 2-1 is connected to the catheter block 2-3 of tubular, and its other end is coniform.The inside of catheter block 2-3 is provided with a lining core 2-2, and lining core 2-2 is fixedly connected on the inwall of catheter block 2-3, serves as a contrast core 2-2 simultaneously and is also connected to conduit 2-1.Lining core 2-2 offers the through hole coaxial with conduit 2-1, and the diameter of this through hole is slightly larger than the diameter of draw point 2-4.
One end of the catheter block 2-3 of tubular is connected with conduit 2-1, and its other end is opening.During installation, the draw point 2-4 of draw point assembly stretches into the inside of catheter block 2-3 by above-mentioned opening.Draw point 2-4 is finally inserted in the inside of conduit 2-1 through the through hole of catheter block 2-3 and lining core 2-2.When the needle stand 2-5 of draw point assembly is along the moving axially of conduit 2-1, the needle point being connected to the draw point 2-4 of needle stand 2-5 can stretch out from the end of conduit 2-1 or retract.Axial limit structure and radial position limiting structure 2-22 is provided with between needle stand 2-5 and catheter block 2-3.
Radial position limiting structure 2-22 is the plug of column in the present embodiment, and radial position limiting structure 2-22 is inserted in the inside of the catheter block 2-3 of tubular, and the sidewall of radial position limiting structure 2-22 is close to the inwall of catheter block 2-3.Radial position limiting structure 2-22 is provided with the limiting through hole coaxial with conduit 2-1, and the diameter of this limiting through hole is slightly larger than the diameter of draw point 2-4, and draw point 2-4 is arranged in business and lives limiting through hole.If when needle stand 2-5 is along the radial motion of catheter block 2-3, there is the risk fractureed in the draw point 2-4 be inserted in conduit 2-1, radial position limiting structure 2-22 arranges the axial-movement that needle stand 2-5 can be prevented along catheter block 2-3, thus the risk that reduction draw point 2-4 fractures.
Axial limit structure comprises fixture block 2-12 and the dark draw-in groove 2-13 that plugs for fixture block 2-12 and shallow draw-in groove 2-14 in the present embodiment.Fixture block 2-12 is arranged at the side of needle stand 2-5 near catheter block 2-3 highlightedly.Dark draw-in groove 2-13 and shallow draw-in groove 2-14 is arranged at the side of catheter block 2-3 near needle stand 2-5.Dark draw-in groove 2-13 is greater than the length of shallow draw-in groove 2-14 along catheter block 2-3 axis along the length of catheter block 2-3 axis.When fixture block 2-12 is inserted in dark draw-in groove 2-13 completely, the needle point of draw point 2-4 stretches out from conduit 2-1.When fixture block 2-12 is inserted in shallow draw-in groove 2-14 completely, between needle stand 2-5 and catheter block 2-3, keep certain distance, now the needle point retraction conduit 2-1 of draw point 2-4.
Be introduced below in conjunction with second embodiment of accompanying drawing to disposable anti-blood vessel punch through style venoclysis needle using method of the present invention:
When the disposable anti-blood vessel punch through style venoclysis needle of the present embodiment does not use, the fixture block 2-12 on needle stand 2-5 is inserted in the inside of dark draw-in groove 2-13, and the needle point of draw point 2-4 stretches out from the cone shape end of conduit 2-1.During use, the needle point of draw point 2-4 is thrust blood vessel, simultaneously the conduit 2-1 be placed on outside draw point 2-4 is thrust blood vessel in the lump.The end of conduit 2-1 is coniform, and this shape is convenient to conduit 2-1 together to thrust blood vessel with the needle point of draw point 2-4.
Pull pin fin 2-6 when draw point 2-4 punctures successfully, the fixture block 2-12 on needle stand 2-5 is extracted from dark draw-in groove 2-13, subsequently this fixture block 2-12 is inserted in shallow draw-in groove 2-14.After the fixture block 2-12 of needle stand 2-5 inserts shallow draw-in groove 2-14, be connected to the inside of the needle point retraction conduit 2-1 of the draw point 2-4 of needle stand 2-5.Like this in infusion process, the needle point of draw point 2-4 can not wear out blood vessel, reduces the fear of patient, improves comfort level.After transfusion completes, extract disposable anti-blood vessel punch through style venoclysis needle, now the needle point of draw point 2-4 is still in the inside of conduit 2-1, and in overall process, the syringe needle of draw point 2-4 can not injure medical personnel and other staff.
Be introduced below in conjunction with the 3rd embodiment of accompanying drawing to disposable anti-blood vessel punch through style venoclysis needle of the present invention:
As shown in Figure 5, the main distinction of the 3rd embodiment and the first embodiment is axial limit structure.In the present embodiment, axial limit structure comprises buckle 3-13 and fixture block 3-12.Buckle 3-13 is arranged at the side of needle stand 3-5 near catheter block 3-3 highlightedly, and fixture block 3-12 is arranged at the side of catheter block 3-3 near needle stand 3-5.The side of buckle 3-13 is provided with the draw-in groove 3-14 coordinated with fixture block 3-12.When needle stand 3-5 is close to catheter block 3-3, the needle point of draw point 3-4 stretches out from conduit 3-1; When fixture block 3-12 snaps in the draw-in groove 3-14 of buckle 3-13 side, needle stand 3-5 and catheter block 3-3 maintains a certain distance, now the inside of the needle point retraction conduit 3-1 of draw point 3-4.
Be introduced below in conjunction with the 3rd embodiment of accompanying drawing to disposable anti-blood vessel punch through style venoclysis needle using method of the present invention:
When the disposable anti-blood vessel punch through style venoclysis needle of the present embodiment does not use, needle stand 3-5 is close to catheter block 3-3, and the needle point of draw point 3-4 stretches out from the cone shape end of conduit 3-1.During use, the needle point of draw point 3-4 is thrust blood vessel, simultaneously the conduit 3-1 be placed on outside draw point 3-4 is thrust blood vessel in the lump.The end of conduit 3-1 is coniform, and this shape is convenient to conduit 3-1 together to thrust blood vessel with the needle point of draw point 3-4.
Pull pin fin 3-6, mobile needle stand 3-5 when draw point 3-4 punctures successfully, make the fixture block 3-12 on catheter block 3-3 snap in the draw-in groove 3-14 of buckle 3-13 side.After fixture block 3-12 snaps in draw-in groove 3-14 inside, maintain a certain distance between needle stand 3-5 and catheter block 3-3, be connected to the inside of the needle point retraction conduit 3-1 of the draw point 3-4 of needle stand 3-5.Like this in infusion process, the needle point of draw point 3-4 can not wear out blood vessel, reduces the fear of patient, improves comfort level.After transfusion completes, extract disposable anti-blood vessel punch through style venoclysis needle, now the needle point of draw point 3-4 is still in the inside of conduit 3-1, and in overall process, the syringe needle of draw point 3-4 can not injure medical personnel and other staff.
The above is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, not departing from the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims (10)

1. a disposable anti-blood vessel punch through style venoclysis needle, is characterized in that comprising draw point assembly and conduit tube component, wherein:
Described draw point assembly comprises the draw point of needle stand and tubulose, and described draw point is fixedly connected on described needle stand;
Described conduit tube component comprises catheter block and conduit; Described tubes connection is in the catheter block of tubular, and described draw point passes described catheter block and is inserted in the inside of described conduit; When described needle stand is along the moving axially of described conduit, the needle point being connected to the described draw point of described needle stand can stretch out from the end of described conduit or retract, and is provided with axial limit structure and radial position limiting structure between described needle stand and described catheter block.
2. disposable anti-blood vessel punch through style venoclysis needle as claimed in claim 1, it is characterized in that: described axial limit structure comprises buckle and fixture block, described buckle is arranged at the side of described needle stand near described catheter block highlightedly, described fixture block is arranged with described catheter block near the side of described needle stand, and the side of described buckle is provided with the draw-in groove coordinated with described fixture block; When described catheter block is close to by described needle stand, the needle point of described draw point stretches out from described sleeve; When described fixture block snaps in described draw-in groove, the needle point of described draw point is retracted the inside of described conduit.
3. disposable anti-blood vessel punch through style venoclysis needle as claimed in claim 1, is characterized in that: the dark draw-in groove that described axial limit structure comprises fixture block and supplies described fixture block to plug and shallow draw-in groove; Described fixture block is arranged at the side of described needle stand near described catheter block, and described dark draw-in groove and described shallow draw-in groove are arranged at the side of described catheter block near described needle stand, and the length of described dark draw-in groove is greater than the length of described shallow draw-in groove; When described fixture block is inserted in described dark draw-in groove completely, the needle point of described draw point stretches out from described conduit; When described fixture block is inserted in described shallow draw-in groove completely, the needle point of described draw point is retracted described conduit.
4. disposable anti-blood vessel punch through style venoclysis needle as claimed in claim 1, it is characterized in that: described radial position limiting structure is the plug of column, described radial position limiting structure is inserted in the inside of the catheter block of tubular, described radial position limiting structure is provided with the limiting through hole coaxial with described conduit, and described draw point is arranged in described limiting through hole.
5. disposable anti-blood vessel punch through style venoclysis needle as claimed in claim 1, it is characterized in that: described radial position limiting structure comprises needle holder core and at least two cushion rubbers, the needle holder core of described cylindrical shape is connected to the side of described needle stand near described catheter block, and described needle holder core is inserted in the inside of the described catheter block of tubular; Described cushion rubber is sheathed on the outside of described needle holder core, and is close to the inwall of described catheter block.
6. disposable anti-blood vessel punch through style venoclysis needle as claimed in claim 5, it is characterized in that: described axial limit structure comprises hemisphere and helical orbit, described helical orbit is arranged at the side of described needle holder core, and the hemisphere being fixedly connected on the inwall of described catheter block is slidedly arranged on described helical orbit.
7. disposable anti-blood vessel punch through style venoclysis needle as claimed in claim 1, is characterized in that: described draw point assembly also comprises the pin fin of lamellar, and described pin fin is connected to the side of described needle stand.
8. disposable anti-blood vessel punch through style venoclysis needle as claimed in claim 1, is characterized in that: described catheter tip is coniform.
9. disposable anti-blood vessel punch through style venoclysis needle as claimed in claim 1, it is characterized in that: the inside of described catheter block is provided with a lining core, described lining core is fixedly connected on the inwall of described catheter block and described conduit, and described lining core offers the through hole coaxial with described conduit.
10. disposable anti-blood vessel punch through style venoclysis needle as claimed in claim 1, it is characterized in that: described draw point assembly also comprises connection tube, described connection tube be connected to described needle stand, described draw point and described connection tube are interconnected, and the end of described connection tube is connected with female Luer.
CN201510135197.4A 2015-03-26 2015-03-26 A kind of disposable anti-blood vessel punch through style intravenous infusion needle Active CN104721912B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106924839A (en) * 2015-12-30 2017-07-07 江苏阳普医疗科技有限公司 A kind of safe intravenous infusion needle and its implementation
CN107049600A (en) * 2017-05-26 2017-08-18 西安医学院第二附属医院 A kind of ear drum membrane therapeutic system
CN107789702A (en) * 2016-08-31 2018-03-13 江苏阳普医疗科技有限公司 A kind of safety-type medical trocar with pumpback guide structure
CN107789040A (en) * 2016-08-31 2018-03-13 江苏阳普医疗科技有限公司 A kind of safety-type medical trocar with position limiting structure
CN110141255A (en) * 2019-06-19 2019-08-20 北京光耀世纪医疗科技有限公司 Hemostix

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Publication number Priority date Publication date Assignee Title
CN106924839A (en) * 2015-12-30 2017-07-07 江苏阳普医疗科技有限公司 A kind of safe intravenous infusion needle and its implementation
CN107789702A (en) * 2016-08-31 2018-03-13 江苏阳普医疗科技有限公司 A kind of safety-type medical trocar with pumpback guide structure
CN107789040A (en) * 2016-08-31 2018-03-13 江苏阳普医疗科技有限公司 A kind of safety-type medical trocar with position limiting structure
CN107789040B (en) * 2016-08-31 2024-01-16 上海长征医院 Safe medical trocar with limit structure
CN107049600A (en) * 2017-05-26 2017-08-18 西安医学院第二附属医院 A kind of ear drum membrane therapeutic system
CN107049600B (en) * 2017-05-26 2023-09-22 西安医学院第二附属医院 Eardrum membrane treatment device
CN110141255A (en) * 2019-06-19 2019-08-20 北京光耀世纪医疗科技有限公司 Hemostix

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