CN104740719A - Bent bag venous indwelling needle having double pressure functions - Google Patents

Bent bag venous indwelling needle having double pressure functions Download PDF

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Publication number
CN104740719A
CN104740719A CN201510167028.9A CN201510167028A CN104740719A CN 104740719 A CN104740719 A CN 104740719A CN 201510167028 A CN201510167028 A CN 201510167028A CN 104740719 A CN104740719 A CN 104740719A
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China
Prior art keywords
base
pipe
flexible tube
capsule
indwelling
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CN201510167028.9A
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Chinese (zh)
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张亚根
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Individual
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Priority to CN201510167028.9A priority Critical patent/CN104740719A/en
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    • 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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • 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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • A61M2005/1587—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body suitable for being connected to an infusion line after insertion into a patient
    • 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
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/0007—Special media to be introduced, removed or treated introduced into the body
    • 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
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/04—Liquids
    • 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
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/12—Blood circulatory system

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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)

Abstract

A bent bag venous indwelling needle having double pressure functions consists of an indwelling hose, an indwelling hose seat, a bag tube cap, a puncturing needle tube, and a puncturing needle tube holder. After finished the infusion and removed the connecting steel needle, the bag tube cap is stabilized inside a space between a bending plate and a baseplate on the indwelling hose seat by bending the bag tube cap, accordingly a positive pressure in consistency with the infusion direction is formed by bending the bag tube cap. When the next infusion begins, the bag tube cap is released from the bent state, a negative pressure opposite to the infusion direction is generated when the bag tube cap restores depending on its own characteristics. Due to the fact that the space variation generated by bending the bag tube cap is greater than the internal space volume of the indwelling hose and is also greater than the volume of the connecting steel needle, the non-heparin tube sealing can be achieved by using the positive pressure, and the utilization of the negative pressure can check whether the indwelling hose is blocked.

Description

There is the curved capsule venous detaining needle of two compression functions
Technical field:
The present invention relates to a kind of medical apparatus and instruments for infusion liquid, a kind of for the curved capsule venous detaining needle with two compression functions in the Ink vessel transfusing indwelling phase to Intravascular infusions liquid after venipuncture procedure and puncture thereof specifically.
Background technology:
Nearly all medicinal liquid can be inputted human body by blood vessel by transfusion, realizes treatment and prophylactic order.In clinical; usually can because of periodic treatment plan; the long-term infusion treatment mode adopting puncture patient's blood vessel; as the chemotherapy of tumor, cardiovascular and cerebrovascular diseases and the factor such as children's, old people's blood vessel (sclerosis, fragility increase) condition difference, increase venipuncture difficulty and increase the misery that patient is punctured, even can destroy because of the repeatedly puncture showing shallow blood vessel; and can not again puncture; affect infusion treatment, and need the method for taking deep vessels to cut, realize treatment.The damage causing blood vessel for avoiding repeatedly puncturing and to reduce patient painful, generally uses iv cannule technology.It is exactly the technical scheme (apparatus) by arranging a soft tube pin at metal puncture pin outer surface, in vascular puncture process, soft tube pin is brought into blood vessel, then pulls out metal puncture pin, and soft tube pin is retained in Ink vessel transfusing.The iv cannule of present Clinical practice is made up of heparin sealing cap, puncture needle, Paracentesis needle holder, indwelling soft tube pin, indwelling needle, indwelling needle-protecting sleeve mostly.They can complete vascular puncture process and the indwelling of indwelling soft tube pin in artery and vein vascular (bury and stay) substantially; But the iv cannule used now but has following defect and deficiency:
One is: in the process using retention needle infusion, owing to being mostly have pin to connect, while pulling out connection pin, remaining needle inner chamber must be made to form certain negative pressure, can cause in indwelling needle tubing and vessel inner blood refluxes and enters in indwelling needle tubing.Can blood coagulation be there is, form embolus, make remaining needle channel blockage, destroy remaining needle passage, when next time uses, so, heparin just must be used to carry out tube sealing, like this, just virtually add the financial burden of sufferer.
Two are: increase medical care labor intensity, in the process using heparin in sealing, need medical personnel to follow certain operation sequence and suitable technical training, simultaneously, also because the patient of some blood coagulation mechanism obstacle, because haemolysis bleeding risk can not use anticoagulant, make it apply and be restricted.
Chinese patent: CN200100190.6 discloses a kind of lamellar valve being provided with a pair wedge shape in sleeve pipe, can prevent the iv cannule of blood back flow.Chinese patent: CN200620080001.2 discloses the another kind of method automatically preventing blood backflow excessive, be provided with and conducting support at the tail intracavity of indwelling needle, rubber seal flow channel for liquids, run through under external force (transfusion device or syringe or conduit socket) effect by means of conducting support (sleeve pipe), conducting again, but be not set forth in after the sockets such as transfusion device pull out, how conducting support therefrom departs from, the structure again sealed, so this technical scheme can only meet unique once use of remaining needle and fluid pipeline interface.
At present, the technology also not seeing the venous detaining needle of the so simple perfect in shape and function of structure is disclosed.
Summary of the invention:
The curved capsule venous detaining needle with two compression functions of the present invention by: indwelling flexible pipe, indwelling flexible tube base, capsule pipe cap, puncture needle tubing and puncture needle base form; Wherein, form indwelling part by indwelling flexible pipe, indwelling flexible tube base and capsule pipe cap, puncture needle tubing and puncture needle base composition puncturing needle part.It is characterized in that: the function that the capsule pipe cap in indwelling part not only plays sealing, spikes through, simultaneously, rely on the material behavior of capsule pipe cap self can realize passive bending and reply, the size variation of its inner space can also be realized, and the malleation consistent with infusion direction or the negative pressure contrary with infusion direction (namely pair press) is produced in actual use according to needing, malleation is used for exempting from heparin in sealing, negative pressure for observe exempt from heparin in sealing effect to verify whether indwelling flexible pipe blocks.
The indwelling flexible tube base had in the curved capsule venous detaining needle of two compression functions of the present invention is multistage tubular type, and the external diameter of its last single order pipe is less than the external diameter of rank second from the bottom pipe, and the external diameter of rank second from the bottom pipe is maximum; Be provided with the two panels base plate of the symmetry outwards born from the external diameter bottom of rank second from the bottom pipe, between two panels base plate, have gap; There is certain distance between the external diameter of base plate and last single order pipe, and be greater than the half of the external diameter difference of last two rank pipes; Two panels base plate corresponds to the flap that the position of the last two rank pipes on indwelling flexible tube base is also stretched out to the inside after outermost place is respectively equipped with upwards rise.
The capsule pipe cap had in the curved capsule venous detaining needle of two compression functions of the present invention is the pipe cap shape that one end is closed, and is made up of elastomeric material; The half of the external diameter difference of the last two rank pipes on its wall thickness and indwelling flexible tube base is suitable, and its internal diameter is slightly less than the external diameter of the last single order pipe on indwelling flexible tube base, and its length is greater than the length of the last single order pipe on indwelling flexible tube base; When the last single order pipe on indwelling flexible tube base is socketed by mouth of pipe one end of capsule pipe cap completely, on capsule pipe cap do not have be socketed part can realize self bending (bending amplitude is maximum can reach 180 degree); When bending occurs capsule pipe cap, the changing value of its inner space is greater than the interior spatial volume of indwelling flexible pipe, is also greater than the draw point volume of special connection needle set simultaneously.
The puncture needle base had in the curved capsule venous detaining needle of two compression functions of the present invention is two rank tubuloses, the external diameter of front rank pipe is greater than the external diameter of rear rank pipe, oval handle is respectively equipped with in the outside of front rank pipe, be provided with the clip that forward stretch out consistent with puncture needle base axis in the front end of oval handle, be provided with in the front end of clip and protrude upward snap fit; The internal diameter of the front rank pipe on puncture needle base is slightly larger than the external diameter of capsule pipe cap, and the internal diameter of rear rank pipe is suitable with the external diameter of puncture needle tubing; The width (distances namely between two clip outermost surface) that two clips open is slightly less than the ultimate range between the bifoldable plate on indwelling flexible tube base, and the distance between two clips is slightly larger than the maximum outside diameter of indwelling flexible tube base; The upper-lower height of two clips is slightly less than the free height between bifoldable plate on indwelling flexible tube base and two panels base plate; The length of two clips is slightly larger than the length in the axial direction of the bifoldable plate on indwelling flexible tube base; Go up in the axial direction, suitable with the distance from the flap front end indwelling flexible tube base to capsule pipe cap (when the last single order pipe on indwelling flexible tube base being socketed completely in mouth of pipe one end of capsule pipe cap) rear end face to the distance of faying face in Guan Yuhou rank, the front rank pipe puncture needle base from the faying face of clip and snap fit; When puncture needle base moves in the axial direction from back to front, and time in space between the bifoldable plate two clips stretched on indwelling flexible tube base and two base plates, after the material deformation of clip and stress, the engaging between indwelling flexible tube base with puncture needle base can be realized; The front bottom end of two clips, in arc upwards gradually, can by the handle above carried on puncture needle base and the form that move in a circle backward, make clip and snap fit free from the state of the engaging between the bifoldable plate indwelling flexible tube base;
The indwelling flexible pipe had on the curved capsule venous detaining needle of two compression functions of the present invention is arranged on indwelling flexible tube base, and capsule pipe cap is socketed on the last single order pipe on indwelling flexible tube base, and puncture needle tubing is bonded on puncture needle base; Puncture needle tubing on the puncturing needle part of puncture needle tubing and puncture needle base composition can pass from the center of the indwelling part be made up of indwelling flexible pipe, indwelling flexible tube base and capsule pipe cap, now, snap fit on puncture needle base can engage with the flap on indwelling flexible tube base, when puncturing needle part is removed from indwelling part by needs, only have can by carry puncture needle base and do circular motion backward and just may realize.
When the curved capsule venous detaining needle with two compression functions of the present invention is used for the treatment of, held puncture needle base before this and punctured, when puncturing successfully and after smooth removal puncture needle tubing, re-using special connection needle set and thrust capsule pipe cap and infuse; After treatment completes, after special connection needle set is removed, with hands, the capsule pipe cap in indwelling part is done reverse bending to the either side flap on indwelling flexible tube base, and the capsule pipe cap after bending is embedded in the space be made up of flap and base plate on indwelling flexible tube base, like this, the capsule pipe cap after bending is by bending state stable for maintenance one in the space be made up of flap and base plate on indwelling flexible tube base; Meanwhile, because capsule pipe cap there occurs bending, the liquid of its inside will produce a malleation consistent with infusion direction and flow to indwelling flexible pipe along with the reduction in space, can complete the positive pressure tube sealing of no-rod tractor thus; When again needing transfusion, only the capsule pipe cap of bending need be transferred to from the space be made up of flap and base plate indwelling flexible tube base, now, because capsule pipe cap returns back to original state by relying on the characteristic of own material, simultaneously, increase with the space in capsule pipe cap and produce a negative pressure contrary with infusion direction, and the effect of no-rod tractor tube sealing can be observed thus and verify whether indwelling flexible pipe has the phenomenon of blocking to occur.
In technical scheme proposed by the invention, the function adding two compression functions (realizing malleation and negative pressure with reply by bending) and indwelling flexible tube base due to capsule pipe cap function on the basis of traditional airtight and puncture-resistant adds the function of the bending state of stable capsule pipe cap being originally connected, on fixing basis, the present invention is had and more simplifies intensive characteristic, also achieve and form with less parts the invention original intention come compared with Multifunctional design expection; Apply the troublesome operation that the curved capsule venous detaining needle with two compression functions of the present invention not only can avoid heparin in sealing, simultaneously, also can be avoided the complicated structure form of existing band positive pressure connector (there is spring construction) commercially, simultaneously, also there is compact conformation, understand, the characteristic of sufferer comfortable wearing.
The structure that the present invention so simplifies is unprecedented; Two pressure concepts proposed by the invention are also unprecedented; Technical scheme of the present invention not only has sufferer comfortable wearing and alleviates the effect of medical personnel's labor intensity, and also have the characteristic of saving manufacturing cost and enhancing productivity, having original novelty, is the new technical scheme in remaining needle technical field simultaneously.
Noun is had a guide look of:
1: indwelling flexible pipe 2: indwelling flexible tube base 2A: last single order pipe 2B: base plate
2C: flap 3: capsule pipe cap 4: puncture needle tubing 5: puncture needle base
5A: front rank pipe 5B: rear rank pipe 5C: handle 5D: clip
5D1: snap fit
Accompanying drawing illustrates:
Fig. 1 is that structure of the present invention launches schematic diagram.
Fig. 2 is the longitudinal vertical cut-away schematic view before combinative structure of the present invention uses.
Fig. 3 is the vertical equity generalized section before combinative structure of the present invention uses.
Fig. 4 is the vertical equity generalized section of (again before infusion) after combinative structure of the present invention uses.
Fig. 5 is longitudinal vertical cut-away schematic view of snap-fit relationship between the indwelling flexible tube base of combinative structure of the present invention and puncture needle base.
Specific embodiment:
Fig. 1 is that structure of the present invention launches schematic diagram, it can thus be appreciated that, the curved capsule venous detaining needle with two compression functions of the present invention is made up of indwelling flexible pipe 1, indwelling flexible tube base 2, capsule pipe cap 3, puncture needle tubing 4 and puncture needle base 5, wherein: indwelling flexible pipe 1 and capsule pipe cap 3 are arranged on common composition indwelling part on indwelling flexible tube base 2, and puncture needle tubing 4 is bonded on puncture needle base 5 and forms puncturing needle part; Puncture needle tubing 4 can pass from the center of indwelling part, and puncture needle base 5 can engage with the indwelling flexible tube base 2 in indwelling part; It is characterized in that:
Indwelling flexible tube base 2 is in multistage tubular type, and the external diameter of its last single order pipe 2A is less than the external diameter of rank second from the bottom pipe, and the external diameter of rank second from the bottom pipe is maximum; Be provided with the two panels base plate 2B of the symmetry outwards born from the external diameter bottom of rank second from the bottom pipe, between two panels base plate 2B, have gap; There is certain distance between the external diameter of base plate 2B and last single order pipe 2A, and be greater than the half of the external diameter difference of last two rank pipes; Two panels base plate 2B corresponds to the flap 2C that the position of the last two rank pipes on indwelling flexible tube base 2 is also stretched out to the inside after outermost place is respectively equipped with upwards rise.
The pipe cap shape that capsule pipe cap 3 is closed in one end, is made up of elastomeric material; The half of the external diameter difference of the last two rank pipes on its wall thickness and indwelling flexible tube base 2 is suitable, and its internal diameter is slightly less than the external diameter of the last single order pipe 2A on indwelling flexible tube base 2, and its length is greater than the length of the last single order pipe 2A on indwelling flexible tube base 2; When the last single order pipe 2A on indwelling flexible tube base 2 is socketed by mouth of pipe one end of capsule pipe cap 3 completely, on capsule pipe cap 3 do not have be socketed part can realize self bending (bending amplitude is maximum can reach 180 degree).
Puncture needle base 5 is in two rank tubuloses, the external diameter of front rank pipe 5A is greater than the external diameter of rear rank pipe 5B, oval handle 5C is respectively equipped with in the outside of front rank pipe 5A, be provided with the clip 5D that forward stretch out consistent with puncture needle base 5 axis in the front end of oval handle 5C, be provided with in the front end of clip 5D and protrude upward snap fit 5D1; The internal diameter of the front rank pipe 5A on puncture needle base 5 is slightly larger than the external diameter of capsule pipe cap 3, and the internal diameter of rear rank pipe 5B is suitable with the external diameter of puncture needle tubing 4; The width (distances namely between two clip 5D outermost) that two clip 5D open is slightly less than the ultimate range between the bifoldable plate 2C on indwelling flexible tube base 2, and the distance between two clip 5D is slightly larger than the maximum outside diameter of indwelling flexible tube base 2; The upper-lower height of two clip 5D is slightly less than the free height between bifoldable plate 2C on indwelling flexible tube base 2 and two panels base plate 2B; The length of two clip 5D is slightly larger than the bifoldable plate 2C length in the axial direction on indwelling flexible tube base 2; Go up in the axial direction, in from the faying face of clip 5D and snap fit 5D1 to the front rank pipe 5A puncture needle base 5 and rear rank pipe 5B, the distance of faying face is suitable with the distance from the flap 2C front end indwelling flexible tube base 2 to capsule pipe cap 3 (when being socketed completely by the last single order pipe 2A on indwelling flexible tube base 2 in mouth of pipe one end of capsule pipe cap 3) rear end face; When puncture needle base 5 moves in the axial direction from back to front, and time in space between the bifoldable plate 2C two clip 5D stretched on indwelling flexible tube base 2 and two base plate 2B, after the material deformation of clip 5D and stress, the engaging between indwelling flexible tube base 2 with puncture needle base 5 can be realized; The front bottom end of two clip 5D, can by the handle 5C that above carries on puncture needle base 5 and the form that move in a circle backward in arc upwards gradually, make clip 5D and snap fit 5D1 from and the bifoldable plate 2C indwelling flexible tube base 2 between engaging state in free;
Fig. 2 is the longitudinal vertical cut-away schematic view before combinative structure of the present invention uses, Fig. 3 is the vertical equity generalized section before combinative structure of the present invention uses, two figure are known thus: the technology of the present invention produce product export time, indwelling flexible pipe 1 and capsule pipe cap 3 are installed on indwelling flexible tube base 2, and puncture needle tubing 4 is bonded on puncture needle base 5; Puncture needle tubing 4 passes from the center of indwelling flexible pipe 1, indwelling flexible tube base 2 and capsule pipe cap 3, and puncture needle base 5 engages with indwelling flexible tube base 2; Meanwhile, the back segment of capsule pipe cap 3 enters in the interior space of the front rank pipe 5A on puncture needle base 5 to keep stable.
Fig. 4 is the vertical equity generalized section of (again before infusion) after combinative structure of the present invention uses, it can thus be appreciated that: when the product produced by the technology of the present invention completes infusion of therapeutic after pulling out connection needle set first, with hands, the capsule pipe cap 3 in indwelling part is done reverse bending to the either side flap 2C on indwelling flexible tube base 2, and the capsule pipe cap 3 after bending is embedded in the space be made up of flap 2C and base plate 2B on indwelling flexible tube base 2, like this, the capsule pipe cap 3 after bending is by bending state stable for maintenance one; Meanwhile, because capsule pipe cap 3 there occurs bending, the liquid of its inside will produce a malleation consistent with infusion direction and flow to indwelling flexible pipe 1 along with the reduction in space, can complete the positive pressure tube sealing of no-rod tractor thus; When again needing transfusion, only the capsule pipe cap 3 of bending need be transferred to from the space be made up of flap 2C and base plate 2B indwelling flexible tube base 2, now, because capsule pipe cap 3 returns back to original state by relying on the characteristic of own material, simultaneously, increase with the space in capsule pipe cap 3 and produce a negative pressure contrary with infusion direction, and the effect of no-rod tractor tube sealing can be observed thus and verify whether indwelling flexible pipe 2 has the phenomenon of blocking to occur.
Fig. 5 is longitudinal vertical cut-away schematic view of snap-fit relationship between the indwelling flexible tube base of combinative structure of the present invention and puncture needle base, it can thus be appreciated that: the front bottom end of the clip 5D on puncture needle base 5 is in arc upwards gradually, when puncture needle base 5 travels forward in the axial direction, and when two clip 5D are stretched in the space between bifoldable plate 2C on indwelling flexible tube base 2 and two base plate 2B, after the material deformation of clip 5D and stress, the engaging between indwelling flexible tube base 2 with puncture needle base 5 can be realized; When piercing portions is pulled out by needs, the handle 5C that can hold on puncture needle base 5 passes through above to carry and the form moved in a circle backward, is freed by piercing portions from the state of the engaging between indwelling part.

Claims (6)

1. one kind has the curved capsule venous detaining needle of two compression functions, be made up of indwelling flexible pipe (1), indwelling flexible tube base (2), capsule pipe cap (3), puncture needle tubing (4) and puncture needle base (5), wherein: indwelling flexible pipe (1) and capsule pipe cap (3) are arranged on the upper common composition indwelling part of indwelling flexible tube base (2), and puncture needle tubing (4) is bonded on puncture needle base (5) and forms puncturing needle part; Puncture needle tubing (4) can be passed from the center of indwelling part, and puncture needle base (5) can engage with the indwelling flexible tube base (2) in indwelling part; It is characterized in that:
Indwelling flexible tube base (2) is in multistage tubular type, and the external diameter of its last single order pipe (2A) is less than the external diameter of rank second from the bottom pipe, and the external diameter of rank second from the bottom pipe is maximum; Be provided with the two panels base plate (2B) of the symmetry outwards born from the external diameter bottom of rank second from the bottom pipe, between two panels base plate (2B), have gap; There is certain distance between the external diameter of base plate (2B) and last single order pipe (2A), and be greater than the half of the external diameter difference of last two rank pipes; The flap (2C) that the position of the last two rank pipes on indwelling flexible tube base (2) is also stretched out to the inside after outermost place is respectively equipped with upwards rise is above corresponded at two panels base plate (2B);
The pipe cap shape that capsule pipe cap (3) is closed in one end, is made up of elastomeric material;
Puncture needle base (5) is in two rank tubuloses, the external diameter of front rank pipe (5A) is greater than the external diameter on rear rank pipe (5B), oval handle (5C) is respectively equipped with in the outside of front rank pipe (5A), be provided with the clip (5D) that forward stretch out consistent with puncture needle base (5) axis in the front end of oval handle (5C), be provided with in the front end of clip (5D) and protrude upward snap fit (5D1).
2. according to the said curved capsule venous detaining needle with two compression functions of claim 1, it is characterized in that: the half of the external diameter difference of the last two rank pipes on the wall thickness of capsule pipe cap (3) and indwelling flexible tube base (2) is suitable, its internal diameter is slightly less than the external diameter of the last single order pipe (2A) on indwelling flexible tube base (2), and its length is greater than the length of the last single order pipe (2A) on indwelling flexible tube base (2); When the last single order pipe (2A) on indwelling flexible tube base (2) is socketed by mouth of pipe one end of capsule pipe cap (3) completely, on capsule pipe cap (3) do not have be socketed part can realize self bending (bending amplitude is maximum can reach 180 degree); When bending occurs capsule pipe cap (3), the changing value of its inner space is greater than the interior spatial volume of indwelling flexible pipe (1), is also greater than the volume of connection draw point simultaneously.
3. according to the said curved capsule venous detaining needle with two compression functions of claim 1, it is characterized in that: the external diameter of internal diameter slightly larger than capsule pipe cap (3) of (5A) is managed on the front rank on puncture needle base (5), the internal diameter of rear rank pipe (5B) is suitable with the external diameter of puncture needle tubing (4); The distance of the width that two clips (5D) open that is between two clips (5D) outermost, be slightly less than the ultimate range between the bifoldable plate (2C) on indwelling flexible tube base (2), the distance between two clips (5D) is slightly larger than the maximum outside diameter of indwelling flexible tube base (2); The upper-lower height of two clips (5D) is slightly less than the free height between bifoldable plate (2C) on indwelling flexible tube base (2) and two panels base plate (2B); The length of two clips (5D) is slightly larger than bifoldable plate (2C) length in the axial direction on indwelling flexible tube base (2); When the last single order pipe (2A) on indwelling flexible tube base (2) being socketed completely in mouth of pipe one end of capsule pipe cap (3), go up in the axial direction, manage (5A) with the faying face of snap fit (5D1) to the front rank puncture needle base (5) from clip (5D) and manage the distance of the interior faying face of (5B) with suitable to the distance of capsule pipe cap (3) rear end face from flap (2C) front end indwelling flexible tube base (2) with rear rank; The front bottom end of two clips (5D) is in arc upwards gradually.
4. according to claim 1 and the said curved capsule venous detaining needle with two compression functions of claim 2, it is characterized in that: when bending occurs capsule pipe cap (3), a malleation consistent with infusion direction can be produced, and a negative pressure contrary with infusion direction can be produced when capsule pipe cap (3) relies on the characteristic of self to reply by bending state time.
5. according to claim 1 and the said curved capsule venous detaining needle with two compression functions of claim 3, it is characterized in that: when puncture needle base (5) moves in the axial direction from back to front, and time in space between the bifoldable plate (2C) two clips (5D) stretched on indwelling flexible tube base (2) and two base plates (2B), after the material deformation of clip (5D) and stress, the engaging between indwelling flexible tube base (2) with puncture needle base (5) can be realized; Because the front bottom end of two clips (5D) is in arc upwards gradually, can by above carrying handle (5C) on puncture needle base (5) and the form moved in a circle backward, make clip (5D) and snap fit (5D1) from and the bifoldable plate (2C) indwelling flexible tube base (2) between engaging state in free.
6. according to the said curved capsule venous detaining needle with two compression functions of claim 1, it is characterized in that: the capsule pipe cap (3) after can holding bending in the bifoldable plate (2C) on indwelling flexible tube base (2) and the space between two base plates (2B) also makes the bending state of capsule pipe cap (3) keep stable.
CN201510167028.9A 2015-04-10 2015-04-10 Bent bag venous indwelling needle having double pressure functions Pending CN104740719A (en)

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Application Number Priority Date Filing Date Title
CN201510167028.9A CN104740719A (en) 2015-04-10 2015-04-10 Bent bag venous indwelling needle having double pressure functions

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Application Number Priority Date Filing Date Title
CN201510167028.9A CN104740719A (en) 2015-04-10 2015-04-10 Bent bag venous indwelling needle having double pressure functions

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CN104740719A true CN104740719A (en) 2015-07-01

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973565A (en) * 1973-07-20 1976-08-10 Everett Medical Products Limited Winged cannula with skin securing means
CN201625260U (en) * 2010-03-03 2010-11-10 丁京叔 Infusion apparatus capable of generating negative pressure
CN102824666A (en) * 2012-09-26 2012-12-19 张亚根 Sack clamp venous indwelling needle with dual-pressure function

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973565A (en) * 1973-07-20 1976-08-10 Everett Medical Products Limited Winged cannula with skin securing means
CN201625260U (en) * 2010-03-03 2010-11-10 丁京叔 Infusion apparatus capable of generating negative pressure
CN102824666A (en) * 2012-09-26 2012-12-19 张亚根 Sack clamp venous indwelling needle with dual-pressure function

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