CN103785078A - Vein needle - Google Patents
Vein needle Download PDFInfo
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- CN103785078A CN103785078A CN201410079981.3A CN201410079981A CN103785078A CN 103785078 A CN103785078 A CN 103785078A CN 201410079981 A CN201410079981 A CN 201410079981A CN 103785078 A CN103785078 A CN 103785078A
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- needle
- support
- intravenous needle
- safety device
- buckle
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Abstract
The invention belongs to the field of medical apparatuses and instruments, particularly relates to a vein needle for an infusion apparatus and aims at providing a safety vein needle which causes blood return during the first-time puncture and prevents blood return during backflow under certain condition after the first-time puncture. The scheme is that the vein needle consists of a needle seat, a needle head, a catheter connected with the needle seat and the needle head and a safety device, wherein the safety device consists of a liquid inlet tube, an upper cover, a housing, a through hole, a seal ring, a support, a one-way sheet, a lower cover, a liquid outlet tube and a fastener. The vein needle has the advantages that the visible blood return during first-time puncture is achieved, when liquid in the catheter flows back again, the safety device prevents liquid medicine in the catheter at the needle head end from flowing back after the first-time puncture and accordingly prevent blood from flowing back and prevent empty dripping, meanwhile the working amount of nursing workers is decreased, the operation is convenient, and the time and labor are saved.
Description
Technical field
The invention belongs to medical instruments field, particularly transfusion device intravenous needle.
Background technology
At present, the intravenous needle of common disposable transfusion device is made up of the conduit of needle stand, syringe needle and connection needle stand and syringe needle.Before transfusion, the air of medical personnel in can first emptying transfusion device, and close actuator, puncture see after blood back by syringe needle again along vein inserting needle a little, so complete being connected of medicinal liquid and human vein.Puncture is first shown in that the step of blood back is essential, is the mark that medical personnel are successfully punctured to vein.After having infused, needs of patients finds medical personnel to operate to change liquid or finishes infusion treatment, and in this process, in the time that patient does not find in time that medicinal liquid is totally lost or medical personnel do not arrive in the very nick of time and processes, the liquid in conduit can occur to flow backwards and cause blood back.Blood back makes patient produce psychological doubt and fear to a certain extent, causes the negative effect for the treatment of.
Summary of the invention
The object of this invention is to provide the one visible blood-flow that punctures first, and the safety intravenous needle of blood return prevention while occurring first flowing backwards in some situation.
The present invention adopts following technical proposals to realize: intravenous needle is made up of conduit and the safety device of needle stand, syringe needle, connection needle stand and syringe needle.Safety device is by feed tube, upper cover, shell, through hole, sealing ring, support, unidirectional thin slice, lower cover, drain pipe, buckle composition.Upper cover is useful on and sets up the feed tube being connected with conduit outside, lower cover is useful on and sets up the drain pipe being connected with conduit outside, upper cover and shell form an inner chamber, inner chamber is communicated with feed tube, on shell, there is through hole, via design is more than 2 or 2, the gross area of through hole is 1 ~ 10 square millimeter, support and through hole have cross hang structure near end, for fixing unidirectional thin slice, unidirectional thin slice adopts medical silica-gel, or medical grade rubber, or medical thermoplastic elastic material manufacture, support and housing contacts position are near four buckles of position, drain pipe end design, buckle is triangle draw-in groove, be distributed between two the both sides of support, balance for from bonding to thin slice, on shell, design four dead slots corresponding with the buckle of support.The centrage that feed tube and drain pipe form is the centrage of safety device, this centerline is in the plane of the centrage of left side two buckles and the centrage of right side two buckles formation, both sides buckle all so distributes: near the buckle head end of feed tube with the buckle end-to-end distance away from feed tube from being 1 ~ 10mm, one-sided two buckles are centered close on same axis, and above-mentioned axis is parallel with the centrage of safety device.Support has a groove near unidirectional thin slice end and with housing contacts edge, and groove is used for placing sealing ring, and sealing ring is slightly larger than groove, and for guaranteeing the sealing of support and shell, lower cover is communicated with drain pipe.
The present invention compared with prior art, realize visible blood-flow while puncture first, in the time that liquid in conduit flows backwards after blood back first again, safety device can stop needle end conduit inner liquid medicine to flow backwards, thereby prevention backflow of blood, the generation of anti-return blood has alleviated nursing staff's workload simultaneously, easy to operate, time saving and energy saving.
Figure of description
Fig. 1 is the cutaway view of safety device in the present invention, 1-feed tube, 2-upper cover, 3-shell, 4-through hole, 5-sealing ring, 6-support, the unidirectional thin slice of 7-, 8-lower cover, 9-drain pipe, 10-buckle.
Fig. 2 is safety device cutaway view when blood back complete operation first in the present invention.
Fig. 3 is cutaway view when safety device blood return prevention starts in the present invention.
Fig. 4 is structural representation of the present invention, 1-needle stand, 2-syringe needle, 3-safety device, the conduit of 4-connecting needle and needle stand.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 4, intravenous needle is made up of conduit and the safety device of needle stand, syringe needle, connection needle stand and syringe needle.As shown in Figure 1, safety device is by feed tube, upper cover, shell, through hole, sealing ring, support, unidirectional thin slice, lower cover, drain pipe, buckle composition.Upper cover is useful on and sets up the feed tube being connected with conduit outside, lower cover is useful on and sets up the drain pipe being connected with conduit outside, upper cover and shell form an inner chamber, inner chamber is communicated with feed tube, on shell, there is through hole, via design is more than 2 or 2, the gross area of through hole is 1 ~ 10 square millimeter, the preferred area of through hole is 6 square millimeters, such area not only meets traffic requirement but also can effectively stop the secondary blood back after puncturing first successfully, support and through hole have cross hang structure near end, for fixing unidirectional thin slice, unidirectional thin slice adopts medical silica-gel, or medical grade rubber, or medical thermoplastic elastic material manufacture.
Unidirectional thin slice is preferentially selected medical silica-gel, and medical silica-gel is more soft, and toughness is high, and convenient realization effectively blocks through hole, stops the backflow of blood.
Support and housing contacts position are near four buckles of position, drain pipe end design, and buckle is triangle draw-in groove, is distributed between two the both sides of support, and the balance for bonding to thin slice designs four dead slots corresponding with the buckle of support on shell.The centrage that feed tube and drain pipe form is the centrage of safety device, this centerline is in the plane of the centrage of left side two buckles and the centrage of right side two buckles formation, both sides buckle all so distributes: near the buckle head end of feed tube with the buckle end-to-end distance away from feed tube from being 1 ~ 10mm, one-sided two buckles are centered close on same axis, and above-mentioned axis is parallel with the centrage of safety device.Support has a groove near unidirectional thin slice end and with housing contacts edge, and groove is used for placing sealing ring, and sealing ring is slightly larger than groove, and for guaranteeing the sealing of support and shell, lower cover is communicated with drain pipe.
As shown in Figure 2; shell is positioned near on the buckle of feed liquor pipe end; it is the original state of safety device; while puncturing first successfully, the present invention can guarantee have blood normally to reflux in conduit; without any stopping; now medical personnel; and open gradually the actuator of transfusion device; shell is placed on the buckle away from feed liquor pipe end; follow this move unidirectional thin slice apart from through hole during with respect to original state more recently, between unidirectional thin slice and through hole, still there is certain gap, but do not block through hole; medicinal liquid still can enter intravenous needle by through hole, does not affect transfusion speed.Medicinal liquid enters inner chamber by inlet, walks through hole, through the cross hang structure of unidirectional thin slice and support, finally enters human body by liquid outlet.
As shown in Figure 3, input when complete when medicinal liquid, conduit angular vein pressure is greater than liquid gravity pressure, blood enters in conduit in advance, now unidirectional thin slice can cover through hole completely, and examination blood cannot flow backwards, and has stoped medicinal liquid after puncturing first successfully to input the blood backflow situation when complete.After puncturing first successfully, blood backflow the present invention that intravenous needle causes during higher than the pressure of the needle for inserting bottle of transfusion device also can effectively stop, and principle is the same.The present invention has really accomplished the visible blood-flow that punctures first, and the safety intravenous needle of blood return prevention while occurring flowing backwards in some situation first.
Above embodiment is only for the present invention is described, and limitation of the present invention not, the those of ordinary skill in relevant technologies field, without departing from the spirit and scope of the present invention, can also make a variety of changes and modification.Therefore all technical schemes that are equal to also belong to protection category of the present invention.
Claims (10)
1. intravenous needle, is characterized in that intravenous needle is made up of conduit and the safety device of needle stand, syringe needle, connection needle stand and syringe needle, and safety device is by feed tube, upper cover, shell, through hole, sealing ring, support, unidirectional thin slice, lower cover, drain pipe, buckle composition.
2. intravenous needle according to claim 1, is characterized in that upper cover is useful on and sets up the feed tube being connected with conduit outside, and lower cover is useful on and sets up the drain pipe being connected with conduit outside.
3. intravenous needle according to claim 1, is characterized in that upper cover and shell form an inner chamber, and inner chamber is communicated with feed tube, and lower cover is communicated with drain pipe.
4. intravenous needle according to claim 1, is characterized in that it is more than 2 or 2 on shell, having through hole, via design, and the gross area of through hole is 1 ~ 10 square millimeter.
5. intravenous needle according to claim 1, is characterized in that support and through hole have cross hang structure near end, for fixing unidirectional thin slice.
6. intravenous needle according to claim 5, is characterized in that unidirectional thin slice adopts medical silica-gel or medical grade rubber or medical thermoplastic elastic material manufacture.
7. intravenous needle according to claim 1, is characterized in that support has a groove near unidirectional thin slice end and with housing contacts edge, and groove is used for placing sealing ring, and sealing ring is slightly larger than groove, for guaranteeing the sealing of support and shell.
8. according to the intravenous needle described in claim 1.2.3.4.5.7 any one, it is characterized in that support and housing contacts position are near four buckles of position, drain pipe end design, buckle is triangular hill, be distributed between two the both sides of support, balance for from bonding to thin slice, designs four dead slots corresponding with the buckle of support on shell.
9. intravenous needle according to claim 8, is characterized in that the centrage that feed tube and drain pipe form is the centrage of safety device, and this centerline is in the plane of the centrage of left side two buckles and the centrage of right side two buckles formation.
10. intravenous needle according to claim 8, is characterized in that both sides buckle all so distributes:
A1 near the buckle head end of feed tube with away from the buckle end-to-end distance of feed tube from being 1 ~ 10mm;
One-sided two buckles of a2 are centered close on same axis, and above-mentioned axis is parallel with the centrage of safety device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410079981.3A CN103785078B (en) | 2014-03-06 | 2014-03-06 | Intravenous needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410079981.3A CN103785078B (en) | 2014-03-06 | 2014-03-06 | Intravenous needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103785078A true CN103785078A (en) | 2014-05-14 |
| CN103785078B CN103785078B (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410079981.3A Active CN103785078B (en) | 2014-03-06 | 2014-03-06 | Intravenous needle |
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| Country | Link |
|---|---|
| CN (1) | CN103785078B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110731834A (en) * | 2019-10-25 | 2020-01-31 | 郑州美港高科生物科技有限公司 | Iron-base alloy renal artery stent |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2109860U (en) * | 1992-01-30 | 1992-07-15 | 张秀德 | Anti-reblood infusion needle |
| WO2009031018A2 (en) * | 2007-09-05 | 2009-03-12 | Haemotronic Advanced Medical Technologies S.P.A. | Check valve for a medical device |
| CN201643190U (en) * | 2010-05-10 | 2010-11-24 | 覃健凤 | Safety back valve type vein transfusion needle |
| CN201987968U (en) * | 2011-01-29 | 2011-09-28 | 王欣丽 | Blood backflow prevention intravenous syringe needle |
| CN203227108U (en) * | 2013-04-10 | 2013-10-09 | 山东威高集团医用高分子制品股份有限公司 | Vein needle |
| CN203724554U (en) * | 2014-03-06 | 2014-07-23 | 北京伏尔特技术有限公司 | Venous needle |
-
2014
- 2014-03-06 CN CN201410079981.3A patent/CN103785078B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2109860U (en) * | 1992-01-30 | 1992-07-15 | 张秀德 | Anti-reblood infusion needle |
| WO2009031018A2 (en) * | 2007-09-05 | 2009-03-12 | Haemotronic Advanced Medical Technologies S.P.A. | Check valve for a medical device |
| CN201643190U (en) * | 2010-05-10 | 2010-11-24 | 覃健凤 | Safety back valve type vein transfusion needle |
| CN201987968U (en) * | 2011-01-29 | 2011-09-28 | 王欣丽 | Blood backflow prevention intravenous syringe needle |
| CN203227108U (en) * | 2013-04-10 | 2013-10-09 | 山东威高集团医用高分子制品股份有限公司 | Vein needle |
| CN203724554U (en) * | 2014-03-06 | 2014-07-23 | 北京伏尔特技术有限公司 | Venous needle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110731834A (en) * | 2019-10-25 | 2020-01-31 | 郑州美港高科生物科技有限公司 | Iron-base alloy renal artery stent |
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| Publication number | Publication date |
|---|---|
| CN103785078B (en) | 2016-01-20 |
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