CN203724554U

CN203724554U - Venous needle

Info

Publication number: CN203724554U
Application number: CN201420099838.6U
Authority: CN
Inventors: 陈曦阳; 李银华; 杨森林
Original assignee: BEIJING FERT TECHNOLOGY Co Ltd
Current assignee: BEIJING FERT TECHNOLOGY Co Ltd
Priority date: 2014-03-06
Filing date: 2014-03-06
Publication date: 2014-07-23
Anticipated expiration: 2024-03-06

Abstract

The utility model belongs to the field of medical apparatus, and particularly relates to a venous needle of an infusion apparatus. With the safe venous needle, blood-returning can be achieved at the first puncture but can be avoided when liquid flows back in some cases after the first blood-returning. The technical scheme includes that the venous needle consists of a needle seat, a needle head, a catheter connecting the needle seat and the needle head and a safety device; the safety device consists of a liquid inlet pipe, an upper cover, a shell, a through hole, a seal ring, a support, a one-way thin piece, a lower cover, a liquid outlet pipe and a fastener. The venous needle has the advantages that blood returns at the first puncture, the safety device can prevent liquid medicine in the catheter at the needle head end against returning when solution flows back again after the first blood-returning, so that blood-returning is prevented, introduction of air into the venous is avoided, workload of nurse is reduced, operation is facilitated, and time and effort are saved.

Description

Intravenous needle

Technical field

This utility model belongs to medical instruments field, particularly transfusion device intravenous needle.

Background technology

At present, the intravenous needle of common disposable transfusion device is comprised of the conduit of needle stand, syringe needle and connection needle stand and syringe needle.Before transfusion, medical personnel understand the air in 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 sign 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, when 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.

Utility model content

The purpose of this utility model is to provide a kind of visible blood-flow that punctures first, and the safety intravenous needle of blood return prevention while occurring flowing backwards in some situation first.

This utility model is to adopt following technical proposals to realize: intravenous needle is comprised 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, and shell, through hole, sealing ring, support, unidirectional thin slice, lower cover, drain pipe, buckle forms.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.

This utility model compared with prior art, realized visible blood-flow while puncturing first, when 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 this utility model, 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 during blood back complete operation first in this utility model.

Fig. 3 is cutaway view when safety device blood return prevention starts in this utility model.

Fig. 4 is structural representation of the present utility model, 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 utility model is further described.Following examples are used for illustrating this utility model, but are not used for limiting scope of the present utility model.

As shown in Figure 4, intravenous needle is comprised 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, and shell, through hole, sealing ring, support, unidirectional thin slice, lower cover, drain pipe, buckle forms.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, this utility model can guarantee have blood normally to reflux in conduit; without any stopping; medical personnel now; 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, and the cross hang structure through unidirectional thin slice and support, finally enters human body by liquid outlet.

As shown in Figure 3, when medicinal liquid, input when complete, 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 blood backflow situation when complete.After puncturing first successfully, blood backflow this utility model 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.This utility model has really been 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 this utility model is described, and is not limitation of the utility model, and the those of ordinary skill in relevant technologies field, in the situation that not departing from spirit and scope of the present utility model, 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 utility model.

Claims

1. intravenous needle, is characterized in that intravenous needle is comprised 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, and shell, through hole, sealing ring, support, unidirectional thin slice, lower cover, drain pipe, buckle forms.

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 the buckle end-to-end distance away from 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.