CN204766842U - Needleless infusion prevents that needle is kept somewhere to vein against current - Google Patents

Abstract

A needle-free infusion anti-reflux venous indwelling needle, comprising a connection seat, which is a needle-free infusion joint connected to a syringe or an infusion set at one end, and the connection seat connects a catheter to a three-way joint of a winged plug assembly One end is connected, the connecting conduit is equipped with a flow-stop clip, the winged plug assembly is connected to the puncture needle through the indwelling hose, the connecting conduit connected to the three-way joint is bonded to the inner cavity of the PVC tube, and the outer end of the PVC tube is connected to two A valve that can make the connecting catheter open or closed. The valve is made of silicone material. There is a central shaft between the two valves that can make the two valves rotate. The central shaft is fixed on the PVC pipe. The utility model adopts the needle-free infusion joint so that the patient can repeatedly infuse medicines into the infusion line without acupuncture during the infusion process, and at the end of the infusion, a positive pressure can be generated to prevent the blood in the patient from flowing back to the puncture needle or the connecting catheter In order to avoid the risk of clogging the connecting catheter and reduce the chance of infection.

Description

Needle-free infusion anti-reflux intravenous indwelling needle

technical field

The utility model relates to an indwelling needle, in particular to a needleless infusion anti-backflow venous indwelling needle.

Background technique

Currently clinically commonly used puncture tools include scalp steel needles and intravenous indwelling needles. Intravenous indwelling needle is a new nursing operation technology developed rapidly in recent years. It has been widely used in our country. However, with the popularization and application of indwelling needle, some problems in use have become increasingly prominent. The number of blood vessel punctures reduces the pain of the patient, is easy to operate, and is easy to fix. It can effectively meet the clinical rescue needs of infusion and blood transfusion. Reflux, leading to panic and anxiety in patients. Or due to the blood return in the extension tube when the patient is active, the patient is nervous, and at the same time, the blood return may cause the tube to be blocked.

Utility model content

The purpose of the utility model is to provide a needle-free infusion anti-backflow venous indwelling needle, which can prevent blood backflow and avoid blood pollution when the needle core is pulled out during venipuncture or in the process of infusion and retention.

In order to realize the above solution, the technical solution of the utility model is: a needle-free infusion anti-reflux venous indwelling needle, including a connecting seat, the connecting seat is connected to one end of the three-way joint of the winged plug assembly through a connecting catheter, and the A flow-stop clip is installed on the connecting conduit, and the winged plug assembly is connected to the puncture needle through an indwelling hose, wherein the connecting conduit connected to the three-way joint is bonded to the inner cavity of the PVC pipe, and the PVC The outer end of the tube is connected with two flaps that can lead to or close the connecting catheter. The flaps are made of silicone material, and there is a central axis between the two flaps that allows the two flaps to rotate. , the axis is fixed on the PVC pipe.

The utility model relates to a needle-free infusion anti-backflow venous indwelling needle, wherein the two valves are symmetrically arranged and semicircular in shape.

The utility model relates to a needle-free infusion anti-backflow venous indwelling needle, wherein the connecting seat is a Y-shaped catheter connecting seat.

The utility model provides a needle-free transfusion anti-reflux venous indwelling needle, wherein the connecting seat adopts a needle-free infusion connector, and the needle-free infusion connector includes a female connector at one end for connecting with a syringe or an infusion set, and the other end of the female connector is It is plugged with one end of the shell, and the inner cavity of the shell is provided with an annular boss along the circumferential direction away from the female joint. The inner cavity of the female joint is inserted with an elastic plug, and the center of the elastic plug is provided with a through hole. One end of the elastic plug is closely connected with one end of the inner cavity of the female connector, and the other end of the elastic plug passes through the inner cavity of the female connector and then extends into the inner cavity of the shell and abuts against the annular boss. The through hole and the inner cavity of the outer shell In isolation, the diameter of the lumen of the housing is greater than the diameter of the cross section of the elastic plug, and when the elastic plug is pressed and moves toward the housing, the through hole communicates with the lumen of the housing.

In the utility model, the anti-reflux intravenous indwelling needle for needle-free transfusion, wherein the cross-sectional diameter of the inner cavity part of the female connector close to the connection end with the syringe or the infusion set is smaller than the cross-sectional diameter of the other part.

The utility model relates to a needle-free infusion anti-reflux venous indwelling needle, wherein a sealing plug is provided on the end of the elastic plug far away from the shell.

The utility model relates to a needle-free transfusion anti-reflux venous indwelling needle, wherein the elastic plug is made of PC, ABS, PP or medical silicon rubber.

The utility model relates to a needle-free transfusion anti-reflux venous indwelling needle, wherein the front end of the indwelling hose is set as a tapered tube that can be closely matched with the puncture needle.

After adopting the above scheme, the needle-free infusion anti-reflux venous indwelling needle of the utility model is made by bonding the part connected with the three-way joint of the winged stuffy plug assembly to the inner cavity of the PVC tube, and setting two silicone materials at one end of the PVC tube. The silicone valve has the characteristics of plastic recovery. When the liquid flows in, the two valves will be opened due to the pressure, so that the two valves rotate around the central axis and fit together, so that the connecting catheter is completely connected. And because the valve has good resilience, after the liquid is injected, the valve automatically rebounds to seal the inner cavity of the connecting catheter, which can effectively prevent the backflow of blood.

The further beneficial effects of the utility model are: by setting the connection seat as a needle-free infusion joint composed of a female joint, a shell and a blockage connection, the patient can repeatedly infuse blood into the infusion line without needing to be pierced by a puncture needle during the infusion process. Inject the drug and generate positive pressure at the end of the infusion to prevent the blood in the patient from flowing back into the puncture needle or the connecting catheter, avoiding the risk of blocking the connecting catheter and reducing the chance of infection.

Description of drawings

Fig. 1 is a structural schematic diagram of Embodiment 1 of the needle-free infusion anti-reflux venous indwelling needle of the present invention;

Fig. 2 is the schematic diagram of the closed state of the valve at the end of the PVC pipe of the present invention;

Fig. 3 is a schematic diagram of the open state of the valve at the end of the PVC pipe of the present invention;

Fig. 4 is a structural schematic diagram of Embodiment 2 of the needle-free infusion anti-reflux venous indwelling needle of the utility model;

Fig. 5 is a schematic diagram of the structure of the connecting seat in Fig. 4 before use;

FIG. 6 is a schematic structural view of the connecting seat in FIG. 4 after use.

Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described further.

Detailed ways

As shown in Figure 1, the needle-free infusion anti-reflux venous indwelling needle of the present invention includes a connecting seat 1, which adopts a Y-shaped catheter connecting seat, and the connecting seat 1 is connected with a winged block assembly 3 through a connecting catheter 2, with The wing plug assembly 3 is composed of a metal rivet 4, a transparent three-way joint 5 and an overflow-proof plug 6. One end of the three-way joint 5 is connected to the connecting conduit 2, and a flow-stop clip 7 is installed on the connecting conduit 2. The second end of the three-way joint 5 communicates with the indwelling hose 8, the metal rivet 4 is arranged on one end of the inner cavity of the three-way joint 5 and is connected with the indwelling hose 8, and the anti-overflow plug 6 is arranged on the other end of the inner cavity of the three-way joint 5 One end is connected with the indwelling hose 8, the anti-overflow plug 6 is made of rubber material, the other end of the indwelling hose 8 is connected with the puncture needle 9, the anti-overflow plug 6 can effectively seal when the puncture needle 9 is pulled out effect. The front end of the indwelling hose 8 is set as a tapered tube that can closely fit with the puncture needle 9, which can also effectively play a sealing role.

As shown in FIG. 2 , the connection conduit 2 connected to the three-way joint 5 is bonded to the inner cavity of the PVC pipe 10 , and the outer end of the PVC pipe 10 is connected with two valves 11 that allow the connection conduit 2 to conduct or close. , the two flaps 11 are made of silica gel material, and a central axis 18 that can make the two flaps 11 rotate is arranged between the two flaps 11, and the central axis 18 is fixed on the PVC pipe 10. In this embodiment, the PVC pipe 10 , the valve 11 and the central axis 18 are integrally formed by injection molding. This figure is a schematic diagram of the closed state of the valve. Figure 3 is a schematic diagram of the open state of the valve at the end of the PVC pipe.

The needleless transfusion anti-reflux venous indwelling needle of the utility model is bonded to the inner cavity of the PVC pipe 10 by bonding the part connected with the tee joint 5 of the winged stuffy plug assembly 3, and two silica gel materials are arranged at one end of the PVC pipe 10. The finished valve 11, the silicone valve 11 has the characteristics of plastic recovery. When the liquid flows in, the two valves 11 will be opened due to the pressure, so that the two valves 11 rotate around the central axis 18 and fit together. The connecting catheter 2 is fully connected, and because the valve 11 has good resilience, the valve 11 automatically rebounds after the liquid is injected to seal the inner cavity of the connecting catheter 2, which can effectively prevent blood backflow.

As shown in Figure 4, the structure schematic diagram of Embodiment 2 of the needle-free infusion anti-reflux venous indwelling needle of the utility model, most of its structure is the same as that of the embodiment described in Figure 1, the difference is: as shown in Figure 5 and Figure 6 As shown, the connection seat 1' is a needle-free infusion connector, which includes a female connector 12 at the upper end for connecting with a syringe or an infusion set, and the upper cross-sectional diameter of the inner cavity of the female connector 12 is smaller than the lower cross-sectional diameter. The lower end of the female connector 12 is plugged together with the upper end of the hollow housing 13 , and the diameter of the inner chamber cross-section of the housing 13 is equal to the lower cross-sectional diameter of the inner chamber of the female connector 12 . The lower part of the inner cavity of the shell 13 is provided with an annular boss 14 along the circumference, and an elastic plug 15 is inserted in the inner cavity of the female connector 12, and the elastic plug 15 is made of PC, ABS, PP or medical silicone rubber. The center of the elastic plug 15 is provided with a through hole 16 , the upper end of the elastic plug 15 is flush with and tightly connected to the upper end of the inner cavity of the female connector 12 , and a sealing plug 17 is provided on this end of the elastic plug 15 . The lower end of the elastic plug 15 passes through the inner cavity of the female connector 12 and then extends into the inner cavity of the housing 13 and abuts on the annular boss 14. The through hole 16 is isolated from the inner cavity of the outer housing 13, and the diameter of the inner cavity of the outer housing 13 is larger than that of the elastic plug. The cross-sectional diameter of 15, when the elastic plug 15 is pressed down after opening the sealing plug 17, when it completely enters the inner cavity of the outer shell 13, the through hole 16 communicates with the inner cavity of the outer shell 13.

When infusion is needed, a syringe or an infusion set is inserted into the upper end of the inner cavity of the female connector 12, at this time the elastic plug 15 is pushed downward, the sealing plug 17 on the elastic plug 15 is opened, and when the elastic plug 15 is fully pushed into the shell 13 When the inner cavity of the inner cavity is connected, the through hole 16 of the elastic plug 15 communicates with the inner cavity of the shell 13, so that the liquid in the syringe or infusion set communicates with the inner cavity of the outer shell 13. When the infusion is completed and the syringe or infusion set is pulled out, the elastic plug 15 is restored to deformation, and the elastic plug 15 and the shell 13 are sealed again, so that a safe needle-free connection that can be plugged repeatedly is realized. At the same time, when the syringe or infusion set is pulled out after use, a positive pressure is generated in the female connector 12 , forcing the liquid to quickly flush into the vein, so that the venous blood leaves the puncture needle 9, thereby avoiding blood coagulation in the needle tube, preventing the blood in the patient from flowing back into the needle of the puncture needle 9 or the connecting catheter 2, and avoiding the risk of blocking the connecting catheter 2, Reduce the chance of infection, keep the indwelling needle unblocked, and the positive pressure valve adopts a closed channel for infusion, and the liquid channel is completely closed and hidden by the elastic plug 15, which ensures the airtight and sterile state of the liquid channel in the inner cavity of the female connector 12, reducing microorganisms Ingress and air inhalation potential hazard.

The above-mentioned embodiment is only to describe the preferred implementation mode of the utility model, and is not to limit the scope of the utility model. Various modifications and improvements made should fall within the scope of protection determined by the claims of the present utility model.

Claims (8)

1. a no-needle transfusion Anti-reflux venous indwelling needle, comprise Connection Block, described Connection Block is connected by connecting duct three way cock one end with the vexed plug assembly of the band wing, described connecting duct is provided with flow-stopping clip, the vexed plug assembly of the described band wing is connected with puncture needle by indwelling flexible pipe, it is characterized in that: the connecting duct position be connected with described three way cock is bonded in the inner chamber of pvc pipe, the outboard end of described pvc pipe is connected with two can make connecting duct conducting or closed flap valve, described flap valve is made up of silica gel material, the axis that two flap valves can be made to rotate is provided with between two described flap valves, described axis is fixed on pvc pipe.

2. no-needle transfusion Anti-reflux venous indwelling needle according to claim 1, is characterized in that: two described flap valves are symmetrical arranged and semicircular in shape.

3. no-needle transfusion Anti-reflux venous indwelling needle according to claim 2, is characterized in that: described Connection Block is Y type tubes connection seat.

4. no-needle transfusion Anti-reflux venous indwelling needle according to claim 1, it is characterized in that: described Connection Block adopts no-needle transfusion joint, described no-needle transfusion joint comprises the negative joint of one end for being connected with syringe or transfusion device, the other end of described negative joint and one end grafting of shell, the inner chamber of described shell is circumferentially provided with annular boss away from the position of negative joint, the inner chamber of described negative joint is plugged with elasticity blocking, the center of described elasticity blocking is provided with through hole, described one end of elasticity blocking and inner chamber one end compact siro spinning technology of negative joint, the other end of described elasticity blocking is through stretching into shell inner cavity after negative joint inner chamber and being against on annular boss, described through hole and shell inner cavity are isolated, the intracavity diameter of described shell is greater than the cross-sectional diameter of elasticity blocking, when elasticity blocking is pushed to after shell direction moves, described through hole communicates with shell inner cavity.

5. no-needle transfusion Anti-reflux venous indwelling needle according to claim 4, is characterized in that: the inner chamber part cross-sectional diameter near the described negative joint with syringe or transfusion device link is less than the cross-sectional diameter of its another part.

6. the no-needle transfusion Anti-reflux venous indwelling needle according to claim 4 or 5, is characterized in that: the described elasticity away from described shell blocks one end and is provided with sealing-plug.

7. no-needle transfusion Anti-reflux venous indwelling needle according to claim 6, is characterized in that: described elasticity blocking is made up of PC or ABS or PP or medical grade silicon rubber.

8. no-needle transfusion Anti-reflux venous indwelling needle according to claim 1, is characterized in that: the front end of described indwelling flexible pipe is set to can conical pipe close-fitting with described puncture needle.