CN204840496U - Keep somewhere needle with malleation device - Google Patents

Abstract

The utility model relates to the technical field of infusion equipment, in particular to an indwelling needle with a positive pressure device. The positive pressure device is provided on an extended hose. The positive pressure device includes a base and a roller, and an infusion tank is arranged between the base and the roller. There are guide rails on both sides inside the base, and at least three pairs of anti-retraction ribs are arranged on the guide rails on both sides. The anti-retraction ribs of the rollers are respectively located near the inlet end of the infusion tank, near the outlet end of the infusion tank and in the middle of the guide rails. During the use of the utility model, after the infusion is completed, the liquid in the extended hose flows to the front end of the catheter by squeezing and pushing the positive pressure device, so that the liquid at the front end of the catheter flows out, so as to avoid the formation of blood remaining in the catheter during the next infusion. Embolism, good tube sealing effect, convenient operation, effectively prolonging the indwelling time. During the indwelling period, it was found that the blood osmosis can provide positive pressure again and reduce the occurrence of tube blockage; Helpful in judging pipe blockage.

Description

A kind of indwelling needle with positive pressure device

[technical field]

The utility model relates to the technical field of infusion equipment, in particular to an indwelling needle with a positive pressure device.

[Background technique]

Existing intravenous infusion needles are easy to puncture blood vessels during infusion, and must be replaced every time. The utility model and application of the venous indwelling needle overcome these shortcomings. After the venipuncture is completed, the needle core needs to be pulled out, leaving only the cannula, so the blood vessel will not be damaged, and it can be used continuously for several days in the blood vessel. At the same time, the use of venous indwelling needles can also reduce the pain caused by repeated venipuncture of patients, reduce the workload of nurses, and facilitate clinical medication. Therefore, venous indwelling needles are widely used clinically.

Existing venous indwelling needles are all covered with flow-stop clips on their extension tubes. During normal infusion, the stop clip is in the open state, and the infusion is performed through the infusion set with the heparin cap or end cap; when the infusion needs to be suspended, an external force is applied to close the stop clip, and the boss inside the stop clip will extend the tube clip Tighten and keep the extension tube disconnected. This method of suspending the infusion is a fast and direct clamping method. Usually, the stop clamp is made of semi-rigid plastic material. When directly clamping, due to the elastic effect of the plastic, a negative pressure is generated in the catheter at the position in contact with the patient. , resulting in blood return from the indwelling catheter, which is known to be the direct cause of coagulation, thrombus formation, or blockage in the indwelling catheter, which is hidden at the end of the indwelling catheter, hidden in our opaque blood vessels , the naked eye cannot directly observe and is relatively concealed, which will affect the subsequent infusion. Even if it is pressurized and flushed, the thrombus may block the capillaries, and even cause vasculitis, resulting in unnecessary medical accidents.

In order to avoid blood backflow into the needle and cause tube blockage, a slow injection positive pressure tube sealing method or a positive pressure flow stop device is used to positively seal the tube, but the existing positive pressure flow stop device has a complex structure and is expensive. Even if the positive pressure flow stop device on the market is used, it can only avoid the blood return problem when the infusion is completed, and the blood will still seep back into the indwelling catheter during the 18 to 20 hour interval between the infusions.

[utility model content]

The purpose of this utility model is to solve the above-mentioned problems in the prior art, provide a novel structure, simple operation, and solve the problem of blood return during indwelling at the same time, which not only has positive pressure performance, but also can avoid blood coagulation caused by blood return during indwelling, The indwelling needle with a positive pressure device that is blocked to shorten the indwelling time includes an infusion connector. The infusion connector is connected to the catheter seat through an extension hose. A positive pressure device is provided on the extension hose. There is an infusion tank between them, guide rails are provided on both sides of the base, and at least three pairs of anti-retraction ribs are arranged on the guide rails on both sides. In the middle of the guide rail, one or more pairs of anti-retraction ribs near the inlet end can be used to prevent the roller from exiting the base; one or more pairs of anti-retraction ribs in the middle of the guide rail can be used to position the roller for the first time after the infusion is completed and prevent the roller from retreating to avoid Generate blood return; one or more pairs of anti-retraction ribs located near the outlet end can be used for second positioning during the indwelling process and prevent the roller from retreating to avoid blood return.

The cross-sectional area of the inlet end of the infusion tank is greater than the cross-sectional area of the outlet end of the infusion tank.

The guide rail and the extension hose are arranged parallel to each other.

The cross-sectional width of the inlet end of the infusion tank is greater than the cross-sectional width of the inner cavity of the extension hose.

There is an arc-shaped structure at the bottom of the base, which fits the shape of human fingers, and is convenient for clamping the base when pushing the roller forward and back.

One end of the extension hose is connected to the infusion connector and the heparin cap, and the other end of the extension hose is connected to the puncture part. The puncture part includes a catheter base, a puncture needle base and a sheath. There is an isolation room in the catheter base, and the isolation room is connected to the puncture needle through an indwelling catheter. The sheath is arranged on the outside of the puncture needle and the indwelling catheter, and one end is fixed on the catheter seat.

There are positioning ribs on the bottom of the guide rail and the infusion tank. When the axis of the roller passes over the anti-retraction rib, the positioning rib can prevent the roller from moving forward more and avoid blood return.

Compared with the prior art, the utility model has the advantage that in the use process of the utility model, after the infusion is completed, the liquid in the extended hose flows to the front end of the catheter by squeezing and pushing the positive pressure device, so that the front end of the catheter has The liquid flows out to avoid the blood remaining in the catheter to form an embolism during the next infusion. The sealing effect is good, the operation is convenient, and the indwelling time is effectively prolonged. During the indwelling period, it is found that the blood osmosis can provide positive pressure again and reduce the occurrence of catheter blockage ;In addition, when the infusion is repeated, pushing back the roller will form a return of blood, which is beneficial to judge the situation of the blocked tube.

[Description of drawings]

Fig. 1 is the structural representation of the utility model device;

Fig. 2 is the specific structural representation of positive pressure device in the utility model device;

Fig. 3 is the top view of the roller of the positive pressure device in the utility model device;

Fig. 4 is a schematic diagram of the state when the positive pressure device of the present invention is opened;

Fig. 5 is a schematic diagram of the state of the positive pressure device of the present invention during the first positive pressure;

Fig. 6 is a schematic diagram of the state of the positive pressure device of the present invention during the second positive pressure;

In the figure: 1. Sheath 2. Indwelling catheter 3. Extension hose 4. Catheter seat 5. Isolation plug 6. Puncture needle 7. Puncture needle seat 8. Positive pressure device 9. Heparin cap 10. Antibacterial cap 11. Infusion Joint 12. Back rib 13. Roller 14. Positioning rib;

Designate Fig. 1 as the abstract accompanying drawing of the utility model.

[Detailed ways]

Below in conjunction with accompanying drawing, the utility model is further described, and the structure and principle of this device are very clear to those skilled in the art. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The utility model relates to an indwelling needle used for transfusion with a venous indwelling needle, which solves the problem of negative pressure at the moment of separation between the indwelling catheter and the infusion apparatus, resulting in blood return and blood back seepage during the indwelling process.

As shown in Figure 1, the utility model includes an infusion joint, an extension hose, a puncture needle, a puncture needle seat and a catheter assembly. It includes a base and rollers, an infusion tank is arranged between the base and the rollers, an extension hose passes through the infusion tank, guide rails are arranged on both sides inside the base of the positive pressure device, and the guide rails are placed parallel to the extension hose. There are at least three pairs of roller anti-retraction ribs on the guide rails on both sides. The cross section of the inlet end of the infusion tank is larger than the cross section of the outlet end of the infusion tank, and the width of the cross section of the inlet end of the infusion tank is larger than that of the middle part of the cavity.

A pair of anti-retraction ribs is close to the inlet end, used to prevent the rollers from exiting the base; a pair is located in the middle of the guide rail, used for positioning the rollers for the first time after the infusion is completed and prevents the rollers from retreating to avoid blood return; a pair is located near the outlet end, for use During the indwelling process, it is positioned for the second time and prevents the roller from retreating to avoid bleeding.

The bottom of the base is equipped with an arc-shaped structure that fits the shape of human fingers, which is convenient for clamping the base when pushing the roller forward and back, and is convenient for operation. The schematic diagram of the positive pressure device in the initial and open state is shown in Figure 4. By moving the roller, the positive pressure device can exert force on the extension hose. After the infusion is completed, squeeze and push the positive pressure device to make the extension hose The liquid flows to the front end of the catheter, so that the liquid flows out from the front end of the catheter, so as to prevent the blood from remaining in the catheter and forming an embolism during the next infusion, as shown in Figures 5 to 6.

Claims (5)

1. one kind has the remaining needle of positive pressure devices, comprise infusion connector, described infusion connector is by extending hose connection catheter block, it is characterized in that described prolongation flexible pipe is provided with positive pressure devices, positive pressure devices comprises base and roller, transfusion groove is provided with between described base and roller, guide rail is provided with in the both sides, inside of base, two side rails are provided with at least three pair roller retaining muscle, described roller retaining muscle lays respectively near transfusion groove entrance point place, in the middle part of transfusion groove port of export place and guide rail, the entrance point cross-sectional area of transfusion groove is greater than the port of export cross-sectional area of transfusion groove.

2. a kind of remaining needle with positive pressure devices as claimed in claim 1, is characterized in that described guide rail and extends flexible pipe and be arranged in parallel each other.

3. a kind of remaining needle with positive pressure devices as claimed in claim 1, is characterized in that the cross-sectional width of described transfusion groove entrance point is greater than the internal cavity cross-sectional width extending flexible pipe.

4. a kind of remaining needle with positive pressure devices as claimed in claim 1, is characterized in that described base bottom is provided with arcuate structure.

5. a kind of remaining needle with positive pressure devices as claimed in claim 1, it is characterized in that described prolongation flexible pipe one end connects infusion connector and calparine cap, extend the flexible pipe other end and connect piercing portions, piercing portions comprises catheter block, Paracentesis needle holder and sheath, isolation room is provided with in described catheter block, isolation room is by inlying catheter connecting puncture needle, and sheath is set in puncture needle and the outside also one end of inlying catheter is fixed on catheter block.