JPH0317875Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a safety device for intravenous injection.

(Prior Art) As is well known, when using a drip injection device, a nurse manually stops the drip immediately after the drip injection is finished. If the intravenous drip is not stopped as soon as it is finished, air may enter the patient's body or blood may flow backwards. However, since each intravenous drip injection takes 1 to 4 hours, nurses must always be aware of when the injections will be completed. In particular, injecting intravenous fluids at night poses a problem for nurses, and patients are unable to sleep or rest in peace for the injections.

Therefore, a safety control device for intravenous injection has been proposed in the past, and its configuration includes, for example, a liquid bottle, a drip tube, and an inflow rate regulator. It has an inlet and an air vent, an outlet is formed at the bottom, a float is installed in the main body chamber, a valve body is protruded from the lower surface of the float, and a valve seat with the outlet is connected to the main body. A device equipped with an on-off valve is known (Japanese Patent Application Laid-Open No. 1973-
Publication No. 38493).

(Problems to be solved by the invention) However, with the above-mentioned drip device, it is difficult to continuously inject by replacing the bottle with a new one, and even in that case, it is difficult to vent the air so that the remaining injection solution can flow smoothly. The air vent structure is complicated because it is necessary for the liquid bottle and the inflow rate regulator.

Therefore, the purpose of this invention is to provide a safety device that can automatically stop the flow of the injection solution when the intravenous injection is completed, and can be used continuously by replacing the bottle with a new one, without wasting the injection solution in this case. It's about doing.

(Means for Solving the Problems) The features of the present invention are that a float 2 is inserted into the drip tube 1, a valve body 20 is provided at the bottom of the float, and a soft tube 3 is provided at the top of the drip tube. A retaining ring 9 is provided at the bottom of the soft cylinder, and a socket 5 is provided at the upper end of the soft cylinder with a needle 4 installed therein.
An elastic ring 6 is provided at the bottom of the drip tube, and this elastic ring has a circular hole 60 that fits into the valve body, and an adjustment pipe 7 is provided inside the outlet of the drip tube so that it can move up and down. The adjusting pipe is arranged so that it can be moved up and down through the circular hole of the elastic ring, so that the valve body of the float can be disengaged from the circular hole.

(Function) Therefore, as the intravenous injection progresses and the injection solution in the intravenous tube 1 gradually decreases, the float 2
The float sinks downward, and when the injection solution remains only at the bottom of the drip barrel 1, the float 2 descends under its own weight, and the valve body 20 of this float is forced into the circular hole 60 of the elastic ring 6. Fits in. Therefore, the injection needle C is passed from the drip tube 1 through the adjustment pipe 7.
The passageway for the injection solution leading to the injection solution is closed and the flow of the injection solution stops, resulting in a non-flowing state.

Since the valve body 20 of the float 2 is fitted into the circular hole of the elastic ring 6, this fitting has good tightness and ensures that the injection solution is prevented from flowing out. Drip injection can be started by reducing the pressure inside the drip tube 1 using the soft tube 3 and moving the adjustment pipe 7 up and down. The retaining ring 9 prevents the fluid funnel 2 from rising into the soft tube 3 when the drip tube 1 is filled with injection liquid.

(Example) Examples of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, a float funnel 2 is inserted into a transparent drip tube 1, and this float floats up and down inside the drip tube. A soft tube 3 made of plastic is connected above the drip tube 1, and a socket 5 with a needle 4 attached thereto is connected above the drip tube. It can be inserted into liquid bottle A. The inside of the socket 5 to which the needle 4 is attached is hollow, and one injection liquid inlet 40, 40 is opened on each side of the tip of the needle.

An elastic ring 6 made of rubber and open at the lower end is inserted into the bottom of the drip barrel 1, and a circular hole 60 is formed in the center of the upper surface of the elastic ring.
Further, a conical valve body 20 is vertically provided on the lower surface of the float 2, and this valve body is designed to fit into a circular hole 60. The connection or withdrawal functions to open and close the passage and blocking of the injection solution.

In addition, the lower end opening of the drip barrel 1 is an outlet pipe 1 for injection liquid.
0 is provided, and one adjustment pipe 7 is inserted into the inner wall of this exit pipe, and this adjustment pipe extends below this exit pipe, and this adjustment pipe can be moved up and down by grasping with fingers. It is possible to do so.

Further, the adjustment pipe 7 can pass through the circular hole 60 of the upper elastic ring 6 and push up the float 2 as shown in FIG. The body 20 can be moved away from the circular hole of this elastic ring. Conversely, when the adjustment pipe 7 is pulled down to its original position, the valve body 20 of the float 2 fits into the circular hole 60 of the elastic ring 6 due to its own weight. When the valve body is closed, the outflow of the injection solution is more reliably stopped. Furthermore, a rubber tube 8 is press-fitted and connected to the outer periphery of the outlet tube 10 of the drip barrel 1 to prevent leakage of the injection solution. Furthermore, the rubber tube 8 has a stepped outer shape with a large diameter section 81 that fits into the outlet tube 10 at the top and a small diameter section 82 at the bottom. The portion 82 enters into the gap between the inner surface of the large diameter portion 81 and the adjustment pipe 7, and conversely, the adjustment pipe 7
When the rubber tube 8 is pulled down, the small diameter portion 82 of the rubber tube 8 also goes down and returns to its original position.

Also, between the soft tube 3 and the drip tube 1, there is a retaining ring 9.
A through hole 90 is provided in the center of the retaining ring. The retaining ring 9 is attached to the drip tube 1
When the inside is filled with injection liquid, the float 2 moves to the soft cylinder 3.
to prevent it from rising into the
If the float 2 were to enter the soft cylinder 3, it would become an obstacle to the operation of denting the soft cylinder with one's fingers, as will be explained later.

In addition, in order to ensure that the valve body 20 of the float 2 fits into the circular hole 60 of the elastic ring 6,
If square flanges 21 and 22 are provided at both the upper and lower ends of the float 2 as shown in FIGS. 1 and 4, they will maintain an appropriate contact surface with the inner surface of the drip tube 1 and smoothly float up and down. It is effective in making people

Next, the operation of the present invention will be explained.

As shown in FIG. 2, when starting an intravenous drip injection, first insert the needle 4 into the bottle A, and at first the pressure in the bottle is equal to the pressure inside the soft tube 3 and the drip tube 1. Due to its own weight, the float 2 has its valve body 20 fitted into the circular hole 60 of the elastic ring 6 to maintain a state in which the flow of the injection solution is blocked.

In this way, when the pressure in the bottle A and the pressure in the control device according to the present invention are the same, the injection solution is not dripped into the drip barrel 1 due to the principle of pressure equilibrium.

If the nurse holds the soft tube 3 between her fingers and presses and releases it several times, the contraction of the soft tube will reduce the pressure inside the drip tube 1, and the injection solution will be dripped into the drip tube 1. start. When the height of the injection solution accumulated in the drip tube 1 reaches the height of the float 2, the finger is released from the soft tube 3.

Next, in order to send the injection solution accumulated in the drip tube 1 toward the injection solution transport pipe P, the valve body 20 of the float 2 is
It is necessary to remove it from the circular hole 60 of the elastic ring 6. Then push up the adjustment pipe 7 with your fingers,
When the float 2 is pushed upward through the circular hole 60, the valve body 20 of the float is inserted into the circular hole 6.
0 will be unmated. Note that if the shape of the inlet 70 at the upper end of this adjustment pipe 7 is formed into a tupular shape as shown in the first figure, it will be easy to fit with the valve body 20 of the float 2 and the push-up operation will be facilitated. can.

When the float 2 moves upward by the pushing up action of the adjustment pipe 7 and floats in the injection liquid, the adjustment pipe 7 is pulled down and returned to its original position. This is the state shown in FIG. At this point, the inside of the dropper tube 1 is filled with the injection solution, the float 2 floats up due to the buoyancy of the injection solution, and the valve body 20 is separated from the circular hole 60.
The drip barrel 1 is in communication with the bottle A. Thereafter, as shown in Figure 6, the nurse only has to adjust the speed regulator B in the injection solution transport pipe P to adjust the amount of injection solution entering the patient's body.

In this way, the flow of the injection solution during drip injection is
As shown in the figure, the injection solution passes through the inlets 40, 40 of the needle 4, drips into the soft tube 3, and then falls into the drip tube 1. The injection solution in the drip barrel 1 passes through the circular hole 60 of the elastic ring 6, passes through the trumpet-shaped entrance 70 of the adjustment pipe 7, passes through this adjustment pipe, and enters the injection solution transport pipe P as shown in the sixth figure. After flowing into the patient's body, it is sent from the injection needle C into the patient's body.

When the drip injection is about to end, the injection liquid in the drip barrel 1 is descending as shown in Figure 5, so
The float 2 also sinks together, and the valve body 20 of this float fits into the circular hole 60 of the elastic ring 6, blocking the flow of the injection solution. At this time, since the injection liquid still remains between the lower part of the elastic ring 6 and the injection needle C, no matter what time the injection needle is removed, it will not have any effect on the patient. In other words, not only does air flow into the body,
The phenomenon of blood reflux will never occur.

It is also possible to continuously inject by replacing the bottle A with a new one, adjusting the pipe 7 with your finger as shown by the solid line in Figure 5.
If the valve body 20 is pushed upward and separated from the circular hole 60, the liquid remaining in the injection liquid transport pipe P will also flow into the body, so there will be no wastage of injection liquid.

(Effects of the invention) Since the present invention has the above-described configuration, when the intravenous injection is about to end, the infusion is automatically stopped leaving a certain amount of the injection liquid in the intravenous tube. However, there is no inflow of air or backflow of blood into the patient's body, and continuous intravenous injection is possible.
Furthermore, since the injection liquid still remains between the lower part of the elastic ring and the injection needle, there is no effect on the patient even if the injection needle is removed at any time, and continuous injections can be performed by replacing the bottle with a new one. This is possible, and in this case, if the adjusting pipe is pushed upward to separate the valve body from the circular hole, the liquid remaining in the injection liquid transport pipe will also flow into the body, so there will be no wastage of injection liquid. The circular hole of the elastic band and the valve body of the float have good adhesion and ensure that the injection solution stops flowing out. The retaining ring has excellent effects such as preventing the float from rising into the soft tube when the drip tube is filled with injection liquid.

[Brief explanation of drawings]

Fig. 1 is a developed view, Fig. 2 is a slope view, Fig. 3 is a sectional view, Fig. 4 is a sectional view taken along the line A-A in Fig. 3, Fig. 5 is a sectional view showing the completed state of drip injection, and Fig. 6 is a sectional view. The figure is a front view showing the entire state of use including the safety device of the present invention. 1...Drip tube, 2...Float, 20...Valve body, 3...Soft tube, 4...Needle, 5...Socket, 6
... Elastic ring, 60 ... Circular hole, 7 ... Adjustment pipe, 70 ... Upper inlet of adjustment pipe, 9 ... Stop ring.

Claims (1)

[Claims for Utility Model Registration] 1. A drip tube 1, a float 2 inserted in the drip tube, a soft tube 3 connected to the top of the drip tube, and a fluid tube 3 communicating with the upper end of the soft tube. The float is made up of a socket 5, an elastic ring 6 located at the bottom of the drip tube, and an adjustment pipe 7 inserted inside the outlet at the bottom of the drip tube. has a valve body 20 at its bottom, the soft cylinder has a retaining ring 9 at its bottom, the socket has a needle 4 at its upper part, and the elastic ring has an upper part fitted with the valve body. The adjusting pipe has a circular hole 60 that is arranged in the circular hole 60, and the adjusting pipe is capable of moving up and down through the circular hole in order to unfit the valve body of the float and the circular hole of the elastic ring. Safety device for intravenous injection. 2 Utility Model Registration The safety control device for intravenous injection according to claim 1, characterized in that flanges 21 and 22 are provided on at least one of the upper and lower parts of the float 2. 3. The safety control device for intravenous injection according to claim 1, characterized in that the upper inlet 70 of the adjustment pipe is shaped like a flap.