JPH0749053B2 - Submerged liquid drop detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion drip detection device for an infusion drip device.

[0002]

2. Description of the Related Art The infusion rate for injecting blood, nutrient solution, or Ringer's solution, which is generally called infusion, into the human body is not constant, and the type of surgery or the state of each illness of the patient, i.e., severity, pulse rate. Considering the number, blood pressure, heart condition, etc., for example, the time for injecting one 500 ml vial bottle is determined within 1 to 3 hours, but sometimes it takes 4 to 5 hours.

FIG. 3 shows an example of a conventionally used infusion drip device. In FIG. 3, a tube needle 14 is pierced into the cork stopper 12 of the vial bottle 10 which is hung upside down on a stand (not shown). A drip tube 18 is connected to the tube needle 14, and the infusion solution guided by the tube needle 14 drops into the drip tube 18 as a droplet. The infusion solution dropped into the drip tube 18 is temporarily stored in the drip tube 18 and the mixed bubbles are separated.

The infusion solution flowing down the drip tube 18 is guided to the vein needle 32 by the vinyl pipe 20, and the flow rate is adjusted by the roller clamp 26 attached to the vinyl pipe 20 on the way. By adjusting the flow rate by the roller clamp 26, the amount of the infusion solution dropped into the infusion tube 18 is determined, and the infusion rate of the infusion solution injected from the venous needle 32 into the human body is controlled.

[0005]

However, in the conventional infusion drip device, the flow rate of the infused liquid is adjusted by narrowing the vinyl pipe 20 by the roller clamp 26 attached to the vinyl pipe 20. It relied heavily on cans, and the adjusted infusion volume was also very inaccurate.

Therefore, a method of catching the liquid drop of the infusion solution dropped in the drip tube by using a photoelectric tube and controlling the drip rate has been proposed, but in the method using this photoelectric tube,
It is inconvenient because it is easily affected by lighting of a fluorescent lamp or a shadow on the drip tube due to some rhythm, and a slight adjustment is required depending on the type of infusion solution. Further, it has to be installed at right angles to the direction of infusion of the infusion solution, and it takes time to set and adjust the photoelectric tube, and it is poor in versatility and can be applied only to a drip tube having a specific shape.

The present invention provides a conventional infusion device for infusion,
It was made to solve the above-mentioned problem that infusion drip cannot be easily detected, and it can be applied to any drip device very easily, without being affected by noise due to changes in the surrounding environment, and reliably. Another object of the present invention is to provide an under-transfusion-droplet detection device capable of detecting the infusion drop.

[0008]

In view of the above-mentioned drawbacks, the inventor's method of detecting drip of an infusion solution by a photoelectric tube has the drawbacks of the impact sound when the infusion solution is dropped and the pressure of the infusion solution in the drip tube. We have made repeated studies to detect the drop of the infusion solution due to changes or vibration transmitted to the drip tube or the infusion solution supply pipe.

However, when an impact sound is generated, noise is often picked up by ambient noise, so an error may occur, which cannot be adopted. In the case of a pressure change,
The device for pressure detection became large-scale and the pressure detection itself was very difficult and could not be adopted.

Therefore, further research was conducted on the detection of the infusion of the infusion solution in the drip tube by vibration. As a result, they have completed the present invention by finding that when vibration is detected through an airbag, it is possible to detect drop of infusion solution extremely accurately and easily.

The under-liquid-droplet detection device of the present invention comprises a clip that holds the infusion solution supply pipe, and an air bag attached to the holding surface side of the clip and closely attached to the infusion solution supply pipe.
The gist of the present invention is that it comprises a vibration detection sensor attached to the airbag.

[0012]

This device can be attached to any position of the infusion solution supply pipe by the clip that holds the infusion solution supply pipe. On the holding surface of the infusion solution supply pipe of this clip,
Since the air bag is attached, the air bag is pressed against the infusion solution supply pipe and comes into close contact therewith. Therefore, the vibration transmitted to the infusion solution in the infusion solution supply pipe due to the dripping of the infusion solution in the drip tube can be reliably captured as the vibration of the airbag. In addition, even if the diameter of the infusion solution supply pipe changes slightly,
Since the bag is deformed according to the diameter of the vipe, the present invention
The device is an infusion supply part with a diameter within a certain range (for example, 3 to 6 mm).
Ip can be accommodated.

Since the vibration detection sensor is attached to the airbag, the vibration of the airbag is detected by the vibration detection sensor. As described above, in the device of the present invention, the drop of the infusion solution in the drip tube is detected by the vibration, so that the device can be set very easily, and there is no room for noise from the surroundings to be reliably detected. In addition,
As the vibration detection sensor, for example, a low frequency microphone that senses a low frequency of 20 to 70 Hz can be used. Further, the impact from the airbag may be detected using a pressure sensor. Further, the mounting position of this device is not particularly limited as long as vibration of the infusion solution can be detected, and in some cases, it may be directly mounted on the drip tube.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view of an embodiment of the present invention. Clamping pieces 22a and 22 forming a clip
b is urged by springs (not shown) toward opposite sides. An air bag 24 made of an elastic material is attached to the holding surface side of the holding piece 22a, while a cushion 28 made of an elastic material is attached to the holding surface side of the holding piece 22b. The infusion solution supply pipe 20 is sandwiched.

A low frequency microphone 34 is attached to the back surface of the airbag 24, and is connected to a flow rate controller via an amplifier (not shown).

FIG. 2 shows an example in which the device of this embodiment is attached to an infusion drip device. A tube needle 14 is pierced into the cork stopper 12 of the vial bottle 10 which is hung upside down on a stand (not shown). A drip tube 18 is connected to the tube needle 14, and the infusion solution guided by the tube needle 14 drops into the drip tube 18 as a droplet.

A vinyl pipe 20, which is an infusion solution supply pipe, is connected to the drip tube 18, and the infusion solution flowing down through the drip tube 18 is guided to the venous needle by the vinyl pipe 20. A low-frequency microphone 34 that senses vibrations when the infusion solution of the device of this embodiment is dropped into the drip tube 18 is attached, and the vinyl pipe 20 is further constricted downstream thereof to reduce the cross section thereof. An infusion solution supply pipe constriction device 36 for increasing or decreasing the amount of infusion solution flowing down is attached. The narrowing device 36 is composed of a narrowed portion that narrows the pipe and a stepping motor that drives the narrowed portion.

The flow controller 38 is composed of an electronic control circuit, and the vibration sensed by the microphone 34 is input through a known amplifier and frequency discriminator. Further, the time is constantly input to the flow rate controller 38 from the clock 40. The flow rate controller 38 also sends an electric signal to the stenosis device 36 via the signal line 42 to rotate the stepping motor of the stenosis device 36, thereby controlling the amount of the infusion solution dropped.

[0019]

As described above, the apparatus for detecting a submerged liquid drop according to the present invention includes a clip for holding an infusion liquid supply pipe, and an air bag attached to the holding surface side of the clip and closely attached to the infusion liquid supply pipe. A vibration detection sensor attached to the airbag, wherein the device can be attached to an arbitrary position of the infusion solution supply pipe by a clip that holds the infusion solution supply pipe. Since the airbag attached to the sandwiching surface of the infusion solution supply pipe is pressed against and closely adheres to the infusion solution supply pipe, the vibration transmitted to the infusion solution due to the dripping of the infusion solution in the drip cylinder can be reliably captured as the vibration of the airbag. Also, since the vibration detection sensor is attached to this airbag, the vibration of the airbag is detected by the vibration detection sensor, and vibration of the infusion solution is detected by the vibration detection sensor. In addition, there is no room for noise from the surroundings, and it is possible to reliably detect noise. Also, even if the diameter of the infusion supply pipe changes slightly,
Since the airbag deforms according to the diameter of the vip,
The light device supplies infusion solution with a diameter within a certain range (for example, 3 to 6 mm).
Can accommodate pipes.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of an embodiment of the present invention.

FIG. 2 is a schematic side view of an infusion drip device equipped with the infusion drop detection device of the present invention.

FIG. 3 is a schematic side view of a conventional infusion drip device.

[Explanation of symbols]

10 Vial Bottle 14 Tube Needle 18 Drip Tube 20 Vinyl Pipe 22 Clip Clipping Piece 24 Airbag 26 Roller Clamp 32 Vein Needle 34 Microphone 36 Infusion Supply Pipe Stenosis Device 38 Flow Controller

Claims (1)

[Claims] 1. A clip for holding an infusion solution supply pipe,
An under-infusion-droplet detection device comprising an air bag attached to the holding surface side of the clip and in close contact with an infusion solution supply pipe, and a vibration detection sensor attached to the air bag.