JP4624613B2 - Body fluid suction system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a body fluid suction system used for taking out clogged sputum and nasal discharge.
[0002]
[Prior art]
Sick and sick people who are weak in physical strength may not be able to spit out the throat clogged on their own, and are taken out by medical facilities and caregivers. Similarly, when an infant or the like clogs nasal discharge, the parent or the like sucks out nasal discharge with his / her mouth. In medical facilities, these body fluids are taken out using a suction source such as a vacuum pump, but the suction device is large and difficult to move, and it is troublesome to clean and disinfect the suction tube and sputum after use. There was. Even after cleaning and disinfection, there was always a risk of infection when reused.
[0003]
On the other hand, in a general household without such a suction device, a method of sucking out by mouth using a suction tube like a straw has been taken. For this reason, sputum or the like may enter the mouth, and there is a risk that the patient's illness will become infected, which has become a major sanitary or mental problem.
[0004]
Therefore, in order to solve such problems, a disposable body fluid filter unit and body fluid suction device have been devised by the present inventors (Japanese Patent Application No. 11-323515, PCT / JP00 / 08064). This disposable body fluid filter unit or the like is used as a body fluid suction system that combines a body fluid filter unit, a suction source, a suction tube, and a suction tube.
[0005]
Therefore, a body fluid suction system that is safer and easier to handle is desired.
[0006]
[Problems to be solved by the invention]
That is, an object of the present invention is to improve the quality of life of a patient by providing a body fluid suction system that is further safe and easy to handle.
[0007]
[Means for Solving the Problems]
The bodily fluid suction system of the present invention includes a suction source that drives a driving means to suck air from a suction port, a suction tube connected to the suction port, a filter unit connected to the suction tube, and the filter unit A suction tube connected to the suction tube, the suction source is driven to inhale body fluid of a predetermined part of the human body from the tip of the suction tube, and the inhaled body fluid is guided and stored in the filter unit so that only air is stored. In the bodily fluid suction system that leads from the filter unit to the suction source through the suction tube, the fluid friction of the suction tube is less than the fluid friction of the suction tube.
[0008]
Further, the bodily fluid suction system of the present invention includes a suction source that drives the driving means to suck air from the suction port, a suction tube connected to the suction port, a filter unit connected to the suction tube, A suction tube connected to the filter unit, the suction source is driven to inhale body fluid of a predetermined part of the human body from the tip of the suction tube, and the inhaled body fluid is guided and stored in the filter unit, and only air In the body fluid suction system that guides the fluid from the filter unit to the suction source through the suction tube, the fluid friction of the suction tube and the filter unit is smaller than the fluid friction of the suction tube.
[0009]
The bodily fluid suction system according to the present invention is characterized in that, in the bodily fluid suction system, the suction tube is longer than the suction tube.
[0010]
The bodily fluid suction system of the present invention is characterized in that in the bodily fluid suction system, the gas friction of the suction tube is smaller than the liquid friction of the suction tube.
[0011]
Moreover, the bodily fluid suction system of the present invention is characterized in that, in the bodily fluid suction system, an inner diameter of the suction tube is larger than an inner diameter of the suction tube.
[0012]
Further, the bodily fluid suction system of the present invention includes a suction source that drives the driving means to suck air from the suction port, a suction tube connected to the suction port, a filter unit connected to the suction tube, A suction tube connected to the filter unit, the suction source is driven to inhale body fluid of a predetermined part of the human body from the tip of the suction tube, and the inhaled body fluid is guided and stored in the filter unit, and only air In the body fluid suction system that guides the fluid from the filter unit to the suction source through the suction tube, the fluid friction of the suction tube is stabilized to be substantially constant after the suction source is driven to start sucking the body fluid from the suction tube. It is characterized by doing.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, one embodiment of a bodily fluid suction system according to the present invention will be described in detail based on the drawings.
[0014]
1 and 2 show a bodily fluid suction system 200 which is a particularly useful embodiment of the bodily fluid suction system according to the present invention. The body fluid suction system 200 includes a suction source 24 that drives a driving unit to suck air from a suction port 202, a suction tube 21 connected to the suction port 202, a filter unit 10 connected to the suction tube 21, A catheter (suction tube) 20 connected to the filter unit 10. The body fluid suction system 200 drives the suction source 24 to inhale the body fluid 100 of the human body 214 from the distal end 212 of the catheter 20, guides and stores the inhaled body fluid 100 into the filter unit 10, and sucks only air from the filter unit 10. It is possible to guide to the suction source 24 through the tube 21.
[0015]
Further, the fluid friction of the suction tube 21 and the filter unit 10 of the body fluid suction system 200 is smaller than the fluid friction of the catheter 20. That is, the total value of the pressure loss value of the suction tube 21 and the pressure loss value of the filter unit 10 is smaller than the pressure loss value of the catheter 20. Further, the suction tube 21 of the body fluid suction system 200 is longer than the catheter 20. Further, the inner diameter of the suction tube 21 of the body fluid suction system 200 is larger than the inner diameter of the catheter 20.
[0016]
As shown in FIG. 3, the filter unit 10 of the bodily fluid suction system 200 includes an inlet 14 connected to an inhalation tube 20 for inhaling the bodily fluid 100, and a hermetic seal that separates and stores the bodily fluid 100 inhaled with air The body fluid reservoir chamber 18, the filter 12 through which the inhaled air passes, and the suction port 16 connected to the suction source 24 are included. A backflow prevention valve 94 is provided. Further, a HEPA filter (High Efficiency Particulate Air Filter) 96 is provided so that the body fluid 100 does not enter the suction tube 21 due to a synergistic effect with the body fluid reservoir chamber 18.
[0017]
When such a body fluid suction system 200 is used to remove the body fluid 100 of the bronchus of the human body 214, the distal end 212 of the catheter 20 is inserted into the bronchus of the human body 214 and stored in the filter unit 10. Only air is sucked into the suction source 24 via the suction tube 21.
[0018]
During operation of the body fluid suction system 200, the absolute value of the negative direction of the suction pressure of the body fluid suction system 200 increases in accordance with the distance from the distal end 212 of the catheter 20, as indicated by the solid line α in FIG. Further, the suction pressure changes rapidly in the catheter region A, and the suction pressure hardly changes in the filter unit region B and the suction tube region C. This is because the fluid friction of the suction tube 21 and the filter unit 10 is smaller than the fluid friction of the catheter 20. Therefore, unlike the solid line β, the solid line α does not move away from the dotted line γ indicating the pressure P0 (40 kPa) of the JIS standard in the negative direction.
[0019]
On the other hand, in the case of the conventional body fluid suction means, the suction pressure also changes abruptly in the filter unit region B and the suction tube region C as shown by the solid line β in FIG. As shown in FIG. 5, the conventional body fluid suction means is a body fluid suction means 230 configured by combining a suction source 220, a suction tube 222, a filter 224, a suction bottle 226, and a catheter 228. is there. In the case of the body fluid suction means 230, the catheter 228 is longer than the suction tube 222. Further, body fluid may flow out from the suction bottle 226 toward the suction source 220, and the fluid friction of the portion including the suction bottle 226, the suction tube 222 and the filter 224 may be larger than the fluid friction of the catheter 228.
[0020]
Further, in the case of the body fluid suction system 200, as indicated by a solid line Δ in FIG. 6, the suction pressure is stabilized at a value close to the pressure P0 of the JIS standard as time passes after the operation starts. This is because the body fluid 100 does not enter the suction tube 21 and the fluid friction of the filter unit 10 is smaller than the fluid friction of the catheter 20.
[0021]
On the other hand, in the case of the conventional body fluid suction means 230, when the body fluid 100 is filled in the catheter 228 and the extension tube 229 as time passes after the start of operation, the suction pressure is JIS standard as shown by the solid line ε in FIG. A change occurs in which the absolute value in the negative direction becomes larger than the pressure P0.
[0022]
As mentioned above, although embodiment of the bodily fluid suction system of this invention was described in detail based on drawing, the bodily fluid suction system of this invention can be implemented also in other embodiment.
[0023]
For example, the filter unit only needs to store inhaled body fluid and send only air to the suction tube.
[0024]
In addition, the technical scope of the present invention includes embodiments in which various improvements, modifications, and variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Moreover, you may implement with the form which substituted any invention specific matter to the other technique within the range which the same effect | action or effect produces. Moreover, even if the invention specific matter comprised integrally is comprised from several members, you may implement in the form which comprised the invention specific matter comprised from several members integrally.
[0025]
【The invention's effect】
According to the body fluid suction system of the present invention, the fluid friction of the suction tube or the suction tube and the filter unit is smaller than the fluid friction of the suction tube.
Even if the suction tube is made longer, an increase in fluid friction can be suppressed as much as possible. For this reason, it is possible to prevent pathogens and the like from leaking outside the body fluid suction system by making the suction tube longer and extending the path from the filter unit to the suction source. For this reason, safety can be improved. Further, since the necessity of cleaning the suction source or the like is reduced, portability is improved and the quality of life of the patient is improved.
[0026]
Moreover, according to the bodily fluid suction system of the present invention in which the suction tube is longer than the suction tube, the suction tube can be made longer and the path from the filter unit to the suction source can be made longer.
[0027]
Further, according to the body fluid suction system of the present invention in which the inner diameter of the suction tube is larger than the inner diameter of the suction tube, the fluid friction in the suction tube is inevitably smaller than the fluid friction in the suction tube. For this reason, it becomes possible to make a suction tube longer.
[0028]
In addition, according to the body fluid suction system in which the fluid friction of the suction tube stabilizes substantially constant after the start of body fluid suction, the suction pressure does not change abruptly, so that the human body is not damaged by excessive suction pressure. .
[Brief description of the drawings]
FIG. 1 shows an example of a bodily fluid suction system according to the present invention.
FIG. 2 is a piping diagram of the bodily fluid suction system shown in FIG.
FIG. 3 is a cross-sectional view of the filter unit of the body fluid suction system shown in FIG. 1;
4 is a graph showing the relationship between the distance from the catheter tip and the suction pressure when the bodily fluid suction system shown in FIG. 1 is used.
FIG. 5 shows an example of a conventional body fluid suction system.
FIG. 5 is a graph showing the relationship between the suction time and the suction pressure when the bodily fluid suction system shown in FIG. 1 is used.
[Explanation of symbols]
10: filter unit 12: filter 14: suction port 18: body fluid reservoir 20: catheter (suction tube)
21: Suction tube 24: Suction source 100: Body fluid 200: Body fluid suction system 202: Suction port 212: Tip 214: Human body

Claims (3)

A suction source that drives the driving means to suck air from the suction port, a suction tube connected to the suction port, a filter unit connected to the suction tube, and a suction tube connected to the filter unit The suction source is driven to inhale the body fluid of a predetermined part of the human body from the tip of the suction tube, and the inhaled body fluid is guided and stored in the filter unit, and only air is passed from the filter unit through the suction tube. A body fluid suction system in which a backflow prevention valve is provided on the suction tube side of the body fluid reservoir chamber and a HEPA filter is provided on the suction tube side of the body fluid reservoir chamber. The body fluid suction system according to claim 1 , wherein the suction tube is longer than the suction tube. The bodily fluid suction system according to claim 1, wherein an inner diameter of the suction tube is larger than an inner diameter of the suction tube.

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