CA2043126A1 - Drip chamber - Google Patents
Drip chamberInfo
- Publication number
- CA2043126A1 CA2043126A1 CA002043126A CA2043126A CA2043126A1 CA 2043126 A1 CA2043126 A1 CA 2043126A1 CA 002043126 A CA002043126 A CA 002043126A CA 2043126 A CA2043126 A CA 2043126A CA 2043126 A1 CA2043126 A1 CA 2043126A1
- Authority
- CA
- Canada
- Prior art keywords
- drip
- drip chamber
- tube
- tubular body
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Abstract of the Disclosure A drip chamber comprising a tubular body made of synthetic resin and provided with attachment tubes for liquid-introducing tubes at an upper portion and at a lower portion of the tubular body respectively. A
screwed bar is provided in the upper attachment tube.
Infusion liquid drips in a drop of uniform size at equal intervals, so that liquid infusion can be carried out always without anxiety when parenteral solution is infused into a patient s vein, especially, children' vein.
screwed bar is provided in the upper attachment tube.
Infusion liquid drips in a drop of uniform size at equal intervals, so that liquid infusion can be carried out always without anxiety when parenteral solution is infused into a patient s vein, especially, children' vein.
Description
~312~
D_ CHAMBER
BACKGROUND OF THE~ TENTION
The present invention relates to a drip chamber, particularly a drip chamber for children, in a drip set widely used in infusion of liquids, and the 5 like. A drip chamber is generally made of transparent synthetic resin, and is provided with attachment tubes for liquid-introducing tubes at its upper portion and lower portion. A drip tube is provided in the attachment tube at the upper portion of the drip chamber.
As is well known, drip chambers of this kind are incorporated into parenteral fluid sets for the use. When infusion liquid such as glucose and physiological salt solution contained in, for example, a vial is infused into the body from an intravenous needle 15 by way of the above fluid set by usual method, the infusion liquid in the vial continuously drips by gravity into the drip chamber through a vial needle.
The dripping rate is generally set to about 4 mQ per 60 drips for adults, or about 1 mQ per 60 drips for 20 children. For maintaining such dripping rate, inner diameter of the drip tube is generally designed to be about 0. 9 mm for children while the same is designed to be about 4.1 mm for adults.
In the above-mentioned drip chamber, no problem 25 occurs in general in the case of drip chambers for adults in relation to dripping rate. In the case of drip chambers for children, however, child patients are sometimes endangered because of receiving a shock coming from irregular drips.
3 0 In order to remove such ununiformity of dripping, a stainless pipe having a length of 10 to 4 0 mm, an outer diameter of about 0. 9 mm and an inner diameter of 0. 5 mm has been used as a drip pipe.
However, it has been found that sufficient effect cannot 3 5 be obtained by the above stainless pipe. It has been also found that uniform drops drip at equal intervals if 20~3 ~
the stainless pipe is much longer. However, such long stainless pipe requires large space so that the size of a drip chamber goes beyond practical range, thereby it is hard to realize the drip chamber.
The present invention was made to solve the above-mentioned drawback of the conventional drip chamber, and it is an object of the present invention to provide a drip chamber capable of dripping drops of uniform size at equal intervals.
SUMMARY OF THE INVENTION
In accordance with the present invention, there is provided a drip chamber comprising a tubular body made of synthetic resin and provided with attachment tubes for liquid-introducing tubes at an upper portion and at a lower portion of the tubular body respectively, a screwed bar being provided in the attachment tube at the upper portion of the tubular body, and a drip tube being provided at a lower end of the attachment tube at 2 0 the upper portion of the tubular body.
BRIEF EXPLANATION OF THE DRAWING
Fig. 1 is a sectional view of an embodiment of a drip chamber of the present invention.
DETAILED DESCRIPTION
Now, a drip chamber of the present invention is explained based on the accompanying drawing.
As shown in Fig. 1, a drip chamber comprises a 3 0 tubular body 1 made of transparent synthetic resin such as polyvinyl chloride and polyolefine. The tubular body 1 has attachment tubes 6, 7 for liquid-introducing tubes 2, 3 at its upper end and lower end respectively. A
screwed bar 5 is provided in the upper attachment tube 3 5 6. A drip tube 4 is provided at a lower end of the upper attachment tube 6. In the embodiment of Fig. 1, the drip tube 4 is formed integrally with the upper attachment tube 6. At one end portion of the screwed 20~3~ 2~
bar 5, there is formed a longitudinal groove 9 communicating with the drip tube 5.
In order to achieve an object of the present invention, i.e. in order to realize drops of uniform 5 volume at equal intervals, i t is important that the infusion liquid is in the form of laminar flow just before it drips from the drip tube 4. For this purpose, it is advantageous that the infusion liquid passes through a narrow drip pipe. Such narrow drip pipe, 10 however, requires some degree of length so that it cannot be contained in an ordinary drip chamber. ~)n the contrary, the screwed bar 5 is used in the present invention so that it does not require a large space. By employing such a screwed bar, each portion of the 15 infusion liquid is not mixed with one another in the drip tube 4 and flows so smoothly as to draw a locus.
Next, the effect of the present invention is concretely explained based on Example.
0. 9 % sodium chloride solution was dripped 20 using a drip chamber having a spiral tube (pitch: 1.0 to 1. 2 mm, total length : 5 0 mm) and a straight drip tube (length : 8 mm, inner diameter : 0. 5 mm) connected to the spiral tube.
As Comparative Example, 0. 9 % sodium chloride 25 solution was dripped using a drip chamber having a drip tube (length: 25 mm, inner diameter: 0.5 mm).
Dripping intervals (second) of Example and Comparative Example were measured with respect to eleven drops (that is to say, ten dripping intervals were 30 measured). The results are shown in Table 1.
20~ ~v Table 1 ... . .. . . .
Dripping Intervals (second) 1 2 3 4 5 6 7 8 9 10 Average R~
Ex. 1.3 1.3 1.4 1.3 1.4 1.4 1.3 1.3 1.3 1.3 1.33 0.1 Com. 1.5 1.2 1.4 1.2 1.5 1.1 1.4 1.1 1.4 1.1 1.29 0.4 * Range As it is clear from Table 1, very stable dripping can be realized by employing a drip tube 15 comprising a spiral tube.
As explained above, according to the drip chamber of the present invention, a screwed bar is provided in the upper attachment tube so that the infusion liquid drips drops by drops at equal intervals 20 and transforms into drops of uniform volume.
Accordingly, when parentera] solution is infused into a patient s vein, especially, children' vein through liquid-introducing tubes and an intravenous needle by usual method, infusion of liquids can be carried out 25 always without anxiety.
D_ CHAMBER
BACKGROUND OF THE~ TENTION
The present invention relates to a drip chamber, particularly a drip chamber for children, in a drip set widely used in infusion of liquids, and the 5 like. A drip chamber is generally made of transparent synthetic resin, and is provided with attachment tubes for liquid-introducing tubes at its upper portion and lower portion. A drip tube is provided in the attachment tube at the upper portion of the drip chamber.
As is well known, drip chambers of this kind are incorporated into parenteral fluid sets for the use. When infusion liquid such as glucose and physiological salt solution contained in, for example, a vial is infused into the body from an intravenous needle 15 by way of the above fluid set by usual method, the infusion liquid in the vial continuously drips by gravity into the drip chamber through a vial needle.
The dripping rate is generally set to about 4 mQ per 60 drips for adults, or about 1 mQ per 60 drips for 20 children. For maintaining such dripping rate, inner diameter of the drip tube is generally designed to be about 0. 9 mm for children while the same is designed to be about 4.1 mm for adults.
In the above-mentioned drip chamber, no problem 25 occurs in general in the case of drip chambers for adults in relation to dripping rate. In the case of drip chambers for children, however, child patients are sometimes endangered because of receiving a shock coming from irregular drips.
3 0 In order to remove such ununiformity of dripping, a stainless pipe having a length of 10 to 4 0 mm, an outer diameter of about 0. 9 mm and an inner diameter of 0. 5 mm has been used as a drip pipe.
However, it has been found that sufficient effect cannot 3 5 be obtained by the above stainless pipe. It has been also found that uniform drops drip at equal intervals if 20~3 ~
the stainless pipe is much longer. However, such long stainless pipe requires large space so that the size of a drip chamber goes beyond practical range, thereby it is hard to realize the drip chamber.
The present invention was made to solve the above-mentioned drawback of the conventional drip chamber, and it is an object of the present invention to provide a drip chamber capable of dripping drops of uniform size at equal intervals.
SUMMARY OF THE INVENTION
In accordance with the present invention, there is provided a drip chamber comprising a tubular body made of synthetic resin and provided with attachment tubes for liquid-introducing tubes at an upper portion and at a lower portion of the tubular body respectively, a screwed bar being provided in the attachment tube at the upper portion of the tubular body, and a drip tube being provided at a lower end of the attachment tube at 2 0 the upper portion of the tubular body.
BRIEF EXPLANATION OF THE DRAWING
Fig. 1 is a sectional view of an embodiment of a drip chamber of the present invention.
DETAILED DESCRIPTION
Now, a drip chamber of the present invention is explained based on the accompanying drawing.
As shown in Fig. 1, a drip chamber comprises a 3 0 tubular body 1 made of transparent synthetic resin such as polyvinyl chloride and polyolefine. The tubular body 1 has attachment tubes 6, 7 for liquid-introducing tubes 2, 3 at its upper end and lower end respectively. A
screwed bar 5 is provided in the upper attachment tube 3 5 6. A drip tube 4 is provided at a lower end of the upper attachment tube 6. In the embodiment of Fig. 1, the drip tube 4 is formed integrally with the upper attachment tube 6. At one end portion of the screwed 20~3~ 2~
bar 5, there is formed a longitudinal groove 9 communicating with the drip tube 5.
In order to achieve an object of the present invention, i.e. in order to realize drops of uniform 5 volume at equal intervals, i t is important that the infusion liquid is in the form of laminar flow just before it drips from the drip tube 4. For this purpose, it is advantageous that the infusion liquid passes through a narrow drip pipe. Such narrow drip pipe, 10 however, requires some degree of length so that it cannot be contained in an ordinary drip chamber. ~)n the contrary, the screwed bar 5 is used in the present invention so that it does not require a large space. By employing such a screwed bar, each portion of the 15 infusion liquid is not mixed with one another in the drip tube 4 and flows so smoothly as to draw a locus.
Next, the effect of the present invention is concretely explained based on Example.
0. 9 % sodium chloride solution was dripped 20 using a drip chamber having a spiral tube (pitch: 1.0 to 1. 2 mm, total length : 5 0 mm) and a straight drip tube (length : 8 mm, inner diameter : 0. 5 mm) connected to the spiral tube.
As Comparative Example, 0. 9 % sodium chloride 25 solution was dripped using a drip chamber having a drip tube (length: 25 mm, inner diameter: 0.5 mm).
Dripping intervals (second) of Example and Comparative Example were measured with respect to eleven drops (that is to say, ten dripping intervals were 30 measured). The results are shown in Table 1.
20~ ~v Table 1 ... . .. . . .
Dripping Intervals (second) 1 2 3 4 5 6 7 8 9 10 Average R~
Ex. 1.3 1.3 1.4 1.3 1.4 1.4 1.3 1.3 1.3 1.3 1.33 0.1 Com. 1.5 1.2 1.4 1.2 1.5 1.1 1.4 1.1 1.4 1.1 1.29 0.4 * Range As it is clear from Table 1, very stable dripping can be realized by employing a drip tube 15 comprising a spiral tube.
As explained above, according to the drip chamber of the present invention, a screwed bar is provided in the upper attachment tube so that the infusion liquid drips drops by drops at equal intervals 20 and transforms into drops of uniform volume.
Accordingly, when parentera] solution is infused into a patient s vein, especially, children' vein through liquid-introducing tubes and an intravenous needle by usual method, infusion of liquids can be carried out 25 always without anxiety.
Claims
1. A drip chamber comprising a tubular body made of synthetic resin and provided with attachment tubes for liquid-introducing tubes at an upper portion and at a lower portion of the tubular body respectively, a screwed bar being provided in the attachment tube at the upper portion of the tubular body, and a drip tube being provided at a lower end of the attachment tube at the upper portion of the tubular body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5936290U JPH0418542U (en) | 1990-06-05 | 1990-06-05 | |
| JP59362/1990 | 1990-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2043126A1 true CA2043126A1 (en) | 1991-12-06 |
Family
ID=13111084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002043126A Abandoned CA2043126A1 (en) | 1990-06-05 | 1991-05-23 | Drip chamber |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0418542U (en) |
| BR (1) | BR9102316A (en) |
| CA (1) | CA2043126A1 (en) |
| IT (1) | IT1247969B (en) |
-
1990
- 1990-06-05 JP JP5936290U patent/JPH0418542U/ja active Pending
-
1991
- 1991-05-23 CA CA002043126A patent/CA2043126A1/en not_active Abandoned
- 1991-06-04 BR BR919102316A patent/BR9102316A/en not_active Application Discontinuation
- 1991-06-04 IT ITMI911514A patent/IT1247969B/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| IT1247969B (en) | 1995-01-05 |
| ITMI911514A0 (en) | 1991-06-04 |
| BR9102316A (en) | 1992-01-14 |
| JPH0418542U (en) | 1992-02-17 |
| ITMI911514A1 (en) | 1992-12-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19951123 |