GB2113438A - Improvements in and relating to devices for use in treating nocturnal enuresis - Google Patents
Improvements in and relating to devices for use in treating nocturnal enuresis Download PDFInfo
- Publication number
- GB2113438A GB2113438A GB08228125A GB8228125A GB2113438A GB 2113438 A GB2113438 A GB 2113438A GB 08228125 A GB08228125 A GB 08228125A GB 8228125 A GB8228125 A GB 8228125A GB 2113438 A GB2113438 A GB 2113438A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detector pad
- excitation
- detector
- pad
- nocturnal enuresis
- 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.)
- Granted
Links
- 208000005346 nocturnal enuresis Diseases 0.000 title claims abstract description 10
- 208000008967 Enuresis Diseases 0.000 title claims abstract description 9
- 230000005284 excitation Effects 0.000 claims abstract description 12
- 210000002700 urine Anatomy 0.000 claims abstract description 8
- 229920000742 Cotton Polymers 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices ; Anti-rape devices
- A61F5/48—Devices for preventing wetting or pollution of the bed
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Nursing (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
A device for use in treating nocturnal enuresis comprising a detector pad 12 which is so formed as to have a complex impedance characteristic. An excitation device 10, 11 arranged for excitation of the detector pad 12 with a specific excitation waveform. A discriminator 13 is connected to a circuit including the detector pad 12 capable of determining the presence of urine on the detector pad for actuating an alarm device, 14. The detector pad 12 may comprise a metallic grid carried on a substrate of synthetic plastics material, preferably covered by a cotton sheet, and having variable capacitance and impedance according to the moisture deposited thereon. <IMAGE>
Description
SPECIFICATION
Improvements in and relating to devices for use in treating nocturnal enuresis
The invention relates to devices for use in treating nocturnal enuresis (bed wetting), which use a combination of urine detector pad and an electronic alarm to detect the presence of urine.
Such devices exist using a direct current or alternating current excitation of a detector pad and detecting a change in pure resistance between metallic contacts or a grip pattern. Each known device has the disadvantage that it cannot distinguish between a patch of urine and general dampness caused by perspiration. It is an object of the invention to endeavour to overcome such disadvantages.
According to the invention there is provided a device for use in treating nocturnal enuresis comprising a detector pad which is so formed as to have a complex impedance characteristic, an excitation device arranged for excitation of the detector pad with a specific excitation waveform and a discriminator connected to a circuit including the detector pad capable of determining the presence of urine on the detector pad for actuating an alarm device.
The detector pad may comprise a metallic grid carried on a substrate of synthetic plastics material, preferably covered by a cotton sheet, and having variable capacitance and impedance according to the moisture deposited thereon.
The excitation device may comprise a square wave generator connected to the detector pad via a wave shaping device.
The discriminator may comprise an amplitude detector. The alarm may comprise an audible alarm device.
The foregoing and further features of the invention may be more readily understood from the following description of a preferred embodiment thereof, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a block schematic diagram of a device for use in treating nocturnal enuresis;
Figure 2 is a simplified electrical circuit of the device of Figure 1;
Figure 3 is a simplified equivalent circuit of a detector pad of the device of Figure 1;
Figures 4A, 4B and 4C show waveform at portions of the circuit of Figure 2;
Figures 5A and 5B show alternative grid patterns for a detector pad of the device of Figures 1, and
Figure 6 is a practical circuit diagram of the device of Figure 1.
Referring now to Figure 1 there is shown a block diagram of a device for use in treating nocturnal enuresis. The device comprises a square wave generator 10 connected via a wave shaper 11 to excite a detector pad 12 which is located ina bed, in use. The detector pad 12 is connected via a discriminator 13, in the form of an amplitude detector, to an alarm device 14 for producing an audible alarm.
Figure 2 shows a simplified electrical circuitforthe device of Figure 1 and Figure 3 shows a simplified equivalent circuit of the detector pad 12. Figures 5A and 5B show practical examples of detector pad 12
comprising a synthetic plastics substrate 15 with a
metallic grid 16 formed thereon which may be
aluminium. Figure 6 shows a practical electrical
circuit for the device.
In use of the device the detector pad 12 is covered
by a cotton sheet, placed in the bed and actuated.
Referring again to Figure 2 the waveform occurring
at point A at the output of square wave generator 10
is shown in Figure 4A. When there is dampness on detector pad 12 due to perspiration the waveform occurring between points C and D is shown in Figure 4B and is formed since capacitance C1 (Figure 3) is the most prominent. When there is dampness on pad 12 due to the presence of urine capacitance C2 (Figure 3) is most prominent and the waveform shown in Figure 4C is profudced between points C and D of Figure 2. The discrimination 13 is arranged to actuate alarm 14 when a waveform as shown in
Figure 4C is produced but to not actuate alarm 14 when the waveform of Figure 4B is produced.
Hence it will be seen that an alarm device is disclosed which can detect between the presence of perspiration or urine on a detector pad.
Claims (7)
1. A device for use in treating nocturnal enuresis comprising a detector pad which is so formed as to have a complex impedance characteristic, an excitation device arranged for excitation of the detector pad with a specific excitation waveform and a discriminator connected to a circuit including the detector pad capable of determining the presence of urine on the detector pad for actuating an alarm device.
2. A device as claimed in claim 1 wherein the detector pad comprises a metallic grid carried on a substrate of synthetic plastics material and having variable capacitance and impedance according to the moisture deposited thereon.
3. A device as claimed in claim 2 wherein the metallic grid is covered by a cotton sheet.
4. A device as claimed in any preceding claim wherein the excitation device comprises a square wave generator connected to the detector pad via a wave shaping device.
5. A device as claimed in any preceding claim wherein the discriminator comprises an amplitude detector.
6. A device as claimed in any preceding claim wherein the alarm device comprises an audible alarm device.
7. A device for use in treating nocturnal enuresis substantially as herein before described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08228125A GB2113438B (en) | 1981-10-02 | 1982-10-01 | Improvements in and relating to devices for use in treating nocturnal enuresis |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8129777 | 1981-10-02 | ||
| GB08228125A GB2113438B (en) | 1981-10-02 | 1982-10-01 | Improvements in and relating to devices for use in treating nocturnal enuresis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2113438A true GB2113438A (en) | 1983-08-03 |
| GB2113438B GB2113438B (en) | 1985-08-29 |
Family
ID=26280874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08228125A Expired GB2113438B (en) | 1981-10-02 | 1982-10-01 | Improvements in and relating to devices for use in treating nocturnal enuresis |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2113438B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2162980A (en) * | 1984-08-09 | 1986-02-12 | David Logan Murphy | An enuretic detector |
| GB2177247A (en) * | 1985-06-03 | 1987-01-14 | Nippon Kodoshi Corp | Water content detecting device for diaper |
| GB2182181A (en) * | 1985-02-23 | 1987-05-07 | Arthur Leonard Lewis | Wet blanket loft sensor |
| GB2201021A (en) * | 1987-02-11 | 1988-08-17 | Conax Florida Corp | Fluid conductivity sensor |
| EP0287441A1 (en) * | 1987-04-17 | 1988-10-19 | Pierre Nigay | Set for the incontinent |
| FR2613931A2 (en) * | 1983-11-21 | 1988-10-21 | Nigay Pierre | Unit for the incontinent |
| US5121630A (en) * | 1990-12-21 | 1992-06-16 | Calvin Noel M | Material monitoring device |
| WO1995011645A1 (en) * | 1993-10-29 | 1995-05-04 | Hill-Rom, Inc. | Incontinence detection device |
-
1982
- 1982-10-01 GB GB08228125A patent/GB2113438B/en not_active Expired
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2613931A2 (en) * | 1983-11-21 | 1988-10-21 | Nigay Pierre | Unit for the incontinent |
| GB2162980A (en) * | 1984-08-09 | 1986-02-12 | David Logan Murphy | An enuretic detector |
| GB2182181A (en) * | 1985-02-23 | 1987-05-07 | Arthur Leonard Lewis | Wet blanket loft sensor |
| GB2177247A (en) * | 1985-06-03 | 1987-01-14 | Nippon Kodoshi Corp | Water content detecting device for diaper |
| US4754264A (en) * | 1985-06-03 | 1988-06-28 | Nippon Kodoshi Corporation | Water content detecting device for diaper |
| GB2177247B (en) * | 1985-06-03 | 1989-07-26 | Nippon Kodoshi Corp | Water content detecting device for diaper |
| GB2201021A (en) * | 1987-02-11 | 1988-08-17 | Conax Florida Corp | Fluid conductivity sensor |
| GB2201021B (en) * | 1987-02-11 | 1991-07-10 | Conax Florida Corp | Fluid conductivity sensor |
| EP0287441A1 (en) * | 1987-04-17 | 1988-10-19 | Pierre Nigay | Set for the incontinent |
| US5121630A (en) * | 1990-12-21 | 1992-06-16 | Calvin Noel M | Material monitoring device |
| WO1992011529A1 (en) * | 1990-12-21 | 1992-07-09 | Noel Morgen Calvin | Material monitoring device |
| WO1995011645A1 (en) * | 1993-10-29 | 1995-05-04 | Hill-Rom, Inc. | Incontinence detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2113438B (en) | 1985-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19991001 |