GB2311599A - Light sensor mounting - Google Patents
Light sensor mounting Download PDFInfo
- Publication number
- GB2311599A GB2311599A GB9606776A GB9606776A GB2311599A GB 2311599 A GB2311599 A GB 2311599A GB 9606776 A GB9606776 A GB 9606776A GB 9606776 A GB9606776 A GB 9606776A GB 2311599 A GB2311599 A GB 2311599A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- sensor
- light sensor
- mounting means
- skin
- 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.)
- Withdrawn
Links
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000000063 preceeding effect Effects 0.000 claims 2
- 238000005259 measurement Methods 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 3
- 239000008280 blood Substances 0.000 description 3
- 210000005259 peripheral blood Anatomy 0.000 description 3
- 239000011886 peripheral blood Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000013186 photoplethysmography Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/026—Measuring blood flow
- A61B5/0261—Measuring blood flow using optical means, e.g. infrared light
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Cardiology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Hematology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physiology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Description
LIGHT SENSOR MOUNTING
This invention relates to non-invasive means for detecting and measuring blood flow by means of light sensors used in for example in photoplethysmography, light reflection rheography or the like.
Such light sensors usually consist of one or more light sources and one or more receivers that register the light absorbed by the blood over which the sensor is placed. The amount of light received is proportional to the amount of blood in the peripheral blood vessels in the area.
In use, the sensor is placed on the surface of the skin of any part of the body.
It is known to secure such sensors onto the skin surface by means of adhesive applied to the periphery of the sensor casing avoiding the central area where the light source(s) and receiver(s) are mounted.
However, such light sensors suffer from the drawbacks of poor accuracy and lack of reproducibility due to variability in the light received by the receiver(s) and pressures applied by the device on the skin surface thereby pressing the blood out of the peripheral blood vessels.
Accordingly, the invention improves the accuracy of the measurements, and provides a means for fixing the light sensor on the surface of the skin wherein the means provides a light coupling and a consistent skin contact surface.
Advantageouosly, the means provides a controlled path of light to and from the sensor whilst also providing a secure and consistent contact surface during the measurements. The means for mounting the sensor covers the whole of the face contacting the skin surface which has the advantage of spreading the mechanical load of the sensor over a greater contact surface area of the skin thereby reducing the interference with the blood flow in the peripheral blood vessels.
Conveniently, the means for fixing may be double sided tape and more preferably semi-opaque for improved light dispersal.
The invention will now be further described by way of example and with reference to the drawing.
Fig.1 shows the light sensor and adhesive means in accordance with the invention.
The light sensor (10) comprises a casing (12) having a face provided with a window (not shown) for contacting the skin surface (11). One or more light source mounted within the casing to overlie the window so that light is directed through the window towards a field to be measured.
One or more receivers, i.e. photo sensitive cells can be mounted within the casing near the light source(s) so that the receiver(s) register the light reflected back from the field to be measured.
In accordance with an embodiment of the invention, a disc (15) of clear double sided adhesive tape is placed on the surface of the skin over the field to be measured.
The disc (15) corresponds to the total face area of the casing (12) including the window. The casing (12) is then placed onto the disc (15) so that it is fixed onto the skin surface. The disc extends over the total surface of the light sensor (10) in contact with the skin surface.
The disc (15) provides a secure fixing for the light sensor (10) during the measurements as well as providing an improved light coupling and consistent contact surface. The disc can be semi-opaque in which case it also acts as a light dispersal system.
The provision of the tape disc (15) between the light sensor and the skin surface greatly improves the accuracy of the measurement.
Claims (6)
1. A mounting means for fixing a light sensor onto a skin surface comprising a
light coupling and a consistent contact surface.
2. A mounting means as claimed in claim 1 wherein the means provides a
controlled path of light to and from the sensor.
3. A mounting means as claimed in any preceeding claim wherein the means
covers substantially the whole of the face of the light sensor to be in contact
with the skin.
4. A mounting means as claimed in any preceeding claim wherein the means
comprises double-sided tape.
5. A mounting means as claimed in claim 4 wherein the tape is semi-opaque.
6. A mounting means substantially as herein described with reference to and as
illustrated in the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9606776A GB2311599A (en) | 1996-03-29 | 1996-03-29 | Light sensor mounting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9606776A GB2311599A (en) | 1996-03-29 | 1996-03-29 | Light sensor mounting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9606776D0 GB9606776D0 (en) | 1996-06-05 |
| GB2311599A true GB2311599A (en) | 1997-10-01 |
Family
ID=10791358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9606776A Withdrawn GB2311599A (en) | 1996-03-29 | 1996-03-29 | Light sensor mounting |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2311599A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3602213A (en) * | 1968-02-13 | 1971-08-31 | Prototypes Inc | Apparatus for photoelectric dermachromography |
| EP0127947B1 (en) * | 1983-05-11 | 1990-08-29 | Nellcor Incorporated | Sensor having cutaneous conformance |
| US5054488A (en) * | 1989-04-20 | 1991-10-08 | Nicolay Gmbh | Optoelectronic sensor for producing electrical signals representative of physiological values |
-
1996
- 1996-03-29 GB GB9606776A patent/GB2311599A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3602213A (en) * | 1968-02-13 | 1971-08-31 | Prototypes Inc | Apparatus for photoelectric dermachromography |
| EP0127947B1 (en) * | 1983-05-11 | 1990-08-29 | Nellcor Incorporated | Sensor having cutaneous conformance |
| US5054488A (en) * | 1989-04-20 | 1991-10-08 | Nicolay Gmbh | Optoelectronic sensor for producing electrical signals representative of physiological values |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9606776D0 (en) | 1996-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |