Claims
- 1. A method for optically measuring a characteristic of a patient's blood comprising the following steps:
- applying to a predetermined location on the patient's skin a blood perfused tissue altering substance without the use of iontophoresis;
- placing a sensor on the predetermined location of the patient's skin, the sensor comprising a light source and a photodetector;
- transmitting light from the light source into the patient's skin at the predetermined location;
- detecting light with the photodetector at the predetermined location; and
- measuring a characteristic of the patient's blood based on the detected light.
- 2. The method of claim 1 wherein said substance is a counterirritant.
- 3. A sensor system comprising:
- an optical sensor;
- an adhesive patch means for attaching the optical sensor to a sensor site on a patient's skin and
- for applying a blood perfused tissue altering substance to the sensor site.
- 4. The sensor of claim 3 wherein said adhesive patch means has holes for allowing light to pass from said optical sensor.
- 5. The system of claim 3 wherein said substance is a counterirritant.
Parent Case Info
This is a continuation of application Ser. No. 07/722,645, filed Jun. 28, 1991, now U.S. Pat. No. 5,267,563.
US Referenced Citations (14)
Non-Patent Literature Citations (3)
Entry |
"Medical Reflection Photometry", Zijlstra & Mook, Van Gorcum's Medical Library nr. 152, The Netherlands, 1962. |
Federal Registers, vol. 44, No. 234, Dec. 4, 1979, pp. 69768 and 69830. |
"Drug Facts and Comparisons" 1986, pp. 617-619, Facts and Comparisons Div., St. Louis, J. B. Lippincott Company. |
Continuations (1)
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Number |
Date |
Country |
Parent |
722645 |
Jun 1991 |
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