Skin Preparation Composition for Improving Signal Stability with Vital Signs and Other Biological Sensors
Publication Date: 2014-Mar-31
The IP.com Prior Art Database
Formulation useful as skin preparation to improve signal stability of biosensors.
Inventor: Roger D. Lipman
Description of Invention: Formulation useful as skin preparation to improve signal stability of biosensors.
Nature of the Problem: Long term monitoring or measurement of vital signs, which in practice means monitoring over a period of say 4-7 days with the same patch or skin adherent device, is subject to degradation in the electrical signal arising from the variable measured. Little work seems to have been published on use of a "skin prep" to reduce the variability of the skin substrate and to stabilize skin impedance. The present invention proposes a formulation to accomplish this.
Utilization of Invention: As adjunct product for use with long term wearable sensor devices.
Detailed Description of the Invention: 50% solution of polyvinyl acetate (eg Mowilith 50) is dissolved in isopropyl alcohol or a mixture of isopropyl alcohol and ethyl acetate. Aqueous dispersion of 80% Ag plus aqueous dispersion of 20% AgCl added to the solution of Mowilith 50. Electrolytes NaCl and or KCl may also be present in the amount of 0.1 to 2wt% of total formulation. Minimum amount of silver TBD. Suspension is painted on skin only under where electrodes will be placed. Allow to dry. (Note there cannot be a continuous coating on skin otherwise electrodes will be short-circuited.) Also, an interpenetrating network hydrogel membranes of sodium alginate and po...