Medtronic, Inc.

Hospital Marketing Services Co., Inc.

George Jordan

James J Perrault

A visual (as opposed to mechanical or electronic) method for detecting the state of dehydration (or hydration) of a biomedical hydrogel is disclosed. The method contemplates incorporating a pH sensitive indicator into the hydrogel as it is prepared and applying the hydrogel to the skin-contacting surface of a biomedical device such as an electrode. Shortly before the biomedical device is to be used, the color of the hydrogel on the device is visually compared with its freshly-prepared color to determine the approximate state of dehydration of the gel.

Methods for detecting dehydration of a biomedical hydrogel

A refrigerating package is disclosed which comprises a multicompartment gussetted design in which the gusset is formed of a folded in or pleated section, with liquid being placed therein. The gussetted compartment is folded into another compartment and is sealed, the other compartment receiving a refrigerating chemical, the opening of the other compartment being sealed after the refrigerating chemicals are loaded therein. By direct application of pressure to the gussetted compartment, a rupture takes place allowing the liquid container therein to mix with the refrigerating chemical thus producing an endothermic or exothermic reaction, as desired.

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Fairfield, CT, United States of America

George Jordan