Abstract: Intestinal ischemia is diagnosed non-invasively by scanning the abdomen externally with a SQUID magnetometer which measures the magnetic field produced by smooth muscle electrical activity. These measurements are processed to determine the basic electrical rhythm (BER) frequency at various locations along the intestine. A nominal value for the BER frequency is established at each location, and if the measured value falls below the associated nominal value by more than a predetermined margin, ischemia at that location is indicated. Ischemia is further indicated by an interval of arrhythmia in which the BER frequency increases to a range of about 24-180 cpm or at least about twice the nominal value. The BER frequency values are presented on a graphic display which provides an indication of the nominal value at an affected location from the gradient of the measured values at adjacent normal locations.

Abstract: A sheet of foldable material has four panels, separated from each other by parallel folds with a pocket for storing receipts being formed by folding the lower two panels together. The sheet has adhesive along two or more edges or on tabs projecting from the edges for sealing the folded sheet when creating the pocket. The upper and center panels have a business form such as an expense report that corresponds to the stored receipts. The form may have overlaid on it one or more detachable sheets of self-duplicating paper, such as carbon paper or "carbonless paper," for forming duplicates of the business form. When the form is complete the panels are folded over each other and sealed with adhesive strips along the sides of the sheet. The folded sheet and accompanying receipts may be mailed to the appropriate recipient or location for entry into an accounting system.