Abstract: A pinch valve mechanism for a parenteral infusion system is provided which includes a spring-loaded pinch valve. The pinch valve is manually latched to its open position. A bobbin and cam mechanism includes a length of wire which contracts when a current is applied to it. The cam has two positions, one which holds the pinch valve in its open position and one which enables to pinch valve to close. When it is desired to automatically close the pinch valve, a current is applied to the wire. The contraction of the wire moves the cam from its valve open position to its alternate position, permitting the pinch valve to spring closed.

Abstract: A pulse oximeter sensor is provided in which the wrap which encloses and secures the light source and detector to the body includes a sheet of metallized material. The metallized material reflects body heat back to the body and provides opacity to interfering ambient light. The wrap may be formed in a "T" shape, with the light sensor and detector aligned with the stem of the "T", or in a disposable elongated configuration with the light sensor and detector longitudinally aligned with the wrap. The wrap is secured during use through either adhesive means or by the use of hook and loop fabric patches.