Abstract: A disposable laparoscopic smoke evacuation system. The system utilizes a small fan unit and filter housed in a single disposable housing adapted to be connected between two laparoscopic surgical instrument assemblies via tubing and powered by batteries or available AC power.

Abstract: An improved expendable oxygen sensor particularly useful for measuring the dissolved oxygen content of an aluminum killed, high silicon steel bath is disclosed. The device has the typical closed end tube of solid electrolyte containing oxygen reference material, but differs from previous sensors in that a shield is provided which protects the solid electrolyte from being in contact with the bath until the solid electrolyte has had a chance to heat up more closely to the temperature of the steel. This shield, in one form, consists of a closed end tube positioned to surround the solid electrolyte and spaced from the solid electrolyte in order to prevent erroneous outputs from the sensor due to oxidation of the shield material.