Mitsubishi Rayon Company, Limited

Hirotaka Kojima

Teruyoshi Uchida

Masaru Uehara

Hisayoshi Yamamori

Hiroshi Kitagawa

Masaaki Sato

Kiyoshi Adachi

Akihiko Ooe

Junichi Tashita

Tetsuo Imaiida

A method and apparatus for measuring a gas partial pressure in a living body on the basis of the principle of polarography. A gas partial pressure sensor includes a biomedical electrode inserted in the living body. A temperature sensor is further provided to measure a temperature of the living body. A polarographic current value measured by the gas partial pressure sensor is corrected to a current value at a reference temperature depending on the temperature measured by the temperature sensor. Then the gas partial pressure at the reference temperature is determined based on a working curve which represents a relationship between the corrected polarographic current value and the gas partial pressure at the reference temperature.

Method and apparatus for measuring gas partial pressure in living body

Disclosed is a metal electrode for a living body, which comprises a noble metal wire an an insulating covering layer formed around the periphery of the noble metal wire. At least a part of the portion of the insulating covering layer falling in contact with the noble metal wire is composed of a crosslinked epoxy resin. The outermost layer of the insulating covering layer is composed of a polyurethane. Either or both of a part of the tip end and side face of the metal electrode is directly covered with a polyurethane porous membrane instead of the insulating covering layer. The electrode is advantageous in that (a) the adhesion of a membrane to the insulating covering layer and the adhesion of the insulating covering layer to a metal wire of the electrode are excellent, (b) measurement can be stably performed for a long time, (c) a stablization time required for obtaining a stable current value at the initial stage of the measurement is short, and (d) the electrode can be handled very easily and has enhanced measurement precision and response characteristics.

Electrode for living body

Medical appliances are continuously packed for sterilization thereof by the process wherein (1) bags having micropores in peripheral side portions thereof to be sealed, which micropores allow passage of a sterilizing gas and a high pressure steam but do not allow passage of germs, are formed from packing sheets; (2) medical appliances are inserted into the bags while the bags are formed; (3) all the peripheral side portions of the bags are sealed; and (4) the sealed bags containing the packed medical appliances are separated into packages each having the packed medical appliance.

Apparatus for continuously packing medical appliances for sterilization

An electrode for living bodies consisting of a fine metal wire at least part of the surface of which is directly coated with a porous membrane having fine pores of an average pore diameter of greater than 0.01 .mu.m. The electrode makes it possible to measure the oxygen concentration in the blood vessels and in the living tissues with increased stability and improved response characteristics. Particularly good results are obtained when the porous membrane is a non-homogeneous structure using a cellulose acetate.

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Kasugai, Japan

Hirotaka Kojima