Surgery – Means for introducing or removing material from body for... – Gas application
Patent
1992-11-30
1994-07-12
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Gas application
604 26, 604 66, 604 67, 604 65, A61M 3700
Patent
active
053284585
ABSTRACT:
An insufflation apparatus intended to insufflate gas supplied from a gas supply source into a cavity of the human body through a gas insufflating pipe, comprising a switch valve for opening and closing a gas supply pipe extending from the gas supply source to the gas insufflating pipe, a cavity pressure measuring unit arranged in the gas supply pipe to measure the pressure in the body cavity, a pressure setting section for setting an intended pressure in the body cavity, an arithmetic unit for calculating the difference of a value measured by the cavity pressure measuring unit relative to the value of pressure set by the pressure setting section, and a changeover control unit for changing over the timings at which the switch valve is opened and closed on the basis of values thus calculated by the arithmetic unit.
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patent: 4023562 (1977-05-01), Hynecek et al.
patent: 4207887 (1980-06-01), Hiltebrandt et al.
patent: 4464169 (1984-08-01), Semm
patent: 4971034 (1990-11-01), Doi et al.
patent: 5152745 (1992-10-01), Steiner et al.
patent: 5209721 (1993-05-01), Wilk
Bito Shiro
Noda Kenji
Sekino Naomi
Takahashi Kazuhiro
Tanikawa Kouji
Gring N. Kent
Olympus Optical Co,. Ltd.
Rosenbaum C. Fred
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