Equipment for the controlled insufflation of a fluid into a body cavity

US5047010A · kind A · utility

Assignee

• RICHARD WOLF GMBH · DE

Inventors

• Felix Ams · Remchingen, DE
• Manfred Baier · Starnberg, DE

Key dates

• Filing date: Mar 14, 1990
• Grant date: Sep 10, 1991
• Expiry date: Mar 14, 2010

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2202/00
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Equipment is disclosed for the controlled insufflation of a fluid into a body cavity through a probe inserted thereinto, particularly for insufflating gas through the conduit of an endoscope partly inserted into the body cavity. The equipment comprises a supply device for delivering the fluid and on which a selected nominal value for the pressure in the body cavity can be set and the relevant actual value of the body cavity pressure can be displayed by means of a measuring instrument. The inlet side of a circulating pump, is connected by way of a filter to the body caviy. During an operation the pump draws off fluid from the body cavity and circulates it back to the body cavity. Part of the circuit on the delivery side of the pump and part of the circuit leading to the measuring instrument have a common portion leading to the body cavity. When the pump is running, therefore, a retroactive dynamic pressure is applied to the measuring instrument. The dynamic pressure is compensated for by a partial vacuum derived from the delivery flow of the pump.