Apparatus and process for injection of a gas
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United States of America Patent
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-
Jun 27, 1995
Grant Date -
N/A
app pub date -
Mar 29, 1993
filing date -
Aug 30, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus and process for injection of a gas, preferably carbon dioxide, comprising a source of the gas connected to at least two conduits (C) each provided with a control valve (EV) and a control (Q) of the gaseous flow rate. All of the conduits (C) open into a single channel (B), provided with a three-way control valve (V). The control (Q) of the gaseous flow rate is a calibrated orifice. The control valve (EV) and three-way control valve (V) are electrovalves. The channel (B) is connected to a catheter for injection of the gas into a body. The controls (Q) each permit a different flow rate through the associated control valve (EV), whereby a range of total flow rates of gas into the channel can be achieved by opening and closing selected ones of the controls.
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