Procedure for the perfusion of cavities in objects and device for executing the procedure
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United States of America Patent
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Mar 12, 1991
Grant Date -
N/A
app pub date -
Feb 6, 1989
filing date -
Feb 17, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a procedure for the perfusion of body cavities with a fluid led from a dispenser reservoir 3 via a perfusion line 10 and a medical instrument 6. Pump 4 is connected with the perfusion line 10, a pressure sensor 5 is connected between pump 4 and medical instrument 6 to perfusion line 10, and an adjustment and measurement electronic system 12 is connected to pressure sensor 5 and pump 4. To build up, maintain, and measure as precisely as possible a preselected and precisely determined pressure in the body cavity, according to the invention the adjustment and measurement electronic system 12 determines the actual pressure in body cavity 1 by evaluating the pressure P.sub.IST measured by pressure sensor 5, the volume flow V supplied by pump 4, and the conductance G of the perfusion line 9 between pressure sensor 5 and instrument 6 and conductance G of instrument 6, and the pressure P.sub.SOLL in body cavity 1 is maintained constant at preset level P.sub.SOLL by continuous adjustment of the output of pump 4 with due consideration for conductance G.
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