Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1989-02-06
1991-03-12
Pellegrino, Stephen C.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
128DIG13, 604153, 604 50, A61M 3100
Patent
active
049989146
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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Fuchs Hubert
Wiest Peter P.
Daley Kathleen A.
Pellegrino Stephen C.
Wiest Peter P.
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