Presión intraperitoneal y ultrafiltración conseguida con diferentes volúmenes intraperitoneales

Abstract

Under physiological conditions the abdomen acts as a closed cavity whose pressure increases proportionally to the volume contained.
The normal value of intraperitoneal hydrostatic pressure is around 0 and in peritoneal dialysis patients with intraperitoneal volumes of 2 liters can be around 12 ± 2 cmH2O.
A quantitative, descriptive, longitudinal, and prospective multicentric study was conducted with 42 patients on a peritoneal dialysis program to examine intraperitoneal pressure and ultrafiltration achieved by infusing different volumes of dialysis fluid. Two consecutive exchanges were made: the first with 2500 ml and the second with 1500 ml; both with dialysis fluid with glucose 2.3% and permanence of 120 minutes in each exchange.
Of the 42 patients, 71.5% were men, with a mean age of 59.31 ± 12.23 years and a body mass index of 27.01 ± 4.46. The intraperitoneal pressure with intraperitoneal volume 0 was 8.2 ± 4.1; with the intraperitoneal volume of 2500 ml the pressure was 13.8 ± 4.4 and the ultrafiltration of 131 ± 206; with the intraperitoneal volume of 1500 ml the pressure was 11.2 ± 4.2 and the ultrafiltration of 192 ± 145.
Ultrafiltration with respect to infusion was 5.2% ±8.2% with a volume of 2500 ml and of 12.8% ±9.6% with a volume of 1500 ml. We can describe an increase in intraperitoneal pressure by increasing the intraperitoneal volume; at the same time we have observed a higher ultrafiltration with lower volumes which, in turn, implied lower values of pressure.