Related Experiment Videos
Effect of posture on intraperitoneal pressure and peritoneal permeability in children
M Fischbach1, J Terzic, C Dangelser
1Nephrology Dialysis Transplantation Children's Unit, Strasbourg, France.
Insights
Patient posture significantly impacts peritoneal dialysis. The supine position increases intraperitoneal pressure and dialysis efficiency for urea, creatinine, and phosphate, reducing patient discomfort.
Area of Science:
- Nephrology
- Pediatric Nephrology
Background:
- Patient posture affects intraperitoneal pressure (IPP) and peritoneal membrane permeability.
- Understanding these effects is crucial for optimizing peritoneal dialysis (PD).
Purpose of the Study:
- To investigate the influence of supine versus upright posture on IPP and peritoneal equilibration during PD in children.
- To determine the optimal patient position for enhanced dialysis efficiency and patient comfort.
Main Methods:
- Two 90-minute peritoneal equilibration tests (PET) were conducted consecutively in six children.
- Tests were performed first in the supine position, then in the upright position, using identical dialysate volume and concentration.
- Intraperitoneal pressure (IPP) and solute transport (urea, creatinine, phosphate) were measured.
Main Results:
- IPP was significantly higher in the upright position (18.4 cm H2O) compared to the supine position (8 cm H2O), a 130% increase.
- Glucose resorption rate declined less in the upright position, but net ultrafiltration showed no significant difference.
- Peritoneal equilibration ratios for urea, creatinine, and phosphate were lower in the upright position.
Conclusions:
- The supine position is favored for peritoneal dialysis in children.
- Performing PD in a supine position enhances dialysis efficiency for key solutes and improves patient comfort.
- This finding has significant implications for PD protocol optimization in pediatric patients.
Abstract:
The posture of the patient influences both the intraperitoneal pressure (IPP) and the peritoneal permeability. We have studied the effects of the supine and the upright position in six children. Two peritoneal equilibration tests (PET) of 90-min dwell time each were performed consecutively, firstly in the supine position and then in the upright position. The same amount of dialysate was instilled (1,000 ml/m2; isotonic 1.36% dextrose) for each PET. Using the same filling volume, the IPP was significantly higher in the upright position (18.4 +/- 4.8 cm H2O) than in the supine position (8 +/- 2.4 cm H2O). The mean percentage IPP increase was 130% +/- 35%. The decline in glucose resorption rate from the dialysate during the PET was significantly lower in the upright position. Despite this greater relative loss of osmotic gradient in the upright than the supine position, no significant difference in net ultrafiltration was noted after 90 min of dwell. The peritoneal equilibration ratio during the PET was lower in the upright than the supine position for urea, creatinine, and phosphate. These results favor performing peritoneal dialysis in a supine position, both to increase dialysis efficiency and to reduce patient discomfort.