Arkouche W, Fouque D, Pacchiaudi C, Normand S, et al.
Resting metabolic rate in patients undergoing CAPD
Am Soc Nephrol
J Am Soc Nephrol (abstract)
(Sep) 7:1506 1996
Energy intake has been relatively neglected, as compared to protein intake,
in PD patients.
Arkouche et al measure resting metabolic rate by indirect calorimetry in 10
maintenance CAPD
patients with a mean age of 69. Measurements were made after an overnight
fast and at complete
physical rest. They were compared with those calculated from the Harris-
Benedict formula. They
found almost no difference between the values from indirect calorimetry and
the formula. These were
1232 and 1291 kcals, respectively. They conclude that the Harris- Benedict
method is a reasonably
accurate estimate of resting metabolic rate and therefore can be helpful in
defining patient's daily
energy requirements.
Comment: This is an important validation of the Harris-Benedict
equation in PD patients. The
findings, at first sight surprising, are consistent with recent work by Harty
et al which showed
similar values of resting metabolic rate in 12 CAPD patients and no
difference from normal controls.
The relatively high respiratory quotient of .88 after an overnight fast
detected in this study is
consistent with glucose absorption from the dialysate providing substrate for
oxidation, and is
similar to that found in Harty's study. Long-term studies describing energy
intake in PD patients
and relating it to outcome are required. (Peter G. Blake, M.D., Victoria
Hospital, London,
Ontario)
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Am Soc Nephrol
CRF by organ system :
Nutrition