Nephrology Dialysis Transplantation, Vol 12, Issue 4 733-735, Copyright © 1997 by Oxford University Press
Z Korzets, E Golan, S Ben-Chitrit, Y Smorjik, P Os and J Bernheim
BACKGROUND: Recently we observed a unique clinical phenomenon, namely,
orthostatic or postural hypoxaemia in a 72-year-old female adult polycystic
kidney disease (APKD) patient, maintained on CAPD. Extensive investigations
failed to yield a satisfactory explanation for her ambulatory hypoxaemia.
METHODS: To validate our observation, 15 dialysed patients underwent blood
gases analyses in both the supine and ambulatory positions (SpO2 and ApO2
respectively). Patients were divided into two groups: group 1 (n-7) whose
end-stage renal failure (ESRF) was due to APKD and group 2 (n-8) in whom
ESRF was due to other causes. Both haemodialysed (HD) and CAPD patients
were included. ApO2 was determined as the pO2 immediately upon standing up.
Readings in HD patients were taken at the end of the dialysis session, that
is, at the patients' dry weight. RESULTS: Respective SpO2 and ApO2 of the
two groups were 85 +/- 17.1 and 78 +/- 20.5 vs 85.8 +/- 19 and 91 +/- 21
mmHg. Delta change in pO2 defined as the mean decrease (negative value) or
mean increase (positive value) of ApO2 in relation to SpO2 was -7.85 (group
1) vs + 5.2 mmHg (group 2), P < 0.005. In group 1, six of seven patients
demonstrated a negative delta. In group 2, four of eight showed a positive
delta whilst the remaining four had no change in the delta value.
CONCLUSION: Orthostatic hypoxaemia may occur in dialysed patients whose
ESRF is due to APKD.
ORIGINAL ARTICLES
Orthostatic hypoxaemia in dialysed adult polycystic kidney disease patients
Department of Nephrology, Meir Hospital, Kfar Saba, Israel.
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