Abstract
Background: Sodium deficiency in patients with an ileostomy is associated with chronic dehydration and may be difficult to detect. We aimed to investigate if the sodium concentration in a single spot urine sample may be used as a proxy for 24-hour urine sodium excretion.
Methods: In a prospective observational study with 8 patients with an ileostomy and 8 volunteers with intact intestines, we investigated the correlations and agreements between spot urine sodium concentrations and 24-hour urine sodium excretions. Spot urine samples were drawn from every micturition during 24 hours, and relevant blood samples were drawn. All participants documented their food and fluid intakes.
Results: There was a high and statistically significant correlation between 24-hour natriuresis and urine sodium concentrations in both morning spot samples (n = 8, Spearman's rho [ρ] = 0.78, P = 0.03) and midday spot samples (n = 8, ρ = 0.82, P = 0.02) in the patients with an ileostomy. The agreement between methods was fair (bias = -1.5, limits of agreement = -32.3 to 29.4). There were no statistically significant associations for evening samples or for samples from volunteers with intact intestines independently of time of day.
Conclusion: A single spot urine sodium sample obtained in the morning or midday may estimate 24-hour urine sodium excretion in patients with an ileostomy and thus help to identify sodium depletion.
| Original language | English |
|---|---|
| Journal | Journal of Parenteral and Enteral Nutrition |
| Volume | 44 |
| Issue number | 2 |
| Pages (from-to) | 246-255 |
| Number of pages | 10 |
| ISSN | 0148-6071 |
| DOIs | |
| Publication status | Published - 2020 |
Bibliographical note
© 2019 The Authors. Journal of Parenteral and Enteral Nutrition published by Wiley Periodicals, Inc. on behalf of American Society for Parenteral and Enteral Nutrition.Keywords
- Faculty of Science
- Dehydration
- Ileostomy
- Natriuresis
- Short bowel syndrome
- Water-electrolyte balance