Cargando…
Effect of isotonic versus hypotonic maintenance fluid therapy on urine output, fluid balance, and electrolyte homeostasis: a crossover study in fasting adult volunteers
Background. Daily and globally, millions of adult hospitalized patients are exposed to maintenance i.v. fluid solutions supported by limited scientific evidence. In particular, it remains unclear whether fluid tonicity contributes to the recently established detrimental effects of fluid, sodium, and...
Autores principales: | , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455256/ https://www.ncbi.nlm.nih.gov/pubmed/28520883 http://dx.doi.org/10.1093/bja/aex118 |
_version_ | 1783241007092989952 |
---|---|
author | Van Regenmortel, N. De Weerdt, T. Van Craenenbroeck, A. H. Roelant, E. Verbrugghe, W. Dams, K. Malbrain, M. L. N. G. Van den Wyngaert, T. Jorens, P. G. |
author_facet | Van Regenmortel, N. De Weerdt, T. Van Craenenbroeck, A. H. Roelant, E. Verbrugghe, W. Dams, K. Malbrain, M. L. N. G. Van den Wyngaert, T. Jorens, P. G. |
author_sort | Van Regenmortel, N. |
collection | PubMed |
description | Background. Daily and globally, millions of adult hospitalized patients are exposed to maintenance i.v. fluid solutions supported by limited scientific evidence. In particular, it remains unclear whether fluid tonicity contributes to the recently established detrimental effects of fluid, sodium, and chloride overload. Methods. This crossover study consisted of two 48 h study periods, during which 12 fasting healthy adults were treated with a frequently prescribed solution (NaCl 0.9% in glucose 5% supplemented by 40 mmol litre(−1) of potassium chloride) and a premixed hypotonic fluid (NaCl 0.32% in glucose 5% containing 26 mmol litre(−1) of potassium) at a daily rate of 25 ml kg(−1) of body weight. The primary end point was cumulative urine volume; fluid balance was thus calculated. We also explored the physiological mechanisms behind our findings and assessed electrolyte concentrations. Results. After 48 h, 595 ml (95% CI: 454–735) less urine was voided with isotonic fluids than hypotonic fluids (P<0.001), or 803 ml (95% CI: 692–915) after excluding an outlier with ‘exaggerated natriuresis of hypertension’. The isotonic treatment was characterized by a significant decrease in aldosterone (P<0.001). Sodium concentrations were higher in the isotonic arm (P<0.001), but all measurements remained within the normal range. Potassium concentrations did not differ between the two solutions (P=0.45). Chloride concentrations were higher with the isotonic treatment (P<0.001), even causing hyperchloraemia. Conclusions. Even at maintenance rate, isotonic solutions caused lower urine output, characterized by decreased aldosterone concentrations indicating (unintentional) volume expansion, than hypotonic solutions and were associated with hyperchloraemia. Despite their lower sodium and potassium content, hypotonic fluids were not associated with hyponatraemia or hypokalaemia. Clinical trial registration. ClinicalTrials.gov (NCT02822898) and EudraCT (2016-001846-24). |
format | Online Article Text |
id | pubmed-5455256 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-54552562017-06-05 Effect of isotonic versus hypotonic maintenance fluid therapy on urine output, fluid balance, and electrolyte homeostasis: a crossover study in fasting adult volunteers Van Regenmortel, N. De Weerdt, T. Van Craenenbroeck, A. H. Roelant, E. Verbrugghe, W. Dams, K. Malbrain, M. L. N. G. Van den Wyngaert, T. Jorens, P. G. Br J Anaesth Clinical Practice Background. Daily and globally, millions of adult hospitalized patients are exposed to maintenance i.v. fluid solutions supported by limited scientific evidence. In particular, it remains unclear whether fluid tonicity contributes to the recently established detrimental effects of fluid, sodium, and chloride overload. Methods. This crossover study consisted of two 48 h study periods, during which 12 fasting healthy adults were treated with a frequently prescribed solution (NaCl 0.9% in glucose 5% supplemented by 40 mmol litre(−1) of potassium chloride) and a premixed hypotonic fluid (NaCl 0.32% in glucose 5% containing 26 mmol litre(−1) of potassium) at a daily rate of 25 ml kg(−1) of body weight. The primary end point was cumulative urine volume; fluid balance was thus calculated. We also explored the physiological mechanisms behind our findings and assessed electrolyte concentrations. Results. After 48 h, 595 ml (95% CI: 454–735) less urine was voided with isotonic fluids than hypotonic fluids (P<0.001), or 803 ml (95% CI: 692–915) after excluding an outlier with ‘exaggerated natriuresis of hypertension’. The isotonic treatment was characterized by a significant decrease in aldosterone (P<0.001). Sodium concentrations were higher in the isotonic arm (P<0.001), but all measurements remained within the normal range. Potassium concentrations did not differ between the two solutions (P=0.45). Chloride concentrations were higher with the isotonic treatment (P<0.001), even causing hyperchloraemia. Conclusions. Even at maintenance rate, isotonic solutions caused lower urine output, characterized by decreased aldosterone concentrations indicating (unintentional) volume expansion, than hypotonic solutions and were associated with hyperchloraemia. Despite their lower sodium and potassium content, hypotonic fluids were not associated with hyponatraemia or hypokalaemia. Clinical trial registration. ClinicalTrials.gov (NCT02822898) and EudraCT (2016-001846-24). Oxford University Press 2017-06 2017-05-16 /pmc/articles/PMC5455256/ /pubmed/28520883 http://dx.doi.org/10.1093/bja/aex118 Text en © The Author 2017. Published by Oxford University Press on behalf of the British Journal of Anaesthesia. http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
spellingShingle | Clinical Practice Van Regenmortel, N. De Weerdt, T. Van Craenenbroeck, A. H. Roelant, E. Verbrugghe, W. Dams, K. Malbrain, M. L. N. G. Van den Wyngaert, T. Jorens, P. G. Effect of isotonic versus hypotonic maintenance fluid therapy on urine output, fluid balance, and electrolyte homeostasis: a crossover study in fasting adult volunteers |
title | Effect of isotonic versus hypotonic maintenance fluid therapy on urine output, fluid balance, and electrolyte homeostasis: a crossover study in fasting adult volunteers |
title_full | Effect of isotonic versus hypotonic maintenance fluid therapy on urine output, fluid balance, and electrolyte homeostasis: a crossover study in fasting adult volunteers |
title_fullStr | Effect of isotonic versus hypotonic maintenance fluid therapy on urine output, fluid balance, and electrolyte homeostasis: a crossover study in fasting adult volunteers |
title_full_unstemmed | Effect of isotonic versus hypotonic maintenance fluid therapy on urine output, fluid balance, and electrolyte homeostasis: a crossover study in fasting adult volunteers |
title_short | Effect of isotonic versus hypotonic maintenance fluid therapy on urine output, fluid balance, and electrolyte homeostasis: a crossover study in fasting adult volunteers |
title_sort | effect of isotonic versus hypotonic maintenance fluid therapy on urine output, fluid balance, and electrolyte homeostasis: a crossover study in fasting adult volunteers |
topic | Clinical Practice |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455256/ https://www.ncbi.nlm.nih.gov/pubmed/28520883 http://dx.doi.org/10.1093/bja/aex118 |
work_keys_str_mv | AT vanregenmorteln effectofisotonicversushypotonicmaintenancefluidtherapyonurineoutputfluidbalanceandelectrolytehomeostasisacrossoverstudyinfastingadultvolunteers AT deweerdtt effectofisotonicversushypotonicmaintenancefluidtherapyonurineoutputfluidbalanceandelectrolytehomeostasisacrossoverstudyinfastingadultvolunteers AT vancraenenbroeckah effectofisotonicversushypotonicmaintenancefluidtherapyonurineoutputfluidbalanceandelectrolytehomeostasisacrossoverstudyinfastingadultvolunteers AT roelante effectofisotonicversushypotonicmaintenancefluidtherapyonurineoutputfluidbalanceandelectrolytehomeostasisacrossoverstudyinfastingadultvolunteers AT verbrugghew effectofisotonicversushypotonicmaintenancefluidtherapyonurineoutputfluidbalanceandelectrolytehomeostasisacrossoverstudyinfastingadultvolunteers AT damsk effectofisotonicversushypotonicmaintenancefluidtherapyonurineoutputfluidbalanceandelectrolytehomeostasisacrossoverstudyinfastingadultvolunteers AT malbrainmlng effectofisotonicversushypotonicmaintenancefluidtherapyonurineoutputfluidbalanceandelectrolytehomeostasisacrossoverstudyinfastingadultvolunteers AT vandenwyngaertt effectofisotonicversushypotonicmaintenancefluidtherapyonurineoutputfluidbalanceandelectrolytehomeostasisacrossoverstudyinfastingadultvolunteers AT jorenspg effectofisotonicversushypotonicmaintenancefluidtherapyonurineoutputfluidbalanceandelectrolytehomeostasisacrossoverstudyinfastingadultvolunteers |