ArticleCureus2025
Impact of Nephrology Consultation on Moderate and Severe Hyponatremia Outcomes and Length of Hospital Stay.
Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
Background Hyponatremia is a frequent electrolyte disorder among hospitalized patients, associated with increased morbidity, mortality, and healthcare costs. Timely nephrology consultation may influence patient outcomes, but its impact remains unclear. Objective To evaluate the association of early versus late or no nephrology consultation on clinical outcomes, including mortality, length of stay, sodium correction rates, and readmission among hospitalized patients with moderate to severe hyponatremia. Methods We conducted a retrospective cohort study of 423 adult patients admitted with serum sodium <130 mmol/L at New York-Presbyterian Queens from July 2023 to June 2024. Patients were categorized into early consultation (≤48 hours), late consultation (>48 hours), or no nephrology consultation groups. Primary outcomes included inpatient, 30-day, and 90-day mortality, and length of hospital stay. Secondary outcomes comprised readmission rates, discharge disposition, recurrence of hyponatremia, and neurological complications, including osmotic demyelination syndrome. Multivariable regression adjusted for confounders such as age, comorbidities, and admission unit. Results Early nephrology consultation was provided to 41% of patients, late consultation to 20%, and 39% received no consultation. Mortality rates did not differ significantly among groups at any time point. Nephrology consultation was associated with a longer hospital stay (median 7-8 days vs. 5 days; p<0.001) but did not significantly affect sodium correction rates or readmission. No cases of osmotic demyelination syndrome were observed. Causes of death were predominantly cancer, infection, and cardiorespiratory events. Multivariable analysis confirmed no significant mortality difference attributable to consultation timing but a significant increase in length of stay with nephrology involvement. Conclusion In patients with moderate to severe hyponatremia, nephrology consultation was associated with longer hospitalization but did not significantly alter mortality or readmission rates. Further prospective studies are needed to clarify the role of nephrology input in optimizing outcomes and resource utilization in hyponatremic patients.
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