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Abstract: SA-PO731

Response of Relowering Treatment and Clinical Significance in Severe Hyponatremia: A Post Hoc Analysis of the SALSA Trial

Session Information

Category: Fluid, Electrolytes, and Acid-Base Disorders

  • 1102 Fluid, Electrolyte, and Acid-Base Disorders: Clinical

Authors

  • Ahn, Junmo, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Gyeonggi, Korea (the Republic of)
  • Seo, Jang Won, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Gyeonggi, Korea (the Republic of)
  • Oh, Yun Kyu, Seoul National University Seoul Metropolitan Government Boramae Medical Center, Dongjak-gu, Seoul, Korea (the Republic of)
  • Kim, Sejoong, Seoul National University Bundang Hospital, Seongnam, Korea (the Republic of)
  • Baek, Seon Ha, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Gyeonggi, Korea (the Republic of)
Background

Relowering treatment has been performed in overly rapid correction of hyponatremia and its response may be numerous. However, few studies evaluated response of relowering therapy and its relationship to prognosis in patients with treating hyponatremia.

Methods

One hundred seventy-eight patients with glucose-corrected serum Na (sNa) ≤125 mmol/L were included. Eighty-seven out of 178 patients (in total 207 cases) underwent relowering treatment. Relowering regimen was 5% dextrose infusion of 10 ml/kg over 1hour if sNa level increase is ≥10 mmol/L or ≥18 mmol/L within 24 or 48 hours, respectively. Patients with concurrent desmopressin use or without sNa level after relowering were excluded. Eighty-seven patients (age 73.1 years, male 43.7%, and mean initial sNa 117.0 mmol/L) were classified into responder group (RG) (≥ 2 mmol/L) (34/87) and non-responder (NRG) (< 2mmol/L) (53/87) group according to decrease of sNa after relowering treatment. Overcorrection was defined as increase in the sNa level by >12/18 mmol/L within 24/48 hours.

Results

Mean of sNa at time of relowering treatment and delta sNa from initial sNa were 128.6 mmol/L and 11.7 mmol/L, respectively. Among 87 patients with relowering treatment, overcorrection occurred in 9/34 (26.5%) of RG and 27/53 (50.9%) of NRG (P = 0.024). Median value of sNa decreases by 1 mmol/L (interquartile -1 to 3 mmol/L) in total, 4 mmol/L (interquartile 3 to 6 mmol/L) in RG, 0 (interquartile -2 to 1 mmol/L) in NRG after treatment. Lower initial sNa level (adjusted odd ratio [OR] 0.86, P=0.008), lower initial potassium level (adjusted OR 0.28, P=0.003), NRG (adjusted OR 3.41, P=0.032) were associated with overcorrection.

Conclusion

Our findings indicate that a decrease in sNa levels less than 2 mmol/L following relowering therapy may predict overcorrection in hyponatremic patients treated with hypertonic saline.