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[Mechanism and therapy of hyponatremia with central origin]
K Morinaga1, H Tabuse, S Ohkawara
1Ohkawara Neurosurgical Hospital.
Insights
Hypertonic NaCl load therapy significantly shortened the duration of hyponatremia in patients with central origin, such as cerebrovascular disease or head injury. This treatment was found most effective for managing this condition.
Area of Science:
- Neurology
- Endocrinology
- Nephrology
Context:
- Hyponatremia is a common complication in patients with central nervous system disorders like cerebrovascular disease and head injury.
- Understanding the contributing factors and effective therapies for central neurogenic hyponatremia is crucial for patient outcomes.
Purpose:
- To investigate the effectiveness of different therapeutic interventions for hyponatremia originating from central causes (cerebrovascular disease, head injury).
- To compare the duration of hyponatremia under various treatment strategies, including hypertonic NaCl load, water restriction, glucose/insulin/potassium (GIK) therapy, and phenytoin administration.
Summary:
- A study involving 58 patients with central neurogenic hyponatremia compared a control group (no specific therapy) with groups receiving different treatments.
- Hypertonic NaCl load therapy resulted in a significantly shorter duration of hyponatremia (3.3 days) compared to other interventions and the control group (9.4 days).
- Hormonal and electrolyte levels were monitored, but the primary differentiator for effectiveness was the duration of hyponatremia.
Impact:
- Hypertonic NaCl load emerges as the most effective therapeutic strategy for rapidly resolving hyponatremia in patients with central origin.
- These findings provide valuable insights for clinical management of hyponatremia in neurological patients, potentially improving recovery times.
Abstract:
The effect of therapy for hyponatremia with central origin (cerebrovascular disease and head injury) was investigated in order to examine contributing factors. Out of a total of 58 subjects admitted to the hospital during the previous three years with cerebrovascular disease (49 cases), and head injuries (9 cases), hyponatremia with central origin occurred within 2 weeks. Special treatment for hyponatremia was not given in 30 of the 58 cases (control group). The group (28 cases) which underwent therapy was optionally selected in terms of the following-SIADH, natriuretic polypeptide involvement and sick cells resulting from Na-K pump disorder. These 28 cases were classified into subgroups: water restricted (7 cases), hypertonic NaCl load (9 cases), glucose/insulin/potassium (GIK) therapy (4 cases), phenytoin administration (8 cases). In all of the 58 patients, the serum sodium, potassium and osmolarity and urinary sodium and potassium were measured daily. The balance of water, sodium and potassium were calculated on hyponatremic phase. Plasma levels of such hormones as antidiuretic hormone, aldosterone and cortisol were measured on hyponatremic phase. For each group, onset day and duration of hyponatremia and lowest sodium value were investigated for the sake of comparison. No significant difference for onset day and lowest sodium value was found between each group. Duration was as follows: control group 9.4 +/- 3.3 days, water restricted 7.4 +/- 2.1 days, hypertonic NaCl load 3.3 +/- 1.4 days, GIK therapy 7.3 +/- 2.9 days and phenytoin administration 8.9 +/- 3.7 days. Hypertonic NaCl load indicated a significantly shorter duration compared with the other groups. Hypertonic NaCl load was found to be most effective for hyponatremia with central origin.(ABSTRACT TRUNCATED AT 250 WORDS)