A post-operative fluid restriction protocol reduces the incidence of delayed hyponatremia following trans-sphenoidal pituitary surgery.
The study assessed the effect of a postoperative fluid restriction on the incidence of delayed hyponatremia (DH) following transsphenoidal pituitary surgery (TSS). The incidence of DH in the prospective cohort was compared to that of a published retrospective cohort from our centre managed according to the standard postoperative protocol without fluid restriction.
This prospective interventional study included patients aged ≥18 years who underwent TSS for pituitary neuroendocrine tumors (PitNETs). A structured postoperative fluid restriction of ≤1.5 L/day was implemented from post-operative day 5 (POD5) to POD14, with daily intake/output monitoring. Serum sodium was measured at defined postoperative intervals. DH incidence in the prospective cohort was compared with a previously published retrospective cohort managed without fluid restriction. Patient adherence and satisfaction were assessed using a study-specific questionnaire.
The study included 78 patients with a mean(SD) age of 42.6(11.9) years. Seventy-two (92.3%) patients had macroadenomas and 35.9% of the tumors were invasive. Twelve (15.4%) patients developed early transient AVP deficiency. Eleven (14.1%) patients developed DH between POD 5-14, compared to 36% in the retrospective cohort (p = 0.001). None in the prospective cohort required readmission or prolonged hospitalization for hyponatremia and the hyponatremia resolved with further tighter fluid restriction. Seven patients developed mild asymptomatic hypernatremia/increased serum osmolarity which resolved with relaxation of fluid intake.
A structured fluid restriction protocol of ≤1.5 L/day in the post-operative period may be safe and effective in reducing the incidence of delayed hyponatremia and readmissions following transsphenoidal pituitary surgery for PitNETs in a tropical setting.
This prospective interventional study included patients aged ≥18 years who underwent TSS for pituitary neuroendocrine tumors (PitNETs). A structured postoperative fluid restriction of ≤1.5 L/day was implemented from post-operative day 5 (POD5) to POD14, with daily intake/output monitoring. Serum sodium was measured at defined postoperative intervals. DH incidence in the prospective cohort was compared with a previously published retrospective cohort managed without fluid restriction. Patient adherence and satisfaction were assessed using a study-specific questionnaire.
The study included 78 patients with a mean(SD) age of 42.6(11.9) years. Seventy-two (92.3%) patients had macroadenomas and 35.9% of the tumors were invasive. Twelve (15.4%) patients developed early transient AVP deficiency. Eleven (14.1%) patients developed DH between POD 5-14, compared to 36% in the retrospective cohort (p = 0.001). None in the prospective cohort required readmission or prolonged hospitalization for hyponatremia and the hyponatremia resolved with further tighter fluid restriction. Seven patients developed mild asymptomatic hypernatremia/increased serum osmolarity which resolved with relaxation of fluid intake.
A structured fluid restriction protocol of ≤1.5 L/day in the post-operative period may be safe and effective in reducing the incidence of delayed hyponatremia and readmissions following transsphenoidal pituitary surgery for PitNETs in a tropical setting.
Authors
Joseph Joseph, Rajan Rajan, Jose Jose, Kapoor Kapoor, Chacko Chacko, Prabhu Prabhu, Jonathan Jonathan, Nair Nair, Christudoss Christudoss, Thomas Thomas, Paul Paul, Jebasingh Jebasingh, Cherian Cherian, Asha Asha
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