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Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas
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Hyponatremia after trans-sphenoidal surgery.

M Janneck1, T Burkhardt, R Rotermund

  • 1Clinic for Nephrology Hamburg‑Eppendorf Clinical University Hamburg‑Eppendorf, Germany - aberle@uke.de.

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|February 12, 2014
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Summary
This summary is machine-generated.

Fluid and electrolyte imbalances, particularly hyponatremia, are common after pituitary surgery. Routine sodium monitoring upon discharge is recommended to detect delayed hyponatremia, as predictors are lacking.

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Area of Science:

  • Neurosurgery
  • Endocrinology
  • Internal Medicine

Background:

  • Fluid and electrolyte imbalances are frequent complications post-pituitary surgery.
  • Hyponatremia is a common imbalance, occurring in isolated or multi-phasic patterns.
  • Literature estimates hyponatremia prevalence between 2-25% after trans-sphenoidal surgery, potentially underestimating true incidence.

Purpose of the Study:

  • To review the occurrence and management of hyponatremia following pituitary surgery.
  • To highlight the lack of predictors for post-operative electrolyte imbalances.
  • To recommend optimal monitoring and diagnostic strategies for hyponatremia.

Main Methods:

  • Literature review of hyponatremia following pituitary surgery.
  • Analysis of diagnostic criteria and differential diagnoses for symptomatic hyponatremia.
  • Evaluation of therapeutic options for hyponatremia, including SIADH management.

Main Results:

  • No association exists between pituitary tumor characteristics (size, entity) and hyponatremia development.
  • Delayed hyponatremia typically manifests 8-10 days post-surgery.
  • Symptomatic hyponatremia warrants ruling out corticotrophe pituitary insufficiency and considering SIADH in euvolemic patients.

Conclusions:

  • Routine sodium level measurement at hospital discharge is advised for early detection of delayed hyponatremia.
  • Syndrome of Inappropriate Antidiuretic Hormone secretion (SIADH) is a high probability in euvolemic patients and can be managed with fluid restriction or vaptans.
  • SIADH post-pituitary surgery is generally self-limiting, resolving within 2-5 days.