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Endocrine. 2018 Oct;62(1):83-89. doi: 10.1007/s12020-018-1655-8. Epub 2018 Jul 2.

Perioperative serum cortisol levels in ACTH sufficient and ACTH deficient patients during transsphenoidal surgery of pituitary adenoma.

Author information

1
Department of Endocrinology, Skåne University Hospital, Lund, S-221 85, Sweden. phenkeborg@hotmail.com.
2
Department of Neurosurgery, Skåne University Hospital, Lund, S-221 85, Sweden.
3
Department of Endocrinology, Skåne University Hospital, Lund, S-221 85, Sweden.

Abstract

PURPOSE:

No previous study has analyzed serum cortisol levels during transsphenoidal endoscopic pituitary surgery in patients with and without hydrocortisone (HC) substitution.

METHODS:

A total of 15 patients undergoing surgery for a pituitary adenoma were studied. Those with normal ACTH function were either not given HC (n = 7) or received 50 mg intravenous HC at the start of surgery (n = 4). Patients with ACTH deficiency received intravenous HC of 100 mg in the morning before surgery (n = 4) with the additional 50 mg for an afternoon operation (n = 2). Propofol and remifentanil were used as anesthetics. Serum cortisol was measured at the start of and every 30 min during surgery.

RESULTS:

Among 7 patients with normal ACTH function without HC substitution, cortisol levels before surgery were 126-244 nmol/L, among the 4 patients undergoing surgery in the morning, whereas the 3 who underwent surgery in the afternoon had lower levels, 38-76 nmol/L. During nose/sinus surgery cortisol levels decreased to 79-139 and 24-54 nmol/L, respectively. At intrasellar manipulation a distinct rise was noted. Also, in the 4 ACTH sufficient patients receiving HC, cortisol levels decreased during nose/sinus surgery, but only with a slight increase during intrasellar surgery. In the 4 ACTH deficient patients cortisol peaked at 1914-2582 nmol/L.

CONCLUSIONS:

Patients with normal ACTH function without HC substitution had very low cortisol levels during the first part of surgery, likely suppressed by the anesthetics. After mechanical impact in the sella, a marked increase in cortisol was noted. Supraphysiological cortisol levels were achieved with our routine HC substitution, advising us to reduce the supplementation.

KEYWORDS:

Hydrocortisone; adrenal insufficiency; pituitary gland; adrenocorticotropic hormone; endoscopic transsphenoidal surgery; remifentanil

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