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Imidazoline use in sinonasal surgery.

Authors
  • Campbell, R G1
  • Nair, S2
  • Sacks, R3
  • Douglas, R G4
  • 1 North Shore Hospital, Waitemata District Health Board, Auckland, New Zealand. , (New Zealand)
  • 2 Auckland City Hospital, Auckland District Health Board, Auckland, New Zealand. , (New Zealand)
  • 3 Macquarie University and the University of Sydney, Australia. , (Australia)
  • 4 Department of Surgery, The University of Auckland, New Zealand. Electronic address: [email protected] , (New Zealand)
Type
Published Article
Journal
Medical hypotheses
Publication Date
Jun 01, 2014
Volume
82
Issue
6
Pages
706–708
Identifiers
DOI: 10.1016/j.mehy.2014.03.009
PMID: 24690300
Source
Medline
License
Unknown

Abstract

The nasal mucosa is very vascular, receiving more blood flow per cubic centimeter of tissue than does muscle, brain or liver (Drettner and Aust, 1974; [1]). This vascularity can present a major problem during sinus surgery. Surgeons routinely use topical vasoconstrictors in endoscopic sinus surgery however, the optimal regimen is not clear. Imidazoline nasal sprays are often used up to 1hour before sinonasal surgery to aid in intraoperative vasoconstriction. After the induction of anaesthesia, epinephrine-based topical and submucosal preparations are subsequently administered to further enhance vasoconstriction. Imidazolines are non-selective, partial alpha adrenoceptor agonists with a higher affinity, yet lower potency, for alpha adrenoceptors when compared to epinephrine. It is hypothesized that imidazolines block the action of epinephrine on the alpha adrenoceptors of the nasal mucosa resulting in less vasoconstriction, and a poorer intra-operative field, when compared to the use of epinephrine alone. This paper hypothesizes that preoperative imidazoline administration may adversely affect optimal intra-operative vasoconstriction.

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