Abstract
In orthognathic surgery, maxillary (CNV2) and mandibular (CNV3) divisions of the trigeminal
nerve can be blocked successfully prior to surgery. In this study, it was hypothesized
that regional blocks (nerve block over a particular region: bilateral CNV2 and CNV3
divisions of the trigeminal nerve) would decrease the total requirement for intraoperative
anaesthetic agents and facilitate the process of hypotensive anaesthesia. Local anaesthesia
containing 1/100,000 epinephrine and 10 ml 0.5% levobupivacaine was injected into the planned incisions in 50 patients. Twenty-five
patients (group A) underwent orthognathic surgery without regional blocks and another
25 patients (group B) underwent surgery with regional blocks. The anaesthetic protocol
was the same in both groups and administered by a single anaesthesiologist. The mean
arterial pressure was recorded at several points throughout the operation, as well
as all the medications used. The blood loss and the amounts of medications administered
were lower in group B than in group A. In patients receiving regional blocks, the
amounts of fentanyl and nicardipine required were significantly lower. The use of
pre-emptive anaesthesia in orthognathic surgery may reduce the overall amounts of
medications required for hypotensive anaesthesia, facilitate the intraoperative control
of blood pressure, and decrease intraoperative blood loss.
Key words
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Article info
Publication history
Published online: January 19, 2016
Accepted:
September 16,
2015
Identification
Copyright
© 2015 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.
