ARTERIAL OXYGEN SATURATION DURING INDUCTION OF ANAESTHESIA AND LARYNGEAL MASK INSERTION: PROSPECTIVE EVALUATION OF FOUR TECHNIQUES

In a prospective, randomized study of 87 patients, we have compared the incidence of hypoxaemia during induction of anaesthesia with subsequent Laryngeal Mask Airway (LMA) insertion in healthy adults when four different techniques were used: one without supplementary oxygen, and three with supplemen...

Full description

Saved in:
Bibliographic Details
Published in:British journal of anaesthesia : BJA 1992-05, Vol.68 (5), p.519-522
Main Authors: HAYNES, S.R., ALLSOP, J.R., GILLIES, G.W.A.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Anaesthetic techniques: induction
Anesthesia
Anesthesia, General - methods
Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy
Biological and medical sciences
Complications: hypoxaemia
Equipment: laryngeal mask airway
Evaluation Studies as Topic
Female
General anesthesia. Technics. Complications. Neuromuscular blocking. Premedication. Surgical preparation. Sedation
Humans
Hypoxia - etiology
Intubation, Intratracheal - adverse effects
Intubation, Intratracheal - instrumentation
Intubation, Intratracheal - methods
Male
Medical sciences
Middle Aged
Oxygen - administration & dosage
Oxygen: supplementation
Positive-Pressure Respiration
Prospective Studies
Random Allocation
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In a prospective, randomized study of 87 patients, we have compared the incidence of hypoxaemia during induction of anaesthesia with subsequent Laryngeal Mask Airway (LMA) insertion in healthy adults when four different techniques were used: one without supplementary oxygen, and three with supplementary oxygen. Twelve patients did not receive supplementary oxygen before LMA placement, 25 underwent partial denitrogenation by breathing oxygen from the start of injection of the induction agent, 25 underwent formal denitrogenation by breathing oxygen for 3 min, and 25 received five tidal volume breaths of oxygen by face mask using positive pressure immediately after induction of anaesthesia. Anaesthesia was induced with propofol 2.0 mg kg−1 and fentanyl 1 μ kg−1. Additional propofol was given if required. Arterial oxygen saturation was measured by pulse oximetry. Desaturation occurred in 11 of 12 patients who did not receive supplementary oxygen, and in 19 of 25 patients who received manual ventilation with 100% oxygen after induction of anaesthesia before LMA insertion. Full denitrogenation and partial denitrogenation were equally successful in preventing desaturation. Failure to position the LMA successfully occurred in 3% of patients, and some difficulty was encountered in another 18%
ISSN:0007-0912
1471-6771
DOI:10.1093/bja/68.5.519