Almost half of newborns undergoing surgery to repair narrowing or interruption of the aortic arch will suffer injury to the recurrent laryngeal nerve. This causes a weak voice and can lead to problems with feeding including aspiration of milk feed after the surgery. As these children can have a vulnerable circulation, aspiration events can reduce survival and poor weight gain has been shown to correlate with poorer outcomes after surgery. In other types of surgery in the neck, monitors can be used to alert the surgeon to when injury is occurring to the recurrent nerve. To date, this type of monitoring has not been possible in newborns. This study aims to investigate if this type of monitoring is feasible in newborns undergoing aortic arch repair, to prevent recurrent nerve injury.
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Vocal cord EMG - Burst amplitude (mV)
Timeframe: Intra-operative (1 hour)
Vocal cord EMG - Burst duration (ms)
Timeframe: Intra-operative (1 hour)
Vocal cord EMG - Burst frequency (Hz)
Timeframe: Intra-operative (1 hour)
Vocal cord EMG - Interburst interval (ms)
Timeframe: Intra-operative (1 hour)
Vocal cord EMG - Signal to noise ratio (mV)
Timeframe: Intra-operative (1 hour)
Correlation of Vocal cord EMG with post-operative palsy
Timeframe: Post extubation / 1 week post-operatively