Received: 4 December 2018
Accepted: 13 February 2019
First Online: 26 February 2019
Ethics approval and consent to participate
: Advice was sought from our local ethics service regarding the requirement for ethical approval for this project and since intravenous lidocaine is a routine part of care for these patients in our unit, this was considered to be a safety issue with no requirement for formal ethical committee review.
: Not applicable
: The authors declare that they have no competing interests.
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