Susan Humphreys1,2, Derek Rosen1,2, Tessa Housden1,2, Julia Taylor1,2, Andreas Schibler1,2. 1. Department of Anaesthesia, Lady Cilento Children's Hospital, South Brisbane, Qld, Australia. 2. Paediatric Critical Care Research Group, Mater Research University of Queensland, South Brisbane, Qld, Australia.
Abstract
BACKGROUND: Transnasal Humidified Rapid-Insufflation Ventilatory Exchange has been shown to safely prolong the safe apnea time in well children post induction of anesthesia and is rapidly becoming a new standard for apneic oxygenation in adults. The same oxygenation technique is described as nasal high flow and can be used in infants and children at risk of apnea during anesthesia. AIM: We investigated the use of nasal high flow oxygen delivery during anesthesia in children with abnormal airways requiring tubeless airway assessment or surgery. METHODS: Data and outcomes of pediatric patients receiving nasal high flow for upper airway procedures were analyzed. Four categories were defined: (i) tubeless airway surgery, (ii) flexible bronchoscopy, (iii) expected difficult airway, and (iv) comorbidity related risk of apnea. Anesthesia was induced intravenously or with sevoflurane (4-8%) and then converted to total intravenous anesthesia aiming for spontaneous ventilation. Age appropriate nasal high flow cannulae were secured with 100% oxygen delivery at weight-related flow rates. Topicalization of the airway was achieved with lignocaine. Complication rates of desaturation requiring interruption of procedure for rescue oxygenation were recorded. RESULTS: Twenty children were analyzed with age range of 5 days to 11 years, ASA 1-4, and weight range 3-57 kg. Fifteen were induced with sevoflurane and 100% oxygen, five received total intravenous anesthesia only. All children received Optiflow™ nasal high flow and intravenous anesthesia during their procedure. Average SpO2 recorded was 96% with lowest SpO2 77%. One required rescue oxygenation. Median length of procedure was 32 min, (range 3-61). Most common indication was tubeless airway surgery but seven children had more than one indication. CONCLUSION: Nasal high flow can be used in spontaneously breathing children with abnormal airways for maintenance of oxygenation during anesthesia for tubeless airway procedures.
BACKGROUND: Transnasal Humidified Rapid-Insufflation Ventilatory Exchange has been shown to safely prolong the safe apnea time in well children post induction of anesthesia and is rapidly becoming a new standard for apneic oxygenation in adults. The same oxygenation technique is described as nasal high flow and can be used in infants and children at risk of apnea during anesthesia. AIM: We investigated the use of nasal high flow oxygen delivery during anesthesia in children with abnormal airways requiring tubeless airway assessment or surgery. METHODS: Data and outcomes of pediatric patients receiving nasal high flow for upper airway procedures were analyzed. Four categories were defined: (i) tubeless airway surgery, (ii) flexible bronchoscopy, (iii) expected difficult airway, and (iv) comorbidity related risk of apnea. Anesthesia was induced intravenously or with sevoflurane (4-8%) and then converted to total intravenous anesthesia aiming for spontaneous ventilation. Age appropriate nasal high flow cannulae were secured with 100% oxygen delivery at weight-related flow rates. Topicalization of the airway was achieved with lignocaine. Complication rates of desaturation requiring interruption of procedure for rescue oxygenation were recorded. RESULTS: Twenty children were analyzed with age range of 5 days to 11 years, ASA 1-4, and weight range 3-57 kg. Fifteen were induced with sevoflurane and 100% oxygen, five received total intravenous anesthesia only. All children received Optiflow™ nasal high flow and intravenous anesthesia during their procedure. Average SpO2 recorded was 96% with lowest SpO2 77%. One required rescue oxygenation. Median length of procedure was 32 min, (range 3-61). Most common indication was tubeless airway surgery but seven children had more than one indication. CONCLUSION: Nasal high flow can be used in spontaneously breathing children with abnormal airways for maintenance of oxygenation during anesthesia for tubeless airway procedures.
Authors: Susan Humphreys; Britta Sylvia von Ungern-Sternberg; Justin Skowno; Tara Williams; Julia Taylor; Fiona Taverner; Kristen Gibbons; Laura Burgoyne; David Sommerfield; Philip Stephens; Ben Hallett; Shyan Vijayasekaran; Nicola Slee; Hannah Burns; Marcin Sowa; Andrew Davidson; Andreas Schibler Journal: BMJ Open Date: 2019-10-14 Impact factor: 2.692