References 1. Campbell D. Coronavirus: London hospital almost runs out of oxygen for Covid-19 patients. The Guardian. https://www.the guardian.com/society/2020/apr/02/london-hospital-almostruns-out-oxygen-coronavirus-patients (accessed 04/06/2021). 2. BBC News. India Covid: Delhi hospitals plead for… Click to show full abstract
References 1. Campbell D. Coronavirus: London hospital almost runs out of oxygen for Covid-19 patients. The Guardian. https://www.the guardian.com/society/2020/apr/02/london-hospital-almostruns-out-oxygen-coronavirus-patients (accessed 04/06/2021). 2. BBC News. India Covid: Delhi hospitals plead for oxygen as more patients die. https://www.bbc.co.uk/news/world-asia-ind ia-56940595 (accessed 04/06/2021). 3. MHRA Central Alerting System. Oxygen usage. https://www.cas. mhra.gov.uk/ViewandAcknowledgment/ViewAlert.aspx?Ale rtID=103020 (accessed 04/06/2021). 4. Bould MD, Bearfield P. Techniques for emergency ventilation through a needle cricothyroidotomy. Anaesthesia 2008; 63: 535–9. 5. Court MW, McAlister S, Pierce JMT, Sutton R. Converting gasdriven ventilators from oxygen to air: environmental implications.Anaesthesia 2021;76: 285–6.
               
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