1. U.S. Food and Drug Administration. Updated January 2006, https://www.fda.gov/regulatory-information/search-fda-guidance-documents/significant-risk-and-nonsignificant-risk-medical-device-studies. Accessed 26 Jun 2023.
2. Sigmon DF, An J. Nasogastric tube. [Updated 2022 Oct 31]. In: StatPearls [Internet]. Treasure Island: StatPearls Publishing; 2023. Available from: https://www.ncbi.nlm.nih.gov/books/NBK556063/.
3. Ahluwalia RS, Johal N, Kouriefs C, Kooiman G, Montgomery BS, Plail RO. The surgical risk of suprapubic catheter insertion and long-term sequelae. Ann R Coll Surg Engl. 2006;88(2):210–3. https://doi.org/10.1308/003588406X95101.
4. Mehta AK, Chamyal PC. Tracheostomy complications and their management. Med J Armed Forces India. 1999;55(3):197–200. https://doi.org/10.1016/S0377-1237(17)30440-9.
5. Pierre L, Pasrija D, Keenaghan M. Arterial lines. [Updated 2023 May 17]. In: StatPearls [Internet]. Treasure Island: StatPearls Publishing; 2023. Available from: https://www.ncbi.nlm.nih.gov/books/NBK499989/.