Research Article Improved plastic endotracheal tubes. Br Med J 1968; 2 doi: https://doi.org/10.1136/bmj.2.5598.171 (Published 20 April 1968) Cite this as: Br Med J 1968;2:171 Article Related content Metrics Responses Peer review Related articles Correction Corrections Published: 26 April 1969; Br Med J 2 doi:10.1136/bmj.2.5651.260 See more Cardiac arrest occurs in three in 10 000 surgeries involving anaesthesia, audit finds BMJ November 20, 2023, 383 p2737; DOI: https://doi.org/10.1136/bmj.p2737 Anaesthesia associates: Royal college convenes extraordinary meeting after call from members BMJ September 11, 2023, 382 p2076; DOI: https://doi.org/10.1136/bmj.p2076 Ethnic inequalities in how care is given, not just in access and outcomes BMJ July 11, 2023, 382 p1589; DOI: https://doi.org/10.1136/bmj.p1589 Learning from complaints during covid-19: discuss risks and benefits before hospital treatment BMJ July 27, 2022, 378 o1858; DOI: https://doi.org/10.1136/bmj.o1858 Sixty seconds on . . . “The Gasman’s Shanty” BMJ October 21, 2021, 375 n2576; DOI: https://doi.org/10.1136/bmj.n2576