No realizar radiografía de tórax en menores de 40 años con bajo riesgo anestésico (ASA I o II).

Joo HS, Wong J, Naik VN, Savoldelli GL. The value of screening preoperative Chest X-rays: a systematic review. Can J Anaesth 2005;52(6):568-574.

López Argumedo M, Asua J. Preoperative Evaluation in elective surgery. (INAHTA Synthesis Report). Vitoria-Gasteiz. Dpto of Health Basque Government. Basque Office of Health Technology Assessment, Osteba 1999.

The use of routine preoperative test for elective Surgery. June 2003 NICE Clinical Guideline Nº3 (CG3). Update in 2016 Clinical Guideline (CG45).