Thus, clinical signs, such as chest excursion, auscultation of lungs and oer the epigastrium, and direct laryngoscopy should be used as important confirmatory adjuncts.

• 因此，临床征象如胸廓移位、肺部和上腹部听诊，直接喉镜检查应该如同CO2确认设备一样重要的使用。