affirm怎么理解？

In the prehospital trauma patient, treatment of hemorrhagic shock and other immediate life threats should be the focus of patient management rather than placement of an advanced airway. Potentially harmful effects of endotracheal intubation and positive pressure ventilation on the trauma patient in hemorrhagic shock include reduced cardiac output, apnea, hypoxia, hypocapnia due to inadvertent hyperventilation (28, 36), and prolongation of scene times (19). Unless there is an injury leading to airway obstruction, the recommendation is for resuscitation with blood products prior to airway management (37). Studies have affirmed the incidence of hypotension (38) and cardiac arrest in hemorrhagic shock patients undergoing intubation (29). Drug-assisted airway management (DAAM) and decreases in cardiac output related to positive pressure ventilation can also contribute to hypotension in patients in hemorrhagic shock, potentially leading to peri-intubation cardiac arrest

在院前创伤患者中，失血性休克和其他直接威胁生命的治疗，而非放置高级气道，才应是患者管理的重点。气管插管和正压通气对失血性休克创伤患者的潜在有害影响包括心输出量减少、呼吸暂停、缺氧、由于无意的过度换气引起的低碳酸血症，以及现场停留时间延长。除非有导致气道阻塞的损伤，否则建议在气道管理前使用血液产品进行复苏。有研究探索了行插管的失血性休克患者中低血压和心脏骤停的发生率。药物辅助气道管理(DAAM)和正压通气相关的心输出量减少也可能导致失血性休克患者出现低血压，可能导致围插管期心脏骤停。

affirm怎么理解？