10The tripod sign used to describe the classic position of a person desperate for more air:
11Tripod position (5) is a red flag indicating severe inflammation and impending upper airway obstruction. The tripod sign is a term used to describe the classic position of a person desperatefor more air: the patient leans forward on outstretched arms to open the airway by moving theinflamed and swollen epiglottic structures forward. This position tends to ease the patient's upperairway obstruction and relieves the choking sensation, which is aggravated by sitting back or lying flat.
37Severity of gas exchange defect PaO2/FiO2 FO2PaO2Severity of gas exchange defectPaO2/FiO2PaO2/FiO2> ~ shunt <20%Spontaneous resp_increase FiO2PaO2/FiO2 = ~ shunt >20%Need IPPV especially in CVS,CNS patientsPaO2/FiO2 <150 ~ shunt >30%IPPV+ SPECIAL CARE