Which of the following safety features are desirable on a transport ventilator? I. Battery-powered ventilators should be equipped with a "low battery" signal. II. Loss of O2 power alert should be available. III. A high inspiratory flow signal should be an available feature. IV. An alarm that indicates an inadvertent alteration of ventilation mode is needed

A. I, II only
B. II, III only
C. I, III, IV only
D. II, III, IV only


ANS: A
A. Correct response: The number and complexity of safety devices are limited by the small size of transport ventilators. A high-pressure relief valve that vents gas into the atmosphere at a preselected PIP is essential. Activation of the high-pressure limit should be signaled by a visual or audible alarm to alert the operator. An antiasphyxia valve that allows the patient to breathe from ambient air in the event of gas source failure is also desirable. Battery powered ventilators should be equipped with a "low battery" signal that indicates 1 hour of power remains. Loss of O2 power to the ventilator also should have an audible or visual alarm.
B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A

Health Professions

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