Exam 47: Discontinuing Ventilatory Support

While monitoring a patient being weaned by intermittent mandatory ventilation, you notice the following: total minute ventilation = 12 L/min; set (machine) minute ventilation = 5 L/min; set rate = 10/min; total rate = 20/min. What is the patient's average spontaneous V_T?

Which of the following ventilator strategies would you consider as a good alternative to T-tube trials when using a rapid weaning protocol? I. continuous positive airway pressure (CPAP) with flow-by (flow triggering) II. low-level pressure-supported ventilation (PSV) III. intermittent mandatory ventilation

Which of the following is false about the P_0.1 measure?

Successful weaning is less likely when a patient's work of breathing exceeds what level?

Ventilatory capacity is determined by all of the following except:

Which of the following weaning methods provides the best respiratory muscle strength conditioning?

Which of the following patients exhibits an acceptable ventilatory demand? A. 14/ 40 B. 12/ 48 C. 8/ 36 D. 15/ 35

Which of the following electrolyte imbalances can hinder weaning from ventilatory support? I.hypophosphatemia II.hypomagnesemia III.hypokalemia

You measure the spontaneous rate of breathing and V_T on four patients receiving ventilator support. For which one is successful weaning most likely? Breathing frequency A. 28/ 250 B. 29/ 350 C. 25/ 200 D. 35/ 300

Which of the following is FALSE about artificial tracheal airways and weaning?

Which of the following patients are at high risk for severe laryngeal edema after an endotracheal tube extubation? I.pediatric burn victim II.patient with epiglottitis III.smoke inhalation patient IV.pulmonary fibrosis patient

Common causes for weaning failure include all of the following except:

Which of the following is false about noninvasive positive-pressure ventilation (NIPPV)?

All of the following factors will increase ventilatory demand (workload) except:

A patient has an adequate ventilatory reserve if which of the following is TRUE?

When is ventilator dependence likely to occur? I.when ventilatory capacity exceeds demand II.when arterial hypoxemia is present III.when the patient is malnourished IV.when the cardiovascular system is unstable

Who should make the decisions related to terminal weaning?

Approximately what level of pressure support is required to overcome the work of breathing imposed by an 8-mm endotracheal tube in a patient with a spontaneous minute ventilation of 12 L/min?

All of the following are disadvantages of using intermittent mandatory ventilation for weaning except:

Which method of weaning may be useful to minimize auto-PEEP?