What procedures will help Miss Cott prevent contractures of her knees?

How often should dry-pipe systems be hydrostatically tested?

A. Annually B. Biannually C. Every 5 years D. Every 7 years

In which of the following situations is pressure-controlled ventilation sometimes used?

1. When a precise PaCO2 has to be maintained (some closed-head injuries) 2. When more even distribution of ventilation is required 3. When ventilating patients with severe, refractory hypoxemia 4. When tidal volume in unstable due to leaks a. 1 and 2 only b. 3 and 4 only c. 1, 2, and 3 only d. 1, 3, and 4 only