What is an opaque plate containing a ring of transparency that is placed in the condenser of the phase-contrast microscope?

Hyperventilation should generally be avoided during mechanical ventilatory support. Exceptions to this rule include:

1. Trying to calm an agitated patient. 2. Failure of other methods to reduce intracranial pressure. 3. Hypokalemia causing cardiac arrhythmias. a. 2 and 3 only b. 1 and 3 only c. 2 only d. 1 and 2 only

Which of the following represents a disadvantage to acquiring and implementing total laboratory automation?

A. Increases labeling errors B. Increases turnaround times C. Increases the need for additional full time equivalents (FTEs) D. The initial costs are very high