The nurse tells a patient that he will be performing a visual acuity test using the Snellen eye chart. The patient asks how the test is done. The nurse's best reply is:

A. A dialysis shunt requires careful monitoring to avoid damaging the shunt, and blood pressure cuffs should not be applied to the arm with a shunt.
B. A hand amputation does not affect the use of the blood pressure cuff, but care should be taken with the affected area.
C. A previous mastectomy increases the risk of lymphedema, and using a blood pressure cuff on the affected arm could exacerbate this.
D. A patent IV line is not a contraindication for blood pressure measurement, but the nurse should take care not to interfere with the IV.

A. Kussmaul's respirations are rapid, deep, and labored breaths often seen in metabolic acidosis, which does not match the pattern described.
B. Cheyne-Stokes respirations are characterized by a pattern of deep and fast breathing followed by periods of apnea. This pattern is seen in patients with severe conditions like heart failure or brain injury.
C. Biot's respirations are irregular, but the cycle does not have a distinct pattern of fast, slow, and apnea periods.
D. Hyperventilation refers to an increased rate of breathing but does not involve the cycles of deep, slow, and apneic phases characteristic of Cheyne-Stokes.