Which of the following laboratory sections performs CBC and erythrocyte sedimentation rate?

A. Stand 25 feet from the Snellen chart. The standard distance for testing visual acuity with a Snellen chart is 20 feet, not 25 feet. Testing at 25 feet would not provide accurate results.
B. Allow them to squint if necessary. Squinting can artificially improve vision, leading to inaccurate results. The patient should be instructed to avoid squinting during the test.
C. Keep both eyes open while using the occluder. The patient should use the occluder to cover one eye but keep both eyes open during the test. This ensures that each eye is tested individually without any pressure or distortion from closing the other eye.
D. Start with the bottom line of the Snellen chart and work upward. The patient should start from the top of the Snellen chart and work downward. Starting from the bottom would likely result in frustration and inaccurate assessment as the lines become increasingly difficult.

A. Place a bandage on the site after holding pressure for 1 min: While a bandage may be used, holding pressure for 1 minute is excessive. Typically, pressure is held for a shorter period to control bleeding.
B. Apply direct, firm pressure to the puncture site on the finger: Applying firm pressure helps to stop bleeding after the puncture and is the appropriate technique.
C. Warm the site for a minimum of 10 min prior to puncture. Warming the site is usually done for a few minutes (not 10) to increase blood flow, but it should be done briefly and not excessively.
D. Have the parent hold the child during the procedure: While it’s important to ensure the child is held securely, the parent should assist by holding the child gently but not to the extent that it interferes with the procedure.