Explanation: The most accurate method for measuring respiratory rate is to count the number of complete breaths (one inhalation + one exhalation) for a full 60 seconds (1 minute). This is because the respiratory rate can be irregular, and counting for a shorter period and multiplying can amplify any error and provide an inaccurate measurement. It is a vital sign that requires a full minute of observation for precision, especially in clinical assessments.

Explanation: A Holter monitor is a portable electrocardiogram (ECG) device that continuously records the heart's rhythms over a 24 to 48-hour period while the patient goes about their daily activities. This is crucial for detecting arrhythmias or other cardiac events that may not occur during a standard, short-duration ECG. Monitoring blood pressure is typically done with an ambulatory blood pressure monitor, not a Holter monitor. Detecting digestive irregularities is not related to cardiac monitoring. Measuring oxygen levels is performed by a pulse oximeter.

Explanation: Infection control protocols in healthcare settings mandate the use of hospital-grade disinfectants on all high-touch and clinical surfaces to eliminate pathogens and prevent healthcare-associated infections (HAIs). Disposing of paper products and using a vacuum cleaner are part of general cleaning but do not achieve disinfection. Spraying air freshener only masks odors and does not kill germs.

Explanation: The fingertip, specifically the sides of the distal end of the finger, is the preferred site for capillary blood sampling in adults and children. This area has a rich capillary network, providing an adequate blood flow for tests like glucose monitoring. The thumb has a pulse and is more sensitive. The elbow is the site for venipuncture, not capillary sampling. The wrist is not a standard site for blood collection due to thinner skin and less capillary density.

Explanation: This is a straightforward calculation. The prescribed dose is 2 grams. Each vial contains 1 gram. Therefore, to obtain 2 grams, the medical assistant must prepare 2 vials (1 gram/vial * 2 vials = 2 grams). 4 vials would be 4 grams, which is an overdose. 0.5 vials would be 0.5 grams, which is an underdose. 1 vial would only provide 1 gram.