Correct Answer: A

Rationale: Abdominal respirations in infants are considered normal due to the underdeveloped intercostal muscles. Infants rely more on their abdominal muscles to facilitate breathing since their intercostal muscles are not fully matured. Therefore, abdominal respirations do not typically require further investigation. Inspiratory grunt, nasal flaring, and cyanosis are findings that warrant additional assessment as they can indicate potential respiratory distress or other underlying health issues in infants. Inspiratory grunt may suggest respiratory distress, nasal flaring can be a sign of increased work of breathing, and cyanosis indicates poor oxygenation, all of which require prompt evaluation and intervention to ensure the infant's well-being.

Correct Answer: C

Rationale: The correct answer is: "I understand the need to use those new skills."? This response indicates that the mother recognizes the importance of allowing the toddler to practice and develop new skills, supporting autonomy and exploration. Setting limits, protecting from falls, and intending to keep control go against the toddler's developmental needs. Toddlers at this stage require opportunities to explore, practice new skills, and gain independence to foster healthy development.

Correct Answer: B

Rationale: False. HCV is not spread through casual contact such as hugging, sneezing, or sharing eating utensils. The correct modes of transmission for HCV include direct contact with human blood through blood transfusions, improperly sterilized needles and syringes, needle sharing, or occasionally through sexual contact. Therefore, the statement is false, making 'False' the correct answer. Choices A, C, and D are incorrect as they do not accurately reflect the mode of transmission of HCV.

Correct Answer: B

Rationale: In a hospitalized patient on prolonged bed rest, the most likely cause of sudden onset shortness of breath and chest pain is pulmonary embolism. Pregnancy and prolonged inactivity both increase the risk of clot formation in the deep veins of the legs, known as deep vein thrombosis (DVT). These clots can dislodge and travel to the lungs, causing a pulmonary embolism. Myocardial infarction (Choice A) is less likely in a young patient without a significant history of atherosclerosis. Anxiety attacks (Choice C) may present with similar symptoms but are less likely in this context. Congestive heart failure (Choice D) is less probable given the acute onset of symptoms and absence of typical signs like peripheral edema in this case.

Correct Answer: A

Rationale: A non-rebreather mask is used for supplemental oxygen delivery for clients experiencing breathing difficulties. The non-rebreather mask includes a one-way valve that allows exhaled air to escape, preventing the rebreathing of carbon dioxide. The client inhales oxygenated air from a reservoir bag attached to the mask, providing high-concentration oxygen therapy. A non-rebreather mask can deliver FiO2 levels of up to 90%, making it an effective intervention for clients requiring high oxygen concentrations. Therefore, the statement that 'A non-rebreather can provide an FiO2 of 40%' is correct. Choices B, C, and D are incorrect because clients should breathe through their nose and mouth, the mask offers a reservoir for inhaling oxygen, and the mask should be assessed and potentially replaced if soiled or damaged, not routinely changed every 3 hours.