HESI Pediatrics Practice Exam

Correct Answer: A

Rationale: Obtaining a specimen for blood cultures is crucial in this situation as it helps identify the source of infection, if present, and guide appropriate treatment. This is important in a child with leukemia receiving chemotherapy to prevent potential complications and ensure timely intervention. Assessing the CBC may provide overall information on the child's condition but may not specifically identify a potential infection. Monitoring the oral temperature is important but obtaining blood cultures takes precedence in this scenario. Administering acetaminophen can help reduce fever but does not address the need to identify a possible infection source.

Correct Answer: B

Rationale: In this scenario, the child's symptoms of fever, rash, and swollen joints following an untreated sore throat two weeks ago are indicative of rheumatic fever. Rheumatic fever can develop as a complication of untreated streptococcal infections, leading to systemic inflammation and affecting various organs, including the joints. This condition manifests with symptoms such as fever, rash, and swollen joints, aligning with the child's presentation in this case. Scarlet fever typically presents with a sandpapery rash and strawberry tongue but does not involve joint inflammation. Kawasaki disease presents with fever, rash, and mucous membrane changes but does not typically involve joint swelling. Juvenile rheumatoid arthritis can cause joint swelling but is not directly linked to a recent untreated sore throat.

Correct Answer: A

Rationale: Pyloric stenosis leads to obstruction at the outlet of the stomach, causing frequent vomiting and loss of stomach acids. This results in a loss of hydrochloric acid and hydrogen ions, leading to metabolic alkalosis due to an increase in serum bicarbonate levels. Therefore, the correct answer is metabolic alkalosis. Choice B, respiratory acidosis, is incorrect as it is not typically associated with pyloric stenosis. Choice C, metabolic acidosis, is incorrect because the loss of stomach acids in pyloric stenosis leads to metabolic alkalosis, not acidosis. Choice D, respiratory alkalosis, is also incorrect as it is not the usual consequence of pyloric stenosis.

Correct Answer: C

Rationale: Bronchiolitis is a highly contagious respiratory infection commonly caused by viruses. Isolating the infant from others is crucial to prevent the spread of the infection to other vulnerable individuals, especially those with weakened immune systems. Encouraging play may not be appropriate as the infant is sick and needs rest. Limiting oral intake might be necessary if the infant is having difficulty swallowing due to respiratory distress. Placing the infant on their back for naps is a safe sleep practice but not the priority in this situation where preventing transmission of the infection is crucial.

Correct Answer: C

Rationale: In the management of acute asthma exacerbations, the first-line medication for quick relief of bronchoconstriction is a short-acting beta agonist, such as albuterol. These medications help to rapidly open up the airways, providing immediate relief to the patient. Inhaled corticosteroids are more commonly used for long-term control of asthma symptoms, while oral corticosteroids and leukotriene receptor antagonists are often reserved for more severe or chronic cases. Therefore, in a child experiencing severe asthma symptoms, the practical nurse should anticipate the administration of short-acting beta agonists as the initial intervention to provide quick relief and improve breathing.