preload refers to

NCLEX-RN

NCLEX RN Exam Prep

1. What does preload refer to?

A. The volume of blood entering the left side of the heart
B. The volume of blood entering the right side of the heart
C. The pressure in the venous system that the heart must overcome to pump the blood
D. The pressure in the arterial system that the heart must overcome to pump the blood

Correct answer: B

Rationale: Preload refers to the volume of blood that enters the right side of the heart. This volume stretches the fibers in the heart before contraction. Preload is an essential factor in determining the force of ventricular contraction. Choices A, C, and D are incorrect. Choice A is incorrect because preload is specifically related to the volume of blood entering the right side of the heart. Choices C and D are incorrect as they refer to afterload, which is the pressure that the heart must overcome to pump blood out of the ventricles into the systemic or pulmonary circulation.

2. A triage nurse has four clients arrive in the emergency department within 15 minutes. Which client should the triage nurse send back to be seen first?

A. A 2-month-old infant with a history of rolling off the bed and having a bulging fontanelle with crying
B. A teenager who suffered singed facial hair while camping
C. An elderly client with complaints of frequent liquid brown-colored stools
D. A middle-aged client with intermittent pain behind the right scapula

Correct answer: B

Rationale: The correct answer is the teenager who suffered singed facial hair while camping. This client is in the greatest danger with a potential risk of respiratory distress. Singed facial hair indicates exposure to heat or fire in close range, which could have caused serious damage to the interior of the lungs. It's crucial to prioritize this client as the interior lining of the lungs has no nerve fibers, so swelling may not be immediately noticeable. The other choices, while concerning, do not present an immediate life-threatening situation. The infant's condition may be serious but does not pose an immediate danger of respiratory distress. The elderly client's symptoms could indicate gastrointestinal issues, which are important but not as urgent as potential respiratory compromise. The middle-aged client's pain behind the right scapula, while uncomfortable, does not indicate an acute life-threatening condition requiring immediate attention.

3. The mitral valve is synonymous with the term:

A. Left ventricle
B. Right atrium
C. Bicuspid valve
D. Tricuspid valve

Correct answer: C

Rationale: The mitral valve, also known as the bicuspid valve, is located between the left atrium and the left ventricle, regulating blood flow from the left atrium into the left ventricle. The term 'bicuspid' refers to the valve's two cusps or leaflets. This distinguishes it from the tricuspid valve (Choice D), which has three cusps, making Choice D incorrect. The left ventricle (Choice A) and right atrium (Choice B) are not synonymous with the mitral valve. Therefore, the correct answer is C: Bicuspid valve.

4. You have been asked to record the amount of food that the person has eaten during each meal. What kinds of words or numbers would you use to record this food intake?

A. A little, a moderate amount, or all of the meal
B. 50 cc, 100 cc, or 500 cc of the meal
C. 25%, 50%, or 100% of the meal
D. Either A or C

Correct answer: C

Rationale: Food intake is typically measured in terms of the percentage (%) of food that has been eaten. Using percentages allows for a more precise and standardized way of recording food consumption. For instance, you would record 25% of the vegetable if the person has eaten about a quarter of the vegetables on the plate. Choices A and B are incorrect. Choice A's terms 'a little' and 'a moderate amount' are vague and not specific enough for accurate documentation. Choice B's use of cc is more appropriate for measuring fluids, not solid foods. Choice D is also incorrect as it combines vague terms with percentages, which could lead to confusion in accurately documenting the food intake.

5. A 6-month-old infant has been brought to the well-child clinic for a checkup. The infant is currently sleeping. What would the nurse do first when beginning the examination?

A. Wake the infant before beginning the examination.
B. Examine the infant's hips before the infant wakes up.
C. Auscultate the lungs and heart while the infant is still sleeping.
D. Begin with the assessment of the eye and continue with the remainder of the examination in a head-to-toe approach.

Correct answer: C

Rationale: When the infant is quiet or sleeping, it is an ideal time to assess the cardiac, respiratory, and abdominal systems. It is recommended not to wake the infant unnecessarily. Auscultating the lungs and heart while the infant is still sleeping allows for a comprehensive assessment without disturbing the infant. Examining the infant's hips prematurely may disrupt the infant's sleep. Starting with an assessment of the eye is not appropriate as it is an invasive procedure and should be performed towards the end of the examination after the non-invasive assessments have been completed.