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. The patient with migraine headaches has a seizure. After the seizure, which action can you delegate to the nursing assistant?

A. Document the seizure
B. Perform neurologic checks
C. Take the patient's vital signs
D. Restrain the patient for protection

Correct answer: C

Rationale: After a patient with migraine headaches has a seizure, it is important to assess their vital signs to monitor their condition. This task can be safely delegated to a nursing assistant as it falls within their scope of practice. Documenting the seizure and performing neurologic checks require a higher level of training and should be done by a nurse or healthcare provider. Restraint should never be used as a first-line intervention after a seizure unless there is an immediate threat to the patient's safety, and it should be done following proper protocols and with appropriate training.

3. During auscultation of a patient's heart sounds, the nurse hears an unfamiliar sound. Which action would the nurse take?

A. Ask the patient how he or she is feeling.
B. Document the findings in the patient's record.
C. Wait 10 minutes and auscultate the sound again.
D. Ask another nurse to double-check the finding.

Correct answer: D

Rationale: When encountering an unfamiliar sound during auscultation, it is crucial for the nurse to seek confirmation from another healthcare professional. Asking the patient about their feelings may not provide insight into the unfamiliar sound. Simply documenting the findings without verification may lead to errors in interpretation. Waiting and auscultating again after 10 minutes might delay necessary intervention. Consulting another nurse for a second opinion ensures accurate identification of the unfamiliar sound and appropriate follow-up actions.

4. You are taking care of a patient who has active TB. The patient has been put on airborne precautions and is in a special room. You must wear a HEPA mask when you enter the room. Now, the patient has to leave the room and go to the radiology department. How can you transport this patient to the radiology department without spreading TB throughout the hospital?

A. Have everyone along the route to the radiology department wear a HEPA mask.
B. Have patients along the route to the radiology department wear a HEPA mask.
C. Have staff along the route to the radiology department wear a HEPA mask.
D. Place a HEPA mask on the patient.

Correct answer: D

Rationale: To prevent the spread of TB throughout the hospital, it is essential to place a HEPA mask on the patient before transporting them to the radiology department. Expecting everyone along the route to wear a HEPA mask is not practical due to the high cost and the need for special fittings. Having patients or staff wear HEPA masks along the route is also not feasible and may not effectively contain the spread of TB.

5. Which body plane divides the body into right and left sides?

A. Frontal Plane
B. Medial Plane
C. Median Plane
D. Transverse Plane

Correct answer: C

Rationale: The correct answer is the Median Plane, also known as the sagittal plane. It divides the body into right and left sides. The Frontal Plane, or coronal plane, divides the body into front and back sections. The Transverse Plane divides the body into superior (upper) and inferior (lower) sections. Therefore, choices A, B, and D are incorrect as they do not specifically divide the body into right and left sides.