each small square on the ekg paper is

NCLEX-RN

NCLEX RN Predictor Exam

1. Each small square on the EKG paper is:

A. 0.04 seconds long and 5mm tall
B. 0.2 seconds long and 5mm tall
C. 0.04 seconds long and 20mm tall
D. 0.04 seconds long and 1mm tall

Correct answer: D

Rationale: Each small square on an EKG paper represents 0.04 seconds long and 1mm tall. This standardization is essential for accurate measurements. One large square on EKG paper consists of 5 small squares in length and 5 small squares in height, which equals 0.2 seconds long and 5mm tall (0.5 mV). Choice A is incorrect because while the duration is correct, the height mentioned is not accurate. Choice B is incorrect as it provides the correct height but the duration is inaccurate. Choice C is incorrect as the height mentioned is exaggerated, and the duration is correct but the height is not. Therefore, the correct answer is 0.04 seconds long and 1mm tall.

2. When a sequence of repeated weights is necessary, the healthcare provider should aim to weigh the patient at the same time of day and with consistent clothing. Using a standardized balance or electronic standing scale is recommended for accurate measurements. The patient should remove shoes and heavy outer clothing. It is not required for the patient to always be weighed in undergarments. What is the most appropriate indicator of the patient's overall well-being?

A. General health
B. Genetic makeup
C. Nutritional status
D. Activity and exercise patterns

Correct answer: A

Rationale: Weight measurements are essential to assess general health, particularly in monitoring growth patterns. Height and weight recordings are crucial indicators of overall well-being, reflecting the individual's health status. Genetic makeup does not change with weight fluctuations, making it an inappropriate indicator. Nutritional status and activity levels can influence weight but are not as comprehensive as general health in reflecting overall well-being.

3. A 1-month-old infant has a head measurement of 34 cm and a chest circumference of 32 cm. Based on the interpretation of these findings, what action would the nurse take?

A. Refer the infant to a physician for further evaluation.
B. Consider these findings normal for a 1-month-old infant.
C. Expect the chest circumference to be greater than the head circumference.
D. Ask the parent to return in 2 weeks to re-evaluate the head and chest circumferences.

Correct answer: B

Rationale: In infants, a normal head measurement is approximately 32 to 38 cm, and it is usually around 2 cm larger than the chest circumference. These measurements vary with age; between 6 months and 2 years, both measurements are approximately the same, and after age 2 years, the chest circumference becomes greater than the head circumference. Given that the 1-month-old infant's head measurement is within the typical range and slightly larger than the chest circumference, the nurse should consider these findings normal. There is no indication to refer the infant for further evaluation or to have the parent return for re-evaluation in 2 weeks, as these measurements fall within the expected parameters for a 1-month-old infant.

4. A healthcare professional is preparing to administer a dose of platelets to a client. Which of the following actions must the healthcare professional perform before giving the platelets?

A. Start an IV of 0.9% Normal Saline to administer with the platelets
B. Ensure the container with the platelets is intact and not damaged
C. Verify the client's identity using two unique identifiers
D. Check the client's chart to ensure no contraindications to platelet transfusion

Correct answer: B

Rationale: Before administering platelets, it is crucial to check the integrity of the container holding the blood product. An intact container ensures the sterility and safety of the platelets, minimizing the risk of contamination or infection. Option A is incorrect as administering platelets typically does not require starting a new IV line unless indicated for the specific patient. Option C is not the priority as verifying the client's identity can be done at any point during the administration process but is not specific to the platelet transfusion itself. Option D, checking the client's chart for antibiotic use, is not directly related to ensuring the safety of the blood product container.

5. Who is legally able to make decisions for the patient or resident during a patient care conference when the patient is not mentally able to make decisions on their own?

A. The patient or their healthcare proxy
B. Only the patient
C. Only the healthcare proxy
D. The doctor

Correct answer: C

Rationale: When a patient is unable to make decisions due to mental incapacity, the healthcare proxy, designated by the patient in advance, has the legal authority to make decisions on the patient's behalf. In this situation, the patient lacks the capacity to make decisions independently. The healthcare proxy's role is to represent the patient's wishes and best interests. The doctor's role in a patient care conference is to provide medical expertise, offer recommendations, and assist in the decision-making process, but the final decision-making authority lies with the healthcare proxy, not the doctor.