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. Over a patient's lifespan, how does the pulse rate change?

A. starts out fast and decreases as the patient ages.
B. starts out slower and increases as the patient ages.
C. varies from slow to fast throughout the lifespan.
D. stays consistent from birth to death.

Correct answer: A

Rationale: The correct answer is that the pulse rate starts out fast and decreases as the patient ages. In infants, the normal pulse rate is around 140 beats per minute, which then falls to an average of 80 beats per minute in adults. As individuals age, their pulse rate tends to decrease due to changes in cardiovascular function. Choice B is incorrect as the pulse rate typically decreases with age, rather than increases. Choice C is incorrect as there is a general trend of decreasing pulse rate as individuals age, rather than a continuous variation. Choice D is incorrect as the pulse rate does change over a patient's lifespan, starting fast in infants and decreasing as they age.

3. The nurse is reviewing concepts related to one's heritage and beliefs. Which concept refers to an organized system of beliefs concerning the cause, nature, and purpose of the universe?

A. Culture
B. Religion
C. Ethnicity
D. Spirituality

Correct answer: B

Rationale: Religion refers to an organized system of beliefs concerning the cause, nature, and purpose of the universe, as well as the attendance of regular services. Religion is a shared experience of spirituality or the values, beliefs, and practices into which people are either born or that they may adopt to meet their personal spiritual needs through communal actions, such as religious affiliation, attendance and participation in a religious institution, prayer, or meditation, and religious practices. Culture is a complex phenomenon that includes attitudes, beliefs, self-definitions, norms, roles, and values learned from birth through the processes of language acquisition and socialization. It does not refer to a belief in a divine or superhuman power. Ethnicity pertains to a social group within the social system that claims to possess variable traits, such as a common geographic origin, religion, race, and others. Spirituality is a broad term focused on a connection with something bigger than oneself and a belief in transcendence.

4. A patient has suddenly developed shortness of breath and appears to be in significant respiratory distress. After calling the physician and placing the patient on oxygen, which of these actions is the best for the nurse to take when further assessing the patient?

A. Count the patient's respirations.
B. Bilaterally percuss the thorax, noting any differences in percussion tones.
C. Call for a chest x-ray and wait for the results before beginning an assessment.
D. Inspect the thorax for any new masses and bleeding associated with respirations.

Correct answer: B

Rationale: In a situation where a patient is in significant respiratory distress, bilaterally percussing the thorax to note any differences in percussion tones is a crucial nursing intervention. Percussion provides instant feedback regarding changes in underlying tissue density, which can give important clues about the patient's physical status. This hands-on assessment technique is readily available and can be performed promptly. Counting the patient's respirations, while important, may not provide as much detailed information as percussion. Ordering a chest x-ray and waiting for the results can cause a delay in assessing and addressing the patient's immediate needs. Inspecting the thorax for new masses and bleeding, although relevant, may not offer as much real-time information about the patient's condition compared to percussion.

5. When measuring the vital signs of a 6-month-old infant, which action by the nurse is correct?

A. Respirations are measured first, followed by pulse and temperature.
B. Vital signs should be measured as frequently as in an adult.
C. Procedures are explained to the parent, and the infant is encouraged to handle the equipment.
D. The nurse should first measure the infant's vital signs before performing a physical examination.

Correct answer: A

Rationale: When assessing vital signs in a 6-month-old infant, the correct order is to measure respirations first, followed by pulse and temperature. This sequence is important to avoid potential alterations in respiratory and pulse rates caused by factors like crying or discomfort. Measuring the temperature first, especially rectally, may lead to an increase in respiratory and pulse rates, which can skew the results. It is crucial to follow this specific order to obtain accurate baseline values. Therefore, option A is the correct choice. Option B is incorrect as the frequency of measuring vital signs in infants differs based on individual needs rather than being consistently more frequent than in adults. Option C is not directly related to the correct sequence for measuring vital signs in infants. Option D is incorrect because the physical examination typically follows the assessment of vital signs in clinical practice.