Nursing Elites

1. When considering the concepts related to blood pressure, which statement best describes the concept of mean arterial pressure (MAP)?

• A. MAP is the pressure of the arterial pulse.
• B. MAP reflects the stroke volume of the heart.
• C. MAP is the pressure forcing blood into the tissues, averaged over the cardiac cycle.
• D. MAP is an average of the systolic and diastolic blood pressures and reflects tissue perfusion.

Correct answer: C

Rationale: Mean Arterial Pressure (MAP) is the pressure that forces blood into the tissues, averaged over the cardiac cycle. It is not the pressure of the arterial pulse (Choice A), nor does it directly reflect the stroke volume of the heart (Choice B). While MAP involves systolic and diastolic pressures, it is not simply an average of these two values as diastole lasts longer. Instead, MAP is closer to diastolic pressure plus one third of the pulse pressure. The best description of MAP is that it represents the pressure forcing blood into the tissues, averaged over the cardiac cycle.

2. A nurse is preparing to change a client's dressing for a burn wound on his foot. Which of the following interventions is appropriate for this process?

• A. Wash the wound with cleanser, rinse, and pat dry
• B. Bind the wound tightly, secure with tape, and elevate the foot
• C. Contact the physician after the dressing change is complete
• D. Provide analgesics for the client after the procedure

Correct answer: A

Rationale: When changing the dressing for a burn wound, it is essential to follow appropriate interventions to prevent infection, reduce pain, and support healing. In this scenario, after removing the old dressing, it is crucial to wash the wound gently with a suitable cleanser, rinse the area thoroughly, and then pat it dry. This process helps in maintaining cleanliness, reducing the risk of infection, and providing a conducive environment for healing. Binding the wound tightly (Choice B) can impede circulation and delay healing. Contacting the physician after the dressing change (Choice C) may be necessary in specific situations but is not a standard step in routine dressing changes. Providing analgesics after the procedure (Choice D) is important for pain management but is not directly related to the dressing change itself.

3. A 4-month-old child is at the clinic for a well-baby checkup and immunizations. Which of these actions is most appropriate when the nurse is assessing an infant's vital signs?

• A. The infant's radial pulse should be palpated, and the nurse should notice any fluctuations resulting from activity or exercise.
• B. The nurse should auscultate an apical rate for 1 minute and then assess for any normal irregularities, such as sinus dysrhythmia.
• C. The infant's blood pressure should be assessed by using a stethoscope with a large diaphragm piece to hear the soft muffled Korotkoff sounds.
• D. The infant's chest should be observed and the respiratory rate counted for 1 minute; the respiratory pattern may vary significantly.

Correct answer: B

Rationale: The nurse auscultates an apical rate, not a radial pulse, with infants and toddlers. The pulse should be counted by listening to the heart for 1 full minute to account for normal irregularities, such as sinus dysrhythmia. Children younger than 3 years of age have such small arm vessels; consequently, hearing Korotkoff sounds with a stethoscope is difficult. The nurse should use either an electronic blood pressure device that uses oscillometry or a Doppler ultrasound device to amplify the sounds. An infant's respiratory rate should be assessed by observing the infant's abdomen, not chest, because an infant's respirations are normally more diaphragmatic than thoracic. The nurse should auscultate an apical heart rate, not palpate a radial pulse, with infants and toddlers.

4. Digestion, elimination, and ___________ are the three functions of the digestive system.

• A. constriction
• B. relaxation
• C. absorption
• D. peristalsis

Correct answer: C

Rationale: The correct answer is 'absorption.' The three main functions of the digestive system are digestion, absorption, and elimination. Absorption refers to the process of absorbing nutrients and other substances from the digested food into the bloodstream. Choices A, B, and D are incorrect: Constriction is not a primary function of the digestive system, relaxation is not a distinct function in this context, and peristalsis is a muscular movement that aids in digestion but is not one of the three main functions of the digestive system.

5. To which of the following do the CDC Standard precautions recommendations apply?

• A. Patients with diagnosed infections only
• B. Blood or body fluids with visible blood only
• C. All body fluids including sweat
• D. All patients receiving care in hospitals

Correct answer: D

Rationale: The correct answer is 'All patients receiving care in hospitals.' Standard precautions apply to all patients in healthcare settings, regardless of their infection status. These recommendations include all body fluids except sweat, non-intact skin, and mucous membranes. Choice A is incorrect as standard precautions are not limited to patients with diagnosed infections. Choice B is incorrect as standard precautions extend beyond blood or body fluids with visible blood. Choice C is incorrect as sweat is an exception to the body fluids covered under standard precautions.

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