Nokea
The healthcare provider is examining a patient who is reporting "feeling cold."? Which is a mechanism of heat loss in the body?
- A. Exercise
- B. Radiation
- C. Metabolism
- D. Food digestion
Correct Answer: B
Rationale: When the body needs to lose heat, one of the mechanisms it employs is radiation. Radiation involves the transfer of heat from the body to the environment in the form of infrared waves. While metabolism, exercise, and food digestion contribute to heat production, they are not mechanisms for heat loss. Metabolism generates heat as a byproduct, exercise increases metabolic rate leading to heat production, and food digestion involves some heat generation, but these processes do not directly facilitate heat loss. Therefore, in the scenario where the patient is feeling cold, radiation is the primary mechanism for the body to lose excess heat and maintain a stable internal temperature.
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The nurse is teaching a student nurse about the different types of thermometers. When teaching the student about the advantages of the tympanic membrane thermometer (TMT), which statement would the nurse include?
- A. "Measuring temperature using the TMT is cost-effective."?
- B. "The rapid measurement of the TMT is beneficial for uncooperative younger children."?
- C. "TMT is not recommended for measuring core body temperature in newborn infants."?
- D. "TMT is not the preferred method for measuring body temperature in patients with otitis media."?
Correct Answer: B
Rationale: The correct answer is "The rapid measurement of the TMT is beneficial for uncooperative younger children." TMT is ideal for young children who may not cooperate for oral temperatures or fear rectal temperatures. However, using TMT for newborn infants is not recommended due to inconsistencies in results. Measuring temperature with TMT is not necessarily cost-effective. The most accurate method for measuring core temperature is through rectal temperatures. TMT may not be the preferred method for patients with otitis media due to potential inaccuracies caused by fluid behind the tympanic membrane.
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.
A new staff nurse completes orientation to the psychiatric unit. This nurse will expect to ask an advanced practice nurse to perform which action for patients?
- A. Perform mental health assessment interviews
- B. Establish therapeutic relationships
- C. Prescribe psychotropic medications
- D. Individualize nursing care plans
Correct Answer: C
Rationale: Prescriptive privileges are granted to Master's-prepared nurse practitioners who have taken special courses on prescribing medications. The nurse prepared at the basic level performs mental health assessments, establishes relationships, and provides individualized care planning. In this scenario, the new staff nurse would ask the advanced practice nurse to prescribe psychotropic medications, as this is within their scope of practice and expertise. Establishing therapeutic relationships, performing mental health assessments, and individualizing care plans are typically responsibilities of staff nurses at the basic level, not advanced practice nurses.
When assessing a patient's pulse, which of the following characteristics would the nurse also notice?
- A. Force
- B. Pallor
- C. Capillary refill time
- D. Timing in the cardiac cycle
Correct Answer: A
Rationale: When assessing a patient's pulse, the nurse should observe characteristics such as rate, rhythm, and force. Force refers to the strength or amplitude of the pulse, which provides important information about cardiac output. Pallor is the paleness of the skin and is not directly related to pulse assessment. Capillary refill time is used to assess peripheral perfusion and is not specifically part of pulse assessment. Timing in the cardiac cycle is a broader concept and not a characteristic directly assessed during a pulse examination. Therefore, choice A, 'Force,' is the correct answer as it aligns with the standard parameters evaluated during pulse assessment.
A patient's blood pressure is 118/82 mm Hg. The patient asks the nurse, "What do the numbers mean?"? Which is the best reply by the nurse?
- A. "The numbers are within the normal range and are nothing to worry about."?
- B. "The bottom number is the diastolic pressure and reflects the pressure in the arteries when the heart relaxes."?
- C. "The top number is the systolic blood pressure and reflects the pressure of the blood against the arteries when the heart contracts."?
- D. "The concept of blood pressure can be complex. The primary thing to be concerned about is the top number, or the systolic blood pressure."?
Correct Answer: C
Rationale: The systolic pressure is the maximum pressure felt on the artery during left ventricular contraction, or systole. The diastolic pressure is the elastic recoil, or resting, pressure that the blood constantly exerts in between each contraction. The nurse should answer the patient's question in terms they can understand and not just say it is normal and there is nothing to worry about. The diastolic pressure is the pressure in the vessels when the heart is at rest, not the stroke volume. Both the systolic and diastolic blood pressure are important. Choice A is incorrect as providing a vague reassurance does not address the patient's query. Choice B is incorrect as it inaccurately describes the diastolic pressure as reflecting stroke volume, which is incorrect. Choice D is incorrect as it oversimplifies the explanation, focusing solely on the top number without providing a complete understanding of blood pressure.