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What is the most common cause of a pulmonary embolus?
- A. An amniotic fluid embolus.
- B. A deep vein thrombosis from lower extremities.
- C. A fat embolus from a long bone fracture.
- D. Vegetation that dislodges from an infected central venous catheter.
Correct Answer: B
Rationale: The correct answer is B: A deep vein thrombosis from lower extremities. Deep vein thrombosis (DVT) is the most common cause of a pulmonary embolus as a blood clot can dislodge from the veins, travel to the lungs, and block blood flow. An amniotic fluid embolus (Choice A) occurs during childbirth and is rare as a cause of pulmonary embolism. A fat embolus (Choice C) typically occurs after a long bone fracture and is more likely to cause issues in the lungs. Vegetation from an infected central venous catheter (Choice D) can cause septic pulmonary embolism, but it is not as common as DVT.
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The American Nurses Credential Center Magnet Recognition Program supports many actions to ensure that nurses are engaged and empowered to participate in ethical decision making. Which of the following would assist nurses in being involvabeirdb .icnom r/etesset arch studies?
- A. Education on protection of human subjects
- B. Participation of staff nurses on ethics committees
- C. Written descriptions of how nurses participate in ethic s programs
- D. Written policies and procedures related to response to ethical issues
Correct Answer: A
Rationale: Rationale:
A: Education on protection of human subjects is crucial for nurses to understand ethical principles when conducting research studies. It ensures compliance with ethical guidelines and protection of research participants.
B: Participation of staff nurses on ethics committees is not directly related to conducting research studies and may not specifically involve protection of human subjects.
C: Written descriptions of how nurses participate in ethics programs do not necessarily focus on research studies and may not cover the specific ethical considerations required in research.
D: Written policies and procedures related to response to ethical issues are important but may not provide the necessary knowledge on protection of human subjects for conducting research studies.
When performing an initial pulmonary artery occlusion pr essure (PAOP), what are the best nursing actions? (Select all that apply.)
- A. Inflate the balloon for no more than 8 to 10 seconds w hile noting the waveform change.
- B. Inflate the balloon with air, recording the volume nece ssary to obtain a reading.
- C. Maintain the balloon in the inflated position for 8 hours following insertion.
- D. Zero reference and level the air-fluid interface of the tr ansducer at the level of the phlebostatic axis.
Correct Answer: A
Rationale: The correct answer is A: Inflate the balloon for no more than 8 to 10 seconds while noting the waveform change. This is because inflating the balloon within this time frame allows for accurate measurement of PAOP without causing complications like pulmonary edema. Noting the waveform change helps in determining the accurate pressure reading.
Explanation of why other choices are incorrect:
B: Inflating the balloon with air and recording the volume necessary is not a recommended practice as it can lead to inaccurate readings and potential harm to the patient.
C: Maintaining the balloon inflated for 8 hours following insertion is unnecessary and could lead to complications such as vascular damage or thrombosis.
D: Zero referencing and leveling the transducer at the phlebostatic axis are important steps but not directly related to performing an initial PAOP measurement.
The nurse is assessing pain levels in a critically ill patient . The nurse recognizes that which patient action as indicatin g the greatest level of pain?
- A. Brow lowering
- B. Eyelid closing
- C. Grimacing
- D. Staring
Correct Answer: C
Rationale: Correct Answer: C (Grimacing)
Rationale:
1. Grimacing is a universal nonverbal sign of pain.
2. It involves facial muscles, indicating a high level of discomfort.
3. Brow lowering and eyelid closing are subtle signs, less indicative of severe pain.
4. Staring may signify concentration, not necessarily pain.
Summary:
Grimacing is the correct choice as it directly correlates with pain intensity, unlike the other options which are less specific or relevant indicators of severe pain.
Following insertion of a pulmonary artery catheter (PAC),a bthirbe. cpohmy/tessitc ian orders the nurse to obtain a blood sample for mixed venous oxygen saturation (SvO ). Which action by the nurse best ensures the obtained value is accurate?
- A. Zero referencing the transducer at the level of the phlebostatic axis following insertion WWWWWW ..TTHHEENNUURRSSIINNGGMMAASSTTEERRYY..CCOOMM
- B. Calibrating the system with a central venous blood sample and arterial blood gas value
- C. Ensuring patency of the catheter using a 0.9% normal asbailrbin.ceo ms/otelsut tion pressurized at 300 mm Hg
- D. Using noncompliant pressure tubing that is no longer t han 36 to 48 inches and has minimal stopcocks
Correct Answer: B
Rationale: The correct answer is B because calibrating the system with central venous and arterial blood samples ensures accuracy of the mixed venous oxygen saturation (SvO2) measurement. This calibration allows for comparison of the values obtained from both sources to confirm the accuracy of the measurement.
Choice A is incorrect because zero referencing the transducer at the level of the phlebostatic axis does not directly address the accuracy of the SvO2 measurement.
Choice C is incorrect because ensuring patency of the catheter using normal saline pressurized at 300 mm Hg does not directly impact the accuracy of the SvO2 measurement.
Choice D is incorrect because using noncompliant pressure tubing does not ensure the accuracy of the SvO2 measurement. The length of the tubing and the presence of stopcocks are not directly related to obtaining an accurate SvO2 value.
The nurse is caring for a patient with severe neurological impairment following a massive stroke. The primary care provider has ordered tests to detearbmirbi.ncoem b/treasit n death. The nurse understands that criteria for brain death includes what crite ria? (Select all that apply.)
- A. Absence of cerebral blood flow.
- B. Absence of brainstem reflexes on neurological examin ation.
- C. Presents of Cheyne-Stokes respirations.
- D. Confirmation of a flat electroencephalogram.
Correct Answer: A
Rationale: The correct answer is A: Absence of cerebral blood flow. Brain death is determined by the irreversible cessation of all brain functions, including blood flow to the brain. When there is no cerebral blood flow, the brain is unable to function, leading to brain death. This criterion is essential in diagnosing brain death as it indicates a complete loss of brain function.
Explanation for why the other choices are incorrect:
- B: Absence of brainstem reflexes on neurological examination is a common sign of brain death, but it is not the primary criterion.
- C: Presence of Cheyne-Stokes respirations is not indicative of brain death. It is a pattern of breathing that can be seen in various conditions, not specifically brain death.
- D: Confirmation of a flat electroencephalogram is a supportive test for brain death but not the primary criterion. The absence of brain activity on an EEG can help confirm brain death but is not as definitive as the absence of cerebral blood flow.