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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.
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When caring for a patient with pulmonary hypertension, which parameter is most appropriate for the nurse to monitor to evaluate the effectiveness of the treatment?
- A. Central venous pressure (CVP)
- B. Systemic vascular resistance (SVR)
- C. Pulmonary vascular resistance (PVR)
- D. Pulmonary artery wedge pressure (PAWP)
Correct Answer: C
Rationale: The correct answer is C: Pulmonary vascular resistance (PVR). PVR is the most appropriate parameter to monitor in a patient with pulmonary hypertension as it directly reflects the resistance in the pulmonary circulation. A decrease in PVR indicates a reduction in the constriction of blood vessels in the lungs, suggesting improvement in pulmonary hypertension. Monitoring CVP (A) is more relevant in assessing fluid status, SVR (B) is more indicative of systemic vascular tone, and PAWP (D) is useful in assessing left-sided heart function, but they are not as specific to evaluating the effectiveness of treatment for pulmonary hypertension.
A child is receiving maintenance intravenous (IV) fluids at the rate of 1000 mL for the first 10 kg of body weight, plus 50 mL/kg per day for each kilogram between 10 and 20. How many milliliters per hour should the nurse program the infusion pump for a child who weighs 19.5 kg?
- A. 24
- B. 61
- C. 73
- D. 58
Correct Answer: B
Rationale: To calculate the IV fluids for a 19.5 kg child:
1. For the first 10 kg: 1000 mL
2. For the weight between 10-20 kg: (19.5 kg - 10 kg) * 50 mL/kg = 475 mL
Total IV fluids = 1000 mL + 475 mL = 1475 mL
To convert to mL per hour: 1475 mL / 24 hours = ~61 mL/hr
Therefore, the correct answer is B (61 mL/hr).
Incorrect Choices:
A (24 mL/hr): Incorrect, as it doesn't consider the additional fluids for the weight between 10-20 kg.
C (73 mL/hr) and D (58 mL/hr): Incorrect, as these values are not obtained from the correct calculation based on the given formula.
A Muslim patient has been admitted to the critical care unit with complications after childbirth. Based on the Synergy Model, which nurse would be the most inappropriate to assign to care for this patient?
- A. New graduate female nurse
- B. Most experienced female nurse
- C. New graduate male nurse
- D. Female nurse with postpartum experience
Correct Answer: C
Rationale: Step-by-step rationale:
1. The Synergy Model emphasizes matching nurse competencies with patient needs.
2. A male nurse may not be culturally appropriate for a Muslim female patient due to religious beliefs.
3. Gender segregation is important in Islamic culture, especially concerning intimate care.
4. Therefore, assigning a new graduate male nurse to care for a Muslim female patient in critical condition is the most inappropriate choice.
Summary:
- Choice A is incorrect because being a new graduate does not impact cultural competence.
- Choice B is incorrect as experience does not necessarily make a nurse the best fit for a specific patient.
- Choice D is incorrect as postpartum experience is relevant, but cultural considerations are more critical in this scenario.
A patient who has been declared brain dead is considered a potential organ donor. In order to proceed with donation, the nurse must understand that applicable concept?
- A. A signed donor card mandates that organs be retrieved in the event of brain death.
- B. After brain death has been determined, perfusion and o xygenation of organs is maintained until organs can be removed in the operatin ag bi rbro .co omm /t. e st
- C. The healthcare proxy does not need to give consent for the retrieval of organs.
- D. Once a patient has been established as brain dead, life support is withdrawn and organs are retrieved.
Correct Answer: B
Rationale: The correct answer is B because after brain death is confirmed, maintaining perfusion and oxygenation of organs is crucial to ensure their viability for donation. This process allows organs to be retrieved in optimal condition during the operation. Choice A is incorrect because a signed donor card is not a legal mandate for organ retrieval. Choice C is incorrect as the healthcare proxy's consent is typically required for organ donation. Choice D is incorrect because life support is not immediately withdrawn upon brain death confirmation; instead, organ preservation measures are initiated.
Which of the following are components of the Institute for Healthcare Improvement’s (IHI’s) ventilator bundle? (Select all that apply.)
- A. Interrupt sedation each day to assess readiness to extub aa bit re b.. c om/test
- B. Maintain head of bed at least 30 degrees elevation.
- C. Provide deep vein thrombosis prophylaxis.
- D. Provide prophylaxis for peptic ulcer disease.
Correct Answer: A
Rationale: The correct answer is A because interrupting sedation daily to assess readiness to extubate is a key component of IHI's ventilator bundle to prevent ventilator-associated pneumonia. This practice helps prevent over-sedation, reduce the duration of mechanical ventilation, and decrease the risk of complications. The other choices, B, C, and D, are incorrect as they are not specific components of the IHI's ventilator bundle. Maintaining head of bed elevation, providing deep vein thrombosis prophylaxis, and prophylaxis for peptic ulcer disease are important aspects of critical care but are not directly related to the ventilator bundle protocol outlined by IHI.