Jennifer Lopez, who had undergone surgery in the post-anesthesia care unit (PACU), is difficult to arouse two hours following surgery.
The PACU RN had been administering Morphine Sulfate intravenously to the client for complaints of post-surgical pain.
The client's respiratory rate is now 7 per minute and demonstrates shallow breathing.
The patient does not respond to any stimuli.
The nurse assesses the ABCs (remember Airway, Breathing, Circulation!) and obtains ABGs STAT! Measurement of arterial blood gas shows pH 7.10, PaC02 70 mm Hg, and HCO3 24 mEq/L. What does this mean?
Respiratory Acidosis, Uncompensated.
Respiratory Acidosis, with Partial Compensation.
Metabolic Alkalosis, Uncompensated.
Metabolic Acidosis, with Partial Compensation.
The Correct Answer is A
Choice A rationale
The arterial blood gas values indicate a primary respiratory issue. The pH of 7.10 is significantly below the normal range (7.35-7.45), indicating acidosis. The PaCO2 of 70 mmHg is elevated above the normal range (35-45 mmHg), directly causing the acidosis by increasing carbonic acid. The bicarbonate (HCO3) level of 24 mEq/L is within the normal range (22-26 mEq/L), signifying no renal compensation has occurred, thus it is uncompensated. This pattern is characteristic of respiratory acidosis.
Choice B rationale
Partial compensation would be evident if the bicarbonate level was outside its normal range, indicating renal attempts to buffer the acidosis. Since the HCO3 is 24 mEq/L, which is within the normal range, there is no evidence of the kidneys compensating for the respiratory acidosis. Therefore, this option is incorrect as compensation is absent.
Choice C rationale
Metabolic alkalosis is characterized by an elevated pH and an elevated bicarbonate level, with potential compensatory changes in PaCO2. The patient's pH is acidotic (7.10) and the bicarbonate is normal (24 mEq/L), which directly contradicts the parameters for metabolic alkalosis. Therefore, this interpretation is not supported by the given ABG values.
Choice D rationale
Metabolic acidosis would present with a low pH and a low bicarbonate level, with potential compensatory changes in PaCO2. The patient's pH is low, but the primary driver is the elevated PaCO2, and the bicarbonate is normal. This set of values does not align with the criteria for metabolic acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
While establishing IV access and fluid replacement are crucial in trauma, they are secondary to ensuring cervical spine stabilization in a patient who is unresponsive after a head-on motor vehicle crash. Uncontrolled movement of an unstable cervical spine can lead to irreversible spinal cord injury, exacerbating neurological deficits or causing paralysis.
Choice B rationale
Monitoring pulse and blood pressure frequently is an important ongoing assessment in a trauma patient to identify shock or other systemic issues. However, in the immediate post-crash scenario with an unresponsive patient, the primary concern is preventing further neurological damage from potential spinal cord injury, making stabilization a higher priority.
Choice C rationale
Inserting a nasogastric tube for decompression might be necessary later in the management of a trauma patient to prevent aspiration or gastric distension. However, it is not the immediate priority action in an unresponsive patient following a head-on collision, where airway, breathing, circulation, and most importantly, cervical spine protection are paramount.
Choice D rationale
In an unresponsive client following a head-on motor vehicle crash, cervical spine injury must be presumed until ruled out. Any movement of the head or neck could further compromise the spinal cord, leading to permanent neurological deficits or even death. Therefore, keeping the neck stabilized using a cervical collar and backboard is the absolute priority to prevent further injury.
Correct Answer is ["A","C","D","E"]
Explanation
Choice A rationale
Obtaining informed consent is a fundamental ethical and legal requirement before any invasive medical procedure, including a bronchoscopy. This ensures patient autonomy, allowing them to make an educated decision based on understanding the procedure's risks, benefits, and alternatives. The patient's signature indicates their voluntary agreement after a thorough discussion with the healthcare provider, demonstrating adherence to patient rights.
Choice B rationale
Flumazenil is a benzodiazepine receptor antagonist used to reverse the sedative effects of benzodiazepines. While benzodiazepines like midazolam are commonly used for conscious sedation during bronchoscopy, flumazenil is generally not kept readily available for routine use. It is an emergency reversal agent reserved for severe respiratory depression or over-sedation.
Choice C rationale
Ensuring the client is NPO (nil per os) for at least 6 hours prior to a bronchoscopy is crucial to prevent aspiration. The procedure involves manipulating the airway, which can stimulate the gag reflex and potentially lead to regurgitation of gastric contents into the lungs, causing aspiration pneumonia or acute respiratory distress. Fasting significantly reduces this risk.
Choice D rationale
Continuous monitoring of heart rate and oxygen saturation via a bedside heart monitor and pulse oximeter is essential during and after a bronchoscopy. This allows for immediate detection of adverse events such as hypoxemia, arrhythmias, or respiratory depression, enabling prompt intervention. Constant vigilance ensures patient safety throughout the procedure.
Choice E rationale
Midazolam, a short-acting benzodiazepine, is commonly used for conscious sedation during bronchoscopy. Its anxiolytic, sedative, and amnestic properties help to reduce patient anxiety, promote comfort, and minimize recall of the procedure. Its rapid onset and short duration of action make it suitable for outpatient procedures.
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