Nokea
During the immediate postoperative period, the Post Anesthesia Care Unit nurse is assessing a patient who had hip surgery. The patient is experiencing tachycardia, tachypnea, and muscle rigidity, and his temperature is 103?°F. These findings indicate which condition?
- A. Tachyphylaxis
- B. Postoperative infection
- C. Malignant hypertension
- D. Malignant hyperthermia
Correct Answer: D
Rationale: Tachycardia, tachypnea, muscle rigidity, and elevated temperature (103?°F) are classic signs of malignant hyperthermia, a rare but serious complication of general anesthesia. Tachyphylaxis involves reduced drug response, infections develop more slowly, and malignant hypertension primarily affects blood pressure.
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The nurse is caring for a patient who is on a ventilator for respiratory arrest. Which parenteral anesthetic is also used for sedation during mechanical ventilation in ICU settings?
- A. Ketamine
- B. Midazolam
- C. Propofol
- D. Sevoflurane
Correct Answer: C
Rationale: Propofol is used for both general anesthesia and sedation in ICU settings for mechanically ventilated patients due to its rapid onset and short duration. Ketamine is used for anesthesia and moderate sedation, midazolam for moderate sedation, and sevoflurane is an inhaled anesthetic not typically used for ICU sedation.
When assessing patients in the preoperative area, the nurse knows that which patient is at a higher risk for an altered response to anesthesia?
- A. The 18-year-old patient who has never had surgery before
- B. The 32-year-old patient who stopped smoking 8 years ago
- C. The 44-year-old patient who is to have a kidney stone removed
- D. The 82-year-old patient who is to have gallbladder removal
Correct Answer: D
Rationale: Elderly patients, like the 82-year-old, are at higher risk for altered anesthesia responses due to age-related declines in hepatic, cardiac, respiratory, and renal function. Younger patients or those with no significant comorbidities are less likely to have altered responses.
When administering a neuromuscular blocking drug, the nurse needs to remember which principle?
- A. It is used instead of general anesthesia during surgery.
- B. Only skeletal muscles are paralyzed; respiratory muscles remain functional.
- C. It causes sedation and pain relief while allowing for lower doses of anesthetics.
- D. Artificial mechanical ventilation is required because of paralyzed respiratory muscles.
Correct Answer: D
Rationale: Neuromuscular blocking drugs paralyze all skeletal muscles, including respiratory muscles, requiring mechanical ventilation. They do not provide sedation or pain relief and are used with, not instead of, general anesthesia.
While monitoring a patient who had surgery under general anesthesia 1 hour ago, the nurse notes a sudden elevation in body temperature. This finding may be an indication of which problem?
- A. Tachyphylaxis
- B. Postoperative infection
- C. Malignant hypertension
- D. Malignant hyperthermia
Correct Answer: D
Rationale: Malignant hyperthermia is a life-threatening condition associated with general anesthesia, characterized by a sudden rise in body temperature. Tachyphylaxis refers to reduced drug response, postoperative infection develops more slowly, and malignant hypertension primarily involves blood pressure elevation.
A patient is to receive midazolam 2 mg IV push over 2 minutes just before an endoscopy procedure. The medication is available in a strength of 1 mg/mL. Identify how many milliliters of medication will the nurse draw up into the syringe for this dose.
Correct Answer: 2 mL
Rationale: To calculate: 1 mg/1 mL = 2 mg/x mL. Cross-multiply: (1 * x) = (1 * 2); x = 2 mL.