A nurse is caring for a client who received benzocaine spray prior to a recent bronchoscopy. The client presents with continuous cyanosis even with oxygen therapy. Which action should the nurse take next?

Correct Answer: B

Rationale: The correct answer is B: Notify the Rapid Response Team. Continuous cyanosis despite oxygen therapy following benzocaine administration may indicate methemoglobinemia, a serious adverse effect. Rapid Response Team should be alerted for immediate intervention and monitoring. Albuterol treatment (A) would not address methemoglobinemia. Assessing peripheral pulses (C) may not provide immediate assistance. Obtaining blood and sputum cultures (D) is not the priority in this situation.

Correct Answer: B

Rationale: The correct answer is B: Oxygen and Nitrogen. This gas mixture is used by divers to prevent Oxygen toxicity because it closely mimics the composition of the air we breathe. Oxygen toxicity can occur at high partial pressures of Oxygen, which can lead to seizures and other serious health issues. Choices A, C, and D are incorrect because CO2 and rare gases are not typically used in diving gas mixtures, and including CO2 in the mixture can increase the risk of Oxygen toxicity. Nitrogen is used as a diluent to reduce the partial pressure of Oxygen, making it safer for divers.

Correct Answer: C

Rationale: Rationale: The paranasal sinuses act as resonating chambers in speech production due to their location near the nasal cavity and their ability to amplify sound vibrations. When infected, the sinuses can become inflamed, affecting speech clarity. The trachea (A) is a passageway for air, not involved in speech. The pharynx (B) is a common pathway for both air and food, not a resonating chamber. The larynx (D) contains the vocal cords for sound production but is not primarily responsible for speech resonance.

Correct Answer: B

Rationale: The correct answer is B: First thing in the morning. Sputum should be collected in the morning because it is usually more concentrated, making it easier to obtain a good sample. This is important for accurate analysis and identifying potential pathogens causing the patient's symptoms. Collecting sputum immediately after a meal may result in contamination with food particles. At bedtime, sputum may have accumulated overnight, but morning samples are still preferred due to concentration. Collecting sputum after a period of exercise may introduce respiratory secretions not reflective of the underlying condition.

Correct Answer: C

Rationale: To calculate pulmonary ventilation rate, multiply tidal volume by respiration rate. In this case, 500 mL * 14 bpm = 7,000 mL/min. Converting to liters, it's 7 L/min. Choice A is incorrect as it miscalculates the conversion from mL to L, B is incorrect due to incorrect calculation, and D is incorrect as it's not the accurate result of the multiplication.