TMC Practice Exam A + B Missed Questions with complete solutions

A 52 year-old post-operative cholecystectomy patient's breath sounds become more coarse upon completion of postural drainage with percussion. The respiratory therapist should recommend: A. Continuing the therapy until breath sounds improve. B. administering dornase alpha. C. administering albuterol therapy. D. deep breathing and coughing to clear secretions. correct answer: D. deep breathing and coughing to clear secretions. See Patient Assessment A healthy adult female can exhale what portion of her forced vital capacity in the first second? correct answer: 70% Following cardiac surgery, a 55 year-old patient has the following ABG results: pH 7.50, PaCO2 30 torr, PaO2 62 torr, HCO3 25 mEq/L, SaO2 92%, HB 14 g/dL, BE +2. Venous blood gas results are pH 7.39, PvCO2 43 torr, PvO2 37 torr, and SvO2 66%. Calculate the patient's C(a-v)O2. correct answer: 5% volume What value for the apnea-hypopnea index (AHI) is consistent with mild obstructive sleep apnea? correct answer: 5 to 15 The respiratory therapist is asked to evaluate the presence of Auto-PEEP on a patient receiving mechanical ventilation. In order to do this, what should the RT do? correct answer: Initiate an expiratory hold just prior to the next ventilator-delivered breath What do bronchial breath sounds heard over the lung periphery indicate? correct answer: lung consolidation (pneumonia) Rationale: should be vesicular in periphery A 60 kg (132 lb) patient is mechanically ventilated at the following settings: VC, A/C; VT 500 mL, respiratory rate 12/min, FIO2 1.00 and 10 cm H2O PEEP. The patient's peak airway pressure is 60 cm H2O and his SpO2 is 85%. A current chest x-ray shows diffuse bilateral infiltrates. Which of the following is the most appropriate action in order to reduce peak airway pressure? A. Increase the frequency. B. Change to airway pressure release ventilation. C. Decrease the inspiratory time. D. Increase PEEP to 15 cm H2O. correct answer: B. Change to airway pressure release ventilation.