Data below were obtained while an adult patient was receiving VC ventilation with an FIO2 of 0.50:                                           1300             1315          1330           1345PEEP (cm H2O)                      5               10                15              20BP (mm Hg)                       140/90        130/90       120/80      110/80SpO2 (%)                                75              90               94               95Static compliance                   20               40               60               55(mL/cm H2O)  Which of the following levels of PEEP should a respiratory therapist choose?

When administering dornase alfa (Pulmozyme) with a hand-held nebulizer, a respiratory therapist notes a patient is developing marked congestion with copious sputum production.  The therapist’s most appropriate action is to pause the treatment and

Following insertion of a CVP catheter, a chest radiograph is taken to evaluate the position of the catheter.  When viewing the radiograph, a respiratory therapist notes the tip of the catheter is in the superior vena cava.  The therapist should conclude the catheter

A 34-week gestational age infant has been stable while receiving mechanical ventilation.  Oxygen saturation decreases to 85% and does not respond to an increased FIO2. Transillumination of the chest produces a 1-cm halo that extends around the point of contact with the skin.  Which of the following should a respiratory therapist recommend?

A 77-year-old male patient is scheduled to undergo open heart surgery.  Preoperative spirometry results show the patient’s FEV1 is 80% of predicted and the FEV1/FVC is 83%, indicating

A patient has a reported SaO2 of 90%, hemoglobin 15, PaO2 of 61 mmHg, cardiac output of 6 L/min, and CvO2 of 14.2 vol%. What would the C(a-v)O2 equal?

What effect would an upper airway obstruction have on ventilation and perfusion?

An adult patient has a pulse of 142, a respiratory rate of 24, and a blood pressure of 78/55 mm Hg.  When examining the patient’s chest, a respiratory therapist notes an absence of breath sounds in the left chest with a hyperresonant percussion note.  Which of the following should the therapist recommend FIRST?

What changes would be expected with ventilation and perfusion in a patient with excessive blood loss?

Hypotension is sensed by baroreceptors, what response will this have on blood vessels and why?