After SIMV is initiated, the following patient data are obtained:FIO2 0.40 pH7.27Mandatory rate   8 PaCO255 torrTotal rate8 PaO2 94 torrVT550 mL HCO3-  25 mEq/LPEEP8 cm H2O BE-3 mEq/L   SaO2 (calc)97%Which of the following should a respiratory therapist recommend?

Spontaneous breathing trials with a T-piece have been initiated for a 50-year-old patient who has been receiving mechanical ventilation for 4 weeks.  With each trial, the patient becomes agitated, dyspneic, and tachypneic, and must be returned to the ventilator.  Which of the following should the respiratory therapist recommend?

A gas is saturated with 100% relative humidity at 32.2º C (90º F).  As the gas cools to 26.7º C (80º F), the relative humidity will

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?

A respiratory therapist is preparing to suction the endotracheal tube of a 6-year-old child.  When the therapist tests the negative suction pressure, the manometer goes to a maximum of -120 mm Hg.  Which of the following is the most appropriate action?

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

In the upright position, which region of the left lung would have the lowest ventilation-perfusion ratio?

Which of the following pulmonary disorders cause the alveolar-capillary membrane to thicken, hindering diffusion?

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

What is the normal value of hemoglobin?