@rtwademethod: One of the most common bedside calls respiratory therapists receive is: “RT… the patient’s SpO₂ is dropping.” RT students preparing for the NBRC TMC and CSE exams should understand the difference between V/Q mismatch and shunt. Key concept: Good lung down. If the diseased lung is positioned downward (like pneumonia), the shunt effect worsens. A quick bedside assessment: Increase FiO₂ and watch the oxygen saturation response. • Rapid improvement → V/Q mismatch • Slow or minimal improvement → Shunt This is a gold standard respiratory therapy concept tested on the NBRC RRT exams.#RTstudent ##RespiratoryTherapy #TMCexam #RRTprep