TMC Practice exam 25 questions #1 100% Correct Answers

TMC Practice exam 25 questions #1 100% Correct Answers Which of the following can accurately be stated about a widening alveolar-arterial oxygen gradient? - ANSWERS-increased intrapulmonary shunting A normal alveolar arterial oxygen gradient is below 65 mmHg. When that gradient rises to 200, 300, 400, or more, then you have what is called shunting. If the A-a gradient is less than 300 it's technically called a ventilation perfusion (VQ) mismatch. But generally speaking, as the gradient widens it can properly be said that there is an increase in pulmonary shunting. How many hours will an H cylinder with 1400 psi last for a patient receiving oxygen at 7 lpm? - ANSWERS-10hrs And H cylinder has a tank factor of 3.14. 3.14x1400 PSI = 4396 L. 4396 L / 7 L per minute = 628 min. 628 min./ 60 min.= 10.4 hours, or about 10 hours. When you get an answer that is not exact, pick the closest number possible. It is common on the exam not see the exact answer