With Fick technique to measure blood flow, if a patient breaths in 0.35 liter ox

Question

With Fick technique to measure blood flow, if a patient breaths in 0.35 liter oxygen per minute, concentration in the artery is 0.20 liter/liter of blood and the oxygen concentration in the pulmonary artery is 0.15 liter/liter of blood. What is the average blood flow? A. 5 liters/minute B. 7 liters/minute C. 6 liters/minute D. 8 liters/minute Which of the following about spirometer is not true ____ A. It directly measures the air flow velocity B. It can be used to measure tidal volume, vital capacity, functional residual capacity C. Spirometer can be built based on ultrasonic principle due to air flow can modulate the ultrasound speed D. Differential pressure spirometer measures the flow velocity by measuring the pressure different between two points Which of the following is not true ____ A. Obstructive lung disease is often shown in the expiratory phase B. Forced vital capacity maneuver can often be used to detect obstructive lung disease C. Vital capacity is often used to test restrictive lung disease D. Minute ventilation is a better indicator than alveolar ventilation in the pulmonary function tests. With aperture count setup to conduct complete blood cell count, which of the following is not true.____ A. Each impedance pulse indicate one blood cell B. The magnitude of the impedance indicate the size of the blood cell C. Continuous vacuum suction is required in the setup D. The magnitude of the impedance indicate the number of blood cells passing through the hole In the Nitrogen washout technique to measure functional residual capacity, which of the following is not true ____ A. Patient start to breath in pure oxygen at the end of quiet inspiration of normal breathing B. It usually requires about 10 minutes to completely wash out the nitrogen in the lung C. Patient can stop the breathing of oxygen at any time point of the breathing cycle after 10 minutes. D. The technique can also be used to measure Total Lung capacity

Explanation / Answer

12) 7 litre/minute
   Average blood flow =(oxygen consumption)/(oxygen conc in artery- oxygen conc in pulmonary)
=0.35/(0.20-0.15)
=7

13) a. It measure air flow but not directly ,firstly it measures pressure at two differrent points then from that it measure velocity.

14) b

15) c

16)d

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