Which of the following gas concentrations should be used to set the slope control when calibrating the PCO2 electrode of a blood gas analyzer? A. 5% B. 10% C. 15% D. 20% - B. SLope is high calbiration value and the low calibraiton value is just called calibration. PCO2 is the severnhas electrode. 5% for low and 10% high Which of the following is the most appropriate device to use for calibration of a dry rolling seal spirometer? A. 3 L syringe B. U tube C. Rotameter D. Manometer - A. spirometer is volume Most important calibration device in PFT for volumes Utube is pressure monator device Rotormeter is flow calibrator for a pneumotach device The PFT performs a single breath CO diffusion capacity test on a 54 year old pt diagnosed with COPD. The tech connects a sample line to the infrared absorption anaalyzer. This could result in A. faster absorption of the gases B. Failure of the chopper motor C. An increase in the response time D. Improper calibration - D. The PFT performs an FRC measurement on a 62 year old pt . During testing, the pt complains that she can inhale but it is very hard to exhale. THe tech should suspect A. excessive O2 flow in the circuit B. Incorrect position of the exhalation valve C. Exhausted scrubber D. Failure of the chopper motor - B. The PFT administers methacholine via breath actuated nebulizer to a pt as part of a bronchial provocation study. During the treatment the pt is having difficulty with nebulization of the drug. The most likely explanation is that A. the pt is unable to generate enough flow through the nebulizer B. the exhalation valve is obstructed C. the connecting tubing is too long D. moisture has accumulated in the neb cup - A. The PFT performs a DLCO RB study. During the study the patient complains of feeling hot and becomes tachypneic. The most likely cause for this is A. Expired calcium sulfate B. missing scrubber C. use of Permapure tubing D. incorrect placement of desiccant - B. The PFT performs an excercise test on a 58 year old pt. The tech has applied the ECG electrodes and notes that the LEAD II tracing displays an inverted QRS complex This is most likely caused by A. reversal of the positive and negative electrodes B. Incorrect speed of the ECG paper C. Electrodes not containing conductive gel D. incorrect number of electrodes placed on the pt - A. The gathers and assembles equipment in preparation for a PFT. During testing the pressure differential pneumotachometer displays low readings for the flow measurements. This is most likely the result of A. moisture accumlation in the transducer lines B. Cooling of the pneumotachometer C. Inaccurate current flow used during testing D. increased resistance in the system - A The PFT utilizes a theremal element to measure flow rates during a pulmonary function study. THe tech notes that the volume readings are uncharacterisctically low in comparision to the pts previous PFT. This could be caused by A. Increased compliance B. High amount of deadspace C. decreased resistance D. Low temperature - C. At the end of the day, the PFT reviews the lists of pts scheduled for testing for the following day. The tech notes that there is a pt who is suspected of having TB scheduled for mid morning testing. THe tech should A. Contact the referring MD B. cancel the appt C. proceed at the scheduled time D. reshedule the pt for the end of the day - D. THe PFT performs an exercise test on a 42 year old pt. The tech applied the ECG electrodes and notes that the tracing produces a large amount of artifact. In order to eliminate the artifact the tech should A. place the electrodes directly over bony areas B. replace the electrodes C. assure that the skin was properly prepared D. adjust the gain control on the monitor - C.