CMA Certified Medical Assistant Diagnostic Testing and Laboratory Procedures Questions and Answers 2

Question 1

Which type of ECG electrode placement error would most likely cause artifact on Lead II?

Accepted Answer

Reversing the left arm and right arm electrodes

Answer

Reversing the LA and RA limb electrodes inverts Lead I and causes incorrect Lead II and Lead III waveforms.

Question 2

When performing a 12-lead ECG, the precordial lead V1 is placed at which anatomical location?

Accepted Answer

Fourth intercostal space, right sternal border

Answer

V1 is placed at the fourth intercostal space on the right side of the sternum.

Question 3

A patient's spirometry results show FEV1/FVC ratio below 70%. This finding is MOST consistent with:

Accepted Answer

Obstructive lung disease

Answer

An FEV1/FVC ratio below 70% indicates airflow obstruction, as seen in conditions like COPD and asthma.

Question 4

Which of the following is the MOST important instruction to give a patient before a fasting lipid panel?

Accepted Answer

Avoid all food and beverages except water for 9–12 hours before the test

Answer

A 9–12 hour fast (water only) is required for accurate lipid panel results because fatty foods raise triglyceride levels.

Question 5

When a point-of-care glucose meter gives a quality control result outside the acceptable range, the medical assistant should:

Accepted Answer

Repeat the QC test, and if still out of range, take the meter out of service and notify the supervisor

Answer

Out-of-range QC results indicate the meter may be unreliable; it must be removed from service and the issue resolved before use.

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