Service manual

IQmark Digital Spirometer Operation Manual

Once the required number of Post-BD tests is performed, click the Save Review button

to display the Pre/Post comparison.

VC or SVC

This test can determine if a patient’s lungs are trapping air during a forced maneuver

(FVC test). Air trapping can be an indication of airway obstruction and is also sometimes

seen in older patients. This is a very slow and deliberate test. The patient takes 2 or 3

normal tidal breaths and then a slow, deep breath, and then a slow, full exhale.

Click the VC button. The VC button appears bold. If this is a Pre-BD test, make sure the

Pre message is displayed in the blue box in the middle of the test screen. Do not click the

Start New Test button until the patient is ready to perform the test.

To perform a VC test, the patient must perform the test according to the following

instructions:

 Inhale completely before placing the flow sensor mouthpiece into the mouth.

 Insert the mouthpiece just past the front teeth and seal the mouth to the flow

sensor mouthpiece with the lips.

 Take 3 or 4 tidal breaths with the mouthpiece in the mouth.

 Inhale as deeply as possible, until the technician observes a plateau at the

bottom of the graph.

 Blow out slowly and evenly until the technician observes a plateau at the top

of the graph or the device signals that the end of test criteria has been met.

 The technician should stop the test with the mouse or the ENTER key.

 Remove the mouthpiece from their mouth when instructed by the technician.

The patient must exhale at a faster rate during the “Blow out” phase than during the tidal

breaths. After the patient has completed the number of tests you require, click the Save

Review button and click Yes to save the test efforts.

MVV

The Maximum Voluntary Ventilation, or MVV, is the measurement of a patient’s

breathing when the patient inhales and exhales maximally and rapidly for 12 to 15

seconds. The software takes this result and extrapolates the results for a period of one

minute. MVV is expressed in liters per minute (L/min). This is a very demanding test

and patients must be allowed to rest between efforts. The MVV test is required to qualify

some patients for Social Security Disability benefits.

Click the MVV button. The MVV button now appears bold. For a Pre-BD test, make

sure the Pre message is displayed in the blue box in the middle of the test screen. Do not

click the Start New Test button until the patient is ready to perform the test.

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