MULTICHANNEL STG™ WAVEFORM DISPLAY

 

Click to see full view

Recorded lung sounds are displayed as a set of waveforms. The inspiration is marked by a green box and expiration is marked by blue box. This display allows visual examination of waveforms and time-expanded waveforms as well as audio playback of the data.

One can also listen to lung or heart sounds on any of the 16 channels in real time during the recording. Unlimited number of people can listen simultaneously with via wireless headphones. In our experience it is very educative to listen to the sounds and view them on the monitor at the same time.

The display of the traces, similar to an EKG, allows direct visual detection of the abnormalities. Each channel can be examined for crackles, wheezes, and irregular patterns of inspiration and expiration. Contrast between abnormal data and data recorded for healthy individuals is pronounced.

The STG uses sophisticated algorithm to identify abnormal lung sounds. Wheezes and rhonchi are marked by "w" and "r" respectively. The frequency of the wheeze is specified. Coarse and fine crackles are marked by "c" and "f" respectively. Initial deflection width (IDW), number of zero crossings and other crackle specific information is placed under each crackle.