Fast MS Example Data for Medical Applications

Using a “Fast Orifice Inlet” and a ?2m PTFE sample line, the following data was collected. The sample line was held close to the subject’s Nose, and a series of breathing patterns were acquired.??

The MS was firstly calibrated in room air for N2, O2, CO2 and Ar.

The MS was set to collect data at an analysis dwell/measurement speed of 2ms / gas.

Looking at the data below and concentrating on the CO2 and O2 signals, the first block of peaks were measured at approximately 1 sec/breath for 10 breaths.

The second block were 20 breaths at approximately 0.7 sec/breaths.

The Third block was considerably faster and led to hyperventilation after 20 breaths. Finally, a single exhaled breath was recorded.?

As can be seen, both the inlet gas transfer speed and also the ability of the MS to plot data points at 2ms intervals enable you to clearly analyse the shape and profile of each individual breath!

Here is a zoomed version of the fastest set of breaths:

Note again the ability of the fast sample system as well as the ability of the MS to plot data points at 2ms intervals! The profile of each breath can now be seen again!?

Here is some more data that shows just 2 gases selected. CO2 and O2:

Again, you can clearly see the profile of every breath. The second set of breaths led to hyperventilation, as there were more than 120 breaths/minute.??

Note: The corresponding data is also available in an Excel File

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