A7™ Operating Instructions 046-004667-00 5 - 23
Operations Parameter Monitoring (Spirometry)
AA
vs. Time
The Y-axis of the AA vs. Time waveform is labeled AA
. The unit of measure is %. You can adjust
the scales of the Y-axis (see “Gas Scales” on page 3-40). Though the X-axis is not labeled, it
represents a time scale of 0 to 15 seconds. If no agent is detected, the system displays AA vs. Time
waveform (see FIGURE 5-27). If an anesthetic agent such as sevoflurane is detected, the system
displays Sev vs. Time waveform (see FIGURE 5-28).
FIGURE 5-28 Example Simulated Sev vs. Time Waveform (available with the AG module)
5.10.5 Waveform Autoscaling
If the measured values of Paw, Flow, or Volume are larger than the boundary at the end of the
breath cycle, the system autoscales the Paw, Flow, or Volume at the beginning of next breath
cycle.
If the measured values of Paw, Flow, or Volume are less than the boundary minus a margin (see
TABLE 5-1) at the end of two continuous breath cycles, the system autoscales the Paw, Flow, or
Volume at the beginning of the next breath cycle.
5.11 Parameter Monitoring (Spirometry)
Spirometry is a respiratory monitoring technology that provides continuous (breath-by-breath)
measurement of patient lung mechanics. The resultant pressure, volume, flow, compliance, and
resistance data enables quick assessment of the patient’s pulmonary status.
Select the Spirometry tab to open the Spirometry Loop window (See section 3.5 (page 3-18)
"Spirometry Tab") .
NOTE: Thespirometry and waveforms can be displayed on the same screen.
Currently plotting loop, reference loop, and baseline loop display in manual and mechanical
ventilation modes.
Discharging the patient clears spirometry loops (baseline and reference loops).
Restarting the machine clears spirometry loops (baseline and reference loops).
SCALE MARGIN
Paw 3 cmH
2
O if Paw < 30 cmH
2
O
10 cmH
2
O if Paw ≥ 30 cmH
2
O
Flow 10 L/min if Flow
≤ 30 L/min
15 L/min if Flow > 30 L/min
Volume 25 ml if volume
≤ 100 ml
100 ml if volume > 100 ml
TABLE 5-1Autoscaling Margins of Paw, Flow, and Volume
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