GE CARESCAPE, User Manual

Page: 335 / 548

Patient Spirometry
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x = Paw
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y = Vol
Typical pediatric Paw-Vol loop
In pediatric use, the scales for pressure and volume are different from those of the
adult use. Pediatric patients have relatively high airway pressures due to the very
small endotracheal tube. Using a proportionally higher scale for pressure than for
volume makes it possible to draw pediatric loops with a shape that is similar to that
of adult loops.
Typically:
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High airway pressure (small diameter of the tube)
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Low compliance
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Insp > Exp (leak around tube) - loop remains open
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x = Paw
●
y = Vol
Flow-Vol phases
Flow-Vol loop illustrates the relationship between flow and volume. Inspiratory flow
shows the type of flow pattern used by the ventilator, and expiratory flow indicates
the resistance during expiration. All flow-restrictive incidents (airway obstruction,
intrinsic PEEP) are visible in the Flow-Vol loop.
2062971-001 CARESCAPE Modular Monitors 335