static compliance


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stat·ic com·pli·ance

the value obtained when compliance is measured at true equilibrium, that is, in the absence of any motion.

stat·ic com·pli·ance

(stat'ik kŏm-plī'ăns)
1. The ratio of the change in volume of a distensible vessel to the change in distending pressure when the pressure change is measured between points in time when the system is at rest.
2. The slope of the statically determined pressure-volume curve.

static compliance

A volume-to-pressure measurement of lung distensibility with exhalation against a closed system, taken under conditions of no airflow. It can be represented mathematically as: Tidal volume/Pplat-total PEEP (positive end-expiratory pressure).
See also: compliance
References in periodicals archive ?
The second condition can also be written in order to keep only strictly positive or strictly negative static compliances, when their sign is well known from physical considerations.
VL = volume loading, MABP = mean arterial blood pressure, HR = heart rate, Ppeak = airway peak pressure, Pplat = airway plateau pressure, Cstat = total static compliance of the respiratory system, ETC[.sub.2] = end-tidal C[O.sub.2], SV-TOE = stroke volume measured using transoesophageal echocardiography, PPV = pulse pressure variation, SVV = stroke volume variation.
Injured 21.0 22.9 Ventilator Test lung Meas [DELTA]V (ml) SV 300 Normal 5.9 Injured 11.1 840 ventilator Normal 6.9 Injured 13.8 Evita 4 Neoflow Normal 7.6 Injured 14.7 [DELTA]P=the difference between Ppl and PEEP (Ppl minus PEEP), Est [DELTA]V=estimated delta V, the products of static compliance of the breathing circuit (1.09 ml/cm[H.sub.2]O) and delta P; Meas [DELTA]V=measured delta V, the difference between [V.sub.TV] and Act [V.sub.T] ([V.sub.TV] minus actual VT).
Manual hyperinflation is a technique that provides a tidal volume greater than the baseline volume and produces a turbulent flow that brings benefits such as improvement of static compliance of the respiratory system, increased oxygenation, mobilisation of secretions, and recruitment of collapsed areas of lung (McCarren and Chow 1996, Maa et al 2005).
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