The single breath nitrogen washout test
which includes the closing volume measurement, is performed with a demand valve, or reservoir bag, a pressure differential or other type pneumotachograph, microprocessor or chart recorder, and a nitrogen analyzer.
If the ultrasound was normal but TFTs indicated hypothyroidism, patients underwent a perchlorate washout test
. Children who had normal ultrasounds and normal TFTs were followed for a full year with repeat TFT testing prior to discharge.
Caption: FIGURE 1: Spearman correlation of phase III slope of the nitrogen single-breath washout test
([SIII.sub.N2]) with A, hemoglobin (Hb) ([r.sub.s]=-0.344; P=0.034); B, forced vital capacity (FVC) ([r.sub.s]=-0.671; P< 0.0001); C, diffusing capacity for carbon monoxide (DLco) ([r.sub.s]=-0.376; P=0.019); and D, the 6-min walking distance (6MWD) ([r.sub.s]=-0.554; P=0.0003).
Single-breath washout tests
to assess small airway disease in COPD.
Report accuracy eliminates the need for other time-consuming, labor-intensive steel fiber mix quality control measures, chiefly washout tests
, Bekaert engineers contend.
conducted on the Pro Star Wheel Bearing Grease found a washout rate that's approximately half that of traditional grease--good news considering a boat trailer loses about 8 percent of traditional grease each time it's dunked into the water.