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My Primary Deck > Measurement Devices > Flashcards

Measurement Devices Flashcards

1
Q

Fowler’s Method

A

Measurement of anatomical dead space. Single breath N2 washout. Breathe in 100% O2 (single breath) then plot N2 concentration.

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2
Q

Absorption wavelengths of Pulse Oximeter

A

660nm (red) and 940nm (infrared) - then the ratio of absorption is converted via calibrated normograms

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3
Q

Absorption characteristics of MetHb

A

Absorbs more IR than OxyHb or DeOxyHb therefore results in an R value approaching 1, causing a calculated SpO2 trending towards 85%

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4
Q

Isobestic Point of Pulse Oximetry

A

805nm

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5
Q

Absorption characteristics of COHb

A

Predominantly absorbs light at 660nm and does not absorb at 940nm therefore causes a falsely raised reading

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6
Q

CPEX: Anaerobic Threshold

A

Less than 11 ml/kg/min = poor outcomes

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