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10 Cards in this Set

  • Front
  • Back

Low oxygen levels in the blood

Hypoxemia

Degree of hypoxemia can be calculated using the ___

A-a gradient

The difference between the alveolar oxygen pressure and the arterial oxygen pressure

A-a gradient

Hypoxemic Respiratory failure is defined as




PaO2 < ___ mmHg


SpO2 < ___%

55 mmHg; 88%

Goals of oxygen therapy?





SaO2 > 88%


PaO2 > 55-60 (measured with ABG)

Contraindications to Oxygen Therapy

Severe COPD

Oxygen delivery devices that include nasal prongs, face masks and masks with reservoirs. They are indicated for patients with normal breathing patterns, depth and rate. When minute ventilation exceeds the slow rates of these devices, the oxygen reservoir is drained, and room air is inhaled for additional demands.

Low-flow delivery systems

Oxygen delivery devices that provide complete control of inhaled gas mixtures and deliver constant FiO2. They are not effected by changes in ventilatory patterns. A high velocity stream is created by passing oxygen through a narrowed orifice. It is indicated for abnormal breathing patterns, depth and rate. Examples include aerosol masks, trach masks, venti masks and face tents.

High-flow delivery systems

Waveforms in pulse oximetry should have what?

A dicrotic notch

Pulse oximetry is based off of what?

Spectrophotometry