Chest
Communications to the EditorThe Abbreviated Alveolar Air Equation
REFERENCES (2)
The alveolar air equation abbreviated
Chest
(1978)- et al.
Experimental analysis in man of oxygen pressure gradient from alveolar air to arterial blood during rest and exercise at sea level and at altitude
Am J Physiol
(1946)
Cited by (16)
Pulmonary vascular improvement in severe COVID-19 patients treated with tocilizumab
2020, Immunology LettersCitation Excerpt :Vessel enlargement could be the result of an altered process of vaso-regulation leading to significant ventilation/perfusion (V/Q) mismatch [26]. The A-a O2 gradient as measuring the difference between the alveolar and the arterial oxygen concentration increases in conditions of V/Q mismatch, right-to-left shunt or alveolar hypoventilation [27–29]. Hypoxemia in COVID-19 patients is usually associated with increased A-a O2 gradient, meaning either V/Q mismatch or intrapulmonary shunting [30].
Enhanced platelet inhibition treatment improves hypoxemia in patients with severe Covid-19 and hypercoagulability. A case control, proof of concept study
2020, Pharmacological ResearchCitation Excerpt :Patients with no history of chronic respiratory failure, with an arterial blood gas analysis performed in room air showing severe hypoxemia with an arterial partial pressure of oxygen (PAO2/FIO2 < 250 mmHg), according to the Berlin definition for Acute Respiratory Distress Syndrome [14]. A-a O2 gradient was computed according to the equation reported in [15] Septic shock was defined as the concomitant presence of sepsis (life-threatening organ dysfunction caused by a dysregulated host response to infection with a Sequential [Sepsis-related] Organ Failure Assessment (SOFA) score of 2 points or more) and need for vasopressors to maintain a mean arterial pressure of 65 mmHg or greater and a serum lactate level greater than 2 mmol/L (>18 mg/dL) in the absence of hypovolemia [16].
Platonin mitigates acute lung injury in haemorrhagic shock rats
2011, ResuscitationCitation Excerpt :ABG were immediately analyzed with a blood gas analyzer (Rapidlab 348, Bayer Healthcare LLC, East Walpole, MA, USA). Alveolar–arterial oxygen difference (AaDO2) was calculated using the formula: [(760–47) × FiO2 − PaCO2/0.8] − PaO2.10 Then, another 5 mL of blood were drawn and centrifuged to separate plasma.
Does off-pump surgery offer benefit in high respiratory risk patients?. A respiratory risk stratified analysis in a propensity-matched cohort
2006, European Journal of Cardio-thoracic SurgeryA BAYESIAN MACHINE LEARNING APPROACH FOR ESTIMATING HETEROGENEOUS SURVIVOR CAUSAL EFFECTS: APPLICATIONS TO A CRITICAL CARE TRIAL
2024, Annals of Applied Statistics