Initiating Ventilatory Support. 215a. Objectives. List the indications for ventilatory support List the factors analyzed to determine initial ventilator modes and settings Define the current modes of ventilation, listing The advantages and disadvantages of each Basic intro to settings.
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The volume of carbon dioxide eliminated per minute (which in a steady state is equal to that produced by the body (V\'CO2) is dependent on the concentration of carbon dioxide in alveolar gas and οnV\'A.
V\'CO2=V\'A× alveolar CO2 concentration or alveolar CO2 concentration=V\'CO2/V\'A.
The condition of hypoxemia refers to the low partial pressure of oxygen in the arterial blood. Hypoxemia is often confused with either anoxia, asphyxia, hypoxia or anemia. Although, these are in some way related to reduction in the levels of oxygen in the body, these are distinct medical conditions.
Arterial Oxygen Content = (Hgb x 1.34 x SaO2) + (0.0031 x PaO2) where,
Hgb is the hemoglobinSaO2 is the percentage of hemoglobin saturated with oxygen PaO2 is the partial pressure of arterial oxygen
(The symptoms of hypoxemia depend on the severity i.e. the amount by which the partial pressure has reduced.)
Rapid, shallow respiratory pattern frequently have pleural space disease (pleural effusion, hemothorax, pneumothorax).
Numerous disorders cause tachypnea, orthopnea, and other signs referable to the respiratory system in the absence of true respiratory disease. These disorders can confuse the clinician. Disorders such as hyperthermia, shock, metabolic acidosis and alkalosis, hyperthyroidism, fear or anxiety, pericardial tamponade, anemia, abdominal organ enlargement or ascites, and abnormalities with central control of respiration from drugs and metabolic or organic central nervous system disease are all causes of signs that may mimic true respiratory distress.
Increases MAP, decreased I-time