![]() ![]() The cuff itself may cause complications including: tracheal stenosis, granulomas, tracheal erosion, tracheomalacia, trauma and subsequent necrosis of the tracheal wall, and T-E or T-I fistula. Airway cutout with an inflated tracheostomy tube. Bohr equation however, it requires an estimated. Physiologic Complications of Tracheostomy. The ratio of physiologic dead space to tidal volume is usually about 1/3. Physiologic dead space is the sum of airway dead space and alveolar dead space and can be calculated with the. ![]() Putting all these values together, Figure 13 demonstrates the profound differences in the lung volumes that affect ventilation of a 2. A larger dead space means less of the TV is available to ventilate alveoli and more of each breath is wasted. ![]() Alveolar dead space is the volume of gas within unperfused alveoli (and thus not participating in gas exchange either) it is usually negligible in the healthy, awake patient. Dead space is also higher in the infant (3 compared with 2 mL/kg in the adult). Anatomic dead space is the volume of gas within the conducting zone (as opposed to the transitional and respiratory zones) and includes the trachea, bronchus, bronchioles, and terminal bronchioles it is approximately 2 mL/kg in the upright position. Physiologic or total dead space is the sum of anatomic dead space and alveolar dead space. Dead space is the volume of a breath that does not participate in gas exchange. ![]()
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