What is the acceptable value for static compliance (Cst) in mL/cm H2O?

Static compliance (Cst) is an important measurement in mechanical ventilation and respiratory care as it reflects the lung's ability to expand in response to pressure. Acceptable values for static compliance can help clinicians assess the mechanical properties of the lungs and the effectiveness of ventilatory strategies.

A static compliance value greater than 25 mL/cm H2O indicates that the lungs exhibit good compliance, meaning they can expand well when pressure is applied. This implies that the lung tissue is healthy and not overly stiffer, which could lead to increased work of breathing or ventilation difficulties. Maintaining static compliance above this threshold is important for patients on mechanical ventilation because it suggests effective lung function and helps prevent complications such as ventilator-induced lung injury.

Values below this range can indicate potential lung issues, such as reduced lung volume, atelectasis, or increased airway resistance. Therefore, the understanding that an acceptable value for static compliance is greater than 25 mL/cm H2O is crucial for evaluating and managing patients effectively during mechanical ventilation.