What is the recommended downward force applied to the cricoid cartilage after loss of consciousness during rapid-sequence induction?

The recommended downward force applied to the cricoid cartilage after loss of consciousness during rapid-sequence induction is based on the need to effectively occlude the esophagus and prevent gastric contents from entering the trachea. A force in the range of 3.0 to 4.4 kg is considered optimal for this purpose. This level of pressure is sufficient to achieve esophageal compression without causing undue harm or discomfort to the patient.

Applying too little pressure might not adequately seal off the esophagus, increasing the risk of aspiration, which is a primary concern during rapid-sequence induction. Conversely, applying excessive force could lead to potential injury to the cricoid cartilage or surrounding structures. Therefore, the range of 3.0 to 4.4 kg strikes a balance between effective management of aspiration risk and patient safety, making it the recommended practice in this context.