3-3-2 Rule

3-3-2 rule is an assessment tool used for medical professionals to predict difficult intubations based on characteristics of airways. One of the most critical elements of patient safety is a proper airway. Thus, difficult intubations are a common cause of morbidity and mortality. According to the American Society of Anesthesiologists, intubation is determined to be complicated when an experienced anesthesiologist requires more than 3 attempts or longer than 10 minutes for successful endotracheal intubation. The 3-3-2 rule serves to estimate if the alignment of the openings of the larynx is possible given anatomical findings. 3: A measurement of three fingers between the upper and lower teeth of the open mouth of a patient indicates the ease of access. 3: Same from the anterior tip of the mandible to the anterior neck provides an estimate of the volume of the submandibular space. 2: A measurement of two fingers between the floor of the mandible to the thyroid notch on the anterior neck identifies the location of the larynx. More detailed by the link.