The pyloric length must exceed how many millimeters in cases of hypertrophic pyloric stenosis?

In cases of hypertrophic pyloric stenosis, the diagnosis is often supported by measuring the pyloric channel. A pyloric channel length that exceeds 18 millimeters is a critical diagnostic criterion in this condition. Hypertrophic pyloric stenosis is characterized by the thickening of the pyloric muscle, which can lead to gastric outlet obstruction.

In evaluating the pylorus, a channel length greater than 18 mm typically indicates significant hypertrophy of the pyloric muscle, validating the diagnosis. Clinicians use this measurement along with other factors, such as muscle thickness and patient symptoms, to assess the severity of the obstruction and to decide on necessary interventions.

Other lengths mentioned in the options are not used as definitive cutoffs for diagnosing this condition, making 18 mm the accepted threshold in clinical practice for identifying hypertrophic pyloric stenosis accurately.