inclusion_criteria: OR
type: criterion
logical_operator: AT_LEAST
logical_operator_arguments: 2
values: type: criterion
name: Evidence of intestinal obstruction
logical_operator: AND
values: type: symptom
name: bile-stained vomiting
type: criterion
logical_operator: OR
values: type: symptom
name: examination findings of acute abdominal distension and abnormal or absent bowel sounds
type: symptom
name: fluid levels and dilated bowel loops on plain abdominal radiograph
type: criterion
name: Features of intestinal invagination
logical_operator: AT_LEAST
logical_operator_arguments: 1
values: type: symptom
name: abdominal mass
type: symptom
name: rectal mass
type: symptom
name: intestinal prolapse
type: diagnostic_test
name: plain abdominal radiograph showing a visible intussusceptum or soft tissue mass
type: diagnostic_test
name: abdominal ultrasound showing a visible intussusceptum or soft tissue mass
type: diagnostic_test
name: abdominal CT scan showing a visible intussusceptum or soft tissue mass
type: criterion
name: Evidence of intestinal vascular compromise
logical_operator: OR
values: type: symptom
name: blood per rectum
type: symptom
name: stool containing red currant jelly material
type: symptom
name: blood on rectal examination
type: criterion
logical_operator: AND
values: type: criterion
logical_operator: AT_LEAST
logical_operator_arguments: 1
values: type: criterion
name: Evidence of intestinal obstruction
logical_operator: AND
values: type: symptom
name: bile-stained vomiting
type: criterion
logical_operator: OR
values: type: symptom
name: examination findings of acute abdominal distension and abnormal or absent bowel sounds
type: symptom
name: fluid levels and dilated bowel loops on plain abdominal radiograph
type: criterion
name: Features of intestinal invagination
logical_operator: AT_LEAST
logical_operator_arguments: 1
values: type: symptom
name: abdominal mass
type: symptom
name: rectal mass
type: symptom
name: intestinal prolapse
type: diagnostic_test
name: plain abdominal radiograph showing a visible intussusceptum or soft tissue mass
type: diagnostic_test
name: abdominal ultrasound showing a visible intussusceptum or soft tissue mass
type: diagnostic_test
name: abdominal CT scan showing a visible intussusceptum or soft tissue mass
type: criterion
name: Evidence of intestinal vascular compromise
logical_operator: OR
values: type: symptom
name: blood per rectum
type: symptom
name: stool containing red currant jelly material
type: symptom
name: blood on rectal examination
type: criterion
name: Evidence of intestinal vascular compromise
logical_operator: AT_LEAST
logical_operator_arguments: 3
values: type: criterion
name: Predisposing factors: age <1 year and male sex
logical_operator: AND
values: type: demographic_criteria
name: Less than one year old
attribute: age
operator: <=
value: 1
unit: years
type: demographic_criteria
name: Male gender
attribute: gender
operator: ==
value: male
type: symptom
name: abdominal pain
type: symptom
name: vomiting
type: symptom
name: lethargy
type: symptom
name: pallor
type: symptom
name: hypovolemic shock
type: diagnostic_test
name: Plain abdominal radiograph showing an abnormal but non-specific bowel gas pattern
value: abnormal but non-specific bowel gas pattern