Hi, this is Tom, and in this episode I'm going to be going through interception,

and you can find notes at zero to finals.com and in the zero to finals pediatrics book,

and you can find flashcards and questions at members.0 tofinals.com. And at the end of the episode, we'll go through

some questions so you can test yourself on what you just heard. So let's jump straight in. Interception

involves a section of the bowel sliding or folding into itself in a telescoping motion. Often the Ileum enters the

seacom. The affected section is thickened, leading to a palpable mass in the abdomen,

and has a narrow lumen, obstructing the passage of feces through the bowel.

Interception most often occurs in infants between the ages of three months and two years,

and it's more common in boys.

It may be associated with other conditions, particularly viral illnesses,

Hennoxonline purpura, cystic fibrosis, intestinal polyps, and mechal diverticulum.

Let's go through the presentation.

The typical presentation is an infant under two years with an acute onset of severe

colicky abdominal pain, bilious or green vomiting, and red-current jelly stool, which is a mix of

blood, mucus and stool, which is a later sign in the condition.

On examination, there is a sausage-shaped mass in the right-upper quadrant.

A tom tip for you, if red-current jelly stool and a sausage-shaped mass in the abdomen

appears in your exams, think of interception.

The typical child in the exam will have had a viral upper respiratory tract infection preceding

the illness and will have features of intestinal obstruction, meaning vomiting, absolute

constipation and abdominal distension.

Finally, let's talk about management.

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