Search Results

pH impedance study 

A pH impedance study measures movement of liquid and air up and down the oesophagus (the food pipe between the mouth and the stomach). This page from Great Ormond Street Hospital (GOSH) explains about the pH impedance study, what it involves and what to expect when your child comes to GOSH for the test.

Orbital box osteotomy

Orbital box osteotomy is an operation used to correct abnormal eye socket shape or placement. This information sheet from Great Ormond Street Hospital (GOSH) explains about the operation called orbital box osteotomy, which is used to treat craniofacial disorders. It explains how to prepare your child for surgery as well as what to expect in hospital afterwards.

Diaphragmatic hernia

The diaphragm is a curved muscle that separates the contents of the chest from the abdomen (tummy). Diaphragmatic hernias occur when the diaphragm does not form completely, leaving a hole.This page explains about diaphragmatic hernias, how they are treated and what to expect when a child comes to Great Ormond Street Hospital (GOSH) for treatment.

Tracheal stenosis

This page from Great Ormond Street Hospital (GOSH) explains tracheal stenosis, how it can be treated and what to expect when a child has treatment. This page mainly concentrates on the ‘long segment’ type of tracheal stenosis and its treatment.


Angiography is a procedure at Great Ormond Street Hospital (GOSH) that shows us the blood vessels and organs inside your body. It uses a dye that shows up on x-rays and gives a picture of how the blood is flowing around your body.


Headaches affect people of all ages – many adults remember having headaches as children. Headache in children can occur on its own (primary disorder) or as a result of another condition.