Procedures and treatments

Preparing a child for a procedure or treatment can be an anxious occasion. Great Ormond Street Hospital have produced a number of factsheets to help explain what will happen and what to expect.

Procedures and treatments search

Search for information on procedures and treatments at Great Ormond Street Hospital.

If you see it, say it – raising concerns about your child

While everyone at Great Ormond Street Hospital (GOSH) is an expert in their field, you are the expert in your child. You will know better than us if they are not behaving as they usually do or seem different in some way. Studies have shown that caregivers are often the first people to spot changes in the health of their child, even when in a clinical environment.

One-way (speaking) valves

This page from Great Ormond Street Hospital (GOSH) explains about one-way (speaking) valves, what they do and how to encourage your child to wear the valve. A one-way valve is a plastic attachment that fits on to the end of your child’s tracheostomy tube.


Angiography is a procedure that allows doctors to look at blood vessels in great detail using X-rays. This page from Great Ormond Street Hospital (GOSH) explains about an angiography procedure, what it involves and what to expect when your child comes to GOSH have one. 

Nasopharyngeal airways for craniofacial conditions

A nasopharyngeal airway is a small, plastic tube that keeps your child’s nostrils open, allowing them to breathe more easily. Children with craniofacial conditions may need a nasopharyngeal airway. This page from Great Ormond Street Hospital (GOSH) explains about nasopharyngeal airways, why they might be needed for children with craniofacial conditions and how to look after them at home.

Gastrojejunostomy (transgastric jejunal) feeding device care

A gastrostomy is a surgical opening through the skin of the abdomen to the stomach. A gastrojejunostomy device is inserted through this opening to the stomach and then on to the first part of the small intestine (jejunum). This means that liquid feed can be delivered directly into the small intestine bypassing the mouth, throat and stomach. This page from Great Ormond Street Hospital (GOSH) describes the procedure to insert a gastrojejunostomy feeding device and explains the care it will need afterwards.

Having a sweat test

A sweat test involves collecting sweat and measuring the amount of salts (chloride). This helps us to assess whether your child might have cystic fibrosis (CF), a genetic condition that affects the lungs and the digestive system. This page from Great Ormond Street Hospital (GOSH) describes what to expect when your child has a sweat test.

Ajmaline provocation test

This page explains about ajmaline provocation tests, what is involved and what to expect when your child comes to Great Ormond Street Hospital (GOSH) for the test. An ajmaline provocation test is carried out to diagnose a specific condition called Brugada syndrome.