In practice a young patient with longstanding typical symptoms does not require investigation.
Investigation should be considered if the following features are present:
- atypical symptoms
 - dysphagia
 - short duration of symptoms in patient over 55 yr
 - weight loss
 
The investigation of GORD consists of one, or a combination, of the following:
- endoscopy:
- the most common initial investigation
 - can exclude other causes or dysphagia such as carcinoma
 - is normal in up to 65% of cases
 
 - symptoms requiring urgent referral of patients for endoscopy are (1):   
- gastrointestinal bleeding
 - iron deficiency anaemia
 - progressive unintentional weight loss
 - progressive difficulty swallowing
 - persistent vomiting
 - epigastric mass on palpation
 - suspicious barium meal result or other suspicious imaging result
 
 - factors requiring consideration of referral of patients for endoscopy include (1) :  
- previous gastric ulcer
 - previous gastric surgery
 - non-steroidal anti-inflammatory drug use
 - pernicious anaemia
 - family history of gastric cancer
 
 - barium radiology:
- may be used, particularly if a diagnosis of erosive oesophagitis is being considered
 
 - 24 hour oesophageal pH monitoring:
- particularly useful if a link between symptoms and acid reflux needs establishing
 
 
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