Comparison on the effect on patient pain and discomfort by using CO2 instead of air for insufflation during gastroscopy.

To achieve a satisfactory examination of the GI tract it needs to be distended during endoscopic procedures. After the examinations many patients complain of abdominal pain and discomfort. This pain has been substantially reduced by substituting room air with CO2 in both colonoscopies and ERCPs. The use of CO2 during colonoscopy has become routine practice at many endoscopy centers.

In our study we will test the hypothesis that abdominal pain after gastroscopies also can be reduced by substituting room air with CO2.

Inclusion Criteria:

• Patients scheduled for OGD at the outpatient clinic of Telemark Hospital

Exclusion Criteria:

• Age <18
• Inability to give an informed concent
• Unsatisfactory norwegian language skills
• Patients not willing to participate
• COPD with dyspnoea NYHA 3-4