1.   Although supplemental oxygen during gastroscopy significantly improved oxygen saturation, there was no correlation between oxygen saturation and any electrocardiographic changes.

2.   The aim of this study was to investigate the effects of supplemental oxygen both during and after upper gastrointestinal endoscopy.

3.   Supplemental oxygen at two litres per minute resulted in significantly higher oxygen saturation values during upper gastrointestinal endoscopy.

4.   This study shows that supplemental oxygen improves oxygen saturation values during upper gastrointestinal endoscopy, which is in keeping with previous studies of both gastroscopy and ERCP.

5.   This would imply that if supplemental oxygen is given its administration ought to be extended into the postgastroscopy period.

6.   We therefore cannot comment on the use of supplemental oxygen in these patients.

7.   The purpose of this prospective, double-blind, crossover trial was to assess the effects of supplemental oxygen on the intensity of dyspnoea.

8.   In patients with chronic obstructive pulmonary disease, the effects of supplemental oxygen on the subjective sensation of dyspnoea have been controversial.

9.   We did a prospective, double-blind, crossover study to assess the effects of supplemental oxygen in patients with hypoxaemic dyspnoea and terminal cancer.