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220 patients are allocated randomly to the morning group (am group) or the afternoon group (pm group) and assessed by quality of bowel preparation and residual volume gastric residue.
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| Measure | Description | Time Frame |
|---|---|---|
| ottawa score | Two nurses observe cleaning of three parts of colon and give a score for each. | a day |
| gastric residual volume | Gastric contents are suctioned and measured. | 30 minutes |
| colonic residual volume | Colonic fluids are suctioned and measured. | 30 minutes |
| Measure | Description | Time Frame |
|---|---|---|
| reflux | incidence of reflux during both the EGD and colonoscopy | 60mins |
| adenoma detection rate | percentages of patients screened with colonic adenoma in total patients |
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Inclusion Criteria:
Patients are able to follow the instructions of bowel preparation and have good ability of walking at least an hour.
Exclusion Criteria:
Clinical diagnosis of obstruction of bowel and sever renal and heart disease.
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Participants have a cluster of elective EGD and colonoscopy under anesthesia.
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Peking Union Medical Hospital | Beijing | Beijing Municipality | 100730 | China | ||
| Peking Union Medical College Hospital |
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| a day |
| Beijing |
| China |