Thorough Flushing Strategy During Colonoscopy Examination

Study Overview
=================
Brief Summary
-----------------
The investigators plan to adopt a thorough flushing strategy when withdrawing the endoscope, and have zero tolerance for the liquid and foam in the intestinal lumen. Observe and compare the impact of this strategy with traditional limited degree suction methods on the results of colonoscopy. The research group and the control group respectively adopted a thorough flushing strategy and a limited flushing strategy, and compared the total time of colonoscopy examination, the time of withdrawal, the detection rate of polyps, the detection rate of small polyps, and the amount of flushing fluid between the two groups. Analyze the value of thorough flushing strategy for the efficiency and quality of colonoscopy examination.

Detailed Description
-----------------
Most physicians do not adopt a strategy of complete suction of fluid from the intestinal lumen during colonoscopy. There are both concerns about the time required for colonoscopy and the possibility of inability to thorough cleannig up. Some endoscopists believe that the visual field for partial cleaning of fecal water is acceptable and does not affect observation. This study aims to make an observation and comparison based on the existing problems mentioned above. With the help of direct water injection system, the investigators plan to adopt a thorough flushing strategy when withdrawing the endoscope, and have zero tolerance for the liquid and foam in the intestinal lumen. Observe and compare the impact of this strategy with traditional limited degree suction methods on the results of colonoscopy. The research group and the control group respectively adopted a thorough flushing strategy and a limited flushing strategy, and compared the total time of colonoscopy examination, the time of withdrawal, the detection rate of polyps, the detection rate of small polyps, and the amount of flushing fluid between the two groups. Analyze the value of thorough flushing strategy for the efficiency and quality of colonoscopy examination.

Official Title
-----------------
Clinical Study on the Application of Thorough Flushing Strategy During Colonoscopy Examination

Conditions
-----------------
Colonoscopy

Intervention / Treatment
-----------------
* Procedure: thorough flushing


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: People without contraindications for colonoscopy Exclusion Criteria: Patients diagnosed with colon polyps

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| limited<br>patients adopted limited flushing strategy | |
| thorough<br>Thorough flushing strategy | Procedure: thorough flushing<br>* The thorough flushing strategy refers to the thorough flushing of all liquid and foam accumulation areas during the inspection. Make all liquid accumulation parts in the intestinal cavity free of aspiratable liquid retention<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| time of examination | the time from insertion to exit the anus | 1week | 
| time of insertion | the time from insertion to arriving at cecum | 1week | 
| time of withdrawl | the time from cecum to anus | 1week | 
| number of polyps | the number of polyps found | 1week | 
| location of polyps | the location of polyps found | 1week | 
| shape of polyps | the shape of polyps found, classified into lateral, senssile and pediculated three types | 1week | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Boston score | the Boston score of bowel preparation (from 0-9) | 1week | 
| volume of water | volume of water used for flushing | 1week | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
colonoscopy, quality, polyps