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Difficult colonoscopy: air, carbon dioxide, or water insufflation?
Alisha Chaubal1, Vikas Pandey1, Ruchir Patel1
1Department of Gastroenterology, Lokmanya Tilak Municipal Medical College and General Hospital, Mumbai, India.
Intestinal Research
|May 11, 2018
Summary
Water insufflation significantly reduces pain during colonoscopy in difficult cases compared to air or carbon dioxide. This method offers superior pain tolerance, especially for underweight and post-surgical patients.
Area of Science:
- Gastroenterology
- Endoscopy
- Patient Comfort
Background:
- Colonoscopy is challenging in patients with specific characteristics like low or high BMI, or prior abdominal surgery.
- Assessing patient tolerance to different insufflation methods is crucial for improving colonoscopy experience.
Purpose of the Study:
- To compare patient tolerance to air, carbon dioxide, and water insufflation during colonoscopy.
- To evaluate pain levels and successful cecal intubation rates across different insufflation groups.
Main Methods:
- Randomized controlled trial involving patients with anticipated difficult colonoscopies (BMI <18 or >30 kg/m², or previous abdominal surgery).
- Patients were assigned to air, carbon dioxide, or water insufflation.
- Primary endpoint: cecal intubation with mild pain (VAS <5) without sedation.
Main Results:
- Water insufflation achieved the primary endpoint in 84.9% of cases, significantly higher than carbon dioxide (43.8%) and air (32.7%).
- Mean pain scores (VAS) were significantly lower with water (3.93) compared to carbon dioxide (4.72) and air (5.17).
- Cecal intubation rates and procedure times were similar across all groups.
Conclusions:
- Water insufflation provides superior pain tolerance during colonoscopy compared to air or carbon dioxide.
- This benefit was particularly noted in underweight (BMI <18 kg/m²) and post-surgical patients.
- Water insufflation is a promising technique for enhancing patient comfort in challenging colonoscopies.
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