Evidence map›Paper›PMID 33169704›Full record

Trial reportThe Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology2020

Effect of carbon dioxide versus room air insufflation on post-colonoscopic pain: A prospective, randomized, controlled study.

Feyza Gündüz, Haluk Tarık Kani, Shannon Chang, Esra Akdeniz, Fatih Eren, Yusuf Yılmaz, Yeşim Özen Alahdab

Open access · bronzeAbstract readRandomized Controlled Trial
In one paragraph

Trial report in The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.1field-weighted citation impact, top 53% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed, 6 citations in OpenAlex.

  1. Total Colonic Decompression Fails to Decrease Post- Colonoscopy Abdominal Pain: A Double-Blind Randomized Controlled Trial.The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology · 2026
    Trial
  2. The Effects of Positioning During Colonoscopy on Efficacy and Post-procedure Comfort.The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology · 2025
    Trial
  3. Association Between Sleep Quality and Postcolonoscopy Pain.The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology · 2026
    Observational
  4. Article
  5. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Feyza GündüzDepartment of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey;Marmara University, Institute of Gastroenterology, İstanbul, Turkey.
Haluk Tarık KaniDepartment of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey.
Shannon ChangDivision of Gastroenterology, Inflammatory Bowel Disease Center, New York University Langone Health, New York, New York.
Esra AkdenizDepartment of Medical Education, Marmara University, School of Medicine, İstanbul, Turkey.
Fatih ErenMarmara University Institute of Gastroenterology, İstanbul, Turkey; Department of Medical Biology, Marmara University School of Medicine, İstanbul, Turkey.
Yusuf YılmazDepartment of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey;Marmara University, Institute of Gastroenterology, İstanbul, Turkey.
Yeşim Özen AlahdabDepartment of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey;Marmara University, Institute of Gastroenterology, İstanbul, Turkey.
Marmara University · TRNYU Langone Health · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND/

aimsRoom air (RA) and carbon dioxide (CO2) are widely used to insufflate the colon to examine the mucosa in colonoscopy. Pain, discomfort, and bloating can be seen during and after colonoscopy secondary to bowel distention. This study aimed to investigate the effect of CO2 on post-procedure pain sensation (PPPS) in comparison with RA. MATERIALS AND

methodsPatients were randomly assigned to the RA and CO2 insufflation groups in a 1:1 ratio. The visual analog scale (VAS) was used to measure the pain before and after the colonoscopy. VAS score of 0 was accepted as the absence of pain and above 0 was accepted as the presence of pain. The primary outcome was to investigate the effect of CO2 insufflation on PPPS. Secondary outcomes were to investigate the other contributing factors affecting PPPS and the effect of CO2 on PPPS in patients with inflammatory bowel disease (IBD).

resultsA total of 204 patients were enrolled in the study. No significant difference in PPPS was seen between the 2 groups at any point in time after the colonoscopy. Furthermore, there was no significant difference in pain sensation between the CO2 and RA groups in patients with IBD. When we investigated the other contributing factors to pain sensation, body-mass index (BMI) was found to be significant at 30 minutes and BMI and colonoscopy time were found to be significant at 6 hours afterwards.

conclusionWe found no favorable effect of CO2 insufflation on PPPS in colonoscopy, including in patients with IBD.

Indexed as

ColonoscopyAbdominal PainAdultAirBody Mass IndexCarbon DioxideFemaleHumansInflammatory Bowel DiseasesInsufflationMaleMiddle AgedOperative TimePain MeasurementProcedural PainProspective StudiesCarbon Dioxide

Identifiers

PMID33169704
PMCPMC7659903
OpenAlexW3097623626

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.