Pcf pq260

Patients underwent colonoscopy with an Elite CF290 endoscopy system (CV-290 and CLV-290, Olympus, Japan) with a 290 series colonoscope (CF-HQ290Z, CF-HQ290, or PCF-H290Z, Olympus, Japan) or a 260 series colonoscope (PCF-PQ260 or CF-H260) and a carbon dioxide (CO
₂) insufflator (UCR CO
₂regulation unit, Olympus, Japan). NBI was available for all the scopes. A flushing pump (OFP-2, Olympus, Japan) was used for the 290 series colonoscope. PCF-H290Z and PCF-PQ260 were used for patients aged 80 years or older, patients aged 70 years or older who had undergone a previous abdominal surgery, and patients likely to experience a difficult insertion due to a colon adhesion found during a previous colonoscopy
9 (link)
. We used an image filing system (T-File System; STS Medic, Japan).

Using a standard endoscope (PCF-Q260AI, PCF-Q260AZI, PCF-PQ260; Olympus, Tokyo, Japan), CS was performed by 5 expert endoscopists, each of whom had performed more than 2,000 colonoscopies. A polyethylene glycol preparation was used as bowel cleansing agent. Depending on the severity, flexible sigmoidoscopy was performed without using bowel cleansing agent to avoid the risk of intestinal perforation. In CS, same way as US, the entire colon was observed and categorized into 7 segments. The severity was scored using the UCEIS, since it has been reported that the UCEIS may correlate with the severity of IMC (Supplementary Table 1) [27 (link)-29 (link)]. All endoscopic findings were evaluated by 3 experienced gastroenterologists (T.K., S.O., and K.S.), each with more than 6 years of CS experience. They were aware of the IMC diagnosis but were blinded to the patient’s clinical information and US findings.