scholarly journals Deep Learning-Based Automatic Detection of Rectal Polyps Using Abdominal CT Images Guided by Cold Snare Polypectomy

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Haijun Lin ◽  
Qi Chen ◽  
Caijuan Li ◽  
Aifen Zheng ◽  
Lei Yang ◽  
...  
Keyword(s):  
Ct Images ◽  
Complete Resection ◽  
Resection Rate ◽  
Abdominal Ct ◽  
Blank Group ◽  
Rectal Polyps ◽  
Cold Snare Polypectomy ◽  
Deep Cnn ◽  
Experimental Group ◽  
Snare Polypectomy

The study drew attention to the therapeutic effects of cold snare polypectomy guided by a deep convolutional neural network- (CNN-) based abdominal CT and hot snare polypectomy (HSP) on colonic and rectal polyps. Specifically, 90 patients were enrolled into a blank group, a control (Ctrl) group, and an experimental group. The blank group accepted HSP, the Ctrl accepted cold snare polypectomy, and the experimental group accepted cold snare polypectomy guided by deep CNN-based CT images. It was found that the experimental group had the lowest false-positive rate (9.2%) in polyp detection in contrast with the Ctrl (21.4%) and the blank group (52.3%) P < 0.05 . The complete resection rate of large polyps in the experimental group was the highest P < 0.05 , and its operation time (2.91 ± 0.75 min) was obviously shorter versus the blank group (6.18 ± 1.19 min) P < 0.05 . In conclusion, the cold snare polypectomy under the guidance of deep CNN-based CT has a relatively high complete resection rate and detection accuracy of polyps with a low complication rate, which can be adopted clinically.

Efficacy and safety of cold vs hot snare polypectomy for small (5-9 mm) colorectal polyps: a multicenter randomized controlled trial

Endoscopy ◽  
2020 ◽  
Author(s):  
Marina De Benito Sanz ◽  
Luis Hernández ◽  
M Isabel García-Martínez ◽  
Pilar Diez Redondo ◽  
Diana Joao Matías ◽  
...  
Keyword(s):  
Abdominal Pain ◽  
Controlled Trial ◽  
Normal Mucosa ◽  
Colorectal Polyps ◽  
Complete Resection ◽  
Asymptomatic Patients ◽  
Delayed Hemorrhage ◽  
Multicenter Randomized Controlled Trial ◽  
Cold Snare Polypectomy ◽  
Snare Polypectomy

Background and aims: Currently available resection techniques for small polyps include cold snare polypectomy (CSP) and hot snare polypectomy (HSP). We aimed to compare CSP vs HSP in 5-9 mm polyps in terms of complete resection and adverse events rates. Methods: Multicenter, randomized trial conducted in 7 Spanish centers between February-November 2019. Patients with ≥1 5-9mm polyp were randomized to CSP or HSP, regardless of morphology or pit pattern. After polyp removal, two marginal biopsies were submitted to a single pathologist blind to polyp histology. Complete resection was defined as the only finding of normal mucosa or burn artifacts in the biopsies. Abdominal pain was only assessed in patients without <5mm or >9mm polyps. Results: A total of 496 subjects were randomized; 237 (394 polyps) to CSP and 259 (397 polyps) to HSP. Complete polypectomy rates were 92.5% with CSP and 94% with HSP (difference 1.5%, 95%CI: 4.9% to -1.9%). Intraprocedural bleeding appeared in 3 (0.8%) CSPs and 7 (1.8%) HSPs (p=0.34). One (0.3%) lesion per group presented delayed hemorrhage. Post-colonoscopy abdominal pain presented similarly in both groups 1 hour after the procedure (18.8% in CSP vs 18.4% in HSP), but, after 5 hours, it was higher in HSP group (5.9% vs 16,5%, p=0.02). CSP presented a higher proportion of asymptomatic patients 24h after the procedure than HSP, 97% vs 86.4% (p=0.01). Conclusions: We observed no differences in complete resection and bleeding rates between CSP and HSP. CSP reduces the intensity and duration of post-colonoscopy abdominal pain (ClinicalTrials.gov number: NCT03783156).

scholarly journals Extended cold snare polypectomy for small colorectal polyps increases the R0 resection rate

2018 ◽  
Vol 06 (02) ◽  
pp. E254-E258 ◽  
Author(s):  
Yasuhiro Abe ◽  
Haruaki Nabeta ◽  
Ryota Koyanagi ◽  
Taro Nakamichi ◽  
Hayato Hirashima ◽  
...  
Keyword(s):  
Confidence Interval ◽  
Colorectal Polyps ◽  
R0 Resection ◽  
Low Grade ◽  
Resection Rate ◽  
Delayed Bleeding ◽  
Mean Size ◽  
Cold Snare Polypectomy ◽  
Baseline Characteristics ◽  
Snare Polypectomy

Abstract Background and study aims Despite widespread use of cold snare polypectomy (CSP), the R0 resection rate is not well documented. We perform extended CSP, resecting polyps with a > 1 mm circumferential margin. The aim of this study is to compare the R0 resection rate of extended CSP with conventional CSP and to assess safety. Patients and methods From April 2014 to September 2016, 712 non-pedunculated colorectal polyps, < 10 mm in size, resected using CSP from 316 patients were retrospectively analyzed. Results We divided lesions into conventional CSP (n = 263) and extended CSP groups (n = 449). The baseline characteristics of these two groups were not significantly different in univariate or multivariate analyses. Sessile polyps comprised 94 % (668/712), and the remaining were flat-elevated polyps. Mean size of polyps (±standard deviation) was 4.2 ± 1.5 mm. The most frequent pathology was low grade adenoma (97 %, 689/712). The R0 resection rate was significantly higher in the extended CSP group (439/449 [98 %]) than in the conventional CSP group (222/263 [84 %], P < 0.001). There was no delayed bleeding or perforation in either group (conventional CSP group, 0/263, 95 % confidence interval: 0.0 – 1.4 % and extended CSP group, 0/449, 95 % confidence interval: 0.0 – 0.8 %). Conclusions Extended CSP results in a higher R0 resection rate compared with conventional CSP. Extended CSP did not result in a higher rate of delayed bleeding or perforation. Extended CSP is a safe and promising procedure for endoscopic resection of non-pedunculated colorectal polyps < 10 mm in size

scholarly journals A comparison of the resection rate for cold and hot snare polypectomy for 4–9 mm colorectal polyps: a multicentre randomised controlled trial (CRESCENT study)

Gut ◽  
2017 ◽  
Vol 67 (11) ◽  
pp. 1950-1957 ◽  
Author(s):  
Takuji Kawamura ◽  
Yoji Takeuchi ◽  
Satoshi Asai ◽  
Isao Yokota ◽  
Eisuke Akamine ◽  
...  
Keyword(s):  
Controlled Trial ◽  
Postoperative Bleeding ◽  
Complete Removal ◽  
Colorectal Polyps ◽  
Complete Resection ◽  
Adenomatous Polyps ◽  
Resection Rate ◽  
Complete Resection Rate ◽  
Randomised Controlled ◽  
Snare Polypectomy

ObjectiveTo investigate the success rate of cold snare polypectomy (CSP) for complete resection of 4–9 mm colorectal adenomatous polyps compared with that of hot snare polypectomy (HSP).DesignA prospective, multicentre, randomised controlled, parallel, non-inferiority trial conducted in 12 Japanese endoscopy units. Endoscopically diagnosed sessile adenomatous polyps, 4–9 mm in size, were randomly assigned to the CSP or HSP group. After complete removal of the polyp using the allocated technique, biopsy specimens from the resection margin after polypectomy were obtained. The primary endpoint was the complete resection rate, defined as no evidence of adenomatous tissue in the biopsied specimens, among all pathologically confirmed adenomatous polyps.ResultsA total of 796 eligible polyps were detected in 538 of 912 patients screened for eligibility between September 2015 and August 2016. The complete resection rate for CSP was 98.2% compared with 97.4% for HSP. The non-inferiority of CSP for complete resection compared with HSP was confirmed by the +0.8% (90% CI −1.0 to 2.7) complete resection rate (non-inferiority p<0.0001). Postoperative bleeding requiring endoscopic haemostasis occurred only in the HSP group (0.5%, 2 of 402 polyps).ConclusionsThe complete resection rate for CSP is not inferior to that for HSP. CSP can be one of the standard techniques for 4–9 mm colorectal polyps. (Study registration: UMIN000018328)

scholarly journals Tu1024 COLD SNARE POLYPECTOMY COMPARED TO JUMBO FORCEPS POLYPECTOMY FOR COMPLETE RESECTION OF DIMINUTIVE COLORECTAL POLYPS

2020 ◽  
Vol 91 (6) ◽  
pp. AB507-AB508
Author(s):  
Joshua E. Melson ◽  
Jason Kramer ◽  
bana Alajati ◽  
Michael D. Brown ◽  
John Losurdo ◽  
...  
Keyword(s):  
Colorectal Polyps ◽  
Complete Resection ◽  
Cold Snare Polypectomy ◽  
Snare Polypectomy

Incomplete resection rate of cold snare polypectomy: a prospective single-arm observational study

Endoscopy ◽  
2017 ◽  
Vol 49 (03) ◽  
pp. 251-257 ◽  
Author(s):  
Noriko Matsuura ◽  
Yoji Takeuchi ◽  
Takeshi Yamashina ◽  
Takashi Ito ◽  
Kenji Aoi ◽  
...  
Keyword(s):  
Observational Study ◽  
Incomplete Resection ◽  
Resection Rate ◽  
Cold Snare Polypectomy ◽  
Snare Polypectomy
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