| 1 | High-definition colonoscopy with i-Scan:Better diagnosis for small polyps and flat adenomas显示文摘AIM:To investigate if high-definition (HD) colonoscope with i-Scan gave a higher detection rate of mucosal lesions vs standard white-light instruments. METHODS:Data were collected from the computerized database of the endoscopy unit of our tertiary referral center. We retrospectively analyzed 1101 consecutive colonoscopies that were performed over 1 year with standard white-light (n = 849) or HD+ with i-Scan (n = 252) instruments by four endoscopists, in an outpatient setting. Colonoscopy records included patients' main details and family history for colorectal cancer, indication for colonoscopy (screening, diagnostic or surveillance), type of instrument used (standard white-light or HD+ plus i-Scan), name of endoscopist and bowel preparation. Records for each procedure included whether the cecum was reached or not and the reason for failure, complications during or immediately after the procedure, and number, size, location and characteristics of the lesions. Polyps or protrudinglesions were defined as sessile or pedunculated, and nonprotruding lesions were defined according to Paris classification. For each lesion, histological diagnosis was recorded. RESULTS:Eight hundred and forty-nine colonoscopies were carried with the standard white-light video colonoscope and 252 with the HD+ plus i-Scan video colonoscope. The four endoscopists did 264, 300, 276 and 261 procedures, respectively; 21.6%, 24.0%, 21.7% and 24.1% of them with the HD+ plus i-Scan technique. There were no significant differences between the four endoscopists in either the number of procedures done or the proportions of each imaging technique used. Both techniques detected one or more mucosal lesions in 522/1101 procedures (47.4%). The overall number of lesions recognized was 1266; 645 in the right colon and 621 in the left. A significantly higher number of colonoscopies recognized lesions in the HD+ plus i-Scan mode (171/252 = 67.9%) than with the standard white-light technique (408/849 = 48.1%) (P < 0.0001). HD+ with i-Scan colonoscopies identified more lesions than standard white-light imaging (459/252 and 807/849, P < 0.0001), in the right or left colon (mean ± SD, 1.62 ± 1.36 vs 1.33 ± 0.73, P < 0.003 and 1.55 ± 0.98 vs 1.17 ± 0.93, P = 0.033), more lesions < 10 mm (P < 0.0001) or nonprotruding (P < 0.022), and flat polyps (P = 0.04). The cumulative mean number of lesions per procedure detected by the four endoscopists was significantly higher with HD+ with i-Scan than with standard white-light imaging (1.82 ± 2.89vs 0.95 ± 1.35,P < 0.0001). CONCLUSION:HD imaging with i-Scan during the withdrawal phase of colonoscopy significantly increased the detection of colonic mucosal lesions, particularly small and nonprotruding polyps. | Pier Alberto Testoni Chiara Notaristefano Cristian Vailati Milena Di Leo Edi Viale | 2012 | World Journal of Gastroenterology2012，18，37： | 12 |
| 2 | 内镜技术在提高肠道腺瘤检出率中的应用显示文摘结直肠癌(colorectal cancer,CRC)是全球范围内最常见的恶性肿瘤之一,其大多数由腺瘤等癌前病变进展而来.因此,及早发现并切除肠道腺瘤是预防其癌变的关键.目前,结肠镜检查被公认为是诊断和治疗肠道病变的金标准,但常规肠镜检查对病灶有一定漏诊率.Rex等研究表明腺瘤≥1cm时漏诊率为6%,6-9mm时为13%,≤5mm时为27%;并且右半结肠腺瘤的漏诊率要高于左半结肠.肠镜下漏诊腺瘤或恶性肿瘤势必会增加外科手术率和患者死亡率.因此,为了提高肠镜下腺瘤的检出率,国内外的一些学者作了大量的研究工作,并取得了一定的成果.本文就提高内镜下肠道腺瘤检出率的一些技术和方法作一简要综述. | 许吉成 刘冰熔 | 2012 | 世界华人消化杂志2012，20，32： | 10 |
您所在的机构暂未开通此部分的功能，请联系管理员