Department of Gastroenterology, Hanyang University College of Medicine, Republic of Korea.
Dig Liver Dis. 2011 May;43(5):391-4. doi: 10.1016/j.dld.2010.12.015. Epub 2011 Feb 21.
Accurate measurement of polyp size during colonoscopy is important; however, visual estimation of polyp size is inaccurate, and it is cumbersome to use additional accessories to measure polyp size whenever polyps are detected.
To evaluate the accuracy and usefulness of graduated devices that can also be used for polypectomy.
The ends of the outer sheath of the injection needles and snares were marked at intervals of 5mm (total 30mm). Four endoscopists measured 53 polyps of 36 patients in the following manner: visual estimation, estimation with biopsy forceps, and measurement with graduated devices. Actual size of all polyps measured through a calliper was used as reference standard.
The difference between actual size and size measured by visual estimation was statistically significant (1.27mm, P<0.001), whilst the differences between actual size and size measured by biopsy forceps (0.06mm, P=1.00) or graduated devices (0.15mm, P=0.620) were not. The linear correlation between the estimates and the actual sizes showed that the graduated device gave the largest positive linear correlation (0.986, P<0.001) of the three measurement methods tested.
The graduated devices are efficient methods when measuring polyp size and performing polypectomy in a single step.
在结肠镜检查中准确测量息肉大小很重要；然而，肉眼估计息肉大小并不准确，而且每当发现息肉时，使用额外的附件来测量息肉大小很繁琐。
评估可用于息肉切除术的刻度装置的准确性和实用性。
将注射针和圈套器的外鞘末端每隔 5mm（共 30mm）标记一次。四位内镜医生以以下方式测量 36 名患者的 53 个息肉：目测、用活检钳估计和用刻度装置测量。所有通过卡尺测量的息肉的实际大小均用作参考标准。
实际大小与目测测量的大小之间存在统计学差异（1.27mm，P<0.001），而实际大小与活检钳测量的大小（0.06mm，P=1.00）或刻度装置测量的大小（0.15mm，P=0.620）之间的差异无统计学意义。估计值与实际大小之间的线性相关性表明，在测试的三种测量方法中，刻度装置给出了最大的正线性相关性（0.986，P<0.001）。
在进行息肉切除的单一步骤中，刻度装置是测量息肉大小的有效方法。
