Colonoscopy with magnetic control system to navigate the forepart of colonoscope shortens the cecal intubation time

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Colonoscopy is considered the most effective method for diagnosing colorectal diseases, but its application is sometimes limited due to invasiveness, patient intolerance, and the need for sedation.


The aim of this study was to improve the problem of loop formation and shorten the cecal intubation time of colonoscopy by using a magnetic control system (MCS).


Two experienced gastroenterologists, three trainees, and a novice repeated colonoscopy without or with MCS on three colonoscopy training model simulator cases. These cases were divided into introductory (case 2) and challenging levels (cases 4 and 5). The cecal intubation times were recorded.


For all cases, the average cecal intubation times for the experienced gastroenterologists with MCS were significantly shorter than without MCS (case 2: 52.45 vs. 27.65 s, p < 0.001; case 4: 166.7 vs. 120.55 s, p < 0.01; case 5: 130.35 vs. 100.2 s, p < 0.05). Those of the trainees also revealed significantly shorter times with MCS (case 2: 67.27 vs. 51 s, p < 0.01; case 4: 253.27 vs. 170.97 s, p < 0.001; case 5: 144.1 vs. 85.57 s, p < 0.001).


Conducting colonoscopy with MCS is safe and smooth, and shortens the cecal intubation time by navigating the forepart of the colonoscope. In addition, all diagnostic and therapeutic benefits of conventional colonoscopy are retained.

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All the authors have no conflicts of interest or financial ties to disclose.

Author information

Correspondence to Gi-Shih Lien.

Additional information

Chung-Sheng Yang and Fat-Moon Suk contributed equally to this work.

Electronic supplementary material

Below is the link to the electronic supplementary material.

Videotape showing rotatary operation of magnetic control system. Supplementary material 1 (MPG 83612 kb)

Videotape showing colonoscopy with magnetic control system. Supplementary material 2 (MPG 106424 kb)

Videotape showing rotatary operation of magnetic control system. Supplementary material 1 (MPG 83612 kb)

Videotape showing colonoscopy with magnetic control system. Supplementary material 2 (MPG 106424 kb)

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Yang, C., Suk, F., Chen, C. et al. Colonoscopy with magnetic control system to navigate the forepart of colonoscope shortens the cecal intubation time. Surg Endosc 28, 2480–2483 (2014) doi:10.1007/s00464-014-3460-7

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  • Magnet
  • Colonoscopy
  • Cecal intubation time