A preliminary prospective study of the usefulness of a magnetic endoscope locating device during colonoscopy

Ambardar, S.; Arnell, Tracy; Whelan, Richard L.; Nihalani, A.; Forde, Kenneth A.

doi:10.1007/s00464-004-8948-0

Cited by 12 publications

(14 citation statements)

References 18 publications

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“…The need for accurate preoperative localization of the tumor has triggered the development of different endoscopic techniques to facilitate further tumor identification at the time of surgery, including the use of clips [3–5] and peritumoral submucosal tattooing [6–9]. More recently, the use of new technologies such as the “Scope Guide” or “magnetic endoscopic imaging” has been proposed to identify the position of the endoscope in the colon [10–12], thereby facilitating lesion location detection. The electromagnetic imaging system has been introduced as an aid to colonoscopy and reveals a great potential for assisting endoscopists without exposing patients or medical staff to radiation.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of preoperative tumor localization in large bowel using 3D magnetic endoscopic imaging: randomized clinical trial

et al. 2016

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BackgroundLaparoscopic surgery has become the standard treatment for colorectal cancer. A tumor that does not involve serosa is invisible intraoperatively, and manual palpation of the tumor during laparoscopy is not possible. Therefore, accurate localization of the neoplastic infiltrate remains one of the most important tasks prior to elective laparoscopic surgery. The aim of this study was to evaluate the utility of a magnetic endoscopic imaging (MEI) for precise preoperative endoscopic localization of neoplastic infiltrate within the large bowel.Materials and methodsThe study enrolled 246 patients who underwent elective surgery for colorectal cancer in 2012–2015 with accurate preoperative colonoscopic localization of the tumor. The analysis concerned patients with neoplastic infiltrate localized more than 30 cm from the anal verge. For evaluative purposes and accuracy of localization, the intestine was divided anatomically into 13 parts. Colonoscopic examinations were conducted with two types of endoscopes: group I—with MEI and group II—without MEI. Patients were assigned to the groups by random allocation. Ultimate confirmation of the tumor localization was accomplished by intraoperative evaluation.ResultsGroup I involved 127 patients and group II 129. The two groups were compared in terms of age, sex, BMI and frequency of previous abdominal procedures. Proper localization of the lesion was confirmed in 95.23 % of group I patients and in 83.19 % of group II patients (p < 0.05). The greatest discrepancy in localization occurred in 8.9 % of patients from group I and 20 % of patients from group II in which the lesion was assessed primarily in the distal sigmoid.ConclusionsA magnetic endoscopic imaging allows more accurate localization of neoplastic infiltrate within the large intestine compared to standard colonoscopy alone, especially within the sigmoid colon. This method can be particularly useful in planning and performing laparoscopic procedures to diminish the likelihood of improper bowel segment resection.ClinicalTrials.gov numberNCT01688557Electronic supplementary materialThe online version of this article (doi:10.1007/s00464-016-5203-4) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Accuracy of preoperative tumor localization in large bowel using 3D magnetic endoscopic imaging: randomized clinical trial

et al. 2016

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“…The need of an accurate preoperative localization of the tumor has brought the development of different endoscopic techniques in order to facilitate further tumor identification at the time of surgery, including the use of clips (21)(22)(23) and peritumoral submucosal tattooing (1,22,(24)(25)(26). More recently, the use of new technologies as the "scope guide" or "magnetic endoscopic imaging" has been proposed in order to identify the position of the endoscope in the colon (5,21,27), therefore facilitating detected lesions location. Besides endoscopy, other procedures can help in the localization of CRC.…”

Section: Discussionmentioning

confidence: 99%

Endoscopic localization of colorectal cancer: Study of its accuracy and possible error factors

Borda

Jiménez

Borda

et al. 2012

Rev. esp. enferm. dig.

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Introduction: accurate preoperative localization of colorectal cancer (CRC) is very important, with a wide range of published error rates.Aims: to determine accuracy of endoscopic localization of CRC in comparison with preoperative computed tomography (CT). To analyse variables that could be associated with a wrong endoscopic localization.Patients and methods: endoscopic and CT localization of a series of CRC without previous surgery were reviewed. We studied the concordance between endoscopic and radiologic localization against operative findings comparing accuracy of endoscopy and CT. We analysed the frequency of wrong endoscopic diagnoses with regard to a series of patient, endoscopy and tumor variables.Results: two hundred thirty seven CRC in 223 patients were studied. Concordance with surgical localization was: colonoscopy = 0.87 and CT = 0.69. Endoscopic localization accuracy was: 91.1%; CT: 76.2%: p = 0.00001; OR = 3.22 (1.82-5.72). Obstructive cancer presented a higher rate of wrong localization: 18 vs. 5.7% in non-obstructive tumors (p = 0.0034; OR = 3.65 (1.35-9.96). Endoscopic localization mistakes varied depending on tumor location, being more frequent in descending colon: 36.3%, p = 0.014; p = 0.007;.Conclusions: endoscopic accuracy for CRC localization was very high and significantly better than CT accuracy. Obstructive tumor and those located in the descending colon or cecum were associated with a significant increase of the error risk of CRC endoscopic localization.

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“…Last but not least, correct localization of pathological findings is very important when surgery is needed or for follow-up examinations. It has been shown that the real-time view of the endoscope is highly accurate in estimating lesion location [11].…”

Section: Discussionmentioning

confidence: 99%

“…Fluoroscopy and magnetic endoscopic imaging systems are able to provide physicians with information regarding scope shape. However, they are limited by cost, cumbersome hardware, and the risk to both patient and staff of ionizing radiation [9][10][11][12][13][14][15][16][17][18]. In this study we evaluated the in vitro mapping capabilities of the NeoGuide Endoscopy System in terms of colonic looping, insertion depth, tip position, and tip angle formation.…”

mentioning

confidence: 99%

Determining scope position during colonoscopy without use of ionizing radiation or magnetic imaging: the enhanced mapping ability of the NeoGuide Endoscopy System

et al. 2010

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A preliminary prospective study of the usefulness of a magnetic endoscope locating device during colonoscopy

Abstract: The EPDU was accurate in estimating lesion location. The device also holds promise as an aid in the completion of difficult exams (about 30% of cases in this study).

Cited by 12 publications

References 18 publications

Accuracy of preoperative tumor localization in large bowel using 3D magnetic endoscopic imaging: randomized clinical trial

Accuracy of preoperative tumor localization in large bowel using 3D magnetic endoscopic imaging: randomized clinical trial

Endoscopic localization of colorectal cancer: Study of its accuracy and possible error factors

Determining scope position during colonoscopy without use of ionizing radiation or magnetic imaging: the enhanced mapping ability of the NeoGuide Endoscopy System

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