History of the instruments for gastrointestinal endoscopy

Edmonson, James M.

doi:10.1016/s0016-5107(91)70910-3

Cited by 101 publications

(43 citation statements)

References 67 publications

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“…The MagMite, introduced in Ref. 190, has a submillimeter dimension of (0.3 9 0.3 9 0.07 mm 3 ) and consists of two electroplated soft magnets connected by spring, and uses a mechanicalresonant motion for planar locomotion powered by external magnetic fields (flux density 2 mT, kHz frequencies). Speeds of 12.5 mm s -1 have been reported for the prototypes.…”

Section: C Magnetic Microroboticsmentioning

confidence: 99%

“…Speeds of 12.5 mm s -1 have been reported for the prototypes. Alternatively, the Rodbot is a rectangular rod-shaped device (0.3 9 0.06 9 0.05 mm 3 ) that can be magnetized in a transverse direction. 191 It is a surface walker, and rolls along the surface under rotating magnetic fields, and its motion creates a vertical vortex, which can be used to trap and manipulate micro-objects like protein crystals.…”

Section: C Magnetic Microroboticsmentioning

confidence: 99%

“…3 The invention of mechanically flexible, optical fiber endoscopes in 1954 was a key advancing technology for optical screening of the upper and lower human gastrointestinal (GI) tract. 4 However, it was not a complete screening solution, as it could not visualize the small intestine (bowel), a locale for many health disorders.…”

Section: Introduction 1a Historical Developmentmentioning

confidence: 99%

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Magnetically guided capsule endoscopy

et al. 2017

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Wireless capsule endoscopy (WCE) is a powerful tool for medical screening and diagnosis, where a small capsule is swallowed and moved by means of natural peristalsis and gravity through the human gastrointestinal (GI) tract. The camera-integrated capsule allows for visualization of the small intestine, a region which was previously inaccessible to classical flexible endoscopy. As a diagnostic tool, it allows to localize the sources of bleedings in the middle part of the gastrointestinal tract and to identify diseases, such as inflammatory bowel disease (Crohn's disease), polyposis syndrome, and tumors. The screening and diagnostic efficacy of the WCE, especially in the stomach region, is hampered by a variety of technical challenges like the lack of active capsular position and orientation control. Therapeutic functionality is absent in most commercial capsules, due to constraints in capsular volume and energy storage. The possibility of using body-exogenous magnetic fields to guide, orient, power, and operate the capsule and its mechanisms has led to increasing research in Magnetically Guided Capsule Endoscopy (MGCE). This work shortly reviews the history and state-of-art in WCE technology. It highlights the magnetic technologies for advancing diagnostic and therapeutic functionalities of WCE. Not restricting itself to the GI tract, the review further investigates the technological developments in magnetically guided microrobots that can navigate through the various air-and fluid-filled lumina and cavities in the body for minimally invasive medicine.

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Section: C Magnetic Microroboticsmentioning

confidence: 99%

Section: C Magnetic Microroboticsmentioning

confidence: 99%

Section: Introduction 1a Historical Developmentmentioning

confidence: 99%

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Magnetically guided capsule endoscopy

et al. 2017

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“…Medical endoscopy has evolved into various types (e.g., gastroscopy, colonoscopy, bronchoscopy, rhinoscopy, otoscopy, and capsule) depending on specific diagnoses and treatments [1]- [5]. Industrial endoscopes are extensively employed in non-destructive visual inspections of various parts in the aircraft, automobile, and plant industry, including engines, pipes, and turbines [6].…”

Section: Introductionmentioning

confidence: 99%

Ultra-wide-angle Wireless Endoscope with a Backend-camera-controller Architecture

Shim¹,

Yi²

2017

International Journal of Electronics and Telecommunications

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Abstract-This paper presents a wireless endoscope with an ultra-wide FOV (Field of View) of 130° and HD resolution (1280x720 pixels). The proposed endoscope consists of a camera head, cable, camera controller, and wireless handle. The lens module with a 150° degrees AOV (Angle of View) is achieved using the plastic injection-molding process to reduce manufacturing costs. A serial CMOS image sensor using the MIPI (Mobile Industry Processor Interface) CSI-2 (Camera Serial Interface-2) interface physically separates the camera processor from the camera head. The camera head and the cable have a compact structure due to the BCC (Backend-Camera-Controller) architecture. The size of the camera head and the camera controller is 8x8x26 mm and 7x55 mm, respectively. The wireless handle supports a UWB (Ultra-Wide-Band) or a Wi-Fi communication to transmit video data. The UWB link supports a maximum data transfer rate of ~37 Mbps to transmit video data with a resolution of 1280x720 pixels at a frame rate of 30 fps in the MJPEG (Motion JPEG) format. Although the Wi-Fi link provides a lower data transfer rate (~8 Mbps Max.), it has the advantage of flexible interoperability with various mobile devices. The latency of the UWB link is measured to be ~0.1 sec. The Wi-Fi link has a larger latency (~0.5 sec) due to its lower data transfer rate. The proposed endoscope demonstrates the feasibility of a high-performance yet low-cost wireless endoscope using the BCC architecture. To the best of the author's knowledge, the proposed endoscope has the largest FOV among all presently existing wireless endoscopes.

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“…1 The use of intravenous lignocaine has renewed interest among surgeons as it decreases pain and furthermore it expedites the return of bowel activity. 2 This study was undertaken to compare the effects of intravenous lignocaine, intraperitoneal lignocaine and a combination of both for pain relief and bowel recovery following laparoscopic cholecystectomy.…”

Section: Introductionmentioning

confidence: 99%