Technical Brief

Design of Dividable Colonoscope Sheath1

[+] Author and Article Information
Hussein Al-Jebur

Department of Mechanical Engineering,
Ohio University,
259 Stocker Center,
Athens, OH 45701

Choi JungHun

Department of Mechanical Engineering and
Biomedical Engineering Program,
Ohio University,
254 Stocker Center,
Athens, OH 45701
e-mail: choij1@ohio.edu

Accepted and presented at the Design of Medical Devices Conference (DMD2014), Minneapolis, MN, April 7–10, 2014.

Manuscript received February 21, 2014; final manuscript received March 3, 2014; published online July 21, 2014. Editor: Arthur G. Erdman.

J. Med. Devices 8(3), 030955 (Jul 21, 2014) (2 pages) Paper No: MED-14-1129; doi: 10.1115/1.4027123 History: Received February 21, 2014; Revised March 03, 2014

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Topics: Design
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Brigitte, M., Max, S., Juergen, H., Peter, M., Bernd, K., and Eckhart Georg, H., 1999, “Disposable-Sheath, Flexible Gastroscope System Versus Standard Gastroscopes: A Prospective, Randomized Trial,” Gastrointest. Endosc., 50(4), pp. 461–467. [CrossRef] [PubMed]
Colt, H. G., Beamis, J. F., Harrell, J. H., and Mathur, P. M., 2000, “Novel Flexible Bronchoscope and Single-Use Disposable-Sheath Endoscope System,” Chest, 118(1), pp. 183–187. [CrossRef] [PubMed]
Kubo, S., Kikawada, T., Hasegawa, H., Tominaga, S., and Yoshimine, T., 2005, “Irrigation-Suction Straw Sheath System for a Rigid Endoscope During Endonasal Endoscopic Pituitary Surgery,” Minim. Invasive Neurosurg., 48(6), pp. 373–375. [CrossRef] [PubMed]
Kimuli, M., and Lloyd, S., 2007, “Out-Patient Flexible Cystoscopy Using a Disposable Slide-On™ Endosheath System,” Ann. R. Coll. Surg. Engl., 89(4), pp. 426–430. [CrossRef]
Litten, J., Choi, J., and Drozek, D., 2011, “Development of an Automatic Adjustable Colonoscope,” ASME J. Med. Dev., 5(4), p. 044502. [CrossRef]
Choi, J., and Drozek, D., 2011, “Development of a Colonoscope Sheath Device for Colonoscopy,” ASME J. Med. Dev., 5(3), p. 031005. [CrossRef]


Grahic Jump Location
Fig. 3

The mechanism of loosening and stiffening of the dividable base where the four hands and the gear of the mechanism and the teeth of the stiffness and the dimensions are in mm

Grahic Jump Location
Fig. 4

The stiffness test for the first model of the colonoscope sheath and the test done between the tensile force on the base of the first model and the bending force on the insertion part at 10, 20, 30, and 40 cm from the base

Grahic Jump Location
Fig. 2

The developed mechanism of the segment, where two chambering ends and four gaps and five holes for the tendons, four of them for the fixation, and one for the mechanism, and how the mechanism fixed on the half cylinders

Grahic Jump Location
Fig. 1

Segment of the colonoscope sheath and the four holes for passing the tendons, the gaps for eliminating the friction of the tendons with the next segment, and the chambering ends for fluent sliding of the segment on each other



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