Development of a Flexible Cryo-Instrument for Gastrointestinal Endoscopy
Recent advance in therapeutic gastrointestinal endoscopy and cryosurgical techniques have caused an interest in creating a cryo-instrument for endoscopic use. The development of a prototype instrument for use in both upper gastrointestinal endoscopy and colonoscopy is described. This instrument is based on the expansion of high pressure carbon dioxide in a series of flexible tubes designed to fit through a 2.6 mm endoscopic accessory channel. This self-enclosed system has been used clinically for cryo-extraction of cauterized colonic polyps. Its potential use for treatment of gastrointestinal malignancies is discussed.
KeywordsGastrointestinal Endoscopy Accessory Channel Outer Tube Gastrointestinal Malignancy Ethylene Propylene
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- 1.T. D. Wilkes, Fraunfelder, F. T., Principles of cryosurgery, Ophthalmic Surgery 10: 21–30 (1979).Google Scholar
- 4.E. Schoelzel, Langer, S., Cryotherapy of rectal surgery, Helv. Chir. Acta. 48:867–872 (1982).Google Scholar
- 5.S. Langer, H. Peters, K. Schweizer, Cryosurgical treatment of rectal carcinoma, Zentralbi. Chir. 103:991–996 (1978).Google Scholar
- 6.Personal Communication, Fujinon, Inc., Scarsdale, N.Y.Google Scholar
- 7.R. J. Ablin, A. Pugliese, G. Fontana, D. Savoia, P. Guinan, Immunologic considerations, in: “Handbook of Cryosurgery” Richard Ablin, ed., Marcel Dekker, Inc., N.Y. (1980), p. 69.Google Scholar
- 8.L. Grana, R.J. Ablin, S. Goldman, E. Milhouse, Freezing of the esophagus: histological changes and immunological response, Int. Surg. 66:295–301 (1981).Google Scholar