ENDOSCOPIC INTRODUCTION SHEATH
Publication Date: 2013-Mar-06
The IP.com Prior Art Database
Disclosed herein are embodiments of a medical device including an elongate tubular member including a proximal end, a distal end, and a lumen extending therebetween. The medical device may further include a helical tube extending around an outer surface of the elongate tubular member, wherein the helical tube defines at least one channel therethrough.
ENDOSCOPIC INTRODUCTION SHEATH
Field of the Invention
 The present disclosure relates to endoscopic introduction sheaths. In particular, this application discloses embodiments of an endoscopic introduction sheath having auxiliary passageways, including, but not limited to, a helical tube wrapped around a primary tubular member.
Background of the Invention
 An endoscopic introduction sheath typically includes an elongate, tubular shaft provided with one or more lumens (e.g., working channels) that open at a distal end of the elongate shaft. The lumens may accommodate different devices, including, but not limited to, medical instruments, illumination sources, imaging devices, and/or control elements for guiding the operation of a device or steering the endoscopic introduction sheath. In addition, the lumens may be used to supply suction, irrigation, and/or insufflation gases to a treatment site within a patient. When inserted into a bodily lumen, such as, e.g., a colon, the endoscopic introduction sheath may allow for performing a number of diagnostic and therapeutic procedures, including, but not limited to, observing or recording images from within the body, removing tissue from the wall of the bodily lumen, or deploying certain surgical items such as, e.g., sutures.
 Endoscopic introduction sheaths for use in certain body areas may have highly irregular geometries, which often exhibit a flexibility sufficient to permit the sheath to navigate through such areas without causing injury to the surrounding tissues. However, increased flexibility may destabilize the sheath, where a greater stiffness would, e.g., stabilize the sheath.
 Furthermore, although conventional endoscopic introduction sheaths with a large number of working channels may be versatile, permitting the deployment of many combinations of medical instruments, imaging devices, and/or illumination sources, the diameter of such sheaths may be relatively larger, thereby increasing the risk of injury and increasing the difficulty in moving the sheaths through body lumens to target areas.
SUMMARY OF THE INVENTION
 In accordance with the present disclosure, a medical device may include an elongate tubular member including a proximal end, a distal end, and a lumen extending therebetween. The medical device may also include a helical tube extending around an outer surface of the elongate tubular member, wherein the helical tube defines at least one channel therethrough.
 Various embodiments of the medical device may include one or more of the following features: a steering mechanism for selectively positioning a distal portion of the elongate tubular member; the helical tube may be selectively expandable and collapsible; the helical tube may include two discrete portions, wherein each portion may be configured to be expanded independently of the other portion; the helical tube may be inflatable; an external surface of the helical tube may includ...