Importance

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Abstract

An instrument channel device for receiving a medical instrument having a distal tip includes an elongate tubular shaft including a proximal shaft portion and a distal shaft portion positionable within a body cavity. The shaft defines a lumen for passage of the distal tip of a flexible medical instrument therethrough, allowing positioning of the medical instrument such that its distal tip is disposed distally of the distal shaft portion. A telescoping reinforcement is positioned on the distal shaft portion. The reinforcement has a collapsed position in which the telescoping reinforcement has a length that is shorter than the length of the telescoping reinforcement in an expanded position. As an instrument is advanced from the distal end of the lumen, the telescoping reinforcement is engaged by a distal portion of the instrument such that advancement of the distal tip to a position beyond a distal end of the telescoping reinforcement moves the telescoping reinforcement to the expanded position. The reinforcement minimizes unintended flexion of the portion of the instrument shaft that extends beyond the distal end of the lumen.

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First Claim