PROBLEM TO BE SOLVED: To provide a medical device capable of puncturing a puncture part in an appropriate puncture target position with low invasion according to a patients symptom.SOLUTION: A medical device 2 includes: long-sized and flexible body parts 10, 20, and 30 configured so as to be inserted in a living body cavity a first expansion part 11 provided at the tip side of the body parts and capable of being expanded and contracted a second expansion part 32 provided on a base end side of the body parts as compared to the first expansion part 11, capable of being expanded and contracted, and configured so that the distance between the first expansion part 11 and itself is variable and a guide part 50 for guiding a puncture part 3 that can be punctured in a biological tissue to a puncture target region P1 of a body cavity located between the first expansion part 11 that is expanded and deformed, and the second expansion part 32 that is expanded and deformed.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】低侵襲で、かつ患者の症状に応じて適切な穿刺対象位置に穿刺部を穿刺することのできる医療用デバイスを提供する。【解決手段】生体の体腔内に挿入可能に構成された可撓性を備える長尺状の本体部10、20、30と、本体部の先端側に設けられ、拡張及び収縮変形可能な第1拡張部11と、第1拡張部11よりも、本体部の基端側に設けられ、第1拡張部11との間の距離が可変可能に構成された拡張及び収縮変形可能な第2拡張部32と、生体組織に穿刺可能な穿刺部3を、拡張変形した第1拡張部11と拡張変形した第2拡張部32との間に位置する体腔の穿刺対象部位P1へ案内するガイド部50と、を有する医療用デバイス2である。【選択図】図1
