A lumen passage confirmation device (1) according to the present invention is a lumen passage confirmation device for checking whether or not a capsule medical device introduced into a digestive tract of a subject can pass through an organ to be confirmed of passage. A main body portion (2) made of a material which is dissolved by a substance present in the digestive tract, a covering portion covering the surface of the main body portion (2), and having an outer diameter substantially equal to the lateral direction outer diameter of the capsule medical device And a coating layer (3) made of a material which is dissolved in the substance existing in the digestive tract, wherein ultrasonic waves are scattered on at least a part of any one interface of the luminal passage confirming device (1) Possible irregularities are provided.本発明にかかる管腔通過確認装置(1)は、被検者の消化管内に導入されるカプセル型医療装置が通過確認対象の臓器を通過できるか否かを確認する管腔通過確認装置であって、消化管内に存在する物質によって溶解する材料から成る本体部(2)と、本体部(2)の表面を被覆し、カプセル型医療装置の短手方向の外径と略同等の外径を有し、消化管内に存在する物質によって溶解する材料から成るコーティング層(3)と、を備え、当該管腔通過確認装置(1)のいずれか一つの界面の少なくとも一部に、超音波が散乱可能な凹凸が設けられている。
