PROBLEM TO BE SOLVED: To provide a medical capsule capable of extracting body fluid or discharging a liquid chemical without forcing a patient to have strong pains and without requiring large-scale equipment.SOLUTION: The medical capsule which can be swallowed into the body cavity of a living body includes: a pH measuring means for obtaining pH information inside the body cavity, at least one of a body fluid extracting mechanism for extracting the body fluid inside the body cavity and a liquid chemical discharging mechanism for discharging the liquid chemical into the body cavity, and a driving mechanism for operating the body fluid extracting mechanism or the liquid chemical discharging mechanism on the basis of the pH information by the pH measuring means.COPYRIGHT: (C)2009,JPO&INPIT【課題】患者に大きな苦痛を強いることなく、かつ、大がかりな設備を要することなしに、体液採取または薬液放出が可能な医療用カプセルを得る。【解決手段】生体体腔内に飲み込むことが可能な医療用カプセルであって、体腔内のpH情報を得るpH測定手段と、体腔内の体液を採取する体液採取機構及び体腔内に薬液を放出する薬液放出機構の少なくとも一方と、このpH測定手段によるpH情報に基づいて、体液採取機構又は薬液放出機構を動作させる駆動機構とを備える。【選択図】図1
