| 摘要 |
A body-insertable apparatus that can reduce the apparatus size and perform projection operation of an injection needle in a power saving manner is provided. A body-insertable apparatus 1 according to the present invention has a balloon 4 for storing a medical fluid in a capsule-like casing 2, and an injection needle 5 including an elastic membrane 6. The body-insertable apparatus 1 discharges the medical fluid due to contraction of the balloon 4, applies a discharge pressure of the medical fluid to the elastic membrane 6 to expand the elastic membrane 6, and projects the injection needle 5 from the casing 2 due to the expansion of the elastic membrane 6. Further, the body-insertable apparatus 1 has a channel forming unit 11 for forming a channel 11a connecting to the balloon 4 and a channel 11b connecting to the injection needle 5, and a communication adjusting mechanism 12. The communication adjusting mechanism 12 adjusts a communicated state between the channels 11a and 11b, thereby controlling the start of medical-fluid discharge operation by the balloon 4.
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