Body-insertable apparatus

A body-insertable apparatus having a storage chamber for storing a medical fluid in a capsule-like casing, the capsule-like casing being configured to be wholly introduced into a subject to discharge the medical fluid to a desired region in the subject, comprising:

• a medical-fluid discharger forming the storage chamber that has, in a state where it stores the medical fluid therein, a contraction force for reducing the volume of itself to discharge the medical fluid;
• wherein the medical-fluid discharger is provided in the casing and discharges the medical fluid using the contraction force;
• an injection needle that projects from the casing by using a physical force generated by the medical-fluid discharger for discharge of the medical fluid, to inject the medical fluid in the storage chamber into the desired region in the subject;
• and
• a discharge controller that controls the start of volume change of the storage chamber by the medical-fluid discharger to start the discharge of the medical fluid;
• wherein the discharge controller controls so as to stop volume reduction of the storage chamber by the medical-fluid discharger, to stop the discharge of the medical fluid and the medical fluid channel includes;
• a first channel connecting to the storage chamber, and
• a second channel connecting to the injection needle,
• the discharge controller controls a connection state of the first channel and the second channel, and
• the medical-fluid discharger starts volume reduction of the storage chamber when the first channel and the second channel are connected to each other, and stops volume reduction of the storage chamber when the first channel and the second channel are closed.

A body-insertable apparatus having a storage chamber for storing a medical fluid in a capsule-like casing, the capsule-like casing being configured to be wholly introduced into a subject to discharge the medical fluid to a desired region in the subject, comprising:

• a medical-fluid discharger forming the storage chamber that has, in a state where it stores the medical fluid therein, a contraction force for reducing the volume of itself to discharge the medical fluid;
• wherein the medical-fluid discharger is provided in the casing and discharges the medical fluid using the contraction force;
• an injection needle that projects from the casing to inject the medical fluid in the storage chamber into the desired region of the subject;
• and
• a discharge starting unit that is provided in the casing, projects the injection needle from the casing, and starts a discharge operation of the medical-fluid discharger;
• wherein the medical-fluid discharger has a medical fluid channel that connects the storage chamber to the injection needle, and
• the discharge starting unit includes a communication adjusting unit that causes a state, in which a pressing force is applied to a part of the medical fluid channel to cut off a communicated state of the medical fluid channel, to be changed to a state, in which the pressing force is reduced to obtain the communicated state, thereby releasing the contraction force and starting the discharge operation of the medical-fluid discharger.

A body-insertable apparatus having a medical fluid and an injection needle in a capsule-like casing, the capsule-like casing being configured to be wholly introduced into a subject to inject the medical fluid to a desired region in the subject, the body-insertable apparatus comprising:

• a medical-fluid discharger forming a storage chamber that has, in a state where it stores the medical fluid therein, a contraction force for reducing the volume of itself to discharge the medical fluid;
• wherein the medical-fluid discharger is provided in the casing and discharges the medical fluid using the contraction force, and projects the injection needle from the casing by using a physical force generated by the medical-fluid discharger;
• and
• an elastic member that generates an elastic force in a direction returning the injection needle into the casing, upon projection of the injection needle, and when the physical force for projecting the injection needle decreases to equal to or less than the elastic force, uses the elastic force to bring the injection needle back to the casing.