Expandable device for a body cavity

A device for expansion in a body cavity, the device including at least one casing that is insertable into the body cavity, the at least one casing having a collapsed state and an expanded state, at least one spring device in the at least one casing, the at least one casing being evacuated to define a pressure differential holding the at least one casing in the collapsed state, and in the collapsed state the at least one casing holding the at least one spring device in a stressed state having a stored potential energy, at least one inlet port connected with the at least one casing, the at least one inlet port being sealed to maintain the pressure differential, and a breaker external to the body cavity when the casing is in the body cavity, the breaker connected with the at least one inlet port, the breaker operable to open the at least one inlet port and equalize the pressure differential, whereupon the at least one casing releases the at least one spring device from the stressed state to convert the stored potential energy to kinetic energy that moves the at least one casing from the collapsed state to the expanded state that conforms against sides of the body cavity.

A method comprising:

• providing a device that comprises at least one casing that has a collapsed state and an expanded state, at least one spring device in the at least one casing, the at least one casing is evacuated to define a pressure differential that holds the at least one casing in the collapsed state, and in the collapsed state the at least one casing holds the at least one spring device in a stressed state that has a stored potential energy, at least one inlet port connected with the at least one casing, the at least one inlet port is sealed to maintain the pressure differential, a breaker connected with the at least one inlet port;
• inserting the casing of the device into a body cavity, with the breaker external to the body cavity;
• activating the breaker to open the at least one inlet port and equalize the pressure differential, whereupon the at least one casing releases the at least one spring device from the stressed state to convert the stored potential energy to kinetic energy that moves the at least one casing from the collapsed state to the expanded state that conforms against sides of the body cavity.