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. Author manuscript; available in PMC: 2020 Feb 28.
Published in final edited form as: Endoscopy. 2014 May 20;46(7):614–618. doi: 10.1055/s-0034-1365497

Fig.2.

Fig.2

The insufflation capsule has two compartments. In the closed configuration, the magnetic valves form a tight barrier between the compartments. When triggered by an external permanent magnet, the valves open to allow mixture of the two reactants, producing carbon dioxide that is released through exhaust ports along the lining of the lower compartment.