Device and method for injection, photoactivation and solidifaction of liquid embolic material in the vascular system or other organic cavities

An organic cavity injection method, comprising:

• injecting, using an injection cannula, a photo-activatable substance inside an organic cavity, the photo-activatable substance having a non-activated state and an activated state wherein the photo-activatable substance is solidified by electromagnetic radiation in the activated state, wherein the photo-activatable substance is an inert, biocompatible liquid in the non-activated state;
• simultaneous with injecting a photo-activatable substance inside an organic cavity, controllably removing, with a balloon placed in front of the organic cavity, a resident substance from the organic cavity and preventing flow of the photo-activatable substance that is in the non-activated state from the organic cavity, the balloon being configured for active, on/off control of the flow, the balloon being elastic and configured to surround the injection cannula, and the balloon is configured to have a direction of deformation that is controlled;
• and
• providing electromagnetic radiation, through an optical waveguide inside the injection cannula, inside the organic cavity to the photo-activatable substance to photoactivate the photo-activatable substance and change the photo-activatable substance into the activated state inside the organic cavity;
• wherein the photo-activatable substance comprises a photopolymerizable or photocurable material, and the balloon absorbs or reflects the electromagnetic radiation provided by the optical waveguide inside the organic cavity.

An organic cavity closure apparatus, comprising:

• an injection cannula having a photo-activatable substance and configured for injecting the photo-activatable substance inside an organic cavity, the photo-activatable substance having a first state and a second state, the photoactivatable substance flowing through the injection cannula in the first state;
• at least one element inserted with the injection cannula to control the flow of a resident substance from the organic cavity and simultaneously prevent flow of the photo-activatable substance from the organic cavity, the at least one element being configured for active, on/off control of the flow, at least part of the at least one element being elastic and configured to surround the injection cannula, and the at least one element being configured to have a direction of deformation that is controlled;
• and
• an optical waveguide inside the injection cannula and configured to emit electromagnetic radiation inside the organic cavity to convert the photo-activatable substance to the second state inside the organic cavity while the at least one element prevents flow of the photo-activatable substance from the organic cavity and configured for controlled exchange of the non-activated photo-activatable substance from the organic cavity to a blood vessel,
• wherein, in the second state, the photo-activatable substance is solidified by the electromagnetic radiation inside the organic cavity.