wow you are so delusional. Neji damaged his organs when he inserted chakra into his mouth, but even then, his curse seal remained activated.Yeah because Neji shot gentle fist into his mouth and through the inside of his entire body. So he was dying, if you are dying and your body is shutting down then you will not be channeling chakra. Seal is chakra itself, it will open on command because it has chakra there.
No, Kidomaru comments that he is unable to channel chakra after Neji hit him, while his curse seal faded away. it has nothing to do with him dying. It has everything to do with Neji hitting his tenektsu.