User blog comment:Salubri/Final Fight: Reflections of an Unrealistic and Ridiculous Battle/@comment-44061-20100204225832

Another concern is that if this all took place and holds true like Id hope it does and is not some ploy by Aizen then a simple concern. Did hitsugaya simply stab him in the back? or did he stab him to seal his "Saketsu" and "Hakusui"? I know we have only seen Byakuya doing this (as one of his favorite moves) and Ishida achieving similar upon his first fight to save orihime against the Jibarano's brother. But there are significant differences in the attacks. If the later was performed its more then simple attack it would mean Aizen no longer has access to Shinigami powers, they would be as good as gone. Wishful thinking but its something I noticed.