christy, There's not much chance his actual records would exist today, although there may be references somewhere.
I've looked for any information on Patrick based on facts you have given on other posts on the forum, and can find no trace of a Patrick Sharkey that could be him, the two Patrick Sharkey I can find, both born Belfast and served in Royal Irish Rifles one died of wounds 1915, and the other killed in action 1914.
Dudley Road Hospital became Southern General Hospital (
my site) in May 1917 so possibly he was injured after that date.
Colin