Co-Signers and Quit Claim Deed

i recently purchased a house but needed my parents to co-sign, just to get the loan, they never contributed any money- but their names are on the title as well as mine. my parents have now run into medical and thus financial problems. so my questions are as follows- (1) if they struggle meeting their financial obligations can their creditors go after my house since their name is on the title? and (2) can i use a quit claim deed to have my parents' removed from the title of the house? any help will be greatly appreciated.