I am haunted by a client who had her fingernails grow into her palm because the nurses could not open her tight hemiplegic (paralyzed) hand. Here are tricks that make opening a tight hand easier.
Trick # 1. Using force makes spastic muscles fight harder. The instant you feel resistance slow down so movement is barely visible. Patience pays off.
Trick # 2. Try not to touch the client's palm. This may stimulate the hand to close.
Trick # 3. To open the hand, start by bending the wrist slightly 1st. This is how police get people to open their hand to drop a weapon. Bending the wrist relaxes tendons that cross over the wrist before they go to the ends of your fingers.
Caution: Aim for a small amount of wrist flexion (see angle in photo). As the tendons relax, the fingers will open slightly so you do not have to pull on fingers curled in a tight fist.
Trick # 4. A fist will relax even further if you straighten the thumb. The thumb has half the muscles in the hand so it is a bully. The trick is to wrap several fingers around the base of the client's thumb rather than pulling with the bony ends of your fingers.
Caution: Overstretching the fingers can damage muscles needed for active movement later on (lumbricals and interossei). Always keep the fingers in a straight line with the palm.
DO NOT straighten the fingers like in the photo on the left.
When stretching the wrist, it is better to aim for partial finger extension so muscles will relax instead of fight you. I can get my wrist all the way back now, but I always keep my fingers in line with my palm (see green arrows). homeafterstroke.blogspot.com