My second child was in and out of hospital from the age of four months until she was five years old. I lived hundreds of miles from family, and my (then) husband worked away from home for months at a time.
The very worst occasion was when my eldest daughter (aged 6) became ill and needed to be admitted to hospital; my husband was abroad and I had no one else to turn to, being newly arrived in the town, so had to ask the local vicar's wife to come and babysit my youngest daughter (aged 3) who was feeling poorly. As they were doing a lumbar puncture on my eldest daughter the ward sister came hurrying to ask me to take a phone call from the vicar's wife; she was calling to tell me that my youngest daughter had slipped into a coma and the doctor had been called.
At that point I was the loneliest I had ever felt in my life. Believe me, if a grandparent had turned up it would have been manna from heaven.
shirleym I am quite certain that whatever help you can offer will be a lifeline for your daughter and her family. The only word of caution I would offer is to remind you to give yourself a bit of space and time to process your own emotions and to get a little support for yourself too. 
