My dad is on an IV....

My dad has just been sent home from a 4 month stay in the hospital. He's now on home health care, but not by a paid nurse...by my mother. He's on an IV and a feeding tube. They gave us a very limited supply of sodium chloride seeing as how he needs it for the IV and to clean out the feeding tube...so I was wondering if anybody can tell me how to make 0.9% sodium chloride. We need it to hold us over until his next check up date at the hospital when they will give us some more. Any help whatsoever will be VERY much appreciated!! Thanks so much!