body fluids and amylase?

My father was submitted to the hospital 5 months ago for an anurism connected to his spleen and massive blood loss. He lived and got out of the hospital, but had acute pancreaitis from complications. His blood amylase is perfect but there was a lot of amylase coming from his pancreas. There is a drain at the site of the surgery so it could drain out until it got totally healed, and his amylase count has gotten better and is 500 hundred right now, none being the best because it means its not leaking anymore. There has always been an average of about 20-60 some cc's of fluid coming out.  Since this number has gotten better though there has been more fluid coming out, somewhere around 80 to 100 cc's a day now. Has anyone had a drain in them before? Does this much body fluid come out of a person? HE is not sick, no temperature, eats and sleeps well, and normal stools. Does anybody know anything about body amylase, drain tubes, or body fluid out there? Or if u know anybody u can ask could u please? The doctors give us half *** ansmwers and dont seem to think its a big deal but we do.  Thank you.

                                                       Mike