I don't personally know Mitchell, but was asked to request prayers for him since prayers for me were so successful.
Now, I have a link to a web-site that tells more about him. I find it helpful to have a face and understanding around the person I pray for. I think this will open your heart to this young man and his medical journey. Certainly prayers for his parents and family are critical also.
http://www.caringbridge.org/visit/mitchelllouie
Click on this and then check out his journal. Read his essay, "What is the purpose of life?" written on the night before his emergency surgery. Your heart will be as wet as the day outside.