The Guardian helps with breathing and energy levels after a surgery as well as helping someone get back on their feet after having pancreatic cancer. I just wanted to thank you for the wonderful Guardian machine! I had by-pass surgery on February 27, 2007 and we bought the Guardian in January of 2008. I can tell you that it has already helped my breathing and my energy level is increasing every day! It is a wonderful invention! J.’s mom has pancreatic cancer, and we starting using the Guardian on her three times a day. She was dying before we started the sessions on the Guardian; she was throwing up, she had diarrhea, and she was not eating. Now, she is not throwing up, she is eating again, and she is walking around a little each day. We can tell you that your machine truly works! L.D.