the next type of dialysis is peritoneal dialysis. we use the lining of the abdominal cavity as a membrane where waste products can leave the body and can go into peritoneal cavity. so the lining of the abdominal cavity, the lining of your abdomen can act as a transport. waste products can go across that and substances can go into your body from that. peritoneal dialysis, the treatment goes into abdomen, fluid is administered into the abdomen and stays there for a while and waste products go from the blood into that fluid and after a period of time the fluid is removed. you have removed increment of waste products and water by the lining of the abdominal cavity acting as a membrane which removes fluid from the blood into clear solution that you have put in and the next slide shows actually an exchange because each one of those is an exchange. that doesn't show too well. in the first picture, fluid is administered into the abdominal cavity and it stays there. usually it will stay there 4 hours to 6 hours. waste products -- i'm sorry. i

it's encouraged these days to do peritoneal dialysis. the next slide shows that peritoneal can be done at night. basically what you have is this patient is sleeping and has a tube coming out of his abdomen and he has a machine which is a large bag on that with fluid that goes into the abdominal cavity and the fluid goes out. this is basically a timer. a very sophisticated and accurate timing device that puts fluid in and out and then the tube the fluid goes out and flesh -- fresh fluid goes in. there is a substantial amount of patients who like peritoneal dialysis who have over night dialysis of this type which is where they don't have to do exchanges during the day. so, the last item that we talked about i have already mentioned most of what's on this slide. no dialysis can be an appropriate choice for particular patients. the kind of patients as i mentioned before would be a patient who has a very bad metastatic cancer and they have a short time left to live but meanwhile their kidneys have given out and many of the symptoms are due to