Question: I suffer from kidney failure, and I undergo dialysis three times a week, that is, every other day; and in Ramadaan, some of the sufferers from this disease can fast and others can not.
My first question is: Can those who are capable of observing Sawm (Fast) do? Are they obliged to do anything, knowing that some people say that their Sawm is not valid as there are some solutions that enter the body with the blood. Then, if the Sawm is not valid, what is the ruling to be followed? Does one have to compensate for the days he could not fast, or to feed, or do both? And, what is to be done concerning the years in which a person used to observe Sawm while undergoing dialysis?
The second question is: Is it permissible to perform Salah (Prayer) while undergoing dialysis without Wudoo’ (ablution)? And if not, what is to be done if the Thuhr (Noon) and the `Asr (Afternoon) Prayers pass while we are undergoing dialysis, and sometimes we are very tired as a result of the dialysis, and we take a rest till the time of the Maghrib (Sunset) Prayer, so we perform them all together. Is this permissible?
Answer: If delaying the dialysis till the evening during the days of Sawm is not possible, and the patient has to undergo dialysis while observing Sawm, dialysis invalidates the Sawm because, according to what specialists mention, it involves taking the patient’s blood out of his body into a machine and then returning it to the body with some chemicals and nutrients that are added to it, such as sugars and salts, and this invalidates the Sawm. In this case, the patient has to abstain from all that breaks his Sawm for the rest of the day in which he undergoes dialysis, unless it becomes necessary for him to break his Sawm the rest of the day because of his illness… read more here.