Home Hemodialysis and Peritoneal Dialysis
- National Kidney Foundation has divided kidney disease in five different stages reflecting progressively higher severity of loss of kidney function. According to the latest USRDS data, moderate to severe kidney disease (stages III through V) is present in nearly 8-10% of US population. More than half a million patients in USA suffer from stage V CKD commonly referred to as Renal Failure (or End Stage Renal Disease (ESRD)) with nearly similar number of patients suffering with the pre-dialysis, stage IV CKD. The management of ESRD involves either replacement of the lost kidney function through the kidney transplantation, or clearing body of the accumulating toxins through maintenance dialysis. Unfortunately, kidney transplantation is not a viable option for a majority of ESRD patients due to a limited availability of donor organs, further compounded by the fact that many of the dialysis patients are medically unsuitable for transplantation. Thus, maintenance dialysis forms mainstay of the treatment for this large majority of the ESRD patients.
- There are mainly three different forms of maintenance dialysis in existence today.
- Hemodialysis: Where blood is taken out of the body through a complex set of tubes, run through a filter called dialyzer, cleaned off various impurities, and returned back to the patient. During its passage through the filter, the blood comes in contact with dialysate, which mirrors the body fluid except for the presence of impurities. This is conventionally performed in dialysis centers across various medical and commercial facilities and typically involves patients receiving dialysis three times a week (either on Monday, Wednesday and Friday OR Tuesday, Thursday and Saturday) with four hour session each time. This is a relatively complex form of dialysis with rigid treatment structure and limited flexibility in terms of patients’ time, mobility and transportation. Additionally, this involves creation and maintenance of vascular access such as dialysis catheter or creation of AV fistula or graft, in either arm or groin to access high flows of blood needed to perform dialysis.
- Home Hemodialysis (HHD): Advances in dialysis technologies in recent times has highly simplified the above-mentioned form of hemodialysis allowing it to be performed in the comforts of patients’ home. Development of smaller dialysis machine that can be placed on a nightstand; and simpler blood tubing and dialyzer connections, has resulted in increasing number of patients choosing this modality of dialysis to preserve their independence and high functional status. Though the typical duration for individual patient varies, these form of dialysis can be tailored for an individual’s needs with 5-6 times a week frequency for dialysis with each individual session duration ranging from 3-6 hours. The shorter versions called short daily hemodialysis (SDHD) whereas the longer versions are typically performed at night and thus called nocturnal hemodialysis (NHD). The typical home hemodialysis allows a much higher clearance compared to other forms of dialysis and thus gives greater freedom in terms of dietary restriction and life style choices.
- Peritoneal Dialysis (PD): This has been argued as one of the simplest form of dialysis with limited life style interruptions and high degree of freedom. In this form of dialysis a synthetic tube is placed in the abdominal cavity which then allows dialysis by exchange of dialysis fluid at regular intervals. It can be tailored to individual needs so that the patient can perform this at night while asleep with the help of a small machine called “Cycler” or during daytime by performing around four manual exchanges, each lasting around 15-30 minutes. Because of its simplicity, PD is many times a chosen modality for persons with busy lifestyle, active family responsibilities and significant time constraints.
- It is uniformly agreed that no single type of dialysis (home Vs In-center dialysis, or Hemo Vs peritoneal dialysis) is superior to others in terms of hard clinical endpoints e.g. mortality or cardiovascular deaths. However, home dialysis modalities (both PD and HHD) provide significant advantages in multiple outcome parameters important to the management of patients with ESRD namely quality of life, freedom of travel, greater liberty from dietary restrictions, preservation of residual kidney function etc.
- Historically analyses of various patient cohorts in US have consistently revealed that; a privileged patient cohort more frequently chooses a home dialysis. This in many circumstances have been reflected by higher use of peritoneal dialysis in patients that are Caucasians, patients with higher education, patient under the care of nephrologists during the pre-ESRD period, patients receiving pre-dialysis education etc. In fact, nearly half of the patients when provided with a comprehensive pre-dialysis education (CPE) opt for home dialysis. Additionally both individual kidney physician surveys and recommendations of various professional medical societies now recommend a higher utilization of home dialysis. Despite these, only a minority of ESRD patients in US are on Home dialysis modalities. Lack of patient awareness due to lack of predialysis education and scarcity of medical experts performing the home dialysis therapies are the two principle reasons for this underutilization of Home dialysis therapies.
- Considering these facts, University of Florida and DCI have established a specialized clinic and education set up where a comprehensive pre-dialysis education (CPE) will be provided to the patients with stage IV (pre-dialysis) CKD along with their multispecialty care for various ailments of CKD. This clinic will put a special emphasis on the comprehensive care of CKD patients with special attention towards their dietary needs, their social and pharmacological concerns and their awareness and needs for decision making for their eventual dialytic or transplant therapies.
The pros and cons of various forms of currently available dialysis therapies:
|In Center Hemodialysis||