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The kidneys remove metabolic waste from the blood and help regulate fluid and electrolyte balance. They also contribute to calcium and phosphate regulation, as described in the NIDDK’s information on mineral and bone balance. When kidney function deteriorates, waste, fluid and electrolyte disturbances can develop. Fluid retention and swelling can be among the consequences, and severe kidney failure can threaten life.
Dialysis as kidney replacement treatment
The original article associates the development of dialysis equipment with the second half of the twentieth century, followed by the introduction of dedicated treatment chairs. Equipment and long-term treatment did expand during that period, but the clinical history began earlier. Fresenius Medical Care’s history of dialysis describes successful treatment with Kolff’s artificial kidney in the 1940s, before the later expansion of chronic dialysis programmes.
Dialysis supports people whose kidneys cannot adequately remove waste and excess fluid. It can improve symptoms and support continued daily life, but it does not restore every kidney function or guarantee a normal metabolic state. Ongoing treatment and monitoring are often needed. The source identifies two main forms:
- Haemodialysis.
- Peritoneal dialysis.
Both are forms of kidney replacement therapy used in appropriate circumstances for acute or chronic kidney failure. The choice and timing belong to the renal team. In acute kidney injury, dialysis may be temporary while the kidneys recover, as the NHS’s acute kidney injury information explains.
How the equipment works
In haemodialysis, blood passes through an external filter called a dialyser. Its membrane separates the blood and dialysis-fluid compartments, allowing selected waste substances and excess fluid to be removed while blood is returned to the patient. This is the source’s two-compartment description of the filter; it should not suggest that dialysis removes every unwanted substance or reproduces all kidney functions.
The original article gives approximately 3–5 hours as a treatment-session example. Actual duration is prescribed individually. A suitable chair or treatment bed helps support the patient during this time. An electrically adjustable chair can make positioning easier, but it is not automatically the most comfortable choice for every person.
Vascular access for haemodialysis may be an arteriovenous fistula, an arteriovenous graft or a suitable venous catheter. A graft is not simply an “artificial vein”, and this access is used to circulate blood through the dialysis circuit, rather than to perform a blood transfusion. The NIDDK’s haemodialysis explanation describes the filter, access options and different treatment schedules.
Peritoneal dialysis works differently: the peritoneum, the lining of the abdomen, provides the exchange surface between the blood and dialysis solution placed in the abdominal cavity through a catheter. Waste and excess fluid pass into the solution, which is subsequently drained. The solution is called dialysate; it is not itself a dialyser. Its prescribed composition and osmotic properties are important, so describing every solution simply as isotonic is inaccurate.
The source gives about two weeks between catheter insertion and starting treatment as a preparation example. This is not a universal waiting rule: planned catheter healing and any need for an earlier start must be managed by the renal team. The NIDDK’s peritoneal dialysis information explains catheter preparation and the differences between manual exchanges and machine-assisted treatment.
Why a suitable treatment chair matters
Dialysis is an established treatment, but the experience can involve prolonged sessions and continuing care. The source’s three-times-a-week schedule is a common haemodialysis pattern, not a schedule for every form of dialysis. Haemodialysis may be provided in a centre, hospital or appropriately organised home programme. Peritoneal dialysis follows a different prescribed exchange schedule, commonly carried out each day. Home treatment requires suitable training, equipment and clinical support.
A well-chosen chair can make long sessions more manageable by supporting a comfortable position. The original article reports favourable clinicians’ opinions and describes patients relaxing, resting or distracting themselves during treatment. These are comfort observations, not evidence that every clinician endorses every chair or that furniture eliminates the burdens of dialysis. An uncomfortable position can make several hours difficult, so the person’s comfort should be assessed rather than assumed from reviews.
The source describes adjustable sections and seat height, moderately soft upholstery, surfaces intended for hygienic use and convenient armrests. It also mentions environmentally friendly materials. Features and material claims need checking against the actual product documentation; cleaning and disinfection must follow its instructions.
For a concrete equipment example, Fresenius Medical Care’s SILOVO brochure describes particular powered section and height adjustments, upholstery options and surfaces intended to facilitate cleaning. Configurations differ, so these details are not specifications for all dialysis chairs. Some treatment chairs are also used for blood sampling where their intended use and configuration permit. A person may rest or sleep comfortably, while the clinical team continues the required observation and ensures that the position is suitable for treatment.
Haemodialysis and peritoneal dialysis replace part of kidney function and may help people feel better; they do not cure kidney failure. Dialysis can support someone awaiting a kidney transplant, or remain their longer-term treatment. The source describes transplantation as a complex, costly undertaking with possible waiting times. Access, funding and suitability vary. The NIDDK’s transplant information makes clear that transplantation is also treatment rather than a cure: it is not suitable for everyone, and continuing medicines and follow-up are necessary.
Source: Zaplata: Dialysis Equipment: Haemodialysis and Peritoneal Dialysis. Russian article on MEDICTUR.
