What Is Hemodialysis?
When kidney function drops below a critical threshold — a stage called kidney failure or end-stage renal disease — waste products and fluid build up in the blood and become dangerous. Hemodialysis uses a machine and a special filter (a dialyzer) to pull blood out of the body, clean it, and return it, doing outside the body what healthy kidneys would normally do inside it.
Who Needs Hemodialysis?
Your doctor may recommend hemodialysis if you have chronic kidney disease that has progressed to kidney failure, or in some cases of sudden (acute) kidney injury. Signs that dialysis may be needed soon include persistent nausea, swelling, shortness of breath, confusion, or lab results showing dangerously high waste levels in the blood.
What Happens Before Treatment Starts?
Before regular hemodialysis begins, a surgeon creates vascular access — most often a fistula or graft in the arm — that allows blood to be drawn safely and efficiently during each session. This is typically arranged several weeks in advance so it has time to heal and mature.
What Happens During a Session?
- Two small needles are placed at the access site, one to draw blood out and one to return it
- Blood flows through tubing into the dialysis machine, where it passes through the filter
- Cleaned blood is returned to the body while waste and extra fluid are removed
- Vital signs are monitored throughout by the nursing team
Most people read, rest, or watch something during treatment. Mild side effects like low blood pressure, cramping, or fatigue afterward are common and usually manageable.
Everything in One Place
Hospital CMQ coordinates the full picture around dialysis: nephrology consultation, vascular access planning with our surgical team, lab monitoring, and a dedicated dialysis unit — so patients don't have to piece together care between different facilities.
Living With Hemodialysis
Diet and fluid intake usually need adjustment, and your care team will help set limits on sodium, potassium, and phosphorus. Many patients continue working and traveling with planning; our team can help coordinate treatment for visitors who need dialysis while in Puerto Vallarta or the Riviera Nayarit.
Ask our nephrology team about starting, transferring, or scheduling a visiting dialysis session.
References
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK/NIH) — Hemodialysis
- Mayo Clinic — Hemodialysis overview
- National Kidney Foundation — Understanding dialysis
