/n Going to Dialysis Is Like Going Into the Unknown

Going to Dialysis Is Like
Going Into the Unknown

Hemodialysis extends life for patients with kidney failure, but each treatment carries irreducible risks that cannot be fully eliminated by protocols, technology, or staff vigilance. Unlike a one‑time surgery, dialysis exposes patients to repeated, high‑volume contact with water, machines, and physiologic stress 156 times per year.

1. The water is a “universal” hazard we can’t see

Every session uses 120‑200 L of purified water across a semipermeable membrane. Biofilm forms in every water system and is “very hard to remove once established”. It sheds bacteria and endotoxin intermittently. Studies worldwide show 9‑35% of water samples and 11‑19% of dialysate samples still exceed AAMI safety limits, even in compliant units. Outbreaks of pyrogenic reactions and Gram‑negative bloodstream infections have been documented from 1973‑2021 in the US, Canada, Israel, and other countries, despite monthly testing.

2. Testing cannot guarantee today’s safety

AAMI requires monthly culture and LAL endotoxin tests. But a normal result yesterday only reflects the moment of sampling. Biofilm can slough and cause an endotoxin spike hours later. 55.5% of samples in a 2026 Iraq surveillance study exceeded 0.03 EU/mL, with seasonal peaks. This means a patient can have chills/fever today even if yesterday’s test was “passing”.

3. Chemical accidents still occur

1960‑2007: 217 cases and 14 deaths were documented from water treatment failures:

Causes included exhausted DI tanks, carbon bed failure, incomplete rinsing, and municipal water changes. Two‑stage RO and alarms reduce but do not eliminate this risk.

4. Human and machine errors persist

Despite checklists, errors occur roughly once per 733 treatments. Nearly two‑thirds of ESRD professionals witnessed an incorrect dialysate setup in a 3‑month period. Medication omission is the most frequent error. Disasters can disrupt source water or power, forcing emergency measures.

5. The patient’s disease is the biggest unknown

ESRD patients have 10‑20x higher cardiovascular mortality. Intradialytic hypotension, sudden cardiac death, and infections remain leading causes of death. Chronic endotoxin exposure contributes to inflammation, cardiovascular disease, malnutrition, and poor erythropoietin response — the main cause of death in HD patients. Anti‑endotoxin antibodies in patients prove endotoxins cross high‑flux membranes.

Why it feels like “the unknown”

🌀 Cumulative exposure

  • Risk isn’t one‑time. It resets every 48 hours.

👻 Invisible threats

  • Bacteria, endotoxin, and chemical contaminants can’t be seen, only tested for after the fact.

🧬 Biologic variability

  • A level safe for one patient may cause reaction in another.

⚙️ System complexity

  • 6‑10 components in the water chain + machine + human steps = multiple failure points.

What we can say

A well‑run unit makes dialysis as safe as commercial aviation — adverse events are rare. Ultrafilters, two‑stage RO, disinfection, and staff protocols drive risk very low. But we cannot promise zero. As ISO, AAMI, and JSDT state, ultrapure dialysis fluid is the goal because we know breakthrough still happens.
Bottom line: Medicine gives us the tools to fight, but not a guarantee. Each dialysis session is a managed risk, not a certainty. That’s why patients, families, and staff often describe every treatment as “borrowed time” or a gift.

— based on clinical evidence, patient safety data, and the reality of ESRD —