Common Dialysis Labs
Key Takeaways
- Dialysis labs help the care team judge adequacy, nutrition, anemia, mineral balance, and safety risks.
- Technicians do not diagnose lab results, but they must recognize values that require reporting by facility policy.
- Potassium, hemoglobin, calcium, phosphorus, BUN, and creatinine often connect directly to treatment safety and patient teaching.
- Trends are usually more useful than a single value, especially when paired with symptoms and treatment adherence.
Reading Common Dialysis Labs
Dialysis lab review is part of safe team care. A technician is not expected to prescribe treatment or interpret results independently. The exam may ask what a lab suggests, what observation matters, and who should be notified.
| Lab | What it commonly reflects | Technician focus |
|---|---|---|
| BUN | Uremic waste level and adequacy context | Draw timed samples correctly and report missed treatments |
| Creatinine | Muscle metabolism and kidney failure context | Recognize it is expected to be high in ESRD, but trends matter |
| Potassium | Cardiac and muscle safety risk | Report critical or abnormal results and symptoms quickly |
| Calcium and phosphorus | Mineral bone disease balance | Reinforce dietitian and medication teaching within scope |
| Hemoglobin | Anemia status | Observe fatigue, shortness of breath, bleeding, or missed ESA doses |
BUN is often used in adequacy calculations such as URR or Kt/V. Pre- and post-dialysis BUN samples must be timed and processed correctly. A mislabeled or mistimed sample can make adequacy look better or worse than it really is.
Creatinine is usually elevated in patients with ESRD. It is not a simple measure of dialysis success by itself. Muscle mass, nutrition, residual kidney function, and adherence can affect trends.
Potassium is high-risk because severe abnormal levels can affect heart rhythm. A patient who reports weakness, palpitations, chest discomfort, or missed treatments needs prompt escalation to licensed staff, especially if recent potassium was high.
Calcium and phosphorus are reviewed together because they relate to bone, vascular calcification risk, diet, binders, and dialysis adherence. The technician can reinforce the approved plan, but diet changes and medication changes belong to licensed staff, dietitians, and prescribers.
Hemoglobin helps the team monitor anemia. Low values may connect with fatigue, pale appearance, shortness of breath, blood loss, missed medications, or inflammation. The technician documents observations and reports concerning symptoms rather than recommending a dose change.
A post-dialysis BUN sample is accidentally drawn before the prescribed treatment time is complete. What is the safest technician action?
A patient states, "My potassium was high, but I feel fine, so it does not matter." Which response is most appropriate within the technician role?
Which lab pattern most directly supports reinforcing mineral bone disease teaching within the approved care plan?