Lab Values for the NCLEX-RN®:
Reason Through Results Like a Nurse

The values that carry the most weight for nursing decisions group into a handful of panels. Begin with the basic metabolic panel: potassium, sodium, calcium, magnesium, chloride, BUN, creatinine, and eGFR. Build out from there to the complete blood count, coagulation studies, glucose and HbA1c, arterial blood gases, and therapeutic drug levels. This course works through each value as a recognizable pattern, so you learn what a high or low result is telling you, and the action a nurse should take next.

Below are common adult reference ranges. Values vary by laboratory, so confirm them against your facility, textbook, or course materials:

• Potassium: 3.5–5.0 mEq/L
• Sodium: 135–145 mEq/L
• Calcium: 8.5–10.5 mg/dL
• Magnesium: 1.6–2.2 mg/dL
• Chloride: 97–107 mEq/L
• BUN: 7–20 mg/dL
• Creatinine: 0.6–1.2 mg/dL
• eGFR: roughly 90 mL/min/1.73 m² or higher is a healthy adult value (KDIGO stage G1); 60–89 is mildly decreased; a value under 60 that persists three months or more supports chronic kidney disease.

Each value in the course is taught alongside what an abnormal result can signal and how the nurse responds.

Knowing the common ranges helps, but the exam is built around safe, entry-level nursing practice — so the greater skill is judgment: spotting an abnormal value, understanding why it matters, and selecting the safest action. That is exactly what this course trains. You learn the numbers in context, tied to meaning and to the nurse's response, so they hold up under exam pressure instead of slipping away.

Recall sticks faster when you study actively rather than reread. Quiz yourself (active recall), revisit the values across several days (spaced repetition), and attach each number to a simple image (dual coding). The course adds the N.U.R.S.E.S. walkthrough so you can reason through any result step by step — what's normal, what's abnormal, why it matters, and what the nurse should do.

A common reference range for potassium is 3.5–5.0 mEq/L; always check the range your lab prints. Because potassium is central to heart and muscle function, both low and high levels can alter the ECG and set off dangerous rhythm changes. On the exam, the point is to catch the unsafe value and respond — frequently by prioritizing cardiac monitoring and escalating appropriately.

Both reflect kidney function, but they tell you different things. Creatinine is the steadier, more specific marker of filtration — it's produced at a fairly constant rate and cleared by the kidneys, so a climbing creatinine points toward reduced kidney function. BUN can also rise with kidney trouble, but it shifts with dehydration, GI bleeding, a high-protein intake, and reduced blood flow to the kidneys, as in heart failure or shock. Reading the two together — the BUN-to-creatinine ratio — helps you reason toward the cause.

A common reference range for sodium is 135–145 mEq/L; verify your lab's printed range. Sodium moves with fluid balance, so a low or high value often shows up as neurologic change. The nurse reasons from the likely cause first — fluid loss, fluid overload, or a medication effect — and then chooses the fitting intervention.

Common adult reference ranges are calcium 8.5–10.5 mg/dL and magnesium 1.6–2.2 mg/dL, though labs differ. Both minerals shape neuromuscular and cardiac function, and an abnormal value in either can matter quickly. The course shows you how to separate a high result from a low one and how to choose the nurse's priority action for each.

Lab Values for the NCLEX-RN® was created by Dr. Mariano Alfred Acevedo, PhD, RN, founder of Jade NursingPrep™ and a nurse educator with decades of experience as a nursing faculty member, during which he helped prepare students for the NCLEX-RN®. That teaching background shapes the course: it works through lab values with clinical reasoning rather than memorization alone, and every clinical value is reviewed through a registered nurse's lens and tied to the range printed by your school, textbook, or facility.

A cheat sheet hands you numbers; this course teaches you how to use them. Every lab comes with a focused lesson, NGN-Style practice questions with full rationales, dual-coding visuals, and the N.U.R.S.E.S. reasoning walkthrough — so you can read a result and choose the safest nursing action.

It's $29, one time, with 12 months of access. The course is self-paced, so you can start whenever you like and move through it on your own schedule. Pricing and access terms are those shown at checkout.

No course can promise a passing result, and a prep product that does is worth approaching with caution. What this course offers is stronger clinical reasoning and steadier confidence with lab-value questions — better understanding and better preparation, not a guaranteed outcome.