NU141CL Unit 8 Error Analysis Example

Adding Up Every Source Before the Tylenol: An Error Analysis of a Near Miss in Which a Composite Student Found a Combination Opioid Tablet Already Delivering Acetaminophen Before Giving a Second As-Needed Dose

[Student Name]

Purdue University Global

NU141CL: Pharmacology for Nursing Clinical

Unit 8 Error Analysis

[Instructor Name]

[Date]

The patient, student and unit are composite; doses are bracketed where illustrative, and the analysis follows a systems approach.

The Event

Patient Q, a composite 72-year-old woman, is on day three after a hip replacement. Her orders include hydrocodone-acetaminophen [5/325] mg, one to two tablets every [4] hours as needed for pain, and a separate PRN order for plain acetaminophen [650] mg, at least six hours apart, for fever or mild pain, with a note limiting total acetaminophen to [3] grams in 24 hours. At [1600], with a temperature of [38.0] C, the nurse asked the student to prepare acetaminophen. Before scanning it, the student opened the administration record and added up every acetaminophen-containing dose in the last 24 hours. She found that the patient had received two hydrocodone-acetaminophen tablets six times, [3,900] mg of acetaminophen from that source alone, plus one acetaminophen [650] mg dose the night before.

What the Total Meant

The patient had already received [4,550] mg of acetaminophen in 24 hours, well above the ordered [3] gram limit and above the commonly cited maximum of [4] grams for adults. Acetaminophen is broken down mainly in the liver, and when the usual pathway is overwhelmed, a toxic metabolite accumulates and can damage liver cells. Older age, poor nutrition and alcohol use lower the threshold for harm (Burchum & Rosenthal, 2022). Another [650] mg would have added to an already excessive total.

The danger was not in either order on its own; it was in the arithmetic across two orders that no screen added up.

Why It Happened

A systems approach looks for the conditions that allowed the slip rather than the person who made it (Reason, 2000). Four conditions combined:

1. Two separate as-needed orders contained the same drug, one hidden inside a combination product whose name begins with hydrocodone.

2. The limit of [3] grams was written as a comment on the acetaminophen order only, not on the combination product.

3. The electronic record did not total acetaminophen across products or alert when the daily limit was exceeded.

4. Night and day nurses each gave doses within each order's own rules, without a running total visible to either.

What Caught It

The student's habit of totaling acetaminophen from all sources before any dose, taught in the program's medication course, caught what the system did not. The nurse confirmed the total, held the acetaminophen, and called the prescriber. Cooling measures were used for the fever, and the prescriber changed the pain order to oxycodone alone for breakthrough pain, with scheduled acetaminophen kept within the limit. Liver tests ordered as a precaution were normal, and her fever settled overnight with the cooling measures alone.

How the Student Raised It

The student was nervous about questioning a dose the nurse had asked her to prepare, and about suggesting that earlier shifts had given too much. She showed the nurse the record with each dose and its acetaminophen content written beside it, rather than saying anything was wrong, and asked, "Can we check this total together before I give it?" Framing the concern as a shared check, with the numbers visible, made it easy for the nurse to look rather than defend. The rights of medication administration include the right dose, and a dose is only right when it is judged against everything else the patient has received that day (Potter et al., 2023).

Reporting the Near Miss

The event was entered in the facility's safety reporting system as a near miss, with no names, describing the two orders, the missing running total and the comment placed on only one order. Near-miss reports are how a unit learns about a weakness before it harms someone, and the pharmacy used this one to review how combination products and limits are displayed.

Recommendations

Write the acetaminophen limit on every order that contains acetaminophen, not only the plain product.

Ask the pharmacy whether the record can display a running 24-hour acetaminophen total and alert when a dose would exceed the limit.

When possible, avoid ordering a combination product and plain acetaminophen as needed at the same time.

Teach students and new nurses to total every source before any acetaminophen dose, including combination products.

Include combination products in handoff when reporting pain management.

What I Learned

I learned that the check that matters most for this drug cannot be done by looking at one order. It requires looking across the whole record and adding up. A correctly measured dose of the right drug, due at that moment, given exactly as ordered, could still have harmed this patient. From now on I will write the acetaminophen content beside every combination product on my worksheet, so the total is in front of me before anyone asks me to give a dose.

References

Burchum, J. R., & Rosenthal, L. D. (2022). Lehne's pharmacology for nursing care (11th ed.). Elsevier.

Potter, P. A., Perry, A. G., Stockert, P. A., & Hall, A. M. (2023). Fundamentals of nursing (11th ed.). Elsevier.

Reason, J. (2000). Human error: Models and management. BMJ, 320(7237), 768-770. https://doi.org/10.1136/bmj.320.7237.768