NR 573 Week 7 Case Simulation Analysis Example

Case Simulation Analysis: Why Minute 01:30, When Tinnitus and a Metallic Taste Were Called Anxiety, Decided a Local Anesthetic Toxicity Scenario More Than the Seizure or the Arrhythmia

Student Name

College of Nursing, Chamberlain University

NR 573: Advanced Acute Care Management Lab

Instructor Name

Month Day, Year

Case Simulation Analysis: Why Minute 01:30, When Tinnitus and a Metallic Taste Were Called Anxiety, Decided a Local Anesthetic Toxicity Scenario More Than the Seizure or the Arrhythmia

The Case in One Paragraph

In lab session 4, a 79-year-old with a hip fracture, 78 kg, had a fascia iliaca block with bupivacaine 20 minutes before our team entered. At 00:00 the patient described a tinny taste, tinnitus and numbness around the lips. At 01:30 I, as leader, called this anxiety. A seizure began at 02:10 and was treated with lorazepam. A wide-complex bradycardia appeared at 04:12 and was treated with atropine at 05:10. The pharmacist role asked about the block at 06:20; I named local anesthetic toxicity at 06:35; lipid emulsion began at 08:05. The patient arrested at 09:40 and had return of circulation at 11:00.

The Claim

The minute that decided this scenario was 01:30, when the prodrome was named as anxiety. Every later delay followed from that decision, because it removed local anesthetic toxicity from the team's working list at the point where the full sequence of treatment could have been prepared before it was needed.

Why 01:30 Rather Than 04:12

The obvious rival minute is 04:12, when the rhythm changed and nobody looked at the monitor for 28 seconds. That minute matters, but it was a consequence. By 04:12 the team was already working on a seizure of unknown cause, and when the bradycardia was noticed it was explained as postictal and vagal. A team that had named toxicity at 01:30 would have read the same rhythm change as progression of a known problem.

The second rival is 06:35, when I named the toxicity and gave an instruction to the room that took 75 seconds to produce the lipid kit. That minute cost time too. But it was the moment the team corrected its course, and by then the delay that mattered most had already accumulated.

The Standard Response at the Turning Point

The practice advisory on local anesthetic systemic toxicity describes a classic progression, from early nervous system signs such as a metallic taste, tinnitus and perioral numbness, to seizures, then to cardiovascular depression and arrhythmia, while noting that presentations vary and that some patients have cardiovascular signs first (Neal et al., 2018). The advisory's checklist begins with stopping any further local anesthetic, calling for help and getting the lipid emulsion to the bedside, then managing the airway and treating seizures with a benzodiazepine; lipid emulsion is given at the first sign of a serious problem such as seizure or arrhythmia. On that standard, the right response at 01:30 was not lipid, which the prodrome alone does not call for, but naming the toxicity, checking the time and dose of the block, and bringing the kit.

The Counterfactual, Run Concretely

Suppose that at 01:30 I had said, "Metallic taste and tinnitus 20 minutes after a bupivacaine block: this could be local anesthetic toxicity. Pharmacist, bring the lipid kit to the bedside now." On this scenario's timing, the kit would have arrived at about 02:45, given the 75 seconds it actually took. The seizure began at 02:10, before the kit arrived. Lorazepam would still have been given, and lipid could have started at about 03:00 instead of 08:05, five minutes earlier and more than a minute before the rhythm change.

I cannot say from this that the arrest at 09:40 would not have happened. Lipid may not have prevented the arrhythmia, and a faculty member running a manikin decides how the scenario responds. What the counterfactual does show is that the treatment the advisory calls for would have been in place before, not after, the cardiovascular phase began. The branch changes the timing of the treatment, which the evidence supports; it does not promise a different ending, which the evidence cannot.

Why the Minute Went the Way It Did

I had read the scenario stem, which mentioned the block, but I entered the room thinking about an older adult who was "acting strange" after a fracture, which led me toward delirium and anxiety. I did not say the block aloud on entry, and no one else did. The symptoms at 00:00 were exactly the ones the advisory lists, but in a frightened older adult each one alone has an ordinary explanation. Debriefing that looks for the frame behind an action, rather than at the action itself, is what made this visible to me: the decision at 01:30 followed from a frame that did not contain the block (Rudolph et al., 2006).

A Further Rival: Equipment

The lipid kit was in another room. If it had been at the bedside, as some units keep it near areas where blocks are done, the 75 seconds at 06:35 would have been shorter. That is a real system point, worth raising with the lab and with any unit that does blocks, but it is not the turning point; a kit at the bedside is only used if someone thinks to use it.

What This Means Outside the Lab

In a real hospital, blocks with long-acting local anesthetics are done in emergency departments, recovery rooms and on surgical floors, and the symptoms that come first are easy to attribute to pain, anxiety or opioids in an older adult. The patient's nurse may not know the dose or the time of the block, and the clinician called to the bedside may not have been told a block was done. The advisory notes that toxicity can appear soon after injection or be delayed, depending on the technique and the drug (Neal et al., 2018). The lesson of minute 01:30, in a sentence, is that the procedure history has to travel with the patient into every room where the symptoms might appear, and the first clinician to hear about a strange taste or ringing in the ears should be the one who asks about it, before reaching for an explanation that fits the patient's age.

What the Analysis Supports

One habit at the start of a scenario would have changed the timing of every later event: reading aloud the procedure and the local anesthetic dose on entry, and naming toxicity as a working explanation for any new neurologic symptom within an hour of a block. That is the change I am carrying into the next lab. The standard on debriefing asks for a summary that turns the analysis into an intention for future practice (Decker et al., 2021), and this is the intention, stated narrowly enough that faculty can watch for it in the next scenario.

References

Decker, S., Alinier, G., Crawford, S. B., Gordon, R. M., Jenkins, D., & Wilson, C. (2021). Healthcare Simulation Standards of Best Practice: The debriefing process. Clinical Simulation in Nursing, 58, 27-32. https://doi.org/10.1016/j.ecns.2021.08.011

Neal, J. M., Barrington, M. J., Fettiplace, M. R., Gitman, M., Memtsoudis, S. G., Morwald, E. E., Rubin, D. S., & Weinberg, G. (2018). The third American Society of Regional Anesthesia and Pain Medicine practice advisory on local anesthetic systemic toxicity: Executive summary 2017. Regional Anesthesia and Pain Medicine, 43(2), 113-123. https://doi.org/10.1097/AAP.0000000000000720

Rudolph, J. W., Simon, R., Dufresne, R. L., & Raemer, D. B. (2006). There's no such thing as "nonjudgmental" debriefing: A theory and method for debriefing with good judgment. Simulation in Healthcare, 1(1), 49-55. https://doi.org/10.1097/01266021-200600110-00006