| Course | NU743 Clinical Decision-Making and Collaboration |
|---|---|
| Unit | Unit 3 |
| Paper type | Discussion board post |
| Length | About 600 words, 3 pages double-spaced |
| Format | APA 7 discussion post |
| School | Purdue University Global |
| Program | Doctor of Nursing Practice (DNP) |
| Updated | September 2026 |
Free sample paper for NU743 Unit 3
One Vomit at Forty Minutes and Nothing Else: A Discussion Post Defending Observation Over CT for a 3-Year-Old After a Playground Fall, Using the PECARN Rule and the Risk of an Isolated Finding
NU743 · Unit 3 Discussion Board Post
Posted by [Student Name]
The child and family are composite; times and findings are bracketed.
Initial Post
The case: a [3]-year-old fell backward about [3] feet from a playground platform onto packed dirt. She cried immediately and did not lose consciousness, according to her parents. She vomited once, [40] minutes later. In the clinic her Glasgow Coma Scale is [15], her mother says she is acting normally, and she has a small swelling at the back of her head.
I would observe her for four to six hours from the time of injury rather than order a CT. The PECARN rule for children two and older, derived and validated in a large prospective cohort, identifies those at very low risk of clinically important brain injury (Kuppermann et al., 2009). She has none of the high-risk findings that point to CT: her Glasgow Coma Scale is normal, her mental status is normal, and she has no signs of a basilar skull fracture. She has one intermediate finding, vomiting. A fall of [3] feet is not a severe mechanism under the rule, which uses five feet for children her age. The scalp swelling does not count, because scalp hematoma is part of the branch for children under two.
For children with intermediate findings, the rule supports either observation or CT, guided by factors such as whether findings are multiple or worsening, the clinician's experience and parents' preference. Isolated vomiting is a weak signal on its own. In a secondary analysis of the PECARN cohort, clinically important brain injury occurred in 0.2 percent of children whose only finding was vomiting, compared with 2.5 percent of those with vomiting plus other findings (Dayan et al., 2014).
One vomit with nothing else is a reason to watch closely, not a reason to scan.
CT is not free of risk. A cohort study found that CT scans in childhood were associated with a small but measurable increase in later leukemia and brain tumors, rising with cumulative dose (Pearce et al., 2012). For a child at 0.2 percent risk, observation avoids that exposure while still catching the rare injury that shows itself.
I would tell the parents what to watch for and scan if she vomits again, becomes hard to wake, or behaves abnormally.
Reply to [Classmate J.]
[Classmate J.], you argued for CT because the parents are anxious and the clinic cannot observe her for six hours. Both are real considerations, and parental preference is one of the factors the rule itself names. I wonder whether observation at home with clear instructions, or a short observation period in the emergency department without a scan, could meet the parents' need for safety without the radiation. If the family could not return quickly or would not be able to watch her overnight, would that change your answer or mine?
Reply to [Classmate N.]
[Classmate N.], you pointed out that a 0.2 percent risk still means some children with injuries will be sent home. That is true, and the confidence interval in that analysis reaches close to one percent. I think the answer is in what observation adds: most important injuries show more signs within hours. Do you know of evidence on how many injuries in children with isolated vomiting would be missed after a period of observation, rather than at first assessment?
References
Dayan, P. S., Holmes, J. F., Atabaki, S., Hoyle, J., Tunik, M. G., Lichenstein, R., Alpern, E., Miskin, M., & Kuppermann, N. (2014). Association of traumatic brain injuries with vomiting in children with blunt head trauma. Annals of Emergency Medicine, 63(6), 657-665. https://doi.org/10.1016/j.annemergmed.2014.01.009
Kuppermann, N., Holmes, J. F., Dayan, P. S., Hoyle, J. D., Jr., Atabaki, S. M., Holubkov, R., Nadel, F. M., Monroe, D., Stanley, R. M., Borgialli, D. A., Badawy, M. K., Schunk, J. E., Quayle, K. S., Mahajan, P., Lichenstein, R., Lillis, K. A., Tunik, M. G., Jacobs, E. S., Callahan, J. M., . . . Wootton-Gorges, S. L. (2009). Identification of children at very low risk of clinically-important brain injuries after head trauma: A prospective cohort study. The Lancet, 374(9696), 1160-1170. https://doi.org/10.1016/S0140-6736(09)61558-0
Pearce, M. S., Salotti, J. A., Little, M. P., McHugh, K., Lee, C., Kim, K. P., Howe, N. L., Ronckers, C. M., Rajaraman, P., Craft, A. W., Parker, L., & Berrington de González, A. (2012). Radiation exposure from CT scans in childhood and subsequent risk of leukaemia and brain tumours: A retrospective cohort study. The Lancet, 380(9840), 499-505. https://doi.org/10.1016/S0140-6736(12)60815-0
The Purdue Global NU743 Unit 3 instructions
The Unit 3 board asks for a committed choice between two reasonable clinical options and a defense of it. A strong post states the case briefly, commits to a choice early, applies a named, validated rule or guideline correctly, cites evidence for the risks on both sides, and says what would change the decision. Expect an opening post near 430 words and two replies of roughly 150. Faculty reward accurate application of a rule's branches and thresholds, evidence that quantifies risk, and replies that engage the classmate's strongest point. If you are assigned the side you disagree with, argue it well; the board is testing whether a position can be built from evidence rather than habit.
How the NU 743 Unit 3 example is put together
The post opens with the case in four lines. The second paragraph commits to four to six hours of observation and applies the PECARN rule, explaining why her Glasgow Coma Scale, mental status and absence of skull fracture signs matter, why three feet is not a severe mechanism at her age, and why scalp swelling belongs to the under-two branch. The third cites a secondary analysis in which isolated vomiting carried a 0.2 percent risk against 2.5 percent with other findings, and the highlighted sentence states the conclusion. The fourth weighs the radiation risk of childhood CT. The close lists findings that would prompt a scan. One reply addresses parental anxiety and observation capacity; the other addresses the confidence interval.
Reading the NU743 Unit 3 grading rubric
Discussion posts in NU743 are frequently marked on the clarity of the position, application of evidence, accuracy, engagement and writing. Clarity rewards a decision stated early and defended throughout. Application earns credit when a validated rule is applied branch by branch, including features that do not apply. Accuracy covers correct thresholds and correctly reported risk figures. Engagement is judged on replies that take a classmate's strongest point seriously and ask something answerable. Writing covers concision, APA citation and staying close to the limits. Posts that name the findings that would change the decision often score well, because they show the position is conditional rather than fixed and help classmates test it.
NU743 Unit 3 help: mistakes that cost points
A common weakness is misapplying a rule, for example counting scalp hematoma location for a child over two. Another is treating any vomiting as a reason for CT without considering whether it is isolated. Some posts ignore the harms of the alternative, such as radiation exposure or missed injury. Others cite a rule without saying which branch applies. Many replies agree without engaging. And posts sometimes dismiss parental preference, which the rule itself names as a factor. State the case, commit to a choice, apply the rule precisely, quantify the risk on each side, name what would change your mind, and give each classmate a question that pushes the discussion further.
Get an NU743 Unit 3 example written to your instructions
Boards here often assign sides, so mention which one you drew along with the case, the posting rules and the rubric. A free first custom sample, written to those instructions, comes back within 24-48h, arguing that side with its sources, plus replies that answer the opposing classmates' strongest point instead of repeating the post. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
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NU743 Unit 3 questions, answered
What if I was assigned the side I disagree with?
Argue it anyway, and argue it well. The board is usually testing whether a position can be built from evidence, not whether it matches your practice habits. The strongest posts on an assigned side concede the opposing view's best point early, then show why the assigned position still holds for this particular patient.
Does the post need a decision rule, or is clinical judgment enough?
At the doctoral level a named, validated rule usually strengthens the argument, because it lets classmates dispute the application rather than the author's experience. Judgment still enters where the rule leaves room, as PECARN does for children with a single intermediate-risk finding, and the post says openly where the rule stops and judgment begins.
Could the sample defend a different clinical choice?
Yes. Imaging versus observation is one common pairing, and others include admitting versus discharging, treating empirically versus waiting for a result, or starting versus deferring a medication. Share the case and the side, and the sample builds the same shape: a committed claim, sourced evidence on both sides, and conditions that would reverse it.
Where can I find a free NU743 Unit 3 sample paper?
The complete NU743 Unit 3 discussion post appears on this page, with the case, a committed decision, the PECARN rule applied branch by branch, the risk of isolated vomiting, CT radiation risk, what would change the decision and two replies, plus three references. A post defending your assigned position can be drafted.
Why doesn't the scalp swelling count in NU743 Unit 3?
In the PECARN rule, a non-frontal scalp hematoma is a predictor only in the branch for children under two. For a three-year-old, the relevant findings are Glasgow Coma Scale, mental status, skull fracture signs, loss of consciousness, vomiting, mechanism and headache.