| Course | NURS 8250 Advanced Theoretical and Scientific Perspectives in Nursing |
|---|---|
| Week | Week 8 |
| Paper type | Discussion post with two peer replies |
| Length | About 620 words, 4 pages |
| Format | Discussion post, APA 7 citations |
| School | Walden University |
| Program | Doctor of Nursing Practice (DNP) |
| Updated | September 2026 |
Free sample paper for NURS 8250 Week 8
Week 8 Discussion: Initial Post
The Model Says How, Not Why: The Iowa Model, Levine's Conservation Principles and Prewarming Before Surgery
EBP models and nursing theories are often listed side by side in project proposals as if they did the same job. I want to argue they do not, using one change on a composite surgical service: prewarming adults with a forced-air blanket in the preoperative holding area before general anesthesia, so they arrive in the operating room warmer and lose less heat once anesthesia starts.
The Iowa Model is well suited to organizing that change. It starts from a trigger, here a rise in patients arriving in the recovery unit cold and shivering, checks that the issue matters enough to the organization, assembles people to work on it, gathers and appraises evidence, decides whether there is enough to pilot, designs and runs the pilot, and then decides whether to integrate and sustain the practice (Iowa Model Collaborative, 2017). Each step fits. The evidence is reasonably strong: a randomized trial found that even 10 to 20 minutes of forced-air prewarming before general anesthesia greatly reduced the share of patients who became hypothermic and reduced shivering compared with no prewarming (Horn et al., 2012). The model tells the team how to move from that evidence to a routine in the holding area.
What the Iowa Model does not tell the team is why prewarming works, or why it matters to nursing. The physiological why comes from outside nursing: anesthesia impairs thermoregulation and lets heat move from the body's core to its cooler periphery, so core temperature drops quickly, and warming the skin beforehand reduces that gradient (Sessler, 2016). The nursing why needs a nursing theory. Levine (1967) proposed that nursing supports the patient's wholeness by conserving four things: the patient's energy, the body's structure, the person's sense of self and the person's place among others, which she called energy, structural integrity, personal integrity and social integrity. Prewarming fits the first two directly. A cold patient spends energy shivering and rewarming, and hypothermia threatens structural integrity through effects on bleeding and wound healing. Personal integrity enters too: a patient shivering under thin blankets in a cold holding area experiences a loss of comfort and dignity at a vulnerable moment.
So the division of labor is this: the Iowa Model organizes how an evidence-based change is adopted, and a nursing theory explains why the change belongs to nursing and what it is protecting. A proposal that cites only the Iowa Model can succeed at adoption while having nothing to say about outcomes nurses care about beyond temperature, such as comfort. Levine's principles would suggest measuring patient comfort and shivering, not only core temperature.
Question for the thread: in your project, which framework answers how and which answers why?
Reply to Beatriz
Beatriz, you argued that the Iowa Model already includes theory because it asks teams to review evidence. Reviewing evidence tells a team whether an intervention works, but not what the nurse is trying to conserve or why. The trial by Horn et al. (2012) tells us prewarming prevents hypothermia. It does not tell us whether a warm patient who is frightened and alone in holding has been cared for well. That is where a theory like Levine's adds something the evidence cannot.
Reply to Connor
Connor, I like your suggestion to pair the Iowa Model with a middle-range theory rather than a grand one. For prewarming, a comfort theory could work as well as Levine's. I chose Levine because conservation of energy maps so directly onto shivering and heat loss (Levine, 1967), but the broader point holds either way: the project needs something besides the adoption model to explain what the change is for.
References
Horn, E.-P., Bein, B., Böhm, R., Steinfath, M., Sahili, N., & Höcker, J. (2012). The effect of short time periods of pre-operative warming in the prevention of peri-operative hypothermia. Anaesthesia, 67(6), 612-617. https://doi.org/10.1111/j.1365-2044.2012.07073.x
Iowa Model Collaborative. (2017). Iowa model of evidence-based practice: Revisions and validation. Worldviews on Evidence-Based Nursing, 14(3), 175-182. https://doi.org/10.1111/wvn.12223
Levine, M. E. (1967). The four conservation principles of nursing. Nursing Forum, 6(1), 45-59. https://doi.org/10.1111/j.1744-6198.1967.tb01297.x
Sessler, D. I. (2016). Perioperative thermoregulation and heat balance. The Lancet, 387(10038), 2655-2664. https://doi.org/10.1016/S0140-6736(15)00981-2
The Walden NURS 8250 Week 8 instructions
This late-course thread generally asks you to distinguish an evidence-based practice model from a nursing theory and to show how each would function in a project. Sections commonly ask for an opening post near five hundred words plus two responses. Choose one practice change with solid evidence, so the argument is not about whether it works. Walk the change through the process model's steps briefly. Then ask why the change works and why it matters to nursing, and show that the process model cannot answer. Bring in a nursing theory that can, and say what it adds to measurement. End with a question asking peers which framework answers how and which answers why in their own projects.
Inside the NURS 8250 Week 8 example
The opening paragraph states the claim and describes prewarming in the holding area. The second paragraph walks the Iowa Model from trigger to integration and cites Horn and colleagues on brief prewarming reducing hypothermia and shivering. The third separates the physiological explanation, citing Sessler, from the nursing explanation, citing Levine's conservation principles for energy, structure and personal integrity. A highlighted fourth paragraph states the division of labor and suggests measuring comfort and shivering as well as temperature. The reply to Beatriz explains that evidence of effect is not an explanation. The reply to Connor accepts a comfort theory as an alternative to Levine. The post keeps the evidence question settled early so that the whole argument can focus on function.
NURS 8250 Week 8 rubric: what earns full marks
Posts comparing process models and theories are generally assessed on accurate description of both, a clear distinction of function, application to one change and quality of replies. Description credit rewards correct steps of the process model and accurate concepts from the theory. The distinction is often weighted most and favors a post that shows what each framework can and cannot answer. Application to a single, well-evidenced change makes the distinction concrete. Replies earn credit for answering objections with a clear separation of evidence and explanation. Citations and posting on time supply the remaining marks. Faculty often reward posts that show the theory changing what a project would measure.
NURS 8250 Week 8 help: mistakes that cost marks
Week 8 posts often slip when they describe an EBP model and a theory side by side without showing how their jobs differ. Another common loss is choosing a change with weak evidence, which turns the post into an argument about evidence. Some posts claim the EBP model contains theory because it reviews evidence. Others name a theory without showing what it adds. Choose a well-evidenced change, walk the process model, ask why and show what a theory contributes to measurement. The desk can draft a post around the change your project addresses. List what your project will measure before writing, then ask which framework justifies each measure.
Get a NURS 8250 Week 8 example written to your instructions
Drop the thread prompt and rubric with the desk, name the process model your section discusses, and a thread entry setting theory against that model is ready inside 24 to 48 hours, with the first free. No such surgical floor exists, and the model your own post names ought to match the one your project runs on.
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NURS 8250 Week 8 questions, answered
Is an evidence-based practice model enough for a DNP project framework?
Many projects use one, and most rubrics in this course ask for a theory alongside it. The process model organizes the work of adopting evidence; the theory explains why the adopted change should affect the outcome. The example argues that a project using only a process model can describe what it did but not why it expected the result, which weakens its interpretation.
Which process model should the post discuss?
The one your section names or, where the choice is left open, the one your project uses. The Iowa Model appears in the example because its stages are distinct enough to show where explanation is missing. The Johns Hopkins model or the Stetler model would support the same argument, and a reply in the example makes that point using the Johns Hopkins appraisal step.
How is this thread different from the ways of knowing discussion earlier?
The earlier thread asked what kinds of knowledge count; this one asks what different frameworks are for. They connect, since process models tend to privilege empirical evidence, but the argument here concerns function rather than admission. The example keeps that distinction, and a post repeating the first week's argument in new vocabulary would miss what this prompt asks.
Where can I find a free NURS 8250 Week 8 sample paper?
The post on prewarming, the Iowa Model and Levine's principles, with both replies and four references, is free to read here. A post on your own project's frameworks can be requested.
What does Levine's theory add in the NURS 8250 Week 8 post?
An explanation of what prewarming protects: the patient's energy lost to shivering, structural integrity threatened by hypothermia and personal integrity at a vulnerable moment, which suggests measuring comfort too.