NR 451 Week 4 Forced-Air Prewarming Evidence Table Example

Course	NR 451 RN Capstone Course
Week	4
Paper type	Evidence table
Length	About 1,130 words, 6 pages
Format	APA 7 student paper
School	Chamberlain University
Program	RN-to-BSN
Updated	October 2026

Free sample paper for NR 451 Week 4

Forced-Air Prewarming Before Elective Surgery: An Evidence Table for a Preoperative Holding Area

Student Name

College of Nursing, Chamberlain University

NR 451: RN Capstone Course

Instructor Name

Month Day, Year

What this page is doingThe title names the intervention, when it happens, where it would be delivered and the document type. A grader can see at once that the rows that follow were chosen for one change on one unit. Student APA 7 format, no running head.

Forced-Air Prewarming Before Elective Surgery: An Evidence Table for a Preoperative Holding Area

The Approved Problem and How the Table Is Organized

The approved capstone problem is inadvertent perioperative hypothermia among adults having elective surgery of more than one hour at a composite 16-bay preoperative holding area that serves eight operating rooms. A three-month audit of anesthesia records found that 31 of every 100 patients arrived in the postanesthesia care unit with a core temperature below 36.0 degrees Celsius, although every patient received intraoperative forced-air warming. Patients currently wait in holding for 45 to 90 minutes under a single cotton blanket. The proposed change is to start forced-air warming with a gown or blanket system in the holding area for at least 30 minutes before transfer to the operating room.

The four studies were selected from a search of CINAHL and PubMed for perioperative hypothermia, prewarming and forced-air warming in adults. Studies were kept when they tested active warming in adults having elective surgery and reported either core temperature or a clinical complication. Two classic trials older than ten years were kept deliberately, because they remain the primary evidence that the temperature drop this unit sees causes harm, and no later trial has repeated them with the same design. Pediatric studies, studies of cardiac bypass surgery and studies of fluid warming alone were excluded, because none matches the patients who wait in this holding area.

Each row below is one study. Designs are named in standard terms so strength can be compared down the column, and every row closes with applicability to this holding area, which is the column this table exists to complete. Rows are ordered by what they establish: first the harms of hypothermia that justify preventing it, then the evidence that warming prevents it, then the evidence specific to prewarming.

What this page is doingThe table is tied to the approved problem with a local baseline before any row appears, and the ordering rule is stated so a reader knows why the rows sit where they do. That makes the table countable and comparable, which is what a grader checks first.

Row 1: Kurz et al. (1996)

Design: Randomized controlled trial, double blind for outcome assessment.

Sample and setting: 200 adults having elective colorectal resection at university hospitals in the United States and Austria.

Intervention and comparison: Active warming to keep core temperature near 36.5 degrees Celsius versus routine care allowing core temperature to fall to about 34.5 degrees.

Outcome and measure: Surgical wound infection within 15 days, defined by culture-positive pus from the incision; length of stay.

Finding: Wound infection occurred in 19 of 96 hypothermic patients and 6 of 104 normothermic patients; hospital stay was 2.6 days longer in the hypothermic group.

Applicability: Establishes that the problem matters by showing a harm linked to a temperature drop similar to what this unit sees. The patients had colorectal surgery, a higher infection-risk procedure than much of this holding area's case mix, so the size of the effect may be smaller here. The trial tested intraoperative warming, not prewarming.

What this page is doingCells are short phrases in the same register down every row, the outcome carries its definition, and the finding is given as numbers. The applicability cell says what the study means for this holding area and where the fit fails, which is the column that carries most of the marks.

Row 2: Frank et al. (1997)

Design: Randomized controlled trial.

Sample and setting: 300 adults with cardiac risk factors or known coronary disease having abdominal, thoracic or vascular surgery at one academic hospital in the United States.

Intervention and comparison: Forced-air warming to maintain normothermia versus routine care.

Outcome and measure: Morbid cardiac events within 24 hours, including unstable angina, cardiac arrest and myocardial infarction, confirmed by predefined criteria; ventricular tachycardia on monitoring.

Finding: Morbid cardiac events occurred in 1.4% of the normothermic group and 6.3% of the hypothermic group.

Applicability: Adds a second, serious harm and a population this unit serves, older adults with cardiac risk. It again tested warming during and after surgery, not before. It supports treating hypothermia prevention as a patient safety goal rather than a comfort measure, which matters when the change competes for staff time in holding.

Row 3: Madrid et al. (2016)

Design: Systematic review and meta-analysis of randomized controlled trials.

Sample and setting: Published trials of active body surface warming in adults having surgery, across many countries and procedure types.

Intervention and comparison: Active warming systems, including forced air and resistive blankets, versus usual care or other warming methods, in any phase of surgery.

Outcome and measure: Surgical site infection, major cardiovascular complications, mortality, core temperature and shivering, as defined in each trial.

Finding: Active warming kept core temperature higher and reduced some complications, though much of the evidence was graded low quality and pooled estimates for several outcomes were imprecise.

Applicability: The strongest design in the table, supporting active warming in general. It cannot isolate the prewarming phase, and the review authors' low certainty grading should be carried into the proposal rather than upgraded on the way.

Row 4: Horn et al. (2012)

Design: Randomized controlled trial.

Sample and setting: 200 adults having elective surgery under general anesthesia lasting more than an hour at one university hospital in Germany.

Intervention and comparison: Forced-air prewarming for 10, 20 or 30 minutes before induction versus no prewarming; all groups received intraoperative forced-air warming.

Outcome and measure: Core temperature below 36.0 degrees Celsius at any point during surgery, measured continuously.

Finding: Hypothermia occurred in 69% of patients without prewarming and in 13%, 7% and 6% of patients prewarmed for 10, 20 and 30 minutes.

Applicability: The most direct row in the table: the same intervention, the same timing and the same comparison as the proposed change, with intraoperative warming given to everyone, which matches current practice here. It supports a 30-minute target and shows that even 10 minutes helps, which matters when a patient's holding time is short. It was a single-center trial and did not measure infection or cardiac events.

What this page is doingThe last row is the most direct, and its applicability cell says why: same intervention, same timing, same background practice. Pointing out that even ten minutes helped turns the table into something a holding area could act on when a case moves up the schedule.

What the Rows Show Together

Reading down the design column, the table holds three randomized trials and one systematic review, all Level I or II evidence. Reading down the applicability column shows a split. The two older trials establish why hypothermia matters, through wound infection and cardiac events, but neither tested prewarming; the review supports active warming in general at low certainty; and only one trial tested the exact change proposed, with a large effect on temperature and no outcome beyond it. The pattern supports the change on the question of temperature and leaves the link from prewarming to fewer infections or cardiac events inferred rather than shown.

That pattern shapes the capstone. The implementation plan should aim for at least 30 minutes of forced-air prewarming in holding, and the evaluation should measure first core temperature on arrival in the postanesthesia care unit against the 31 per 100 baseline, because temperature is the outcome the most direct evidence supports. Infection and cardiac outcomes remain important but are too infrequent to measure on one unit in one term, and the proposal should say so rather than promise them.

What this page is doingThe narrative below the table points at rows and draws a pattern out of them instead of restating each study in prose. It then carries that pattern into the choice of outcome for the evaluation, which is how an evidence table does work for the rest of the capstone.

References

Frank, S. M., Fleisher, L. A., Breslow, M. J., Higgins, M. S., Olson, K. F., Kelly, S., & Beattie, C. (1997). Perioperative maintenance of normothermia reduces the incidence of morbid cardiac events: A randomized clinical trial. JAMA, 277(14), 1127-1134. https://doi.org/10.1001/jama.1997.03540380041029

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

Kurz, A., Sessler, D. I., & Lenhardt, R. (1996). Perioperative normothermia to reduce the incidence of surgical-wound infection and shorten hospitalization. New England Journal of Medicine, 334(19), 1209-1215. https://doi.org/10.1056/NEJM199605093341901

Madrid, E., Urrútia, G., Roqué i Figuls, M., Pardo-Hernandez, H., Campos, J. M., Paniagua, P., Maestre, L., & Alonso-Coello, P. (2016). Active body surface warming systems for preventing complications caused by inadvertent perioperative hypothermia in adults. Cochrane Database of Systematic Reviews, 2016(4), Article CD009016. https://doi.org/10.1002/14651858.CD009016.pub2

Reading the NR 451 Week 4 instructions

The Week 4 evidence table asks you to organize the research supporting your capstone change. Look for columns covering design, sample and setting, intervention and comparison, outcome and measure, findings and level or applicability, with a short narrative and APA. Tie the table to your approved problem and local baseline before any row appears. State how studies were selected and why rows are ordered as they are. Keep cells short and parallel. Give findings as numbers. Close each row with applicability to your setting, saying what the study shows and what it cannot. Below the table, read down the columns and carry the pattern into your plan.

Inside the NR 451 Week 4 example

The opening section describes the holding area, the hypothermia problem and its local baseline, the CINAHL and PubMed search and the ordering rule. Row 1 reports Kurz and colleagues: 200 colorectal patients, wound infection in 19 of 96 hypothermic and 6 of 104 normothermic patients. Row 2 reports Frank and colleagues: cardiac events in 1.4% against 6.3%. Row 3 reports Madrid and colleagues' review, with low-quality evidence for several outcomes. Row 4 reports Horn and colleagues: hypothermia in 69% without prewarming and 13%, 7% and 6% after 10, 20 and 30 minutes. The narrative notes three trials and one review at Level I or II, and splits applicability between harms and the prewarming phase, setting a 30-minute target.

NR 451 Week 4 rubric: what full points look like

Evidence table rubrics in NR 451 usually reward a clear link to the problem, consistent extraction, accurate findings, appropriate leveling, applicability judgments, a narrative that interprets the table and APA. Applicability is the column graders read most closely, and this table earns it by saying what each study shows for this holding area and what it cannot. Extraction is credited because cells are short and parallel. Findings score as numbers. Levels are credited from design. The narrative earns points because it draws a pattern from the columns and carries it into the outcome measure and target. Four complete references with DOIs meet the APA row. Ordering rows by directness shows judgment.

NR 451 Week 4 help from the desk

Tables lose marks first for cells copied out of abstracts, which produce rows of full sentences that cannot be compared. Another loss is applicability left blank or generic. Students also mix the order of rows without a rule, give findings as words instead of numbers or write a narrative that repeats each row. Most capstone tables hold between four and six studies. The same studies can appear in the review and the table. The level column should follow the hierarchy your course uses. If your change is different, send your sources and an NR 451 evidence table can be built row by row with applicability.

Get a NR 451 Week 4 example written to your instructions

Send the Week 4 instructions, the table template your section issues and your approved problem, and a custom example is filled into your columns and returned inside 24 to 48 hours. The first one is free. The studies you choose to include remain your decision.

More NR 451 papers and RN-to-BSN samples

NR 451 Week 4 questions, answered

How many studies belong in the table?

As many as your section requires, and no filler beyond it. A table padded with weak sources loses more than a shorter table of relevant ones, because the applicability column exposes every row that does not fit. If the requirement is high and the evidence is thin, say so in the narrative rather than including studies that do not address the problem.

Should the same studies appear here and in the review?

Usually yes, and the overlap is expected rather than penalized. The table and the review do different jobs on the same evidence: one compares the studies structurally, the other argues from them. Sections differ on whether new sources may be added at this stage, so check the instructions before expanding the set.

What goes in the strength or level column?

Whatever framework your section names, applied consistently. Where a level of evidence hierarchy is specified, use its own labels rather than paraphrasing them. Where the column simply asks for quality, a short judgment with the reason attached reads better than a single word, because the reason is what a grader can mark.

Where can I find a free NR 451 Week 4 sample paper?

This page shows the complete Week 4 evidence table on forced-air prewarming, with the problem and baseline, four parallel rows, applicability judgments, the column reading and four references.

Which row is most direct in the NR 451 Week 4 table?

Horn and colleagues' trial, which tested prewarming for 10, 20 or 30 minutes before induction with intraoperative warming for everyone, matching the proposed change and comparison.