Seven sources, one grid: a composite evidence table on IV replacement timing, carrying levels, quality grades and a closing synthesis, as NU325 often asks in Unit 7. Searches like "nu 325 unit 7 assignment example", "nu325 unit 7 sample" and "nu325 unit 7 example" land here.
Seven Sources, Ten Columns: An Evidence Table on Peripheral IV Replacement Timing
[Student Name]
Purdue University Global
NU325: Evidence-Based Nursing
Unit 7 Assignment
[Instructor Name]
[Date]
Rows 3 to 6 are composite sources written for teaching, with bracketed citation details; rows 1, 2 and 7 are published sources.
Key
VIP: Visual Infusion Phlebitis scale. CRBSI: catheter-related bloodstream infection. CI: confidence interval. JH: Johns Hopkins level and quality (Dang et al., 2022).
Table
Row 1. Citation: Webster et al. (2019). Purpose: compare clinically indicated with routine replacement. Design: systematic review with meta-analysis. Sample: 9 trials, over 7,000 participants. Intervention/comparison: clinically indicated vs routine. Outcomes: CRBSI, phlebitis, cost. Findings: no clear difference in CRBSI or phlebitis; lower cost with clinically indicated. Limitations: few CRBSI events; phlebitis defined differently across trials. JH: I, A. Relevance: direct.
Row 2. Citation: Rickard et al. (2012). Purpose: test equivalence of the two strategies. Design: randomized equivalence trial. Sample: 3,283 adults, three hospitals. Intervention/comparison: clinically indicated vs routine at 72 to 96 hours. Outcomes: phlebitis, CRBSI, insertions, cost. Findings: phlebitis about 7 percent in both groups; fewer insertions and lower cost with clinically indicated. Limitations: unblinded assessment. JH: I, A. Relevance: direct.
Row 3. Citation: [composite trial, Unit 5]. Purpose: test noninferiority. Design: pragmatic randomized trial. Sample: 1,406 adults, two hospitals. Intervention/comparison: clinically indicated vs 96 hours. Outcomes: VIP phlebitis. Findings: 6.4 vs 5.9 percent; difference 0.5 points (CI -1.8 to 2.8), noninferior. Limitations: unblinded scoring; 17 percent protocol deviations. JH: I, B. Relevance: direct.
Row 4. Citation: [composite cohort, author, year]. Purpose: relate dwell time to phlebitis. Design: prospective cohort. Sample: [number] catheters. Findings: phlebitis risk did not rise sharply after 96 hours. Limitations: confounding by indication. JH: III, B. Relevance: supports dwell beyond 96 hours.
Row 5. Citation: [composite cost analysis, author, year]. Purpose: compare costs. Design: economic analysis. Findings: lower supply and nursing-time cost with clinically indicated removal. Limitations: single-site costs. JH: V, B. Relevance: secondary outcome.
Row 6. Citation: [composite phenomenology, Unit 6]. Purpose: describe patients' experience of repeated insertion. Design: descriptive phenomenology. Sample: 12 adults. Findings: patients count the removal of a working line as harm. Limitations: recruiter bias; reflexivity thin. JH: III, B. Relevance: patient preference.
Row 7. Citation: O'Grady et al. (2011). Purpose: prevent catheter-related infections. Design: national guideline. Findings: replace no more often than 72 to 96 hours in adults; clinically indicated replacement left unresolved. Limitations: predates the largest trials. JH: IV, A. Relevance: current policy's basis.
Synthesis
What agrees. Five of the seven sources point the same way on phlebitis: removing catheters on clinical indication does not produce more phlebitis than routine replacement. Both randomized trials and the systematic review agree, and the cohort supports dwell beyond 96 hours.
What conflicts. The national guideline leaves the question unresolved, but it predates the largest trials, and newer infusion standards support removal on clinical indication (Gorski et al., 2021).
What is softer than it looks. Phlebitis was defined three different ways across the sources, so the agreement is between similar outcomes rather than identical ones. Bloodstream infections were too rare in any single trial to compare, and only the systematic review pooled enough to say there was no clear difference.
What is missing. Only the qualitative study asked patients anything.
Strength of evidence. Good and consistent evidence supports removal on clinical indication as no worse than routine replacement for phlebitis; evidence on bloodstream infection is limited.
References
Dang, D., Dearholt, S. L., Bissett, K., Ascenzi, J., & Whalen, M. (2022). Johns Hopkins evidence-based practice for nurses and healthcare professionals: Model and guidelines (4th ed.). Sigma Theta Tau International.
Gorski, L. A., Hadaway, L., Hagle, M. E., Broadhurst, D., Clare, S., Kleidon, T., Meyer, B. M., Nickel, B., Rowley, S., Sharpe, E., & Alexander, M. (2021). Infusion therapy standards of practice, 8th edition. Journal of Infusion Nursing, 44(1S), S1-S224. https://doi.org/10.1097/NAN.0000000000000396
O'Grady, N. P., Alexander, M., Burns, L. A., Dellinger, E. P., Garland, J., Heard, S. O., Lipsett, P. A., Masur, H., Mermel, L. A., Pearson, M. L., Raad, I. I., Randolph, A. G., Rupp, M. E., & Saint, S. (2011). Guidelines for the prevention of intravascular catheter-related infections. Clinical Infectious Diseases, 52(9), e162-e193. https://doi.org/10.1093/cid/cir257
Rickard, C. M., Webster, J., Wallis, M. C., Marsh, N., McGrail, M. R., French, V., Foster, L., Gallagher, P., Gowardman, J. R., Zhang, L., McClymont, A., & Whitby, M. (2012). Routine versus clinically indicated replacement of peripheral intravenous catheters: A randomised controlled equivalence trial. The Lancet, 380(9847), 1066-1074. https://doi.org/10.1016/S0140-6736(12)61082-4
Webster, J., Osborne, S., Rickard, C. M., & Marsh, N. (2019). Clinically-indicated replacement versus routine replacement of peripheral venous catheters. Cochrane Database of Systematic Reviews, 2019(1), CD007798. https://doi.org/10.1002/14651858.CD007798.pub5
How this NU325 Unit 7 example is structured
The table is designed to be read in both directions. Across a row, each source is summarized tightly enough to compare with any other; down a column, patterns appear that no single article shows. Cells hold fragments rather than sentences, which keeps the grid readable, and every number carries its unit. Rows are ordered by level of evidence, highest first, so the reader meets the strongest sources before the weaker ones. The limitations column is filled for every row, the guideline included. The synthesis does work the grid cannot: it notes that five sources point the same way on phlebitis, that bloodstream infections were too rare in any single trial to compare, that phlebitis was defined three different ways, and that only the qualitative study asked patients anything. A strength-of-evidence statement tied to the question closes it.
Get an NU325 Unit 7 example written to your instructions
Tables differ by section: some templates fix the columns, some ask for a synthesis matrix, and some want a narrative beneath. Forward the Unit 7 template or instructions, the rubric and the studies appraised so far; every cell of the returned table is drawn from those sources, with a synthesis reading across them. First sample free, ready in 24-48h. 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.
NU325 Unit 7 questions, answered
What goes in the relevance column of an evidence table?
A brief judgment of how closely the source matches your PICOT question: whether its population, intervention, comparison and outcomes resemble yours, and what that means for using it. A strong trial in a different population may deserve less weight than a weaker study on patients like yours. One or two lines per row is usually enough for that column.
Should a guideline appear in an evidence table?
Often yes, if your instructions allow non-research evidence. In the Johns Hopkins scheme, clinical practice guidelines sit at Level IV, below research, and they should be labeled as guidelines rather than studies. Note the year, since guidelines age, and whether the recommendation you cite is rated strong, weak or unresolved by its own authors.
How long should the synthesis beneath the table be?
Follow the prompt, though a few hundred words is common. The synthesis should say what the sources agree on, where they conflict and why, what is missing, and how strong the evidence is overall. It should not walk through each row again. If the synthesis could be rebuilt by reading the rows aloud, it has not yet synthesized anything.