| Course | N437 Healthcare Informatics |
|---|---|
| Module | Module 4 |
| Paper type | Usability review |
| Length | About 1,024 words, 6 pages |
| Format | APA 7 student paper |
| School | Aspen University |
| Program | Pre-licensure BSN |
| Updated | September 2026 |
Free sample paper for N437 Module 4
Nine Clicks to Record a Temperature: A Heuristic Usability Review of a Blood Transfusion Documentation Screen
Student Name
Pre-licensure BSN Program, Aspen University
N437: Healthcare Informatics
Instructor Name
Month Day, Year
Nine Clicks to Record a Temperature: A Heuristic Usability Review of a Blood Transfusion Documentation Screen
Usability is how easily and safely people can use a system to do their work. Poor usability in the electronic health record costs time and can cause errors. This paper applies established usability heuristics to one screen that nurses on the same composite medical-surgical unit use under time pressure: the blood transfusion documentation screen, where nurses record the two-person identity check, vital signs before, during and after a transfusion, and any reaction. The screen described is a composite based on common designs.
Usability Standards and Heuristics
Heuristic evaluation is an inspection method in which reviewers judge an interface against a small set of recognized usability principles; Nielsen and Molich (1990) showed that several evaluators working independently find more problems than any one. Zhang et al. (2003) adapted the approach for medical devices, adding principles such as consistency and minimizing memory load, and showed that it could identify usability problems likely to cause medical errors in infusion pumps. The review below uses ten common heuristics, including visibility of system status, match with the real world, user control, consistency, error prevention, recognition rather than recall, flexibility, minimalist design, helping users recover from errors and documentation.
The Screen and Its Workflow
Transfusion documentation begins when the nurse opens the transfusion task in the medication record. The two nurses scan the patient's wristband and the unit of blood, then each signs. Baseline vital signs, vital signs at 15 minutes and at completion, and the start and stop times are entered. If a reaction occurs, a separate form must be opened. On this composite screen, recording one set of vital signs requires opening a flowsheet in a new window, finding the transfusion row, entering five values and returning, about nine clicks per set.
Problems Found
Two nursing students and the unit's informatics nurse reviewed the screen independently and then merged findings. Severity was rated from 1, cosmetic, to 4, likely to cause patient harm.
| Problem | Heuristic violated | Severity |
|---|---|---|
| Vital signs entered in a separate window with no link back to the transfusion task | Minimalist design; recognition rather than recall | 3 |
| No timer or prompt for the 15-minute vital signs | Visibility of system status; error prevention | 4 |
| Second-nurse signature accepted from any logged-in user, even one not present | Error prevention | 4 |
| Reaction form buried under a More menu | Match with the real world; flexibility | 3 |
| Start time defaults to the time the task was opened, not when infusion began | Error prevention; match with the real world | 3 |
| Different labels for the same field on two screens (temperature, temp) | Consistency | 2 |
| Error message on missing fields gives a code, not a plain explanation | Help users recover from errors | 2 |
How the Review Was Conducted
Heuristic evaluation works best with several evaluators who review independently before comparing notes (Nielsen & Molich, 1990). Each of the three reviewers walked through the transfusion task twice in the hospital's training environment, once as the primary nurse and once as the second nurse, using a test patient and a test unit of blood. Each recorded every problem, the screen where it occurred and the heuristic it violated. The reviewers then met, merged duplicate findings and agreed on a severity rating for each. Seven distinct problems remained. Two were found by only one reviewer, which supports the method's advice to use more than one evaluator. The review took about three hours in total, which is modest compared with the cost of a transfusion error.
Why These Problems Matter
The two severity-4 problems are safety risks. Without a prompt, the 15-minute check, when many acute reactions appear, can be delayed or missed when a nurse is called away. A signature path that allows a second nurse to cosign from another room turns a two-person bedside check into a formality. The start-time default can make a transfusion appear to have started earlier than it did, distorting the record if a reaction occurs. The lower-severity problems add time and frustration, which matter because every extra minute on a screen is a minute away from the patient.
Usability Is Also Implementation
Usability problems are not only the vendor's design. In a study of electronic records from two vendors across four health systems, emergency physicians completing the same tasks showed up to a nine-fold difference in time and an eight-fold difference in clicks, with error rates for some tasks ranging from 16.7% to 50% (Ratwani et al., 2018). The authors concluded that how a hospital configures its record matters as much as the vendor. Many of the problems on this screen, such as the separate window and the start-time default, are configuration choices the hospital can change.
Recommendations
The review recommends five changes. Vital signs should be entered directly within the transfusion task, reducing each set to about three clicks. A visible countdown should prompt the 15-minute check and alert the nurse if it is overdue. The second signature should require a badge scan at the bedside scanner. The reaction form should appear as a button on the main transfusion screen. The start time should be entered by the nurse when the infusion begins, not taken from the time the task was opened. Labels should be standardized. Each change should be tested with nurses in a training environment before release.
Evaluating the Redesign
After changes, the unit could measure the percentage of transfusions with vital signs documented within 20 minutes of start, the number of clicks and minutes per transfusion in a short timed test, and nurse ratings of ease of use on a brief questionnaire. A repeat heuristic review would confirm whether the severity-4 problems were removed. The results would be shared with the nurses who took part, so that they could see their feedback change the screen.
Conclusion
A heuristic review of one transfusion screen found seven problems, two of them likely to harm patients. The evidence shows that usability depends heavily on local configuration, so nurses who document on these screens every day are well placed to find problems and help fix them. Usability, in the end, is patient safety expressed in clicks.
References
Nielsen, J., & Molich, R. (1990). Heuristic evaluation of user interfaces. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (pp. 249-256). Association for Computing Machinery. https://doi.org/10.1145/97243.97281
Ratwani, R. M., Savage, E., Will, A., Arnold, R., Khairat, S., Miller, K., Fairbanks, R. J., Hodgkins, M., & Hettinger, A. Z. (2018). A usability and safety analysis of electronic health records: A multi-center study. Journal of the American Medical Informatics Association, 25(9), 1197-1201. https://doi.org/10.1093/jamia/ocy088
Zhang, J., Johnson, T. R., Patel, V. L., Paige, D. L., & Kubose, T. (2003). Using usability heuristics to evaluate patient safety of medical devices. Journal of Biomedical Informatics, 36(1-2), 23-30. https://doi.org/10.1016/S1532-0464(03)00060-1
N437 Module 4 instructions, in plain terms
Aspen's N437 description names quality and usability standards, and this sample was shaped by that listing because the module's real directions appear only to the class. A usability assignment typically asks you to explain a usability method or standard, apply it to a screen, device or system you know, identify problems and recommend improvements. Many instructors expect heuristic evaluation; some prefer a cognitive walkthrough or a usability questionnaire. Check whether you may describe a screen from your clinical site, how to avoid sharing proprietary images or patient data, whether severity ratings are expected and whether a table is required. Confirm the number of sources needed. Ask as well whether you must test your recommendations with users.
How the N437 Module 4 example is put together
The review contains about 1,020 words in ten sections with one seven-row table. It begins by defining usability and naming the screen. A section explains the method and its adaptation for health care. The screen and its workflow are described step by step. A section explains how the review was conducted by three independent evaluators. The problems table lists each finding with its heuristic and severity. Two sections explain why the problems matter and why configuration, not only vendor design, drives usability. Recommendations, a plan to evaluate the redesign and a short conclusion finish the review, all tied to the same transfusion task. Severity ratings run from cosmetic to likely harm.
N437 Module 4 rubric: what earns full marks
Usability reviews are usually marked on correct use of the method, the quality of findings, the link to safety and practical recommendations. The method is used as published, with independent evaluators, and a margin note points out that two problems were found by only one reviewer. Findings are specific and rated for severity in a clear table. The safety link is explained for each severe problem, which instructors reward. A multi-site study shows that local configuration matters, and another note explains why that strengthens the recommendations. Recommendations are concrete and testable, and an evaluation plan follows. APA references for the method, its adaptation and the multi-site study complete the marks. Keeping the review tied to one task also helps readers follow it.
Common N437 Module 4 mistakes, and how to avoid them
The most common mistake is writing general complaints, such as the screen is confusing, without naming the principle violated. Match each problem to a heuristic. Students also skip severity, which leaves readers unable to tell a cosmetic issue from a dangerous one. Rate them. Another frequent gap is describing the method without saying how you applied it: who reviewed, in what environment and how findings were merged. Some papers recommend a new system rather than fixing configuration, which is usually unrealistic. Recommend specific changes instead. Finally, never include real screenshots or patient data from a clinical site without permission, since that can breach policy. Describe the screen in words when images are not allowed.
Write yours, or have the desk draft it
This paper is an original model document written by our desk, not a submitted student paper and not an official Aspen University document. Read it for the moves, then write your own to the instructions in your classroom. If you want one built to your exact prompt and rubric, the first custom sample is free and arrives in 24 to 48 hours.
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N437 Module 4 questions, answered
What does N437 Module 4 usually ask for?
Aspen's N437 description includes quality and usability standards, so applying usability principles to a clinical system or screen is a typical assignment. Check your classroom for the required method.
What is a heuristic evaluation?
An inspection in which reviewers compare an interface against recognized usability principles, record where it violates them and rate how severe each problem is.
Can I review a screen from my clinical site?
Many instructors allow it, but describe it without screenshots or any patient information, and check your facility's rules before sharing details about its systems.
Where can I find a free N437 Module 4 sample paper?
The whole usability review, problems table and margin notes included, appears on this page at no cost to the reader. It is the fourth N437 sample.
What heuristics are used in an N437 Module 4 usability review?
Common ones include visibility of system status, match with the real world, user control, consistency, error prevention, recognition rather than recall, flexibility, minimalist design, error recovery and help.