NURS 6231 Week 2 System Analysis Example

Structure, Process and Outcome in an Elective Hip and Knee Replacement Program: Tracing Two Results Back to Design

Student Name

College of Nursing, Walden University

NURS 6231: Healthcare Systems and Quality Outcomes

Instructor Name

Month Day, Year

Structure, Process and Outcome in an Elective Hip and Knee Replacement Program: Tracing Two Results Back to Design

Elective hip and knee replacement is one of the most standardized service lines a community hospital runs. The patients are scheduled weeks ahead, the operations are similar, and the path from clinic to home is predictable enough that its design can be seen. This analysis uses a composite program at a 240-bed hospital that performs about 900 primary joint replacements a year. The aim is to lay the program across the three elements described by Donabedian (1988) and then trace two outcome measures back through the program's processes to the structures that make those processes possible. The analysis argues that the program's length of stay depends mainly on whether patients walk on the day of surgery, which depends on weekend therapy staffing, while the share discharged home depends mainly on planning that begins before admission.

Donabedian (1988) proposed that quality can be judged through structure, meaning the settings, people and resources in which care happens; process, meaning what is actually done for the patient; and outcome, meaning the resulting change in the patient's health. The model's value lies in the assumption that the three are linked: adequate staff and equipment make correct care more likely, and correct care in turn makes recovery more likely. A system analysis that lists the three separately misses the point of the model. The table below maps the program, and the sections that follow draw the connections.

The Program Mapped

Each entry in the structure column can be located or counted, each process step has a time and a person, and each outcome carries a definition.

Table 1

Structure, Process and Outcome in the Composite Joint Replacement Program

Structure

The program's structure is concrete. The orthopedic unit concentrates patients with nurses who recognize the usual course of recovery and notice departures from it early. Physical therapists work every day, and the weekend shift runs into the evening so that patients who leave the operating room in the afternoon can still be seen that day. A single nurse navigator follows each patient from the surgical decision to the first follow-up call. The order sets encode the pathway in the electronic record, so a new resident or float nurse receives the same instructions as a regular. The monthly service line meeting reviews every case that stayed longer than planned.

The list leaves out features that cannot be pointed to. A supportive culture or a commitment to excellence may exist, but neither can be connected to any process step, and an analysis that relies on them cannot be tested.

Process

The process column reads as one patient's path. After the surgical decision, the navigator calls within five days to schedule the preoperative class and ask who lives in the home and who will help after discharge. The class explains the pathway and names the expected discharge day, usually the first or second day after surgery. The patient comes in with walker and toilet riser arranged. On the day of surgery, anesthesia and analgesia follow the order set, using the opioid-sparing multimodal approach that the Enhanced Recovery After Surgery (ERAS) Society recommends for joint replacement (Wainwright et al., 2020). The first walk happens within hours of the operation. Therapy is delivered twice daily, and discharge follows when the patient meets the criteria rather than when a set number of days has passed.

Outcomes

Two outcomes are chosen so that each chain can be followed. Length of stay is counted in midnights from the day of surgery to discharge for every primary elective hip or knee replacement in the quarter. Revision surgery and fracture cases are excluded because their course differs. The second outcome is the proportion of those same patients discharged home, with or without home health, rather than to a skilled nursing or rehabilitation facility. Both use the same denominator and period, so a change in the case mix affects them together and can be seen.

Links Across the Columns

The first chain runs from weekend therapy staffing to same-day mobilization to length of stay. Patients operated on Friday afternoon were, before the evening weekend shift existed, often not walked until Saturday. The evening shift closes that gap. The evidence supports the second link: in a meta-analysis of five randomized trials with 622 patients, mobilizing earlier after hip or knee replacement shortened the hospital stay by about 1.8 days, with no increase in adverse events (Guerra et al., 2015). In most of those trials, patients in the early group first sat out of bed within 24 hours. The mechanism is plausible and testable locally: if the chain holds, Friday cases should show the largest drop in length of stay after the weekend shift began.

The second chain is different, and the evidence forces the analysis to be careful. It would be easy to argue that early walking also sends more patients home. The same meta-analysis found no difference in discharge destination between early and later mobilization groups (Guerra et al., 2015). The analysis therefore does not credit mobilization with the discharge-home rate. The stronger link runs from the navigator role to the preoperative home assessment to the discharge decision. When a caregiver is identified and equipment is in place before the operation, the question on the first postoperative day is whether the patient is ready, not whether the home is. When the home is unknown, a facility becomes the default. This link is also testable: patients whose home assessment was complete before surgery should be discharged home more often than those whose assessment was missed.

A third link connects the monthly meeting to both outcomes. By reviewing every long stay, the meeting finds process failures, such as a patient not walked because of nausea, that can be fixed in the order set. The meeting is structure that improves process over time, which is the loop implied by the model of Donabedian (1988).

Factors the Design Does Not Control

Not every result can be credited to design. Age, frailty, obesity, diabetes and living alone all influence both length of stay and discharge destination, and a quarter with more frail patients will look worse regardless of the pathway. A patient who lives alone with no available caregiver may reasonably need a facility however well the program performs. The analysis addresses this in two ways. The outcomes are reported alongside the proportion of patients over 75 and living alone, so a change in the mix can be seen, and comparisons are made within the same program across time rather than against hospitals with different populations. Even so, the chains described above are hypotheses about mechanism, and a program that attributed every change in its numbers to its own design would be overstating what it knows.

Conclusion

Laid across Donabedian's three elements, the joint replacement program shows two distinct chains. Weekend therapy staffing enables walking on the day of surgery, and walking early shortens the stay, a link supported by trial evidence. Discharge home depends on the navigator and the home assessment completed before admission, since the trials show that early walking does not change where patients go. Seeing the chains separately tells a nurse leader where to protect resources: cutting the weekend therapy shift would lengthen stays, and cutting the navigator role would send more patients to facilities.

References

Donabedian, A. (1988). The quality of care: How can it be assessed? JAMA, 260(12), 1743-1748. https://doi.org/10.1001/jama.1988.03410120089033

Guerra, M. L., Singh, P. J., & Taylor, N. F. (2015). Early mobilization of patients who have had a hip or knee joint replacement reduces length of stay in hospital: A systematic review. Clinical Rehabilitation, 29(9), 844-854. https://doi.org/10.1177/0269215514558641

Wainwright, T. W., Gill, M., McDonald, D. A., Middleton, R. G., Reed, M., Sahota, O., Yates, P., & Ljungqvist, O. (2020). Consensus statement for perioperative care in total hip replacement and total knee replacement surgery: Enhanced Recovery After Surgery (ERAS®) Society recommendations. Acta Orthopaedica, 91(1), 3-19. https://doi.org/10.1080/17453674.2019.1683790