NUR 540 Module 9 Final Project Example

Final Project: From a Neighbor's Call to Discharge, a Pathophysiology Case Study of Pneumococcal Sepsis in a 79-Year-Old

[Student Name]

Southern New Hampshire University

NUR 540: Advanced Pathophysiology Across the Life Span

Final Project

[Instructor Name]

[Date]

The organization, setting and figures below are a composite written as a model document. No real employer, client, colleague or patient is described.

Final Project: From a Neighbor's Call to Discharge, a Pathophysiology Case Study of Pneumococcal Sepsis in a 79-Year-Old

Earlier submissions explained how this patient's pneumonia became sepsis and how the first six hours of care were chosen. This final case study brings those parts together and carries the story to discharge and beyond. It summarizes the course of illness, synthesizes the pathophysiology with the effects of age, reviews the decisions and technology, evaluates the response to treatment and considers recovery and prevention. The analysis shows that the patient survived because early recognition allowed treatment to interrupt the dysregulated host response before organ injury became irreversible, and that the same features of aging that made sepsis likely will shape the months of recovery that follow.

Course of Illness

Table 1 summarizes the patient's course from arrival to discharge.

Table 1

Timeline of Illness and Recovery

Note. Composite case.

The Mechanism in Brief

The illness began as a local defense that grew out of proportion. Pneumococci in the right lower lobe were detected by innate immune receptors, which released cytokines that summoned neutrophils and filled alveoli with exudate. In this patient the response escaped the lung. Circulating inflammatory signals activated the endothelium throughout the body, which produced nitric oxide and relaxed arterial tone, and loosened endothelial junctions so plasma seeped into tissues. Coagulation was switched on while its natural brakes were suppressed, consuming platelets and blocking small vessels. Cells starved of flow, and with damaged mitochondria, produced lactate and began to fail: the kidneys filtered less and the brain became confused (Singer et al., 2016). Each abnormal value at presentation belonged to one of those pathways.

Age as a Thread Through the Case

Age influenced the case at four points. Susceptibility came first: immunosenescence reduces the effectiveness of neutrophils, macrophages and antibody responses, while a low-grade inflammatory state common in older adults, sometimes called inflammaging, may predispose to a dysregulated response once infection takes hold. Presentation came second: a modest temperature and confusion as the leading sign delayed recognition by two days. Reserve came third: chronic kidney disease meant a smaller insult produced acute kidney injury, and a stiffer, less responsive cardiovascular system tolerated both hypotension and fluid less well. Outcome came last: in national data, older sepsis patients were more likely to die, died earlier in the hospital stay and, when they survived, were more often discharged to skilled nursing care (Martin et al., 2006). This patient's discharge to a rehabilitation facility fits that pattern exactly.

Decisions and Technology

The decisive moment was recognition. A triage nurse noticed that confusion was new, the sepsis alert confirmed the pattern and the first lactate quantified the threat. From there, current guidance shaped the response: antimicrobials within an hour for probable shock, cultures first, balanced crystalloid with reassessment, norepinephrine for persistent hypotension and hydrocortisone for an ongoing vasopressor requirement (Evans et al., 2021). The pneumonia guideline set the empirical antibiotics for severe community-acquired pneumonia, a beta-lactam with a macrolide (Metlay et al., 2019).

Technology mattered most where it answered a specific question. Repeated lactate showed whether perfusion was improving. The arterial line allowed norepinephrine to be titrated precisely. The passive leg raise with stroke volume measurement told the team when to stop giving fluid, which protected an older patient with kidney disease from overload. The urinary antigen and blood cultures identified the organism and allowed the team to narrow therapy on day one, reducing unnecessary antibiotic exposure.

Did Treatment Work?

Treatment should be judged by the mechanisms it targeted. Perfusion recovered: lactate fell from 3.9 after fluids to normal within a day, and norepinephrine was weaned by day two, showing that vascular tone and volume had been restored. Infection was controlled: the organism was susceptible to ceftriaxone, and fever and white cell count settled over three days. Organ function returned in the expected order. Oxygen needs fell as the consolidation cleared, delirium resolved by day four, and creatinine peaked on day three before falling, a lag typical of kidney recovery after sepsis-related injury. Platelets recovered as the stimulus to clotting subsided. Not everything returned to baseline: the creatinine of 1.5 mg/dL at discharge remained above the patient's usual 1.3, and the patient could no longer walk unaided.

After the Hospital

Surviving the hospital is not the end of sepsis. Among sepsis survivors, about half recover fully, about one-third die within the following year and about one-sixth have severe persistent impairment; new functional limitations, cognitive decline, anxiety and depression are common, and around 40% are readmitted within 90 days, often for infection or heart failure (Prescott & Angus, 2018). For this patient, the risks are concrete: new weakness, a kidney with less reserve than before and the possibility of lingering cognitive change in someone who lives alone. The discharge plan therefore included rehabilitation, a review of all medications for kidney dosing, a screen for cognition and mood, a follow-up visit within two weeks and a plan to assess, before returning home, whether living alone remains safe.

Prevention

The most effective intervention in this case would have been one that prevented it. The patient had not received a pneumococcal conjugate vaccine. For adults 65 and older who had not received one, national recommendations in 2022 called for a 20-valent conjugate vaccine alone or a 15-valent conjugate vaccine followed by the polysaccharide vaccine (Kobayashi et al., 2022). The patient should receive the recommended vaccine once recovered, along with annual influenza vaccination, since influenza predisposes to bacterial pneumonia. Earlier recognition is a second form of prevention. Teaching the patient, the niece who serves as health care proxy and the neighbor who raised the alarm that new confusion in an older adult with infection is an emergency may shorten the delay next time.

Implications for Advanced Nursing Practice

Three implications follow. First, advanced practice nurses caring for older adults should treat new confusion, falls or unexplained weakness as possible signs of infection, because the classic signs may be muted. Second, understanding the mechanism of sepsis makes guideline recommendations easier to apply to individual patients, for example stopping fluids when a dynamic test shows no further benefit in a patient with limited reserve. Third, the work does not end at discharge. Coordinating rehabilitation, medication review and follow-up after sepsis may do as much for long-term outcomes as the first hour of treatment.

Conclusion

This 79-year-old survived septic shock because a nurse recognized new confusion early and the team interrupted each pathway of the dysregulated response: antibiotics against the organism, fluid and norepinephrine against vasodilation and leak, oxygen against the shunt and close monitoring of failing organs. Age made the illness likely, disguised it and narrowed the margins of treatment, and age will shape the months of recovery ahead. The case shows why understanding pathophysiology across the life span is not academic: it is how a nurse knows what matters in an older patient who simply seems confused.

References

Evans, L., Rhodes, A., Alhazzani, W., Antonelli, M., Coopersmith, C. M., French, C., Machado, F. R., Mcintyre, L., Ostermann, M., Prescott, H. C., Schorr, C., Simpson, S., Wiersinga, W. J., Alshamsi, F., Angus, D. C., Arabi, Y., Azevedo, L., Beale, R., Beilman, G., . . . Levy, M. (2021). Surviving Sepsis Campaign: International guidelines for management of sepsis and septic shock 2021. Critical Care Medicine, 49(11), e1063-e1143. https://doi.org/10.1097/CCM.0000000000005337

Kobayashi, M., Farrar, J. L., Gierke, R., Britton, A., Childs, L., Leidner, A. J., Campos-Outcalt, D., Morgan, R. L., Long, S. S., Talbot, H. K., Poehling, K. A., & Pilishvili, T. (2022). Use of 15-valent pneumococcal conjugate vaccine and 20-valent pneumococcal conjugate vaccine among U.S. adults: Updated recommendations of the Advisory Committee on Immunization Practices, United States, 2022. Morbidity and Mortality Weekly Report, 71(4), 109-117. https://doi.org/10.15585/mmwr.mm7104a1

Martin, G. S., Mannino, D. M., & Moss, M. (2006). The effect of age on the development and outcome of adult sepsis. Critical Care Medicine, 34(1), 15-21. https://doi.org/10.1097/01.ccm.0000194535.82812.ba

Metlay, J. P., Waterer, G. W., Long, A. C., Anzueto, A., Brozek, J., Crothers, K., Cooley, L. A., Dean, N. C., Fine, M. J., Flanders, S. A., Griffin, M. R., Metersky, M. L., Musher, D. M., Restrepo, M. I., & Whitney, C. G. (2019). Diagnosis and treatment of adults with community-acquired pneumonia: An official clinical practice guideline of the American Thoracic Society and Infectious Diseases Society of America. American Journal of Respiratory and Critical Care Medicine, 200(7), e45-e67. https://doi.org/10.1164/rccm.201908-1581ST

Prescott, H. C., & Angus, D. C. (2018). Enhancing recovery from sepsis: A review. JAMA, 319(1), 62-75. https://doi.org/10.1001/jama.2017.17687

Singer, M., Deutschman, C. S., Seymour, C. W., Shankar-Hari, M., Annane, D., Bauer, M., Bellomo, R., Bernard, G. R., Chiche, J.-D., Coopersmith, C. M., Hotchkiss, R. S., Levy, M. M., Marshall, J. C., Martin, G. S., Opal, S. M., Rubenfeld, G. D., van der Poll, T., Vincent, J.-L., & Angus, D. C. (2016). The third international consensus definitions for sepsis and septic shock (Sepsis-3). JAMA, 315(8), 801-810. https://doi.org/10.1001/jama.2016.0287