Impact of a structured delirium prevention protocol on incidence and outcomes in elderly postoperative patients.

Project Abstract

Delirium remains a common and under-recognized complication in elderly postoperative patients, contributing to prolonged hospital stays, increased mortality, functional decline, and higher healthcare costs. This study evaluates the effectiveness of a structured delirium prevention protocol implemented in a tertiary surgical ward, comparing incidence, severity, duration, length of stay, discharge disposition, readmission rates, and post-discharge functional outcomes with a historical control group receiving standard care. A quasi-experimental design was employed, enrolling 320 participants aged 65 years and older undergoing major non-cascular surgery, randomly assigned to receive either the delirium prevention protocol or standard postoperative care across two consecutive 12-month periods. The protocol integrated evidence-based multifactorial components (1) routine delirium risk assessment on admission using a standardized tool, (2) proactive mobilization and sleep hygiene strategies, (3) optimization of analgesia with multimodal and opioid-sparing regimens, (4) minimization of deliriogenic medications and early, regular cognitive orientation, (5) hydration, nutrition optimization, and electrolyte balance, (6) early removal of unnecessary catheters and stimulation of sensory aids (glasses, hearing devices), and (7) family engagement and environmental modifications to reduce confusion. Data were collected on delirium incidence using validated screening (Confusion Assessment Method) twice daily, with severity measured by the Memorial Delirium Assessment Scale, and duration tracked from onset to resolution. Secondary outcomes included in-hospital mortality, duration of delirium, length of intensive care unit and hospital stay, discharge to home versus facility, 30- and 90-day readmission rates, postoperative complications, and functional status assessed by standardized activities of daily living at discharge and 3 months post-discharge. Multivariate regression analyses adjusted for baseline risk factors (age, comorbidity burden, type and duration of surgery, pre-existing cognitive impairment). Results indicated a statistically significant reduction in delirium incidence in the protocol group (from 22.5% to 12.8%, relative risk 0.57, p<0.001). The median duration of delirium decreased from 2.9 days to 1.4 days (p=0.002), and delirium severity scores were lower across affected patients (p<0.01). The protocol cohort demonstrated shorter hospital stays (median reduction of 3.2 days, p=0.01) and lower rates of discharge to skilled facilities (p=0.03). In-hospital mortality showed a non-significant decline, whereas 30- and 90-day readmission rates were reduced (p=0.04 and p=0.05, respectively). Functional independence at discharge and at 3 months post-discharge favored the intervention group, with greater return to baseline activities and higher rates of home-based care. Adherence to protocol elements correlated inversely with delirium incidence, underscoring the additive effect of bundled components. Sensitivity analyses confirmed robustness of findings across subgroups defined by age strata, type of surgery, and baseline cognitive status. The study demonstrates that a structured, multifaceted delirium prevention protocol can substantially reduce delirium incidence and duration, improve functional outcomes, and shorten hospital stay in elderly postoperative patients, highlighting the importance of integrated nursing-led care pathways, multidisciplinary collaboration, and early mobilization and cognitive support as feasible, scalable strategies for optimizing postoperative recovery in aging populations. Potential barriers include staffing constraints and variability in adherence, which can be mitigated through targeted training, ongoing audit and feedback, and incorporation of delirium prevention protocols into standard postoperative care bundles.

Project Overview

What This Project Is About

---

A plain-language overview of the topic and what the project investigates.

---

---

The Problem It Addresses

---

What problem or gap this project tackles and why it matters to the field or society.

---

---

Objectives of the Project

---

1. Identify how a structured delirium prevention protocol can reduce delirium rates in elderly postoperative patients.
2. Describe common risk factors and how the protocol targets them.
3. Evaluate short-term outcomes such as length of hospital stay and need for readmission.
4. Assess patient and caregiver satisfaction with care during the postoperative period.
5. Provide practical recommendations for implementing the protocol in a clinical setting.

---

---

What You Will Do Step by Step

---

1. Review existing literature on delirium in postoperative elderly patients.
2. Develop or adapt a structured delirium prevention protocol for the study site.
3. Train nursing staff and ensure fidelity to the protocol.
4. Collect data on delirium incidence, outcomes, and safety indicators.
5. Analyze data using basic descriptive stats and compare pre- and post-implementation periods.
6. Interpret findings in light of practical constraints and clinical relevance.
7. Discuss limitations and potential improvements for future work.

---

---

Expected Outcome

The project is expected to show a reduction in postoperative delirium rates and improvements in related outcomes, such as shorter hospital stays and better patient experience, supporting broader adoption of the protocol in elderly surgical care.