PAtient-centered mUltidiSciplinary Care for vEterans Undergoing Surgery (PAUSE)

Background: Frailty is a syndrome of reduced physiologic reserve associated with higher postoperative mortality and adverse outcomes. The investigators' preliminary work shows that institution-wide frailty screening and introducing a "pre-surgical pause" reduces 6-month mortality threefold. However, a knowledge gap exists in the nature of the intervention and which stakeholders should be involved in the "pre-surgical pause". Multidisciplinary care models for complex patients are highly effective in oncology, wound care and primary care. The investigators propose a new care delivery model, i.e. PAtient-centered mUltidiSciplinary care for vEterans undergoing surgery (PAUSE), where experts from diverse fields contribute to surgical decision-making and optimize outcomes for high-risk Veterans.

Impact: Veterans above 65 years-of-age are a fast-growing population with significant need for high-quality surgical care. This study builds a structured multidisciplinary workflow to improve clinical and quality outcomes and provides high-value care for frail and high-risk Veterans that aligns with VA priorities and patient goals and expectations.

Innovation: This is the first study in the VA to implement a multidisciplinary care model for surgical care. The intervention employs an innovative hybrid-1 clinical effectiveness-implementation design to evaluate novel Veteran-centric outcomes of 30- and 180-day mortality, non-home discharge, rehospitalizations and home-time. A detailed formative evaluation (FE) evaluates provider and system factors that impact PAUSE intervention uptake. Further, the study has support from three national operational partners: National Surgery Office, Office of Geriatrics and Extended Care, and Palliative Care and Hospice Program.

Specific Aims: The goals for this project are to: (1) test the effectiveness of the PAUSE trial intervention vs usual care in improving 30- and 180-day mortality, non-home discharge, rehospitalizations and home-time for patients undergoing surgical evaluation; (2) test moderators of the PAUSE intervention effectiveness (treatment effect heterogeneity), especially specialty, frailty severity and risk status; and (3) use a mixed-method FE to understand the factors that influence fidelity, adaptation, and implementation of the PAUSE intervention. The investigators hypothesize that the PAUSE intervention will decrease 30- and 180-day mortality, rehospitalizations, and non-home discharge and increase home-time for all Veterans (Aim 1). The effect size for the outcomes will be greater for frail patients in certain specialties (Aim 2). The concurrent FE will highlight key barriers/facilitators for future implementation (Aim 3).

Methodology: The PAUSE trial is a pragmatic, stepped-wedge randomized clinical trial designed to capture a cohort of 25,000 Veterans scheduled for elective surgery at 3 large tertiary care VAMCs (Palo Alto, Houston and Nashville) and 7 specialty groups in each center: general, vascular, orthopedics, cardio-thoracic, urology, neurosurgery and others (e.g., plastics and ENT). The intervention includes standardized frailty screening and referral to a "multidisciplinary PAUSE Board" (surgery, anesthesia, geriatrics, palliative care, case management, rehabilitation and nutrition) for recommendations. Each 'step' is a randomly chosen specialty transitioning from usual care to the PAUSE intervention. Outcomes include 30- and 180-day mortality, non-home discharge, rehospitalizations and home-time. The Consolidated Framework for Implementation Research is used to guide FE and analysis of factors that influence implementation. The study spans across 4-years for pre-intervention FE (Y1), PAUSE intervention (Y1-3), post-intervention FE (Y3) and analysis (Y4).