From Reacting to Preempting: Rethinking How ORs Handle Delays

Most OR delays are not caused by a single major disruption. They build gradually — a few extra minutes in prep, a slower-than-expected wrap-up, a turnover that starts late — until the schedule loses flexibility and the rest of the day begins to drift. 

The challenge for perioperative teams is recognizing delays early enough to intervene before they affect downstream cases, staffing decisions, room availability, and end-of-day predictability.

In our previous posts, we explored the structural gaps that make delay prevention difficult in real time and introduced Apella’s real-time Delay Alerts as a tool to close this gap. They surface emerging delays earlier, identify the specific case phase driving the disruption, and direct the signal to the teams best positioned to act.

The next question is: what does earlier intervention actually change?

Reduced delays across every monitored case and turnover phase

To understand the operational impact of proactive delay intervention, Apella analyzed phase-level delay durations across a subset of its customers (nearly 250 operating rooms) before and after the introduction of Delay Alerts. The analysis used a difference-in-differences model to compare alerted cases against control conditions, helping isolate the effect of the alerts from broader operational trends. The results demonstrated that Delay Alerts were effective in enabling earlier intervention to reduce time lost to inefficiencies and delays across prep, surgery, wrap-up, and turnover phases.

The turnover phase saw the largest relative improvement, with delays reduced by more than 10%. This reinforces how dependent turnovers are on timely coordination across teams, staffing, and room readiness. 

The surgery phase showed the largest absolute reduction, saving an average of almost eight minutes per alerted case. While active procedure time is often harder to influence directly, earlier visibility can still help teams escalate as necessary and anticipate downstream effects to keep the rest of the day moving.

The prep and wrap-up phases also saw consistent reductions. In these phases, earlier visibility can prompt teams to resolve issues such as missing anesthesia coverage, unready instruments, supply gaps, PACU readiness, or patient emergence delays before they create larger downstream disruptions.

Learn how Apella's Delay Alerts led to earlier intervention and more predictable OR days.
Read the full analysis

Improvement to staff workflows

The data tells one part of the story. The other is how perioperative teams respond when an alert appears. In a survey of charge nurses across Apella client sites, staff reported regularly acting on Delay Alerts, often multiple times per shift, with responses that were both consistent and phase-specific. Most charge nurses surveyed (86%) reported taking action in response to a delay alert at least once per shift. 

Delay Alerts help teams move through a faster response loop.

Investigate the delay

Because alerts are tied to a specific phase — prep, surgery, wrap-up, or turnover — teams know where to look first and what type of hold-up may be occurring. They can click into the live video to see what is happening in the room, often without interrupting the room with a call to understand what is happening.

Act on the root cause

Once teams understand what is driving the delay, they can take targeted action. That might mean sending available staff to help with positioning, draping, room setup, or turnover. It could also mean locating anesthesia or the surgeon, checking on supplies or instruments, or coordinating with PACU.

Adjust the rest of the schedule

A delay in one room can quickly affect the next case, the next surgeon, staffing assignments, pre-op readiness, and PACU flow. By surfacing delays earlier, Delay Alerts give teams more time to coordinate with upstream and downstream teams before the impact spreads. Staff reported earlier visibility into delays, phase-level detail that flags the type of hold-up to watch for, and the ability to diagnose issues via video without interrupting the room.

Across every phase, the alerts are not designed to replace operational judgment. They give teams earlier, more specific information so they can use that judgment sooner — and in the places where it is most likely to protect the rest of the day. 

The operational impact of earlier intervention

Although the reduction from any single delay alert may seem modest, those minutes add up quickly at the facility level. The combined impact of prep, surgery, wrap-up, and turnover phase Delay Alerts translate to an estimated three hours of delays prevented per room per month — or 728 hours saved annually at a site with 20 ORs. This demonstrates that by helping teams identify and act on delays while there is still time to intervene, delay alerts support a more predictable OR day — giving leaders greater confidence in staffing decisions, add-on case planning, and overall capacity management.

A different way to unlock OR capacity

The significance of these results lies not just in the time recovered, but in how it was recovered.

The improvements did not come from adding staff, extending OR hours, or pushing teams to work faster. They came from giving perioperative teams earlier visibility into emerging delays and creating more opportunities to intervene while there was still time to change the outcome.

This represents a fundamentally different approach to improving OR capacity. Traditional levers — building new rooms, increasing staffing, or expanding hours — carry significant operational and financial overhead, often making capacity initiatives difficult to justify due to high upfront costs and uncertain ROI. Earlier intervention carries no additional cost. It helps health systems recover capacity that already exists within the day but is routinely lost to small coordination gaps and preventable delays accumulating across surgical case phases.

Read the full outcome analysis: Reducing OR Delays Through Real-Time Phase Delay Alerts →