Understanding and Improving Theatre Utilisation

Why this topic matters

Suboptimal theatre utilisation directly impacts patient care, operational efficiency, and staff morale. Long waiting lists for elective surgery are a persistent challenge across the NHS, exacerbated by theatres not running at their potential. Each hour of unused theatre time represents a lost opportunity to treat patients, accumulating significant costs in terms of overheads and deferred patient care. Furthermore, inefficient scheduling can lead to staff frustration, burnout, and a perception of wasted resources.

Improving theatre utilisation is not just about 'filling' slots; it's about providing the right care to the right patient at the right time, safely and efficiently. It contributes to:

• Reduced waiting lists: Freeing up capacity to perform more procedures.
• Improved patient experience: Shorter waits and more predictable scheduling.
• Better financial stewardship: Maximising return on investment in a high-cost area.
• Enhanced staff satisfaction: Reducing 'dead time' and optimising clinical flow.
• Greater resilience: Creating buffers for emergency cases while maintaining elective activity.

Practical explanation

Theatre utilisation is typically defined as the proportion of available operating time during which the theatre is actively in use for patient care. It’s often measured as ‘wheels in to wheels out’ time compared to scheduled list time. However, a more comprehensive view considers the entire patient journey and all activities that contribute to a successful operation.

Key metrics often include:

• Operating time: The period from the patient entering the theatre (wheels in) to leaving (wheels out).
• Total list time: The scheduled duration for an operating list, including turnaround times.
• Utilisation rate: (Total operating time / Total list time) x 100%. This is a common starting point but can be misleading if not interpreted carefully.
• Turnaround time: The time from one patient leaving the theatre to the next patient entering.
• First case on-time start: The percentage of operating lists that start at their scheduled time.
• Cancellation rate: The percentage of planned operations cancelled, often categorised by reason (e.g., patient-factors, theatre capacity, staff availability).

True utilisation goes beyond these simple metrics. It encompasses the efficient flow of patients, equipment, and staff, and the prevention of delays contributing to 'wasted' capacity. Theatre efficiency relies on robust pre-assessment, timely access to diagnostics, appropriate bed availability, and effective discharge planning, all of which directly impact the theatre schedule.

Common pitfalls

Improving theatre utilisation is complex, and several pitfalls can undermine efforts:

• Focusing solely on 'utilisation rate': A high utilisation rate (close to 100%) can sometimes indicate over-scheduling, leading to rushed procedures, increased risk, and staff burnout. An optimal rate often allows for some flexibility and contingency.
• Ignoring turnaround times: Long turnaround times between cases significantly reduce overall theatre capacity. These are often due to inefficient cleaning, equipment preparation, or patient transfer processes.
• Poor scheduling practices: Inadequate matching of case complexity/duration to list length or surgeon expertise, block booking rigidities, or last-minute changes can disrupt flow.
• Lack of system-wide perspective: Problems outside the theatre suite (e.g., lack of ward beds, delayed pre-assessment, unavailability of imaging) frequently cause theatre delays or cancellations. Blaming 'theatre' in isolation is unhelpful.
• Data limitations: Inaccurate or incomplete data on actual theatre times, reasons for delays, and cancellations prevent effective analysis and targeted interventions.
• Resistance to change: Staff may be accustomed to existing processes, and changes to scheduling or workflow require careful engagement and leadership.
• Underestimating variability: Elective surgery lists are rarely fully predictable. Surgical times can vary, and emergencies can impinge. Building in appropriate buffers and flexible capacity is crucial.
• Clinical vs. operational disconnect: A lack of shared understanding and collaboration between clinical teams and operational managers can lead to conflicting priorities and suboptimal decisions.

Step-by-step approach to improving theatre utilisation

To effectively improve theatre utilisation, a systematic approach is essential. This often aligns with Quality Improvement (QI) methodologies.

1. Define and understand the problem

• Establish a multidisciplinary team: Include anaesthetists, surgeons, theatre nurses, ODPs, pre-assessment staff, ward staff, theatre managers, and management/QI leads.
• Map the current pathway: From patient referral to discharge. Identify all touchpoints and potential bottlenecks impacting theatre flow.
• Identify key metrics: Agree on what to measure beyond simple utilisation (e.g., first case on-time start, turnaround times, cancellation rates with reasons).
• Collect robust data: Use existing theatre management systems, manual data collection, or direct observation to understand actual timings and reasons for delays/cancellations over a representative period.

2. Analyse the data and identify root causes

• Visualise data: Use run charts, Pareto charts, and process maps to identify patterns and areas for improvement. For example, which part of the day experiences the most delays? What are the most common reasons for cancellations?
• Conduct root cause analysis: For example, using '5 Whys' to understand why first cases are consistently late or why turnaround times are extended.
• Benchmark: Compare your performance against internal historical data, peer organisations, or national standards where available to identify areas of significant variation or underperformance.

3. Develop and prioritise interventions

• Brainstorm solutions: Involve the multidisciplinary team. Solutions might include:
  • Scheduling improvements: More accurate surgical time estimation (e.g., using historical data), flexible scheduling models (e.g., partial block booking, 'super-sessions'), protected emergency theatre time.
  • Process standardisation: Standardised theatre setup, cleaning protocols, and patient transfer procedures to reduce turnaround times.
  • Pre-optimisation: Enhanced pre-assessment to ensure patients are fit for surgery (e.g., pre-habilitation, anaemia clinics, diabetic control).
  • Communication pathways: Improved communication between wards, pre-assessment, theatre, and recovery.
  • Equipment and supplies: Ensuring readily available and correctly prepared equipment and consumables.
  • Staffing: Addressing staff availability, skill mix, and training to meet demand.
• Pilot and evaluate: Test changes on a small scale (e.g., single theatre, specific list) and measure their impact using the agreed metrics.

4. Implement, sustain, and continuously improve

• Roll out successful interventions: After successful pilot, embed changes into routine practice.
• Monitor impacts: Continue to collect and review data to ensure improvements are sustained and identify new areas for optimisation.
• Regular review meetings: Maintain multidisciplinary team meetings to review performance, address ongoing challenges, and foster a culture of continuous improvement.

Example in clinical practice

A large NHS Trust was consistently struggling with theatre overruns and low first-case on-time start rates in their orthopaedic theatres, leading to frequent cancellations and staff dissatisfaction. A QI project was initiated using the framework above.

1. Define and understand: The team mapped the entire orthopaedic patient pathway. Data analysis revealed that first-case delays were often due to patients arriving late from the ward, unavailability of necessary equipment, or anaesthetic reviews running over. Turnaround times were extended by variations in cleaning procedures and delays in patient transport.
2. Analysis: Root cause analysis confirmed that lack of a standardised 'ready for theatre' checklist on wards, inconsistent equipment checking by theatre staff, and a fragmented patient transport service were key contributors.
3. Interventions: The team developed several interventions:
   • 'Theatre Ready' Checklist: A simple, ward-based checklist for nursing staff to ensure patients were prepared and ready for transfer at the scheduled time.
   • Standardised Equipment Trays: Working with supplies and theatre teams to create pre-packed, procedure-specific equipment trays and conduct daily equipment checks.
   • Dedicated Transport Slot: Collaborating with patient transport to allocate a specific slot for orthopaedic theatre transfers, with escalation pathways for delays.
   • Protected Anaesthetic Review Time: Scheduling anaesthetic reviews for the first case patient to occur before the scheduled start of the list, rather than overlapping.
4. Implementation and sustainment: These interventions were piloted in one theatre for two months. First-case on-time starts improved from 55% to 80%, and average turnaround times reduced by 15 minutes. After successful piloting, the changes were rolled out across all orthopaedic theatres, with ongoing monitoring through weekly theatre huddle board metrics and monthly QI meetings. The Trust saw a measurable reduction in late finishes and a slight increase in the number of cases performed per list, contributing to a reduction in their orthopaedic waiting list.

How Lazomis can help

Lazomis offers a suite of tools designed to support NHS teams in understanding, measuring, and improving theatre utilisation:

• Data Capture and Visualisation: Our platforms can integrate with existing theatre management systems or facilitate manual data input to create real-time dashboards and reports. These can clearly show utilisation rates, turnaround times, first-case on-time starts, and cancellation reasons, allowing for immediate identification of trends and issues.
• QI Project Setup and Tracking: Lazomis can guide teams through the structured phases of a Quality Improvement project, from problem definition and aim setting to intervention planning and impact measurement. Our templates help teams document their methodology and progress systematically.
• Process Mapping Tools: Visualise patient and process flow to identify bottlenecks and areas for standardisation directly within the Lazomis environment.
• Communication and Collaboration Features: Facilitate secure communication and document sharing among multidisciplinary teams involved in theatre optimisation, ensuring everyone is working from the same information.

By providing a centralised, intuitive platform for data, QI, and collaboration, Lazomis can help theatre teams move from identifying problems to implementing and sustaining effective solutions, providing the evidence base for ongoing improvement cycles.

This resource supports, but does not replace, clinical judgement. Local policy, formulary and specialist advice should be followed.