Unlocking Hidden Capacity in Acute Medical Units

Introduction

Acute Medical Units (AMUs) are critical hubs in NHS hospitals, managing a high volume of acutely unwell patients daily. The demand placed on AMUs often outstrips perceived capacity, leading to overcrowding, delays in patient onward progression, and increased pressure on staff. However, genuine capacity rarely equates to bed count alone; significant hidden capacity often exists within processes, pathways, and resource utilisation that can be liberated through focused improvement efforts.

This resource is designed to help clinical and operational leaders understand where this hidden capacity might reside and provide actionable steps to uncover and utilise it effectively, ultimately improving patient care and staff experience.

Why This Topic Matters

The efficient operation of an AMU has a ripple effect across the entire hospital system. Delays in AMU are directly linked to Emergency Department (ED) four-hour target breaches, longer inpatient lengths of stay, and increased potential for patient harm. Identifying and leveraging hidden capacity isn't just about 'doing more with less'; it's about optimising safe, timely, and effective patient care within existing resources.

Key benefits include:

• Improved patient safety and experience: Reducing delays, overcrowding, and unnecessary waiting.
• Enhanced staff well-being: Alleviating pressure from an overwhelmed system.
• Better resource utilisation: Making the most of existing beds, staff, and equipment.
• Reduced system-wide delays: Impacting elective care and other inpatient pathways.
• Financial efficiency: While not all recovered capacity is cash-releasing, optimising flow reduces avoidable costs associated with prolonged stays and readmissions.

Practical Explanation: Where Does Hidden Capacity Hide?

Hidden capacity isn't an extra ward or a miraculous surge of new staff. Instead, it’s the time, space, or resource that is available but is being inefficiently used or inadvertently blocked. It often manifests as:

1. Process Waste

This includes any activity that consumes resources but does not add value to the patient journey. Examples in an AMU include:

• Waiting time: For diagnostics, senior reviews, discharge medication, transport, or onward beds.
• Excessive handovers or documentation: Redundant information entry, multiple forms for the same data.
• Rework: Repeat investigations due to lost results, incorrect initial assessments, or misplaced requests.
• Unnecessary movement: Patients being transferred between areas without a clear clinical purpose.

2. Bottlenecks and Flow Blocks

Specific points in the patient pathway where flow consistently slows down or stops. Common AMU bottlenecks include:

• Diagnostic imaging (e.g., CT, MRI) availability and reporting.
• Access to specialist opinions (e.g., cardiology, gastroenterology) in a timely manner.
• Lack of clear discharge criteria or delays in discharge planning.
• Shortage of available beds on inpatient wards.
• Delays in therapy assessments or social care packages.

3. Suboptimal Staff Utilisation

This doesn't imply staff are idle, but rather that their skills or time may not be optimally aligned with patient need. Examples include:

• Senior clinicians spending excessive time on administrative tasks.
• Nurses or doctors waiting for results or equipment.
• Lack of skill mix optimisation: Not having the right professional at the right time.

4. Poor Information Flow

Ineffective communication or inaccessible information can cause significant delays.

• ** siloed IT systems.**
• Lack of real-time visibility of bed state, diagnostic results, or discharge readiness.
• Ineffective inter-departmental communication.

Common Pitfalls

Approaching capacity challenges without a systematic approach can lead to frustration and missed opportunities. Beware of:

• Focusing solely on bed occupancy: While important, it’s a lagging indicator. Focus on flow.
• Blaming individuals: Capacity issues are almost always systemic, not individual failures.
• Implementing solutions without understanding the root cause: Addressing symptoms rather than the underlying problem.
• Lack of multidisciplinary involvement: Solutions designed by one group rarely succeed without input and buy-in from all stakeholders.
• Ignoring data: Relying on anecdote rather than objective measures of delay and flow.
• Expecting immediate, dramatic results: Identifying and releasing hidden capacity is an iterative, continuous improvement journey.

Step-by-Step Approach to Unlocking Hidden Capacity

This structured approach uses principles of Quality Improvement (QI) and lean methodology to systematically identify and address capacity constraints.

Step 1: Define the Problem and Scope

• Identify specific areas of concern: Is it ED waits, AMU length of stay, or discharge delays? What are the key metrics you want to improve?
• Form a multidisciplinary team: Include AMU staff (doctors, nurses, ANPs), operational managers, ED representation, diagnostics, inpatient ward leads, therapists, and social care liaisons.
• Establish clear aims: Use SMART (Specific, Measurable, Achievable, Relevant, Time-bound) objectives. For example: "Reduce average AMU length of stay from X to Y hours by [date]."

Step 2: Map the Current State Patient Journey

• Process mapping (Value Stream Mapping): Visually represent the entire patient journey from ED arrival to AMU discharge/transfer. Include all steps, decision points, waits, and handovers.
• Gemba walks: Spend time observing the actual process on the ground, talking to staff and patients to understand their experiences and identify workarounds. What happens in 'real life' versus what's documented?
• Data collection: Gather quantitative data on key metrics such as:
  • Patient arrival times, decision to admit, admission to AMU bed, senior review times.
  • Time to first clinical assessment, diagnostic test turnaround times.
  • Time to decision to discharge/transfer, actual discharge/transfer times.
  • Staffing levels and skill mix.
  • Incidence of repatriations, transfers, or ward moves.

Step 3: Identify Waste and Bottlenecks

• Analyse the process map: Look for delays, queues, rework, excessive travel, and periods of inactivity. What adds value to the patient, and what doesn't?
• Use the '5 Whys' technique: For each identified problem, ask 'why' five times to dig down to the root cause. For example: "Patients are waiting for diagnostics." "Why?" "Radiology capacity." "Why?" "Shortage of radiographers." "Why?" "Recruitment and retention issues." "Why?" "Competitive market and workload." "Why?" "Lack of long-term workforce planning."
• Prioritise identified issues: Focus on the problems with the greatest impact on patient flow and capacity.

Step 4: Develop and Implement Solutions

• Brainstorm solutions: Involve the multidisciplinary team. Think creatively about how to eliminate waste, smooth flow, and unblock bottlenecks. Consider:
  • Proactive discharge planning: Starting discharge planning on admission, identifying expected date of discharge (EDD).
  • Early senior review and decision-making.
  • "Pull" vs. "Push" system: Can downstream wards 'pull' patients from AMU when ready, rather than AMU 'pushing' them before readiness?
  • Optimising diagnostic pathways: Dedicated AMU slots, point-of-care testing where appropriate, rapid reporting systems.
  • Reviewing protocols and pathways: Are they fit for purpose? Are there safe alternative pathways (e.g., Hospital at Home, Ambulatory Emergency Care)?
  • Improving handovers and communication: Structured handovers, shared digital platforms.
  • Effective bed management: Real-time visibility of bed availability across the hospital.
• Pilot small changes (PDSA cycles): Test interventions on a small scale, learn, adapt, and refine before wider implementation.

Step 5: Monitor, Sustain, and Spread

• Track key metrics: Continuously monitor the impact of changes. Is the length of stay decreasing? Are ED waits improving? Use run charts or statistical process control (SPC) charts.
• Regular reviews: Hold frequent multidisciplinary meetings to review progress, celebrate successes, and address new challenges.
• Standardise successful changes: Embed new processes into routine practice, update policies, and provide ongoing training.
• Share learning: Disseminate successful strategies within your organisation and beyond. This can be through local presentations, trust-wide newsletters, or national forums.

Example in Clinical Practice: Rapid Assessment and Discharge Model

An AMU was struggling with persistent occupancy over 100% and ED departure delays. Their multidisciplinary team undertook process mapping and identified significant waits for senior review and discharge medication.

Intervention:

1. Dedicated "Rapid Assessment & Discharge Zone": A small, distinct area within the AMU was designated for patients likely to be discharged within 12-24 hours. Staffing included a dedicated consultant or senior registrar and an experienced nurse.
2. "Consultant of the Week" Model: A designated consultant focused solely on discharges, reviewing discharge-ready patients across the unit, expediting discharge summaries, and coordinating with pharmacy/transport.
3. Proactive Pharmacy Liaison: A pharmacist dedicated to AMU initiated medication reconciliation and supply on admission for anticipated rapid discharges.
4. Daily Multidisciplinary Discharge Huddles: Short, focused huddles twice daily with AMU doctors, nurses, therapists, and social workers to review every patient's expected discharge date and any barriers.

Outcome: Within six months, the average AMU length of stay for suitable patients decreased by 30%, and ED four-hour breaches directly attributable to AMU capacity reduced by 20%. This demonstrated not only improved patient flow but also increased staff satisfaction through reduced overcrowding.

How Lazomis Can Help

Lazomis offers various tools that can significantly support your efforts to identify and unlock hidden capacity within your AMU:

• QI Project Setup Module: Helps you structure your capacity improvement project, define aims, identify stakeholders, and plan your PDSA cycles following a robust methodology.
• Data Visualisation & Dashboarding: Create real-time dashboards to monitor key AMU metrics (e.g., length of stay, consultant review times, discharge times, reasons for delay). This provides the essential data to identify bottlenecks and track the impact of your interventions.
• Process Mapping Tools: Digital tools to create clear, collaborative process maps of your patient journey, highlighting areas of waste and identifying critical bottlenecks.
• Audit Templates: Customisable templates for conducting audits on specific aspects of your AMU pathway, such as timely specialist reviews, discharge bundle completion, or diagnostic turnaround times. This helps to quantify the problem and monitor improvements.

These tools help standardise data collection, visualise flow, and track progress, allowing your team to focus on implementing and refining solutions rather than manual data management.

Key Takeaways