After Critical Illness: Functional Mobility and Rehabilitation

Clinical framework

After intensive care, patients may experience muscle weakness, low exercise tolerance, breathlessness, sleep disturbance, cognitive changes and anxiety. ICU-acquired weakness is one possible contributor, not a label for every mobility problem after critical illness.

Assessment

• Review medical stability, oxygen requirements, lines, level of alertness, medication effects and mobility orders with the multidisciplinary team.
• Assess bed mobility, sitting, transfers, standing, walking, balance and recovery between tasks.
• Consider ICU Mobility Scale, MRC muscle strength assessment and functional walking measures where appropriate.
• Ask about previous independence, home access, caregiver support and personally important goals.

Safety and escalation

• Pause and seek medical review for new chest discomfort, collapse, unstable cardiovascular observations, severe breathing distress or major unexpected desaturation.
• New focal neurological changes, suspected thrombosis or confusion affecting safety need appropriate escalation.
• Individualize monitoring thresholds with the medical team rather than using a single heart-rate or oxygen cutoff for every patient.

Differential contributors

• Deconditioning, critical-illness neuropathy or myopathy, anemia, residual pulmonary disease and orthostatic symptoms can coexist.
• Delirium, depression, cognitive difficulty and disrupted sleep can independently limit participation.
• Rehabilitation should address the whole person, not only limb strength.

Mobility progression

• NICE recommends beginning individualized rehabilitation as early as clinically possible after assessment.
• Progress from active movement and sitting to transfers, standing, short supported walks and then longer functional walking.
• Brief bouts of approximately 2–5 minutes with adequate recovery may be a starting example for a very limited patient; duration and frequency must be tailored to physiological response.
• Progress assistance, walking distance and task complexity as tolerance improves.

Respiratory and energy strategies

• Use positioning, pacing and breathing strategies where they improve function.
• Airway-clearance techniques are not automatically needed by every post-ICU patient; choose them for a relevant secretion problem.
• Coordinate nutrition, cognition, sleep and emotional support with the wider team.

Outcomes and transitions

• Track transfers, gait distance, level of assistance, exertional symptoms and ability to perform daily activities.
• Document short- and medium-term goals at each transfer of care.
• NICE recommends functional review around 2–3 months after critical-care discharge when rehabilitation needs persist.

Common mistakes

• Mobilizing without a stability and line-safety check.
• Assuming normal resting observations guarantee exercise tolerance.
• Ignoring anxiety, cognition, nutrition or discharge support.
• Giving generic exercise without reassessment or follow-up.

Clinical pearls and summary

The most meaningful first milestone may be a safe toilet transfer or walk to the doorway. Recovery is a coordinated pathway with individual monitoring, realistic progression and continuity after discharge.