Injury Severity Score (ISS) Triaging and Early Physiotherapy Timing
In short
Navigate early physiotherapy timing in severe polytrauma. Understand ISS thresholds, damage control orthopaedics, and safe bedside mobility protocols.
In this guide (5 sections)
High-energy polytrauma presents acute physiological instability demanding structured triage. The Injury Severity Score (ISS), derived by summing the squares of the highest Abbreviated Injury Scale (AIS) scores across three distinct anatomical regions, serves as the primary benchmark for systemic injury burden. Patients presenting with an ISS exceeding 15 are classified as sustaining major polytrauma, with scores above 25 indicating critical physiological compromise. Early physical rehabilitation must integrate directly with trauma surgery protocols, aligning physical loading with systemic inflammatory markers and hemodynamic stability.
Domestic and Cultural Indian Realities
In Indian metropolitan trauma centres and regional government medical colleges, polytrauma patients frequently transition from intensive care units to domestic home environments with limited step-down institutional support. Extended family members serve as primary bedside caregivers, often feeling overwhelmed by complex surgical dressings, external fixation hardware, and peripheral monitoring lines. Early home physiotherapy establishes structured transfer routines, replaces hazardous floor bedding with elevated wooden cots, and trains family attendants in safe limb support to prevent accidental traction on unstable skeletal segments.
Surgical Resuscitation and Damage Control Principles
Modern trauma management follows either Early Total Care (ETC) or Damage Control Orthopaedics (DCO). In borderline or unstable patients displaying systemic inflammatory response syndrome (SIRS), hypothermia, coagulopathy, or acidosis, definitive open reconstruction is deferred. Surgeons apply temporary spanning external fixators to stabilize long bone fractures and pelvic disruptions. Physiotherapists must recognize this physiological second hit phenomenon: vigorous early passive movements or premature upright sitting can trigger renewed inflammatory cascades, microvascular shunting, and pulmonary deterioration.
| Clinical Domain | ISS Category | Surgical Phase | Hemodynamic Holding Criteria | Permitted Physiotherapy |
|---|---|---|---|---|
| Mild Trauma (ISS 1 to 8) | Definitive internal fixation within 24 hours | Resting heart rate under 100 bpm, stable haemoglobin | Active-assisted joint range of motion, edge-of-bed sitting, protected crutch ambulation | |
| Moderate Trauma (ISS 9 to 15) | Single-stage or planned dual-stage osteosynthesis | Mean arterial pressure above 65 mmHg without vasopressors | In-bed active mobilization, chest clearance, bed-to-chair sliding board transfers | |
| Severe Polytrauma (ISS 16 to 25) | Damage control external fixation with deferred plating | Serum lactate under 2.5 mmol/L, PaO2/FiO2 ratio above 250 | Gentle passive positioning, anti-embolic foot pumping, supported upright head elevation | |
| Critical Trauma (ISS above 25) | Physiological preservation and intensive care resuscitation | Intracranial pressure stability, absence of active coagulopathy | Strict splint alignment maintenance, passive limb support, gentle chest vibrations |
Staged Early Bedside Mobilization Guidelines
Mobilization proceeds systematically once intracranial pressure normalizes, core body temperature stabilizes above 36 degrees Celsius, and base deficit clears. Therapists begin with gentle passive range of motion of uninjured joints, progressing to active-assisted movements of stabilized extremities. Upright elevation starts with 30-degree head-of-bed tilting, monitoring for reflex orthostatic hypotension, before advancing to supported high-Fowler sitting and bedside edge dangling.
Supported Supine Scapular and Upper Trunk Elevation
Objective: Activate trunk stabilizers and promote lung volume expansion without displacing stabilized pelvic or spinal fractures.
- 1Ensure all external fixator locking bolts and drainage lines are visually inspected and secured.
- 2Position the patient supine with a firm wedge pillow supporting the thoracic spine at 30 degrees.
- 3Instruct the patient to cross both forearms over the chest to eliminate unilateral shoulder torque.
- 4Cue a slow nasal inspiration followed by a gentle contraction of deep abdominal wall muscles.
- 5Maintain the stabilized position for five breath cycles before lowering slowly back to resting neutral.
Suspend active physical interventions immediately if systolic blood pressure drops below 90 mmHg, resting heart rate exceeds 120 bpm, serum lactate rises above 3.0 mmol/L, or oxygen saturation falls below 90 percent despite supplemental oxygen.
Long-Term Surveillance and Complication Prevention
Surviving major polytrauma requires vigilant monitoring for occult heterotopic ossification, post-traumatic joint contractures, and chronic muscular disuse atrophy. Longitudinal tracking using standardized functional outcome tools ensures systematic progression from assisted transfers to community independence.
- Metabolic and Nutritional Alignment: Ensure caloric intake meets hypermetabolic demands (1.5 to 2.0 grams of protein per kilogram daily) to prevent accelerated myofibrillar catabolism during prolonged bed confinement.
- Serial Radiological Correlation: Review interval orthogonal radiographs before altering weight-bearing restrictions, confirming cortical callus progression and absence of implant loosening.
- Neurovascular Continuity Auditing: Perform distal pulse palpation, capillary refill checks, and dermatomal sensation mapping before and after every bedside transfer session.
Frequently Asked Questions
How soon after polytrauma surgery can a patient start physiotherapy?
In stable patients with an ISS below 15 who undergo definitive fixation, gentle passive range of motion and in-bed positioning begin within 24 to 48 hours. In severe polytrauma with an ISS exceeding 15 under damage control external fixation, active rehabilitation is deferred until hemodynamic markers, serum lactate, and arterial blood gases normalize.
Why is aggressive stretching avoided in early polytrauma recovery?
Aggressive passive stretching induces microvascular trauma in healing muscles, triggers severe systemic inflammatory spikes, and substantially increases the risk of heterotopic ossification around injured joints. Physiotherapy relies on gentle, patient-controlled active-assisted motion within pain-free arcs.
Do I need a doctor referral to begin home physiotherapy after complex trauma or external fixation?
Under the National Commission for Allied and Healthcare Professions (NCAHP) Act 2021, patients in India enjoy direct access to registered physiotherapists without requiring a mandatory doctor referral. At BookPhysio.in, you connect with verified clinical physiotherapists and pay directly per session without advance packages, hidden platform fees, or long-term contracts.
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