Management of Urgent Finger Injuries
Begin with a standard 3-view radiographic examination (PA, lateral, and oblique) as the initial imaging for all acute finger injuries, as this detects most fractures and dislocations while guiding immediate treatment decisions 1.
Initial Assessment and Imaging
Radiography is always indicated as first-line imaging for suspected acute finger trauma 1. The imaging protocol depends on injury location:
- Phalangeal injuries: 3-view examination including PA, lateral, and both externally and internally rotated oblique projections (the internally rotated oblique increases diagnostic yield for phalangeal fractures) 1
- Thumb injuries: 2-view examination is usually sufficient, though adding an oblique projection slightly increases diagnostic yield 1
- Suspected tendon injuries: Radiographs detect fracture fragments that may require open reduction and internal fixation 1
A critical pitfall: Two views alone are inadequate for detecting fractures in finger joints—always obtain at least three views 1.
Specific Injury Management
Mallet Finger (Extensor Tendon Avulsion)
Radiographs are usually sufficient for evaluation 1. Operative fixation is indicated when:
- Articular surface involvement exceeds one-third 1
- Palmar displacement of the distal phalanx is present 1
- Interfragmentary gap exceeds 3 mm 1
Otherwise, splinting with the DIP joint in extension is appropriate 2.
Fingertip Injuries
Management should prioritize robust soft-tissue coverage over exposed bone or tendon, maximize functional length, preserve nail function, and minimize chronic pain 3. The approach is stepwise:
- Subungual hematomas: Trephination alone if nail plate intact 3
- Nail bed injuries with significant nail plate disruption: Formal nail plate removal with nail bed repair 3
- Soft-tissue coverage options (in order of complexity): Secondary intention healing, skin grafts, local flaps from affected digit, adjacent digit flaps, or hand-based flaps 3
Bony Injuries
Most are managed non-operatively 3. Operative indications include:
- Jersey finger injuries (flexor digitorum profundus avulsion) 3
- Unstable fractures 3
- Fractures with significant translation 3
High-Risk Injuries Requiring Specialist Referral
Immediate hand surgery consultation is mandatory for:
- Bite wounds (>80% harbor pathogenic organisms requiring prophylactic antibiotics) 4
- High-pressure injection injuries (require adjuvant antibiotic therapy) 4
- Digital amputations 5
- Severed flexor tendons at the distal joint 4
- Complex soft tissue defects requiring tendon or nerve reconstruction 4
Treatment Principles
Splinting should restrict motion of injured structures while allowing uninjured joints to remain mobile 2. This prevents stiffness in unaffected areas while protecting healing tissues.
For open injuries, many can be managed in the emergency department without specialist referral if accurately assessed 6. However, recognize that improper diagnosis and treatment causes long-term deformity and dysfunction 2.
When Initial Radiographs Are Negative
If clinical suspicion persists despite negative radiographs, two options exist 1:
- Short arm cast with repeat radiographs at 10-14 days (downside: delayed diagnosis may cause functional impairment)
- CT without IV contrast to confirm or exclude suspected fractures 1
The key consideration: Delayed diagnosis is common because many finger fractures are radiographically occult initially 1, so maintain high clinical suspicion and low threshold for advanced imaging or immobilization with follow-up.