Pregnancy test when status unknown and advanced imaging planned
Urine hCG point-of-care
Shared decision making for imaging choices
Preoperative or complication-driven
Labs for specific scenarios
Open fracture or suspected infection
Complete blood count for systemic infection concern
C-reactive protein for inflammatory trend
Anticoagulation or bleeding concern
INR for warfarin exposure
Platelet count for thrombocytopenia concern
Interpretation pearls
Lab limitations
Normal inflammatory markers do not exclude open injury contamination
Early infection may be absent
Clinical wound assessment priority
Coagulation results do not replace local hemostasis evaluation
Compartment syndrome remains clinical
Expanding hematoma requires reassessment
Diagnostic Tests
Scoring Systems
Classification and instability frameworks
Herbert and Fisher scaphoid fracture classification
Type A stable acute fractures
A1 tubercle fracture
A2 incomplete waist fracture
Type B unstable acute fractures
B1 distal oblique fracture
B2 complete waist fracture
B3 proximal pole fracture
B4 fracture dislocation
B5 comminuted fracture
Type C delayed union
Persistent fracture line
Incomplete healing after weeks
Type D established nonunion
Sclerotic margins
Cystic change
Displacement and angulation markers
Displacement greater than 1 mm as instability marker
Humpback deformity as instability marker
MRI
MRI for occult fracture and vascular risk
Indications
High clinical suspicion with negative radiographs
Proximal pole fracture suspicion
Performance
High sensitivity for occult scaphoid fracture
High specificity for occult scaphoid fracture
Protocol considerations
Dedicated wrist MRI
Coronal and sagittal sequences through scaphoid
Additional yield
Bone contusion identification
Ligamentous injury identification
CT
CT for cortical detail and displacement
Indications
Suspected displacement
Preoperative planning
Performance
Better for fracture line and displacement than plain radiographs
Less sensitive than MRI for purely trabecular occult injury
Technique considerations
Thin-slice CT through carpus
Multiplanar reformats aligned with scaphoid axis
Interpretation pearls
Step-off measurement
Comminution assessment
Ultrasound
Ultrasound adjuncts
Point-of-care ultrasound limitations
Operator dependent
Not definitive to exclude scaphoid fracture
Possible findings
Cortical disruption
Periosteal hematoma
Use cases
Resource-limited settings as adjunct
Soft tissue assessment for tendon injury
Disposition
Discharge criteria
Outpatient pathway
Closed injury
Intact neurovascular status
Pain controlled with oral agents
Immobilization in thumb spica splint
Splint fit comfortable
Fingers well perfused
Follow-up plan
Hand surgery or orthopedics within 7 to 14 days
Repeat imaging plan documented
Admission or transfer criteria
Higher level care triggers
Open fracture
IV antibiotics
Urgent operative evaluation
Associated perilunate dislocation or fracture dislocation
Emergent reduction considerations
Urgent hand surgery consultation
Neurovascular compromise
Emergent specialist evaluation
Consider acute carpal tunnel syndrome
Follow-up imaging strategy
Imaging after initial negative radiographs
Repeat radiographs at 10 to 14 days
Scaphoid views
Clinical re-exam correlation
Early MRI as alternative to delayed radiographs
Earlier definitive diagnosis
Potential reduction in unnecessary immobilization
Treatment
Immobilization
Initial immobilization strategy
Thumb spica splint for suspected or confirmed scaphoid fracture
Short arm thumb spica as common ED choice
Long arm thumb spica for select unstable patterns
Immobilization position
Wrist slight extension
Thumb in functional position
Skin and swelling precautions
Padding over bony prominences
Recheck swelling within 24 to 48 hours
Analgesia
Pain control options
Acetaminophen
Adults 650 mg to 1000 mg PO every 6 to 8 hours as needed
Maximum 3000 mg per day typical outpatient ceiling
Lower maximum with liver disease
Ibuprofen
Adults 400 mg PO every 6 to 8 hours as needed
Maximum 2400 mg per day typical outpatient ceiling
Avoid with significant renal disease
Naproxen
Adults 250 mg to 500 mg PO every 12 hours as needed
Maximum 1000 mg per day
Avoid with active GI bleeding
Opioid rescue for severe pain
Hydromorphone
Adults 1 mg PO every 4 to 6 hours as needed
Avoid co-prescribing with sedatives when possible
Wound and infection management
Open injury bundle
Cefazolin IV
Adults 2 g IV every 8 hours
Higher dose pathways for obesity per local protocol
Add gram-negative coverage for severe contamination per local protocol
Tetanus prophylaxis
Vaccine update per immunization status
Tetanus immune globulin for high risk wounds when indicated
Definitive management considerations
Surgical versus nonoperative factors
Nonoperative typical candidates
Nondisplaced waist fracture
Distal pole fracture
Operative fixation typical considerations
Displacement greater than 1 mm
Proximal pole fracture
Comminution
Fracture dislocation
Healing expectations
Distal pole union usually faster than proximal pole
Proximal pole higher nonunion and avascular necrosis risk
Special Populations
Pregnancy
Pregnancy-specific considerations
Imaging selection
Plain radiographs with shielding when needed
MRI preferred over CT when feasible for occult fracture
Analgesia safety
Acetaminophen preferred first line
NSAID avoidance in later pregnancy per obstetric guidance
Follow-up coordination
Obstetric communication if advanced imaging or opioids used
Return precautions for swelling and neurovascular symptoms
Geriatric
Older adult considerations
Osteoporosis and fragility mechanisms
Lower energy falls still fracture risk
Higher risk of concomitant distal radius fracture
Medication cautions
NSAID renal and GI risk
Opioid fall risk and delirium risk
Follow-up reliability
Earlier definitive imaging when access barriers expected
Splint checks for skin breakdown risk
Pediatrics
Pediatric considerations
Epidemiology differences
Scaphoid fracture less common in younger children
Increasing incidence in adolescents
Imaging and exam nuances
Ossification center variations by age
High suspicion despite subtle radiographs
Weight-based analgesia
Acetaminophen
15 mg per kg PO every 6 hours as needed
Maximum 60 mg per kg per day typical outpatient ceiling
Ibuprofen
10 mg per kg PO every 6 to 8 hours as needed
Maximum 40 mg per kg per day
Background
Epidemiology
Population patterns
Most common carpal bone fracture
Higher prevalence in adolescents and young adults
Sports and FOOSH association
Common fracture location
Waist fractures most frequent
Proximal pole fractures less frequent but higher risk
Missed fracture risk
Initial radiographs can be negative
Clinical suspicion remains key
Pathophysiology
Anatomy and blood supply
Retrograde blood supply predominance
Proximal pole perfusion vulnerability
Avascular necrosis risk with proximal fractures
Biomechanics
Compression and shear across waist with wrist extension
Humpback deformity from flexion collapse in unstable fractures
Complication pathways
Nonunion progression to scaphoid nonunion advanced collapse
Radiocarpal arthritis over time
Therapeutic Considerations
Management principles
Immobilization importance with suspected occult fracture
Prevent displacement and nonunion
Protect blood supply
Imaging strategy impact
Early MRI can reduce unnecessary immobilization time
CT useful for displacement and union assessment
Risk factor modification
Smoking cessation counseling
Activity restriction adherence
Patient Discharge Instructions
copy discharge instructions
Scaphoid fracture suspected or confirmed
Thumb spica splint until follow-up
Keep splint clean and dry
Do not remove splint unless instructed
Activity limits
No lifting or gripping with injured hand
No sports until cleared
Pain control
Acetaminophen as directed
Ibuprofen or naproxen only if safe for you
Elevation and swelling
Hand elevated above heart when possible
Finger motion encouraged if not painful
Follow-up
Hand surgery or orthopedics appointment within 7 to 14 days
Repeat imaging or MRI plan at follow-up
Return to ED now for
Increasing numbness or tingling
Fingers turning blue or very cold
Severe pain not improving
Splint feels too tight with worsening swelling
New deformity after a new injury
Fever or spreading redness if wound present
References
Clinical guidelines and core sources
Reference set
Hand and wrist fracture management consensus statements
Immobilization for suspected occult scaphoid fracture with negative radiographs
Advanced imaging options MRI and CT for occult injury and displacement
Orthopedic and hand surgery texts
Scaphoid vascular supply and avascular necrosis risk
Herbert and Fisher scaphoid fracture classification
Evidence levels documentation tags
Evidence level tags for database use
ACEP Level C tag
Expert consensus management when evidence limited
Immobilize and arrange follow-up for high suspicion with negative radiographs
Class I tag
Strong recommendation based on consistent evidence or broad consensus
Immobilization and timely follow-up for suspected scaphoid fracture
Class IIa tag
Moderate recommendation favoring benefit
Early MRI for occult fracture when available
Class IIb tag
Weak recommendation with mixed evidence
Ultrasound as adjunct in select settings
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.