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Approach to the Critical Patient
Triage priorities
Stability screen
Airway
Breathing
Circulation
If syncope
Alternative diagnosis pathway
ECG
Glucose
If open wound
Open injury pathway
Antibiotics timing
Tetanus logic
Limb threat screen
Limb threat triggers
Neurovascular compromise
Dorsalis pedis pulse
Posterior tibial pulse
Capillary refill
Plantar sensation
Compartment syndrome concern
Pain out of proportion
Pain with passive toe extension
Tense plantar compartments
Skin compromise
Blanching
Threatened skin from swelling
Initial management bundle
Immediate measures
Analgesia early
Acetaminophen first line
NSAID if appropriate
Immobilization early
Walking boot
Plantar flexion slight
Weight bearing modification
Protected weight bearing
Crutches if severe pain
RICE
Rest
Ice
Compression if tolerated
Elevation above heart
Key concepts
Key concepts
Plantar fascia rupture is acute failure of plantar aponeurosis fibers
Typical pop sensation at medial plantar arch or heel
Acute plantar ecchymosis supports diagnosis
Missed associated injury risk
Calcaneal fracture
Midfoot Lisfranc injury
Achilles tendon rupture
Time dependent priorities
Neurovascular deficit triggers urgent escalation
Open injury triggers urgent antibiotics and tetanus
History
Mechanism and timeline
Mechanism timeline
Sudden push off sprint jump pivot
Pop sensation
Immediate plantar pain
Direct trauma to plantar arch
Crush mechanism
Laceration risk
Overuse background
Recent increase in running volume
Recent change in footwear
Time since injury
Minutes to hours onset
Delayed bruising within 24 to 48 hours
Risk factors and context
Risk factors
Prior plantar fasciitis
Morning start up pain history
Prior steroid injection
Fluoroquinolone exposure
Tendinopathy history
Concurrent corticosteroids
Foot biomechanics
Pes planus
Pes cavus
Systemic risks
Diabetes
Inflammatory arthritis
Obesity
Functional impact and red flags
Function and red flags
Weight bearing ability
Unable to bear weight
Antalgic gait
Neurologic symptoms
Numbness tingling plantar foot
Weak toe flexion
Vascular symptoms
Cold foot
Color change
Infection symptoms
Fever
Wound drainage
Physical Exam
Inspection and palpation
Local exam
Plantar ecchymosis
Medial arch bruising
Heel pad bruising
Swelling
Plantar arch swelling
Heel swelling
Point tenderness
Medial calcaneal tubercle region
Mid arch plantar fascia band
Palpable defect
Gap in plantar fascia
Tender nodularity at tear edge
Functional tests
Function tests
Windlass test
Pain with passive great toe dorsiflexion
Reduced arch tension compared with other side
Toe walking
Unable due to pain
Marked limp
Single leg heel raise
Limited by pain
Compare to contralateral side
Neurovascular and associated injury exam
Neurovascular and adjacent structures
Sensation
Medial plantar nerve distribution
Lateral plantar nerve distribution
Motor
Toe flexion strength
Intrinsic foot muscle activation
Pulses
Dorsalis pedis
Posterior tibial
Achilles tendon screen
Thompson test
Palpation for gap
Midfoot stability screen
Plantar midfoot ecchymosis
Tarsometatarsal tenderness
PITFALLS
Pitfalls
Ecchymosis may be delayed
Early exam can appear normal
Re exam instructions within 24 hours if worsening
Plantar fasciitis flare mimic
Rupture more likely pop and bruising
Acute swelling more supportive of rupture
Missed Lisfranc injury
Plantar bruising and midfoot pain triggers imaging and ortho follow up
Differential Diagnosis
Traumatic and structural
Traumatic and structural
Calcaneal fracture
Axial load fall history
Heel squeeze pain
Metatarsal stress fracture
Focal dorsal tenderness
Pain with forefoot loading
Lisfranc injury
Plantar midfoot ecchymosis
Pain with midfoot stress
Achilles tendon rupture
Positive Thompson test
Weak plantar flexion
Plantar plate tear
MTP joint plantar pain
Drawer test at toe
Soft tissue and inflammatory
Soft tissue and inflammatory
Plantar fasciitis
Chronic morning pain
No acute bruising
Heel fat pad contusion
Central heel pain
Pain with direct heel strike
Tarsal tunnel syndrome
Burning paresthesia
Tinel sign at tarsal tunnel
Posterior tibial tendinopathy
Medial ankle pain
Too many toes sign
Serious mimics
Serious mimics
Foot compartment syndrome
Pain out of proportion
Tense swelling
Infection
Cellulitis
Necrotizing soft tissue infection
DVT
Calf swelling tenderness
Risk factors for thrombosis
Laboratory Tests
Routine testing
Routine labs
No routine labs for isolated closed plantar fascia rupture
Clinical diagnosis common
Imaging driven when fracture concern
Targeted labs when indicated
Targeted labs
If open wound
CBC for infection concern
CRP for infection concern
If systemic illness
Electrolytes for dehydration or illness
Creatinine for NSAID safety
If surgery possible
CBC for baseline
INR if anticoagulants
Type and screen for operative pathway
Interpretation and pitfalls
Interpretation
Normal labs do not exclude infection early
Early cellulitis may have normal CBC
Clinical progression more important
CK not useful for isolated rupture
Use only if crush injury or prolonged ischemia
Diagnostic Tests
Scoring Systems
Decision tools
Ottawa ankle and foot rules
Midfoot pain
Navicular bone tenderness
Base of 5th metatarsal tenderness
Inability to bear weight
Four steps in ED or clinic
Four steps immediately after injury
Ankle pain
Posterior edge or tip lateral malleolus tenderness
Posterior edge or tip medial malleolus tenderness
Radiographs
X ray evaluation
Indications
Ottawa rule positive
High energy mechanism
Focal bony tenderness
Views
Foot three view series
Ankle three view series if ankle pain
Key findings to assess
Calcaneal fracture lines
Avulsion fragments at calcaneal insertion
Midfoot alignment
MRI
MRI evaluation
Indications
Persistent severe pain with normal X ray
Elite athlete return to sport planning
Suspected complete rupture with retraction
Typical findings
High signal discontinuity of plantar fascia
Adjacent soft tissue edema
Partial thickness tear pattern
CT
CT evaluation
Indications
Suspected occult calcaneal fracture with normal X ray
Suspected complex midfoot injury for surgical planning
Utility limits
Soft tissue tear characterization inferior to MRI
Radiation exposure consideration
Disposition
Discharge versus admission
Disposition decision
Discharge criteria
Pain controlled with oral meds
Neurovascularly intact foot
No fracture or unstable injury on imaging
Admission criteria
Uncontrolled pain
Neurovascular compromise
Suspected compartment syndrome
Open injury requiring OR or IV antibiotics
Follow up timing
Follow up plan
Podiatry or orthopedics
Within 3 to 7 days for suspected complete rupture
Within 1 to 2 weeks for partial rupture improving
Physiotherapy
After acute pain phase
Guided return to loading
Transfer triggers
Transfer criteria
Compartment syndrome concern
Immediate surgical evaluation
No delay for imaging
Open fracture or major midfoot instability
Higher level center if local resources limited
Treatment
Immediate life-saving interventions
Life threatening alternatives
If compartment syndrome concern
Emergent ortho consult
NPO status
If open injury
Antibiotics within 1 hour when feasible
Tetanus prophylaxis
Immobilization and Splinting
Immobilization strategy
Walking boot
Neutral to slight plantar flexion
Heel lift optional for comfort
Posterior short leg splint
If pain severe or swelling significant
If non weight bearing planned
Non circumferential casting avoidance
Swelling phase risk
Compartment syndrome masking risk
Reduction
Reduction considerations
Reduction not applicable for isolated plantar fascia rupture
Focus on exclusion of fracture dislocation
Midfoot injury reduction only if dislocation present
Open fracture medications and timing
Open injury pathway
Antibiotics by contamination
Clean low contamination
Cefazolin IV
Typical adult dose 2 g
Severe contamination or farm injury
Add gram negative coverage per local protocol
Add anaerobe coverage per local protocol
Tetanus prophylaxis
Unknown or incomplete immunization
Tetanus toxoid vaccine
Tetanus immune globulin for high risk wounds
DVT prophylaxis when relevant
Thrombosis considerations
Routine prophylaxis not indicated for most ambulatory boot patients
Consider risk stratification
Local protocol alignment
High risk features
Prior VTE
Active cancer
Major immobility
Hormonal therapy
Analgesia and symptom control
Pain control
Non opioid first line
Acetaminophen oral
Adult dose 650 mg to 1000 mg
Interval 6 to 8 hours
Maximum 3000 mg per day typical outpatient
Ibuprofen oral
Adult dose 400 mg to 600 mg
Interval 6 to 8 hours
Maximum 2400 mg per day typical outpatient
Naproxen oral
Adult dose 250 mg to 500 mg
Interval 12 hours
Maximum 1000 mg per day
Topical option
Diclofenac gel
Local dosing per product label
Avoid on broken skin
Opioid rescue
Severe pain short course only
Avoid if sedation risk
Constipation and driving cautions
Rehabilitation and return to activity
Rehab pathway
Acute phase first 1 to 2 weeks
Protected weight bearing
Boot use most of day
Subacute phase
Gradual wean from boot as pain allows
Calf and plantar fascia stretching progression
Strength and mechanics
Intrinsic foot strengthening
Calf strengthening
Gait retraining
Return to sport
Pain free walking before jogging
Gradual load progression over weeks
Special Populations
Pregnancy
Pregnancy considerations
Analgesic selection
Acetaminophen preferred
NSAID avoidance in later pregnancy per obstetric guidance
Imaging selection
X ray if fracture concern with shielding
MRI without gadolinium if needed
Thrombosis risk
Immobilization increases VTE risk
Obstetric consultation for prophylaxis decisions
Geriatric
Geriatric considerations
Fragility fracture overlap
Low energy mechanism with heel pain triggers fracture evaluation
Osteoporosis risk assessment
Skin integrity
Boot pressure injury risk
More padding and frequent skin checks
Medication safety
NSAID renal GI risk higher
Opioid delirium risk higher
Pediatrics
Pediatric considerations
Rarity of true plantar fascia rupture
Apophyseal injuries and fractures more likely
Calcaneal apophysitis differential
Imaging threshold
Lower threshold for X ray with limp
Growth plate injury consideration
Activity modification
Sport restriction until pain free walking
School gym notes
Background
Epidemiology
Epidemiology
Uncommon injury
Often in athletes
Often with prior plantar fasciitis
Steroid injection association
Increased rupture risk after local corticosteroid injection
Counsel about recurrence and rupture risk
Pathophysiology
Pathophysiology
Plantar fascia role
Supports medial longitudinal arch
Windlass mechanism during toe dorsiflexion
Rupture mechanism
Acute tensile overload during push off
Degenerative changes predispose to tearing
Common tear location
Proximal medial band near calcaneal origin
Mid substance tears less common
Therapeutic Considerations
Therapeutic considerations
Conservative care success common
Immobilization then progressive loading
Symptom guided return to activity
Surgery uncommon
Consider for complete rupture with significant retraction
Consider for persistent disability after prolonged conservative care
Injection considerations
Corticosteroid injection generally avoided after rupture
Prior injections increase rupture risk counseling
Evidence levels
Conservative management supported by observational evidence
Surgical repair evidence limited to case series
Patient Discharge Instructions
copy discharge instructions
Discharge instructions
Boot use
Wear boot for walking
Remove for hygiene if allowed and safe
Weight bearing
Protected weight bearing as tolerated
Crutches if pain with steps
Elevation and ice
Elevate foot above heart when resting
Ice 15 to 20 minutes at a time
Pain medicines
Acetaminophen as directed
NSAID only if safe for kidneys stomach and bleeding risk
Activity
No running jumping sports until cleared
Gradual return once walking is pain free
Return to ED now
Increasing pain not controlled
New numbness tingling or weakness
Pale cold foot or color change
Rapid swelling or severe tightness
Fever or spreading redness
Wound drainage or open wound
Follow up
Podiatry or orthopedics within 3 to 7 days
Earlier if worsening symptoms
References
Clinical guidelines and evidence
Sources
Ottawa ankle and foot rules original derivation and validation literature
Imaging decision support for ankle and midfoot injury
High sensitivity for clinically significant fractures in studied populations
Sports medicine reviews on plantar fascia rupture
Conservative management typical pathway
Imaging role for unclear cases
Orthopedic and podiatry texts on plantar fascia disorders
Anatomy and windlass mechanism
Rehabilitation progression principles
Steroid injection risk literature for plantar fascia rupture
Association between corticosteroid injection and rupture risk
Counseling importance before injection
Coding systems
Coding references
ICD 10 CM plantar fascia rupture
Use injury site and laterality specific code per local coding guidance
Use external cause codes when required
SNOMED CT plantar fascia rupture concept
Document laterality when available
Document acute traumatic versus spontaneous context
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.