Urgent orthopedics referral for early repair window
Suspected partial rupture
Imaging to quantify percent involvement
Concomitant bony injury on radiographs
Fracture pathway plus tendon pathway
Chronic presentation
Higher likelihood of retraction and need for reconstruction
History
Mechanism and timeline
Injury context
Sudden eccentric load against elbow extension
Fall on outstretched hand
Bench press or heavy triceps extension
Direct blow to posterior elbow
Laceration or contusion
Elbow dislocation event
Self-reduced history
Timing
Time since injury
<3 weeks operative timing relevance
Progressive swelling or bruising timeline
Delayed bruising typical
Symptoms
Posterior elbow pain
Extension weakness
Loss of push-off function
Audible pop sensation
Risk factors and modifiers
Patient factors
Chronic kidney disease and dialysis history
Diabetes mellitus
Rheumatoid arthritis or inflammatory arthropathy
Hyperparathyroidism history
Prior elbow surgery
Medication and exposure factors
Systemic corticosteroid exposure
Anabolic steroid exposure
Fluoroquinolone exposure
Functional baseline
Hand dominance
Occupation demands
Athletic demands
Physical Exam
Inspection and palpation
Local findings
Posterior elbow swelling
Ecchymosis pattern
Skin compromise
Abrasion
Open wound
Palpable gap proximal to olecranon
Increased suspicion for complete rupture
Deformity evaluation
Elbow alignment
Suspicion for dislocation or fracture
Function and special tests
Extensor mechanism function
Active elbow extension against gravity
Extension against resistance
Extension lag
Modified Thompson squeeze test
Lack of elbow extension with triceps squeeze
False negatives with partial tears
Neurovascular exam
Radial nerve motor and sensory
Ulnar nerve motor and sensory
Median nerve motor and sensory
Distal perfusion
PITFALLS
Missed partial rupture patterns
Preserved active ROM with reduced power
Pain-limited exam masking deficit
Missed associated injuries
Olecranon avulsion fragment on lateral view
Radial head fracture
Elbow dislocation with spontaneous reduction
Differential Diagnosis
Posterior elbow pain and extension weakness
Bone and joint injury
Olecranon fracture
ICD-10 compatible term
Elbow dislocation
Radial head fracture
Tendon and muscle injury
Triceps tendinopathy
Partial triceps tendon tear
Complete triceps tendon rupture
Neurologic causes
C7 radiculopathy
Ulnar neuropathy at elbow
Infectious and inflammatory mimics
Olecranon bursitis
Septic bursitis
Laboratory Tests
Routine testing strategy
Labs usually unnecessary
Isolated closed tendon rupture
Stable vitals
Preoperative pathway labs
Operative planning labs
Complete blood count for anemia or infection concern
Electrolytes and creatinine for anesthesia planning
Anticoagulation context
INR for warfarin exposure
aPTT only if heparin exposure concern
Special scenarios
Open injury or contaminated wound
White blood cell count for infection concern
Serum lactate only if systemic illness concern
Chronic disease context
Renal function trend for CKD or dialysis
Calcium and phosphate only if metabolic bone disease concern
Diagnostic Tests
Scoring Systems
Functional outcome instruments
Mayo Elbow Performance Score
Baseline documentation option
Follow-up outcome tracking option
QuickDASH
Baseline disability estimate
Follow-up disability estimate
Strength grading
MRC scale
Extension strength baseline
Post-treatment comparison
Radiographs
Plain radiography plan
Elbow radiographs
AP view
Lateral view
Key signs
Small olecranon avulsion fragment
Posterior fat pad sign
Associated injury screen
Olecranon fracture
Radial head fracture
Elbow dislocation alignment
MRI
MRI indications
Uncertain clinical diagnosis
Partial versus complete tear differentiation
Surgical planning
Retraction distance estimate
Tendon quality estimate
MRI interpretation targets
Percentage tendon involvement
>50% involvement threshold commonly used for operative consideration
Full-thickness discontinuity
Complete rupture confirmation
Concomitant soft tissue injuries
UCL injury
Olecranon bursitis or hematoma
CT
CT indications
Complex elbow fracture pattern on radiographs
Surgical planning for comminuted olecranon fracture
CT limits
Tendon integrity assessment inferior to MRI
Disposition
Consultation and follow-up timing
Orthopedics referral
Suspected complete rupture
Urgent referral for repair window
Partial rupture with significant weakness
Early referral for imaging-confirmed extent
ED discharge criteria
Pain controlled with oral regimen
Neurovascularly intact
No open wound
No unstable dislocation or fracture requiring admission
Admission or transfer triggers
Open injury needing operative washout
Neurovascular compromise
Irreducible elbow dislocation
Unstable fracture-dislocation
Activity restrictions and immobilization plan
Immobilization disposition items
Posterior long arm splint
Elbow near extension or slight flexion per local protocol
Sling support
Comfort and protection
Follow-up interval
Suspected complete rupture
2 to 5 days
Suspected partial rupture
5 to 10 days with imaging plan
Treatment
Immediate life-saving interventions
Immediate stabilization framework
Threatened limb perfusion
If absent distal pulses, immediate reduction if dislocation suspected
Immediate vascular consultation if persistent pulselessness
Open injury management
Sterile dressing
Antibiotics per open injury pathway
Analgesia strategy
Acetaminophen
1000 mg PO every 6-8 hours
Maximum 3000 mg/day typical outpatient target
Ibuprofen
400-600 mg PO every 6-8 hours
Avoid in high GI bleed risk or advanced CKD
Opioid for breakthrough pain
Hydromorphone 1-2 mg PO every 4-6 hours as needed
Avoid coadministration with sedatives
Procedural sedation readiness if reduction required
Continuous pulse oximetry
Capnography if available
Airway equipment at bedside
Resuscitation meds available
Immobilization and Splinting
Splint selection
Posterior long arm splint
Elbow position near extension or 20-30 degrees flexion
Forearm neutral rotation
Sling
Comfort and compliance support
Immobilization principles
Avoid active resisted elbow extension
Avoid weightbearing through arm
Neurovascular reassessment after splint
Post-splint checks
Motor
Finger extension
Finger abduction
Sensory
Median
Ulnar
Perfusion
Capillary refill
Distal pulses
Reduction
Reduction indications
Concomitant elbow dislocation
Neurovascular compromise
Severe deformity
Skin tenting
Reduction contraindications or caution
Suspected vascular injury with hard signs
Immediate specialist involvement
Open dislocation
Antibiotics and urgent operative pathway
Analgesia and anesthesia options
Intra-articular elbow anesthetic option
Local anesthetic dosing per institutional protocol
Procedural sedation option
Ketamine IV 1 mg/kg initial
Additional 0.5 mg/kg IV as needed
Emergence reaction mitigation plan
Continuous airway monitoring
Technique principles
Traction and countertraction
Gentle sustained force
Avoid repeated forceful attempts
Post-reduction requirements
Immediate neurovascular re-check
Post-reduction radiographs
Immobilization in stable position
Open fracture medications and timing
Antibiotics for open posterior elbow injury
Cefazolin IV 2 g
Repeat every 8 hours if ongoing inpatient care
Severe beta-lactam allergy
Clindamycin IV 900 mg
Repeat every 8 hours if ongoing inpatient care
Gross contamination concern
Add gentamicin per institutional protocol
Tetanus prophylaxis
Unknown or incomplete vaccination
Tdap
Tetanus immune globulin for high-risk wound per protocol
Wound care basics
Saline irrigation
Sterile dressing
Urgent orthopedics involvement
DVT prophylaxis when relevant
VTE considerations
Upper extremity immobilization alone
Routine pharmacologic prophylaxis usually not indicated
Postoperative or inpatient immobility
Pharmacologic prophylaxis per surgical service protocol
Special Populations
Pregnancy
Pregnancy considerations
Imaging
Radiographs acceptable with shielding as appropriate
MRI without gadolinium preferred for soft tissue detail
Analgesia
Acetaminophen preferred
NSAID avoidance in later pregnancy per obstetric guidance
Disposition
Obstetric consultation if trauma concerns beyond isolated elbow injury
Geriatric
Older adult considerations
Higher comorbidity burden
CKD and dialysis association with tendon rupture risk
Anticoagulation prevalence
Lower opioid tolerance
Delirium risk
Fall risk counseling
Surgical candidacy assessment
Frailty and anesthesia risk
Pediatrics
Pediatric considerations
True tendon rupture rarity
Apophyseal avulsion considerations near olecranon
Imaging
Radiographs for physeal and apophyseal injury
MRI if diagnosis uncertain
Management
Early pediatric orthopedics involvement
Protection of growth-related structures
Background
Epidemiology
Epidemiology summary
Rare injury
Approximately 0.8% of tendon ruptures reported in orthopedic summaries
Male predominance reported in series
Central Europe retrospective cohort male predominance around 90%
Incidence estimate example
0.46 cases per 100,000 inhabitants in one regional retrospective study
Pathophysiology
Mechanism and anatomy
Distal triceps insertion at olecranon
Rupture at tendon-bone junction common
Injury mechanics
Eccentric overload during attempted extension
Direct trauma with forced flexion
Associated injury patterns
Olecranon avulsion fragment
Elbow dislocation and collateral ligament injury
Therapeutic Considerations
Operative versus nonoperative rationale
Complete rupture
Primary repair commonly recommended
Early repair within about 3 weeks associated with easier repair and better outcomes in surgical series
Partial rupture
<50% involvement
Nonoperative trial considered in lower-demand patients
>50% involvement
Operative consideration common in reviews and series
Imaging selection rationale
Ultrasound
Differentiation of full versus partial tear reported with high sensitivity in radiology literature
MRI
Extent and retraction definition for planning
Complication awareness
Missed diagnosis leading to delayed reconstruction
Chronic tears more likely to need graft augmentation
Patient Discharge Instructions
Copy discharge instructions
Discharge instructions
Splint care
Keep splint clean and dry
Do not remove splint unless instructed
Activity restrictions
No lifting or pushing with the injured arm
Avoid active resisted elbow extension
Swelling control
Elevation above heart when possible
Ice 15-20 minutes at a time with skin protection
Pain plan
Acetaminophen as directed
Ibuprofen as directed unless contraindicated
Opioid only if needed for breakthrough pain
Follow-up
Orthopedics appointment within recommended interval
Imaging appointment if arranged
Return to ED now
Increasing pain not controlled with medication
New numbness or weakness in hand or fingers
Fingers becoming cold, pale, or blue
Splint feels too tight or increasing swelling with tingling
Fever or drainage from any wound
Recurrent deformity after reduction
References
Evidence-based sources and guidance
Key sources
van Riet et al
Early surgical repair within three weeks described as treatment of choice in surgical series
PubMed
EFORT Open Reviews 2016
Review summary of distal triceps rupture diagnosis and treatment approaches
AJR sonography study
Ultrasound performance for differentiating full versus partial tear reported with high sensitivity
Central Europe retrospective cohort 2024
Incidence estimate and operative threshold discussion around >50% fibers
OSU distal triceps repair clinical care guideline
Repair preferably within first three weeks statement
Orthobullets summary
MRI role for partial versus complete differentiation
Coding references
ICD-10 S46.3
Injury of muscle, fascia and tendon of triceps category
ICD-10 S46.312A
Strain of muscle, fascia and tendon of triceps, left arm, initial encounter
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