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Olecranon Fracture

Fracture of the proximal ulna involving the olecranon process, accounting for 10 percent of upper extremity fractures with bimodal distribution (high-energy in young, low-energy falls in elderly); disrupts the extensor mechanism of elbow (triceps insertion), causing inability to actively extend forearm; treatment depends on displacement — non-displaced treated with cast/brace, displaced require surgical fixation with tension band wiring or plate osteosynthesis.

Written by: Saygı Hospital Health Guide Editorial Board
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This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

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What is Olecranon Fracture?

Olecranon fracture is the breakage of the olecranon process, the bony prominence at the back of the elbow formed by the proximal portion of the ulna. The olecranon constitutes the most prominent posterior bony point of the elbow, fitting into the olecranon fossa of the humerus during elbow extension and articulating with the trochlear groove during flexion. It serves as the insertion of the triceps tendon, making it essential for the extensor mechanism of the elbow (analogous to the patella in the extensor mechanism of the knee).

Epidemiology and mechanisms: Olecranon fractures account for 8-10 percent of upper extremity fractures and 20 percent of fractures around elbow, with annual incidence 12 per 100,000 population. Bimodal age distribution with peaks in young adults (high-energy mechanisms — direct fall onto flexed elbow, motor vehicle accidents, sports injuries — football, hockey, basketball, snowboarding, falls from height) and elderly (low-energy mechanisms — simple falls from standing height in osteoporotic patients, particularly postmenopausal women). Direct trauma (fall onto point of elbow when flexed) is the most common mechanism (60-70 percent), followed by indirect trauma (forceful triceps contraction during fall to prevent extension — produces transverse fracture pattern).

Anatomy and biomechanics: Olecranon is a curved bony process at the proximal end of the ulna, articulating with the trochlea of the humerus. Its functions include: (1) providing stability to the ulnohumeral joint during elbow flexion-extension; (2) housing the insertion of the triceps tendon (the largest muscle of the upper extremity); (3) acting as a fulcrum for elbow extension. The articular surface is C-shaped (sigmoid notch), encompassing approximately 180° of the trochlea. Blood supply is from the ulnar nutrient artery and periosteal vessels; relatively well-vascularized compared to other forearm bones, with low rate of nonunion (1-2 percent). Surrounding structures vulnerable to injury include ulnar nerve (medial side, can be injured at fracture site or surgical exposure), radial nerve (less commonly), and brachial vessels (rare).

Classification systems: 1) Mayo Clinic classification — most commonly used, based on displacement and stability — Type I (non-displaced, < 2 mm displacement, stable, intact extensor mechanism) treated conservatively; Type II (displaced > 2-3 mm but stable elbow, intact extensor mechanism — patient can extend elbow against gravity) requires surgical fixation; Type III (displaced + unstable elbow with extensor mechanism disruption — patient cannot extend elbow against gravity) requires surgical fixation; subgroups A (non-comminuted) and B (comminuted) further subdivide each type; 2) Schatzker classification — based on fracture pattern (transverse, transverse-impacted, oblique, comminuted, oblique-distal, fracture-dislocation); 3) AO/OTA — type 21 (proximal forearm) — A (extra-articular), B (partial articular), C (complete articular); 4) Open vs closed (per Gustilo).

Symptoms

Severe pain at posterior elbow immediately after injury
Swelling and bruising over olecranon
Visible deformity (palpable gap, step-off, or depression)
Inability to actively extend elbow against gravity (key examination — loss of extensor mechanism)
Tenderness over olecranon on palpation
Visible bone with open wound (open fracture — common due to subcutaneous location with thin skin)
Crepitus on movement
Inability to extend elbow fully (limited active extension)
Numbness or tingling in 4th and 5th fingers (ulnar nerve injury — relatively common with olecranon fracture, 5-15 percent)
Decreased grip strength
Knife-like point felt at posterior elbow with separation

Risk Factors

Direct trauma to flexed elbow (fall on point of elbow, motor vehicle accident, contact sports — football, hockey, basketball)
Falls from height (occupational, recreational)
Sports injuries (boxing, mixed martial arts, gymnastics, snowboarding, skateboarding, skiing)
Workplace trauma (industrial, construction, agriculture)
Indirect trauma (forceful triceps contraction during fall to prevent extension)
Osteoporosis (postmenopausal women, elderly with vitamin D deficiency, prior fragility fracture)
Stress fractures in throwers (baseball pitchers, javelin throwers, gymnasts — repetitive triceps loading)
Pathologic fracture (rare — metastatic disease, primary bone tumor)
Female sex (osteoporosis-related fractures in elderly)
Age > 65 (osteoporotic fragility fractures)
Smoking (impairs bone healing, increases nonunion risk)
Diabetes mellitus (impaired healing)
Long-term corticosteroid use
Vitamin D deficiency
Polypharmacy with sedatives (fall risk in elderly)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Severe elbow pain after fall on elbow or trauma to point of elbow
  • Inability to extend elbow against gravity (loss of extensor mechanism)
  • Visible swelling, deformity, or bruising at back of elbow
  • Open wound over elbow with bone visible (CALL EMERGENCY 112)
  • Numbness or tingling in 4th and 5th fingers after elbow injury (ulnar nerve evaluation)
  • Decreased grip strength after elbow injury
  • Inability to use arm normally after recent injury
  • Persistent severe pain after elbow injury 24-48 hours
  • Cold or pale hand after recent elbow injury (vascular emergency)
  • Suspected dislocation in addition to fracture
  • Palpable gap or step-off at point of elbow

Treatment Methods

01
Initial assessment: detailed history (mechanism — direct vs indirect, timing, dominant arm, prior elbow problems, occupation, sports), physical examination (visible deformity, swelling, ecchymosis, palpation tenderness over olecranon, ability to actively extend elbow against gravity, range of motion of elbow, neurovascular examination — ulnar nerve sensation in 4th-5th fingers and motor function intrinsic hand muscles, radial nerve, median nerve, brachial pulse, capillary refill), assessment for open wound (subcutaneous location of olecranon makes open fractures more common — 5-10 percent of olecranon fractures), photograph wound, immediate splint with elbow in 60-90° flexion
02
Imaging: 1) AP and lateral X-rays of elbow — visualize fracture pattern (transverse most common 50 percent, oblique 25 percent, comminuted 25 percent), displacement (key for treatment decision), articular involvement, possible fracture-dislocation (Monteggia variant — proximal ulna fracture with radial head dislocation); axial view if needed; 2) CT scan with 3D reconstruction — for comminuted patterns, surgical planning, articular step-off measurement, intra-articular fragment characterization; 3) MRI — soft tissue evaluation if ligamentous injury suspected, occult fractures
03
Conservative management: indications — Mayo Type I (non-displaced, < 2 mm displacement, stable, intact extensor mechanism with full active extension against gravity); also for elderly low-demand patients with Type II/III who are not surgical candidates due to comorbidities (modified treatment with sling and early ROM accepting some loss of extension); technique — above-elbow cast or hinged elbow brace in 60-90° flexion for 3-4 weeks (Type I), partial weight-bearing protection, then progressive ROM exercises; expected union 6-8 weeks; weekly to bimonthly X-ray follow-up to confirm maintenance of position; complications include displacement during cast immobilization (5-10 percent — requires conversion to surgical management), elbow stiffness (very common in any prolonged immobilization), heterotopic ossification (5-15 percent)
04
Surgical management indications: Mayo Type II and Type III fractures (displaced > 2-3 mm or with extensor mechanism disruption), open fractures, fracture-dislocations, segmental fractures, irreducible fractures, polytrauma; timing — generally within 7-14 days of injury for optimal soft tissue handling; longer delays acceptable in polytrauma until stable
05
Surgical techniques: 1) Tension band wiring (TBW) — gold standard for transverse stable fractures (Mayo Type II non-comminuted); technique includes parallel longitudinal K-wires (1.6-2.0 mm) inserted from olecranon tip into proximal ulna shaft, figure-of-8 stainless steel wire (18 gauge) anterior to wires acting as tension band that converts tensile forces of triceps into compressive forces across fracture during elbow flexion; modified techniques with cannulated screws + tension band wire over screws improve fixation; complications include hardware prominence and pain (40-80 percent require eventual removal due to skin irritation and bursitis), wire breakage, displacement; 2) Plate and screw fixation — preferred for comminuted, oblique, or extending into ulna shaft fractures (Mayo Type IIB, Type III, Schatzker comminuted); pre-contoured olecranon plates (Synthes LCP olecranon plate, Acumed olecranon plate, Zimmer Trabecular Metal) provide multi-planar locking screws; advantages over TBW include rigid fixation with immediate motion, less hardware prominence, biomechanically superior for comminuted patterns; technique includes posterior approach, anatomic reduction with provisional K-wires, plate application with locking screws into proximal fragment and standard cortical screws into ulna shaft; 3) Intramedullary nailing or screw — single intramedullary screw for very simple transverse fractures in selected cases; 4) Fragment excision and triceps reattachment — for severely comminuted proximal olecranon fractures in elderly low-demand patients (loss of < 50 percent of olecranon); excise comminuted fragments, reattach triceps tendon to remaining olecranon with transosseous sutures or suture anchors; results in some loss of extension (5-10°) but preserves elbow function; 5) Total elbow arthroplasty (TEA) — for severely comminuted intra-articular fractures in elderly low-demand patients with osteoporosis, particularly when reconstruction not feasible; emerging indication with growing evidence
06
Open fracture management: emergency IV antibiotic prophylaxis (cefazolin for I/II, add gentamicin for III), tetanus prophylaxis, irrigation and debridement within 6-24 hours (Ostern golden hour philosophy debated but earlier better), removal of devitalized tissue and contamination, internal or external fixation depending on contamination level, soft tissue coverage with primary closure, advancement flap, or rotational flap (lateral forearm flap, latissimus flap)
07
Postoperative rehabilitation: 1) Phase 1 (0-1 week) — long-arm splint or hinged elbow brace, gentle finger and shoulder ROM, ice, elevation, pain control with multimodal analgesia (acetaminophen, NSAIDs, opioids initially, gabapentin, regional anesthesia infraclavicular block); 2) Phase 2 (1-4 weeks) — discontinue splint at 1 week if stable surgical fixation, progressive active and active-assisted ROM 30-90° flexion (avoiding full extension which stresses fixation), no resistance, sling between exercises, physical therapy 2-3x weekly; 3) Phase 3 (4-8 weeks) — progress ROM to full extension and flexion 0-130°, gentle isometric strengthening, occupational therapy for ADL; 4) Phase 4 (2-3 months) — resistance training (theraband, light weights), proprioception, functional activities; 5) Phase 5 (3-6 months) — return to sports and heavy manual work, sport-specific training; full recovery 6-12 months for complex fractures, 3-6 months for simple
08
Hardware removal: hardware-related complications very common in olecranon fractures due to subcutaneous location of plates and wires; 40-80 percent of patients with TBW require eventual removal due to symptomatic prominence, skin irritation, olecranon bursitis; plate removal also frequent (20-40 percent); typically performed at 6-12 months post-fixation when union confirmed radiographically; complications of removal include re-fracture (rare), persistent pain, infection
09
Long-term complications and management: 1) Loss of extension (10-30 percent of olecranon fracture patients have 5-15° loss of full extension — usually well-tolerated, occupational and ADL impact minimal); 2) Heterotopic ossification (5-25 percent — non-functional ossification around elbow, can limit ROM; surgical excision if significant ROM limitation, NSAID prophylaxis (indomethacin) and radiation post-surgery for high-risk patients); 3) Hardware complications (40-80 percent — removal commonly required); 4) Ulnar nerve dysfunction (5-15 percent — usually neuropraxia from initial trauma or surgery, recovery in 3-6 months; permanent in 2-5 percent — surgical decompression or transposition if persistent symptoms); 5) Post-traumatic arthritis (10-30 percent at 10+ years — particularly with intra-articular extension or step-off > 2 mm; conservative management with NSAIDs, intra-articular injections, eventual elbow arthroplasty if severe); 6) Stiffness (very common — minimize with early ROM after surgical fixation, consider arthroscopic capsular release if refractory > 6 months); 7) Nonunion (1-5 percent — relatively uncommon due to good blood supply; bone grafting and revision fixation); 8) Malunion (5-15 percent — rotational malunion can affect forearm rotation, surgical correction if symptomatic); 9) Infection (1-5 percent for closed surgery, 5-25 percent for open fractures); 10) Olecranon bursitis (chronic post-surgical due to hardware prominence — bursectomy and hardware removal)

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.