patella and olecranon fracturesanatomy of the proximal ulna • beware of the bow of the proximal...
TRANSCRIPT
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Trauma 101May 12, 2018
Kyle J. JerayProfessor
University of South CarolinaGreenville, South Carolina
Olecranon Fractures
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I have no potential conflicts with this presentation
My disclosures –Editorial board JOT and JBJS Am; Reviewer JBJS, JOT, JAAOS; Consultant for Zimmer,
Radius; ABOS Oral Board Examiner; Chairman of AOA/Own the Bone Committee; Research support from Department of Defense, CIRH, NIH, AO North
America, OTADepartment has received funds for educational
support from Smith & Nephew, Zimmer, Synthes, Stryker
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Mechanism of Injury• Acute Tension overload: Tension applied by
the triceps with flexion of the elbow.
• Direct Trauma
• Chronic overload: stress fracture, osteopenia, pediatric injuries.
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Evaluation
• Check integrity of skin• Check extension of elbow• Evaluate neurovascular status, especially
ulnar nerve• X-rays in three views (AP, Lateral,
Oblique: -shows radial head in profile)
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Imaging
AP View Lateral ViewOblique View (sometimes helpful, good for Radial Head)
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Classification
Numerous classifications:
ColtonMorrey
SchatzkerAO/ASIF
OTA
CriteriaDisplacement
Direction of fractureDegree of
comminutionPercent involvementAssociated injuries
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•Type I: Nondisplaced 12%
•Type II: Displaced/ elbow stable 82%
•Type III: Elbow unstable 6%
•Both types II and III subdivided into:–A: noncomminuted
–B: comminuted
Mayo Clinic Classification
Morrey BF, JBJS 77A: 718-21, 1995
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Treatment Objectives
• Restoration of the articular surface.• Restoration and preservation of the
elbow extensor mechanism.• Restoration of elbow motion and
prevention of stiffness• Goal is to begin early ROM
• Prevention of complications.
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Treatment Methods• Nonoperative
• Renewed interest (especially elderly)• Non-displaced with intact elbow extension
• Operative• Open reduction and internal fixation
• Tension band wire with pins or intramedullary screws
• Plate• Excision of olecranon and triceps repair
• Comminuted, unreconstructable fractures• Elderly patients
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Nonoperative Treatment
• Nondisplaced fractures (age dependent!)
• Long arm cast - complicated by stiffness
• Long-arm splint for 7-10 days followed by functional bracing for 4-6 weeks • complicated by loss of reduction• Goal to start motion! Less about
displacement!
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Indications for Surgery
• Disruption of extensor mechanism • Unable to actively
extend elbow
• Articular incongruity• Any displaced fracture
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Patient Positioning – Which One?
• Supine
• Prone
• Lateral
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Supine With Imaging
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Lateral
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Prone Position
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Approaches to Elbow:
Patient Position
Note flexion may be limited here versus lateral
Prone Positioning
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Olecranon Excision
•Elderly patients–those with osteoporosis –involving <50% of joint
•Re-attach triceps anteriorly–At joint surface
•No difference in isometric strength but fewer complications in the excision group
Gartsman et al, JBJS 63A:718, 1981
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ORIF: Surgical Technique
• Evaluate comminution of dorsal cortex• If intact: tension band wire
appropriate• If comminuted, plate
appropriate• Evaluate orientation of
fracture line• Transverse: tension band
wire• Oblique, complex plate
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*Tension band: prerequisites for use:
Fractured bone must be eccentrically loaded
Implant must be on tension side
Bone must be able to withstand the compressive forces (comminution bad)
Far cortex must be intact
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The tension band converts the distracting force into a compressive force
Tension band principles
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JTC 2010
Tension Band Wire
Place K-wires across fracture -engage anterior cortex
Pass Tension wire deep to tendon with angiocath – two knots over dorsal cortex
From Hak and Golladay, JAAOS, 8:266-75, 2000
Reduce fracture
-hold with tenaculum
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Pull and twist to properly coil and tension
Drill hole for tension band bicortical
Less likely to fracture out
Tension band as close to bone tendon interface as possible, under triceps
Olecranon fractures: pearls for tension band use
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• Tension band applied around a large fragment screw
Simple Olecranon fractures
****Tension band wire as close to bone tendon interface as possible
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JTC 2010
Case Example -Transverse Fracture
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JTC 2010
Engage anterior cortex
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Intramedullary Screw ?• Need to add tension
band wire
• Long/large screw required• 6.5mm cancellous
• 85-110 mm long
Beware of Mal-reduction!
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JTC 2010
Anatomy of the Proximal Ulna
• Beware of the bow of the proximal ulna, which may cause a medial shift of the tip of the olecranon if a long screw is used.
From Hak and Golladay, JAAOS, 8:266-75, 2000
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Complex Olecranon fractures
Some examples and solutions….
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Conversion of a complex pattern into a simple pattern – then tension band
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Joint depression: elevate, graft, and mini fixation prior to tension band
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Plate Fixation• Use for
comminuted fractures, fractures with shaft extension, or oblique fracture line:
• DCP
• Plates designed for proximal Ulna
• Screw placement crucial for stability
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Tension side comminuted: use of a plate to maintain reduction, resisting tension by restoring
an intact tension side “cortex”
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Complex Olecranon Fracture
As fracture becomes more distal and oblique- more amenable to plate fixation
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Plate Fixation
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Locking plate fixation may also be used
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Olecranon Fractures•Peri-plate locking?
•What is the problem with this fixation?
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12 weeks post-op
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Summary of goals
Restore articular congruity
Achieve absolute stability
Allow early motion
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Summary of treatment
• Convert complex patterns to simple patterns whenever possible
• Excision and tendon repair for un-reconsructable fragments
• Elderly low demand closed tx with early motion
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Thank you