Metacarpophalangeal dislocation (finger): Difference between revisions
m (Rossdonaldson1 moved page Metacarpophalangeal (MCP) dislocation (finger) to Metacarpophalangeal dislocation (finger)) |
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==Background== | ==Background== | ||
*Also known as the MCP joint | *Also known as the MCP joint | ||
*Usually | *Usually forces that rupture volar plate cause dorsal dislocation | ||
==Clinical Features== | ==Clinical Features== | ||
*Mechanism: hyperextension | |||
*Finger pain/deformity | |||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
| Line 28: | Line 30: | ||
==Disposition== | ==Disposition== | ||
*Outpatient | *Outpatient management | ||
==See Also== | ==See Also== | ||
Revision as of 11:31, 16 October 2016
Background
- Also known as the MCP joint
- Usually forces that rupture volar plate cause dorsal dislocation
Clinical Features
- Mechanism: hyperextension
- Finger pain/deformity
Differential Diagnosis
Hand and finger dislocations
- Finger dislocations
- Thumb dislocations
- Hand dislocations
Evaluation
Types
- Simple: subluxation
- Joint appears hyperextended to 60-90 deg
- Complex: dislocation
- MCP joint is in moderate hyperextension with metacarpal head prominent in palm
- Volar plate is interposed in MCP joint space
- X-ray may show seasamoid within joint space (pathognomonic)
- Closed reduction is not possible
Management
Reduction
- Do NOT hyperextend joint (may convert subluxation into complete dislocation)
- Flex the wrist to relax the flexor tendon
- Apply pressure over dorsum of proximal phalanx in distal and volar direction
Splinting
- Splint with MCP joint in flexion
- Refer to hand surgeon
Disposition
- Outpatient management