MEDRADSC 2I03 Lecture Notes - Lecture 19: Carpometacarpal Joint, Joint Dislocation, Maxillary Sinus
Document Summary
Fracture of one of metacarpals: commonly 5th mc. Typically transversely across neck of bone: usually at night time -> punching, mechanism: direct blow w clenched fist, best demonstrated on oblique hand, depending on severity - may require casting, pin placement. To avoid permanent damage-tendon action, peudo-clawing (bent finger) Splints to hold position for bone growth. Bennet"s: base of first metacarpal (thumb, carpometacarpal joint -> could fracture trapezium too. Intra articular fracture - surface of bone affected. Pott"s fracture: both malleoli + joint dislocation, due to mechanism of injury - one side is transverse, other is oblique or spiral. If both fractured -> nothing holding talus in place -> dislocation. Trimalleolar: both malleoli + posterior lip of tibia, represent fracture and dislocation. Fracture above condyles of a bone: usually humerus - supracondular ridges. Sometimes damage to brachial artery (from fragment: often children - abused, twisting motion of flinging arm, can be subtle radiographically -> anterior and posterior fat pad signs (sailboat)