Ebook Diagnostic imaging of the foot and ankle: Part 2
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Ebook Diagnostic imaging of the foot and ankle: Part 2
Ebook Diagnostic imaging of the foot and ankle: Part 2
Chapter 4Midfoot4.14.2TraumaChronic, Posttraumatic, and Degenerative changes7311454 Midfoot4.1TraumaR. DeỊpven and u. SzcimicjAs described in the Inte Ebook Diagnostic imaging of the foot and ankle: Part 2egral Classification of Injuries (IC1). the midfont consists of a proximal row of bones formed by the navicular and cuboid and a distal row formed by rhe medial, inlet mediate. and lateral cutieifoiins. Ill the AO/ASIF (Aibeitsge-meinschafl ÍÙ1 Osleusynlhese I Association fol the Study of Internal F Ebook Diagnostic imaging of the foot and ankle: Part 2ixation) system, the Chopail joml (alsu called the midtarsal or transverse tarsal joint) defines rhe boundary line between the midfoot and hindfbor. aEbook Diagnostic imaging of the foot and ankle: Part 2
nd injuries to that joint are classified as midfoot injuries. The l-isfranc joint marks the distal boundary of the midfoot. and injuries to that jointChapter 4Midfoot4.14.2TraumaChronic, Posttraumatic, and Degenerative changes7311454 Midfoot4.1TraumaR. DeỊpven and u. SzcimicjAs described in the Inte Ebook Diagnostic imaging of the foot and ankle: Part 2olves the tarsometatarsal joint line, with or without articular dislocation. The joint was named after Jacques Lisfranc. who established the tarsometatarsal joint line as a level for foot amputations.1 NoteLisfranc fractures are among the most commonly missed severe foot injuries. They may alter the Ebook Diagnostic imaging of the foot and ankle: Part 2 bromechanics of the foot, lead ing to secondary degenerative elwnges and chronic pain.Not infrequently, dislocations have already reduced spontaneousEbook Diagnostic imaging of the foot and ankle: Part 2
ly by the time the foot is examined, and the patient presents with a severe capsulohgamentous disruption. Superimposed 01 unperceived signs and symptoChapter 4Midfoot4.14.2TraumaChronic, Posttraumatic, and Degenerative changes7311454 Midfoot4.1TraumaR. DeỊpven and u. SzcimicjAs described in the Inte Ebook Diagnostic imaging of the foot and ankle: Part 2rmalities should always prompt further investigation.Symptoms•Pain and swelling, piedommanlly affecting die medial column•Inability to stand on rhe toes•Limitation of morion•Flattening of the pedal arches•Shor telling of the fool•Possible compartment syndiomePredisposing FactorsNo specific predispos Ebook Diagnostic imaging of the foot and ankle: Part 2ing factors are known. In principle, any laxity of the capsule and ligaments may increase susceptibility to a Lisfranc injury.Anatomy and PathologyAnaEbook Diagnostic imaging of the foot and ankle: Part 2
tomy►Joints. Key anatomic landmarks for the Lisfranc joint line arc the tarsometatarsal joints between the cuneiforms, cuboid, and bases uf the melalaChapter 4Midfoot4.14.2TraumaChronic, Posttraumatic, and Degenerative changes7311454 Midfoot4.1TraumaR. DeỊpven and u. SzcimicjAs described in the Inte Ebook Diagnostic imaging of the foot and ankle: Part 2hiaidiruses that allow fui a small degree of spungy motion. The base of the second metatarsal, which extends proximally into the cuneiform row. acts as a ‘keystone” tn help stabilize rhe midfbot.►Ligaments. Tile plantar metatarsal ligaments mleicunnect die second through fourth metatarsals; there IS Ebook Diagnostic imaging of the foot and ankle: Part 2 no comparable connection between the first and second metatarsals. The lough l.isfranc ligament connects the first ray to the second ray. This ligameEbook Diagnostic imaging of the foot and ankle: Part 2
nt is approximately 1.5 cm X 0.5 cm thick and consists of two hands—one longitudinal and one oblique, arranged in a Y-slraped configuration. The LisfrChapter 4Midfoot4.14.2TraumaChronic, Posttraumatic, and Degenerative changes7311454 Midfoot4.1TraumaR. DeỊpven and u. SzcimicjAs described in the Inte Ebook Diagnostic imaging of the foot and ankle: Part 2es. The longitudinal arch of the foot is supported by ligaments (plantar calcaneonavicular ligament, plantar ligament. plantar aponeurosis) and by the flexor muscles. The transverse arch derives its ligamentous support from the plantar calcaneonavicular ligament and deep transverse metatarsal ligame Ebook Diagnostic imaging of the foot and ankle: Part 2nt. It receives most of its muscular support from portions of the posterior tibial tendon and peroneus longus muscle (“stirrup" function) and from theEbook Diagnostic imaging of the foot and ankle: Part 2
intrinsic muscles and plantar fascia, all of which interact dynamically to maintain the integrity of the plantar vault.► Vessels and nerves. The perfChapter 4Midfoot4.14.2TraumaChronic, Posttraumatic, and Degenerative changes7311454 Midfoot4.1TraumaR. DeỊpven and u. SzcimicjAs described in the Inte Ebook Diagnostic imaging of the foot and ankle: Part 2usceptible to injuries.PathologyIjsfranc fractures arc rare (0.22; of all fractures). They arc caused mainly by high-impact trauma-in motor vehicle accidents, for example-bul may also result from luw-eueigy trauma due to a stumble O1 fall (axial compiession trauma with die forefoot in a fixed positi Ebook Diagnostic imaging of the foot and ankle: Part 2on). Common associated injuries include lesions of rhe cuneiform bones and fractures of the calcaneocuboid joint, navicular, and metatarsal heads.MechEbook Diagnostic imaging of the foot and ankle: Part 2
anisms of Injury•Abduction injury: This mechanism involves forceful abduction of rhe forefoot while the hindfoot is fixed in place, causing lateral diChapter 4Midfoot4.14.2TraumaChronic, Posttraumatic, and Degenerative changes7311454 Midfoot4.1TraumaR. DeỊpven and u. SzcimicjAs described in the Inte Ebook Diagnostic imaging of the foot and ankle: Part 2).Chapter 4Midfoot4.14.2TraumaChronic, Posttraumatic, and Degenerative changes7311454 Midfoot4.1TraumaR. DeỊpven and u. SzcimicjAs described in the InteGọi ngay
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