Prediction of Midfoot Instability in the Subtle Lisfranc Injury Comparison of Magnetic Resonance Imaging with Intraoperative Findings

被引:98
作者
Raikin, Steven M. [1 ]
Elias, Ilan [1 ]
Dheer, Sachin [2 ]
Besser, Marcus P. [3 ]
Morrison, William B. [2 ]
Zoga, Adam C. [2 ]
机构
[1] Thomas Jefferson Univ Hosp, Rothman Inst, Philadelphia, PA 19107 USA
[2] Thomas Jefferson Univ Hosp, Dept Radiol, Philadelphia, PA 19107 USA
[3] Thomas Jefferson Univ Hosp, Human Performance & Gait Lab, Philadelphia, PA 19107 USA
关键词
TARSOMETATARSAL JOINT; FRACTURE-DISLOCATION; DIAGNOSIS; LIGAMENT; ANATOMY; COMPLEX; TRAUMA; FOOT;
D O I
10.2106/JBJS.H.01075
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
Background: The objective of the present study was to assess the utility of magnetic resonance imaging for the diagnosis of an injury to the Lisfranc and adjacent ligaments and to determine whether conventional magnetic resonance imaging is a reliable diagnostic tool, with manual stress radiographic evaluation with the patient under anesthesia and surgical findings being used as a reference standard. Methods: Magnetic resonance images of twenty-one feet in twenty patients (ten women and ten men with a mean age of 33.6 years [range, twenty to fifty-six years]) were evaluated with regard to the integrity of the dorsal and plantar bundles of the Lisfranc ligament, the plantar tarsal-metatarsal ligaments, and the medial-middle cuneiform ligament. Furthermore, the presence of fluid along the first metatarsal base and the presence of fractures also were evaluated. Radiographic observations were compared with intraoperative findings with respect to the stability of the Lisfranc joint, and logistic regression was used to find the best predictors of Lisfranc joint instability. Results: Intraoperatively, seventeen unstable and four stable Lisfranc joints were identified. The strongest predictor of instability was disruption of the plantar ligament between the first cuneiform and the bases of the second and third metatarsals (the pC1-M2M3 ligament), with a sensitivity, specificity, and positive predictive value of 94%, 75%, and 94%, respectively. Nineteen (90%) of the twenty-one Lisfranc joint complexes were correctly classified on magnetic resonance imaging; in one case an intraoperatively stable Lisfrancioint complex was interpreted as unstable on magnetic resonance imaging, and in another case an intraoperatively unstable Lisfranc joint complex was interpreted as stable on magnetic resonance imaging. The majority (eighteen) of the twenty-one feet demonstrated disruption of the second plantar tarsalmetatarsal ligament, which had little clinical correlation with instability. Conclusions: Magnetic resonance imaging is accurate for detecting traumatic injury of the Lisfranc ligament and for predicting Lisfranc joint complex instability when the plantar Lisfranc ligament bundle is used as a predictor. Rupture or grade-2 sprain of the plantar ligament between the first cuneiform and the bases of the second and third metatarsals is highly suggestive of an unstable midfoot, for which surgical stabilization has been recommended. The appearance of a normal ligament is suggestive of a stable midfoot, and documentation of its integrity may obviate the need for a manual stress radiographic evaluation under anesthesia for a patient with equivocal clinical and radiographic examinations.
引用
收藏
页码:892 / 899
页数:8
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