In the management of midfoot sprains with subtle diastasis, there is variation in treatment modes among the NFL team physicians, with 53% using nonoperative management (34% cam walker, 19% cast) and 47% suggesting operative management. Regardless of treatment, most physicians (97%) maintain initial non-weight-bearing restrictions. In fact, only 1 physician first recommended partial weight-bearing, which corresponded to initial treatment in a cam walker.
In terms of midfoot sprains with frank diastasis, 94% of the NFL team physicians indicated surgical management is warranted, with only 2 physicians (6%) recommending initial nonoperative management with a cam walker. Regardless of treatment, all the physicians (100%) implemented initial non-weight-bearing restrictions. Once surgical treatment was recommended, the preferred fixation method was ORIF using screws (94%) as opposed to closed reduction and internal fixation with percutaneous Kirschner wires (6%). Most of the physicians (59%) do not allow return to play until midfoot hardware is removed; however, 38% allow full participation with contact, and 3% allow partial participation with no contact. Removal of midfoot fixation is an important factor for most of the physicians before considering return to play, and 69% recommend hardware removal after 11 weeks. However, the specific timeline for hardware removal varied among these physicians, with 28% opting for removal at 11 to 12 weeks, 16% at 13 to 14 weeks, 12.5% at 7 to 8 weeks, 12.5% at 15 to 16 weeks, 12.5% at more than 16 weeks, 12.5% never, and 6% at 9 to 10 weeks.
The midfoot sprain treatment protocol (nonoperative vs operative management) based on injury severity was an important factor in considering return-to-play guidelines. When evaluating time lost from participation because of midfoot sprains, most of the NFL team physicians anticipated a period of 5 to 8 weeks when considering nonoperative management (56%) and more than 17 weeks after operative management (53%). In evaluating nonoperative management protocols, return-to-play guidelines were relatively expeditious, with 56% of the physicians estimating from 5 to 8 weeks, 22% from 1 to 4 weeks, 13% from 9 to 12 weeks, 6% from 13 to 16 weeks, and 3% longer than 20 weeks. In comparison to nonoperative management, return-to-play guidelines for operative management were prolonged, with 53% of the physicians estimating more than 20 weeks, 25% from 17 to 20 weeks, 13% from 13 to 16 weeks, and 9% from 9 to 12 weeks.
Discussion
Lisfranc and midfoot injuries remain a controversial topic in sports medicine. Several authors have argued that anatomical reduction of the tarsometatarsal joint in the setting of a Lisfranc injury yields optimal outcomes.15,16 Some studies have also suggested that purely ligamentous Lisfranc injuries may be more of a problem than bony injuries, which may have the benefit of osseous healing.15,17 Anatomical reduction can minimize the potential for arch collapse by maintaining the normal tarsometatarsal relationship. However, there are no long-term data to determine how midfoot arthrosis is affected by ORIF, which typically involves hardware traversing joints. Some have even argued that primary tarsometatarsal arthrodesis should be the treatment of choice, as the midfoot has limited native motion, and successful arthrodesis eliminates the potential for midfoot arthrosis.17,18 However, we are unaware of any studies that have routinely performed arthrodesis in an athletic population.
The majority of studies on midfoot injuries have evaluated individuals involved in traumatic accidents, most commonly motor vehicle collisions. The present study suggests there may be a subset of injuries in athletes that have yet to be adequately studied. Anecdotally, the NFL team physicians surveyed in our study suggested that midfoot sprains with no or subtle displacement may be treated with nonoperative measures while yielding satisfactory clinical outcomes. These results have been quantified in return-to-play status. Our subset of athletes from an NFL team corroborates these findings, even though the series was small (15 patients). Our survey results also suggest there is considerable variation in the “optimal” management plan among the physicians treating these elite athletes. Most would agree that the nondisplaced injuries can be managed conservatively and that the severely displaced injuries should be managed operatively, but the natural history of those injuries with subtle diastasis remains unclear. When operative intervention is implemented, hardware removal versus retention must also be considered when allowing for return to play. Although one would assume that motion-related hardware failure would be possible at the tarsometatarsal joints, this concept has yet to be clearly defined in the literature.
The present study also demonstrates that most athletes with these midfoot injuries can return to play at the elite NFL level, as evidenced by their short- and long-term return to play. However, it was not possible to differentiate the specific return-to-play level related to preinjury performance level. Furthermore, this relatively short-term NFL career follow-up study was not able to elucidate the long-term consequences of these injuries. In fact, arch collapse and acquired flatfoot deformity could eventually result from this injury, and long-term outcomes would be of particular interest in patients who have subtle diastasis and who are treated nonoperatively.