Patient-Reported Outcomes of Concomitant Deltoid and/or Syndesmotic Reconstruction With Broström for Global Chronic Ankle Instability: The Role of Deltoid Stability.
Hadley Steven M SM, Durudogan Eric H EH, Bergman Rachel R, Westvold Sarah J SJ et al.
Medial and syndesmotic instability are risk factors for failure to return to pre-injury activity following Broström. This investigation aims to understand the extent to which superficial deltoid reconstruction (DR) and/or syndesmotic reconstruction (SR) affect global ankle stability in patients with global chronic ankle instability (GCAI) as measured by the validated Cumberland Ankle Instability Tool (CAIT) and Patient-Reported Outcomes Measurement Information System (PROMIS). All 574 patients who underwent lateral ankle ligament reconstruction at a single institution (2013-2024) were retrospectively reviewed. Revisions, allografts, nonanatomic reconstructions, flexor digitorum longus transfers, progressive collapsing foot deformity, hindfoot arthrodesis, ankle arthroplasties, fractures, those without minimum 1-year follow-up, and those who did not complete preoperative CAIT were excluded. Forty-three of 71 patients with concurrent deltoid and/or syndesmotic injury completed postoperative PROMIS/CAIT. GCAI was determined via history, examination, imaging, and intraoperative findings. Primary outcome was postoperative change in CAIT. For patients who underwent concomitant DR (13/43), the mean CAIT score improved by 16.0 ± 8.9 points (P < .001). The mean PROMIS physical function (PF) was 53.8 ± 6.8, the mean PROMIS pain interference (PI) was 46.7 ± 8.5, and the mean postoperative CAIT score was 22.0 ± 7.8. For those who had SR (16/43), the mean CAIT improved by 8.0 ± 12.6 (P = .02). The mean PROMIS PF, PI, and postoperative CAIT scores among those who underwent associated SR were 49.3 ± 8.2, 51.3 ± 8.9, and 16.0 ± 9.1, respectively. For patients who underwent both SR and DR (14/43), average CAIT improved by 17.7 ± 7.0 (P < .001). Mean PF, PI, and postoperative CAIT were 51.9 ± 6.3, 48.2 ± 6.7, and 22.3 ± 7.0, respectively. Change in CAIT was significantly higher in DR and DR+SR compared to SR alone (P = .05). Concomitant DR/SR in patients undergoing Broström may be associated with significant improvements in ankle stability from preoperative baseline. Those with DR and DR+SR had the largest improvements in CAIT, which may suggest the role of deltoid stability in GCAI. Therefore, addressing global stability should be considered in some GCAI patients. Level III, retrospective comparative study.