Flatfoot deformity associated with increased risks of falls, complications after THA
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Key takeaways:
- Flatfoot deformity was associated with increased risks of falls, implant complications and revision after THA.
- Flatfoot deformity was also associated with dislocation, loosening and periprosthetic fracture.
According to published results, flexible pes planovalgus, also known as flatfoot deformity, was associated with increased risks of falls, implant-related complications and revision surgery among patients undergoing total hip arthroplasty.
Researchers performed retrospective review of a private insurance claims database to analyze outcomes of 3,622 patients with congenital or acquired flatfoot deformity and 18,094 matched control patients who underwent THA from 2010 to 2021.
Researchers found patients with flatfoot deformity had significantly increased rates of falls (6.93% vs. 2.97%) and significantly shorter time to revision (190 days vs. 554 days) compared with control patients.
In addition, patients with flatfoot deformity had significantly greater risks for dislocation (OR = 1.89), mechanical loosening (OR = 2.43) and periprosthetic fracture (OR = 2.43) compared with control patients. Researchers noted patients with flatfoot deformity also had significantly increased rates of proximal humerus fractures, but not distal radius fractures, compared with control patients.
Researchers noted altered anatomy in the flatfoot may lead to unevenly dispersed forces, imbalance and subsequent falls, especially on stairs or uneven surfaces. They also noted mechanical limb malalignment and altered biomechanics in the flatfoot may lead to abnormal stress and motion on hip implants.
“The findings of this study may allow orthopedic surgeons to be more attentive to identifying those patients at risk and allow for more educated patient counseling and operative planning,” the researchers wrote in the study.
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