Multicenter study of complications following surgical dislocation of the hip.
ABSTRACT Surgical hip dislocation enables complete exposure of the hip joint for treatment of various hip disorders.There is limited information regarding the complications associated with this procedure. Our purpose is to report the incidence of complications associated with surgical dislocation of the hip in a large, multicenter patient cohort.
A retrospective, multicenter analysis of patients who had undergone surgical hip dislocation was performed.Patients who had undergone a simultaneous osteotomy were excluded. Complications were recorded, with specific assessment for osteonecrosis, trochanteric nonunion, femoral neck fracture, nerve injury, heterotopic ossification, and thromboembolic disease. We graded complications with a validated classification scheme that includes five grades based on the treatment required to manage the complication and any long-term morbidity. With this classification, a Grade-I complication is one that requires no change in the routine postoperative course, Grade II requires a change in outpatient management, Grade III requires invasive surgical or radiologic management, Grade IV is associated with long-term morbidity or is life-threatening,and Grade V results in death.
The study included 334 hips in 302 patients seen at eight different North American centers. There were eighteen complications (5.4%) that were classified as Grade I (not clinically relevant and required no deviation from routine postoperative care). There were six complications (1.8%) classified as Grade II (treated on an outpatient basis or with close observation and resolved). There were nine complications (2.7%) classified as Grade III (treatable and resolved with surgery or inpatient management). There was one complication (0.3%) classified as Grade IV (resulting in a long-term deficit). A total of thirty hips had one or more complications, for an overall incidence of 9%. Excluding heterotopic ossification, the complication rate was sixteen (4.8%) of 334.
Surgical hip dislocation is a safe procedure with a low complication rate. Many of the complications were clinically unimportant heterotopic ossification. There were no cases of femoral head osteonecrosis or femoral neck fracture, and, with the exception of one sciatic neurapraxia that partially resolved, no other complication resulted in long-term morbidity.
[Show abstract] [Hide abstract]
ABSTRACT: Reliable classification of postoperative complications is important for quality improvement efforts. In 2014, The Knee Society proposed a grading system for complications after TKA, but to our knowledge, a relationship between complication grades and surgical outcomes has not yet been established. We attempted to determine (1) whether an association exists between complication grade and early adverse outcomes after TKA and THA, and (2) what proportion of the variability in complications could be associated with the classification grade (a metric of potential predictive value of the grading schema). A total of 210 primary THAs and TKAs in 201 patients performed at one center from January 1, 2011 to December 31, 2011 were reviewed; of those, 188 patients (94%; 197 procedures) had complete 90-day postoperative data and were evaluated retrospectively for postoperative complications. We defined and graded complications according to the classification system proposed by Iorio et al. and The Knee Society. Early adverse outcomes assessed included length of hospital stay and unplanned readmissions or reoperations. A total of 254 complications were documented in 135 patients (137 procedures); 53 patients (60 procedures) had no complications. Bivariate analyses were conducted to identify associations between complication grade and early adverse outcomes and patient variables; analyses considered patient variables including age, sex, status as a state prisoner (yes or no), American Society of Anesthesiologists score, BMI, and procedure (TKA or THA). Multiple regression and logistic regression analyses were conducted to determine the association between complication grade and early adverse outcomes (length of stay [LOS] and unplanned readmission or reoperations) adjusted for confounding patient variables. Alpha was set at 0.05 for two-sided tests. Maximum complication grade (range, from 0-4) was associated with a longer LOS (for each point increase of maximum grade, LOS increased 0.105 ± 0.024 days, p < 0.001) and more readmissions or reoperations (odds ratio [OR], 3.79; 95% CI, 1.91-7.54; p < 0.001). Total grade (range, 0-22) also was associated with increased LOS (for each point increase of total grade, LOS increased 0.032 ± 0.006 days, p < 0.001) and increased readmissions or reoperations (OR, 1.34; 95% CI, 1.18-1.53; p < 0.001). Total grade could account for 38% of the variation in LOS and readmissions or reoperations (C-statistic = 0.94; 95% CI, 0.90-0.98); whereas maximum complication grade could account for 35% of the variation in LOS and readmissions or reoperations (C-statistic = 0.35; 95% CI, 0.88-0.96). Thus, we found total grade to be a slightly better predictor of LOS and readmissions or reoperations than maximum grade. We found that the proposed grading system is applicable to TKA and THA in terms of documentation of complication severity and as an indicator of increased LOS and increased unplanned readmissions or reoperation rates. That total complication grade was a better predictor of LOS than maximum grade suggests that multiple complications of a lesser grade can be just as important as a single higher grade complication in terms of effect on outcomes.Clinical Orthopaedics and Related Research 11/2014; 473(4). DOI:10.1007/s11999-014-4058-z · 2.88 Impact Factor
[Show abstract] [Hide abstract]
ABSTRACT: Severe femoral head deformities in the frontal plane such as hips with Legg-Calvé-Perthes disease (LCPD) are not contained by the acetabulum and result in hinged abduction and impingement. These rare deformities cannot be addressed by resection, which would endanger head vascularity. Femoral head reduction osteotomy allows for reshaping of the femoral head with the goal of improving head sphericity, containment, and hip function.Clinical Orthopaedics and Related Research 11/2014; 473(4). DOI:10.1007/s11999-014-4048-1 · 2.88 Impact Factor
[Show abstract] [Hide abstract]
ABSTRACT: Complex proximal femoral deformities, including an elevated greater trochanter, short femoral neck, and aspherical head-neck junction, often result in pain and impaired hip function resulting from intra-/extraarticular impingement. Relative femoral neck lengthening may address these deformities, but mid-term results of this approach have not been widely reported.Clinical Orthopaedics and Related Research 11/2014; 473(4). DOI:10.1007/s11999-014-4032-9 · 2.88 Impact Factor