Accuracy and Reliability of Software Navigation for Acetabular Component Placement in THA: An In Vitro Validation Study.

Background and Objectives: Intraoperative fluoroscopy can be used to increase the accuracy of the acetabular component positioning during total hip arthroplasty. However, given the three-dimensional nature of cup positioning, it can be difficult to accurately assess inclination and anteversion angles based on two-dimensional imaging. The purpose of this study is to validate a novel method for calculating the 3D orientation of the acetabular cup from 2D fluoroscopic imaging. Materials and Methods: An acetabular cup was implanted into a radio-opaque pelvis model in nine positions sequentially, and the inclination and anteversion angles were collected in each position using two methods: (1) a coordinate measurement machine (CMM) was used to establish a digitalized anatomical coordinate frame based on pelvic landmarks of the cadaveric specimen, and the 3D position of the cup was then expressed with respect to the anatomical planes; (2) AP radiographic images were collected, and a mathematical formula was utilized to calculate the 3D inclination and anteversion based on the 2D images. The results of each method were compared, and interrater and intrarater reliably of the 2D method were calculated. Results: Interrater reliability was excellent, with an interclass correlation coefficient (ICC) of 0.988 (95% CI 0.975-0.994) for anteversion and 0.997 (95% CI 0.991-0.999) for inclination, as was intrarater reliability, with an ICC of 0.995 (95% CI 0.985-0.998) for anteversion and 0.998 (95% CI 0.994-0.999) for inclination. Intermethod accuracy was excellent with an ICC of 0.986 (95% CI: 0.972-0.993) for anteversion and 0.993 (95% CI: 0.989-0.995) for inclination. The Bland-Altman limit of agreement, which represents the error between the 2D and 3D methods, was found to range between 2 to 5 degrees. Conclusions: This data validates the proposed methodology to calculate 3D anteversion and inclination angles based on 2D fluoroscopic images to within five degrees. This method can be utilized to improve acetabular component placing intraoperatively and to check component placement postoperatively.

POSTERIOR VERSUS ANTERIOR APPROACH TO TOTAL HIP ARTHROPLASTY: A SYSTEMATIC REVIEW AND META-ANALYSIS OF RANDOMIZED CONTROLLED TRIALS.

OBJECTIVE: To perform a systematic review and meta-analysis to compare clinical and surgical outcomes of posterior versus anterior approach to primary total hip arthroplasty (THA). METHODS: This study followed the standard methodology established by the Cochrane Handbook and the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Two independent reviewers searched for randomized controlled trials comparing posterior an anterior approach to primary THA with at least one quantifiable functional outcome published in the PubMed, Cochrane, and Virtual Health Library databases. RESULTS: The analysis included ten randomized controlled trials conducted with 774 patients. The posterior approach was associated with shorter operative time (mean of 15.98 minutes shorter, 95% CI 11.21 to 20.76, p < 0.00001) while the anterior approach was associated with shorter length of hospital stay (0.31 days or about eight hours shorter, 95% CI 0.12 to 0.51, p = 0.002) and greater earlier improvement in functional outcomes up to six months from the procedure (mean Harris Hip Score of 4.06 points greater, 95% CI 2.23 to 5.88, p < 0.0001). CONCLUSION: Whereas the posterior approach to primary THA is associated with a shorter operative time, the anterior approach has the potential to decrease the length of stay and provide greater short-term functional restoration. Level of evidence I, Systematic Review and Meta-Analysis.

OBJETIVO: Realizar uma revisão sistemática e metanálise para comparar os resultados clínicos e cirúrgicos entre a via posterior e via anterior para ATQ. MÉTODOS: Este estudo seguiu as diretrizes Cochrane e PRISMA (Principais Itens para Relatar Revisões Sistemáticas e Meta-Análises). Dois investigadores independentes procuraram estudos randomizados controlados nas plataformas de busca PubMed, Cochrane e Biblioteca Virtual em Saúde. Estudos comparando a via posterior com a via anterior para ATQ primária com pelo menos um escore funcional de resultado clínico foram incluídos. RESULTADOS: Dez estudos com 774 pacientes foram incluídos. A via posterior foi associada a um tempo operatório menor (média de 15.98 minutos menor, IC 95% 11.21 a 20.76, p < 0.00001), enquanto a via anterior foi associada a um tempo de internação hospitalar menor (0.31 dia ou cerca de oito horas a menos, IC 95% 0.12 a 0.51, p = 0.002) e melhora superior dos resultados funcionais em até seis meses após a cirurgia (Harris Hip Score médio de 4.06 pontos maior, IC 95% 2.23 a 5.88, p < 0.0001). CONCLUSÃO: A via posterior foi associada a um tempo operatório menor, enquanto a via anterior tem o potencial de diminuir o tempo de hospitalização e fornecer melhor recuperação funcional no curto prazo. Nível de Evidência I, Revisão Sistemática e Metanálise.

Posterior versus anterior approach to total hip arthroplasty: a systematic review and meta-analysis of randomized controlled trials / Via posterior versus via anterior para artroplastia total do quadril: revisão sistemática e metanálise de estudos clínicos randomizados

ABSTRACT Objective: To perform a systematic review and meta-analysis to compare clinical and surgical outcomes of posterior versus anterior approach to primary total hip arthroplasty (THA). Methods: This study followed the standard methodology established by the Cochrane Handbook and the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Two independent reviewers searched for randomized controlled trials comparing posterior an anterior approach to primary THA with at least one quantifiable functional outcome published in the PubMed, Cochrane, and Virtual Health Library databases. Results: The analysis included ten randomized controlled trials conducted with 774 patients. The posterior approach was associated with shorter operative time (mean of 15.98 minutes shorter, 95% CI 11.21 to 20.76, p < 0.00001) while the anterior approach was associated with shorter length of hospital stay (0.31 days or about eight hours shorter, 95% CI 0.12 to 0.51, p = 0.002) and greater earlier improvement in functional outcomes up to six months from the procedure (mean Harris Hip Score of 4.06 points greater, 95% CI 2.23 to 5.88, p < 0.0001). Conclusion: Whereas the posterior approach to primary THA is associated with a shorter operative time, the anterior approach has the potential to decrease the length of stay and provide greater short-term functional restoration. Level of evidence I, Systematic Review and Meta-Analysis.

RESUMO Objetivo: Realizar uma revisão sistemática e metanálise para comparar os resultados clínicos e cirúrgicos entre a via posterior e via anterior para ATQ. Métodos: Este estudo seguiu as diretrizes Cochrane e PRISMA (Principais Itens para Relatar Revisões Sistemáticas e Meta-Análises). Dois investigadores independentes procuraram estudos randomizados controlados nas plataformas de busca PubMed, Cochrane e Biblioteca Virtual em Saúde. Estudos comparando a via posterior com a via anterior para ATQ primária com pelo menos um escore funcional de resultado clínico foram incluídos. Resultados: Dez estudos com 774 pacientes foram incluídos. A via posterior foi associada a um tempo operatório menor (média de 15.98 minutos menor, IC 95% 11.21 a 20.76, p < 0.00001), enquanto a via anterior foi associada a um tempo de internação hospitalar menor (0.31 dia ou cerca de oito horas a menos, IC 95% 0.12 a 0.51, p = 0.002) e melhora superior dos resultados funcionais em até seis meses após a cirurgia (Harris Hip Score médio de 4.06 pontos maior, IC 95% 2.23 a 5.88, p < 0.0001). Conclusão: A via posterior foi associada a um tempo operatório menor, enquanto a via anterior tem o potencial de diminuir o tempo de hospitalização e fornecer melhor recuperação funcional no curto prazo. Nível de Evidência I, Revisão Sistemática e Metanálise.

Epidemiology of hip pain in brazilian bodybuilders / Epidemiologia da dor no quadril em fisiculturistas brasileiros

ABSTRACT Objective: To determine the frequency of hip pain in competitive bodybuilders over three different bodybuilding competitions. Methods: This study evaluated bodybuilders recruited from three competitions during the year of 2016. All participants provided their informed consent and the study received IRB approval. Training routine, health condition, level of success on competitions, history of hip pain and physical examination of the hip were evaluated. Results: 113 bodybuilders were evaluated, mean age was 30.5 ± 8.65 years and mean BMI was 25.2 ± 3.65 kg/m2. Mean values for hip flexion, adduction, abduction, internal rotation, external rotation and distance between the knee and the table (FABER distance) were 116 ± 13, 23 ± 8, 71 ± 12, 40 ± 10, 36 ± 9 and 19 ± 4, respectively. Eight (7%) participants presented hip pain within the week prior to examination and only 2 (1,7%) presented with anterior impingement sign. None of the athletes who reported hip pain interrupted their physical training or performance. Conclusion: Symptomatic athletes continued their training program under the presence of hip pain. The frequency of hip pain among bodybuilders is high and may be underestimated in this study. Level of Evidence IV, Case series.

RESUMO Objetivo: Determinar a frequência de dor no quadril em atletas fisiculturistas durante três competições de fisiculturismo. Métodos: Este estudo avaliou fisiculturistas recrutados em três competições de fisiculturismo durante o ano de 2016. Termo de consentimento foi obtido de todos os participantes, e também foi obtido a aprovação do CEP. Rotina de treinos, condição de saúde, nível de sucesso nas competições, antecedente de dor no quadril ao exame físico foram avaliados. Resultados: Um total de 113 fisiculturistas foram avaliados, com idade e IMC médio de 30.5 ± 8.65 anos e 25.2 ± 3.65 kg/m2, respectivamente. O valor médio de flexão, adução, abdução, rotação interna, rotação externa do quadril, e distância entre o joelho e a mesa de exame (distância FABERE) foi de 116 ± 13, 23 ± 8, 71 ± 12, 40 ± 10, 36 ± 9 e 19 ± 4, respectivamente. Oito (7%) participantes apresentavam dor no quadril dentro da última semana antes de serem examinados, e apenas dois (1.7%) apresentavam sinal do impacto anterior do quadril à manobra de flexão adução e rotação interna. A dor no quadril não afetou o treinamento físico e a performance dos atletas que reportaram dor no quadril. Conclusão: Atletas sintomáticos continuaram o programa de treinamento mesmo na presença de dor no quadril. A frequência de dor no quadril de atletas fisiculturistas é alta e pode ter sido subestimada neste estudo. Nível de Evidência IV, Série de casos.

EPIDEMIOLOGY OF HIP PAIN IN BRAZILIAN BODYBUILDERS.

OBJECTIVE: To determine the frequency of hip pain in competitive bodybuilders over three different bodybuilding competitions. METHODS: This study evaluated bodybuilders recruited from three competitions during the year of 2016. All participants provided their informed consent and the study received IRB approval. Training routine, health condition, level of success on competitions, history of hip pain and physical examination of the hip were evaluated. RESULTS: 113 bodybuilders were evaluated, mean age was 30.5 ± 8.65 years and mean BMI was 25.2 ± 3.65 kg/m2. Mean values for hip flexion, adduction, abduction, internal rotation, external rotation and distance between the knee and the table (FABER distance) were 116 ± 13, 23 ± 8, 71 ± 12, 40 ± 10, 36 ± 9 and 19 ± 4, respectively. Eight (7%) participants presented hip pain within the week prior to examination and only 2 (1,7%) presented with anterior impingement sign. None of the athletes who reported hip pain interrupted their physical training or performance. CONCLUSION: Symptomatic athletes continued their training program under the presence of hip pain. The frequency of hip pain among bodybuilders is high and may be underestimated in this study. Level of Evidence IV, Case series.

OBJETIVO: Determinar a frequência de dor no quadril em atletas fisiculturistas durante três competições de fisiculturismo. MÉTODOS: Este estudo avaliou fisiculturistas recrutados em três competições de fisiculturismo durante o ano de 2016. Termo de consentimento foi obtido de todos os participantes, e também foi obtido a aprovação do CEP. Rotina de treinos, condição de saúde, nível de sucesso nas competições, antecedente de dor no quadril ao exame físico foram avaliados. RESULTADOS: Um total de 113 fisiculturistas foram avaliados, com idade e IMC médio de 30.5 ± 8.65 anos e 25.2 ± 3.65 kg/m2, respectivamente. O valor médio de flexão, adução, abdução, rotação interna, rotação externa do quadril, e distância entre o joelho e a mesa de exame (distância FABERE) foi de 116 ± 13, 23 ± 8, 71 ± 12, 40 ± 10, 36 ± 9 e 19 ± 4, respectivamente. Oito (7%) participantes apresentavam dor no quadril dentro da última semana antes de serem examinados, e apenas dois (1.7%) apresentavam sinal do impacto anterior do quadril à manobra de flexão adução e rotação interna. A dor no quadril não afetou o treinamento físico e a performance dos atletas que reportaram dor no quadril. CONCLUSÃO: Atletas sintomáticos continuaram o programa de treinamento mesmo na presença de dor no quadril. A frequência de dor no quadril de atletas fisiculturistas é alta e pode ter sido subestimada neste estudo. Nível de Evidência IV, Série de casos.

An Anatomic Study of the Damage to Capsular Hip Stabilizers During Subspine Decompression Using a Transverse Interportal Capsulotomy in Hip Arthroscopy.

PURPOSE: To quantify the damage to the soft tissue stabilizers of the hip after a transverse interportal capsulotomy and subspine trimming in hip arthroscopy. METHODS: Eight human cadaveric hemipelvises underwent hip arthroscopy through a transverse interportal capsulotomy. Arthroscopic subspine trimming performed on all specimens was classified according to an anatomic index. The width of the proximal capsule was measured before and after subspine trimming. The extent of damage to the iliofemoral ligament (IFL) after dissection was recorded. Potential damage to pericapsular structures was assessed by measuring the distance between the capsulotomy and rectus femoris and iliocapsularis muscle with an electronic caliper. RESULTS: In all specimens, ≥50% of the width of the IFL was damaged. The subspine trimming was successfully performed in 7 of 8 specimens (87.5%) according to the proposed index. The sizes of the trimmed bone area measured in the anteroposterior and proximal-distal axis were 21.2 ± 7.5 and 13.1 ± 9 mm, respectively (mean ± standard deviation). The width of the proximal capsule at the anterior and posterior corner of the capsulotomy was 19.8 ± 5.2 and 11.8 ± 1.7 mm, respectively. After subspine trimming, the mean width of the anterior and posterior proximal capsular attachments was 6.4 ± 1.4 and 7.0 ± 1.6 mm, respectively. On average, 13.4 mm of anterior capsule was damaged after anterior inferior iliac spine trimming, versus 4.7 mm of the posterior capsule. The distances from the capsulotomy to the rectus femoris direct and reflected head were 6.8 ± 4.9 and 6.3 ± 7.7 mm, respectively, and to the iliocapsularis muscle, 11.5 ± 7.8 mm. CONCLUSION: High rates of damage to the IFL were observed with the interportal capsulotomy. Increased tissue damage at the anterior capsule was observed after subspine trimming. The width of the proximal capsular attachment was ≥5 mm in all specimens. CLINICAL RELEVANCE: Surgeons should be aware of the potential damage to the native capsule and pericapsular structures when using a transverse interportal capsulotomy for the arthroscopic subspine decompression. LEVEL OF EVIDENCE: IV: cadaveric study, case series.

Midterm Outcomes Following Repair of Capsulotomy Versus Nonrepair in Patients Undergoing Hip Arthroscopy for Femoroacetabular Impingement With Labral Repair.

PURPOSE: The purpose of this study was to compare the midterm outcomes and conversion to total hip arthroplasty (THA) rate in patients who had repair of the capsulotomy versus nonrepair following arthroscopic hip labral repair and correction of femoroacetabular impingement (FAI). METHODS: All patients undergoing primary arthroscopic hip labral repair and correction of FAI between 2005 and 2012 were eligible for this study. Exclusion criteria were age < 18 years, lateral center-edge angle < 25°, previous hip procedures, femoral avascular necrosis, radiographic joint space ≤ 2 mm, or microfracture at arthroscopy. Patients who did not have the capsulotomy repaired were matched 1:2 with patients who had the capsulotomy repaired. Patients were matched by age, gender, and intraoperative procedures. The primary outcome score was the Hip Outcome Score Daily Living (HOS-ADL). RESULTS: Forty-two patients (18 female patients, 24 male patients) without repair of the capsulotomy were matched with 84 patients with repaired capsulotomy. The average age for both groups was 38 ± 15 years. Patients in the nonrepair group were 6.8 (95% confidence interval, 1.2-52) times more likely to undergo THA compared with the repair group. There was no difference in revision rate between the 2 groups. The mean follow-up time was 7.3 ± 2.7 years and 6.4 ± 2.3 years for the nonrepair and repair group, respectively (P = .107). Patients in the repair group had significantly higher HOS-ADL (P = .01) and modified Harris hip score (mHHS; P = .007). The percentage of patients who reached minimum clinically important difference was significantly higher in the repair group for HOS-ADL (P = .002) and HOS-Sport (P = .036) compared with the nonrepair group. However, there was no difference in the percentage of patients who reached minimal important change for the mHHS (P = .060). Following hip arthroscopy, the average alpha angle was 41.6° ± 6° in the nonrepair group and 40.8° ± 3° in the repair group. CONCLUSIONS: Patients who undergo arthroscopic FAI correction and hip labral repair with repair of the capsulotomy had higher HOS-ADL and mHHS scores at midterm follow-up compared with patients with nonrepair, and the percentage of patients who reached the minimum clinically important difference was significantly higher in the repair group for HOS-ADL and HOS-Sport compared with the nonrepair group. In addition, a lower rate of conversion to THA was seen in the repair group. LEVEL OF EVIDENCE: Level III, retrospective comparative study.

Early Outcomes After Arthroscopic Hip Capsular Reconstruction Using Iliotibial Band Allograft Versus Dermal Allograft.

PURPOSE: To compare the clinical outcomes between 2 groups of patients who underwent arthroscopic hip capsular reconstruction with the same surgical technique with an iliotibial band (ITB) allograft versus dermal allograft tissue. METHODS: From March 2013 to October 2015, patients who were 18 years of age or older and who underwent revision arthroscopic hip surgery with capsular reconstruction by the senior author were identified. Patients who were younger than 18 years old, had a lateral center-edge angle <20° or Tonnis osteoarthritis grade 2 or 3, or refused to participate were excluded. Patients were assigned to 2 groups based on whether an ITB (ITB group) or a dermal allograft (dermal group) was used to reconstruct the capsule. The ITB graft was used initially, then the dermal graft was used when it was available. The dimensions were based on the intraoperative measurement of the capsular defect, and the thickness was 3 mm. Other treatments included labral debridement, repair, or reconstruction; treatment of residual femoroacetabular impingement; and treatment of cartilage damage. Clinical outcome scores including the Hip Outcome Score (HOS)-Activity of Daily Living scale (primary outcome measure), modified Harris Hip Score, HOS-Sports scale, SF-12, and Western Ontario & McMaster Universities Osteoarthritis Index were compared between the groups in addition to the failure rate (conversion to total hip arthroplasty, revision hip arthroscopy) and patient satisfaction rate with the outcome (range, 1-10). RESULTS: Thirty-six patients (9 men and 27 women) met the inclusion criteria. Each group consisted of 18 patients (18 hips) with a mean age of 30.9 ± 9.4 years in the ITB group and a mean age of 29.8 ± 9.4 years in the dermal group (P = .718). There were no differences in patient demographics, physical examination findings, or imaging characteristics. The procedure failed for 8 patients (4 in the ITB group and 4 in the dermal group), and another surgery was required (P = 1.0). Additional surgeries included 3 total hip arthroplasties, 1 periarticular osteotomy, and 4 revision arthroscopies. The mean follow-up time was 25 months (range, 18-38 months) in both groups (P = .881). At follow-up, the HOS-Activity of Daily Living scale, SF-12, modified Harris Hip Score, and HOS-Sports scale measures were significantly higher in the ITB group than in the dermal group (P < .05). A greater percentage of patients reached minimum clinically important difference in the ITB group for Western Ontario & McMaster Universities Osteoarthritis Index and HOS scales with the minimum clinically important difference for HOS-Sports scale being significantly higher in the ITB group (P = .04). Patient satisfaction scores were 8 and 6 in the ITB and dermal groups, respectively. CONCLUSIONS: At a mean follow-up time of 25 months, hip capsular reconstruction with an ITB allograft results in improved clinical outcomes compared with the dermal allograft. A similar failure rate was noted in both groups, but a greater percentage of patients in the ITB group achieved clinical improvement.

Positive FABER distance test is associated with higher alpha angle in symptomatic patients.

PURPOSE: The purpose of this study was to determine the diagnostic value of the flexion abduction external rotation (FABER) distance test (FDT) for the diagnosis of cam-type femoroacetabular impingement (FAI) as defined by alpha angle. METHODS: For this study, 603 patients with symptomatic, unilateral femoroacetabular impingement were included. Patients with symptoms of hip instability, bilateral symptoms, bilateral surgery, or bilateral alpha angles over 55 were excluded from the analysis. A positive FDT was defined as a difference of 4 cm or more between hips. A pathological cam was defined as an alpha angle of 78° or greater. RESULTS: The average age was 36.4 ± 12 years, with 344 males and 259 females. Faber distance of the injured hip was correlated with age at surgery (rho = 0.148; p < 0.001). Alpha angle on the injured hip was positively correlated with injured hip FABER distance (rho = 0.276; p < 0.001). The average alpha angle in patients with a positive FABER distance test was 74° (SD = 11°) compared to 68° (SD = 8°) in patients with a negative distance test (p = 0.001). The sensitivity of the FDT to diagnose pathological cam was 0.848 (0.79-0.89) with a negative predictive value of 86% (81-90%). CONCLUSION: This study demonstrated that the FABER distance test is correlated with the alpha angle and is a good diagnostic exam for pathological cam-type FAI as defined by and alpha angle equal to or greater than 78°. CLINICAL RELEVANCE: FABER distance test is a simple test that can be used as a screening test to decide if FAI should be suspected and further testing is needed. LEVEL OF EVIDENCE: III.

A systematic review-meta-analysis of venous thromboembolic events following primary hip arthroscopy for FAI: clinical and epidemiologic considerations.

The purpose of this study was to report the proportion of venous thromboembolic events (VTE) in patients undergoing primary hip arthroscopy for femoroacetabular impingement (FAI) and present a critical overview of the literature to aid in better result interpretation. MedLine, Scopus and Web of Science databases were searched from January 2000 to March 2017. Four thousand-five-hundred and seventy-seven hip cases were included in the meta-analysis of 38 studies. The mean age of patients was 36 ± 1.8 years and the mean follow-up time was 20.6 months. The meta-analysed rate of deep vein thrombosis (DVT) in patients undergoing primary hip arthroscopy for FAI syndrome was 1.18%; 95%CI [0.8-1.74%]; The meta-analysed rate of pulmonary embolism (PE) in patients undergoing primary hip arthroscopy for FAI syndrome was 0.59%; 95%CI [0.38-0.92%]. Quality assessment was performed using the Methodological Index for Non-Randomized Studies (MINORS) criteria the Quality in Prognostic Studies (QUIPS) tool. Sensitivity analysis was conducted to assess for publication bias and its influence on the results. The corrected for publication bias proportion of DVT was 2.02%; 95%CI [1.36-2.99%]. The DVT rate was double following the correction of bias while additional types of bias were detected. Attention must be paid when considering the outcomes of observational studies to make clinical decisions. Insufficient evidence exists to support whether anti-VTE chemoprophylaxis should be administered to patients undergoing primary hip arthroscopy for FAI. Due to the life-threatening character of this complication, the results should serve as starting point to design clinical trials and establish guidelines. Until then, the application of preventive measures against VTE should be decided on a case-by-case basis.

Effects of Capsular Reconstruction With an Iliotibial Band Allograft on Distractive Stability of the Hip Joint: A Biomechanical Study.

BACKGROUND: The capsular ligaments and the labral suction seal cooperatively manage distractive stability of the hip. Capsular reconstruction using an iliotibial band (ITB) allograft aims to address capsular insufficiency and iatrogenic instability. However, the extent to which this procedure may restore hip distractive stability after a capsular defect is unknown. PURPOSE: To evaluate the biomechanical effects of capsular reconstruction on distractive stability of the hip joint. STUDY DESIGN: Controlled laboratory study. METHODS: Eight fresh-frozen cadaveric hip specimens were dissected to the level of the capsule and axially distracted in 3 testing states: intact capsule, partial capsular defect, and capsular reconstruction with an ITB allograft. Each femur was compressed with 500 N of force and then distracted 6 mm relative to the neutral position at 0.5 mm/s. Distractive force was continuously recorded, and the first peak delineating 2 phases of hip distractive stability in the force-displacement curve was analyzed. RESULTS: The median force at maximum distraction in the capsular reconstruction state (156 N) was significantly greater than that in the capsular defect state (89 N; P = .036) but not significantly different from that in the intact state (218 N; P = .054). Median values for distractive force at first peak (60 N, 72 N, and 61 N, respectively; P = .607), distraction at first peak (2.3 mm, 2.3 mm, and 2.5 mm, respectively; P = .846), and percentage decrease in distractive force (35%, 78%, and 63%, respectively; P = .072) after the first peak were not significantly different between the intact, defect, and reconstruction states. CONCLUSION: Capsular reconstruction with an ITB allograft significantly increased the force required to distract the hip compared with a capsular defect in a cadaveric model. To our knowledge, this is the first study to report an initial peak distractive force and to propose 2 distinct phases of hip distractive stability. CLINICAL RELEVANCE: The consequences of a capsular defect on distractive stability of the hip may be underappreciated among the orthopaedic community; with that said, capsular reconstruction using an ITB allograft provided significantly increased distractive stability and should be considered an effective treatment option for patients with symptomatic capsular deficiency.

TWO CLASSIFICATIONS FOR SURGICAL WOUND HEMATOMA AFTER TOTAL HIP REPLACEMENT.

OBJECTIVE: To determine the reliability of two classification methods for wound hematoma after total hip replacement. METHODS: This prospective cohort study was conducted on patients who underwent total hip replacement for hip osteoarthritis between May 2014 and April 2015. Epidemiological, surgical, and functional data were assessed. Two experienced hip surgeons evaluated 75 pictures of wounds taken 24 hours after surgery. Both evaluators performed the analysis twice, with a 6-week interval between the two analyses. The subjective classification was divided into four different categories describing the hematoma: absent, mild, moderate, and severe. The objective classification was derived from mathematical calculation of the area of the hematoma using a grid superimposed on a picture of the wound. RESULTS: The subjective classification demonstrated an intra-rater agreement of more than 70%, while kappa values showed poor to moderate inter-rater reliability. The objective classification based on mathematical measurements of the hematoma area was more reliable, with good to excellent intra- and inter-rater reliability. CONCLUSION: The objective classification demonstrated higher intra- and inter-rater reliability. The classification methods used in this study could serve as a useful instrument for orthopedic surgeons, researchers, and health care providers when assessing wound hematomas after total hip replacement. Level of Evidence II; Development of diagnostic criteria on consecutive patients (with universally applied reference ''gold'' standard).

OBJETIVO: Determinar a confiabilidade de dois métodos de classificação dos hematomas de ferida cirúrgica após artroplastia total do quadril. MÉTODOS: Este estudo prospectivo de coorte foi conduzido em pacientes com osteoartrose do quadril submetidos à artroplastia total do quadril entre maio de 2014 e abril de 2015. Foram analisados dados epidemiológicos, cirúrgicos e funcionais. Dois experientes cirurgiões de quadril avaliaram 75 fotografias de feridas obtidas 24 horas após a cirurgia. Ambos os avaliadores analisaram as fotografias duas vezes, em intervalo de seis semanas. A classificação subjetiva consistiu em quatro categorias descrevendo o hematoma: ausente, leve, moderado e grave. A classificação objetiva foi obtida pelo cálculo matemático da área do hematoma, sobrepondo-se uma retícula a cada fotografia de ferida. RESULTADOS: A classificação subjetiva mostrou concordância intra-avaliador de mais de 70%, enquanto que os valores de kappa mostraram concordância inter-avaliador baixa a moderada. A classificação objetiva baseada em cálculo matemático da área do hematoma foi mais confiável, com excelente concordância intra e inter- avaliador. CONCLUSÃO: A classificação objetiva demonstrou melhor concordância intra e inter-avaliador. Os métodos de classificação usados neste estudo podem ser um instrumento útil para cirurgiões ortopedistas, pesquisadores e profissionais de saúde para avaliar hematomas de feridas cirúrgicas após artroplastia total de quadril. Nível de Evidência II; Desenvolvimento de critérios diagnósticos em pacientes consecutivos (com padrão de referência "ouro" aplicado).

Risk Factors and Treatment Options for Failure of a Two-Stage Exchange.

PURPOSE OF REVIEW: Although a two-stage exchange revision is reported to have a high success rate, this strategy may fail as a treatment for prosthetic joint infection (PJI). When it does, resection arthroplasty, arthrodesis, amputation, and chronic antibiotic suppression may play a role. The purpose of this review is to determine which are the main risk factors for a two-stage exchange failure and to analyze the indications and results of resection arthroplasty, arthrodesis, amputation, and antibiotic chronic suppression for PJI. RECENT FINDINGS: Recent literature demonstrates that the main risk factors for a two-stage exchange failure are as follows: hemodialysis, obesity, multiple previous procedures, diabetes mellitus, corticosteroid therapy, hypoalbuminemia, immunosuppression, rheumatological conditions, coagulation disorders, and infection due to multidrug-resistant (MDR) bacteria or fungal species. Regarding microorganisms, besides Staphylococcus aureus, Streptococcus spp., Enterobacteriaceae species such as Klebsiella pneumoniae and Enterobacter sp., Pseudomonas aeruginosa, or Acinetobacter baumannii, and fungus including Candida sp. are also considered risk factors for a two-stage exchange failure. Resection arthroplasty, arthrodesis, and amputation have a limited role. Chronic suppression is an option for high-risk patients or unfeasible reconstruction. In summary, we report the main risk factors for a two-stage exchange failure and alternative procedures when it occurs. Future research on patient-specific risk factors for a two-stage exchange may aid surgical decision-making and optimization of outcomes.

Use of closed suction drainage after primary total hip arthroplasty: a prospective randomized controlled trial.

OBJECTIVE: This study aimed to investigate drain use in a controlled population of patients with hip osteoarthritis undergoing primary total hip arthroplasty. METHODS: This prospective controlled trial evaluated 93 patients randomized into two groups: a group that received drains and a group that did not. The patients who were randomized to the drain group used a 3.2 mm drain placed under the fascia that was kept in place for 24 h. Postoperative evaluations were performed after 24 h and then three, six, and 12 weeks after total hip arthroplasty. The primary outcome was perioperative blood loss in both groups 24 h after total hip arthroplasty. The other parameters that were evaluated included mid-thigh circumference, the rate of blood transfusion, hematocrit, inflammatory serum levels, and the Harris Hip Score. RESULTS: The clinical and laboratory data revealed no differences between the study groups with respect to blood loss and need for blood transfusion, duration of hospital stay, reoperation rate, complications, inflammatory serum markers, and the Harris Hip Score. Patients without closed suction drainage reported higher pain levels after 24 h (VAS score 1 vs. 2, p < 0.01). CONCLUSION: Similar clinical and laboratory outcomes were found in both cohorts.

OBJETIVO: Investigar o uso de drenos em uma população controlada de pacientes com osteoartrose do quadril submetidos a artroplastia total de quadril primária. MÉTODOS: Este estudo prospectivo controlado avaliou 93 pacientes randomizados em dois grupos: um grupo no qual se usou drenos e um grupo no qual não se usou drenos. Os pacientes que foram randomizados para o grupo com drenos utilizaram dreno de 3,2 mm, colocado sob a fáscia, e mantido no local por 24 horas. As avaliações pós-operatórias foram realizadas após 24 horas e três, seis e 12 semanas após a artroplastia total de quadril. O desfecho primário foi perda sanguínea perioperatória em ambos os grupos 24 horas após a artroplastia total de quadril. Os demais parâmetros avaliados foram circunferência do meio da coxa, taxa de transfusão de sangue, hematócrito, níveis séricos inflamatórios e Harris Hip Score. RESULTADOS: Os dados clínicos e laboratoriais não indicaram diferenças entre os grupos de estudo quanto à perda de sangue e necessidade de transfusão de sangue, tempo de internação hospitalar, taxa de reoperação, complicações, marcadores séricos inflamatórios e Harris Hip Score. Os pacientes que não usaram drenos de sucção fechada relataram maiores níveis de dor após 24 horas (EVA 1 vs. 2, p < 0,01). CONCLUSÃO: Encontramos resultados clínicos e laboratoriais semelhantes em ambas as coortes.

Use of closed suction drainage after primary total hip arthroplasty: a prospective randomized controlled trial / Uso de drenos de sucção fechada após artroplastia total de quadril primária: um estudo prospectivo, randomizado e controlado

ABSTRACT Objective: This study aimed to investigate drain use in a controlled population of patients with hip osteoarthritis undergoing primary total hip arthroplasty. Methods: This prospective controlled trial evaluated 93 patients randomized into two groups: a group that received drains and a group that did not. The patients who were randomized to the drain group used a 3.2 mm drain placed under the fascia that was kept in place for 24 h. Postoperative evaluations were performed after 24 h and then three, six, and 12 weeks after total hip arthroplasty. The primary outcome was perioperative blood loss in both groups 24 h after total hip arthroplasty. The other parameters that were evaluated included mid-thigh circumference, the rate of blood transfusion, hematocrit, inflammatory serum levels, and the Harris Hip Score. Results: The clinical and laboratory data revealed no differences between the study groups with respect to blood loss and need for blood transfusion, duration of hospital stay, reoperation rate, complications, inflammatory serum markers, and the Harris Hip Score. Patients without closed suction drainage reported higher pain levels after 24 h (VAS score 1 vs. 2, p < 0.01). Conclusion: Similar clinical and laboratory outcomes were found in both cohorts.

RESUMO Objetivo: Investigar o uso de drenos em uma população controlada de pacientes com osteoartrose do quadril submetidos a artroplastia total de quadril primária. Métodos: Este estudo prospectivo controlado avaliou 93 pacientes randomizados em dois grupos: um grupo no qual se usaram drenos e um grupo no qual não se usaram drenos. Os pacientes randomizados para o grupo com drenos usaram dreno de 3,2 mm, colocado sob a fáscia e mantido por 24 horas. As avaliações pós-operatórias foram feitas após 24 horas e três, seis e 12 semanas após a artroplastia total de quadril. O desfecho primário foi perda sanguínea perioperatória em ambos os grupos 24 horas após a artroplastia total de quadril. Os demais parâmetros avaliados foram circunferência do meio da coxa, taxa de transfusão de sangue, hematócrito, níveis séricos inflamatórios e Harris Hip Score. Resultados: Os dados clínicos e laboratoriais não indicaram diferenças entre os grupos de estudo quanto à perda de sangue e necessidade de transfusão de sangue, tempo de internação hospitalar, taxa de reoperação, complicações, marcadores séricos inflamatórios e Harris Hip Score. Os pacientes que não usaram drenos de sucção fechada relataram maiores níveis de dor após 24 horas (EVA 1 vs. 2, p < 0,01). Conclusão: Encontramos resultados clínicos e laboratoriais semelhantes em ambas as coortes.

Labral Augmentation with Native Tissue Preservation with a 7.5-Year Follow-up: A Case Report.

CASE: Arthroscopic labral repair has resulted in excellent functional outcomes. However, extensive labral damage or diminutive size of the labrum may preclude a repair. In these cases, labral augmentation serves as an operative treatment option. We report the case of a labral augmentation with 7.5 years of follow-up, including intraoperative reexamination, which highlights the ability of an iliotibial band autograft to incorporate with the native labrum. CONCLUSION: When indicated in an appropriate patient, labral augmentation with an iliotibial band autograft is an established technique that can result in an excellent outcome.

Two classifications for surgical wound hematoma after total hip replacement / Duas classificações para hematoma de ferida operatória após artroplastia total do quadril

ABSTRACT Objective: To determine the reliability of two classification methods for wound hematoma after total hip replacement. Methods: This prospective cohort study was conducted on patients who underwent total hip replacement for hip osteoarthritis between May 2014 and April 2015. Epidemiological, surgical, and functional data were assessed. Two experienced hip surgeons evaluated 75 pictures of wounds taken 24 hours after surgery. Both evaluators performed the analysis twice, with a 6-week interval between the two analyses. The subjective classification was divided into four different categories describing the hematoma: absent, mild, moderate, and severe. The objective classification was derived from mathematical calculation of the area of the hematoma using a grid superimposed on a picture of the wound. Results: The subjective classification demonstrated an intra-rater agreement of more than 70%, while kappa values showed poor to moderate inter-rater reliability. The objective classification based on mathematical measurements of the hematoma area was more reliable, with good to excellent intra- and inter-rater reliability. Conclusion: The objective classification demonstrated higher intra- and inter-rater reliability. The classification methods used in this study could serve as a useful instrument for orthopedic surgeons, researchers, and health care providers when assessing wound hematomas after total hip replacement. Level of Evidence II; Development of diagnostic criteria on consecutive patients (with universally applied reference ''gold'' standard).

RESUMO Objetivo: Determinar a confiabilidade de dois métodos de classificação dos hematomas de ferida cirúrgica após artroplastia total do quadril. Métodos: Este estudo prospectivo de coorte foi conduzido em pacientes com osteoartrose do quadril submetidos à artroplastia total do quadril entre maio de 2014 e abril de 2015. Foram analisados dados epidemiológicos, cirúrgicos e funcionais. Dois experientes cirurgiões de quadril avaliaram 75 fotografias de feridas obtidas 24 horas após a cirurgia. Ambos os avaliadores analisaram as fotografias duas vezes, em intervalo de seis semanas. A classificação subjetiva consistiu em quatro categorias descrevendo o hematoma: ausente, leve, moderado e grave. A classificação objetiva foi obtida pelo cálculo matemático da área do hematoma, sobrepondo-se uma retícula a cada fotografia de ferida. Resultados: A classificação subjetiva mostrou concordância intra-avaliador de mais de 70%, enquanto que os valores de kappa mostraram concordância inter-avaliador baixa a moderada. A classificação objetiva baseada em cálculo matemático da área do hematoma foi mais confiável, com excelente concordância intra e inter- avaliador. Conclusão: A classificação objetiva demonstrou melhor concordância intra e inter-avaliador. Os métodos de classificação usados neste estudo podem ser um instrumento útil para cirurgiões ortopedistas, pesquisadores e profissionais de saúde para avaliar hematomas de feridas cirúrgicas após artroplastia total de quadril. Nível de Evidência II; Desenvolvimento de critérios diagnósticos em pacientes consecutivos (com padrão de referência "ouro" aplicado).

Right Versus Left Hip Arthroscopy for Surgeons on the Learning Curve.

Hip arthroscopy is a technically demanding procedure that is currently characterized by a "steep" learning curve. Therefore, achieving an advanced technical level is often challenging, especially for the amateur hip arthroscopist. Hand laterality when training in hip arthroscopy is an aspect that has been omitted. In addition, the technical differences regarding the handling of the surgical instruments when performing hip arthroscopy on the left versus right hip can influence the technical excellence. This Technical Note summarizes our preferred hip arthroscopy technique by comparing the surgeon's hand position when operating on the left versus right hip. We also emphasize how the surgeon's hand laterality affects the instrument manipulation during the procedure and potentially the clinical outcomes.

Formation of a pseudotumor in total hip arthroplasty using a tribological metal-polyethylene pair / Formação de pseudotumor na artroplastia total do quadril com par tribológico metal-polietileno

The aim here was to report a case of a young adult patient who evolved with tumor formation in the left thigh, 14 years after revision surgery on hip arthroplasty. Davies in 2005 made the first description of this disease in patients undergoing metal-on-metal hip arthroplasty. Over the last decade, however, pseudotumors around metal-on-polyethylene surfaces have become more prevalent. Our patient presented with increased volume of the left thigh 8 years after hip arthroplasty revision surgery. Two years before the arising of the tumor in the thigh, a nodule in the inguinal region was investigated to rule out a malignant neoplastic process, but the results were inconclusive. The main preoperative complaints were pain, functional limitation and marked reduction in the range of motion of the left hip. Plain radiographs showed loosening of acetabular and femoral, and a large mass between the muscle planes was revealed through magnetic resonance imaging of the left thigh. The surgical procedure consisted of resection of the lesion and removal of the components through lateral approach. In respect of total hip arthroplasty, pseudotumors are benign neoplasms in which the bearing surface consists of metal-on-metal, but they can also occur in different tribological pairs, as presented in this case.

Relatar o caso de um paciente adulto jovem que evoluiu com tumoração na coxa esquerda após 14 anos de uma cirurgia de revisão de artroplastia do quadril. Davies em 2005 descreveu esta afecção em pacientes submetidos a atroplastia de quadril com par tribológico metal-metal, mas na última década é possível achar relatos de pseudotumores em superfície metal-polietileno. O paciente iniciou queixa de aumento de volume da coxa esquerda após oito anos da cirurgia de revisão da artroplastia do quadril. Dois anos antes do aparecimento da tumoração da coxa, a investigação para descartar um processo neoplásico maligno de um nódulo em região inguinal foi inconclusiva. Suas principais queixas pré-operatórias eram dor, limitação funcional e marcada redução da amplitude de movimento do quadril esquerdo. As radiografias do membro acometido evidenciavam soltura dos componentes acetabular e femoral, e uma grande massa entre os planos musculares se revelou à ressonância magnética da coxa esquerda. A abordagem cirúrgica consistiu de ressecção intralesional da coxa esquerda, seguida da retirada dos componentes pela via lateral direta. No âmbito da cirurgia de artroplastia de quadril, os pseudotumores são neoplasias benignas cujo par tribológico consiste em metal -metal, mas podem também ocorrer em diferentes pares tribológicos, como neste caso.