Revision Total Hip Arthroplasty Procedures Research Articles

New Comprehensive Score for Predicting Difficulties in Revision Total Hip Arthroplasty

BackgroundRevision total hip arthroplasty (THA) can be complex, and assessing possible difficulties is important to predict the operative time. No simple score for predicting difficulties has been assessed prospectively. We therefore developed an original score for the pre-operative evaluation of extraction and reconstruction difficulties. The objectives of this prospective study were to (1) assess correlations between score values and operative time, (2) determine whether the score predicted the need for revision implants and/or filling material, (3) determine whether the score predicted intra-operative and post-operative complications, and (4) evaluate the inter-observer and intra-observer reproducibility of the score. HypothesisThe score is reproducible and correlates well with the operative time, thereby allowing prediction of this parameter before surgery. Material and methodsA prospective study of 103 revision THA procedures performed between March 2018 and August 2023 was conducted. The primary outcome was operative time and the secondary outcomes were use of a revision implant, use of filling material, and intra-operative and post-operative complications. The score was determined by four observers to allow evaluation of inter-observer agreement. Intra-observer agreement was assessed by having one of the observers determine the score a second time after inclusion of the last patient. The score has a maximum value of 20 and allows classification of the procedure as very difficult, difficult, and moderately difficult. ResultsMean operative time correlated with the score value: 136.0 ± 33.9 min in the very difficult group, 102.0 ± 34.8 min in the difficult group, and 75.4 ± 65.5 min in the moderately difficult group (p = 0.0002). The score predicted the use of a reinforcement ring (40 procedures: 12/17 [70%], 11/25 [44%], and 17/61 [28%] in the very difficult, difficult, and moderately difficult groups, respectively; p = 0.01) and of a long stem (20 procedures: 8/17 [47%], 7/25 [28%], and 5/61 [8%] patients in the very difficult, difficult, and moderately difficult groups, respectively; p < 0.001). The score did not predict the use of filling material (42 procedures: 10/17 [59%], 9/25 [36%], and 23/61 [37%] in the very difficult, difficult, and moderately difficult groups, respectively; p = 0.250). The score predicted both intra-operative complications (5/17 [29%], 4/25 [16%], and 4/61 [6%] procedures in the very difficult, difficult, and moderately difficult groups, respectively; p = 0.028) and post-operative complications (4/17 [23%], 0/25 [0%], and 6/61 [9%] in the very difficult, difficult, and moderately difficult groups, respectively; p = 0.15). Inter-observer agreement was strong according to Landis-Koch criteria, with kappa values ranging from 0.70 to 0.79 [0.57–0.90]. The kappa value for intra-observer agreement was 0.74 [0.63–0.85]. DiscussionThis score predicts surgical difficulties by adding criteria to bone destruction, in contrast to widely used classifications for revision THA. Moreover, the score is reproducible and predicts the operative time, thus potentially playing an important role during pre-operative planning. Level of evidenceIV; prospective observational non-comparative study

Survivorship and Etiologies of Failure in Single-stage Revision Arthroplasty for Periprosthetic Joint Infection: A Meta-analysis

Single-stage revision arthroplasty for periprosthetic joint infection (PJI) may yield comparable infection-free survivorship with two-stage revision arthroplasty. It is unclear if the most common mode of failure of single-stage revision arthroplasty is infection or aseptic loosening. In this meta-analysis, we sought to (1) determine survivorship and (2) compare rates of different etiologies of failure of single-stage revision total hip arthroplasty (THA) and total knee arthroplasty (TKA). Preferred Reporting Items for Systematic Review and Meta-analyses guidelines search was done using search terms for "single stage revision," "exchange arthroplasty," "periprosthetic infection," "PJI," and "single stage." Patient demographics such as age, body mass index, and mean follow-up time were recorded. Overall survivorship and rates of revision surgery were aggregated using a random-effects model. Comparison of septic and aseptic loosening rates was done by risk difference and associated 95% confidence interval (CI) calculation. Twenty-four studies were identified with 2,062 and 147 single-stage revision THA and TKA procedures performed between 1984 and 2019, respectively. The weighted mean follow-up and age were 69.8 months and 66.3 years, respectively, with 55% men overall. The all-cause revision surgery rate was 11.1% and 11.8% for THA and TKA, respectively. The revision surgery rate secondary to infection and aseptic loosening and associated 95% CI for the risk difference for THA and TKA was 5.5% and 3.3% (-1.7% to 5.0%), and 3% and 8.8% (-11.4% to 2.3%), respectively. Revision surgeries due to instability and fracture combined and mortality rate were both less than 3%. Single-stage revision THA and TKA for PJI demonstrated overall high rates of survivorship, low mortality, and revision surgeries secondary to infection and aseptic loosening to be equivalent. Aseptic loosening after single-stage revision TKA might be higher than in primary TKA. As implant survivorship from infection improves in PJI, surgeons should be aware of aseptic loosening as an equally common mode of failure.

2021 AAHKS Symposium: The Painful Total Hip Arthroplasty: “Looks Good but Feels Bad”

2021 AAHKS Symposium: The Painful Total Hip Arthroplasty: “Looks Good but Feels Bad”

Contemporary Prosthetic Joint Infection Management: Is There a Role for Suppressive Antibiotic Therapy?

Deep infection after hip and knee replacement surgery remains one of the major challenges facing orthopedic surgeons in the 21st century. Infection is responsible for 14.8% of revision total hip arthroplasty procedures and 25.2% of all revision knee arthroplasty procedures [1]. Infection also remains a major cause of re-revision [2]. As the population ages, the number of comorbidities increase, and the number of total hip and knee procedures increase, the number of cases of prosthetic joint infection (PJI) are likely to increase [3].

Completeness and capture rate of publicly funded arthroplasty procedures in the New Zealand Joint Registry.

Registry-based studies have become more common due to the availability of a large study cohort. However, the validity of findings is dependent on the completeness of the registry. This study aimed to validate the capture rate of the New Zealand Joint Registry (NZJR) by matching procedures that have been recorded separately via clinical coding by the New Zealand Government's National Surgical Site Infection Improvement Programme (SSIIP). The National Health Index, a unique identification code for all patients, was combined with the arthroplasty procedure performed (primary total knee arthroplasty (TKA), primary total hip arthroplasty (THA), revision TKA or revision THA) and operation side. Publicly funded procedures recorded in the NZJR were matched with procedures recorded by the SSIIP on a record-by-record basis. This identified the total number of arthroplasty procedures performed in New Zealand, which was used as the denominator value to calculate the procedure capture rate of the NZJR. Between 2013 and 2018, 24 556 primary TKA, 28 970 primary THA, 2107 revision TKA and 4263 revision THA procedures were recorded by both datasets. The NZJR recorded 95.5% of primary TKA procedures, 96.3% of primary THA procedures, 97.1% of revision TKA procedures and 95.2% of revision THA procedures. The NZJR recorded >95% of publicly funded arthroplasty procedures. In contrast, there were inaccuracies in clinical coding by hospitals, particularly with revision procedures, demonstrating the benefits of an arthroplasty registry. However, data recorded by an infection surveillance programme may supplement arthroplasty registry data to strengthen the quality of research.

Trends in the use of dual mobility bearings in hip arthroplasty.

Dual mobility (DM) bearings are an attractive treatment option to obtain hip stability during challenging primary and revision total hip arthroplasty (THA) cases. The purpose of this study was to analyze data submitted to the American Joint Replacement Registry (AJRR) to characterize utilization trends of DM bearings in the USA. All primary and revision THA procedures reported to AJRR from 2012 to 2018 were analyzed. Patients of all ages were included and subdivided into DM and traditional bearing surface cohorts. Patient demographics, geographical region, hospital size, and teaching affiliation were assessed. Associations were determined by chi-squared analysis and logistic regression was performed to assess outcome variables. A total of 406,900 primary and 34,745 revision THAs were identified, of which 35,455 (8.7%) and 8,031 (23.1%) received DM implants respectively. For primary THA, DM usage increased from 6.7% in 2012 to 12.0% in 2018. Among revision THA, DM use increased from 19.5% in 2012 to 30.6% in 2018. Patients < 50 years of age had the highest rates of DM implantation in every year examined. For each year of increase in age, there was a 0.4% decrease in the rate of DM utilization (odds ratio (OR) 0.996 (95% confidence interval (CI) 0.995 to 0.997); p < 0.001). Females were more likely to receive a DM implant compared to males (OR 1.077 (95% CI 1.054 to 1.100); p < 0.001). Major teaching institutions and smaller hospitals were associated with higher rates of utilization. DM articulations were used more commonly for dysplasia compared with osteoarthritis (OR 2.448 (95% CI 2.032 to 2.949); p < 0.001) during primary THA and for instability (OR 3.130 (95% CI 2.751 to 3.562) vs poly-wear; p < 0.001) in the revision setting. DM articulations showed a marked increase in utilization during the period examined. Younger patient age, female sex, and hospital characteristics such as teaching status, smaller size, and geographical location were associated with increased utilization. DM articulations were used more frequently for primary THA in patients with dysplasia and for revision THA in patients being treated for instability. Cite this article: Bone Joint J 2020;102-B(7 Supple B):27-32.

Early Results From the American Joint Replacement Registry: A Comparison With Other National Registries

BackgroundThe American Joint Replacement Registry (AJRR) was created to capture knee and hip arthroplasty data in the United States. The purpose of this study was to compare early reports from the AJRR to other national registries to identify topics for future analysis. MethodsHip and knee arthroplasty data were extracted from the AJRR, Australia, New Zealand, United Kingdom, Norway, and Sweden from 2014 to 2016. Hip arthroplasty data including femoral and acetabular fixation, bearing surface, head size, dual-mobility bearings, resurfacing, and revision burden were compared. Knee arthroplasty data including polyethylene type, unicondylar arthroplasty, mobile bearings, cruciate-retaining implants, patella resurfacing, and revision burden were compared. Registry characteristics and patient demographics were reported using descriptive statistics. ResultsIn 2016, the AJRR captured 28% of arthroplasty procedures performed in the United States compared with 95%-98.3% among other registries. Cementless femoral fixation was 96.7% in the AJRR compared with 21.8%-63.4%. Ceramic and 36-mm heads were most common in AJRR; all other registries reported that metal and 32-mm heads were most popular. Dual-mobility articulations were used in 8% of primary and 28% of revision total hip arthroplasty procedures in the AJRR. The AJRR reported a unicondylar knee arthroplasty rate of 3.2% compared with 5.1%-13.3% in other registries, but the highest rates of posterior-stabilized total knee arthroplasties (48.5% compared to 8.2%-28.7%) and patella resurfacing (93.9% compared to 2.4%-51.6%). ConclusionSeveral differences in hip and knee arthroplasty practices exist between the United States and other countries. Future studies should focus on understanding why differences in practice trends exist and assess outcomes associated with these practices. Level of EvidenceLevel III, retrospective.

Arthroscopic Identification and Management of Recurrent Iliopsoas Impingement After Total Hip Arthroplasty

Arthroscopic release of the iliopsoas tendon for iliopsoas impingement (IPI) after total hip arthroplasty (THA) at the lesser trochanter gives good results. However, where IPI then recurs, due to adhesions between the healing iliopsoas tendon and the surrounding soft tissue, and nonoperative measures have failed, a revision THA procedure is usually considered. We propose a technique of arthroscopic visualization of the recurrent IPI and a subsequent psoas tenotomy at the level of the hip joint using an outside-in capsulotomy approach. This secondary tenotomy, located proximally directly at the level of the recurrent impingement, allows relief of the painful symptoms without compromising the muscle function of the iliopsoas and precludes the need for a complex THA revision.

Current Epidemiology of Revision Total Hip Arthroplasty in the United States: National Inpatient Sample 2009 to 2013

BackgroundDespite the excellent outcomes associated with primary total hip arthroplasty (THA), implant failure and revision continues to burden the healthcare system. THA failure has evolved and displays variability throughout the literature. In order to understand how THAs are failing and how to reduce this burden, it is essential to assess modes of implant failure on a large scale. Thus, we report: (1) etiologies for revision THA; (2) frequencies of revision THA procedures; (3) patient demographics, payor type, and US Census region of revision THA patients; and (4) the length of stay and total costs based on the type of revision THA procedure. MethodsWe queried the National Inpatient Sample database for all revision THA procedures performed between January 1, 2009 and December 31, 2013. This yielded 258,461 revision THAs. Patients specific demographics were identified in order to determine the prevalence of revision procedure performed. ResultsDislocation was the main indication for revision THA (17.3%), followed by mechanical loosening (16.8%). All-component revision was the most common procedure performed (41.8%). Patients were most commonly white (77.4%), aged 75 years and older (31.6%), and resided in the South US Census region (37.0%). The average length of stay for all procedures was 5.29 days. The mean total charge for revision THA procedures was $77,851.24. ConclusionDislocation and mechanical loosening is the predominant indication for revision THA in the United States. With the frequency of revision THAs projected to double in the next decade, orthopedists must take steps to mitigate this potentially devastating complication.

The treatment of acetabular bone loss with associated pelvic discontinuity in revision of total hip arthroplasty: Acetabular distraction technique

Abstract Introduction: As the number of primary total hip arthroplasty (THA) procedures performed continues to rise, the burden of revision THA procedures is also expected to increase. With patients undergoing THA at younger ages and living longer, revision patients are presenting with greater bone loss at the time of revision surgery. The proper evaluation and treatment of acetabular bone loss at the time of revision surgery is complex and is further complicated in the face of a chronic pelvic discontinuity. Identifying proper pre-operative patient assessment in conjunction with detailed pre-operative planning is essential for obtaining favorable clinical results. Appropriate radiographs are critical in assessing acetabular bone loss, and specific classification schemes can identify bone loss patterns and guide available treatment options. The presentation reviews the surgical decision making and clinical results of different surgical options for the treatment of acetabular bone loss, and introduces a novel technique for the treatment of a chronic pelvic discontinuity. Background: Pelvic intermittence happens frequently in patients of female sex, with a background marked by earlier pelvic radiation or rheumatoid arthritis.The two most normal order frameworks are the AAOS Classification System and the Paprosky Classification, with the Paprosky Classification giving treatment proposals dependent on the degree and area of bone misfortune, accordingly considering pre-usable planning. also, follow-up examines have shown sufficient legitimacy and dependability of this grouping framework. There are three significant elements concerning accomplishing an effective result while rewarding pelvic intermittence: the measure of bone stock staying, biologic in-development potential, and the recuperating capability of the discontinuity. Treatment choices incorporate pen recreation with mass acetabular allograft, custom triflange acetabular segment (CTAC), a cup-confine build, enormous acetabular cup with permeable metal expands, or acetabular interruption with a permeable tantalum shell with or without secluded permeable increases. This audit article talks about grouping, assessment, recreation choices and results of incessant pelvic brokenness. Method:- Positive clinical results depend on cautious assessment and pre-usable arranging. Patients frequently present clinically with torment, trouble with ambulation and leg-length error because of relocation of the cup and hip focus. A point by point history ought to be recorded seeing the list technique just as pre-and post-employable indications. A full arrangement of radiographs ought to be gotten including an anteroposterior (AP) pelvis, AP and horizontal of the hip, and a cross-table parallel of the hip. Now and again, a processed tomography (CT) can be an amazing aide to survey the degree and area of bone misfortune, as it is much of the time thought little of on plain radiographs.13 In cases with serious average relocation, CT angiography ought to be acquired to comprehend the relationship of intra-pelvic neurovascular structures to the acetabular segment. Pre-usable research center assessment including white platelet tally, erythrocyte sedimentation rate, and C-receptive protein ought to be gotten before all correction THAs. Raised markers should provoke a pre-usable hip yearning. Results: Acetabular bone misfortune and constant pelvic brokenness in correction THA is a difficult and progressively visit issue. Suitable pre-employable workup and adjustment procedures are expected to get long haul cementless obsession and develop security. The Paprosky characterization framework ought to be utilized all together the assistance direct the fitting treatment intercession. Numerous treatment choices are accessible and show acceptable results. Our treatment of decision for ceaseless pelvic intermittence is acetabular interruption strategy with or without the utilization of permeable metal secluded enlarges. Information in regards to treatment results of interruption are restricted, however early results are promising, and this is the creator's favored treatment for interminable pelvic intermittence. Biography: Neil Sheth is an Assistant Professor of Orthopaedic Surgery at University of Pennsylvania. He is also the Pennsylvania Hospital Site Director for the adult reconstruction hip and knee fellowship. He obtained his Under-graduate degree in Biomedical Engineering with a minor in Finance at University of Pennsylvania. He then spent two years on Wall Street as a Financial Analyst at Solomon Smith Barney's Healthcare Investment banking division prior to attending medical school at Albany Medical College. Following medical school, he completed six year Orthopaedic Surgery Residency at Hospital of the University of Pennsylvania. Following residency, he completed an adult hip and knee reconstruction fellowship at Rush University as well as a three-month mini-fellowship at the Endo Klinik in Hamburg, Germany focusing on peri-prosthetic infection. He is currently leading a team to build an orthopedic center of excellence in Moshi, Tanzania.

Single-component revisions are associated with dislocation after revision total hip arthroplasty at intermediate-term follow-up.

Dislocation is the most frequent complication following revision total hip arthroplasty (THA). Although several risk factors for dislocation in revision THA have been described, many cannot be modified at the time of surgery. Identifying modifiable risk factors for subsequent dislocation after revision THA provides opportunity for orthopedic surgeons to decrease instability. A retrospective analysis of 203 consecutive revision THA procedures performed by a single surgeon with a minimum 2-year follow-up between May 2003 and June 2012 was performed. 2 (1.0%) died and 14 (6.9%) were lost to follow-up leaving 187 (92%) revision procedures in 123 men and 64 women. Univariate and multivariate logistic regression was used to identify risk factors for dislocation. 9 (4.8%) of all patients reviewed experienced a dislocation episode. Of those, 8 (89%) had a single component revised, 6 (67%) were women, and 4 (44%) had a history of recurrent dislocation. 2 of 14 (14%) patients with a constrained liner dislocated. Univariate analysis demonstrated that single-component revisions were at higher risk for dislocation after the surgery (p value = 0.033). Identifying modifiable risk factors for dislocation after revision THA provide opportunity to decrease rates of instability. Based on our data, single-component revision THA is a risk factor for subsequent dislocation.

Contemporary Surgical Indications and Referral Trends in Revision Total Hip Arthroplasty: A 10-Year Review

BackgroundRevision total hip arthroplasty (THA) represents nearly 15% of all hip arthroplasty procedures in the United States and is projected to increase. The purpose of our study was to summarize the contemporary indications for revision THA surgery at a tertiary referral medical center. We also sought to identify the indications for early and late revision surgery and define the prevalence of outside institution referral for revision THA. MethodsUsing our institution's arthroplasty registry, we identified a retrospective cohort of 870 consecutive patients who underwent revision THA at our hospital from 2004 to 2014. Records were reviewed to collect data on patient's primary and revision THA procedures, and the interval between primary THA and revision surgery was determined. ResultsAseptic loosening (31.3%), osteolysis (21.8%), and instability (21.4%) were the overall most common indications for revision THA and the most common indications for revision surgery within 5 years of primary THA. Aseptic loosening and osteolysis were the most common indications for revision greater than 5 years from primary THA. Only 16.4% of revised hips had their index arthroplasty performed at our hospital, whereas 83.6% were referred to our institution. ConclusionsAseptic loosening, osteolysis, and instability remain the most common contemporary indications for revision THA in an era of alternative bearings and modular components. Most of our revisions were referred from outside institutions, which highlights the transfer of a large portion of the revision THA burden to tertiary referral centers, a pattern that could be exacerbated under future bundled payment models.

Femoral Bone Loss in Revision Total Hip Arthroplasty: Evaluation and Management

Primary total hip arthroplasty (THA) is one of the most effective procedures for managing end-stage hip arthritis. The burden of revision THA procedures is expected to increase along with the rise in number of primary THAs. The major indications for revision THA include instability, aseptic loosening, infection, osteolysis, wear-related complications, periprosthetic fracture, component malposition, and catastrophic implant fracture. Each of these conditions may be associated with mild or advanced bone loss. Careful patient evaluation and bone loss classification guide preoperative planning and overall patient care. Historically, uncemented fixation has provided the best results, but cemented fixation is required in some cases.

Acetabular Bone Loss in Revision Total Hip Arthroplasty: Evaluation and Management

As the number of primary total hip arthroplasty (THA) procedures performed continues to rise, the burden of revision THA procedures is also expected to increase. Proper evaluation and management of acetabular bone loss at the time of revision surgery will be an increasing challenge facing orthopaedic surgeons. Proper preoperative patient assessment and detailed preoperative planning are essential in obtaining a good clinical result. Appropriate radiographs are critical in assessing acetabular bone loss, and specific classification schemes can identify bone loss patterns and guide available treatment options. Treatment options include impaction grafting and cementation of the acetabulum, noncemented hemispheric acetabular reconstruction, structural allograft reconstruction, noncemented reconstruction with modular porous metal augments, ring and cage reconstruction, oblong cup reconstruction, cup-cage reconstruction, and triflange reconstruction.

The Epidemiology of Total Hip Arthroplasty in England and Wales

The aim of this study is to evaluate the frequency and causes of revision hip surgery in England and Wales. The England and Wales National Joint Registry was accessed. All revision total hip arthroplasty procedures performed between January 1, 2010 and December 31, 2010 were identified and scrutinized. Aseptic loosening and pain were the most common causes of revision surgery. Revision of both acetabular and femoral components is the most common procedure. Revision hip arthroplasty is a growing burden worldwide. Underlying reasons for failure are multifactorial. This paper describes the mechanisms of failure and revision procedures.

Comparative Long-Term Survivorship of Uncemented Acetabular Components in Revision Total Hip Arthroplasty

It is unknown whether the long-term survival of uncemented acetabular components in revision total hip arthroplasty varies according to component type. The purpose of this study was to compare the survivorship of historical and current uncemented acetabular components following revision total hip arthroplasty. The study population included 3236 patients who underwent 3448 revision total hip arthroplasty procedures with an uncemented acetabular component at a large United States medical center between January 1, 1984, and December 31, 2004. Patients were actively followed up at regular intervals to ascertain details of subsequent revision surgical procedures, including cup (metal shell plus liner) and liner revisions. The overall survival and the cause-specific survival of ten different acetabular components were compared with use of Cox proportional-hazards regression models, adjusting for age and sex. A total of 605 repeat revisions, including 386 cup revisions, were performed. The corresponding overall survival rate at fifteen years was 69% (95% confidence interval [CI], 67% to 72%). Compared with titanium wire mesh designs, cup revision for aseptic loosening was significantly more common with beaded designs (hazard ratio [HR], 2.01; 95% CI, 1.44 to 2.80) but less common with trabecular metal designs (HR, 0.25; 95% CI, 0.06 to 1.04). There were no liner revisions for wear and/or osteolysis during a median of 5.2 years of follow-up of 534 total hip arthroplasties with cross-linked polyethylene liners, resulting in a significantly lower risk of wear-related revision with cross-linked polyethylene compared with conventional liners. Femoral head size and use of an elevated liner were not associated with the risk of repeat revision. In the setting of revision total hip arthroplasty, cup survival was worse with beaded acetabular designs compared with titanium wire mesh or highly porous designs. Cross-linked polyethylene liners were associated with a reduced risk of wear-related liner revision.

Glove perforation time and frequency in total hip arthroplasty procedures

The aim of the present study was to investigate glove perforation rate and time and evaluate the factors affecting glove perforation in total hip arthroplasty (THA). Nine hundred seventy-nine gloves used in 57 THA procedures were assessed according to the perforation. Forty-four (77.2%) procedures were primary THA and 13 (22.8%) were revision THA. Gloves were changed when perforated, become dirty with blood or blood products, and before bone cementing. All gloves were filled with water at the end of the operation and controlled for perforation. Two hundred and one surgical gloves used during scrubbing and removed after draping the patient were examined as the control group. The location (which finger), number and time of the perforation, surgery type and duration, and distribution of the perforation location according to the surgical team were assessed. Patients' mean age was 62.9 ± 14.6 (range: 33 to 97) years and the mean surgery duration was 162.9 ± 32.0 minutes. Thirty-two glove perforations were noted in 19 of the operations. Of these perforations, 28 belonged to the surgeons and first assistants. There was no significant difference between the dominant or non-dominant hand according to the location of perforations. Perforations in the first and second fingers of the gloves accounted for 81.3% of all perforations. There was no significant difference in terms of number of gloves used, perforation numbers and operation duration between the primary and revision THA procedures. Two perforated gloves (0.99%) were found in the control group and the difference between the number of perforations in the control and study groups was significant (p=0.048). We recommend the use of two pairs of gloves to avoid the risk of contamination and protect the surgical team from infectious disease in major surgeries like THA. Surgical gloves should be changed when they are excessively contaminated with surgical fluids and the surgeon and first assistant should also change their outer gloves at an average of every 90 minutes.

Hospital Outcome After Emergent vs Elective Revision Total Hip Arthroplasty

This is a retrospective review of inpatient outcomes, based upon emergent or elective admission for revision total hip arthroplasty (THA) procedures performed between 2000 and 2006. Three hundred forty-two revision THA procedures (291 elective, 51 emergent) were identified. Emergent revisions were more likely to be older (69.9 vs 62.7; P = .003), women (72% vs 54%), require longer hospitalization (8.3 vs 3.8 days), and require a skilled care facility at discharge. No significant difference was observed in mortality. We identified 2 basic outcome measures suggesting that patients undergoing emergent revision will have a more complex hospitalization and require more assistance at discharge. Clarifying emergent vs elective THA at admission may assist in better planning and assessment of patient needs regarding rehabilitation, hospital management, and discharge planning.

The Validity of Using Administrative Codes in Total Hip Arthroplasty (THA) Outcomes Research

s e23 Paper #23 The Validity of Using Administrative Codes in Total Hip Arthroplasty (THA) Outcomes Research Kevin J. Bozic, MD, MBA, Vanessa W. Chiu, MPH, Jordan Greenbaum, MD, Thomas M. Smith, DO, Harry E. Rubash, MD, Thomas P. Vail, MD, Daniel J. Berry, MD Introduction: The validity of using administratively coded diagnosis and procedure codes to define inclusion and outcome criteria for orthopedic outcomes research has not yet been verified. The purpose of this study was to evaluate concordance between administrative and clinical diagnosis and procedure codes for revision THA. Methods: Administratively coded diagnosis and procedure codes obtained from hospital billing records from 282 consecutive revision THA procedures performed at 3 institutions were compared to clinical documentation, including operative notes and discharge summaries. Concordance between the administrative and clinical records was determined for each revision THA-related ICD-9 diagnosis and procedure code. Results: The concordance rate between the administrative and clinical diagnosis codes ranged from a high of 98% for a diagnosis of mechanical loosening to a low of 27% for a diagnosis of prosthetic failure/ breakage. Concordance rates between administrative and clinical procedure codes ranged from a high of 85% for acetabular component revision THA procedures to a low of 50% for both (acetabular and femoral) component revision THA procedures. Isolated acetabular liner and femoral head exchange procedures were frequently miscoded as both (acetabular and femoral) component revisions. Conclusion: New, more descriptive ICD-9-CM diagnosis and procedure codes related to revision THA procedures offer the opportunity to use large, nationally representative administrative databases to evaluate THA outcomes. THA-specific ICD-9 diagnosis codes, with the exception of prosthetic implant failure/ breakage, appear to accurately reflect the clinical record. However, THA-specific ICD-9 procedure codes are less accurate. Continued education of clinicians and administrative coding personnel is needed to improve the accuracy and validity of these codes.

Femoral and acetabular revision using impacted nondemineralized freeze-dried bone allografts

BackgroundFavorable results have been obtained by the use of deep-frozen bone allografts in total hip arthroplasty. However, owing to the shortage of deep-frozen allografts and the risk of infectious disease, other materials have been studied, such as sterile nondemineralized freeze-dried allografts. The aim of this study was to describe midterm clinical outcomes and radiographic bone incorporation of human freeze-dried bone grafts in 42 revision total hip arthroplasty procedures using cancellous impacted bone grafting. MethodsThis report presented clinical and radiographic evidence of allograft incorporation in 42 hip reconstructions performed between 1996 and 2002. The patient group included 13 (31%) men and 29 (69%) women with mean ± SD age of 63 ± 14 years (range 28-80 years). Mean follow-up was 82 months (range 63-127) months. Clinical analysis was based on the D’Aubigne-Postel score. Radiographic incorporation was defined according to specific criteria. ResultsThe D’Aubigne and Postel criteria showed adequate outcome in 38 (90%) of the patients. The radiographic evaluation revealed that allograft remodeling and incorporation were found in 39 (93.0%) and 36 (86.5%) of acetabular and femoral cases, respectively. The overall graft survival rate at an average follow-up of 8 years (range 5-10 years) was 90%. ConclusionsBone grafts obtained by the lyophilization process developed and carried out in our tissue bank provide suitable grafts for revision total hip arthroplasty. Clinical and radiographic midterm results were excellent, indicating that nondemineralized freeze-dried bone allografts are suitable for replacing deep-frozen grafts.