Transtibial osseointegration following unilateral traumatic amputation: An observational study of patients with at least two years follow-up.

IMPORTANCE: Most patients use a traditional socket prosthesis (TSP) to ambulate independently following transtibial amputation. However, these patients generally require prosthesis repairs more than twice annually and an entirely new prosthesis every two years. Furthermore, transtibial amputation patients have four times the skin ulceration rate of transfemoral patients, prompting more frequent prosthesis refitting and diminished use. Trans-Tibial osseointegration (TTOI) is a promising technique to address the limitations of TSP, but remains understudied with only four cohorts totaling 41 total procedures reported previously. Continued concerns regarding the risk of infection and questions as to functional capacity postoperatively have slowed adoption of TTOI worldwide. OBJECTIVE: This study reports the changes in mobility, quality of life (QOL), and the safety profile of the largest described cohort of patients with unilateral TTOI following traumatic amputation. DESIGN: Retrospective observational cohort study. The cohort consisted of patients with data outcomes collected before and after osseointegration intervention. SETTING: A large, tertiary referral, major metropolitan center. PARTICIPANTS: Twenty-one skeletally mature adults who had failed socket prosthesis rehabilitation, with at least two years of post-osseointegration follow-up. MAIN OUTCOMES AND MEASURES: Mobility was evaluated by K-level, Timed Up and Go (TUG), and Six Minute Walk Test (6MWT). QOL was assessed by survey: daily prosthesis wear hours, prosthesis problem experience, general contentment with prosthesis, and Short Form 36 (SF36). Adverse events included any relevant unplanned surgery such as for infection, fracture, implant loosening, or implant failure. RESULTS: All patients demonstrated statistically significant improvement post osseointegration surgery with respect to K-level, TUG, 6MWT, prosthesis wear hours, prosthesis problem experience, general prosthesis contentment score, and SF36 Physical Component Score (p < 0.01 for all). Three patients had four unplanned surgeries: two soft tissue refashionings, and one soft tissue debridement followed eventually by implant removal. No deaths, postoperative systemic complications, more proximal amputations, or periprosthetic fractures occurred. CONCLUSIONS AND RELEVANCE: TTOI is likely to confer mobility and QOL improvements to patients dissatisfied with TSP rehabilitation following unilateral traumatic transtibial amputation. Adverse events are relatively infrequent and not further disabling. Judicious use of TTOI seems reasonable for properly selected patients. LEVEL OF EVIDENCE: 2 (Therapeutic investigation, Observational study with dramatic effect).

Osseointegrated reconstruction and rehabilitation of transtibial amputees: the Osseointegration Group of Australia surgical technique and protocol for a prospective cohort study.

INTRODUCTION: Lower extremity amputation uniformly impairs a person's vocational, social and recreational capacity. Rehabilitation in traditional socket prostheses (TSP) is associated with a spectrum of complications involving the socket-residuum interface which lead to reduced prosthetic use and quality of life. Osseointegration has recently emerged as a novel concept to overcome these complications by eliminating this interface and anchoring the prosthesis directly to bone. Though the complications of TSPs affect both transfemoral and transtibial amputees, Osseointegration has been predominantly performed in transfemoral ones assuming a greater benefit/risk ratio. However, as the safety of the procedure has been established, we intend to extend the concept to transtibial amputees and document the outcomes. METHODS AND ANALYSIS: This is protocol for a prospective cohort study, with patient enrolment started in 2014 and expected to be completed by 2022. The inclusion criteria are age over 18 years, unilateral, bilateral and mixed transtibial amputation and experiencing socket-related problems. All patients receive osseointegrated implants, the type of which depend on the length of the residuum and quality of bone, which are press-fitted into the residual bone. Objective functional outcomes comprising 6-Minute Walk Test, Timed Up-and-Go test and K-level, subjective patient-reported-quality-of-life outcomes (Short Form Health Survey 36, daily prosthetic wear hours, prosthetic wear satisfaction) and adverse events are recorded preoperatively and at postoperative follow-up intervals of 3, 6, 12 months and yearly, and compared with the preoperative values using appropriate statistical tests. Multivariable multilevel logistic regression will be performed with a focus to identify factors associated with outcomes and adverse events, specifically infection, periprosthetic fracture, implant fracture and aseptic loosening. ETHICS AND DISSEMINATION: The Ethics approval for the study has been received from the University of Notre Dame, Sydney, Australia (014153S). The outcomes of this study will be disseminated by publications in peer-reviewed academic journals and scientific presentations at relevant orthopaedic conferences.

Comparison of Functional Outcomes of Computer-Assisted vs Conventional Total Knee Arthroplasty: A Systematic Review and Meta-Analysis of High-Quality, Prospective Studies.

BACKGROUND: Computer-assisted navigation system (CAS) in total knee arthroplasty (TKA) has been shown to improve mechanical alignment and prosthesis positioning as compared to conventional TKA. However, the evidence with regard to whether CAS-TKA has better patient function over conventional TKA is not clear. This systematic review and meta-analysis compares functional outcomes of CAS vs conventional TKA at longer follow-up periods. METHODS: This study was conducted in accordance with PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. PubMed, Embase, gray literature, and clinicaltrials.gov were searched up to April 30, 2018. All prospective original studies (only level 1 and 2) that compared functional outcomes of CAS-TKA vs conventional TKA, with minimum 2-year follow-up, were included. The research question and eligibility criteria were established a priori. Pertinent data were extracted and random-effects model was used. RESULTS: A total of 18 studies with 3060 knees were included; of which 1538 underwent TKA with CAS and 1522 underwent conventional TKA. Studies were grouped based on the follow-up reported into: (1) ≥2 years to <5 years; (2) ≥5 years to <8 years; (3) >8 years. Pooled mean Western Ontario and McMaster Universities Osteoarthritis Index scores (P < .001) and Knee Society Score-function score (P = .03) were better in the CAS-TKA group in the 5- to 8-year follow-up. For the remaining follow-ups, there was no difference between the 2 groups. CONCLUSION: The meta-analysis concluded that there is limited evidence that CAS-TKA improves functional outcomes at 5- to 8-year follow-up as measured by Western Ontario and McMaster Universities Osteoarthritis Index and Knee Society Score-function scores. More prospective studies with larger sample size and longer-term follow-up are required to support the trend toward better functional outcomes with CAS.

Reliability of intra-operative frozen section study in revision of infected hip arthroplasty.

INTRODUCTION: Frozen sections are extensively used to help in the diagnosis of periprosthetic joint infection during revision hip arthroplasty, though there are insufficient data in relation to its usefulness. METHODS: Twenty-one patients with infected hip arthroplasties were operated in the form of one or two-staged revision hip arthroplasties. A frozen section was obtained intra-operatively and > 5 PMN's/ HPF was considered as a positive indicator of infection. If the frozen section was reported negative (≤5 PMN's/HPF), the revision prosthesis was implanted after a thorough debridement and a wash. If the frozen section was reported as positive, post the debridement; a non-articulating antibiotic-loaded cement spacer was implanted for 8 weeks, supplemented with 3 weeks of intravenous antibiotics and 3 weeks of oral antibiotics. This was followed by an antibiotic-free interval of 2 weeks. The patient was taken up for a revision surgery once the frozen section study was negative (≤5 PMN's/HPF). The patients were followed up for a minimum of 1 year to a maximum of 2 years after the revision for any evidence of infection (assessed clinically, serologically, and radiologically). RESULTS: Frozen section analysis of PMNs per high power field had a 100% specificity in our patients in detecting periprosthetic joint infection. CONCLUSION: Frozen section study is a safe, rapid, cheap and reliable intra-operative modality to diagnose periprosthetic joint infection.

Enchondroma with Osteopoikilosis Coexisting Together -A Rare Clinical and Radiological Case Report.

INTRODUCTION: Osteopoikilosis and enchondroma existing together have not been reported in literature, and this is the first report of the management of the same. CASE REPORT: A 26-year-old male presented with dull aching pain with swelling around the knuckle of the left index finger of 1 month duration. On examination, there was a swelling of approximately 1x1 cm on the dorsal aspect. Typical radiographic changes of osteopoikilosis and enchondroma were present. CONCLUSION: Enchondroma coexistence with osteopoikilosis is rare. Diagnosis is suspected on plain radiographs and confirmed by the histopathologic study. Enucleation of the tumor with bone graft provides good results.

Factors Affecting Compliance to Antihypertensive Treatment among Adults in a Tertiary Care Hospital in Mumbai.

BACKGROUND: Compliance to antihypertensive therapy reduces the risk of complications. It is important to understand the factors affecting compliance in patients so that the goal of successful treatment is not jeopardized. OBJECTIVES: To determine the proportion of participants' compliant to treatment and various factors associated with compliance of antihypertensive treatment. SETTINGS AND DESIGN: A cross-sectional study of 330 hypertensive patients on treatment attending the outpatient department of a tertiary care hospital in Mumbai. SUBJECTS AND METHODS: It was conducted over 8 weeks using a validated, pretested questionnaire including information on the individual's sociodemographic profile, compliance to antihypertensive therapy and lifestyle advice assessed using a 4-point Likert scale. STATISTICAL ANALYSIS: Data were entered into MS Excel 2007 and analyzed using SPSS 20. RESULTS: Participants' mean age was 55.2 ± 12.6 years. 39.4% were compliant to their treatment. Common reasons for frequently skipping the dose - forgetfulness (41.2%) and discontinued the medication when feeling well (30.3%). Factors positively associated with compliance were gender and illiteracy. The proportion of noncompliance among smokers and alcoholics was statistically significant. CONCLUSION: Forgetfulness and subjective feeling of wellness were the prevalent reasons for noncompliance. Controlling habits such as smoking and alcohol may prove as key factors for compliance.