Efficacy of arthroscopic treatment for resolving infection in septic arthritis of native joints

Native Joint Septic Arthritis

Native joint septic arthritis (NJSA) is a severe and rapidly progressing joint infection, predominantly bacterial but also potentially fungal or viral, characterized by synovial membrane inflammation and joint damage, necessitating urgent and multidisciplinary management to prevent permanent joint damage and systemic sepsis. Common in large joints like knees, hips, shoulders, and elbows, NJSA's incidence is elevated in individuals with conditions like rheumatoid arthritis, diabetes, immunosuppression, joint replacement history, or intravenous drug use. This review provides a comprehensive overview of NJSA, encompassing its diagnosis, treatment, antibiotic therapy duration, and surgical interventions, as well as the comparison between arthroscopic and open debridement approaches. Additionally, it explores the unique challenges of managing NJSA in patients who have undergone graft anterior cruciate ligament (ACL) reconstruction. The epidemiology, risk factors, pathogenesis, microbiology, clinical manifestations, diagnosis, differential diagnosis, antibiotic treatment, surgical intervention, prevention, and prophylaxis of NJSA are discussed, highlighting the need for prompt diagnosis, aggressive treatment, and ongoing research to enhance patient outcomes.

Associations with unplanned repeat irrigation and debridement of native septic arthritis

PURPOSE

To identify associations with unplanned repeat irrigation and debridement (I&D) after arthrotomy for native septic arthritis.

METHODS

A retrospective review identified patients with native septic arthritis treated with open arthrotomies. The primary outcome was unplanned repeat I&D within 90 days. Associations evaluated for included comorbidities, ability to bear weight, fever, immunosuppressed status, purulence, C-reactive protein, erythrocyte sedimentation rate, white blood cell count (synovial fluid and serum levels), and synovial fluid polymorphonuclear cell percentage (PMN%).

RESULTS

There were 59 arthrotomies in 53 patients involving the knee (n = 32), shoulder (n = 10), elbow (n = 8), ankle (n = 6), and hip (n = 3). The median patient age was 52, and a 71.2% were male. An unplanned repeat I&D was required in 40.7% (n = 24). The median time to the second I&D was 4 days (interquartile range 3 to 9). On univariate analysis, unplanned repeat I&Ds were associated with fever (p = 0.03), purulence (p = 0.01), bacteria growth on cultures (p = 0.02), and the use of deep drains (p = 0.05). On multivariate analysis, the only variables that remained associated with unplanned repeat I&Ds were fever (odds ratio (OR) 5.5, 95% confidence interval (CI) 1.3, 23.6, p = 0.02) and purulence (OR 5.3, CI 1.1, 24.4, p = 0.03).

CONCLUSIONS

An unplanned repeat I&D was required in 40.7% of patients and was associated with fever and purulence. These findings highlight the difficulty of controlling these infections and support the need for future research into better methods of management.

LEVEL OF EVIDENCE

Diagnostic, Level III.

Does arthroscopic or open washout in native knee septic arthritis result in superior post-operative function? A systematic review and meta-analysis of randomised controlled trials and observational studies

AIMS

Septic arthritis (SA) of the native knee joint is associated with significant morbidity. This review compared post-operative functional outcomes (patient-reported outcome measures (PROMs) and range of movement (ROM)) following arthroscopic washout (AW) and open washout (OW) amongst adult patients with SA of the native knee. The need for further operative intervention was also considered.

METHODS

Electronic databases of PubMed, MEDLINE, Embase, Cochrane, Web of Science and Scopus were searched between 16 February 2023 and 18 March 2023. Randomised controlled trials (RCTs) and comparative observational analytic studies comparing function (reflected in PROMs or ROM) at latest follow-up following AW and OW were included. A narrative summary was provided concerning post-operative PROMs. Pooled estimates for mean ROM and re-operation rates were conducted using the random-effects model. The risk of bias was assessed using the Cochrane risk-of-bias assessment tool-2 for RCTs and the Risk of Bias in Non-Randomized Studies of Interventions tool for observational analytic studies.

RESULTS

Of 2580 retrieved citations, 7 articles (1 RCT and 6 cohort studies) met the inclusion criteria. Of these, five had some concerns/moderate risk of bias, and two had serious risk. There was a slight tendency for superior mean PROMs following AW compared with OW, but due to small effect sizes, this was unlikely clinically relevant. Additionally, the use of four different PROMs scales made direct comparisons impossible. AW was associated with superior ROM (mean difference 20.18° (95% CI 14.35, 26.02; p < 0.00001)), whilst there was a tendency for lower re-operation requirements following AW (OR 0.64, 95% CI 0.26, 1.57, p = 0.44).

CONCLUSIONS

AW was associated with equivalent to superior post-operative function and lower requirement for further intervention compared with OW. Results need to be interpreted cautiously, taking into consideration the methodological and clinical heterogeneity of the included studies.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO 2022, CRD42022364062.

Upper extremity infection: imaging features with focus on magnetic resonance imaging

Upper extremity infections are frequently seen, especially in individuals with weakened immune system, posttraumatic events, and after surgery procedures. If not properly treated, such conditions can lead to serious consequences, such as movement impairment, amputation, and even mortality. These infections have the potential to spread extensively from their initial site of entry, traversing interconnected spaces either intra or extra-compartmental. Understanding the relevant anatomy is crucial to assess location and stage of infection, since surgical intervention and intravenous antibiotics are usually required. In this article, the authors provide a comprehensive review of the imaging findings of upper extremity infection, focusing on magnetic resonance imaging (MRI). Furthermore, this article sheds light on the pivotal role of radiology in managing hand, elbow, and shoulder infections offering an overview of available treatment options. KEY FINDINGS: Various types of infections affecting the upper extremity will be discussed, including infectious tenosynovitis, deep space infections, septic arthritis, and osteomyelitis. Authors also highlight anatomical spaces, common pathogens, spread routes, and key radiological features of these conditions.

Failure rates in surgical treatment in adults with bacterial arthritis of a native joint: a systematic review of 8,586 native joints

INTRODUCTION

Most adult cases of bacterial-septic-arthritis of a native joint are effectively managed with a single surgical debridement, but some cases may require more than one debridement to control the infection. Consequently, this study assessed the failure rate of a single surgical debridement in adults with bacterial arthritis of a native joint. Additionally, risk factors for failure were assessed.

MATERIALS AND METHODS

The review protocol was registered on PROSPERO (CRD42021243460) before data collection and conducted in line with the 'Preferred Reporting Items for Systematic Reviews and Meta-Analyses' (PRISMA) guidelines. Multiple libraries were systematically searched to identify articles including patients reporting on the incidence of failure (i.e. persistence of infection requiring reoperation) of the treatment of bacterial arthritis. The quality of individual evidence were assessed using the Quality in Prognosis Studies (QUIPS) tool. Failure rates were extracted from included studies and pooled. Risk factors for failure were extracted and grouped. Moreover, we evaluated which risk factors were significantly associated with failure.

RESULTS

Thirty studies (8,586 native joints) were included in the final analysis. The overall pooled failure rate was 26% (95% CI 20 to 32%). The failure rate of arthroscopy and arthrotomy was 26% (95% CI 19 to 34%) and 24% (95% CI 17 to 33%), respectively. Seventy-nine potential risk factors were extracted and grouped. Moderate evidence was found for one risk factor (synovial white blood cell count), and limited evidence was found for five risk factors (i.e. sepsis, large joint infection, the volume of irrigation, blood urea nitrogen-test, and blood urea nitrogen/creatinine ratio).

CONCLUSION

A single surgical debridement fails to control bacterial arthritis of a native joint in approximately a quarter of all adult cases. Limited to moderate evidence exists that risk factors associated with failure are: synovial white blood cell count, sepsis, large joint infection, and the volume of irrigation. These factors should urge physicians to be especially receptive to signs of an adverse clinical course.

Microbubble cavitation restores Staphylococcus aureus antibiotic susceptibility in vitro and in a septic arthritis model

Treatment failure in joint infections is associated with fibrinous, antibiotic-resistant, floating and tissue-associated Staphylococcus aureus aggregates formed in synovial fluid (SynF). We explore whether antibiotic activity could be increased against Staphylococcus aureus aggregates using ultrasound-triggered microbubble destruction (UTMD), in vitro and in a porcine model of septic arthritis. In vitro, when bacterially laden SynF is diluted, akin to the dilution achieved clinically with lavage and local injection of antibiotics, amikacin and ultrasound application result in increased bacterial metabolism, aggregate permeabilization, and a 4-5 log decrease in colony forming units, independent of microbubble destruction. Without SynF dilution, amikacin + UTMD does not increase antibiotic activity. Importantly, in the porcine model of septic arthritis, no bacteria are recovered from the SynF after treatment with amikacin and UTMD-ultrasound without UTMD is insufficient. Our data suggest that UTMD + antibiotics may serve as an important adjunct for the treatment of septic arthritis.

S. AUREUS IS ASSOCIATED WITH A GREATER NEED FOR REOPERATION IN SEPTIC ARTHRITIS OF THE KNEE

Objective

To determine the frequency of reoperations in the treatment of adult patients diagnosed with septic arthritis of the knee, the average number of debridements needed to control the infection, the mortality rate, and to assess factors associated with a greater need for reoperation and mortality.

Methods

Retrospective cohort study evaluating 38 adult patients diagnosed with septic arthritis who underwent arthrotomy via a medial parapatellar approach for joint cleaning and debridement. Demographic, clinical, surgical, and microbiological variables of the cases were analyzed by review of medical records. Tests for equality of two proportions, chi-square, and multivariate logistic regression analysis were performed, defining a significance level at 0.05, with 95% confidence interval.

Results

A total of 50% of the cases underwent reoperation, with an average number of required debridement of 2.02 and a mortality rate of 10.5%. Patients with infection caused by Staphylococcus aureus were more likely to need a reoperation compared to patients with positive cultures for other agents (OR 6.0).

Conclusion

In 50% of cases, an average of 2.02 debridements were necessary and the mortality rate was 10.5%. Staphylococcus aureus infection is associated with a 6 times greater chance of additional surgeries. / Level of Evidence IV, Case Series.

Arthroscopic Treatment Yields Lower Reoperation Rates than Open Treatment for Native Knee but Not Native Shoulder Septic Arthritis

Purpose

To compare the incidence, patient demographics, complication rates, readmission rates, and reoperation rates of open and arthroscopic surgery performed for septic arthritis in native knee and shoulder joints.

Methods

Records of patients who were diagnosed with native knee or shoulder septic arthritis and underwent open or arthroscopic irrigation and debridement (I&D) between 2015 and 2018 were queried from the PearlDiver Mariner Database. International Classification of Diseases 10th (ICD-10) diagnosis and procedure codes were used to identify patients and track reoperations. Reoperation procedures, including revision open and arthroscopic I&D, were analyzed at 1 month, 1 year, and 2 years. Complications, emergency department (ED) admissions, and hospital readmissions within 30 days were analyzed and compared between the open and arthroscopic cohorts.

Results

The query resulted with 1,993 patients who underwent knee I&D (75.3% arthroscopic, 24.7% open, P < .001) and 476 patients who underwent shoulder I&D (64.8% arthroscopic, 35.2% open, P < .001). One-month complication rates (11.6-22.7%) and hospital readmission rates (15.8-19.6%) were similar for arthroscopic and open treatment for knee and shoulder septic arthritis. Reoperation rates for revision I&D of the knee were higher after open compared to arthroscopic treatment at 1 month, 1 and 2 years (20.9% vs. 16.7%, 32.5% vs 27.6% and 34.1% vs. 29.4%, P < .05, respectively). For shoulder septic arthritis 1-month, 1-year, and 2-year reoperation rates were similar for open and arthroscopic treatment (16.0% vs 11.7%, 22.0% vs 19.3%, and 22.7% vs 20.0%, P = .57, respectively). Lastly, 6.7% of patients with native septic knee arthritis underwent subsequent arthroplasty by 2 years.

Conclusion

Arthroscopic treatment carries a lower reoperation rate than open surgery for knee septic arthritis, but in the shoulder, the risk for revision I&D is similar after arthroscopic or open surgery.

Risk factors for septic arthritis and multiple arthroscopic washouts: minimum 2-year follow-up at a major trauma centre

Background

Septic arthritis (SA) is a dangerous condition that requires emergency treatment. Managed by culture-specific antibiotics, irrigation, and debridement (I&D), some patients require repeat surgical treatment. The objectives were to determine the risk factors for SA and risk factors for repeat arthroscopic I&D in SA patients. We hypothesized that variables which directly or indirectly contributed to a larger infection burden would be associated with the development of SA and the need for repeat arthroscopic I&D.

Methods

All patients ≥ 18 years old presenting to the emergency department, orthopaedic and rheumatology clinics at our major trauma centre between January 2018 and January 2020 with a hot, swollen joint were retrospectively evaluated. Patients with previous trauma and metalwork in the affected joint, periprosthetic joint infection, previous joint arthroplasty surgery, soft tissue infection, missing data, transferred to another centre, diagnosis not concerning the joint, and < 24-month follow-up were excluded. Two hundred eleven patients were included (SA: 28; pseudogout: 32; gout: 50; others: 101). Variables of interest in the 3-month period preceding the diagnosis of SA were compared between SA and non-SA patients using univariable analysis. A multivariable logistic regression model was formed using covariates with corresponding univariable tests of p < 0.200. Similar analyses were performed to compare SA patients with multiple washouts/procedures with those with one washout/procedure.

Results

Multivariable analysis showed multiple risk factors for SA, namely rheumatoid arthritis (RA) (OR: 3.4; 95% CI: 1.2–10.0; p = 0.023); skin infection (OR: 3.3; 95% CI: 1.2–9.0; p = 0.017), liver disease (OR: 9.9; 95% CI: 2.2–43.9; p = 0.003), knee joint involvement (OR: 3.5; 95% CI: 1.3–9.4; p = 0.014), and use of immunosuppressive medication (OR: 3.5; 95% CI: 1.2–10.6; p = 0.027). Risk factors for multiple washouts included synovial WBC levels > 10.5 × 10⁹ cells/L (OR: 3.0; 95% CI: 2.3–38.8; p = 0.009) and RA (OR: 3.5; 95% CI: 1.9–66.3; p = 0.017).

Conclusions

These findings suggest that prophylactic actions against septic arthritis should be targeted at patients with liver disease, RA, or skin infection. Repeat arthroscopic I&D of septic joints may be needed, especially in patients with synovial WBC levels > 10.5 × 10⁹ cells/L and RA.

Key Points • The risk factors for septic arthritis determined in this study are rheumatoid arthritis, skin infection, liver disease, knee joint involvement, and immunosuppressant usage. • Some septic arthritis patients need multiple rounds of arthroscopic irrigation and debridement. The risk factors for this are a synovial WBC count > 10.5 × 109 cells/L and rheumatoid arthritis.

Supplementary Information

The online version contains supplementary material available at 10.1007/s10067-022-06151-w.

Arthroscopic debridement for infection after fracture fixation (IAFF) of the ankle: A case report

INTRODUCTION AND IMPORTANCE

Infection after fracture fixation (IAFF) is one of the most challenging issues for the lower-middle class socioeconomic. It is also related to unsatisfactory outcome of the treatment. Arthroscopy usually used to treat joint disease, but the evidence of arthroscopic management in IAFF is still limited.

CASE PRESENTATION

We present a case of 54-year-old female with IAFF of the ankle. An arthroscopic debridement and soft tissue release procedure were performed in this patient in one stage because the irrigation and debridement were sufficient. It showed a good result good functional outcome.

CLINICAL DISCUSSION

The aims of IAFF treatment are to eradicate the infection, promote healing of soft tissue, prevent osteomyelitis, restore the joint function, and fracture consolidation. Arthroscopy in IAFF has been found to be safe and effective. In this case, arthroscopy was done in one stage because the debridement and irrigation were sufficient while the delay of the release would result in further pain and morbidity for the patient.

CONCLUSION

Arthroscopic debridement with simultaneous release of impingement and stiffness is a novel, safe, and promising option in to eliminate both IAFF and its further complications of the ankle region.

Short- and Mid-Term Survival of Geriatric Patients with Septic Arthritis of the Knee and the Impact of Risk Factors on Survival

Septic arthritis is common in older adults and can be related to joint surgery or hematogenous distribution. To date, the risk factors affecting survival are unknown. This study aimed to evaluate the effects of existing implants, positive synovial microbiological culture results, and the American Society of Anesthesiology Physical Status (ASA) classification on the short- and mid-term survival of older patients with primary septic gonarthritis. This retrospective study included 133 older adults >60 years who underwent surgery for primary septic gonarthritis. Data were collected from medical records and public obituaries. Kaplan–Meier survival curves were used to estimate the probability of survival, as well as log-rank tests to measure and compare survival rates over one- and five-year periods. The mean age was 74.9 years (SD ± 9.2), and the 5-year follow-up rate was 74.3% (the mean follow-up was 3000.5 days; SD ± 1771.6). Mean survival was significantly different in patients with implants and without implants (p = 0.015), and between ASA II, ASA III, and ASA IV (p < 0.001). There was no significant difference in the survival of patients with or without a positive synovial microbiological culture (p = 0.08). Older adults with septic monoarthritis and pre-existing medical implants showed impaired survival. The ASA classification prior to surgery for primary septic monoarthritis can be helpful in identifying patients with poorer mid-term outcomes.

Predictors of failure after initial arthroscopic washout in septic arthritis of native knee joint- a retrospective analysis

Background

Acute septic arthritis of the knee is an orthopaedic emergency requiring prompt debridement and washout to reduce infection. However, more than one washout procedure may be required to eradicate infection. This study was performed to analyse the factors associated with the failure of a single arthroscopic washout.

Methods

This is a retrospective analysis of 78 patients with septic arthritis of the knee over 6 years from January 2015 from a single trauma centre. We analysed the variables like patient demographic factors, comorbidities, laboratory parameters and various operative and non-operative factors with regard to the outcome after a single arthroscopic washout. Statistical analysis using univariate and multivariate logistic regression analysis were performed to identify the variables associated.

Results

Out of the 78 patients who underwent arthroscopic washout for a diagnosis of septic arthritis, 31 patients (39.74%) had failure of a single arthroscopic washout, with six patients (7.69%) requiring two additional washouts and one patient (1.28%) requiring three additional washouts to eradicate infection. Statistical analysis identified high temperature at presentation (p value 0.084), BMI >45 (p value 0.025), high CRP (0.014), high neutrophil count (p value 0.113) and high creatinine (p value 0.111) as the predictors of failure of a single arthroscopic washout.

Conclusion

A high failure rate (39.74%) was seen with a single arthroscopic washout procedure. A high BMI, elevated CRP, higher temperature at presentation, elevated neutrophil count were identified as the predictors of failure of a single arthroscopic washout for septic arthritis of the knee in our study.

•

In septic arthritis of the knee, more than one arthroscopic washout may be required to eradicate infection.

•

Our study evaluated the repeated arthroscopic washout rates in hematogenous septic arthritis of native knee joint.

•

High temperature at presentation, high CRP, high BMI and high creatinine were associated with repeated infection.

Factors affecting the outcome of septic arthritis of the shoulder joint with arthroscopic management

BACKGROUND

Good results have been reported with arthroscopic therapy of septic arthritis of the shoulder; however, few studies have focused on the risk factors for failure of arthroscopic surgery. The purpose of this study was to identify the risk factors affecting the recurrence or death post-surgery in cases of septic arthritis of the shoulder.

METHODS

We retrospectively assessed the records of patients who underwent surgical treatment for septic arthritis of the shoulder between 2009 and 2019. Patients were divided into 2 groups based on complete recovery, recurrence, or death after a single arthroscopic surgery: the eradicated group and the recurred/death group. To identify risk factors for the failure of arthroscopic surgery for septic arthritis of the shoulder, the following parameters were considered: age, sex, presentation of a rotator cuff tear, the arthroscopic staging of the infection, diabetes mellitus, the causative organism, preoperative white blood cell count, and C-reactive protein level in blood. We compared two groups with respect to the presence of potential risk factors.

RESULTS

This study included 22 patients with a mean age of 67.9 years. Septic arthritis of the shoulder was eradicated completely with a single arthroscopic surgery in 17 patients (77.3%). However, failure of the surgery resulting in recurrence or death was observed in 5 patients (22.7%). No significant differences were observed in other parameters between the two groups except for the causative organism. Methicillin-resistant Staphylococcus aureus was found in 1 patient (5.9%) in the eradicated group. On the other hand, Methicillin-resistant S. aureus was found in 3 patients (60%) in the recurred/death group (p = 0.024).

CONCLUSION

Most patients with septic arthritis of the shoulder are effectively treated with a single arthroscopic surgery. This study suggests that Methicillin-resistant S. aureus as the causative organism may be the most important prognostic factor in these cases.

Efficacy and safety of arthroscopic treatment for native acute septic arthritis of the hip joint in adult patients

Background

As septic arthritis is time-dependent and has a propensity for irreversible joint damage, early diagnosis and treatment are needed. Frequently, adult patients with septic arthritis cannot undergo invasive surgery because of comorbidities and a weakened immune system. Hip arthroscopic irrigation and debridement for native acute septic arthritis of the hip joint have been performed as the first choice of treatment for patients of all ages. This study aimed to assess the efficacy and safety of arthroscopic management for native acute septic arthritis of the hip joint in adult patients.

Methods

Five adult patients (mean age, 46.2 years; all male) were retrospectively reviewed. Immediately after diagnosis, all patients underwent hip arthroscopic irrigation, debridement with synovectomy, and drainage. Partial weight-bearing was permitted once the C-reactive protein level normalised to < 1.0 mg/dl. Preoperative comorbidities, bacterial culture results, surgical complications, duration of hospital stay, time-to-confirmed normalisation of the C-reactive protein level, and recurrence incidence were evaluated.

Results

All patients had comorbidities, and the cultured microorganisms differed among cases. There were no complications related to arthroscopic surgery. All patients achieved confirmed C-reactive protein normalisation within an average of 69.8 days, and there was no recurrence during the follow-up period (mean, 40.2 months; range, 16–60 months).

Conclusion

Arthroscopic management for native acute septic arthritis of the hip joint is a safe and effective procedure in adult patients.

Autologe Chondrozytentransplantation nach penetrierender Messerstichverletzung am Kniegelenk

Die penetrierende Kniegelenkverletzung ist ein seltenes Trauma, welches jedoch nicht unterschätzt werden darf. In der Regel besteht die Indikation zur zeitnahen operativen Versorgung. Dieser Fallbericht handelt von einem 17-jährigen Patienten, der durch einen Messerstich eine Knorpelverletzung der lateralen Femurkondyle erlitt. Es folgte die Gelenkspülung mit Bergung des Knorpelflakes und endgültiger Versorgung mittels autologer Chondrozytentransplantation. Die Gewinnung von Knorpelzellen aus dem Flake unterblieb aufgrund des Risikos einer Keimbesiedlung sowie des Qualitätsverlustes der Chondrozyten.

Bacterial Septic Arthritis of the Adult Native Knee Joint: A Review

» Acute bacterial septic arthritis of the knee is an orthopaedic emergency and, if left untreated, can result in substantial joint degradation. » Important risk factors for development of septic arthritis include age of >60 years, recent bacteremia, diabetes, cancer, cirrhosis, renal disease, drug or alcohol abuse, a history of corticosteroid injection, a recent injury or surgical procedure, a prosthetic joint, and a history of rheumatoid arthritis. » The diagnosis is primarily based on history and clinical presentation of a red, warm, swollen, and painful joint with limited range of motion. Laboratory values and inflammatory markers from serum and joint fluid may serve as adjuncts when there is clinical suspicion of septic arthritis. » The initial and general antibiotic regimen should cover methicillin-resistant Staphylococcus aureus and gram-negative and gram-positive organisms. The antibiotic regimen should be specified following the culture results of the infected joint. » Operative management involves either arthrotomy or arthroscopy of the knee with thorough irrigation and debridement of all infected tissue. The Gächter classification is useful in establishing a prognosis or in determining the need for an extensive debridement.

Articulating vs Static Spacers for Native Knee Infection in the Setting of Degenerative Joint Disease

Background

Patients with advanced knee arthritis who develop a septic joint are not adequately treated with irrigation and debridement and intravenous antibiotics because of antecedent cartilage damage. The gold standard treatment has been a 2-stage approach. The periprosthetic joint infection literature has demonstrated the superiority of articulating spacers, and metal-on-poly (MOP) spacers are being used with increasing frequency. The purpose of this study was to compare the postoperative outcomes of patients with infected, arthritic knees treated by a 2-stage approach to those of patients who received single-stage treatment with a MOP spacer.

Methods

Sixteen patients with native knee septic arthritis treated with an antibiotic spacer between 1998 and 2019 were reviewed. Demographic data, clinical data, knee motion, Knee Society score, Timed-Up-and-Go, and pain scores were collected. Survivorship of final implants was compared.

Results

Six of 16 knees (38%) received single-stage treatment, and 10 received 2-stage treatment (62%). Five of 6 MOP spacers (83%) were retained at a mean follow-up of 3 ± 1.2 years. Nine of 10 (90%) receiving static spacers had subsequent reconstruction, with 9 (100%) surviving at mean follow-up of 7 ± 3.2 years. The patients who received MOP spacers trended toward greater terminal flexion, higher Knee Society score, and faster Timed-Up-and-Go at final follow-up.

Conclusion

Infection in a native, arthritic knee may be effectively treated using single-stage MOP spacer. Postoperative outcomes of single-stage MOP spacers compare favorably to staged static spacers and with those undergoing revision surgery for other indications. Longer follow-up is needed to evaluate durability of MOP spacers.

In-Hospital Complications following Arthrotomy versus Arthroscopy for Septic Knee Arthritis: A Cohort-Matched Comparison

There is a paucity of literature comparing the relative merits of open arthrotomy versus arthroscopy for the surgical treatment of septic knee arthritis. The primary goal of this study is to compare the risk of perioperative complications between these two surgical techniques. To this end, 560 patients treated for septic arthritis of the native knee with arthroscopy were statistically matched 1:1 with 560 patients treated with open arthrotomy. The outcome measures included major complications, minor complications, mortality, inpatient hospital charges, and length of stay (LOS). Major complications were defined as myocardial infarction, cardiac arrest, stroke, deep vein thrombosis, pulmonary embolism, pneumonia, postoperative shock, unplanned ventilation, deep surgical site infection, wound dehiscence, infected postoperative seroma, hospital acquired urinary tract infection, and retained surgical item. Minor complications included phlebitis and thrombophlebitis, postprocedural emphysema, minor surgical site infection, peripheral nerve complication, and intraoperative hemorrhage. Mortality data were extracted from the database using the Uniform Bill patient disposition. Complications were analyzed using univariate and multivariate logistic regression models, whereas mean costs and LOS were compared using the Kruskal-Wallis H-test. Major complications occurred in 3.8% of the patients in the arthroscopy cohort and 5.4% of the patients in the arthrotomy cohort (p = 0.20). Too few patients in our sample died to report based on National (Nationwide) Impatient Sample (NIS) minimum reporting standards. Rates of minor complications were similar for the arthroscopy and arthrotomy cohorts (12.5 vs. 13.9%; p = 0.48). Multivariate analysis did not reveal any greater risk of minor or major complication between the two procedures. Inpatient hospital cost was similar for arthroscopy (  = $15,917; standard deviation [SD] = 14,424) and arthrotomy (  = $16,020; SD = 18,665; p = 0.42). LOS was also similar for both arthrotomy (6.78 days, SD = 6.75) and arthroscopy (6.24 days, SD = 5.95; p = 0.23). Patients undergoing arthroscopic treatment of septic arthritis of the knee showed no difference in relative risk of perioperative complications, LOS, or hospital cost compared with patients who underwent open arthrotomy.

Clinical Results after Arthroscopic Treatment of Septic Shoulder with Proximal Bone Involvement

BACKGROUND

If osteomyelitis is confined to the proximal humerus, arthroscopic debridement with multiple punctures at the infected bone might be sufficient to eradicate the septic shoulder with bone involvement.

MATERIALS AND METHODS

From 2005 to 2017, 15 patients received arthroscopic debridement with multiple punctures. We included patients with septic shoulder arthritis with proximal bone involvement and excluded patients with glenohumeral joint destruction or extension of bone involvement to the diaphysis of the humerus. We performed multiple punctures for drainage of proximal humerus after complete arthroscopic debridement of septic soft tissue. Infection laboratory studies and postoperative magnetic resonance image were evaluated. For clinical outcome measurements, range of motion, pain visual analog scale, functional visual analog scale, American shoulder elbow surgeon scores, constant scores, and simple shoulder test were evaluated.

RESULTS

There were 11 males and 4 females with a mean age of 53 years (range 28-73 years). Mean follow-up was 32 months (range 12-115 months). There was no reinfection case. The postoperative C-reactive protein levels were normalized in all. The postoperative magnetic resonance image showed no bony involvement of the proximal humerus in all patients except one patient. The clinical scores and range of motion were significantly improved postoperatively. Six patients underwent secondary surgery for rotator cuff tear at a mean time period of 25 months (range 4-104 months) from the index period.

CONCLUSION

Septic shoulder with proximal bone involvement can be successfully treated with arthroscopic debridement with multiple punctures.

LEVEL OF EVIDENCE

Level IV, treatment study.

Clinical outcomes of two-stage total knee arthroplasty using articulating cement spacer in patients with infected arthritic knee: A comparison with arthroscopic surgery

BACKGROUND

The aim of this study was to compare the functional outcomes and recurrence rate of infection between patients who underwent arthroscopic surgery and two-stage total knee arthroplasty (TKA) for infected arthritic knees.

METHODS

A retrospective analysis was conducted on 52 patients (52 knees) with advanced knee joint arthritis who underwent arthroscopic surgery or two-stage TKA using articulating cement spacer (ACS) for knee joint infection between January 2009 and November 2013. Of the 52 patients (52 knees), 38 and 14 patients underwent arthroscopic surgery (AS group) and two-stage TKA using ACS (ACS-TKA group), respectively. Patient-reported outcomes (Knee Injury and Osteoarthritis Outcome Score (KOOS) and EuroQol-Visual Analog Scales (EQ-VAS)); range of motion; and recurrence rate of infection were evaluated.

RESULTS

Recurrence of infection was observed in 7/38 patients who underwent arthroscopic surgery, all of whom received two-stage TKA using ACS. Regarding the functional outcomes of the ACS-TKA group obtained before conversion to TKA and those of the AS group obtained six months after arthroscopic surgery, the former group had better outcomes for KOOS pain, KOOS activities of daily living, KOOS quality of life, and EQ-VAS. Regarding the functional outcomes of the ACS-TKA group obtained during the last follow-up and after conversion to TKA and those of the AS group who underwent TKA after arthroscopic surgery, no significant between-group differences were observed. The infection recurrence rate was higher in the AS than in the ACS-TKA group.

CONCLUSIONS

Considering infection control and functional outcomes, two-stage TKA using ACS can be an effective alternative treatment for patients with infected arthritic knees.

[Native joint infections]

Joint infections are a great challenge for the treating physicians. Infection of a native joint can result in the rapid destruction of the joint if treatment is inadequate or delayed and is associated with severe life-threatening diseases, such as sepsis. This article presents a detailed overview of the treatment of joint infections of native joints with a focus on the diagnostic approach and treatment decisions. Infections in native joints are caused either endogenously by hematogenic spreading or are caused by exogenous factors. A relevant proportion of joint infections in native joints occur in connection with iatrogenic measures, such as operations, synovial punctures and joint infiltrations. Fundamentally, acute infections represent an orthopedic surgical emergency, which is associated with the necessity for immediate operative measures. The best possible success can only be achieved by an interaction between early diagnosis, an adequate surgical approach and a tailor-made anti-infectious treatment. This is also the case with periprosthetic infections, which will be dealt with in detail in a second article.

Repeat irrigation & debridement for patients with acute septic knee arthritis: Incidence and risk factors

BACKGROUND

Septic knee arthritis is considered an orthopedic emergency due to its significant morbidity and potential to be life-threatening. One important outcome in treatment of septic knee arthritis is whether return to the operating room for repeat irrigation and debridement is required. This complication presents extra burden to the patient, as well as to the health care system. This study aims to first isolate the incidence of repeat irrigation and debridement at the authors' home institution and then define risk factors for repeat washout for septic arthritis of the knee.

METHODS

Records from all patients at a single academic institution with acute septic knee arthritis who had arthroscopic or open I&D of the knee joint from January 2005-December 2015 were collected retrospectively. Patients were initially identified on the basis of diagnosis coding in the institution's medical information system. Following collection/screening based on strict inclusion/exclusion criteria, a cohort of 63 patients was ultimately included. 18 patients were assigned to a "repeat washout" (RW) cohort and 45 patients were assigned to a "no repeat washout" (NRW) cohort. Univariate analyses and multivariable regression models were performed between the two washout cohorts to identify variables associated with repeat washout.

RESULTS

Patients requiring a repeat washout (RW) had a statistically significant association with African American/Hispanic race, higher BUN levels, higher serum white blood cell (WBC) count on admission, concurrent infection, and isolated bacteremia when compared to those patients who did not require a repeat washout (NRW) (all respective P < 0.05). Multivariable regression analysis demonstrated concurrent infection and higher synovium WBC count to increase the risk for another repeat washout. Patients who had a concurrent infection were shown to have nearly 12-fold higher odds of needing a repeat washout than those without a concurrent infection (95% CI:2.40-56.88; P = 0.0023). For every 1000 unit increase in synovium WBC count, the odds of needing a repeat washout increased by 1% in patients with concurrent infection (95% CI:1-2%; P = 0.0168).

CONCLUSION

This study retrospectively isolated risk factors associated with repeat surgical lavage. In the multivariable regression analysis, both concurrent infection and increased synovial WBC count were significantly associated with the need for repeat knee I&D. This finding is significant, as it may signify a potential for increased infectious resilience for acute septic arthritis of the knee secondary to seeding from systemic infection, thus requiring multiple I&Ds to meet resolution. This finding may carry clinical significance in the early stages of patient counseling regarding hospital course and prognosis.

LEVEL OF EVIDENCE

IV.

Medical Versus Surgical Approach to Initial Treatment in Septic Arthritis: A Single Spanish Center's 8-Year Experience

Objective

The aim of this study was to compare the functional results of 2 different procedure types, medical or surgical used in treating native joint septic arthritis.

Methods

In this cohort study, we reviewed the clinical registries of patients admitted to a single third-level hospital with the diagnosis of septic arthritis during the period of January 1, 2008, to January 31, 2016.

Results

A total of 63 cases of septic arthritis were identified in which the initial approach for 49 patients was medical (arthrocentesis), whereas the initial approach for 14 patients was surgical (arthroscopy or arthrotomy). Of the 49 patients who received initial medical treatment (IMT), 15 patients (30%) later required surgical treatment because of poor progress. The median age of the patients was 60 (SD, 18) years. The group who received IMT were older than those who received initial surgical treatment (median, 64 years [interquartile range {IQR}, 54–76 years], vs. 48 years [IQR, 30–60 years]). There was a larger percentage of male patients in the surgical group (78% vs. 42% [p = 0.018]). Thirty percent of the medical group had been receiving corticosteroid treatment (p = 0.018). Results of complete recovery of joint functionality showed no significant differences after 1 year (68% with MT vs. 67% with ST, p = 0.91). Both groups had similar symptom duration until diagnosis, duration of antibiotic therapy (median, 30 days [IQR, 28–49 days], vs. 29.5 days [IQR, 27–49] days), and mortality rate (3 in the medical group).

Conclusions

The results of the study show that initial surgical treatment in patients with native joint septic arthritis is not superior to IMT. However, half of the patients with shoulder and hip infections treated with IMT eventually required surgical intervention, suggesting that perhaps this should be the preferred initial approach in these cases.

Treatment of acute shoulder infection: can osseous lesion be a rudder in guideline for determining the method of débridement?

BACKGROUND

There is no standard to determine the most appropriate method of operation for the treatment of acute septic arthritis of the shoulder joint.

METHODS

We retrospectively reviewed 57 patients who underwent arthroscopic or open débridement for acute shoulder infection between 2001 and 2015. Arthroscopic débridement was performed in 27 patients, and open débridement in 30 patients. According to the presence of bone erosion and/or marginal erosion of cartilage of the humeral head on plain radiographs and magnetic resonance imaging (MRI) images, the cases were classified into 3 groups (group 1, n = 23, without erosions in x-ray and MRI; group 2, n = 21, erosions seen in MRI but not in x-ray; and group 3, n = 13, with erosions seen in both x-ray and MRI).

RESULTS

The arthroscopic group had a reinfection rate of 55.6% (15/27), and the open group had a reinfection rate of 16.7% (5/30). The reinfection rates in the arthroscopic and the open groups were 10% (1/10) and 15.4% (2/13) in group 1; 75% (9/12) and 11.1% (1/9) in group 2; and 100% (5/5) and 25% (2/8) in group 3, respectively. At the last follow-up, the mean University of California at Los Angeles score and the average time until normalization of white blood cell, erythrocyte sedimentation rate, and C-reactive protein in the open group showed superior results in the open group (all P < .05).

CONCLUSIONS

When preoperative MRI showed bone and/or cartilage erosion of humeral head, the reinfection rate after arthroscopic débridement was above 75%. Therefore, if preoperative MRI showed erosions, open débridement is more likely to be appropriate than arthroscopic débridement.

Arthroscopy versus arthrotomy for the treatment of septic knee arthritis

Purpose

To compare complications following arthroscopy and arthrotomy for treatment of septic knee arthritis.

Methods

Patients undergoing arthroscopy and arthrotomy for a diagnosis of septic knee arthritis were identified in National Surgical Quality Improvement Program and placed in a multivariate analysis to determine if type of surgery contributed to postoperative complications.

Results

Knee arthrotomy was associated with an increased risk for increased operative time [Parameter estimate 4.555 (95% CI:3.023-6.085); p < 0.0001], minor morbid events [OR 2.064 (95% CI: 1.447-2.943); p < 0.0001], and any morbidity [OR 2.285 (95% CI:1.527-3.419); p < 0.0001].

Conclusions

Knee arthrotomy was associated with a higher risk of complications.

A Case Report of Pneumococcal Septic Arthritis Following a Respiratory and Gastrointestinal Prodrome with Accompanying Literature Review

We report an uncommon case of septic arthritis of the ankle from a Streptococcus pneumoniae infection and provide an update of the literature reported since 2002. A 58-year-old female presented to the hospital with right ankle pain and an inability to bear weight. She reported a history of productive cough, vomiting, diarrhea, and subjective fevers 4 days earlier. Streptococcus pneumonia was identified in her ankle aspirate, and she was treated urgently with operative incision and debridement, followed by postoperative intravenous antibiotics. At her 7-week follow-up, she demonstrated complete resolution of symptoms and near-complete recovery of range of motion. This case demonstrates the importance of early identification, as the majority of patients recover fully with prompt treatment. The literature review included 44 cases of pneumococcal septic arthritis and found that the knee was the most commonly affected joint, followed by the shoulder and ankle. Blood cultures were positive for S. pneumoniae in 27 of 38 adults (71%) and 4 of 6 children (67%). Comorbid conditions were present in 32 of 38 adults (84%) and 4 of 7 children (57%), the most frequent of which were alcoholism and osteoarthritis in adults and malignancy or immunosuppression in children. Additionally, roughly half of included adults had an extra-articular focus of pneumococcal disease, most frequently pneumonia. Operative treatment was undertaken in 32 of 38 adults (84%) and all 7 children. Of adults with data available, 24 of 33 (73%) recovered with complete joint function, compared with 5 of 7 children (71%).

Arthroscopic irrigation and debridement is associated with favourable short-term outcomes vs. open management: an ACS-NSQIP database analysis

PURPOSE

Septic arthritis of the knee is an orthopaedic emergency that is associated with marked morbidity and can potentially be life threatening. Surgical debridement can be performed either arthroscopically or via an arthrotomy. The aim of this study was to compare the 30-day complications and adverse outcomes between the two procedures.

METHODS

Patients with a diagnosis of septic arthritis of the knee between 2011 and 2015 were identified using the ACS-NSQIP database. The study population included 695 patients, who had knee septic arthritis and underwent either an arthroscopic irrigation or debridement (I&D) (n = 464) or open irrigation and debridement (n = 231). Preoperative data included demographics, independent functional status, and comorbidities. Outcomes of interest included wound complications, infectious complications, cardiovascular events, hospital readmissions, and reoperations, or any of the previous adverse events.

RESULTS

Both cohorts were similar in most baseline characteristics. Bleeding requiring transfusion was significantly lower in the arthroscopic (n = 13; 3.6%) compared to the open procedure (n = 31; 13.4%; p = 0.0001). Home discharge was significantly higher in the arthroscopic irrigation and debridement group (n = 310; 67.5%) compared to the open group (n = 126; 55%; p = 0.0013). The overall incidence of adverse events was lower in the arthroscopic group (n = 158; 34%) compared to the open group (n = 112; 49%; p = 0.0002). There was no difference in rates of infectious complications, thromboembolic events, hospital readmission, reoperation, or mortality between the groups. Open irrigation and debridement was associated with higher risk of bleeding requiring transfusion (OR = 3.79; 95% CI: 2.02-7.13; p = 0.0001), higher risk of incidence of adverse events (OR = 1.46; 95% CI: 1.02-2.08; p = 0.039), and lower home discharge (OR = 3.79; 95% CI: 2.02-7.13; p = 0.0001) within 30 days after the procedure.

CONCLUSION

Arthroscopic irrigation and debridement demonstrated favourable short-term outcomes. Patients who underwent arthroscopic irrigation and debridement had lower rates of blood transfusions, lower rates of adverse events, and higher home discharge rates compared to open irrigation and debridement. This study is the largest analysis comparing arthroscopic vs. open irrigation and debridement in a national database sample. These findings conclude that arthroscopic debridement can be an alternative first-line option in managing septic arthritis.

LEVEL OF EVIDENCE

III.

Impact of setting up a bone and joint infection referral center on arthroscopic treatment of septic arthritis of the knee and shoulder: Retrospective study

INTRODUCTION

Referral Centers for Bone and Joint Infection (BJI) were set up to optimize BJI management thanks to multidisciplinary teamwork. The main aim of the present study was to assess the impact of setting up the Western France Bone and Joint Infection Referral Center on arthroscopic treatment of septic arthritis of the shoulder and knee. The secondary aim was to identify other risk factors for failure of this treatment. The null hypothesis was that there was no difference between the "success group" and the "failure group".

MATERIAL AND METHODS

This single-center retrospective study included 52 patients treated for septic arthritis between January 1, 2000 and December 31, 2013 by arthroscopic joint lavage associated to at least 4 weeks' antibiotic therapy. Exclusion criteria comprised: retrospective diagnosis of rheumatoid arthritis after negative bacteriological analysis, early cessation of antibiotic treatment, and follow-up less than 4 weeks. Failure was defined as non-healing after first-line treatment. The primary endpoint was date of treatment compared to the launch date of the Center in the first quarter of 2010. The influence of pre- and intraoperative criteria related to patient, treatment and microorganism was assessed.

RESULTS

At follow-up, 17 patients (32.9%) showed failure of first-line treatment and 5 (9.6%) were non-healed at end of treatment, whatever the re-intervention. The failure rate significantly decreased after setting up the Center, from 42.9% to 11.8% (p=0.03). In the failure group, 70.6% of patients showed immunosuppression, versus 37.2% in the success group (p=0.01). Neither time to surgery (p=1), type of microorganism, or performance of antiseptic lavage (p=0.25) or synovectomy (p=0.62) influenced outcome.

CONCLUSION

Multidisciplinary management of septic arthritis improved treatment success.

LEVEL OF EVIDENCE

III, Retrospective comparative study.

Arthroscopic debridement for septic arthritis of the shoulder joint: post-infectious arthritis is an inevitable consequence?

PURPOSE

The purpose of this study was to compare clinical outcomes and development of post-infectious arthritis of the shoulder joint after single (Group S) or repeated (Group R) arthroscopic debridement surgeries. We hypothesized that (1) repeated surgeries might be attributable to initial subchondral involvement resulting from septic arthritis and (2) the repeated surgery group would exhibit a higher incidence of post-infectious arthritic changes and inferior clinical outcomes due to prolonged resolution of the infection.

METHODS

This study included 42 patients (single surgery, n = 29; repeated surgery, n = 13) who underwent arthroscopic debridement for septic arthritis and had a minimum of 2 years of postoperative follow-up data. All patients underwent preoperative magnetic resonance imaging (MRI) with gadolinium enhancement to evaluate subchondral bone involvement suspicious for osteomyelitis secondary to septic arthritis and extension of infection around the glenohumeral joint. Functional and radiological outcomes were assessed.

RESULTS

Group S experienced a shorter duration (25.4 days) of infection than Group R (39.7 days) (p = 0.002). Increased signal intensity in the subchondral bone on preoperative MRI was identified in 9 patients (31%) in Group S and 5 patients (38%) in Group R. Post-infectious arthritic changes developed in 6 (21%) and 5 (38%) in Groups S and R, respectively. However, there were no significant differences between groups. At the final follow-up, there were no significant differences in functional assessments.

CONCLUSION

Despite a prolonged period of infection in the repeated surgery group, there was no significant difference in development of post-infectious arthritic changes or clinical outcomes in patients requiring single or repeated surgeries.

LEVEL OF EVIDENCE

Retrospective comparative study, III.

Surgical treatment of shoulder infections: a comparison between arthroscopy and arthrotomy

BACKGROUND

Management of bacterial shoulder infections includes antibiotic therapy and surgical joint decompression. Arthroscopy and open arthrotomy are recommended treatment options. Whether 1 of the 2 surgical options is superior remains unclear. The present study aimed (1) to compare the reinfection rates after arthroscopy and open arthrotomy and (2) to identify risk factors of reinfection after surgical intervention.

MATERIALS AND METHODS

The data of 59 consecutive patients were available for final analysis. All patients received arthroscopy or open arthrotomy at our institution between 2001 and 2015. The reinfection rates between the 2 distinct interventions were compared. We also evaluated the influence of potential confounders, such as age, sex, comorbidities, microbiological findings, duration of symptoms, osteoarthritis, Gächter score, and preoperative inflammatory parameters, on the recurrence of infections and compared the functional outcome between the 2 surgery groups.

RESULTS

From 59 included patients, 38 (64.4%) underwent open arthrotomy, and 21 (35.6%) were treated arthroscopically. Reinfection was documented in 18 patients (30.5%). The reinfection rate was significantly higher in arthroscopically treated patients (11 [52.4%]) than in patients who underwent open arthrotomy (7 [18.4%]; P = .007). An infection with Staphylococcus aureus negatively influenced the treatment success (P = .034).

CONCLUSION

According to our data, open arthrotomy is the more effective treatment method in septic arthritis of the shoulder, with lower reinfection rates and a comparable functional outcome. Furthermore, we could identify Staphylococcus aureus as an independent risk factor for the recurrence of infections.

Complete Arthroscopic Synovectomy in Management of Recalcitrant Septic Arthritis of the Knee Joint

Septic arthritis of the knee is a potentially life-threatening condition and can be associated with many late complications. The key of success of management of septic arthritis of the knee joint is early aggressive treatment of surgical debridement and decompression and antibiotic therapy. In adults, arthroscopic drainage with synovectomy is the treatment of choice in septic arthritis of the knee, with lower rates of infectious recurrence than needle aspiration and better functional results than open surgery. Repeated arthroscopic debridement and drainage is needed in case of delayed treatment with an advanced arthroscopic stage of the infection, early unfavorable course, or multiresistant germ. In these situations, synovectomy should be as complete as possible to maximize the reduction of the bacterial burden and avoid the need of further debridement. The purpose of this Technical Note is to describe the details of complete arthroscopic synovectomy of the knee joint. This includes 2 circles of circumferential synovectomy. One circle is in the axial plane and includes the intercondylar notch, anterior, posterior, medial, and lateral compartments. The other circle is in the coronal plane and includes the supra-patellar pouch, medial and lateral recesses, and the anterior compartment.

Open Compared with Arthroscopic Treatment of Acute Septic Arthritis of the Native Knee

BACKGROUND

Acute native knee septic arthritis is a joint-threatening emergency. Operative treatments by open or arthroscopic methods are available to surgeons. To our knowledge, the literature to date has primarily consisted of case series and no large study has yet compared these methods. The aim of this study was to compare open and arthroscopic treatment for acute native knee septic arthritis.

METHODS

All adult patients with acute native knee septic arthritis treated at our institution with either open or arthroscopic irrigation from 2000 to 2015 were retrospectively evaluated. The clinical findings, laboratory evidence, arthrocentesis and microbiology results, knee radiographs, and outcomes were compared.

RESULTS

There were 161 patients (166 knees) with acute native knee septic arthritis treated between 2000 and 2015. Initially, 123 knees were treated by arthroscopic irrigation and 43 knees were treated by open irrigation; however, 71% in the open treatment group required repeat irrigation compared with 50% in the arthroscopic treatment group. The superiority of an arthroscopic procedure persisted after adjustment for potential confounders by multivariable analysis, with an odds ratio of 2.56 (95% confidence interval, 1.1 to 5.9; p = 0.027). After 3 irrigation procedures, the cumulative success rate was 97% in the arthroscopic treatment group and 83% in the open treatment group (p = 0.011). The total number of irrigation procedures required was fewer in the arthroscopic treatment group (p = 0.010). In the arthroscopic treatment group, the mean postoperative range of motion was greater (p = 0.016) and there was a trend toward a shorter median length of stay (p = 0.088).

CONCLUSIONS

Arthroscopic treatment for acute native knee septic arthritis was a more successful index procedure and required fewer total irrigation procedures compared with open treatment. Long-term postoperative range of motion was significantly greater following arthroscopic treatment.

LEVEL OF EVIDENCE

Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Arthroscopic Treatment for Primary Septic Arthritis of the Hip in Adults

Purpose. Primary septic arthritis is a rare differential diagnosis of acute hip pain in adults. Inspired by the success of all-arthroscopic treatment in pediatric patients, we developed a diagnostic and surgical pathway for our adult patients. Methods. Seven patients, average age 44 ± 13.7 years with acute hip pain since 4.4 ± 2.9 days in the average, were included. Septic arthritis was confirmed by joint aspiration and dissemination was excluded by MRI and standard radiographs. Surgical treatment consisted of immediate arthroscopic lavage using 4 portals for debridement, high-volume irrigation, partial synovectomy, and drainage. Results. Patients were treated in hospital for 12.4 ± 3.1 days (range 7-16 days). WBC and CRP returned to physiological levels. During the mean follow-up of 26.4 ± 19.4 months (range 13-66 months) no patient showed recurrence of infection. The 5 patients with an unimpaired hip joint prior to the infection had a mean modified Harris Hip Score of 94 ± 5.6 points (range 91-100) at final follow-up. Conclusions. Arthroscopic therapy using a minimally invasive approach with low perioperative morbidity for the treatment of primary septic arthritis of the adult hip is able to restore normal hip function in acute cases without dissemination of the infection. Level of Evidence. IV.

Treatment of septic arthritis of the knee: a comparison between arthroscopy and arthrotomy

PURPOSE

The aim of this study was to compare the efficacy of arthroscopy and arthrotomy in patients with septic monarthritis of the knee.

METHODS

Seventy consecutive patients who underwent surgery because of a bacterial monarthritis were evaluated. Patients were either treated with arthroscopy or with arthrotomy. Our primary outcome was the early recurrence of infection (>3 months after surgery), which made a second surgical procedure necessary. Furthermore, the influence of potential confounders on treatment outcome was analysed.

RESULTS

Of the 70 patients, 41 were treated arthroscopically and 29 with arthrotomy. Eight patients (11.4 %) had to undergo a second surgical procedure because of early re-infection. The rate was significantly higher in patients treated with arthrotomy (n = 6; 20.7 %) compared with those treated by arthroscopy (n = 2) (p = 0.041). Range of motion was significantly better in patients who underwent arthroscopy (p < 0.001). Male sex had negative influence on the treatment success (p = 0.03).

CONCLUSIONS

Patients with bacterial monarthritis of the knee who were treated with arthroscopy had a significantly lower re-infection rate and a better functional outcome than those treated with arthrotomy. As arthroscopy is the less invasive method, it should be considered the routine treatment, according to our data.

LEVEL OF EVIDENCE

Therapeutic study, Level III.

Post-arthroscopy septic arthritis: Current data and practical recommendations

Septic arthritis develops after less than 1% of all arthroscopy procedures. The clinical symptoms may resemble those seen after uncomplicated arthroscopy, raising diagnostic challenges. The diagnosis rests on emergent joint aspiration with microscopic smear examination and prolonged culturing on specific media. Urgent therapeutic measures must be taken, including abundant arthroscopic lavage, synovectomy, and the concomitant administration of two effective antibiotics for at least 6 weeks. Preservation of implants or transplants is increasingly accepted, and repeated joint lavage is a component of the treatment strategy. After knee arthroscopy, infection is the most common complication; most cases occur after cruciate ligament reconstruction, and staphylococci are the predominant causative organisms. Emergent synovectomy with transplant preservation and appropriate antibiotic therapy ensures eradication of the infection in 85% of cases, with no adverse effect on final functional outcomes. After shoulder arthroscopy, infection is 10 times less common than neurological complications and occurs mainly after rotator cuff repair procedures; the diagnosis may be difficult and delayed if Propionibacterium acnes is the causative organism. The update presented here is based on both a literature review and a practice survey. The findings have been used to develop practical recommendations aimed at improving the management of post-arthroscopy infections, which are exceedingly rare but can induce devastating functional impairments.