Knee Arthritis in Children: When Can It Be Safely Treated With Needle Joint Aspiration? A Large Children's Tertiary Hospital Study.

BACKGROUND: Early joint decompression associated to antibiotic therapy is the most important procedure to reduce joint damage in septic knee arthritis in children. Several joint decompression methods have been described such as arthrotomy with open debriding, arthroscopic drainage or needle joint aspiration. The aim of the present study was to determinate which patients with acute septic knee arthritis could be safely treated with needle joint aspiration. METHODS: Patients with an acute knee arthritis diagnosed between September 2003 and December 2013 in our children's tertiary hospital were retrospective review. All cases were initially treated with needle joint aspiration. Primary end-point was failure of joint aspiration. RESULTS: A total of 74 patients were included in the study. Forty-two (56.8%) were male and median age was 1.49 years. Mean delay between onset of symptoms and diagnosis was 3.6 days and in 25 (33.8%) cases patients needed more than 1 visit to the emergency room. Median C-reactive protein (CRP) value was 36.3 mg/L and was >20 mg/L in 59 (79.7%) cases. A total of 11 (14.9%) patients showed failure of the joint aspiration treatment between 3 and 21 days after initial joint aspiration. The stepwise forward logistic regression model only identified as independent predictor of joint aspiration failure an age older than 3 years old (odds ratio, 5.64; 95% confidence interval, 1.38-29.61; P=0.018). Joint aspiration did not fail in any patient younger than 12 months and neither in any patient younger than 3 years old with CRP value <20 mg/L. Otherwise, treatment failed in 38% of patients older than 3 years and in 16% of patients between 1 and 3 years with a CRP>20 mg/L. CONCLUSIONS: Septic knee arthritis treated with needle joint aspiration succeed in all patients younger than 1 year and in all patients between 1 and 3 years with a CRP<20 mg/L. Alternative treatment such as arthroscopy debridement should be early considered in patients older than 3 years and patients between 1 and 3 years with CRP>20 mg/L. LEVEL OF EVIDENCE: Level III.

Vascularized ulnar periosteal pedicled flap for forearm reconstruction: Anatomical study and a case report.

PURPOSE: Through an anatomical review, the aim of this study is to define the ulnar periosteal branches of the posterior interosseous vessels (PIV). In addition, we report the clinical utility of a vascularized ulnar periosteal pedicled flap (VUPPF), supplied by the investigated PIV, in a complex case of radial nonunion. METHODS: Ten upper limbs latex colored from fresh human cadavers were used. Branches of the PIV were dissected under 2.5× loupe magnification, noting the periosteal, muscular, and cutaneous branches arising distal to the interosseous recurrent artery. The VUPPF was measured in length (cm) and width (cm). RESULTS: The PIV provided a mean 12.8 periosteal branches to the ulna distributed along the most distal 15 cm, with a mean distance between branches of 1 cm, allowing for the design of a VUPPF which measured a mean 12 cm in length and 1.7 cm in width. We used a VUPPF of 7.8 cm in length and 2 cm in width to treat extensive nonvascularized bone graft nonunion with a defect of 2 cm of the left radius in a 6-year-old girl, secondary to previous Ewing's Sarcoma reconstruction. Successfully consolidation was achieved 6-months after surgery. The patient did not present postoperative complications. At 2-years of follow-up after surgery, active supination was 80° and pronation 0° (due an incomplete interosseous ossification); grip strength was 80% that of the opposite hand. The patient had resumed all her daily activities. CONCLUSIONS: VUPPF may be considered a valuable and reliable surgical option for forearm reconstruction in complex clinical scenarios.

Comparison of cannulated screws versus compression staples for subtalar arthrodesis fixation.

BACKGROUND: Different fixation techniques have been described in the literature for isolated subtalar arthrodesis (ISA). The purpose of this study was to compare the fusion rate and clinical outcome of ISA using cannulated compression screws or compression staples. METHODS: Thirty-three patients (33 feet) underwent ISA using screw (17 feet) or staples (16 feet) fixation. Patients were followed for 42.7 ± 16.4 months (range, 24.5-84.3 months). The subtalar fusion was assessed radiographically and clinically. Clinical outcome measures included the visual analog scale (VAS) for pain and American Orthopaedic Foot and Ankle Society (AOFAS) hindfoot score. RESULTS: The average pain score decreased significantly from 6.4 ± 1.1 (range, 5-9) to 0.8 ± 1.3 (range, 0-4) (P < .001). In the screws group, the average AOFAS hindfoot score increased significantly from 54.6 ± 8.8 (range, 37-67) preoperatively to 86.1 ± 7.1 (range, 71-91) postoperatively (P < .001). In the staples group, the average AOFAS hindfoot score increased significantly from 53.4 ± 11.1 (range, 33-69) preoperatively to 83.4 ± 6.9 (range, 71-91) postoperatively (P < .001). The AOFAS hindfoot score was comparable in both groups (P = .149). Only the AOFAS hindfoot score function subgroup in the screw fixation was significantly higher than in the staples fixation group (P = .005). There were 4 cases of nonunion at the site of subtalar arthrodesis (2 from screws group, 2 from staples group). The complication rate was comparable in both groups. CONCLUSION: The fusion rate was comparable in both groups, while the postoperative functional outcome was significantly better in the screw fixation group. LEVEL OF EVIDENCE: Level III, retrospective comparative cohort study.

Reduced patellofemoral and walking pain with mobile-bearing vs. fixed-bearing total knee replacements: a mid-term prospective analytic study.

OBJECTIVE: Total knee replacement (TKR) is the standard treatment for advanced stage knee osteoarthritis. The introduction of the mobile-bearing (MB) design has given rise to a series of theoretical advantages compared to fixed-bearing (FB) implants, although current literature does not reveal significant differences between the designs. The aim of this study was to estimate the clinical results of 2 cemented total knee prosthetic designs: an MB and an FB design. METHODS: A series of patients with similar clinical and radiographic characteristics were treated consecutively with 100 FB followed by 94 MB implants. Patients were evaluated radiographically and clinically. RESULTS: Statistically significant differences were found in terms of pain at 5 years in favor of MB prostheses (p=0.006). The "pain on ascending/descending stairs" category on the KSS score showed improvement at 5 years for the MB design (p=0.003). MB implants showed better results in terms of ability to ascend/descend stairs at five years (p=0.002). With regards to the patients' ability to walk, there were differences at 1 year (p=0.020) and at 5 years (p=0.021) in favor of MB implants. CONCLUSION: At a mean follow-up of 5 years, significant differences were observed in the MB prosthesis in terms of postoperative pain, ability to ascend/descend stairs, and patellofemoral pain.

Osteochondromas around the ankle: Report of a case and literature review.

INTRODUCTION: An osteochondroma or exostosis is a benign bone tumour consisting of a bony outgrowth covered by a cartilage cap that occurs commonly in the metaphysis of long bones, mainly the distal femur, proximal tibia and proximal humerus. PRESENTATION OF CASE: We describe an unusual case of a distal tibia osteochondroma affecting the lateral malleolus of a young girl. DISCUSSION: Most osteochondromas are asymptomatic and seen incidentally during radiographic examination. Osteochondromas are rarely localized in the foot and ankle. CONCLUSION: Although most of the osteochondromas in children should be treated conservatively until skeletal maturity, those affecting the distal tibia or fibula should be treated with surgical excision in order to prevent ankle deformity, syndesmotic lesions or even fracture due to the expanding nature of this benign tumour.