Bidirectional Expandable Technology for Transforaminal or Posterior Lumbar Interbody Fusion: A Retrospective Analysis of Safety and Performance.

BACKGROUND: Expandable devices for transforaminal or posterior lumbar interbody fusion (TLIF and PLIF, respectively) may enable greater restoration of disc height, foraminal height, and stability within the interbody space than static spacers. Medial-lateral expansion may also increase stability and resistance to subsidence. This study evaluates the clinical and radiographic outcomes from early experience with a bidirectional expandable device. METHODS: This was a retrospective analysis of a continuous series of patients across 3 sites who had previously undergone TLIF or PLIF surgery with a bidirectional expandable interbody fusion device (FlareHawk, Integrity Implants, Inc) at 1 or 2 contiguous levels between L2 and S1. Outcomes included the Oswestry Disability Index (ODI), a visual analog scale (VAS) for back pain or leg pain, radiographic fusion by 1 year of follow-up, subsidence, device migration, and adverse events (AE). RESULTS: There were 58 eligible patients with radiographs for 1-year fusion assessments and 45 patients with ODI, VAS back pain, or VAS leg pain data at baseline and a mean follow-up of 4.5 months. The ODI, VAS back pain, and VAS leg pain scores improved significantly from baseline to final follow-up, with mean improvements of 14.6 ± 19.1, 3.4 ± 2.6, and 3.9 ± 3.4 points (P < .001 for each), respectively. In addition, 58% of patients achieved clinically significant improvements in ODI, 76% in VAS back pain, and 71% in VAS leg pain. By 1 year, 96.6% of patients and 97.4% of levels were considered fused. There were zero cases of device subsidence and 1 case of device migration (1.7%). There were zero device-related AEs, 1 intraoperative dural tear, and 3 subsequent surgical interventions. CONCLUSIONS: The fusion rate, improvements in patient-reported outcomes, and the AEs observed are consistent with those of other devices. The bidirectional expansion mechanism may provide other important clinical value, but further studies will be required to elucidate the unique advantages. LEVEL OF EVIDENCE: 4.

Marked variation in newborn resuscitation practice: a national survey in the UK.

BACKGROUND: Although international newborn resuscitation guidance has been in force for some time, there are no UK data on current newborn resuscitation practices. OBJECTIVE: Establish delivery room (DR) resuscitation practices in the UK, and identify any differences between neonatal intensive care units (NICU), and other local neonatal services. METHODS: We conducted a structured two-stage survey of DR management, among UK neonatal units during 2009-2010 (n=192). Differences between NICU services (tertiary level) and other local neonatal services (non-tertiary) were analysed using Fisher's exact and Student's t-tests. RESULTS: There was an 89% response rate (n=171). More tertiary NICUs institute DR CPAP than non-tertiary units (43% vs. 16%, P=0.0001) though there was no significant difference in frequency of elective intubation and surfactant administration for preterm babies. More tertiary units commence DR resuscitation in air (62% vs. 29%, P<0.0001) and fewer in 100% oxygen (11% vs. 41%, P<0.0001). Resuscitation of preterm babies in particular, commences with air in 56% of tertiary units. Significantly more tertiary units use DR pulse oximeters (58% vs. 29%, P<0.01) and titrate oxygen based on saturations. Almost all services use occlusive wrapping to maintain temperature for preterm infants. CONCLUSIONS: In the UK, there are many areas of good evidence based DR practice. However, there is marked variation in management, including between units of different designation, suggesting a need to review practice to fulfil new resuscitation guidance, which will have training and resource implications.

Treatment failure, recurrence, and antibiotic prescription rates for different acute otitis media treatment methods.

In an era of increasing antibiotic resistance, reliance on empirical antibiotic therapy for management of acute otitis media (AOM) will eventually become an untenable strategy. New research efforts are needed to identify effective treatment alternatives. In this retrospective analysis, we assessed AOM treatment failure (AOMTF), recurrent AOM (RAOM), and antibiotic prescription rates for groups of AOM episodes managed with either immediate antibiotics (ABX), tympanocentesis + observation (Tap + OBS), or tympanocentesis + immediate antibiotics (Tap + ABX). No significant differences in rates of AOMTF or RAOM were observed between any of the treatment groups. The 30-day rate of antibiotic prescriptions written for AOM was significantly lower in the TAP + OBS group (1 prescription per 3.8 episodes) than in the immediate antibiotic therapy groups (1.2 prescriptions per episode), P < .001. The comparative risk of AOMTF was slightly higher among AOM episodes caused by Streptococcus pneumoniae (OR 2.523; CI 1.070-5.944; P = 0.056). Neither the presence of other particular otopathogens, nor the presence of drug-resistant otopathogens, nor the choice of any particular AOM antibiotic therapy correlated with increased risk of either AOMTF or RAOM. The observed absence of significant differences in clinical outcomes between the various treatment groups in this study is consistent with findings published by other authors: alternative AOM therapies can help reduce reliance on antibiotics without inviting significant increases in rates of clinical failure.

Microbiology of acute otitis media, Puget Sound region, 2005-2009.

This review of electronic patient records was conducted to identify trends in acute otitis media (AOM) microbiology in the Puget Sound region. Culture results from tympanocentesis procedures performed between July 1, 2005 and June 30, 2009 were compiled into 4 respiratory disease seasons: 2005-2006, 2006-2007, 2007-2008, 2008-2009. Heptavalent pneumococcal conjugate vaccination coverage within the cohort was 85%; average patient age was 13 months (SD = 6.6). The proportion of AOM isolates positive for Streptococcus pneumoniae for the four periods covered was 48%, 41%, 35%, and 54%, respectively (P = 0.185, 3rd to 4th season). For Haemophilus influenzae, the proportions were 42%, 41%, 59%, and 38%, respectively (P = 0.182, 3rd to 4th season). Penicillin resistance among S pneumoniae isolates increased from 13% to 61% across the study period (P = 0.016). S pneumoniae may be regaining prevalence as an otopathogen in PCV7-vaccinated populations, and levels of penicillin resistance are increasing.

Vertebra plana caused by primary Ewing sarcoma: case report and review of the literature.

A 7-year-old boy presented with vertebra plana of T11. The presumptive diagnosis suggested by clinical presentation, conventional radiographs, and computed tomographic scans was eosinophilic granuloma. Progressive neurologic symptoms required surgical excision of the lesion and decompression. Histopathologic examination of the surgical specimen confirmed the diagnosis of Ewing sarcoma.