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e patients of the potential complications that may occur following their procedure.STUDY DESIGN Retrospective review of the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database years 2012-2015. OBJECTIVE Compare the 30-day readmission and postoperative major complications rates of 2-level lumbar decompression performed in the ambulatory and the inpatient settings. SUMMARY OF BACKGROUND DATA In recent years, there is an increasing trend toward ambulatory spine surgery. However, there remains a concern regarding risks of readmission and postoperative morbidity after discharge. METHODS The ACS-NSQIP database from 2012 to 2015 was queried for adult patients who underwent elective 2-level lumbar decompression (CPT code 63047 accompanied with code 63048). A cohort of ambulatory lumbar decompression cases was matched 11 with an inpatient cohort after controlling for patient demographics, comorbidities, and complexity of the procedure. The primary outcome was the 30-day readmission rate. Secondary outcomes included a composite of 30-day postoperative major complications and hospital length of stay for hospitalized patients. RESULTS A total of 7505 patients met our study criteria. The ambulatory 2-level lumbar decompression surgery rate increased significantly over the study period from 28% in 2012 to 49% in 2015 (P less then 0.001). In the matched sample, there was no statistically significant difference in the 30-day readmission rate (odds ratio, 0.82; 95% confidence interval, 0.64-1.04; P=0.097) between the two cohorts; however, the ambulatory cohort had a lower 30-day postoperative major complication rate (odds ratio, 0.55; 95% confidence interval, 0.38-0.79; P=0.002). CONCLUSIONS After 2-level lumbar decompression performed on inpatient versus outpatient basis, the 30-day readmission rate is similar. However, the 30-day postoperative complication rate is significantly lower in the ambulatory setting. The reasons for these differences need further exploration. LEVEL OF EVIDENCE Level III.STUDY DESIGN Retrospective radiographic study. OBJECTIVE The aim of this study was to compare disks with and without high-intensity zones (HIZ) to understand the impact of an HIZ on the stability of corresponding lumbar spinal segments. SUMMARY OF BACKGROUND DATA Previous studies have established a relationship between back pain and the presence of HIZ on T2-weighted images of magnetic resonance imaging. SU1498 manufacturer These previous studies, however, used either plain radiographs or static (neutral position) magnetic resonance imaging to assess their chosen variables. MATERIALS AND METHODS We retrospectively reviewed 140 consecutive patients with MR images taken in weight-bearing neutral, flexion, and extension positions. We separated segments into those with HIZ and without HIZ and assessed the grade of disk degeneration for each segment. Subsequently, a matched control group was selected from the segments without HIZ. Multiple factors were compared in a univariate analysis. A multinomial logistic regression analysis was associated with significant changes in several quantitative measurements of spine pathology.STUDY DESIGN A propensity score-matched cohort study. OBJECTIVE The objective of this study was to compare the radiologic and clinical outcomes of camptocormia in Parkinson disease (PD) with degenerative sagittal imbalance (DSI) patients. SUMMARY OF BACKGROUND DATA Camptocormia in PD and DSI could be characterized by a dynamic deformity. However, no study has directly evaluated the outcomes of patients with camptocormia and DSI. METHODS Thirteen consecutive PD patients undergoing surgical correction for camptocormia were matched in a 1-to-2 format with 26 patients in the DSI group by propensity score-matching. Radiologic outcomes, including paravertebral muscle changes, and clinical outcomes were compared between the 2 groups. The rate of proximal junctional problems and reoperations were assessed. RESULTS PD patients with camptocormia had significantly greater preoperative coronal and sagittal malalignments (29.9 vs. 16.9 mm, P=0.019; 142.8 vs. 64.4 mm, P=0.0001, respectively) and weakness of paravertebral muscles compared with the DSI patients. Regarding the clinical outcomes, reoperations were significantly higher in the camptocormia group, compared with the DSI group (53.8% vs. 7.7%, P=0.001). Moreover, proximal junctional failure was developed in 8 patients in the camptocormia group, while 1 patient in the DSI group (61.5% vs. 3.8%, P=0.0001). In subgroup analysis, independent risk factors for the proximal junctional failure were the total fusion levels (hazard ratio=0.26, P=0.018) and the degree of fatty changes of the paravertebral muscles (hazard ratio=1.15, P=0.048). CONCLUSIONS PD patients undergoing spinal surgery for camptocormia had global malalignment and higher rates of complications compared with DSI patients. Patients should be appropriately counseled regarding the increased risk of operative complications and closely followed for incipient failure.PURPOSE To report a case of Propionibacterium acnes endophthalmitis in a patient with a Baerveldt glaucoma implant. PATIENT AND METHOD An 8-year-old boy presented with left eye pain, extreme photophobia, and acute anterior uveitis > 6 months after Baerveldt glaucoma implantation. A diagnosis of P. acnes endophthalmitis was made after positive culture of the explanted Baerveldt device. RESULTS Initially, the patient was treated with intravitreal vancomycin and ceftazidime which led to mild early clinical improvement followed by deterioration of findings with recurrence of fibrin at the Baerveldt tube ostium within the anterior chamber. Repeat intravitreal injections were given to include antifungal coverage, along with intracameral moxifloxacin and subconjunctival vancomycin around the Baerveldt reservoir. Symptoms and findings again recurred, ultimately leading to the decision for complete removal of the glaucoma implant along with irrigation of the scleral bed with moxifloxacin. P. acnes was cultured from the extracted implant. The endophthalmitis resolved completely after implant removal. CONCLUSIONS Despite introduction of antibiotics into the intravitreal, intracameral, and subconjunctival space surrounding the Baerveldt implant, infection persisted until complete explantation of the device. Early explantation should be considered in glaucoma drainage device endophthamitis secondary to P. acnes.
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