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We previously reported that intracerebroventricularly (ICV) injected arachidonic acid (AA) could produce pressor and bradycardic responses on the cardiovascular system and hyperventilation effect on the respiratory system by activating cyclooxygenase (COX). We also demonstrated that centrally injected AA-induced cardiovascular and respiratory responses were mediated by COX-metabolites, such as thromboxane A2 (TXA2), prostaglandin (PG) D, PGE, and PGF2α. Brain tissue is also able to express the lipoxygenase (LOX) enzyme and LOX-induced AA-metabolites. The current study was designed to investigate the possible mediation of the central LOX pathway in AA-induced cardiorespiratory effects in anesthetized rats. Central pretreatment with different doses of a non-selective LOX inhibitor, nordihydroguaiaretic acid (NDGA) (500 and 1000 μg; ICV) partially blocked the AA (0.5 μmol; ICV)-evoked pressor and bradycardic cardiovascular responses in male anesthetized Sprague Dawley rats. Pretreatment with different doses of NDGA (500 and 1000 μg; ICV) also reduced AA-induced hyperventilation responses, with an increase in tidal volume, respiratory rate and minute ventilation, in the rats. Moreover, AA-induced increasing pO2 and decreasing pCO2 responses were diminished by central NDGA pretreatment. In summary, our findings show that the central LOX pathway might mediate, at least in part, centrally administered AA-evoked cardiorespiratory and blood gases responses. STUDY OBJECTIVES To assess emergent changes in the age at menarche and investigate associated factors in Israeli adolescents in 2003 and 2016. DESIGN Cross-sectional study; SETTING Two national representative school-based surveys (1st and 2nd 'Mabat Youth') PARTICIPANTS Both surveys included female students in 7th-12th grades (ages 11-19 years). The first (N=3328) was conducted between the years 2003-2004, and the second (N=2535) from 2015-2016. INTERVENTION The survey questionnaire was self-administered and anthropometric measurements collected by trained personnel. MAIN OUTCOME MEASURES The current age at menarche in Israeli girls was determined and independent factors (demographic, clinical and lifestyle) examined. Changes that have occurred since the last national survey over a decade ago were documented. RESULTS The estimated median age at menarche declined from 13.0 years (IQR12.0, 14.0) in 2003-2004 to 12.5 years (IQR12.0, 13.0) in 2015-2016 (p less then 0.0001). Jewish girls reached menarche earlier than Arabs, but both populations experienced a similar downward trend in the past ∼14 years. Greater BMI, higher socioeconomic status and immigrant status were associated with younger menarche onset (p less then 0.001). Age at menarche remained lower in 2015-2016 versus 2003-2004, even after adjustment for these potential confounders, with a high hazard ratio (HR) which decreased as a function of survival time HRt=15.417*0.813t. CONCLUSIONS This study confirms the decline in age at menarche in Israel. Findings were associated with BMI and population group but also indicated that other factors are likely involved. INTRODUCTION The prevalence of obesity is increasing in the US. The treatment of end stage renal disease via hemodialysis spans the spectrum of body mass index (BMI). This study examines the impact of body mass index (BMI) on outcomes of autogenous fistulas for hemodialysis access in a large population based cohort of patients. METHODS A retrospective study of all patients in the prospectively maintained United States Renal Database System who initiated hemodialysis between 2007-2014 was performed. Chi-square, T-tests, Kaplan-Meier, log-rank tests, multivariable logistic and Cox regression analyses were employed to evaluate access maturation, interventions, patency, and mortality. RESULTS There were 300778 patients studied. Of these, 9394 (3.1%) were underweight, 87351 (29.1%) were normal weight, 86101 (28.6%) were overweight, 57047 (19%) were obese class I, 31077 (10.3%) were obese class II and 29808 (9.9%) were obese class III. There was no significant difference in maturation for patients who were underweiSIONS In this population-based cohort of hemodialysis dependent patients, obesity was associated with decrease in fistula maturation. Extremes of BMI were associated with lower patency, but higher BMI was associated with better patient survival. Obese patients nearing ESRD might require earlier referral for AVF placement in order to allow for maturation and AVF use at incident hemodialysis. OBJECTIVES This study aimed to examine a quantitative method for evaluating calcification in failure in recanalization (FR) in endovascular treatment of superficial femoral artery (SFA) chronic total occlusion, and to investigate the possibility of using a formula to predict the incidence of true lumen recanalization (TR) in such cases. METHODS Patients who met the inclusion criteria were retrospectively analyzed in our center from January 2012 to September 2017. A Calcification Lesion Analyzing and Scoring System (CLASS) was established to quantify the characteristics of calcification in SFA CT slices, which were ranked as grade 1-4 and class A-E. Corresponding scores were obtained, and the Cumulative Calcification Score (CCSo) of occlusive SFA was calculated on the basis of CLASS. The factors correlating to FR and the formula for predicting TR were evaluated. RESULTS A total of 215 patients were included in this study. There were 150 cases of TR and 65 cases of subintimal recanalization (SR); 12 (5.6%) cases had FR. The maximum CLASS of occlusion was correlated with FR. Not only the formula including TASC II grade and CCSo, but also the formula including occlusion length and CCSo predicted the incidence of TR well. CONCLUSIONS The degree of the most severe calcification in occlusive lesions clearly affects success in recanalization. Two quantitative formulas that combine occlusion length or TASC II grade with CCSO can predict TR in endovascular treatment of SFA lesions with chronic total occlusion. BACKGROUND The aim of this study was to analyze litigation involving compartment syndrome to identify the causes and outcomes of such malpractice suits. see more A better understanding of such litigation may provide insight into areas where clinicians may make improvements in the delivery of care. METHODS Jury verdict reviews from the Westlaw database from January 1, 2010 to January 1, 2018 were reviewed. The search term "compartment syndrome" was used to identify cases and extract data on the specialty of the physician defendant, the demographics of the plaintiff, the allegation, and the verdict. RESULTS A total of 124 individual cases involving the diagnosis of compartment syndrome were identified. Medical centers or the hospital was included as a defendant in 51.6% of cases. The most frequent physician defendants were orthopedic surgeons (45.96%), and emergency medicine physicians (20.16%), followed by cardiothoracic/vascular surgeons (16.93%). Failure to diagnose was the most frequently cited claim (71.8% of cases).
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