Mapping lumbar efferent and afferent spinal circuitries via paddle array in a porcine model.

BACKGROUND: Preclinical models are essential for identifying changes occurring after neurologic injury and assessing therapeutic interventions. Yucatan miniature pigs (minipigs) have brain and spinal cord dimensions like humans and are useful for laboratory-to-clinic studies. Yet, little work has been done to map spinal sensorimotor distributions and identify similarities and differences between the porcine and human spinal cords. NEW METHODS: To characterize efferent and afferent signaling, we implanted a conventional 32-contact, four-column array into the dorsal epidural space over the lumbosacral spinal cord, spanning the L5-L6 vertebrae, in two Yucatan minipigs. Spinally evoked motor potentials were recorded bilaterally in four hindlimb muscles during stimulation delivered from different array locations. Then, cord dorsum potentials were recorded via the array by stimulating the left and right tibial nerves. RESULTS: Utilizing epidural spinal stimulation, we achieved selective left, right, proximal, and distal activation in the hindlimb muscles. We then determined the selectivity of each muscle as a function of stimulation location which relates to the distribution of the lumbar motor pools. COMPARISON WITH EXISTING METHODS: Mapping motoneuron distribution to hindlimb muscles and recording responses to peripheral nerve stimulation in the dorsal epidural space reveals insights into ascending and descending signal propagation in the lumbar spinal cord. Clinical-grade arrays have not been utilized in a porcine model. CONCLUSIONS: These results indicate that efferent and afferent spinal sensorimotor networks are spatially distinct, provide information about the organization of motor pools in the lumbar enlargement, and demonstrate the feasibility of using clinical-grade devices in large animal research.

Comparison of risk assessment tools for cardiovascular diseases: results of an Iranian cohort study.

OBJECTIVES: Several popular cardiovascular risk assessment tools have been developed in Western countries; however, the predictive abilities of these tools have not been evaluated in Middle Eastern countries. The present study aimed to determine the abilities of cardiovascular risk assessment tools in a population-based study in Northern Iran. STUDY DESIGN: Population-based cohort study in Northern Iran. METHODS: In total, 2883 individuals (1629 men and 1254 women), aged 40-74 years, were included in the study. We determined the predictive abilities of the American College of Cardiology/American Heart Association (ACC/AHA) risk prediction tool, the Framingham general cardiovascular risk profile in primary care settings, and the Systematic Coronary Risk Evaluation (SCORE) equations for low- and high-risk European countries. Receiver operating characteristic (ROC) analysis was used to determine the predictive abilities of these four risk assessment tools. RESULTS: Based on areas under curve (AUC) values and related 95% confidence intervals (95% CIs), the discriminative abilities of the ACC/AHA tool, the Framingham approach, and the SCORE for low- and high-risk European countries to estimate non-fatal cardiovascular disease (CVD) events were 0.6625, 0.6517, 0.6476 and 0.6458, respectively, in men, and 0.7722, 0.7525, 0.7330 and 0.7331, respectively, in women. Moreover, the abilities of these four tools to estimate fatal CVD events were found to be 0.8614, 0.8329, 0.7996 and 0.7988 in men, and 0.8779, 0.8372, 0.8535 and 0.8518 in women, respectively. CONCLUSIONS: The cardiovascular risk assessment tools investigated in this study showed acceptable predictive abilities in women. The ACC/AHA approach showed slightly better performance compared with the SCORE tool; however, the SCORE tool benefited from the lowest cost compared with all the other tools.

Iron Deficiency and Iron Deficiency Anemia in Women with Bronchial Asthma.

This case control study was conducted in the out patient department (OPD), Enam Medical College & Hospital (EMCH), Dhaka, Bangladesh from 1st January 2017 to 31st December 2017. The aim of our study was to find the possible association between serum iron state and iron deficiency anemia with bronchial asthma in women. We investigated 40 diagnosed female cases of well controlled bronchial asthma and 20 healthy female as control. In both groups complete blood count (CBC) with peripheral smear was done, C-reactive protein (CRP), serum iron, serum ferritin, and serum total iron binding capacity (TIBC) was measured. We found asthma cases had lower hemoglobin than control (mean±SD 10.92±1.34 vs. 12.30±0.73, p value 0.013), serum iron and serum ferritin were significantly lower (p value 0.016 and 0.000 respectively) and TIBC was higher (p value 0.000) in asthmatic cases as compared to controls. Non anemic asthmatics showed significant lower serum ferritin compared with non-anemic healthy controls (p value 0.005). So we conclude that iron deficiency anemia is more prevalent in asthmatic women as compared to healthy controls.

Assessment of Quality of Life of Chronic Kidney Disease Patients Receiving Hemodialysis with Kidney Disease Quality of Life™-36 Scale.

Chronic kidney disease and the methods of its treatment play an important part in shaping the Quality of Life QOL of patients receiving dialysis. KDQOL™-36 is the most widely used instrument to evaluate health related quality of life of chronic kidney disease patients. The aim of the study was the subjective assessment of the quality of life (QOL) of patients treated with hemodialysis and also to understand the distribution of component scores of the scale with distribution of responses to individual items of the scale among the selected sample. This cross sectional study was conducted among randomly selected 151 patients of chronic kidney disease receiving hemodialysis with pre-dialysis proper education at Inpatient Department in National Institute of Kidney Diseases and Urology (NIKDU), Dhaka, Bangladesh during the period of June 2018 to December 2018. The instrument to measure the QOL was Kidney Disease and Quality of Life Bangla version 36 (KDQOL™-36). Recruited patients were interviewed with questionnaire technique to collect data with the scale which is a structured questionnaire comprised of four subscales. Mean scores ±SD of the domain of the physical and mental component summary, burden of kidney disease, symptoms and problems of kidney disease and effects of kidney disease subscales were 29.3±16.03, 16.93±13.0, 81.09±13.14 and 61.67±13.84 respectively. The mean ±SD of the combined score for all the four domains was 47.24±11.52. The rate of those with impaired QOL (mean score <66.7) was 96.7%. The most bothersome domain was burden of the kidney disease domain, where the mean scores of all the items were below 66.7. The study provides information that regular pre-dialysis attendance helps to provide the patient with proper education and thereby achieve better QOL among patients of chronic kidney disease receiving hemodialysis. By using the KDQOL™-36 scale this study finds that the domain of symptom of the kidney disease appeared to have least effect on the quality of life as the mean scores ranged higher from other subscales and in most cases the scores were above 66.7.