Unsteady and Incompressible Magneto-Hydrodynamics Blood Flow in an Inclined Cylindrical Channel
Published on: 18th August, 2023
In the current study, the blood flow through an inclined cylindrical tube subjected to an external magnetic field is evaluated. The blood flow has been considered under the consequence of a transverse magnetic field. Previously the mathematical model was solved by using Caputo-Fabrizio (CF) fractional order derivative with a non-singular kernel which has the limitations like it fails to satisfy the fundamental theorem of fractional calculus. Whereas, in the present study Adomian Decomposition Method (ADM) which is suitable for all types of linear and non-linear differential equations is used. The flow of magnetized blood in an inclined cylindrical tube has been studied by using the ADM. An external magnetic field and an oscillating pressure gradient drove the blood flow. ADM algorithm has been developed and used to find the Adomian solution. Computer software MATHEMATICA has been used to visualize the influence of various flow characteristics such as Hartmann number (Ha), different radial locations and angle of inclination on the Adomian velocity. Due to the Lorentz effect and central radial location, the results show that the magnetic field diminishes the velocities of blood. Meanwhile, progressive inclination angle enhanced the blood flow.
Rosai-Dorfman disease presenting as a breast mass
Published on: 18th March, 2019
OCLC Number/Unique Identifier: 8056347532
Rosai-Dorfman disease (RDD) is an idiopathic, benign proliferation of histiocytes that can be present in multiple organs such as lymph node, skin, soft tissue, orbit, central nerve system and bone; however, it rarely occurs in the breast. In general, RDD is a painless, firm and poorly defined lesion, which can radiologically mimic a breast cancer and is therefore an important differential consideration. The diagnosis of breast RDD is challenging, especially on a small biopsy specimen. We report a unique case of breast RDD with a literature review including common presentation, differential diagnosis, and recommended management. A high index of suspicion for this rare entity is essential to render a correct diagnosis, thereby avoiding unnecessary diagnostic tests and treatment.
Nanoencapsulated Extracts from Leaves of Bauhinia forficata Link: In vitro Antioxidant, Toxicogenetic, and Hypoglycemic Activity Effects in Streptozotocin-induced Diabetic Mice
Published on: 5th September, 2024
In this study, we evaluated the assessed the hypoglycemiant, toxicogenetic and genotoxic effects of nanoencapsulate extracts of Bauhinia forficata Link. Phytochemical evaluations of extracts were carried out, as well as the evaluation using HPLC-MS and of antioxidant capacity in vitro. DM2 was induced in mice with streptozotocin and extracts were given orally for 28 days. That dried extract from infusion (ESIN) had a higher rate of bioactive compounds compared to the dried extract from decoction (ESDC), and higher antioxidant capacity. Glucose levels decreased from 77.26% to 57.79% and 45.15% after supplementation with ESIN (200 and 600 mg/kg/day) and ESDC (600 mg/kg/day), respectively, when compared to the diabetic group treated with metformin (600 mg/kg/day) (21.53%), with an improvement in the glycemic response e recovery of pancreatic β cells. Thus, our study has shown that these extracts exhibit hypoglycemiant activity, with a beneficial effect superior to metformin, as a result they could be considered as potential therapeutic agents for application in pharmaceutical formulations in the treatment of DM2.
The “Calcium Paradox” Due To Ca2+/Camp Interaction: New Insights for the Neuroscience Field
Published on: 21st February, 2017
OCLC Number/Unique Identifier: 7317597469
In the cardiovascular field, tachycardia and increment of catecholamine plasma levels (sympathetic hyperactivity) have been reported by hypertensive patients that use L-type Ca2+ channel blockers (CCBs) since 70´s. Our discovery of the involvement of interaction between the intracellular signalling pathways mediated by Ca2+ and cAMP (Ca2+/cAMP interaction) revealed that this phenomenon (sympathetic hyperactivity) was resulting of increase of transmitter release from sympathetic neurons stimulated by CCBs due to its interference on the Ca2+/cAMP interaction. In the neuroscience field, this discovery has produced new paths for the understanding of the cellular and molecular mechanisms involved in the pathogenesis of neurodegenerative diseases, such as Alzheimer´s and Parkinson’s diseases. In this way, novel journeys for the development of new pharmacological strategies more effective for the treatment of neurodegenerative diseases may be initiated.
Step VEP visual acuity in a pediatric neuro-ophthalmological cohort
Published on: 12th June, 2022
Steady-state VEPs, have been used to estimate visual acuity since the 1970s and allow responses to a range of stimulus sizes to be collected rapidly- with particular utility in infants. However, the assessment of children with cortical visual impairment is a bigger challenge that lead to the development of the Step VEP. Its initial evaluation revealed that accuracy and precision were poorer for pediatric patients than for optically degraded normal adults and that it was not necessarily successful in every child. Statistical models generated the equations: VAO = 0.56 VAStep (r2 = 0.75, F = 60.93, p = 0.000) and VAPL = 0.45 VAStep (r2 = 0.82, F = 156.85, p = 0.000), supported by a recent a systematic review of VA comparisons showing that recognition VA (optotypes) agrees more closely than discrimination VA (PL) with VEP VA. In combination, Step VEPS and subjective tests allowed complete assessment in 96% of patients, with incomplete Step VEPS much more likely to be partially successful than not, and more likely to be partially successful than incomplete subjective tests. This supports the rationale that Step VEPs maintain attention by limiting the time spent stimulating away from an individual’s threshold of spatial resolution. For the small number of patients in whom VA cannot be estimated, alternative stimuli and methods of presentation are proposed.
Incidental findings in traditional nuclear medicine practice
Published on: 28th July, 2018
OCLC Number/Unique Identifier: 7802611730
The presence of an incidental finding, defined as an abnormality which is unrelated to the initial scanning indication, is widely increases due to the access to new devices and imaging modalities. This growing number of incidental findings can lead to additional medical care including unnecessary tests nevertheless, in a minority of patients, can lead to diagnosis of an important and unexpected condition that could be crucial for the patient. We reported three cases in which nuclear medicine imaging, performed for different reasons and showed a relevant and unexpected pathology. In the case 1, a bone scan, performed in a 66 aged woman for breast cancer staging, allowed the diagnosis of a uterine fibroma. In the case 2, a HMPAO labeled-WBC scintigraphy performed because of a suspect of osteomyelitis, showed a remarkable heart-shaped photopenic area, highly suggestive of cardiac global dilatation. In the case 3, a 62 aged man referred to bone scintigraphy for the staging of recent diagnosed lung cancer. The bone scan allowed the diagnosis of a meningioma. Therefore, the occurrence of incidental findings could lead to reveal relevant abnormalities for the diagnostic pathway.
Pregnancy and childbirth in women aged 40 and over at befelatanana maternity, Madagascar
Published on: 24th December, 2019
OCLC Number/Unique Identifier: 8501548256
Objective: Pregnancy after age 40 remains a concern as it exposes to particular obstetrical complications. Our study aims to determine the risks of complications related to pregnancy and childbirth of women aged 40 and over.
Study design: We carried out a cross-sectional analytical study of a historical cohort comparing the progress and the outcome of pregnancy in women 40 years of age and over to those aged 20 and 35 who gave birth at the University Hospital of Obstetrics and Gynecology in Befelatanana, from 1st January 2010 to 31 December 2013.
Results: The prevalence of childbirth among 40 years old and over was 0.61%. They were multiparous and large multiparous in 88% of the cases. The analysis showed that parturients aged 40 years and older were at significant risk for caesarean section, with three times the risk of emergency caesarean section. The frequency of this emergency caesarean section increased with parity ((RR = 3.04 [2.15-4.30], p = 10-10). Among their neonates, 23.42% were hypotrophic, 22.86% premature, 12% asphyxiated at birth, 13.14% admitted to neonatal resuscitation and 5.71% died in utero, but without significant difference with the group unexposed. Perinatal death was 7.43% in women aged 40 and over vs. 4% in 20 to 35 year olds ((RR = 1.85 [0,89-3,86]; p 0.052).
Conclusion: We found that pregnancies after 40 years were not exposed to pregnancy-related pathologies or specific fetal complications. The use of an emergency cesarean is, however, frequent.
Protective functions of AEURA in Cell Based Model of Stroke and Alzheimer disease
Published on: 6th June, 2017
OCLC Number/Unique Identifier: 7317651488
Stroke and neurodegenerative diseases including Alzheimer’s disease (AD) are responsible for a major proportion of mortalities in the elderly. We have previously investigated novel mechanism-based therapies of AEURA in cell culture models against viral infection and in glutamate excitotoxity. In our new studies, we propose that the homeopathic formula AEURA could serve as a potential therapeutic agent for stroke & for AD. In examining AEURA treatment of PC12 cells exposed to glutamate excitotoxicity, hypoxia /re-oxygenation injury and A-Beta toxicity. We demonstrated an increased survival rate in AEURA treated cells by comparison to control cells. In examining the therapeutic potential of AEURA in PC12 cells this homeopathic agent was found to be neuroprotective against either glutamate induced toxicity, hypoxia /re-oxygenation stress or cell stress resulting from viral infection (with either HSV-1 or rhinovirus). Our ongoing studies involve examining the neuroprotective potential AEURA in vivo using rodent models of stroke & AD.
Direct Carotid Puncture for Flow Diverter Stent Insertion
Published on: 30th June, 2017
OCLC Number/Unique Identifier: 7317653750
Objective: To report our experience of direct carotid puncture and its use in the management of a large and rapidly expanding cavernous aneurysm.
Methods: A patient with a cavernous aneurysm that measured 25mm in maximum diameter underwent treatment with flow diversion. The initial treatment strategy was parent vessel occlusion however she failed the balloon occlusion test at 3 minutes. Due to extremely tortuous vessels stable access via a common femoral artery approach was impossible to achieve. We present our strategy, the post-operative management and long term results.
Results: Using a direct carotid puncture three telescoped Pipeline embolisation devices were successfully deployed across the neck of the cavernous aneurysm without complication. The puncture site formed a stable platelet plug after direct compression with an ultrasound probe for 90 minutes with no post-operative complications either intracranially or at the neck puncture site. At 2 year follow-up the aneurysm is completely excluded from the circulation.
Conclusion: Direct carotid puncture can be used as access for intracranial interventional procedures even if patients are on dual anti-platelet medication.
The Cortisol Connection: Weight Gain and Stress Hormones
Published on: 28th March, 2024
Weight gain can be good or bad for health. Benefits include increased health for overweight people, disease or surgical recovery, and more. Health concerns, joint and musculoskeletal disorders, respiratory issues, metabolic abnormalities, cardiovascular health, psychological impact, reduced mobility, digestive troubles, hormonal changes, and cancer risk are negative impacts. Weight gain outcomes depend on heredity, weight distribution, and health. Maintaining a healthy weight needs a balanced diet, regular exercise, and stress management. A doctor or nutritionist can offer personalized weight management advice. Stress chemicals like cortisol trigger weight gain. ACTH stimulates adrenal glands to release cortisol, which increases hunger, fat storage, insulin resistance, and muscle loss. Understanding how stress hormones like cortisol affect weight gain is vital to reducing chronic stress’s health risks. Stress reduction, a balanced diet, regular exercise, proper sleep, social support, and professional treatment can mitigate these outcomes. Ultimately, stress hormones like cortisol can cause weight gain, but a holistic strategy tackling physical and psychological stress can help people maintain a healthy weight.
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