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1.
Emerg Infect Dis ; 30(7): 1398-1401, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38916574

RESUMO

We describe a recent case of lymphatic filariasis in Colombia caused by Wuchereria bancrofti nematodes. Our study combines clinical-epidemiologic findings with phylogenetic data. Resurgence of lymphatic filariasis may be linked to increasing urbanization trends and migration from previously endemic regions. Fieldwork can be a beneficial tool for screening and containing transmission.


Assuntos
Filariose Linfática , Wuchereria bancrofti , Filariose Linfática/epidemiologia , Colômbia/epidemiologia , Wuchereria bancrofti/genética , Humanos , Animais , Filogenia , Masculino , Adulto , Feminino , Pessoa de Meia-Idade
2.
Mol Pharmacol ; 98(6): 677-685, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-33008920

RESUMO

Regulator of G protein signaling (RGS) proteins are negative modulators of G protein signaling that have emerged as promising drug targets to improve specificity and reduce side effects of G protein-coupled receptor-related therapies. Several small molecule RGS protein inhibitors have been identified; however, enhancing RGS protein function is often more clinically desirable but presents a challenge. Low protein levels of RGS2 are associated with various pathologies, including hypertension and heart failure. For this reason, RGS2 is a prominent example wherein enhancing its function would be beneficial. RGS2 is rapidly ubiquitinated and proteasomally degraded, providing a point of intervention for small molecule RGS2-stabilizing compounds. We previously identified a novel cullin-RING E3 ligase utilizing F-box only protein 44 (FBXO44) as the substrate recognition component. Here, we demonstrate that RGS2 associates with FBXO44 through a stretch of residues in its N terminus. RGS2 contains four methionine residues close to the N terminus that can act as alternative translation initiation sites. The shorter translation initiation variants display reduced ubiquitination and proteasomal degradation as a result of lost association with FBXO44. In addition, we show that phosphorylation of Ser3 may be an additional mechanism to protect RGS2 from FBXO44-mediated proteasomal degradation. These findings contribute to elucidating mechanisms regulating steady state levels of RGS2 protein and will inform future studies to develop small molecule RGS2 stabilizers. These would serve as novel leads in pathologies associated with low RGS2 protein levels, such as hypertension, heart failure, and anxiety. SIGNIFICANCE STATEMENT: E3 ligases provide a novel point of intervention for therapeutic development, but progress is hindered by the lack of available information about specific E3-substrate pairs. Here, we provide molecular detail on the recognition of regulator of G protein signaling protein 2 (RGS2) by its E3 ligase, increasing the potential for rational design of small molecule RGS2 protein stabilizers. These would be clinically useful in pathologies associated with low RGS2 protein levels, such as hypertension, heart failure, and anxiety.


Assuntos
Proteínas F-Box/metabolismo , Proteínas RGS/metabolismo , Células HEK293 , Humanos , Mutagênese Sítio-Dirigida , Mutação , Iniciação Traducional da Cadeia Peptídica/fisiologia , Fosforilação , Complexo de Endopeptidases do Proteassoma/metabolismo , Ligação Proteica/genética , Estabilidade Proteica , Proteólise , Proteínas RGS/genética , Ubiquitinação/fisiologia
3.
Bull Hist Med ; 92(1): 110-140, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29681552

RESUMO

Vaccination played an important role in the formation of a national consciousness in Cuba, and vaccination's earliest promoters dominate nationalist narratives of medical achievement on the island. This article investigates the intense hostility exhibited by the creole medical elite toward a pivotal figure in the history of smallpox vaccination in Cuba, Spanish physician Dr. Vicente Ferrer (1823-83), the first in the Americas to mass produce smallpox vaccine using calf vaccinifiers. I argue that anger and mistrust of both Ferrer and his innovatory vaccine production technology originated in the relationship between medical politics and cultural identity in late nineteenth-century Cuba. By the late nineteenth century, smallpox vaccination was linked to glorified memories of a Cuban creole-led vaccination program and a disinterested medical profession. Both Ferrer and his private institution for the mass production of "cowpox" became associated with destructive changes in public health, challenging cultural narratives and regional power structures.


Assuntos
Varíola Bovina/história , Médicos/história , Política , Saúde Pública/história , Vacina Antivariólica/história , Cuba , História do Século XIX , Vacinação/história
4.
Materials (Basel) ; 17(5)2024 Feb 26.
Artigo em Inglês | MEDLINE | ID: mdl-38473546

RESUMO

Recently, the manufacturing of porous polydimethylsiloxane (PDMS) with engineered porosity has gained considerable interest due to its tunable material properties and diverse applications. An innovative approach to control the porosity of PDMS is to use transient liquid phase water to improve its mechanical properties, which has been explored in this work. Adjusting the ratios of deionized water to the PDMS precursor during blending and subsequent curing processes allows for controlled porosity, yielding water emulsion foam with tailored properties. The PDMS-to-water weight ratios were engineered ranging from 100:0 to 10:90, with the 65:35 specimen exhibiting the best mechanical properties with a Young's Modulus of 1.17 MPa, energy absorption of 0.33 MPa, and compressive strength of 3.50 MPa. This led to a porous sample exhibiting a 31.46% increase in the modulus of elasticity over a bulk PDMS sample. Dowsil SE 1700 was then added, improving the storage capabilities of the precursor. The optimal storage temperature was probed, with -60 °C resulting in great pore stability throughout a three-week duration. The possibility of using these water emulsion foams for paste extrusion additive manufacturing (AM) was also analyzed by implementing a rheological modifier, fumed silica. Fumed silica's impact on viscosity was examined, revealing that 9 wt% of silica demonstrates optimal rheological behaviors for AM, bearing a viscosity of 10,290 Pa·s while demonstrating shear-thinning and thixotropic behavior. This study suggests that water can be used as pore-formers for PDMS in conjunction with AM to produce engineered materials and structures for aerospace, medical, and defense industries as sensors, microfluidic devices, and lightweight structures.

5.
Biomed Pharmacother ; 170: 115977, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38056237

RESUMO

Warfarin, an oral anticoagulant, has been used for decades to prevent thromboembolic events. The complex interplay between CYP2C9 and VKORC1 genotypes on warfarin PK and PD properties is not fully understood in special sub-groups of patients. This study aimed to externally validate a population pharmacokinetic/pharmacodynamic (PK/PD) model for the effect of warfarin on international normalized ratio (INR) and to evaluate optimal dosing strategies based on the selected covariates in Caribbean Hispanic patients. INR, and CYP2C9 and VKORC1 genotypes from 138 patients were used to develop a population PK/PD model in NONMEM. The structural definition of a previously published PD model for INR was implemented. A numerical evaluation of the parameter-covariate relationship was performed. Simulations were conducted to determine optimal dosing strategies for each genotype combinations, focusing on achieving therapeutic INR levels. Findings revealed elevated IC50 for G/G, G/A, and A/A VKORC1 haplotypes (11.76, 10.49, and 9.22 mg/L, respectively), in this population compared to previous reports. The model-guided dosing analysis recommended daily warfarin doses of 3-5 mg for most genotypes to maintain desired INR levels, although subjects with combination of CYP2C9 and VKORC1 genotypes * 2/* 2-, * 2/* 3- and * 2/* 5-A/A would require only 1 mg daily. This research underscores the potential of population PK/PD modeling to inform personalized warfarin dosing in populations typically underrepresented in clinical studies, potentially leading to improved treatment outcomes and patient safety. By integrating genetic factors and clinical data, this approach could pave the way for more effective and tailored anticoagulation therapy in diverse patient groups.


Assuntos
Hidrocarboneto de Aril Hidroxilases , Varfarina , Humanos , Anticoagulantes/farmacologia , Citocromo P-450 CYP2C9/genética , Genótipo , Hispânico ou Latino/genética , Vitamina K Epóxido Redutases/genética , População do Caribe
6.
Ecol Evol ; 13(11): e10689, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37937273

RESUMO

Early life adversity predicts shorter adult lifespan in several animal taxa. Yet, work on long-lived primate populations suggests the evolution of mechanisms that contribute to resiliency and long lives despite early life insults. Here, we tested associations between individual and cumulative early life adversity and lifespan on rhesus macaques at the Cayo Santiago Biological Field Station using 50 years of demographic data. We performed sex-specific survival analyses at different life stages to contrast short-term effects of adversity (i.e., infant survival) with long-term effects (i.e., adult survival). Female infants showed vulnerability to multiple adversities at birth, but affected females who survived to adulthood experienced a reduced risk later in life. In contrast, male infants showed vulnerability to a lower number of adversities at birth, but those who survived to adulthood were negatively affected by both early life individual and cumulative adversity. Our study shows profound immediate effects of insults  on female infant cohorts and suggests that affected female adults are more robust. In contrast, adult males who experienced harsh conditions early in life showed an increased mortality risk at older ages as expected from hypotheses within the life course perspective. Our analysis suggests sex-specific selection pressures on life histories and highlights the need for studies addressing the effects of early life adversity across multiple life stages.

7.
Artigo em Inglês | MEDLINE | ID: mdl-37704906

RESUMO

Individuals who provide services for people living with HIV (PLWH) face numerous work-related challenges, including psychosocial and structural factors affecting the quality of care that they provide. Little is known about the factors that relate to burnout among service providers for PLWH. The current study seeks to examine the factors associated with burnout and the role of resilience and coping in the context of burnout. Via convenience sampling, data was collected from 28 professionals (e.g., peer counselors, HIV testers, case managers/case workers, group facilitators, or social workers) serving PLWH in the USA. Participants completed quantitative measures on sociodemographics, organizational factors, discrimination, trauma, depression, and burnout. A sub-sample of 19 participants provided in-depth qualitative data via semi-structured interviews on burnout, coping, and resilience as a buffer against the effects of burnout. Thematic content analysis revealed themes on the factors related to burnout (e.g., discrimination, limited financial and housing resources, and COVID-19), rejuvenating factors, coping with burnout, and intervention strategies. Additionally, Pearson's product moment correlations revealed significant associations between mental health variables such as depressive and posttraumatic stress disorder symptomology with (a) discrimination and microaggressions and (b) burnout. The current study highlights challenges to providing HIV care, including structural barriers and discrimination that are doubly impactful to the professionals in this sample who share identities with the PLWH whom they serve. These findings may inform the development of an intervention targeting burnout among individuals providing services to PLWH and motivate change to remove structural barriers and improve quality of care for PLWH.

8.
JACC Case Rep ; 22: 101951, 2023 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-37790774

RESUMO

Electrocardiogram changes during stress tests are well standardized and understood. We present and explain a reversible QRS morphology change at peak exercise previously unreported. (Level of Difficulty: Intermediate.).

9.
Am J Clin Dermatol ; 24(3): 453-467, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-37142875

RESUMO

BACKGROUND: Immune checkpoint inhibition (ICI) has changed the melanoma treatment spectrum. Few studies have examined the characteristics and long-term outcomes of patients achieving complete response (CR) under ICI. MATERIALS AND METHODS: We evaluated patients with unresectable stage IV melanoma treated with first-line ICI. The characteristics of those achieving CR were compared with those not achieving CR. Progression-free survival (PFS) and overall survival (OS) were assessed. Late-onset toxicities, response to second-line treatment, the prognostic value of clinicopathologic features, and blood markers were examined. RESULTS: A total of 265 patients were included; 41 (15.5%) achieved CR, while 224 (84.5%) had progressive disease, stable disease, or partial response. At the therapy start, those who had CR were more likely to be older than 65 years of age (p = 0.013), have a platelet-to-lymphocyte ratio below 213 (p = 0.036), and have lower lactate dehydrogenase levels (p = 0.008) than those not achieving a CR. For those who discontinued therapy after CR, the median follow-up time after CR was 56 months (interquartile range [IQR] 52-58) and the median time from CR to therapy end was 10 months (IQR 1-17). Five-year PFS after CR was 79% and 5-year OS was 83%. Most complete responders had a normalization of S100 at the time of CR (p < 0.001). In simple Cox regression analysis, age below 77 years at CR (p = 0.04) was associated with better prognosis after CR. Eight patients received second-line ICI; disease control was seen in 63%. Late immune-related toxicities occurred in 25% of patients, most being cutaneous immune-related toxicities. CONCLUSIONS: Response, according to the Response Evaluation Criteria in Solid Tumors (RECIST) criteria, is, until now, the most important prognostic factor, and CR is a valid surrogate marker for long-term survival in patients treated with ICI. Our results highlight the importance of investigating the optimal therapy duration in complete responders.


Assuntos
Melanoma , Humanos , Idoso , Prognóstico , Indução de Remissão , Intervalo Livre de Progressão , Imunoterapia , Estudos Retrospectivos
10.
P R Health Sci J ; 42(3): 226-232, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37709680

RESUMO

OBJECTIVE: Past studies have demonstrated that women with inflammatory bowel disease (IBD) have a higher risk of gynecological conditions than do women without it. We aimed to characterize the gynecological histories of Hispanic Women living in Puerto Rico with IBD. METHODS: We identified women, aged 21 to 55 years, with a confirmed IBD diagnosis and receiving follow-up care from the University of Puerto Rico IBD clinics from 2017 through 2020. A questionnaire was administered to acquire sociodemographics, family history, past medical history, IBD diagnosis, and gynecologic aspects. RESULTS: One hundred eighty-six women were recruited. Fifty-three (28%) patients had ulcerative colitis, while 133 (72%) had Crohn's disease. Fifty-six percent of all the participants had a chronic illness in addition to than their IBD. Seventy-four out of 186 patients reported having had at least 1 late period within the last 12 months. Fifty-three (28%) described their period patterns as irregular. Thirty-nine (21%) of the patients reported having been vaccinated against human papillomavirus (HPV), and 8 (4%) had been infected by it. Nine out of 186 (5%) patients reported suffering from infertility. CONCLUSION: The results showed that our Hispanic patients (living in Puerto Rico) had a prevalence of irregular menstrual cycles that was similar to that observed in other populations. On the other hand, the presence of HPV, infertility, and cervical cancer were lower and the frequency of Papanicolaou smears performed higher than what has been seen in the continental United States, suggesting that this topic should be investigated in future studies.


Assuntos
Colite Ulcerativa , Doenças dos Genitais Femininos , Infertilidade , Doenças Inflamatórias Intestinais , Infecções por Papillomavirus , Feminino , Humanos , Doenças Inflamatórias Intestinais/epidemiologia , Colite Ulcerativa/epidemiologia , Papillomavirus Humano
11.
Ecol Evol ; 12(1): e8456, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-35136546

RESUMO

Adversity early in life can shape the reproductive potential of individuals through negative effects on health and life span. However, long-lived populations with multiple reproductive events may present alternative life history strategies to optimize reproductive schedules and compensate for shorter life spans. Here, we quantify the effects of major hurricanes and density dependence as sources of early-life ecological adversity on Cayo Santiago rhesus macaque female reproduction and decompose their effects onto the mean age-specific fertility, reproductive pace, and lifetime reproductive success (LRS). Females experiencing major hurricanes exhibit a delayed reproductive debut but maintain the pace of reproduction past debut and show a higher mean fertility during prime reproductive ages, relative to unaffected females. Increasing density at birth is associated to a decrease in mean fertility and reproductive pace, but such association is absent at intermediate densities. When combined, our study reveals that hurricanes early in life predict a delay-overshoot pattern in mean age-specific fertility that supports the maintenance of LRS. In contrast to predictive adaptive response models of accelerated reproduction, this long-lived population presents a novel reproductive strategy where females who experience major natural disasters early in life ultimately overcome their initial reproductive penalty with no major negative fitness outcomes. Density presents a more complex relation with reproduction that suggests females experiencing a population regulated at intermediate densities early in life will escape density dependence and show optimized reproductive schedules. Our results support hypotheses about life history trade-offs in which adversity-affected females ensure their future reproductive potential by allocating more energy to growth or maintenance processes at younger adult ages.

12.
Folia Med (Plovdiv) ; 62(4): 645-654, 2020 Dec 31.
Artigo em Inglês | MEDLINE | ID: mdl-33415907

RESUMO

Insomnia is a chronic condition that occurs a minimum of three times per week over a period of three or more subsequent months. There are multiple causes of insomnia, and even though it is considered a symptom, it can be associated with chronic illnesses. Chronic pain syndrome, which is defined as pain that persists for a period longer than 3 months, is one of several etiologies of insomnia. The prevalence of insomnia among chronic pain patients is greater in comparison with the general population (percentage or ratio). Chronic pain is common in patients with rheumatoid arthritis, spinal pain (such as chronic back pain) and fibromyalgia. The prevalence of in-somnia is also higher in cancer patients when compared to the general population. When the clinical history indicates a straightforward diagnosis of chronic pain syndrome, patients will complain of insomnia as part of their symptomatology. It is imperative to manage their underlying illness to alleviate their sleep disorder. Various medications may be used to relieve and even improve pain symptoms. Other than pharmacological interventions, non-pharmacological alternatives such as yoga, meditation, acupuncture, and psychotherapy can help improve the quality of life of these patients. The purpose of this article is to review the diagnosis and management of insomnia in chronic pain syndrome and its impact on the quality of life.


Assuntos
Dor Crônica/complicações , Qualidade de Vida , Distúrbios do Início e da Manutenção do Sono/epidemiologia , Sono/fisiologia , Dor Crônica/epidemiologia , Dor Crônica/fisiopatologia , Saúde Global , Humanos , Incidência , Distúrbios do Início e da Manutenção do Sono/etiologia , Distúrbios do Início e da Manutenção do Sono/fisiopatologia , Síndrome
13.
Drug Metab Pers Ther ; 35(4)2020 08 18.
Artigo em Inglês | MEDLINE | ID: mdl-34704696

RESUMO

OBJECTIVES: The inter-individual variability of warfarin dosing has been linked to genetic polymorphisms. This study was aimed at performing genotype-driven pharmacokinetic (PK) simulations to predict warfarin levels in Puerto Ricans. METHODS: Analysis of each individual dataset was performed by one-compartmental modeling using WinNonlin®v6.4. The ke of warfarin given a cytochrome P450 2C9 (CYP2C9) genotype ranged from 0.0189 to 0.0075 h-1. Ka and Vd parameters were taken from literature. Data from 128 subjects were divided into two groups (i.e., wild-types and carriers) and statistical analyses of PK parameters were performed by unpaired t-tests. RESULTS: In the carrier group (n=64), 53 subjects were single-carriers and 11 double-carriers (i.e., *2/*2, *2/*3, *2/*5, *3/*5, and *3/*8). The mean peak concentration (Cmax) was higher for wild-type (0.36±0.12 vs. 0.32±0.14 mg/L). Likewise, the average clearance (CL) parameter was faster among non-carriers (0.22±0.03 vs. 0.17±0.05 L/h; p=0.0001), with also lower area under the curve (AUC) when compared to carriers (20.43±6.97 vs. 24.78±11.26 h mg/L; p=0.025). Statistical analysis revealed a significant difference between groups with regard to AUC and CL, but not for Cmax. This can be explained by the variation of ke across different genotypes. CONCLUSIONS: The results provided useful information for warfarin dosing predictions that take into consideration important individual PK and genotyping data.


Assuntos
Hidrocarboneto de Aril Hidroxilases , Varfarina , Anticoagulantes , Hidrocarboneto de Aril Hidroxilases/genética , Citocromo P-450 CYP2C9/genética , Genótipo , Hispânico ou Latino , Humanos , Vitamina K Epóxido Redutases/genética , Varfarina/farmacocinética
14.
Drug Metab Pers Ther ; 2020 Aug 19.
Artigo em Inglês | MEDLINE | ID: mdl-32809952

RESUMO

Objectives The inter-individual variability of warfarin dosing has been linked to genetic polymorphisms. This study was aimed at performing genotype-driven pharmacokinetic (PK) simulations to predict warfarin levels in Puerto Ricans. Methods Analysis of each individual dataset was performed by one-compartmental modeling using WinNonlin®v6.4. The k e of warfarin given a cytochrome P450 2C9 (CYP2C9) genotype ranged from 0.0189 to 0.0075 h-1. K a and V d parameters were taken from literature. Data from 128 subjects were divided into two groups (i.e., wild-types and carriers) and statistical analyses of PK parameters were performed by unpaired t-tests. Results In the carrier group (n=64), 53 subjects were single-carriers and 11 double-carriers (i.e., *2/*2, *2/*3, *2/*5, *3/*5, and *3/*8). The mean peak concentration (Cmax) was higher for wild-type (0.36±0.12 vs. 0.32±0.14 mg/L). Likewise, the average clearance (CL) parameter was faster among non-carriers (0.22±0.03 vs. 0.17±0.05 L/h; p=0.0001), with also lower area under the curve (AUC) when compared to carriers (20.43±6.97 vs. 24.78±11.26 h mg/L; p=0.025). Statistical analysis revealed a significant difference between groups with regard to AUC and CL, but not for Cmax. This can be explained by the variation of k e across different genotypes. Conclusions The results provided useful information for warfarin dosing predictions that take into consideration important individual PK and genotyping data.

15.
Eur J Echocardiogr ; 10(4): 556-61, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19202147

RESUMO

AIMS: The aim of this article was to assess whether abnormal dobutamine stress echocardiography (DSE) can be due to a dobutamine-induced coronary spasm in patients with angiographically documented vasospastic coronary arteries. METHODS AND RESULTS: Between January 2004 and April 2008, we prospectively evaluated all patients with known or suspected coronary artery disease (CAD) referred to the echocardiography laboratory for dobutamine stress tests (6061 examinations). Those with abnormal DSE underwent coronary angiogram with a systematic methylergometrine intracoronary injection in the case of absence of significant coronary stenosis or spontaneous occlusive coronary spasm. Patients who had spontaneous occlusive coronary spasm or positive methylergometrine test, but no significant stenoses, were ultimately included in this study. About 581 patients had abnormal DSE, among them only 20 (3.4%) fulfilled the inclusion criteria. There were 15 males and 5 females, and mean age was 64.35 years (range 52-85); 8 patients had a known history of CAD and all of them had at least two established cardiovascular risk factors. The culprit vessel was the left anterior descending artery in 10 cases (50%), right coronary artery in 8 cases (40%), and left circumflex in 2 cases (10%). There was a systematic correspondence between the culprit arteries and dobutamine-induced wall motion abnormality territories. No complications occurred during examination or during the provocation test. All the patients were discharged with a calcium channel blocker and were doing well after 13 months of mean follow-up. CONCLUSION: Coronary artery spasm can be induced at DSE, but is a rare finding; it could, though, be clinically relevant as it may partly explain some erroneously labelled 'false-positive' examinations. Methylergometrine provocation test is a safe and advisable approach in such situations.


Assuntos
Doença da Artéria Coronariana/diagnóstico por imagem , Vasoespasmo Coronário/etiologia , Ecocardiografia sob Estresse/efeitos adversos , Agonistas Adrenérgicos beta/administração & dosagem , Idoso , Idoso de 80 Anos ou mais , Angiografia Coronária , Doença da Artéria Coronariana/complicações , Estenose Coronária/diagnóstico por imagem , Vasoespasmo Coronário/diagnóstico por imagem , Dobutamina/administração & dosagem , Ecocardiografia , Eletrocardiografia , Reações Falso-Positivas , Feminino , Humanos , Masculino , Metilergonovina , Pessoa de Meia-Idade , Ocitócicos , Estudos Prospectivos
16.
J Trauma ; 64(6): 1665-72, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-18545136

RESUMO

The development of life-saving techniques in medical emergencies often requires enrollment of patients into clinical trials without the opportunity for informed consent. The Food and Drug Administration had designated such exemptions from informed consent for the purpose of emergency research as "the Final Rule." In the decade following the Final Rule for emergency research, little progress has been made in the study of therapies for acute, life-threatening conditions with high mortality rates. The potential for significant change in accepting research without consent begins with a level of public knowledge, trust, and credibility in the healthcare delivery system. This review seeks to address the Final Rule and its ramifications and issues that undermine the provisions of emergency research. In understanding the complexities of emergency research and its potential, there are opportunities for improvement for the scientific community to develop a greater understanding of the general public's attitudes and perceptions concerning research without consent.


Assuntos
Pesquisa Biomédica/legislação & jurisprudência , Protocolos Clínicos/normas , Medicina de Emergência , Experimentação Humana/legislação & jurisprudência , Consentimento Livre e Esclarecido/legislação & jurisprudência , Feminino , Humanos , Masculino , Formulação de Políticas , Consentimento Presumido/legislação & jurisprudência , Estados Unidos , United States Food and Drug Administration
18.
J Emerg Med ; 32(2): 171-4, 2007 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-17307627

RESUMO

Envenomation from cobra bites causes major morbidity and mortality in Asia and Africa but rarely in the United States. We describe two patients bitten by the Asiatic Cobra (Naja Kaouthia)--both successfully treated in the emergency department. Patient 1 was a 23-year-old woman bitten in the buttock by her cobra. Examination demonstrated two puncture wounds. She developed cranial neuropathy, respiratory failure, and coagulopathy 10 h later, necessitating endotracheal intubation and polyvalent antivenom administration. The patient recovered fully with minimal wound necrosis. Patient 2, a 44-year-old man, was bitten on the hand by his cobra. Examination revealed a puncture wound with progressive swelling. Edrophonium and monovalent antivenom were administered, and he recovered uneventfully. These cases emphasize the varied clinical presentations of the Asiatic cobra. Patient 1 developed delayed neurotoxicity, respiratory failure, and hematotoxicity with minimal wound necrosis, whereas Patient 2 experienced a more typical clinical course.


Assuntos
Antivenenos/uso terapêutico , Venenos Elapídicos/efeitos adversos , Elapidae , Síndromes Neurotóxicas/fisiopatologia , Mordeduras de Serpentes/tratamento farmacológico , Adulto , Animais , Serviços Médicos de Emergência , Feminino , Humanos , Masculino , Necrose/etiologia , Síndromes Neurotóxicas/terapia , Mordeduras de Serpentes/complicações , Mordeduras de Serpentes/fisiopatologia
19.
J Interv Card Electrophysiol ; 14(3): 175-82, 2005 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-16421694

RESUMO

BACKGROUND: A complete line of block (CLOB) in the cavotricuspid isthmus (CTI) is the endpoint of typical atrial flutter ablation. Before CTI block is obtained, a progressive CTI conduction delay due to an incomplete line of block (InLOB) can be difficult to distinguish from CLOB. The purpose of this study was to assess a new simple approach based on the changes in atrio-ventricular (AV) conduction delays during septal and lateral right atrial pacing, to distinguish a CLOB from an InLOB during typical atrial flutter (AFL) ablation. METHODS AND RESULTS: Forty patients who presented an InLOB before a CLOB, and a stable (AV) conduction delay at 600 ms cycle length pacing (when in sinus rhythm), during AFL ablation were included in this study. A 24-pole mapping catheter was positioned so that 2 adjacent dipoles bracketed the targeted CTI line of block (LOB), with proximal dipoles lateral to the LOB and distal dipoles in the coronary sinus. Two pacing sites were lateral (position L1 and L2) and one was septal (position S) to the LOB, with locations L1 and S closest to the LOB. During L1, L2 and S site pacing, the delay between the pacing artefact and the peak of the R wave in a surface ECG (lead II) was measured. We measured the following conduction delays (mean +/- SD in ms), during InLOB versus CLOB: (L1 to R) 320.5 +/- 68.0 versus 367.0 +/- 62.0, p = 0.001; (L2 to R) 333.0 +/- 59.0 versus 338.0 +/- 62.0, p = 0.663, (S to R) 259.4 +/- 51.5 versus 247.1 +/- 55.5, p = 0.987. We calculated the following data during an InLOB versus a CLOB: (L1R-L2R) -12.3 +/- 7 versus 20.2 +/- 12.7, p = 0.001; (L1R-SR) 51.1 +/- 21.5 versus 120.1 +/- 16.6, p < 0.05. The sensitivity, specificity, positive and negative predictive values for CLOB with (L1R-SR > 94 ms) and with (L1R-L2R > 0 ms) were respectively; 100%, 98%, 98% and 100%. CONCLUSIONS: This study establishes that lateral versus septal right atrial pacing sites combined with the measure of AV conduction delay on a surface ECG can be useful to distinguish a CLOB from an InLOB during AFL ablation.


Assuntos
Flutter Atrial/terapia , Estimulação Cardíaca Artificial , Ablação por Cateter , Sistema de Condução Cardíaco/fisiopatologia , Monitorização Intraoperatória/métodos , Cateterismo Cardíaco , Eletrocardiografia , Técnicas Eletrofisiológicas Cardíacas , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento , Valva Tricúspide
20.
Artigo em Inglês | MEDLINE | ID: mdl-26229503

RESUMO

Breast cancer prescreening is carried out prior to the gold standard screening using X-ray mammography and/or ultrasound. Prescreening is typically carried out using clinical breast examination (CBE) or self-breast examinations (SBEs). Since CBE and SBE have high false-positive rates, there is a need for a low-cost, noninvasive, non-radiative, and portable imaging modality that can be used as a prescreening tool to complement CBE/SBE. This review focuses on the various hand-held optical imaging devices that have been developed and applied toward early-stage breast cancer detection or as a prescreening tool via phantom, in vivo, and breast cancer imaging studies. Apart from the various optical devices developed by different research groups, a wide-field fiber-free near-infrared optical scanner has been developed for transillumination-based breast imaging in our Optical Imaging Laboratory. Preliminary in vivo studies on normal breast tissues, with absorption-contrasted targets placed in the intramammary fold, detected targets as deep as 8.8 cm. Future work involves in vivo imaging studies on breast cancer subjects and comparison with the gold standard X-ray mammography approach.

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