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1.
Ann Vasc Surg ; 102: 84-91, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38280485

RESUMO

BACKGROUND: The COVID-19 pandemic has affected the healthcare systems worldwide since the dawn of 2020. In March 2020, the United Kingdom government announced the first national lockdown which severely disturbed all National Health Service (NHS) healthcare elective services. Our aim is to assess the long-term impact of COVID-19 related disruption of NHS elective services on emergency major lower limb amputations (MLLAs). METHODS: Patients' data for emergency MLLA for critical limb-threatening ischemia and diabetic foot infections performed at Aberdeen Royal Infirmary was collected through Trakcare and divided into the control prepandemic group (April 2018-March 2020) and the pandemic group (April 2020-March 2022). The statistical analysis was conducted using the IBM SPSS software (v28.0.1.1 [14]). RESULTS: A total of 358 patients underwent MLLA and 206 (57.5%) of these had diabetes mellitus. There was a 17% increase in the number of urgent referrals and every 1 in 5 of these finally underwent an amputation. There was an increase in the absolute number of Above- and Below-Knee amputations. There was a statistically significant increase by 33% in emergency MLLAs during the pandemic period (P < 0.05). A total of 165 postoperative deaths up to December 2022 were recorded with 30-day mortality rate of 7.26% (n = 26). CONCLUSIONS: NHS vascular management groups should update themselves with evolving technologies to optimize the care provided during future unprecedented times. Furthermore, more effective measures should also be implemented to avoid delayed presentations, which can potentially lead to higher rates of major limb amputations.


Assuntos
COVID-19 , Medicina Estatal , Humanos , Pandemias , Resultado do Tratamento , Controle de Doenças Transmissíveis , Amputação Cirúrgica , Extremidade Inferior/cirurgia , Estudos Retrospectivos
2.
Thorac Cardiovasc Surg ; 72(3): 227-234, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37625455

RESUMO

BACKGROUND: Surgical resection is the gold standard treatment for the management of early-stage lung cancer. Several modifiable factors may significantly influence postoperative morbidity and mortality. We examined the outcomes of patients following lung resection based upon preoperative smoking status to quantify the impact on postoperative outcomes. METHODS: Data from consecutive lung resections from January 1, 2012 to June 11, 2021 were included. Biopsies for interstitial lung disease and resections for emphysematous lung or bullae were excluded. Patients were divided into three cohorts: current smokers (those who smoked within 4 weeks of surgery), ex-smokers (those who stopped smoking prior to 4 weeks leading up to surgery), and nonsmokers (those who have never smoked). Patient's preoperative variables, postoperative complications, length of stay, and mortality were examined. RESULTS: A total of 2,426 patients were included in the study. A total of 502 patients (20.7%) were current smokers, 1,445 (59.6%) were ex-smokers and 479 patients (19.7%) nonsmokers. Of those smoking immediately prior to surgery 36.9% developed postoperative complications. Lower respiratory tract infections (18.1%) and prolonged air leak (17.1%), in particular, were significant higher in smokers. 90-day mortality (5.8%) was higher in the current smokers when compared with ex- and nonsmokers (5.3 and 1%, respectively). Median length of hospital stay, readmissions, and cost of hospital stay was also higher in the current smoker cohort. CONCLUSION: Smoking immediately prior to surgery is associated with an increase in morbidity, mortality, and length of stay. Not only does this have a significant individual impact, but it is also associated with a significant financial burden to the National Health Service.


Assuntos
Neoplasias Pulmonares , Medicina Estatal , Humanos , Resultado do Tratamento , Fumar/efeitos adversos , Complicações Pós-Operatórias/etiologia , Pulmão/cirurgia , Estudos Retrospectivos , Fatores de Risco
3.
Artigo em Inglês | MEDLINE | ID: mdl-37055019

RESUMO

BACKGROUND: Body mass index (BMI) has been shown to be an independent predictor of survival following lung resection surgery. This study aimed to quantify the short- to midterm impact of abnormal BMI on postoperative outcomes. METHODS: Lung resections at a single institution were examined between 2012 and 2021. Patients were divided into low BMI (<18.5), normal/high BMI (18.5-29.9), and obese BMI (>30). Postoperative complications, length of stay, and 30- and 90-day mortality were examined. RESULTS: A total of 2,424 patients were identified. Of these patients, 2.6% (n = 62) had a low BMI, 67.4% (n = 1,634) had a normal/high BMI, and 30.0% (n = 728) had an obese BMI. Overall postoperative complications were higher in the low BMI group (43.5%) when compared with normal/high (30.9%) and obese BMI group (24.3%) (p = 0.0002). Median length of stay was significantly higher in the low BMI group (8.3 days) compared with 5.2 days in the normal/high and obese BMI groups (p < 0.0001). Ninety-day mortality was higher in the low (16.1%) compared with the normal/high (4.5%) and obese BMI groups (3.7%) (p = 0.0006). Subgroup analysis of the obese cohort did not elucidate any statistically significant differences in overall complications in the morbidly obese. Multivariate analysis determined that BMI is an independent predictor of reduced postoperative complications (odds ratio [OR], 0.96; 95% confidence interval [CI], 0.94-0.97; p < 0.0001) and 90-day mortality (OR, 0.96; 95% CI, 0.92-0.99; p = 0.02). CONCLUSION: Low BMI is associated with significantly worse postoperative outcomes and an approximate fourfold increase in mortality. In our cohort, obesity is associated with reduced morbidity and mortality following lung resection surgery, confirming the existence of the obesity paradox.

4.
J Assoc Physicians India ; 72(1): 104-105, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38736083

RESUMO

Esophageal tuberculosis (TB) is a rare manifestation of extrapulmonary TB, accounting for <0.2% of all TB cases. Esophageal TB most commonly presents with dysphagia, odynophagia, retrosternal pain, and systemic symptoms like decreased appetite, loss of weight, and low-grade fever as associated or other presentations. We report a similar case recently encountered as an elderly male patient presented with chronic dysphagia to solids, loss of appetite, and significant loss of weight. Radiological and endoscopy pictures looked like esophageal cancer with histopathological examination (twice) negative for the same. Diagnosis of esophageal TB was confirmed by GeneXpert Ultra of biopsy sample and histopathological examination was suggestive of granulomatous esophagitis. The patient improved on 6 months antitubercular therapy. The unique aspect of this case was how the lesion mimicked an esophageal carcinoma on imaging which posed a diagnostic challenge.


Assuntos
Antituberculosos , Humanos , Masculino , Antituberculosos/uso terapêutico , Tuberculose Gastrointestinal/diagnóstico , Tuberculose Gastrointestinal/tratamento farmacológico , Diagnóstico Diferencial , Idoso , Transtornos de Deglutição/etiologia , Neoplasias Esofágicas/diagnóstico , Doenças do Esôfago/diagnóstico
5.
Surg Endosc ; 37(5): 3410-3418, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36717426

RESUMO

BACKGROUND: Over-the-scope clips (OTSC), both conventional and Stentfix, are believed to anchor the self-expanding metal (SEMS) and prevent migration. We aimed to systematically study the efficacy of endoscopic OTSC fixation of SEMS in prevention of migration. METHODS: We searched electronic databases from inception to November 11, 2022 to identify studies reporting outcomes of OTSC fixation of metal stents. The primary outcome was to calculate the pooled migration rates following OTSC anchorage of SEMS and to compare it with controls (SEMS without any fixation). The secondary outcomes include technical and clinical success of OTSC anchorage of SEMS. Random effect models were used to determine pooled rates of migration and technical as well as clinical success rates of OTSC anchorage of metal stents. RESULTS: A total of 9 studies were included. The pooled rate of migration following OTSC anchorage of SEMS was 0.10 (95%CI, 0.04-0.20, I2 = 43%). The pooled rate of migration following OTSC anchorage of esophageal SEMS was 0.08 (95%CI, 0.04-0.15, I2 = 0%). The pooled risk ratio of SEMS migration following OTSC Stentfix was lower as compared to no fixation of SEMS [RR = 0.24 (95%CI,0.13- 0.43, I2 = 0)]. The pooled technical success rate of OTSC fixation following SEMS was 0.98 (95%CI, 0.81-1.00, I2 = 0%). The pooled clinical success rate of OTSC fixation following SEMS was 0.79 (95%CI, 0.64-0.88, I2 = 56%). All studies had valid and reliable methods to diagnose migration, technical and clinical success. CONCLUSIONS: The use of OTSC clips (conventional or Stentfix) for anchorage had a lower risk of migration of metal stents than no fixation. Future studies should look into prospective multicenter studies on their use to prevent the migration of SEMS.


Assuntos
Stents Metálicos Autoexpansíveis , Humanos , Estudos Prospectivos , Stents , Esofagoscopia/métodos , Resultado do Tratamento , Estudos Retrospectivos
6.
Alzheimers Dement ; 19(6): 2469-2478, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-36573020

RESUMO

INTRODUCTION: With the rising proportion of the elderly in India, the burden of neuropsychiatric conditions and cognitive impairment is escalating. METHODS: Baseline data of cognitively healthy subjects ≥45 years of age, from two longitudinal, aging cohorts in rural (n = 3262) and urban (n = 693) India, were used to calculate prevalence of depression, early-life stressful events, stroke, head injury, and cognitive impairment. RESULTS: Depression prevalence was significantly higher in rural than urban subjects, with female preponderance in both groups. Early life stressor (parental death) and head injury were significantly more common in rural than in urban India, whereas stroke was more in urban India. There was no significant difference in overall prevalence of cognitive impairment between the rural and urban cohorts; however, women had higher prevalence than men in rural, whereas this was reverse in urban subjects. Depression and stroke were significantly associated with cognitive impairment in the rural cohort. DISCUSSION: Longitudinal assessment of these neuropsychiatric conditions, with parallel cognitive monitoring, will help identify their causal relationship with dementia.


Assuntos
Disfunção Cognitiva , Traumatismos Craniocerebrais , Acidente Vascular Cerebral , Masculino , Humanos , Feminino , Idoso , Prevalência , Fatores de Risco , População Urbana , Disfunção Cognitiva/epidemiologia , População Rural , Índia/epidemiologia , Envelhecimento
7.
Med J Armed Forces India ; 79(5): 597-600, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37719905

RESUMO

Crigler-Najjar is a rare genetic autosomal recessive disorder caused by deficiency of enzyme Uridine 5-Diphosphate Glucuronosyl Transferase (UDP-GT). We report the case of a 24-year-old female with two consecutive pregnancies with a high level of total bilirubin level of 15.1 mg/dl and a direct bilirubin level of 0.8 mg/dl during the first pregnancy. As she was diagnosed case of Crigler Najjar type 2, she was on phenobarbitone 60 mg daily. With careful monitoring, she continued with the same dose. We concluded that even with high bilirubin level (15.1 mg/dl) in pregnancy, no adverse effects to the baby and mother were seen.

8.
Med J Armed Forces India ; 79(Suppl 1): S267-S269, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38144667

RESUMO

Colonic lipomas are benign adipose tumors and are mostly asymptomatic. They may cause symptoms when their size becomes more than 2 cm. Giant colonic lipoma (GCL) is a rare finding in endoscopy which presents with or without macroscopic ulceration and may lead to iron deficiency anaemia (IDA). The choice of treatment of symptomatic large colonic lipomas has been controversial. Here we are presenting a case of GCL presenting with occult bleeding causing iron deficiency anaemia (IDA). It was removed endoscopically using a combination of noradrenaline, endoloop ligation, and snare cautery technique (modified hybrid technique). Successful removal of the GCL lead to the resolution of IDA. This case report highlights that even GCL can be removed endoscopically, thus surgery can be prevented. Clinical Significance: GCL is an unusual cause of anemia. Modified hybrid endoscopic removal technique improves safety.

9.
Indian J Med Res ; 156(3): 484-499, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-36751745

RESUMO

Background & objectives: Coronavirus disease 2019 (COVID-19) affects respiratory, gastrointestinal, cardiovascular and other systems disease. Studies describing liver involvement and liver function test (LFT) abnormalities are sparse from our population. This study was undertaken to estimate the LFT abnormalities in patients with COVID-19 in a tertiary care set up in India. Methods: In this retrospective study conducted at a tertiary care centre in Mumbai, India, all consecutive patients with proven COVID-19 by reverse transcriptase-PCR from March 23 to October 31, 2020 were enrolled. Of the 3280 case records profiled, 1474 cases were included in the study. Clinical characteristics, biochemical parameters and outcomes were recorded. Results: Overall 681 (46%) patient had deranged LFTs. Hepatocellular type of injury was most common (93%). Patients with deranged LFTs had more probability of developing severe disease (P<0.001) and mortality (P<0.001). Advanced age (P<0.001), male gender (P<0.001), diabetes mellitus (P<0.001), lower oxygen saturation levels at admission (P<0.001), higher neutrophil-lymphocyte ratio (P<0.001), history of diabetes mellitus and cirrhosiss were associated with deranged LFTs. Acute liver injury was seen in 65 (4.3%) cases on admission and 57 (3.5%) cases during hospital stay. On multivariate analysis for predicting mortality, age >60 yr serum creatinine >2 mg%, PaO2/FiO2 ratio ≤200 and raised AST >50 IU/l (OR: 2.34, CI: 1.59-3.48, P<0.001) were found to be significant. Interpretation & conclusions: In COVID-19, LFT abnormalities were common, and derangement increased as severity progressed. The presence of deranged LFT worsens the clinical outcome and predicts in-hospital mortality.


Assuntos
COVID-19 , Humanos , Masculino , Testes de Função Hepática , SARS-CoV-2 , Centros de Atenção Terciária , Estudos Retrospectivos
10.
Anal Chem ; 93(10): 4521-4527, 2021 03 16.
Artigo em Inglês | MEDLINE | ID: mdl-33655752

RESUMO

Clinicians require simple quantitative tools for the detection of homogentisic acid in alkaptonuria patients, a rare inherited disorder of amino acid metabolism. In this study, we report a whole-cell biosensor for homogentisic acid to detect alkaptonuria disease through the expression of green fluorescence protein. The assay system utilizes a promoter sequence (hmgA) isolated from the Pseudomonas aeruginosa genome. To increase the sensitivity, the sensor module harboring phmgA::GFP was further transformed into various transposon mutants debilitated in steps involved in the metabolism of phenylalanine and tyrosine via homogentisic acid as a central intermediate. The proposed biosensor was further checked for analytical features such as sensitivity, selectivity, linearity, and precision for the quantification of homogentisic acid in spiked urine samples. The limit of detection for the developed biosensor was calculated to be 3.9 µM, which is comparable to that of the various analytical techniques currently in use. The sensor construct showed no interference from all of the amino acids and its homolog molecules. The accuracy and precision of the proposed biosensor were validated using high-performance liquid chromatography (HPLC) with satisfactory results.


Assuntos
Alcaptonúria , Técnicas Biossensoriais , Alcaptonúria/diagnóstico , Alcaptonúria/genética , Cromatografia Líquida de Alta Pressão , Ácido Homogentísico , Humanos , Tirosina
11.
Indian J Crit Care Med ; 25(2): 228-230, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33707905

RESUMO

Thiopurines by their glucocorticoid-sparing property help in maintaining remission for patients with inflammatory bowel disease (IBD), when glucocorticoids are reduced and withdrawn. However, due to bone marrow suppression, it cannot be used in various conditions where it is indicated. A 17-year-old patient presented with pancytopenia with neutropenic sepsis and alopecia after 3 weeks of starting azathioprine for her underlying Crohn's disease. Thiopurine S-methyltransferase (TPMT;*2, *3A, *3C) analysis resulted in a wild-type genotype, whereas homozygous Nudix hydrolase 15 (NUDT 15 C415T) variant was positive. Azathioprine was stopped immediately, and she was started on broad-spectrum antibiotics that led to some clinical improvements initially, but later on, the patient developed intestinal obstruction along with postoperative complications leading to death. In this report, we highlight a case of serious hematological toxicity associated with azathioprine use in a patient with Crohn's disease with homozygous NUDT 15 variant, thus favoring the implementation of a pharmacogenomic approach before starting azathioprine, particularly in the Asian population. HOW TO CITE THIS ARTICLE: Debnath P, Nair S, Jain S, Udgirkar S, Contractor Q, Rathi P. Thiopurine-induced Myelosuppression with Severe Sepsis in a Patient with Crohn's Disease: A Case Report. Indian J Crit Care Med 2021;25(2):228-230. PRIOR PRESENTATION OF CASE REPORT AT PROFESSIONAL MEETING: The case was presented in abstract form at the American College of Gastroenterology Annual Scientific Meeting, held at San Antonio, TX, USA 2019. INFORMED CONSENT FOR PUBLICATION OF CASE DETAILS: Obtained from patient's relatives.

12.
Biomacromolecules ; 21(1): 188-198, 2020 01 13.
Artigo em Inglês | MEDLINE | ID: mdl-31549825

RESUMO

The advancement of 3D printing technologies in the fabrication of degradable scaffolds for tissue engineering includes, from the standpoint of the polymer chemists, an urgent need to develop new materials that can be used as ink and are suitable for medical applications. Here, we demonstrate that a copolymer of ε-caprolactone (CL) with low amounts of p-dioxanone (DX) (15 mol %) is a degradable and printable material that suits the requirements of melt extrusion 3D printing technologies, including negligible degradation during thermal processing. It is therefore a potential candidate for soft tissue regeneration. The semicrystalline CL/DX copolymer is processed at a lower temperature than a commercial polycaprolactone (PCL), shaped as a filament for melt extrusion 3D printing and as porous and pliable scaffolds with a gradient design. Scaffolds have Young's modulus in the range of 60-80 MPa, values suitable for provision of structural support for damaged soft tissue such as breast tissue. SEM and confocal microscope indicate that the CL/DX copolymer scaffolds support adipose stem cell attachment, spreading, and proliferation.


Assuntos
Tecido Adiposo/fisiologia , Células-Tronco Mesenquimais/citologia , Polímeros/química , Impressão Tridimensional , Alicerces Teciduais , Materiais Biocompatíveis , Proliferação de Células , Dioxanos/química , Módulo de Elasticidade , Humanos , Teste de Materiais , Poliésteres/química , Polímeros/síntese química , Porosidade , Regeneração/fisiologia , Engenharia Tecidual
13.
Biomacromolecules ; 21(2): 388-396, 2020 02 10.
Artigo em Inglês | MEDLINE | ID: mdl-31566357

RESUMO

Various 3D printing techniques currently use degradable polymers such as aliphatic polyesters to create well-defined scaffolds. Even though degradable polymers are influenced by the printing process, and this subsequently affects the mechanical properties and degradation profile, degradation of the polymer during the process is not often considered. Degradable scaffolds are today printed and cell-material interactions evaluated without considering the fact that the polymer change while printing the scaffold. Our methodology herein was to vary the printing parameters such as temperature, pressure, and speed to define the relationship between printability, polymer microstructure, composition, degradation profile during the process, and rheological behavior. We used high molecular weight medical-grade (co)polymers, poly(l-lactide-co-ε-caprolactone) (PCLA), poly(l-lactide-co-glycolide) (PLGA), and poly(d,l-lactide-co-glycolide) (PDLGA), with l-lactide content ranging from 25 to 100 mol %, for printing in an extrusion-based printer (3D Bioplotter). Optical microscopy confirmed that the polymers were printable at high resolution and good speed, until a certain degree of degradation. The results show also that printability can not be claimed just by optimizing printing parameters and highlight the importance of a careful analysis of how the polymer's structure and properties vary during printing. The polymers thermally decomposed from the first processing minute and caused a decrease in the average block length of the lactide blocks in the copolymers and generated lower crystallinity. Poly(l-lactide) (PLLA) and PCLA are printable at a higher molecular weight, less degradation before printing was possible, compared to PLGA and PDLGA, a result explained by the higher complex viscosity and more elastic polymeric melt of the copolymer containing glycolide (GA) and lactide (LA). In more detail, copolymers comprised of LA and ε-caprolactone (CL) formed lower molecular weight compounds over the course of printing, while the PLGA copolymer was more susceptible to intermolecular transesterification reactions, which do not affect the overall molecular weight, but cause changes in the copolymer microstructure. This results in a longer printing time for PLGA than PLLA and PCLA.


Assuntos
Materiais Biocompatíveis/química , Polímeros/química , Impressão Tridimensional , Varredura Diferencial de Calorimetria , Cromatografia em Gel , Espectroscopia de Ressonância Magnética , Peso Molecular , Poliésteres/química , Copolímero de Ácido Poliláctico e Ácido Poliglicólico/química , Termogravimetria
14.
J Assoc Physicians India ; 67(10): 83-84, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31571463

RESUMO

Cronkhite-Canada syndrome (CCS)is a rare non-hereditary hamartomatous polyposis syndrome of unknown aetiology. It is characterized by diffuse gastrointestinal polyps, dystrophic nail changes, alopecia, cutaneous hyperpigmentation, chronic diarrhoea, anorexia and hypogeusia. It is associated with a high incidence of gastrointestinal malignancies, mortality and morbidity. Early clinical suspicion and treatment is important. We report an elderly male with CCS who showed clinical and endoscopic improvement with long term corticosteroid therapy.


Assuntos
Diarreia , Hiperpigmentação , Polipose Intestinal , Idoso , Alopecia , Humanos , Masculino , Síndrome
15.
J Assoc Physicians India ; 67(10): 39-43, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31571451

RESUMO

INTRODUCTION AND AIM: It is difficult to distinguish acute hepatitis B (AVH-B) from chronic hepatitis B with an acute exacerbation (CHB-AE) in patients whose prior history of HBV infection is unknown. The present study aimed to screen laboratory parameters at presentation to discriminate between these two conditions. MATERIALS AND METHODS: A prospective study was conducted in patients presenting clinically as AVH-B without known previous chronic hepatitis B status. Patients were divided into AVH-B and CHB-AE at end of six months follow up. Clinical and laboratory profiles were compared between these two groups at presentation. RESULTS: There was no significant difference in clinical presentation and risk factors profile in patients of both the groups. Mean age of presentation in AVH-B was 31.8 ± 14.9 years while, 47.2 ±17.3 years in CHB-AE group (p=0.005). Mean IgM anti-HBc levels were higher in AVH-B than in the CHB-AE group (p=0.001). Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of IgM anti-HBc [>12.14 S/CO (Sample/Cut-off )] for diagnosis of AVH-B was 76.9%, 71.4%, 76.9% and 71.4 % respectively. Quantitative HBV DNA levels were significantly higher in CHB-AE group than in AVH-B group (p=0.015). Sensitivity, specificity, PPV and NPV of HBV DNA ( > 15390 IU/ml) for diagnosis of CHB-AE was 78.6%, 46.2%, 44% and 80% respectively. CONCLUSION: A high percentage of patients with apparent AVH-B might be cases of CHB-AE. Elderly patient (mean 47.2 years), high titers of HBV DNA (>15390 IU/ mL) and low IgM anti-HBc titer (<12.14 S/CO) favours CHB-AE over AVH-B.


Assuntos
Hepatite B , Adolescente , Adulto , Idoso , Vírus da Hepatite B , Hepatite B Crônica , Humanos , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos , Adulto Jovem
16.
AAPS PharmSciTech ; 20(5): 203, 2019 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-31139965

RESUMO

D-α-Tocopheryl polyethylene glycol succinate (TPGS), a polyethylene glycol condensate, is a biologically important nonionic amphiphile. In this study, we report on aqueous solution behavior of TPGS with a focus on its clouding, surface activity, micellar characteristics, and solubilization capacity for a model hydrophobic drug, carbamazepine (CBZ). Micelles were characterized by dynamic light and small-angle neutron scattering studies as a function of temperature, salt addition, and CBZ solubilization. TPGS showed a cloud point of 78°C and possessed good surface activity (as observed from surface tension reduction and adsorption parameters). The critical micelle concentration (CMC), obtained from surface tension and fluorescence studies, was 0.02 mM. Scattering studies showed formation of stable micelles (average diameter-12 nm), exhibiting no significant changes in size upon salt addition (up to 1 M NaCl), CBZ incorporation (up to 5 mM), and temperature increase (40°C). Micelles in 5 wt% TPGS showed about twentyfold enhancement in CBZ solubility. Considering the remarkable CBZ solubilization and its positioning in the core, we suggest that the formulation can be exploited as a sustained delivery vehicle.


Assuntos
Carbamazepina/química , Portadores de Fármacos/química , Micelas , Temperatura , Vitamina E/química , Anticonvulsivantes/química , Anticonvulsivantes/farmacocinética , Carbamazepina/farmacocinética , Relação Dose-Resposta a Droga , Portadores de Fármacos/farmacocinética , Eletrólitos/química , Eletrólitos/farmacocinética , Excipientes/química , Excipientes/farmacocinética , Interações Hidrofóbicas e Hidrofílicas , Espalhamento a Baixo Ângulo , Solubilidade , Vitamina E/farmacocinética
17.
Mater Des ; 140: 332-344, 2018 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-29391661

RESUMO

Toward minimizing bacterial colonization of surfaces, we present a one-step etching technique that renders aluminum alloys with micro- and nano-scale roughness. Such a multi-scale surface topography exhibited enhanced antibacterial effect against a wide range of pathogens. Multi-scale topography of commercially grade pure aluminum killed 97% of Escherichia coli and 28% of Staphylococcus aureus cells in comparison to 7% and 3%, respectively, on the smooth surfaces. Multi-scale topography on Al 5052 surface was shown to kill 94% of adhered E. coli cells. The microscale features on the etched Al 1200 alloy were not found to be significantly bactericidal, but shown to decrease the adherence of S. aureus cells by one-third. The fabrication method is easily scalable for industrial applications. Analysis of roughness parameters determined by atomic force microscopy revealed a set of significant parameters that can yield a highly bactericidal surface; thereby providing the design to make any surface bactericidal irrespective of the method of fabrication. The multi-scale roughness of Al 5052 alloy was also highly bactericidal to nosocomial isolates of E. coli, K. pneumoniae and P. aeruginosa. We envisage the potential application of engineered surfaces with multi-scale topography to minimize the spread of nosocomial infections.

18.
Nanotechnology ; 28(2): 025201, 2017 Jan 13.
Artigo em Inglês | MEDLINE | ID: mdl-27905322

RESUMO

The need of today's highly integrated electronic devices, especially working in the GHz frequencies, is to protect them from unwanted interference from neighbouring devices. Hence, lightweight, flexible, easy to process microwave absorbers were designed here by dispersing conductive multiwall carbon nanotubes (MWNTs) and silver nanoparticles decorated onto two-dimensional graphene sheets (rGO@Ag) in poly(ε-caprolactone) (PCL). In this study, we have shown how dielectric losses can be tuned in the nanocomposites by rGO@Ag nano-hybrid; an essential criterion for energy dissipation within a material resulting in effective shielding of the incoming electromagnetic (EM) radiation. Herein, the conducting pathway for nomadic charge transfer in the PCL matrix was established by MWNTs and the attenuation was tuned by multiple scattering due to the large specific surface area of rGO@Ag. The latter was possible because of the fine dispersion state of the Ag nanoparticles which otherwise often agglomerate if mixed separately. The effect of individual nanoparticles on microwave attenuation was systematically assessed here. It was observed that this strategy resulted in strikingly enhanced microwave attenuation in PCL nanocomposites in contrast to addition of individual particles. For instance, PCL nanocomposites containing both MWNTs and rGO@Ag manifested in a SET of -37 dB and, interestingly, at arelatively smaller fraction. The SE shown by this particular composite makes it a potential candidate for many commercial applications as reflected by its exceptional absorption capability (91.3%).

19.
J Assoc Physicians India ; 64(9): 95-96, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-27762530

RESUMO

Rare complications have been documented due to inadvertent intravascular administration of penicillin such as Nicolau syndrome (lipoatrophy), transverse myelitis, injury to sciatic nerve as well as Hoigne syndrome (transient central nervous system dysfunction).1 We present a case report where a young male developed Nicolau syndrome and transverse myelitis after receiving benzathine penicillin injection.


Assuntos
Antibacterianos/efeitos adversos , Mielite Transversa/induzido quimicamente , Síndrome de Nicolau/etiologia , Penicilina G Benzatina/efeitos adversos , Antibacterianos/administração & dosagem , Humanos , Injeções Intramusculares/efeitos adversos , Masculino , Penicilina G Benzatina/administração & dosagem , Adulto Jovem
20.
Int J Surg Case Rep ; 115: 109312, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38280345

RESUMO

INTRODUCTION: An Epiploic Hernia is an extremely rare type of abdominal hernia with <0.1 % incidence where the bowel or other intra-abdominal contents herniate through the Foramen of Winslow. A case of an Epiploic hernia in a middle-aged female is presented here. PRESENTATION OF CASE: A woman in her 60s was admitted to a tertiary level hospital with severe right sided intermittent upper abdominal pain associated with nausea, bloating and constipation. The symptoms were thought to be due to biliary colic and managed conservatively. Since the symptoms persisted and a computed tomography scan of abdomen was organized. CT scan showed that the caecum was in the upper left quadrant. A laparoscopy was performed and demonstrated that her right colon was mobile herniating through the Foramen of Winslow into the lesser sac. The hernia was reduced, and the bowel was viable. The patient was discharged with no complications. DISCUSSION: There have been case reports of small bowel as the content of the hernia with lesser occurrences of caecum, ascending colon, transverse colon, gall bladder, omentum, or Meckel's diverticulum. A caecal herniation through the Foramen of Winslow is reported only with an incidence of 0.02 %. <10 % of these Epiploic hernias are diagnosed preoperatively making it a potentially life-threatening condition if not treated promptly due to high risk of bowel strangulation and mortality of up to 50 %. CONCLUSION: A high index of suspicion is needed for the diagnosis of this internal hernia and radiological investigation is fundamental in making this diagnosis for allowing prompt surgical treatment.

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