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1.
Indian J Crit Care Med ; 28(6): 587-594, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-39130394

RESUMO

Aim and background: Sarcopenia is a substantial contributor to intensive care unit (ICU)-acquired weakness and is associated with significant short- and long-term outcomes. It can, however, be mitigated by providing appropriate nutrition. Indirect calorimetry (IC) is believed to be the gold standard in determining caloric targets in the dynamic environment of critical illness. We conducted this study to compare the effect of IC vs weight-based (25 kcal/kg/day) feeding on quadriceps muscle thickness (QMT) by ultrasound in critically ill patients. Materials and methods: A prospective study was conducted on 60 mechanically ventilated patients randomized to two groups [weight-based equation (WBE) group or the IC group] in medical ICU after obtaining institutional ethics committee approval, and fed accordingly. The right QMT measurement using ultrasound and caloric targets were documented on day 1, 3 and 7 and analyzed statistically. The IC readings were obtained from the metabolic cart E-COVX ModuleTM. Results: The baseline demographics, APACHE-II, NUTRIC score, and SOFA scores on day 1, 3, and 7 were comparable between the two groups. The resting energy expenditure (REE) obtained in the IC group was significantly less than the WBE energy targets and the former were fed with significantly less calories. A significantly less percent reduction of QMT in the IC group compared with the WBE group was observed from day 1 to day 3, day 3 to day 7, and day 1 to day 7. Conclusion: From our study, we conclude that IC-REE-based nutrition is associated with lesser reduction in QMT and lesser calories fed in critically ill mechanically ventilated patients compared from WBE. CTRI registration-CTRI/2023/01/049119. How to cite this article: Chandrasekaran A, Pal D, Harne R, Patel SJ, Jagadeesh KN, Pachisia AV, et al. Comparison between Effect of Indirect Calorimetry vs Weight-based Equation (25 kcal/kg/day)-guided Nutrition on Quadriceps Muscle Thickness as Assessed by Bedside Ultrasonography in Medical Intensive Care Unit Patients: A Randomized Clinical Trial. Indian J Crit Care Med 2024;28(6):587-594.

2.
Indian J Crit Care Med ; 28(9): 859-865, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39360210

RESUMO

Background: Regional citrate anticoagulation (RCA) has emerged as a treatment modality that reduces bleeding risk and filter clotting. With initial experience of using RCA with continuous renal replacement therapy (CRRT), we have formulated a working protocol based on published literature. Objective: The study aimed to evaluate the protocol for routine use of RCA during CRRT requiring anticoagulation and evaluation of filter life. Methodology: It is a single-center, open-label, prospective, non-randomized, non-interventional, single-arm, observational study conducted at a tertiary care hospital between September 2022 and July 2023. All adult patients with acute kidney injury (AKI) or hyperammonemia requiring CRRT and necessitating the use of anticoagulation were enrolled in the study. The study used Prisma Flex M100 AN 69 dialyzer on Prisma Flex (Baxter) CRRT machines during continuous venovenous hemodiafiltration (CVVHDF). The targeted CRRT dose in all the study patients was 25-30 mL/kg/hour. Based on the published literature, we have developed a working protocol (Appendix 1) for managing patients on CRRT using RCA. Results: A total of 159 patients were analyzed for the study. The median [interquartile range (IQR)] filter life using RCA was 30 (12-55) hours. Filter clotting was observed in 33.3% of patients. Citrate accumulation was present in 52.25% of patients, but no CRRT was discontinued as citrate accumulation resolved after following the corrective steps in the protocol. None of the patients had citrate toxicity. Chronic liver disease (CLD) (p ≤ 0.001) and those who were post-living donor liver transplant recipients (p = 0.004) had a statistically significant increase in citrate accumulation. Also, patients who had higher lactate at baseline (6 hours post-CRRT initiation), had a higher chance of citrate accumulation. Conclusion: Our RCA protocol provides a safe approach to regional anticoagulation during CRRT in critically ill patients. How to cite this article: Pachisia AV, Kumar GP, Harne R, Jagadeesh KN, Patel SJ, Pal D, et al. Protocolized Regional Citrate Anticoagulation during Continuous Renal Replacement Therapy: A Single Center Experience. Indian J Crit Care Med 2024;28(9):859-865.

3.
J Perianesth Nurs ; 38(3): 483-487, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-36635123

RESUMO

PURPOSE: This qualitative analysis of interviews with surgical patients who received a brief perioperative psychological intervention, in conjunction with standard medical perioperative care, elucidates patient perspectives on the use of pain self-management skills in relation to postoperative analgesics. DESIGN: This study is a secondary analysis of qualitative data from a randomized controlled trial. METHODS: Participants (N = 21) were rural-dwelling United States Military Veterans from a mixed surgical sample who were randomized to receive a manual-based, telephone-based Perioperative Pain Self-management intervention consisting of a total of four pre- and postoperative contacts. Semi-structured qualitative interviews elicited participant feedback on the cognitive-behavioral intervention. Data was analyzed by two qualitative experts using MAXQDA software. Key word analyses focused on mention of analgesics in interviews. FINDINGS: Interviews revealed a dominant theme of ambivalence towards postoperative use of opioids. An additional theme concerned the varied ways acquiring pain self-management skills impacted postoperative opioid (and non-opioid analgesic) consumption. Participants reported that employment of pain self-management strategies reduced reliance on pharmacology for pain relief, prolonged the time between doses, took the "edge off" pain, and increased pain management self-efficacy. CONCLUSIONS: Perioperative patient education may benefit from inclusion of teaching non-pharmacologic pain self-management skills and collaborative planning with patients regarding how to use these skills in conjunction with opioid and non-opioid analgesics. Perianesthesia nurses may be in a critical position to provide interdisciplinary postoperative patient education that may optimize postoperative pain management while minimizing risks associated with prolonged opioid use.


Assuntos
Analgésicos não Narcóticos , Transtornos Relacionados ao Uso de Opioides , Veteranos , Humanos , Veteranos/psicologia , Dor Pós-Operatória/tratamento farmacológico , Analgésicos , Analgésicos Opioides , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico
4.
Indian J Public Health ; 63(4): 377-379, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-32189661

RESUMO

The emergence of drug-resistant tuberculosis (DR-TB) has become a significant health problem in India. Delays in diagnosis and treatment initiation are frequently observed among patients with DR-TB, resulting in an increased risk of disease complications and high mortality and pretreatment lost to follow-up rates. To understand the factors associated with delays between the diagnosis and treatment, the study was carried out in Ahmedabad Municipal Corporation Area. A total of 177 DR-TB patients diagnosed in the year 2014 who had a delay in the initiation of treatment, and 23 initial defaulters were studied using a structured questionnaire. Fifty-four DOTS providers were also interviewed. Of 177 patients, 62.15% initiated treatment between 7 and 15 days and nearly 12% of them started the treatment after a month. The median duration of delay was 12 days (range: 8-144 days and interquartile range: 9-20 days). The most common reason for the delay in the initiation and initial default was the social and personal factors (48.80%), and in 34 (20%) of the patients, the delay was attributed to the effect of the previous treatment.


Assuntos
Antituberculosos/uso terapêutico , Diagnóstico Tardio , Tuberculose Resistente a Múltiplos Medicamentos/tratamento farmacológico , Adolescente , Adulto , Diagnóstico Tardio/estatística & dados numéricos , Feminino , Humanos , Índia , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Inquéritos e Questionários , Fatores de Tempo , Tuberculose Resistente a Múltiplos Medicamentos/diagnóstico , Adulto Jovem
5.
Crit Care Med ; 45(9): e980-e984, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28682836

RESUMO

OBJECTIVE: Patients with pulmonary hypertension and right heart failure have a high risk of clinical deterioration and death during or soon after endotracheal intubation. The effects of sedation, hypoxia, hypoventilation, and changes in intrathoracic pressure can lead to severe hemodynamic instability. In search for safer approach to endotracheal intubation in this cohort of patients, we evaluate the safety and feasibility of an alternative intubation technique. DATA SOURCES: Retrospective data analysis. STUDY SELECTION: Two medical ICUs in large university hospitals in the United States. DATA EXTRACTION: We report a case series of nine nonconsecutive patients with compromised right heart function, pulmonary hypertension, and severe acute hypoxemic respiratory failure who underwent endotracheal intubation with a novel technique combining awake bronchoscopic intubation supported with nasally delivered noninvasive positive pressure ventilation or high-flow nasal cannula. DATA SYNTHESIS: All patients were intubated in the first attempt without major complications and eight patients (88%) were alive 24 hours after intubation. Systemic hypotension was the most frequent complication following the procedure. CONCLUSIONS: Awake bronchoscopic intubation supported with a noninvasive positive pressure delivery systems may be feasible alternative to standard direct laryngoscopy approach. Further studies are needed to better assess its safety and applicability.


Assuntos
Broncoscopia/métodos , Insuficiência Cardíaca/complicações , Hipertensão Pulmonar/complicações , Intubação Intratraqueal/métodos , Insuficiência Respiratória/complicações , Insuficiência Respiratória/terapia , Hospitais Universitários , Humanos , Unidades de Terapia Intensiva , Estudos Retrospectivos , Vigília
6.
J Am Acad Dermatol ; 73(6): 897-908; quiz 909-10, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26568335

RESUMO

Leishmaniasis is endemic in 98 countries and territories, with 1.2 million new cases per year, making it a worldwide concern. The deadly visceral form is a leading cause of death from tropical parasitic infections, second only to malaria. Leishmaniasis appears to be increasing in many countries because of extended urbanization. The disease reservoir includes small mammals; parasite transmission occurs via bite of the female phlebotomine sandfly. Disease manifestations vary and largely depend upon the Leishmania species acquired. It may be first evident with a range of findings-from a localized cutaneous ulcer to diffuse painless dermal nodules-or, in the mucocutaneous form, ulceration of the oropharynx. In the potentially deadly visceral form, the internal organs and bone marrow are affected.


Assuntos
Leishmania donovani/isolamento & purificação , Leishmaniose Cutânea/diagnóstico , Leishmaniose Cutânea/epidemiologia , Leishmaniose Visceral/diagnóstico , Leishmaniose Visceral/epidemiologia , Animais , Antiprotozoários/uso terapêutico , Progressão da Doença , Doenças Endêmicas , Feminino , Humanos , Leishmaniose Cutânea/tratamento farmacológico , Leishmaniose Mucocutânea/diagnóstico , Leishmaniose Mucocutânea/tratamento farmacológico , Leishmaniose Mucocutânea/epidemiologia , Leishmaniose Visceral/tratamento farmacológico , Masculino , Prevalência , Prognóstico , Medição de Risco , Clima Tropical
7.
J Am Acad Dermatol ; 73(6): 911-26; 927-8, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26568336

RESUMO

The diagnosis of leishmaniasis can be challenging because it mimics both infectious and malignant conditions. A misdiagnosis may lead to an unfavorable outcome. Using culture, histologic, and/or polymerase chain reaction study results, a diagnosis of leishmaniasis can be established and treatment initiated. Appropriate management requires an accurate diagnosis, which often includes identification of the specific etiologic species. Different endemic areas have varying sensitivities to the same medication, even within individual species. Species identification may be of practical value, because infections with select species have a substantial risk of visceral involvement. In addition, HIV and otherwise immunocompromised patients with leishmaniasis have a propensity for diffuse cutaneous leishmaniasis. For most New World Leishmania species, parenteral antimonial drugs remain the first line of therapy, while Old World species are easily treated with physical modalities. Historically, live organism vaccination has been used and is effective in preventing leishmaniasis, but results in an inoculation scar and an incubation period that may last for years. A more effective method of vaccination would be welcome.


Assuntos
Doenças Endêmicas , Hospedeiro Imunocomprometido , Leishmania/isolamento & purificação , Leishmaniose Cutânea/epidemiologia , Leishmaniose Cutânea/patologia , Anfotericina B/administração & dosagem , Animais , Antiprotozoários/uso terapêutico , Biópsia por Agulha , Quimioterapia Combinada , Feminino , Humanos , Imuno-Histoquímica , Incidência , Leishmaniose Cutânea/diagnóstico , Leishmaniose Cutânea/tratamento farmacológico , Leishmaniose Mucocutânea/tratamento farmacológico , Leishmaniose Mucocutânea/epidemiologia , Leishmaniose Mucocutânea/patologia , Masculino , Prognóstico , Medição de Risco , Resultado do Tratamento , Clima Tropical
8.
Indian J Tuberc ; 71(1): 19-26, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38296385

RESUMO

INTRODUCTION: Counselling sessions based on the health behaviour module for patients on TB treatment may help improve the level of understanding of tuberculosis and its treatment, importance of adherence to therapy, possible side effects, dietary habits and to address any misconceptions; leading to better adherence and improved outcome. Hence, study attempted to assess the impact of brief counselling intervention through treatment adherence supportive activist (TASA) in improving adherence to treatment among drug sensitive TB patients. METHODS: An explanatory mixed methods design (QUAN-Qual) was carried out. Out of 23 Tuberculosis units (TUs) in Ahmedabad Municipal Corporation (AMC) two were selected, one interventional group where trained counsellor was recruited while other was the control group. All drug sensitive TB patients diagnosed at both selected TUs during January to March 2020 were included in the study. Among all patients who were non-adherent in both the TUs, 14 were selected to explore factors contributing to non-adherence to treatment. RESULTS: At the end of intensive phase, drug adherence in the study TU was 85.71% while it was 67.5% in the control TU. At the end of one month of treatment, the proportion of patients having better level adherence was more among counselled patients as compared to non-counselled patients. Marital status, religion, gender did not affect the level of adherence. Reasons for non-adherence as well as perceived barriers to adherence to TB treatment were treatment related, patient related and social barriers. CONCLUSION: Dedicated NTEP counsellor (TASA) can help improve the treatment adherence and impact of physical counselling.


Assuntos
Tuberculose , Humanos , Tuberculose/tratamento farmacológico , Adesão à Medicação , Aconselhamento , Antituberculosos/uso terapêutico
9.
Bioengineering (Basel) ; 10(7)2023 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-37508810

RESUMO

Medical 3D printing is a complex, highly interdisciplinary, and revolutionary technology that is positively transforming the care of patients. The technology is being increasingly adopted at the Point of Care (PoC) as a consequence of the strong value offered to medical practitioners. One of the key technologies within the medical 3D printing portfolio enabling this transition is desktop inverted Vat Photopolymerization (VP) owing to its accessibility, high quality, and versatility of materials. Several reports in the peer-reviewed literature have detailed the medical impact of 3D printing technologies as a whole. This review focuses on the multitude of clinical applications of desktop inverted VP 3D printing which have grown substantially in the last decade. The principles, advantages, and challenges of this technology are reviewed from a medical standpoint. This review serves as a primer for the continually growing exciting applications of desktop-inverted VP 3D printing in healthcare.

10.
Gels ; 10(1)2023 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-38275845

RESUMO

Three-dimensional (3D) printing, also known as additive manufacturing, has revolutionized the production of physical 3D objects by transforming computer-aided design models into layered structures, eliminating the need for traditional molding or machining techniques. In recent years, hydrogels have emerged as an ideal 3D printing feedstock material for the fabrication of hydrated constructs that replicate the extracellular matrix found in endogenous tissues. Hydrogels have seen significant advancements since their first use as contact lenses in the biomedical field. These advancements have led to the development of complex 3D-printed structures that include a wide variety of organic and inorganic materials, cells, and bioactive substances. The most commonly used 3D printing techniques to fabricate hydrogel scaffolds are material extrusion, material jetting, and vat photopolymerization, but novel methods that can enhance the resolution and structural complexity of printed constructs have also emerged. The biomedical applications of hydrogels can be broadly classified into four categories-tissue engineering and regenerative medicine, 3D cell culture and disease modeling, drug screening and toxicity testing, and novel devices and drug delivery systems. Despite the recent advancements in their biomedical applications, a number of challenges still need to be addressed to maximize the use of hydrogels for 3D printing. These challenges include improving resolution and structural complexity, optimizing cell viability and function, improving cost efficiency and accessibility, and addressing ethical and regulatory concerns for clinical translation.

12.
Clin Imaging ; 82: 156-160, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34844100

RESUMO

INTRODUCTION: Medical centers have dramatically increased the use of magnetic resonance imaging (MRI). At 2 large academic tertiary care centers in New York City, nearly half of inpatient MRI orders took more than 12 h to complete, delaying patient discharge and increasing avoidable hospital days. We posited that transitioning inpatient MRIs to outpatient facilities, when safe and appropriate, could reduce inpatient MRI orders and avoidable hospital days. METHODS: We manually reviewed 59 inpatient MRI orders delayed on the estimated date of discharge (EDD). These orders were often delayed due to no standard process to escalate orders for medical reasons or no system to coordinate outpatient orders. We developed a revised workflow involving an automation platform that flagged inpatient MRI orders requested within 24 h of the EDD and emailed the care team to request a second review of the order. The care team reconsidered whether the order was (1) required for discharge, (2) non-urgent and could be converted to an outpatient order, or (3) unnecessary and could be canceled. RESULTS: Over 9 months, the automation platform flagged 618 inpatient MRI orders, of which 53.9% (333/618) were reviewed by the care team. Among the orders, 24.0% (80/333) of reviewed orders and 12.9% (80/618) of all orders were transitioned to either outpatient or canceled orders. These transitioned orders were associated with 267 fewer avoidable hospital days and a cost savings of $199,194. CONCLUSION: A standardized process and second review of inpatient MRI orders on the EDD can reduce inappropriate orders and more effectively use inpatient imaging resources. PRECIS: A standardized workflow and automation platform encouraged a second review of inpatient MRI orders to reduce inappropriate orders, avoidable hospital days, and hospital costs.


Assuntos
Pacientes Internados , Pacientes Ambulatoriais , Hospitais , Humanos , Imageamento por Ressonância Magnética , Fluxo de Trabalho
13.
Indian J Orthop ; 55(4): 1050-1055, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34194662

RESUMO

Congenital constriction band syndrome has varied clinical presentations ranging from small, incomplete skin deep constriction band to in utero amputation. Pseudarthrosis of underlying bone most commonly tibia has been reported by many authors. We report the first case of congenital pseudarthrosis of the femur with congenital constriction band syndrome. Nine-day-old female presented with the constriction band in the left thigh with open pseudarthrosis of the femur. The left femur had gross recurvatum deformity and the posterior apex of the pseudarthrosis was exposed via skin ulceration. She had an ipsilateral paralytic clubfoot. She was treated with single-stage excision of constriction band and Z-plasty. Spontaneous union of the femur was achieved at 3 months. Procurvatum deformity of the femur improved gradually over 3 years. This happens to be the first and only reported case of congenital pseudarthrosis of the femur with sciatic nerve palsy due to congenital constriction band.

14.
J Family Med Prim Care ; 10(10): 3925-3929, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34934707

RESUMO

Information on people living with HIV (PLHIV) and current COVID-19 pandemic is still scarce in Indian setting. This case series of PLHIV with COVID-19 describes clinical characteristics and outcome in this special group of patients. This case series included 11 confirmed cases of COVID-19 among PLHIV admitted at a tertiary care hospital in Gujarat, India during April-December 2020. This retrospective study was conducted by doing secondary data analysis from case records of patients for various variables including demographic, clinical characteristics, HIV-related parameters, and outcome (discharged/death). The mean age of patients was 39.2 years ranging from 20 to 55 years. Nearly, 18% (2/11) of patients had major comorbidities like diabetes and hypertension. All were taking antiretroviral therapy drugs with >95% drug adherence and had CD4 count ranging from 79/cu.mm. to 1189/cu.mm. Majority (91%) of patients recovered and were discharged while only one patient (9%) died during course of COVID-19 treatment. COVID-19 showed a similar clinical and epidemiological profile among PLHIV like other group of people. Further studies with large-sample size are recommended to find risks of COVID-19 among PLHIV and its impact on treatment outcomes.

15.
Qual Manag Health Care ; 29(4): 226-231, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32991540

RESUMO

BACKGROUND AND OBJECTIVES: Inability to obtain timely medications is a patient safety concern that can lead to delayed or incomplete treatment of illness. While there are many patient and system factors contributing to postdischarge medication nonadherence, availability and insurance-related barriers are preventable. PURPOSE: To implement a systematic process ensuring review of discharge prescriptions to ensure availability and resolve insurance barriers before patient discharge. METHODS: A prospective single-arm quality improvement intervention study to identify and address insurance-related prescription barriers using nonclinical staff. Intervention was pilot tested with sequential spread across general medicine resident teams. The primary outcome was successful obtainment of postdischarge prescriptions confirmed by phone calls to patients or their pharmacies. RESULTS: From April to August 2015, 59 of 161 patients included in the improvement process (36.6%) had one or more insurance or availability-related barriers with their prescriptions, totaling 89 issues. Forty-three of the 59 patients (72.9%) responded to postdischarge phone calls, 39 of whom (39/43, 90.7%) successfully filled their prescriptions on the first pharmacy visit. CONCLUSIONS: In our study, we preemptively identified that over a third of patients discharged would have encountered barriers filling their prescriptions. This interdisciplinary quality improvement project using nonclinical team members removed barriers for over 90% of our patients to ensure continuation of medical therapy without disruption and a safer postdischarge plan.


Assuntos
Seguro de Serviços Farmacêuticos , Adesão à Medicação/estatística & dados numéricos , Alta do Paciente , Medicamentos sob Prescrição/uso terapêutico , Adulto , Idoso , Feminino , Acessibilidade aos Serviços de Saúde , Humanos , Internato e Residência , Masculino , Pessoa de Meia-Idade , Farmácias , Projetos Piloto , Melhoria de Qualidade
16.
Jt Comm J Qual Patient Saf ; 45(3): 207-216, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30482662

RESUMO

BACKGROUND: Approximately 20%-50% of antimicrobial use in hospitals is inappropriate. Limited data exist on the effect of frontline provider engagement on antimicrobial stewardship outcomes. METHODS: A three-arm pre-post quality improvement study was conducted on three adult internal medicine teaching services at an urban academic hospital. Data from September through December 2016 were compared to historic data from corresponding months in 2015. Intervention arms were (1) Educational bundle (Ed-only); (2) Educational bundle plus antimicrobial stewardship rounds twice weekly with an infectious disease-trained clinical pharmacist (Ed+IDPharmDx2); and (3) Educational bundle plus internal medicine-trained clinical pharmacist embedded into daily attending rounds (Ed+IMPharmDx5). RESULTS: Total antibiotic use decreased by 16.8% (p < 0.001), 6.8% (p = 0.08), and 33.0% (p < 0.001) on Ed-only, Ed+IDPharmDx2, and Ed+IMPharmDx5 teams, respectively. Broad-spectrum antibiotic use decreased by 26.2% (p < 0.001), 7.8% (p = 0.09), and 32.4% (p < 0.001) on the Ed-only, Ed+IDPharmDx2, and Ed+IMPharmDx5 teams, respectively. Duration of inpatient antibiotic therapy decreased from 4 to 3 days on the Ed+IMPharmDx5 team (p = 0.01). Length of stay for patients who received any antibiotic decreased from 9 to 7 days on the Ed-only team (p < 0.001) and from 9 to 6 days on the Ed+IMPharmDx5 team (p < 0.001). There was no significant change in 30-day readmission to the same facility, transfer to ICU, or in-hospital mortality for any team. CONCLUSION: Multidisciplinary, frontline provider-driven approaches to antimicrobial stewardship may contribute to reduced antibiotic use and length of hospital stay.


Assuntos
Antibacterianos/administração & dosagem , Gestão de Antimicrobianos/organização & administração , Médicos Hospitalares/organização & administração , Farmacêuticos/organização & administração , Melhoria de Qualidade/organização & administração , Centros Médicos Acadêmicos/organização & administração , Antibacterianos/uso terapêutico , Hospitais Urbanos/organização & administração , Humanos , Capacitação em Serviço/organização & administração , Tempo de Internação , Readmissão do Paciente
17.
Materials (Basel) ; 11(1)2018 Jan 12.
Artigo em Inglês | MEDLINE | ID: mdl-29329199

RESUMO

Pressure induced densification and compression of a reprocessed sample of borosilicate glass has been studied by X-ray radiography and energy dispersive X-ray diffraction using a Paris-Edinburgh (PE) press at a synchrotron X-ray source. The reprocessing of a commercial borosilicate glass was carried out by cyclical melting and cooling. Gold foil pressure markers were used to obtain the sample pressure by X-ray diffraction using its known equation of state, while X-ray radiography provided a direct measure of the sample volume at high pressure. The X-ray radiography method for volume measurements at high pressures was validated for a known sample of pure α-Iron to 6.3 GPa. A sample of reprocessed borosilicate glass was compressed to 11.4 GPa using the PE cell, and the flotation density of pressure recovered sample was measured to be 2.755 gm/cc, showing an increase in density of 24%, as compared to the starting sample. The initial compression of the reprocessed borosilicate glass measured by X-ray radiography resulted in a bulk modulus of 30.3 GPa in good agreement with the 32.9 GPa value derived from the known elastic constants. This method can be applied to variety of amorphous materials under high pressures.

19.
J Res Natl Inst Stand Technol ; 107(3): 299-306, 2002.
Artigo em Inglês | MEDLINE | ID: mdl-27446732

RESUMO

The world standards for conventional ceramic hardness have varying requirements for control of loading rate during the indentation cycle. A literature review suggests that loading rate may affect measured hardness in some instances. In view of the uncertainty over this issue, new experiments over a range of indentation loading rates were performed on a steel, sintered silicon carbide, and an aluminum oxynitride. There was negligible effect upon Vickers hardness when loading rate was varied by almost four orders of magnitude from approximately 0.03 N/s to 10 N/s.

20.
J Agric Food Chem ; 58(12): 7280-8, 2010 Jun 23.
Artigo em Inglês | MEDLINE | ID: mdl-20486689

RESUMO

The impact of juice press fractions upon the content of varietal thiols in Sauvignon blanc has been examined for wines fermented at the laboratory scale (750 mL). Wines made from pressed juices (taken at 0.25 and 1.0 bar) contained less than half the concentration of 3-mercaptohexan-1-ol (3MH) and 3-mercaptohexyl acetate (3MHA), important contributors to the tropical and passion fruit character of Sauvignon blanc wines, compared to wines made from free run juices. The pressed juices and wines exhibited lower acidity values, more rapid decline in glutathione content, and more advanced polyphenol oxidation. Supplementation of the juices with glutathione (at 67 mg/L) prior to fermentation led to lower varietal thiol concentrations in the finished wines, typically by several percent, whereas treatment with polyvinylpolypyrrolidone (PVPP) made no impact on wine parameters. Pasteurization of pressed juices increased 3MHA content in the finished wines, but also led to a decline in 3MH concentrations.


Assuntos
Antioxidantes/análise , Bebidas/análise , Flavonoides/análise , Manipulação de Alimentos/métodos , Fenóis/análise , Saccharomyces cerevisiae/metabolismo , Vitis/química , Vinho/análise , Antioxidantes/metabolismo , Bebidas/microbiologia , Fermentação , Flavonoides/metabolismo , Fenóis/metabolismo , Polifenóis , Vitis/microbiologia , Vinho/microbiologia
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