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Baseline findings of a multicentric ambispective cohort study (2021-2022) among hospitalised mucormycosis patients in India. Mycology 2024; 15:70-84. [PMID: 38558844 PMCID: PMC10976993 DOI: 10.1080/21501203.2023.2271928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 10/12/2023] [Indexed: 04/04/2024] Open
Abstract
In India, the incidence of mucormycosis reached high levels during 2021-2022, coinciding with the COVID-19 pandemic. In response to this, we established a multicentric ambispective cohort of patients hospitalised with mucormycosis across India. In this paper, we report their baseline profile, clinical characteristics and outcomes at discharge. Patients hospitalized for mucormycosis during March-July 2021 were included. Mucormycosis was diagnosed based on mycological confirmation on direct microscopy (KOH/Calcofluor white stain), culture, histopathology, or supportive evidence from endoscopy or imaging. After consent, trained data collectors used medical records and telephonic interviews to capture data in a pre-tested structured questionnaire. At baseline, we recruited 686 patients from 26 study hospitals, of whom 72.3% were males, 78% had a prior history of diabetes, 53.2% had a history of corticosteroid treatment, and 80% were associated with COVID-19. Pain, numbness or swelling of the face were the commonest symptoms (73.3%). Liposomal Amphotericin B was the commonest drug formulation used (67.1%), and endoscopic sinus surgery was the most common surgical procedure (73.6%). At discharge, the disease was stable in 43.3%, in regression for 29.9% but 9.6% died during hospitalization. Among survivors, commonly reported disabilities included facial disfigurement (18.4%) and difficulties in chewing/swallowing (17.8%). Though the risk of mortality was only 1 in 10, the disability due to the disease was very high. This cohort study could enhance our understanding of the disease's clinical progression and help frame standard treatment guidelines.
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Proof-of-Concept and Characterization of Photosynthetic Bacteria as Radiation Enhancers. Int J Radiat Oncol Biol Phys 2023; 117:e226. [PMID: 37784914 DOI: 10.1016/j.ijrobp.2023.06.1134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Molecular O2 is a potent chemical radiosensitizer. Re-sensitizing hypoxic tumor tissues with O2 can enhance the therapeutic efficacy of ionizing radiation. Photosynthetic cyanobacteria (S. elongatus) or cyanos are currently being explored for various bioengineering applications due to their ability to produce oxygen when exposed to light. Here, we explore the use of these bacteria to replenish molecular O2 content inside hypoxic tumors, which in turn will enhance the effect of radiation. To assess the feasibility of this approach, we used A549 lungs cancer cell spheroids as models, which are three-dimensional (3D) in vitro cell aggregates that mimic tumors in terms of oxygen and nutrient gradients. MATERIALS/METHODS The cyanos were grown in 12:12h light /dark conditions in a bacterial shaker incubator (37ºC and 150 rpm). Biocompatibility of cyanos co-cultured withA549 monolayers and spheroids was estimated using the MTT assay and Calcein AM staining. The level of hypoxia content in the spheroids were measured using the Image IT green hypoxia dye. Spheroids co-cultured with cyanos were subjected to full spectrum lights for different time periods. After light incubation, different dosages of radiation (4, 6 and 12 Gy) were delivered to the spheroids using an X-ray irradiator (225 kBp, 13 mA). Post irradiation, the spheroids were harvested and analyzed based on Nuc green dye staining to estimate the dead cell population and clonogenic survival to estimate the post-therapy survival fraction. RESULTS Under exposure to full spectrum LED light, cyanos increased the concentration of dissolved O2 in the medium, eventually reaching fourfold higher levels (i.e., ∼240% of dissolved O2). Addition of cyanos to mammalian cell cultures did not result in detectable toxicity for either cellular monolayers or 3D spheroids. Cell viability was 100% even at the highest tested concentration of 1 × 107 number of cyanos cultured with 10,000 A549 cells. This confirmed the biocompatibility of the cyanos in cell culture environment. Post irradiation, as depicted from the Nuc green dye staining, was twofold higher (p<0.01) in spheroids co-cultured with cyanos and exposed to light. Surprisingly, in the clonogenic assay, this group of spheroids exhibited a higher survival fraction compared to the control group. This unexpected outcome warrants further investigation of the potentially radioprotecting effect of cyanos. Altogether, this supports the potential therapeutic efficacy of the cyanos in hypoxic tumors. CONCLUSION Cyanos in the presence of light are effective in enhancing radiation-induced cell death. While clinical translation is still far down the road, such a method could be employed in the context of brachytherapy or superficial radiotherapy to overcome tumor hypoxia.
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Role of Stereotactic Body Radiation Therapy in Portal Vein Tumor Thrombosis in Hepatocellular Carcinoma: A Prospective Single Institute Experience. Int J Radiat Oncol Biol Phys 2023; 117:e330-e331. [PMID: 37785168 DOI: 10.1016/j.ijrobp.2023.06.2381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Patients diagnosed with Hepatocellular carcinoma (HCC) complicated with portal vein tumor thrombosis (PVTT) have a limited number of treatment options available and are associated with an overall poor prognosis. With the recent developments in the field of radiation therapy, the role of radiotherapy particularly Stereotactic Body radiotherapy (SBRT) has increased as a loco-regional therapy for HCC. This study was planned to evaluate the role of SBRT in Locally advanced HCC complicated with PVTT and its role as loco-regional therapy. MATERIALS/METHODS We conducted a prospective study that included patients diagnosed with HCC complicated with PVTT Child-Turcotte Pugh (CTP) Class A/B with a maximum score of 7, diagnosed on triple phase Contrast-Enhanced - MRI unsuitable for other ablative procedures. Patients with Bilirubin levels > 4 mg/dl, active Hepatitis, CTP score >7, normal liver volume <700cc or history of prior radiotherapy were excluded from the study. Patients underwent a contrast enhanced 4D-CT simulation with abdominal compression and were planned for SBRT using VMAT technique. Patients were followed-up as per Institute protocol. CECT or MRI for a radiological response was done for response assessment using mRECIST criteria version 1.1. A baseline MRI was done at one-month post-SBRT to understand any RT changes in the liver and to differentiate from tumor progression during the response assessment at three months. RESULTS A total of 22 patients with HCC were recruited and received SBRT to PVTT, with a dosage between 30-42 Gy over 6 fractions treated on alternate days. Patients were assessed post-treatment with triphasic CE-MRI every 3 months as per institute protocol. Five patients had achieved Complete response in form of Portal vein recanalization. Three patients had Partial response to the treatment. Seven patients maintained stable disease status whereas six patients had disease progression during the entire course of treatment. The response rate (CR+PR) to treatment was 36.3% at the time of analysis. The Overall Response rate (CR+PR+SD) was 69%. No grade 3 or 4 toxicities were observed and treatment was tolerated well by patients. Kaplan-Meier method was applied to calculate the survival probability at various follow-up intervals. The median time for overall survival was 25 months ((95% CI: 15-35). Out of the 22 subjects included in the study, 6 patients died. There was a 78% survival probability at 12 months and a 68% survival probability at 18 months of follow-up. CONCLUSION This prospective single-arm study demonstrated the vital role of SBRT in the treatment of Hepatocellular carcinoma with Portal vein tumor thrombosis and its efficacy in terms of achieving excellent local control with relatively lesser toxicities compared with existing treatment modalities. Patients have shown benefit post-treatment in terms of thrombus reduction and restoration of Portal vein flow making them suitable for further treatment like Resection or TACE.
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Biological Response Assessment in Hepatocellular Carcinoma Post Stereotactic Body Radiotherapy. Int J Radiat Oncol Biol Phys 2023; 117:e331. [PMID: 37785169 DOI: 10.1016/j.ijrobp.2023.06.2382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Biological Response in Hepatocellular carcinoma (HCC) is measured in terms of serum alpha-fetoprotein (AFP) which is elevated in nearly 60% HCC patients at baseline and is directly related to the severity of the disease. This biological response is defined as the reduction of more than 50% from the baseline levels and is associated with an increased percentage of tumor necrosis and is directly related to increased loco-regional control. Patients diagnosed with HCC have very limited treatment modalities. With the recent advances in the field of radiation therapy and the development of Stereotactic Body radiotherapy (SBRT), the role of radiotherapy has increased as a loco-regional modality for HCC. In this single-arm prospective study, we evaluated the biological response post-SBRT in patients diagnosed with HCC. MATERIALS/METHODS We conducted a prospective study that included patients diagnosed with HCC with baseline elevation of serum AFP, Child-Turcotte Pugh (CTP) Class A/B with a maximum score of 7. Patient's serum AFP levels were recorded at baseline, pre-treatment, and post-treatment. The biological response was measured at 3 months post-treatment and compared with the baseline serum AFP levels using Wilcoxon signed rank test. RESULTS A total of 14 patients with HCC were recruited and received SBRT to the target lesion, with a dose between 30-42 Gy over 6 fractions treated on alternate days. Patients were assessed post-treatment at one month with triphasic CEMRI and serum AFP levels. 12 out of 14 patients (85.71%) had a biological response at 3 months follow-up and levels showed further decline unless a progression was found. The median (IQR) serum AFP level was 1131 ng/ml (359-5668 ng/ml) at baseline. Post-treatment serum AFP levels had a median (IQR) value of 156 ng/ml (15-372 ng/ml) showing a near reduction of 86% from baseline, which was significant. 2/14 pts (14.28%) showed no reduction or even increase in serum AFP levels post-treatment. CONCLUSION This prospective single-arm study demonstrated the vital role of SBRT in the treatment of HCC and its importance in achieving a better disease control. The response was achieved in 86% of patients with marked reduction of nearly 90% in serum AFP levels as compared to the baseline and increased median OS and PFS as compared to patients not receiving radiotherapy. Further prospective studies are warranted to confirm our findings.
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Comparison of Multimodal Pain Control Following Bilateral Lung Transplantation. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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A Case Report of an Unusual Cause of Dysphagia from Enlarged Subcarinal Lymph Node. Mymensingh Med J 2022; 31:1202-1205. [PMID: 36189573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Cough, hemoptysis, chest pain, and weight loss are classic symptoms of bronchial carcinoma. Small cell lung cancer presents late with obviously abnormal chest radiographs and with bulky, usually mediastinal lymph node involvement. Dysphagia rarely occurs in patients with bronchial carcinoma. There are many causes of dysphagia in bronchial carcinoma such as mediastinal lymphadenopathy, direct tumor invasion of the mediastinum, radiotherapy, secondary achalasia. This report presents a case of progressive dysphagia to solid foods and weight loss of a 28-year-old male, non-smoker due to subcarinal lymph node enlargement from metastatic bronchial adenocarcinoma.
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Knowledge and Awareness about Systemic Effects of Periodontal Disease among Medical, Dental and Alternate Medical Practitioners and Their Referral Practice to Periodontists. Mymensingh Med J 2022; 31:1153-1161. [PMID: 36189566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In the past few decades, many medical professionals and dentists have paid close notice to their own fields, specializing in medicine pertaining to body and oral cavity respectively. Currently, this void is rapidly closing between all medical specialties, in presence of significant findings that supports association between periodontal disease and systemic conditions. Till now, some practitioners are not aware about the specialties of dentistry that results in improper referral practices. There are few studies on referral practice pertaining to periodontist, not with standing the fact that clear and effective communication between all health practitioners is essential for good practice. A cross-sectional study was carried out to assess the knowledge and awareness about systemic effects of periodontal disease among medical, dental and alternate medical practitioners and their referral practice to periodontist in Kanpur city. This cross-sectional study was carried out using self-reported questionnaire, distributed to 560 practitioners of various medical fields from January 2020 to August 2021. A total of 206(36.8%) Medical, 194(34.6%) Dentists and 160(28.6%) alternative practitioners participated in study. More than half participants agreed about relationship between periodontal diseases and Diabetes Mellitus, Cardio-VascularDisease and Adverse Pregnancy Outcomes. Among all 31.3% showed good knowledge level while 2.7% showed perfect level of practitioner's referral practice to periodontist. Dentists had statistically higher level of awareness compared to physicians. Referral practice to periodontist was deficit by medical and alternate medical practitioners despite of fact; they have good knowledge of relationship between periodontal disease and systemic health. Hence, interdisciplinary dental and medical training of practitioners is recommended.
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The influence of anastomotic techniques on postoperative anastomotic complications: Results of the Oesophago-Gastric Anastomosis Audit. J Thorac Cardiovasc Surg 2022; 164:674-684.e5. [PMID: 35249756 DOI: 10.1016/j.jtcvs.2022.01.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 12/22/2021] [Accepted: 01/18/2022] [Indexed: 12/08/2022]
Abstract
BACKGROUND The optimal anastomotic techniques in esophagectomy to minimize rates of anastomotic leakage and conduit necrosis are not known. The aim of this study was to assess whether the anastomotic technique was associated with anastomotic failure after esophagectomy in the international Oesophago-Gastric Anastomosis Audit cohort. METHODS This prospective observational multicenter cohort study included patients undergoing esophagectomy for esophageal cancer over 9 months during 2018. The primary exposure was the anastomotic technique, classified as handsewn, linear stapled, or circular stapled. The primary outcome was anastomotic failure, namely a composite of anastomotic leakage and conduit necrosis, as defined by the Esophageal Complications Consensus Group. Multivariable logistic regression modeling was used to identify the association between anastomotic techniques and anastomotic failure, after adjustment for confounders. RESULTS Of the 2238 esophagectomies, the anastomosis was handsewn in 27.1%, linear stapled in 21.0%, and circular stapled in 51.9%. Anastomotic techniques differed significantly by the anastomosis sites (P < .001), with the majority of neck anastomoses being handsewn (69.9%), whereas most chest anastomoses were stapled (66.3% circular stapled and 19.3% linear stapled). Rates of anastomotic failure differed significantly among the anastomotic techniques (P < .001), from 19.3% in handsewn anastomoses, to 14.0% in linear stapled anastomoses, and 12.1% in circular stapled anastomoses. This effect remained significant after adjustment for confounding factors on multivariable analysis, with an odds ratio of 0.63 (95% CI, 0.46-0.86; P = .004) for circular stapled versus handsewn anastomosis. However, subgroup analysis by anastomosis site suggested that this effect was predominantly present in neck anastomoses, with anastomotic failure rates of 23.2% versus 14.6% versus 5.9% for handsewn versus linear stapled anastomoses versus circular stapled neck anastomoses, compared with 13.7% versus 13.8% versus 12.2% for chest anastomoses. CONCLUSIONS Handsewn anastomoses appear to be independently associated with higher rates of anastomotic failure compared with stapled anastomoses. However, this effect seems to be largely confined to neck anastomoses, with minimal differences between techniques observed for chest anastomoses. Further research into standardization of anastomotic approach and techniques may further improve outcomes.
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Graphene-Coated Halloysite Nanoclay Membrane for the Enhanced Separation of Hydrogen from a Hydrogen-Helium Mixture. ACS APPLIED MATERIALS & INTERFACES 2022; 14:32444-32456. [PMID: 35793082 DOI: 10.1021/acsami.2c04576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This study highlights the separation of hydrogen from H2-He mixture gas by a graphene-coated halloysite nanoclay membrane. The graphene-coated clay membrane along with its pure clay counterpart is successfully developed and studied for gas separation using hydrogen (H2)-helium (He) single and mixture gases. Hydrothermal and nonhydrothermal methods were applied for the synthesis of a ″coated″ membrane on a porous alumina substrate from the graphene and halloysite clay. To date, nanoporous zeolites are the potential materials for gas separation based on a molecular sieving mechanism. A similar separation mechanism for hydrogen and helium from mixture gases may not work efficaciously due to the closeness of their kinetic diameter (H2: 2.89 Å and He: 2.6 Å). The presence of defects and torn nanopores between graphene layers along with the different surface charges of the inner and outer layer of halloysite nanotubes facilitates the ″coated″ membrane to show an appreciable H2/He separation factor of ∼4 using H2-He (1:1) mixture gas compared to 2.86 for the pure halloysite membrane. The available charge layer of graphene also has a significant contribution for this increased H2/He selectivity value. The permeate flux of H2 and He through both the graphene-coated clay membrane and pure clay membrane has also been noted. The permeate flux of pure H2 and He was 2 × 10-7 and 1.3 × 10-7 mol m-2 s-1 Pa-1 for the clay membrane, whereas for the ″coated″ clay membrane, the values changed to 0.1 × 10-7 and ∼0.05 × 10-7 mol m-2 s-1 Pa-1 at 100 kPa, respectively.
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Textbook outcome following oesophagectomy for cancer: international cohort study. Br J Surg 2022. [DOI: https://doi.org/10.1093/bjs/znac016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
Background
Textbook outcome has been proposed as a tool for the assessment of oncological surgical care. However, an international assessment in patients undergoing oesophagectomy for oesophageal cancer has not been reported. This study aimed to assess textbook outcome in an international setting.
Methods
Patients undergoing curative resection for oesophageal cancer were identified from the international Oesophagogastric Anastomosis Audit (OGAA) from April 2018 to December 2018. Textbook outcome was defined as the percentage of patients who underwent a complete tumour resection with at least 15 lymph nodes in the resected specimen and an uneventful postoperative course, without hospital readmission. A multivariable binary logistic regression model was used to identify factors independently associated with textbook outcome, and results are presented as odds ratio (OR) and 95 per cent confidence intervals (95 per cent c.i.).
Results
Of 2159 patients with oesophageal cancer, 39.7 per cent achieved a textbook outcome. The outcome parameter ‘no major postoperative complication’ had the greatest negative impact on a textbook outcome for patients with oesophageal cancer, compared to other textbook outcome parameters. Multivariable analysis identified male gender and increasing Charlson comorbidity index with a significantly lower likelihood of textbook outcome. Presence of 24-hour on-call rota for oesophageal surgeons (OR 2.05, 95 per cent c.i. 1.30 to 3.22; P = 0.002) and radiology (OR 1.54, 95 per cent c.i. 1.05 to 2.24; P = 0.027), total minimally invasive oesophagectomies (OR 1.63, 95 per cent c.i. 1.27 to 2.08; P < 0.001), and chest anastomosis above azygous (OR 2.17, 95 per cent c.i. 1.58 to 2.98; P < 0.001) were independently associated with a significantly increased likelihood of textbook outcome.
Conclusion
Textbook outcome is achieved in less than 40 per cent of patients having oesophagectomy for cancer. Improvements in centralization, hospital resources, access to minimal access surgery, and adoption of newer techniques for improving lymph node yield could improve textbook outcome.
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Textbook outcome following oesophagectomy for cancer: international cohort study. Br J Surg 2022; 109:439-449. [PMID: 35194634 DOI: 10.1093/bjs/znac016] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/08/2021] [Accepted: 01/04/2022] [Indexed: 11/14/2022]
Abstract
BACKGROUND Textbook outcome has been proposed as a tool for the assessment of oncological surgical care. However, an international assessment in patients undergoing oesophagectomy for oesophageal cancer has not been reported. This study aimed to assess textbook outcome in an international setting. METHODS Patients undergoing curative resection for oesophageal cancer were identified from the international Oesophagogastric Anastomosis Audit (OGAA) from April 2018 to December 2018. Textbook outcome was defined as the percentage of patients who underwent a complete tumour resection with at least 15 lymph nodes in the resected specimen and an uneventful postoperative course, without hospital readmission. A multivariable binary logistic regression model was used to identify factors independently associated with textbook outcome, and results are presented as odds ratio (OR) and 95 per cent confidence intervals (95 per cent c.i.). RESULTS Of 2159 patients with oesophageal cancer, 39.7 per cent achieved a textbook outcome. The outcome parameter 'no major postoperative complication' had the greatest negative impact on a textbook outcome for patients with oesophageal cancer, compared to other textbook outcome parameters. Multivariable analysis identified male gender and increasing Charlson comorbidity index with a significantly lower likelihood of textbook outcome. Presence of 24-hour on-call rota for oesophageal surgeons (OR 2.05, 95 per cent c.i. 1.30 to 3.22; P = 0.002) and radiology (OR 1.54, 95 per cent c.i. 1.05 to 2.24; P = 0.027), total minimally invasive oesophagectomies (OR 1.63, 95 per cent c.i. 1.27 to 2.08; P < 0.001), and chest anastomosis above azygous (OR 2.17, 95 per cent c.i. 1.58 to 2.98; P < 0.001) were independently associated with a significantly increased likelihood of textbook outcome. CONCLUSION Textbook outcome is achieved in less than 40 per cent of patients having oesophagectomy for cancer. Improvements in centralization, hospital resources, access to minimal access surgery, and adoption of newer techniques for improving lymph node yield could improve textbook outcome.
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Sex-Cord Tumor with Annular Tubules with Unusual Morphology in an Infant with Peutz-Jeghers Syndrome. Fetal Pediatr Pathol 2022; 41:306-311. [PMID: 32609034 DOI: 10.1080/15513815.2020.1786200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Background Peutz-Jeghers syndrome (PJS) is characterized by hamartomatous gastrointestinal polyposis, mucocutaneous pigmentation and cancer predisposition. The clinical features of PJS manifest in first two decades of life; however, neonatal presentation is uncommon. Case report: We present a five day old girl with PJS that presented with obstructive hamartomatous polyps in the sigmoid colon. At colostomy closure at six months, an incidental ovarian sex-cord tumor with annular tubules (SCTAT) was detected. It showed predominantly a solid pattern with limited tubule formation and was composed of lipid-rich cells. She had no hormonal symptoms. Conclusion: SCTAT can occur as young as six months of age in PJS, and may show histologic overlap with lipid-rich Sertoli cell tumors.
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Some contribution to W(VI)-peroxo-chemistry: Synthesis, spectroscopic characterization, reactivity and DFT studies. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2021.100327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Blood group discrepancy in A h para-Bombay phenotype: a rare blood group variant and its clinical significance. Immunohematology 2021; 37:160-164. [PMID: 34964314 DOI: 10.21307/immunohematology-2021-026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Individuals with the rare para-Bombay phenotype have inherited defects in producing H associated with FUT1 and/or FUT2 genes. We report a case of blood group discrepancy in a para-Bombay patient from a tertiary care hospital of eastern India. A 31-year-old woman with rheumatic heart disease presented with fatigue and breathlessness and was then scheduled for valvuloplasty, for which a blood transfusion request was sent to the blood center. During pre-transfusion testing, red blood cell (RBC) testing showed group O, and serum testing showed strong reactivity with group B RBCs, weak reactivity with group O RBCs, and very weak reactivity with group A RBCs. Saliva inhibition testing and enzyme treatment of RBCs concluded the patient to be of "Ah para-Bombay" phenotype. The patient's Lewis phenotype was Le(a-b+). This patient's serum also had cold-reacting anti-IH along with anti-B. This case report highlights the importance of performing an advanced immunohematologic workup, including adsorption, elution, enzyme treatment, and saliva inhibition testing for identification of weak A or B subgroups as well as the rare para-Bombay blood group, when routine ABO typing, using forward and reverse grouping, is inconclusive. Accurate identification of blood group helps in preventing transfusion-related adverse events and encouraging safe transfusion practice. Individuals with the rare para-Bombay phenotype have inherited defects in producing H associated with FUT1 and/or FUT2 genes. We report a case of blood group discrepancy in a para-Bombay patient from a tertiary care hospital of eastern India. A 31-year-old woman with rheumatic heart disease presented with fatigue and breathlessness and was then scheduled for valvuloplasty, for which a blood transfusion request was sent to the blood center. During pre-transfusion testing, red blood cell (RBC) testing showed group O, and serum testing showed strong reactivity with group B RBCs, weak reactivity with group O RBCs, and very weak reactivity with group A RBCs. Saliva inhibition testing and enzyme treatment of RBCs concluded the patient to be of “Ah para-Bombay” phenotype. The patient’s Lewis phenotype was Le(a–b+). This patient’s serum also had cold-reacting anti-IH along with anti-B. This case report highlights the importance of performing an advanced immunohematologic workup, including adsorption, elution, enzyme treatment, and saliva inhibition testing for identification of weak A or B subgroups as well as the rare para-Bombay blood group, when routine ABO typing, using forward and reverse grouping, is inconclusive. Accurate identification of blood group helps in preventing transfusion-related adverse events and encouraging safe transfusion practice.
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Postoperative outcomes in oesophagectomy with trainee involvement. BJS Open 2021; 5:zrab132. [PMID: 35038327 PMCID: PMC8763367 DOI: 10.1093/bjsopen/zrab132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 11/15/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The complexity of oesophageal surgery and the significant risk of morbidity necessitates that oesophagectomy is predominantly performed by a consultant surgeon, or a senior trainee under their supervision. The aim of this study was to determine the impact of trainee involvement in oesophagectomy on postoperative outcomes in an international multicentre setting. METHODS Data from the multicentre Oesophago-Gastric Anastomosis Study Group (OGAA) cohort study were analysed, which comprised prospectively collected data from patients undergoing oesophagectomy for oesophageal cancer between April 2018 and December 2018. Procedures were grouped by the level of trainee involvement, and univariable and multivariable analyses were performed to compare patient outcomes across groups. RESULTS Of 2232 oesophagectomies from 137 centres in 41 countries, trainees were involved in 29.1 per cent of them (n = 650), performing only the abdominal phase in 230, only the chest and/or neck phases in 130, and all phases in 315 procedures. For procedures with a chest anastomosis, those with trainee involvement had similar 90-day mortality, complication and reoperation rates to consultant-performed oesophagectomies (P = 0.451, P = 0.318, and P = 0.382, respectively), while anastomotic leak rates were significantly lower in the trainee groups (P = 0.030). Procedures with a neck anastomosis had equivalent complication, anastomotic leak, and reoperation rates (P = 0.150, P = 0.430, and P = 0.632, respectively) in trainee-involved versus consultant-performed oesophagectomies, with significantly lower 90-day mortality in the trainee groups (P = 0.005). CONCLUSION Trainee involvement was not found to be associated with significantly inferior postoperative outcomes for selected patients undergoing oesophagectomy. The results support continued supervised trainee involvement in oesophageal cancer surgery.
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Communicating climate change findings from IPCC reports: insights from outreach events in India. CLIMATIC CHANGE 2021; 168:23. [PMID: 34703067 PMCID: PMC8532437 DOI: 10.1007/s10584-021-03224-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
In recent years, the Intergovernmental Panel on Climate Change (IPCC) has been collaborating with Indian institutions to organise outreach events. This essay draws on the perspective of participants, speakers and organisers of 17 in-person outreach events conducted across India in 2018 and 2020, to share insights and recommendations for future IPCC events in India and other developing country contexts. The formats analysed in this essay range from panel events with very large public audiences to more focused workshops, meetings and seminars. Target audiences covered both academic and non-academic audiences and included researchers, teachers, students, industry and NGOs. The events, while achieving their main objective of communicating the findings of IPCC reports, also provided a platform for open discussion of localised climate impacts and good practices in adaptation and mitigation. There are, however, notable challenges to public outreach in India, specifically in terms of attracting an adequate number of participants, experts' availability, communicating to a diverse audience and translation into local languages. The biggest challenge faced by speakers was a lack of knowledge about the number of attendees and the composition of the audience prior to an event. It is our recommendation that future outreach events in India are designed to be interactive, tailored to the regional context and complemented by simplified communication materials. Speakers should be provided with audience information and background prior to the event, and greater reach into rural areas, including school children, could be achieved with material in local languages. Additionally, event organisers often require logistical and operational support to host outreach events.
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Experiment and FEM Analysis of Silica Nanoparticle-Based Impedance Immunosensor for Sensitivity Enhancement. IEEE Trans Nanobioscience 2021; 20:247-255. [PMID: 33690122 DOI: 10.1109/tnb.2021.3064677] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This article investigates the impact of incorporating silica nanoparticles of varying diameters in label free impedance immunosensor. It has been observed that even if the surface area improvement has been adjusted to be similar for all the diameters, the sensitivity is enhanced by five times at a particular diameter of 100 nm due to the optimum combination of intersection with electric field lines and surface convexity. This study has enabled the detection of 0.1 fM Hep-B surface antigen with a reliable sensitivity of around 75%. Further, it has been observed that the SNR corresponding to 0.1 fM is 20 dB only for 100 nm particle. This SNR is comparable to a recent report on Hep-B virus detection but the limit of detection in the proposed sensor is lowered by more than three orders of magnitude.
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Suicide is multifactorial: There should be a difference between a news report and a scientific report of suicide. ETHICS, MEDICINE AND PUBLIC HEALTH 2021; 17:100643. [DOI: 10.1016/j.jemep.2021.100643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
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Mortality from esophagectomy for esophageal cancer across low, middle, and high-income countries: An international cohort study. EUROPEAN JOURNAL OF SURGICAL ONCOLOGY 2021; 47:1481-1488. [PMID: 33451919 DOI: 10.1016/j.ejso.2020.12.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Accepted: 12/09/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND No evidence currently exists characterising global outcomes following major cancer surgery, including esophageal cancer. Therefore, this study aimed to characterise impact of high income countries (HIC) versus low and middle income countries (LMIC) on the outcomes following esophagectomy for esophageal cancer. METHOD This international multi-center prospective study across 137 hospitals in 41 countries included patients who underwent an esophagectomy for esophageal cancer, with 90-day follow-up. The main explanatory variable was country income, defined according to the World Bank Data classification. The primary outcome was 90-day postoperative mortality, and secondary outcomes were composite leaks (anastomotic leak or conduit necrosis) and major complications (Clavien-Dindo Grade III - V). Multivariable generalized estimating equation models were used to produce adjusted odds ratios (ORs) and 95% confidence intervals (CI95%). RESULTS Between April 2018 to December 2018, 2247 patients were included. Patients from HIC were more significantly older, with higher ASA grade, and more advanced tumors. Patients from LMIC had almost three-fold increase in 90-day mortality, compared to HIC (9.4% vs 3.7%, p < 0.001). On adjusted analysis, LMIC were independently associated with higher 90-day mortality (OR: 2.31, CI95%: 1.17-4.55, p = 0.015). However, LMIC were not independently associated with higher rates of anastomotic leaks (OR: 1.06, CI95%: 0.57-1.99, p = 0.9) or major complications (OR: 0.85, CI95%: 0.54-1.32, p = 0.5), compared to HIC. CONCLUSION Resections in LMIC were independently associated with higher 90-day postoperative mortality, likely reflecting a failure to rescue of these patients following esophagectomy, despite similar composite anastomotic leaks and major complication rates to HIC. These findings warrant further research, to identify potential issues and solutions to improve global outcomes following esophagectomy for cancer.
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Comparison of short-term outcomes from the International Oesophago-Gastric Anastomosis Audit (OGAA), the Esophagectomy Complications Consensus Group (ECCG), and the Dutch Upper Gastrointestinal Cancer Audit (DUCA). BJS Open 2021; 5:zrab010. [PMID: 35179183 PMCID: PMC8140199 DOI: 10.1093/bjsopen/zrab010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 01/27/2021] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The Esophagectomy Complications Consensus Group (ECCG) and the Dutch Upper Gastrointestinal Cancer Audit (DUCA) have set standards in reporting outcomes after oesophagectomy. Reporting outcomes from selected high-volume centres or centralized national cancer programmes may not, however, be reflective of the true global prevalence of complications. This study aimed to compare complication rates after oesophagectomy from these existing sources with those of an unselected international cohort from the Oesophago-Gastric Anastomosis Audit (OGAA). METHODS The OGAA was a prospective multicentre cohort study coordinated by the West Midlands Research Collaborative, and included patients undergoing oesophagectomy for oesophageal cancer between April and December 2018, with 90 days of follow-up. RESULTS The OGAA study included 2247 oesophagectomies across 137 hospitals in 41 countries. Comparisons with the ECCG and DUCA found differences in baseline demographics between the three cohorts, including age, ASA grade, and rates of chronic pulmonary disease. The OGAA had the lowest rates of neoadjuvant treatment (OGAA 75.1 per cent, ECCG 78.9 per cent, DUCA 93.5 per cent; P < 0.001). DUCA exhibited the highest rates of minimally invasive surgery (OGAA 57.2 per cent, ECCG 47.9 per cent, DUCA 85.8 per cent; P < 0.001). Overall complication rates were similar in the three cohorts (OGAA 63.6 per cent, ECCG 59.0 per cent, DUCA 62.2 per cent), with no statistically significant difference in Clavien-Dindo grades (P = 0.752). However, a significant difference in 30-day mortality was observed, with DUCA reporting the lowest rate (OGAA 3.2 per cent, ECCG 2.4 per cent, DUCA 1.7 per cent; P = 0.013). CONCLUSION Despite differences in rates of co-morbidities, oncological treatment strategies, and access to minimal-access surgery, overall complication rates were similar in the three cohorts.
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A Preliminary Study on the Evaluation of In-vitro Inhibition Potential of Antimicrobial Efficacy of Raw and Commercial Honey on Escherichia coli: An Emerging Periodontal Pathogen. Mymensingh Med J 2021; 30:547-554. [PMID: 33830141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Periodontitis, a multiple pathogen disease has the latest addition to the family i.e. Escherichia coli as a potential and emerging periodontal pathogen owing to its lipopolysaccharide more potent than Porphyromonas gingivalis, which makes it an emerging threat in periodontal disease. The role of antimicrobial agents in the management of periodontal diseases is of utmost importance. However, in the present scenario, antibiotic resistance is a public health concern now and there are very few options left for treatment. So, honey, a pioneer in traditional medicine was tried in the treatment against Escherichia coli to evaluate and compare the "in-vitro" antibacterial activity and efficacy of raw and commercial honey at different concentrations in comparison to tetracycline as a control on patient-isolated Escherichia coli and the American Type Culture Collection (ATCC) Escherichia coli 25922 strain from 5th Aug 2018 to 15th Feb 2019 at the Department of Microbiology, Rama Medical College, Kanpur (UP), India. In the in-vitro study different concentrations (100%, 75%, 50% and 25% v/v) of raw and commercial honey were studied and sensitivity tests were used to evaluate their antibacterial effect on patient-isolated Escherichia coli and the ATCC Escherichia coli 25922 strain. Minimum inhibitory concentration (MIC) and Minimum bactericidal concentration (MBC) were also determined for raw honey, and commercial honey in comparison to tetracycline. In case of raw honey, zone of inhibition was seen at 100%, 75% and 50% concentration, with maximum inhibition being 27±1.154mm and 23±0.666mm for patient-isolated Escherichia coli and ATCC Escherichia coli 25922 strain respectively at 100% concentration, whereas, the commercial honey was effective only at 100% and 75% concentration, with maximum inhibition zone of 13±1.054mm and 17±0.942mm at 100% concentration on patient-isolated Escherichia coli and ATCC Escherichia coli 25922 strain respectively. However, no effect was observed at 25% concentration for both raw and commercial honey. The MIC and MBC of raw and commercial honey were determined by the broth dilution method, where raw honey exhibited both MIC and MBC at 512 mg/ml whereas, and commercial honey exhibited MIC at 512mg/ml and MBC at 1024 mg/ml respectively. While comparing the zone of inhibition of raw and commercial honey, it was observed that the raw honey showed almost equivalent potency and efficacy as compared to a positive control tetracycline (2.5%). There was statistically significant difference (p≤0.01) in zone of inhibition of raw and commercial honey at 100% concentration on patient-isolated Escherichia coli and ATCC Escherichia coli 25922 strain. Antimicrobial activity of raw honey at 100% concentration was equivalent to that of tetracycline and was significantly better than commercial honey.
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Closed form solutions of convection‐diffusion mechanisms in two dimensions for
H
2
separation from (
H
2
/
CO
2
) mixture at room temperature. CAN J CHEM ENG 2021. [DOI: 10.1002/cjce.24001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Label free, electric field mediated ultrasensitive electrochemical point-of-care device for CEA detection. Sci Rep 2021; 11:2962. [PMID: 33536505 PMCID: PMC7859218 DOI: 10.1038/s41598-021-82580-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 01/20/2021] [Indexed: 01/09/2023] Open
Abstract
Developing point-of-care (PoC) diagnostic platforms for carcinoembryonic antigen detection is essential. However, thefew implementations of transferring the signal amplification strategies in electrochemical sensing on paper-based platforms are not satisfactory in terms of detection limit (LOD). In the quest for pushing down LOD, majority of the research has been targeted towards development of improved nanostructured substrates for entrapping more analyte molecules and augmenting the electron transfer rate to the working electrode. But, such approaches have reached saturation. This paper focuses on enhancing the mass transport of the analyte towards the sensor surface through the application of an electric field, in graphene-ZnO nanorods heterostructure. These hybrid nanostructures have been deposited on flexible polyethylene terephthalate substrates with screen printed electrodes for PoC application. The ZnO nanorods have been functionalized with aptamers and the working sensor has been integrated with smartphone interfaced indigenously developed low cost potentiostat. The performance of the system, requiring only 50 µl analyte has been evaluated using electrochemical impedance spectroscopy and validated against commercially available ELISA kit. Limit of detection of 1 fg/ml in human serum with 6.5% coefficient of variation has been demonstrated, which is more than three orders of magnitude lower than the existing attempts on PoC device.
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Cobalt ferrite nanoparticles prepared by microwave hydrothermal synthesis and adsorption efficiency for organic dyes: Isotherms, thermodynamics and kinetic studies. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.10.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Quantitative Coronary Calcium Burden Using Ct Scan With “As Low As Reasonably Achievable” Radiation Dose And Maintaining Acceptable Image Quality. J Cardiovasc Comput Tomogr 2020. [DOI: 10.1016/j.jcct.2020.06.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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EP1.18-14 Algorithm for Deciding Radiotherapy Technique in Stage III Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Development of LTA zeolite membrane from clay by sonication assisted method at room temperature for H 2-CO 2 and CO 2-CH 4 separation. ULTRASONICS SONOCHEMISTRY 2018; 48:299-310. [PMID: 30080554 DOI: 10.1016/j.ultsonch.2018.06.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/18/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
In this work, sodium aluminosilicate zeolite powder and membranes were synthesized by ultrasonic irradiation at room temperature using montmorillonite clay as precursor material. For comparison, same zeolite powder and membranes were synthesized at 100 °C also. The synthesized zeolites were characterized by X-ray diffraction (XRD), infrared (IR) spectral analysis, and field-emission scanning electron microscopy (FESEM). XRD and IR results showed that phase pure mainly LTA phase was formed after 15 days of aging at room temperature. By using the zeolite powders as seeds, membranes were synthesized on clay alumina support tubes at room temperature and also at 100 °C. In both the cases membranes were formed on support surface. The membrane thickness was found to be 15 μm. The performances of the membranes were evaluated by single gas as well as mixture gas permeation measurement for H2-CO2 and CO2-CH4 respectively. The H2-CO2 and CO2-CH4 separation selectivity for the mixture gas of the membrane was found to 16.2 and 20.9 at room temperature respectively. To the best of our knowledge, there is no report of synthesis of zeolite membrane at room temperature using clay as raw materials. For the first time we have reported the synthesis of alumino-silicate zeolite membrane on clay alumina support surface using clay as starting material by sonochemical method at room temperature.
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Liquid gated ZnO nanorod FET sensor for ultrasensitive detection of Hepatitis B surface antigen with vertical electrode configuration. Biosens Bioelectron 2018; 122:58-67. [PMID: 30240967 DOI: 10.1016/j.bios.2018.09.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 09/02/2018] [Accepted: 09/04/2018] [Indexed: 01/10/2023]
Abstract
Detection of the Hepatitis-B surface antigen at the attomolar level is demonstrated using antibody functionalized liquid gated ZnO nanorods field effect transistor (FET) biosensor with vertical electrode configuration. The sensor is operated in heterodyne mode at high frequency to overcome the problem of Debye screening effect in physiological analyte. Enhanced penetration of the electric field lines through the nanorods enables significant improvement in the limit of detection and sensitivity compared to that of the conventional lateral electrode configuration. The combined effect of the probable change in the threshold voltage and the carrier mobility for vertical electrode configuration lead to a sensitivity of around 75% at 1 fM (which is an enhancement by 200%) and a detection limit of 20 aM with a dynamic range from 20 aM to 1 pM. The detection limit which is achieved with the proposed label free sensor in physiological analyte using antibodies is lowered by more than three orders of magnitude compared to the existing reports.
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Nanocrystalline silver gel versus conventional silver sulfadiazine cream as topical dressing for second-degree burn wound: A clinicopathological comparison. INDIAN JOURNAL OF BURNS 2018. [DOI: 10.4103/ijb.ijb_9_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Isolation, characterization, and identification of two methomyl-degrading bacteria from a pesticide-treated crop field in West Bengal, India. Microbiology (Reading) 2017. [DOI: 10.1134/s0026261717060145] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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In situ
carbon deposition in polyetherimide/SAPO-34 mixed matrix membrane for efficient CO2
/CH4
separation. J Appl Polym Sci 2017. [DOI: 10.1002/app.45508] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Ultrasonic assisted synthesis of Bikitaite zeolite: A potential material for hydrogen storage application. ULTRASONICS SONOCHEMISTRY 2017; 36:466-473. [PMID: 28069234 DOI: 10.1016/j.ultsonch.2016.12.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 12/23/2016] [Accepted: 12/23/2016] [Indexed: 06/06/2023]
Abstract
Li containing Bikitaite zeolite has been synthesized by an ultrasound-assisted method and used as a potential material for hydrogen storage application. The Sonication energy was varied from 150W to 250W and irradiation time from 3h to 6h. The Bikitaite nanoparticles were characterized by X-ray diffraction (XRD), infrared (IR) spectral analysis, and field-emission scanning electron microscopy (FESEM) thermo-gravimetrical analysis and differential thermal analysis (TGA, DTA). XRD and IR results showed that phase pure, nano crystalline Bikitaite zeolites were started forming after 3h irradiation and 72h of aging with a sonication energy of 150W and nano crystalline Bikitaite zeolite with prominent peaks were obtained after 6h irradiation of 250W sonic energy. The Brunauer-Emmett-Teller (BET) surface area of the powder by N2 adsorption-desorption measurements was found to be 209m2/g. The TEM micrograph and elemental analysis showed that desired atomic ratio of the zeolite was obtained after 6h irradiation. For comparison, sonochemical method, followed by the hydrothermal method, with same initial sol composition was studied. The effect of ultrasonic energy and irradiation time showed that with increasing sonication energy, and sonication time phase formation was almost completed. The FESEM images revealed that 50nm zeolite crystals were formed at room temperature. However, agglomerated particles having woollen ball like structure was obtained by sonochemical method followed by hydrothermal treatment at 100°C for 24h. The hydrogen adsorption capacity of Bikitaite zeolite with different Li content, has been investigated. Experimental results indicated that the hydrogen adsorption capacities were dominantly related to their surface areas as well as total pore volume of the zeolite. The hydrogen adsorption capacity of 143.2c.c/g was obtained at 77K and ambient pressure of (0.11MPa) for the Bikitaite zeolite with 100% Li, which was higher than the reported values for other zeolites. To the best of our knowledge, there is no report on the synthesis of a Bikitaite zeolite by sonochemical method for H2 storage.
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Regarding "Uremic Encephalopathy: MR Imaging Findings and Clinical Correlation". AJNR Am J Neuroradiol 2017; 38:E23-E24. [PMID: 28082265 DOI: 10.3174/ajnr.a5058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Comparison of Accelerated Versus Conventional Fractionated Chemoradiation Therapy in Locally Advanced Head and Neck Squamous Cell Carcinoma. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Surgical morbidity and clinical outcomes in ovarian cancer - the role of obesity. BJOG 2016; 123:300-8. [PMID: 26331299 DOI: 10.1111/1471-0528.13585] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2015] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate the effect of body mass index on the surgical outcomes in ovarian cancer patients. In addition, we performed a systematic review to compare our outcomes with the current literature. DESIGN Retrospective cohort study and a systematic review of the literature. SETTING Gynaecology department at the Royal Cornwall Hospital Trust. POPULATION Surgically managed stage I-IV ovarian cancer patients between September 2006 and September 2014. METHODS Primary and secondary outcome measures were evaluated across BMI categories; BMI <25 kg/m², BMI 25–29.9 kg/m², BMI ≥30 kg/m² and BMI ≥40 kg/m². A systematic review was performed according to Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. MAIN OUTCOME MEASURES The primary outcome measure was surgical complications. Secondary outcome measures were other intra- and postoperative outcomes. RESULTS Two hundred twenty-eight women were included in the study, of which 84 had a BMI <25 kg/m², 84 women had a BMI 25–29.9 kg/m², and 60 women were obese (BMI ≥30 kg/m²), 13 of whom were morbidly obese. Morbid obesity was associated with increased rates of wound complications. However, BMI did not show an association with other outcomes. In the review, an increasing BMI was associated with increased rates of wound complications and prolonged hospital stay, but did not impact other surgical outcomes. CONCLUSION Obesity is associated with increased rates of wound complications and a prolonged hospital stay, but does not appear to affect other operative outcomes including cytoreduction status and 30-day mortality. Therefore, operative management and postoperative care require a multifactorial approach to minimise adverse outcomes.
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Benchmarking of surgical complications in gynaecological oncology: prospective multicentre study. BJOG 2016; 123:2171-2180. [DOI: 10.1111/1471-0528.13994] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2015] [Indexed: 11/26/2022]
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Abstract
Here, we report a rare case of migration of a foreign body has occurred from loin to scrotum. A 35-year-old male patient presented with right sided scrotal mass, on exploration it was found to be a metallic bullet. The patient had a history of gunshot injury in his loin 8 years back and was treated conservatively that time. The probable explanation to this mysterious incident may be that, the bullet might have entered the peritoneal cavity through the loin, but did not cause any extensive damage, so the patient well responded to the initial conservative management. With time, due to changes in abdominal pressure or may be due to gravitational force, it had migrated to the dependent scrotum through the patent processus vaginalis. So, this case signifies that a foreign body can migrate through the body planes and get settled far from the primary place.
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Netting the malaria menace: Distribution and utilization of long-lasting insecticidal net in a malaria endemic area in Bankura, West Bengal. J Vector Borne Dis 2016; 53:23-29. [PMID: 27004575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
BACKGROUND & OBJECTIVES Long-lasting insecticidal net (LLIN) is considered to be a highly effective intervention against malaria under National Vector Borne Disease Control Programme in India. A cross-sectional study was undertaken to assess the coverage and utilization of LLIN and the factors related thereto. METHODS A survey of 1300 households was carried out in Ranibandh block of Bankura district in West Bengal, India, using lot quality assurance sampling (LQAS) method. Coverage/utilization of 80% was considered as minimum acceptable norm. The weighted sample size was calculated from each village of the block. The sociodemographic, economic information of the household along with the availability and use of LLIN was collected through interview and observation. RESULTS In total, 7320 individuals including 840 children ≤ 5 yr were visited. Overall coverage of adequate LLIN was 65.4% (± 1.5%) and for children ≤ 5 yr, it was 60.5% (± 1.3%). Overall, 66.1% (± 1.4%) people of all ages and 63.7% (± 1.4%) children ≤ 5 yr slept under LLINs in the night before the survey. Out of 26 sub-centres, distribution of LLINs in 10 sub-centres was below the accepted norm, whereas utilization was sub-optimal in 19 sub-centres. In only 18.2% (± 0.5%) households, LLINs remained hanging during daytime. Poverty, caste, education, perception regarding malarial morbidity and preventive action of LLIN were associated significantly with the distribution of LLIN. Similarly, poverty (AOR = 2.14), threat perception regarding malarial morbidity (AOR = 1.51) and mortality (AOR = 2.52) were positively associated with the use of LLIN. Full utilization of bednets by under-fives of the households was higher in villages with sub-centres. INTERPRETATION & CONCLUSION Around two-third population of the study area was effectively covered with LLIN. Higher proportion of socially marginalized people received LLIN. Threat perception regarding malaria was directly associated with both receipt and use of LLIN. Behaviour change communication on utilization along with adequate access to LLIN needs to be strengthened.
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Accessory spleen: A case report. J ANAT SOC INDIA 2015. [DOI: 10.1016/j.jasi.2015.07.193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Background: Most commonly practiced surgical “lay open” technique to treat fistula-in-ano (a common anorectal pathology) has high rate of recurrence and anal incontinence. Alternatively, a nonsurgical cost efficient treatment with Ksharasutra (cotton Seton coated with Ayurvedic medicines) has minimal complications. In our study, we have tried to compare these two techniques. Materials and Methods: A prospective randomized control study was designed involving patients referred to the Department of General Surgery in RG Kar Medical College, Kolkata, India, from January 2010 to September 2011. Results: Among 50 patients, 26 were in Ksharasutra and 24 were in fistulotomy group. 86% patients were male and 54% of the patients were in the fourth decade. About 74% fistulas are inter-sphincteric and 26% were of trans-sphincteric variety. Severe postoperative pain was more (7.7% vs. 25%) in fistulotomy group, while wound discharge was more associated with Ksharasutra group (15.3% vs. 8.3%). Wound scarring, bleeding, and infection rate were similar in both groups. Ksharasutra group took more time to heal (mean: 53 vs. 35.7 days, P = 0.002) despite reduced disruption to their routine work (2.7 vs. 15.5 days work off, P <0.001). Interestingly, pain experienced was less in Ksharasutra group, there was no open wound in contrast to fistulotomy and it was significantly cost effective (Rupees 166 vs. 464). Conclusion: Treatment of fistula-in-ano with Ksharasutra is a simple with low complications and minimal cost.
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Age-associated oxidative modifications of mitochondrial α-subunit of F1 ATP synthase from mouse skeletal muscles. Free Radic Res 2015; 49:954-61. [PMID: 25790938 DOI: 10.3109/10715762.2015.1017477] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The objective of this study was to investigate the pattern of age-associated oxidative post-translational modifications in the skeletal muscles of a mammalian species and to address whether the modifications result in the loss of function of the oxidatively modified protein(s). Accordingly, proteins in the mitochondrial matrix of the hind limb of C57BL/6Nnia mice were examined for modifications by carbonylation--an established marker of oxidative post-translational modifications--by Western blotting using anti-2,4-dinitrophenyl antibodies and tritiated sodium borohydride methods. An age-associated increase in carbonylation of mitochondrial matrix proteins was observed, but not all proteins were equally susceptible. A 55 kDa protein, identified as the α-subunit of the F1 complex of ATP synthase (ATP phosphohydrolase [H(+)-transporting]), had approximately 17% and 27% higher levels of protein carbonyls in adult and old animals, respectively, in comparison to the young controls as estimated using tritiated sodium borohydride. In addition, an age-associated decline in its activity was observed, with approximately 9% and 28% decrease in the activity in the adult and old animals, respectively, in comparison to young controls. It may be concluded that such oxidative post-translational modifications and the resultant attenuation of the protein activity may contribute to the age-related energy loss and muscular degeneracy.
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Predictors of complications in gynaecological oncological surgery: a prospective multicentre study (UKGOSOC-UK gynaecological oncology surgical outcomes and complications). Br J Cancer 2015; 112:475-84. [PMID: 25535730 PMCID: PMC4453652 DOI: 10.1038/bjc.2014.630] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 11/16/2014] [Accepted: 11/30/2014] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND There are limited data on surgical outcomes in gynaecological oncology. We report on predictors of complications in a multicentre prospective study. METHODS Data on surgical procedures and resulting complications were contemporaneously recorded on consented patients in 10 participating UK gynaecological cancer centres. Patients were sent follow-up letters to capture any further complications. Post-operative (Post-op) complications were graded (I-V) in increasing severity using the Clavien-Dindo system. Grade I complications were excluded from the analysis. Univariable and multivariable regression was used to identify predictors of complications using all surgery for intra-operative (Intra-op) and only those with both hospital and patient-reported data for Post-op complications. RESULTS Prospective data were available on 2948 major operations undertaken between April 2010 and February 2012. Median age was 62 years, with 35% obese and 20.4% ASA grade ⩾3. Consultant gynaecological oncologists performed 74.3% of operations. Intra-op complications were reported in 139 of 2948 and Grade II-V Post-op complications in 379 of 1462 surgeries. The predictors of risk were different for Intra-op and Post-op complications. For Intra-op complications, previous abdominal surgery, metabolic/endocrine disorders (excluding diabetes), surgical complexity and final diagnosis were significant in univariable and multivariable regression (P<0.05), with diabetes only in multivariable regression (P=0.006). For Post-op complications, age, comorbidity status, diabetes, surgical approach, duration of surgery, and final diagnosis were significant in both univariable and multivariable regression (P<0.05). CONCLUSIONS This multicentre prospective audit benchmarks the considerable morbidity associated with gynaecological oncology surgery. There are significant patient and surgical factors that influence this risk.
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Pore modification of deca-dodecasil-rhombohedral zeolite membrane by carbon loading from in situ decomposition of 1-adamantanamine for improved gas separation. RSC Adv 2015. [DOI: 10.1039/c5ra08773b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Carbon loading by decomposition of 1-adamantanamine in the pores of a DDR zeolite membrane increases H2–CO2 permeance and separation efficiency.
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Mercaptoundecanoic acid capped palladium nanoparticles in a SAPO 34 membrane: a solution for enhancement of H₂/CO₂ separation efficiency. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20717-20728. [PMID: 25353317 DOI: 10.1021/am5045345] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work, the high quality Pd/SAPO 34 membranes were grown on the support using a secondary (seeded) growth hydrothermal technique followed by insertion of 11-mercaptoundecanoic acid capped palladium (MUA-Pd) nanoparticles (NPs) to the membrane surface. For this, first, the indigenous low cost clay-alumina support was treated with poly diallyldimethylammonium chloride (PolyDADMAC) polymer, and subsequently, a seed layer of SAPO 34 crystals was deposited homogeneously in a regular orientation. Since PolyDADMAC is a high charge density cationic polymer, it assisted in reversing the charge of the support surface and produced an attractive electrostatic interaction between the support and zeolite crystals. This may facilitate the zeolite grain orientation in the synthesized membrane layer. Here, the Pd NPs were deposited in the membrane matrix by a simple dip-coating method. After thermal treatment of the Pd/SAPO 34 membrane, the defects were formed because of the removal of the structure-directing agent (SDA) from the zeolite pores but the presence of Pd NPs, which were entrapped inside the nonzeolitic pores and clogged the defects of the membrane. Field emission scanning electron microscopy (FESEM) and elemental mapping of the membrane cross-section confirmed that most of the Pd NPs were deposited at the interface of the membrane and the support layer which may increase the membrane efficiency, i.e., separation factor, as well as permeability of H2 through the membrane. As the membrane structure was associated with the oriented crystal, the pores were more aligned and permeation adequacy of H2 through the membrane enhanced. These membranes have a relative hydrogen permeance of 14.8 × 10(-7) mol·m(-2)·s(-1)·Pa(-1). The selectivity of H2/CO2 based on single gas permeation was 10.6, but for the mixture gas (H2/CO2 55:45), the H2/CO2 mixture separation factor increased up to 20.8 at room temperature. It is anticipated that this technique may be useful for making a defect free membrane and also a hydrogen selective Pd loaded membrane with lower cost (as the quantity of Pd is low) which can be utilized for a "clean energy" related application.
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Leucocyte complement receptor 1 (CR1/CD35) transcript and its correlation with the clinical disease activity in rheumatoid arthritis patients. Clin Exp Immunol 2014; 176:327-35. [PMID: 24433281 DOI: 10.1111/cei.12274] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2014] [Indexed: 12/22/2022] Open
Abstract
In view of the exaggerated complement activation in rheumatoid arthritis (RA) and significance of complement receptor 1 (CR1/CD35) as a complement regulatory protein (CRP), we aimed to determine the leucocyte-complement receptor 1 (L-CR1) transcript levels and the relationship of this protein with the clinical disease activity of RA patients. Sixty-six controls and 45 RA patients were enrolled. L-CR1 transcript levels were correlated with the levels of circulating immune complexes (CIC), C3, C4 and C3d in controls and patients and with disease activity score 28 (DAS28) in patients only. CIC levels were determined by polyethylene glycol (PEG) precipitation, C3 and C4 levels by nephlometry and C3d levels by enzyme-linked immunosorbent assay (ELISA). Eleven patients were recruited for follow-up of L-CR1 and DAS28 levels at weeks 0, 12 and 24. Appropriate statistical methods were used for the data analysis. L-CR1 (P < 0·01) transcript levels were decreased in patients compared to controls. L-CR1 levels correlated negatively with DAS28, CIC and C3d. DAS28 correlated positively with levels of CIC, C3 and C3d. Levels of CIC correlated positively with C3 and C3d. Levels of C3 correlated positively with C3d in patients and with C4 in both controls and patients. Levels of L-CR1 increased with decline in DAS28 scores in follow-up patients. Observations were statistically significant. Lower levels of L-CR1 transcript in patients compared to controls, their correlations with the levels of CIC, C3d and DAS28 at different time-points in RA patients suggest CR1 as a potential disease marker for RA.
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Medicinal plant exudativory by the Bengal slow loris Nycticebus bengalensis. ENDANGER SPECIES RES 2014. [DOI: 10.3354/esr00560] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Quantitative Mueller matrix fluorescence spectroscopy for precancer detection. OPTICS LETTERS 2014; 39:243-6. [PMID: 24562117 DOI: 10.1364/ol.39.000243] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Quantitative fluorescence spectroscopic Mueller matrix measurements from the connective tissue regions of human cervical tissue reveal intriguing fluorescence diattenuation and polarizance effects. Interestingly, the estimated fluorescence linear diattenuation and polarizance parameters were considerably reduced in the precancerous tissues as compared to the normal ones. These polarimetry effects of the autofluorescence were found to originate from anisotropically organized collagen molecular structures present in the connective tissues. Consequently, the reduction of the magnitude of these polarimetric parameters at higher grades of precancer was attributed to the loss of anisotropic organization of collagen, which was also confirmed by control experiments. These results indicate that fluorescence spectral diattenuation and polarizance parameters may serve as potentially useful diagnostic metrics.
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Sonication mediated hydrothermal process – an efficient method for the rapid synthesis of DDR zeolite membranes. RSC Adv 2014. [DOI: 10.1039/c3ra47558a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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An experience with 156 patients attending a newly organized pain and palliative care clinic in a tertiary hospital. Indian J Cancer 2013; 49:293-7. [PMID: 23238147 DOI: 10.4103/0019-509x.104491] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
CONTEXT Pain and palliative care clinic (PCC). AIMS The primary object of this study was to enumerate the demographic characteristics of patients attending a newly organized PCC. The secondary purpose was to detect symptom prevalence and frequency of different cancers in these patients. SETTINGS AND DESIGN Prospective cross-sectional descriptive study. MATERIALS AND METHODS A prospective cross-sectional descriptive study was done on patients referred to the PCC of a tertiary hospital in North India. Comprehensive details of all patients were recorded systematically on the first visit on a proforma specially prepared for the newly established palliative care clinic. STATISTICAL ANALYSIS USED The descriptive statistics of palliative care data was presented in terms of frequencies and percentages (%) for categorical variables. RESULTS The data collected at our PCC showed that out of 156 patients, 87 were males and 69 were females. Patients of all ages varying from 6 to 85 years were seen. Most patients (82.1%) lived with their families, and 28 (17.1%) patients lived alone and had no financial support. The most common primary diagnoses were head and neck cancers (38.5%), carcinoma cervix (15.4%), breast cancer (10.3%), colorectal cancer (6.4%), and lung cancer (4.5%). Frequency of seven most common symptoms was pain (100%), insomnia (64.1%), loss of appetite (34.6%), nausea (32.7%), vomiting (32.1%), constipation (31.4%) and sore mouth (28.8%). CONCLUSIONS Population-based studies determine the actual magnitude of sufferers and suffering and show that palliative care services should be included as an essential component in a tertiary care hospital. The objective should be to reach out to the patient and help in improving the patent's quality of life in every way possible.
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Infant and Young Child Feeding Perceptions and Practices among Mothers in a Rural Area of West Bengal, India. Ann Med Health Sci Res 2013; 3:370-5. [PMID: 24116316 PMCID: PMC3793442 DOI: 10.4103/2141-9248.117955] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background: There are many wrong practices and perceptions of Infant and Young Child Feeding (IYCF) prevalent among different socio-demographic groups. Aim: To observe IYCF perceptions and practices among mothers in a rural area of West Bengal. Subjects and Methods: Clinic-based cross-sectional descriptive study by interviewing mothers of 0-23 month old children. Appropriate response to each selected key question was assigned a score of + 1 for objective assessment. Data analysis was done by standard statistical methods using the statistical software SPSS 13.0 (Kolkata, India) for windows version. Percentages were calculated for descriptive statistics. Chi-square test of significance was employed whenever required. Results: 65.8% (225/342) mothers did not initiate breast feeding within 1 h of birth, 41.7% (90/216) mothers of children aged 6 months or more did not exclusively breastfeed their babies up to 6 months and 28.1% (96/342) used bottles for baby-feeding. Perception scores among younger than 20-year-old mothers were found to be highest; however, practice score increased significantly with age. Though perception and practice of mothers with some education were significantly better they wane with higher education. Lowest practice score was found in the richest per capita income group. Conclusion: Emphasis should be given to IYCF education sessions.
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