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- 저자 : K. M. Patel (검색결과 32 건)
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Dharmik M. Mehta,Punit B. Parejiya,Hetal K. Patel,Palak J. Trivedi,Disha D. Suthar,Pragna K. Shelat 한국약제학회 2016 Journal of Pharmaceutical Investigation Vol.46 No.5
Present study attempts to overcome pH-dependent solubility, a limitation for oral delivery of poorly soluble BCS class-II drugs. A pH independent, patient compliant, dual working gastroretentive drug delivery system of model drug quetiapine fumarate (QF) was fabricated by unique combination approach of mucoadhesion and floating. Bilayer tablets comprising floating adhesive layer (FL) and matrix layer (ML) was systematically optimized by applying 32 full factorial experimental designs. Selected variables for FL: Polyox 303WSR (X1FL) and alginate beads (X2FL), and for ML: HPMC K100M (X1ML) and fumaric acid (X2ML) were studied against responses for FL: floating lag time (R1FL), total floating time (R2FL) and adhesion force (R3FL) and for ML: percentage drug released at 2 h—Q2h (R1ML), 8 h—Q8h (R2ML), and 18 h—Q18h (R3ML), respectively. Optimized batch (OP) showed floating lag time (6.5 h), total floating time (14 h), adhesion force (0.82 N) and Q18h ([90 %). Pharmacokinetic study of OP and immediate release market product demonstrated improved bioavailability (*12 % higher AUC0–?) of OP. In a nutshell, developed drug delivery system can be fabricated as a platform for QF and similar BCS class-II drugs with pH dependent solubility.
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Patel, R.,Patel, M.,Ahn, S.H.,Sung, Y.K.,Lee, H.K.,Kim, J.H.,Sung, J.S. Elsevier 2013 Materials science & engineering. C, Materials for Vol.33 No.3
Poly(vinyl chloride) (PVC) membrane was hydrophilically modified by grafting with poly(oxyethylene methacrylate) (POEM) using atom transfer radical polymerization (ATRP). The successful grafting of PVC main chain by POEM was characterized by Fourier transform infrared spectroscopy (FT-IR). The molecular weight and hydrophilicity of membranes increased with the amount of POEM grafting, as characterized by gel permeation chromatography (GPC) and contact angle measurement, respectively. Transmission electron microscope (TEM) and small angle X-ray scattering (SAXS) analysis revealed the microphase-separated structure of PVC-g-POEM and the domain spacing increased from 59.3 to 86.1nm with increasing grafting degree. Scanning electron microscopy (SEM) was used for the direct visualization of the mouse embryonic fibroblast (MEF) cell and bacteria adhesion on the membrane surface. Protein adsorption and eukaryotic and prokaryotic cell adhesion tests showed that the bioinert properties of membranes were significantly increased with POEM content.
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Urvish K. Patel,Michelle H. Zhang,Karan Patel,Preeti Malik,Mansi Shah,Bakhtiar M. Rasul,Anam Habib,Liseth Lavado,Tapan Kavi,Prasanna Tadi,Vishal Jani,Abhishek Lunagariya 대한신경과학회 2020 Journal of Clinical Neurology Vol.16 No.2
Several indexes are used to classify physician burnout, with the Maslach Burnout Inventory currently being the most widely accepted. This index measures physician burnout based on emotional exhaustion, detachment from work, and lack of personal achievement. The overall percentage of physicians with burnout is estimated to be around 40%, but the proportion varies between specialties. Neurology currently has the second-highest rate of burnout and is projected to eventually take the top position. The purpose of this review is to provide a comprehensive overview focusing on the causes and ramifications of burnout and possible strategies for addressing the crisis. Several factors contribute to burnout among neurologist, including psychological trauma associated with patient care and a lack of respect compared to other specialties. Various interventions have been proposed for reducing burnout, and this article explores the feasibility of some of them. Burnout not only impacts the physician but also has adverse effects on the overall quality of patient care and places a strain on the health-care system. Burnout has only recently been recognized and accepted as a health crisis globally, and hence most of the proposed action plans have not been validated. More studies are needed to evaluate the long-term effects of such interventions.
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Neutral beam injector system for Steady State Tokamak -1
S. K. Mattoo,A.K. Chakraborty,B. Prajapati,BVSNNP Sridhar,C. Rotti,Ch. Chakrapani,G. Patel,M. Bandyopadhyay,M.J. Singh,M.R. Jana,N.P. Singh,P. Bharati,P.J. Patel,P.K. Jayakumar,R. Onali,S. Ramababu,S. 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
This paper discusses the experimental results obtained from the various components developed for a 1.7 MW neutral beam injector (NBI). Several technologies related to fabrication of back plate, extractor grids, high-current filament feedthru’s, heat-transfer elements, ceramic insulators, cryopumps, rectangular vessels and power supplies have been developed in collaboration with the Indian industry. Control experiments on the prototype plasma box are described.
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Niraj A. Shah,Laxit K. Bhatt,Rajesh J. Patel,Tushar M. Patel,Nayankumar V. Patel,Harshida G. Trivedi,Nilam R. Patel,Jitendra H. Patel,Satish D. Patel,Rajesh S. Sundar,Mukul R. Jain 한국실험동물학회 2022 Laboratory Animal Research Vol.38 No.4
Background: Nonhuman primates are used for research purposes such as studying diseases and drug discovery and development programs. Various clinical pathology parameters are used as biomarkers of disease conditions in biomedical research. Detailed reports of these parameters are not available for Indian-origin rhesus macaques. To meet the increasing need for information, we conducted this study on 121 adult Indian rhesus macaques (57 wild-sourced and 64 inhouse animals, aged 3–7 years). A total of 18 hematology and 18 biochemistry parameters were evaluated and reported in this study. Data from these parameters were statistically evaluated for significance amongst inhouse and wild-born animals and for differences amongst sexes. The reference range was calculated according to C28-A3 guidelines for reporting reference intervals of clinical laboratory parameters. Results: Source of the animals and sex appeared to have statistically significant effects on reference values and range. Wild-born animals reported higher WBC, platelets, neutrophils, RBC, hemoglobin, HCT, MCV, and total protein values in comparison to inhouse monkeys. Sex-based differences were observed for parameters such as RBCs, hemoglobin, HCT, creatinine, calcium, phosphorus, albumin, and total protein amongst others. Conclusions: Through this study, we have established a comprehensive data set of reference values and intervals for certain hematological and biochemical parameters which will help researchers in planning, conducting, and interpreting various aspects of biomedical research employing Indian-origin rhesus monkeys.
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Punit B. Parejiya,Bhavesh S. Barot,Hetal K. Patel,Dharmik M. Mehta,Pragna K. Shelat,Arunkumar Shukla 한국약제학회 2014 Journal of Pharmaceutical Investigation Vol.44 No.3
In present day, availability of various carriers,innovative techniques of production and plenty of solventssupport the growth of solid dispersion (SD) technology inpharmaceutical industries to overcome many issues. Thepresent study was aimed to develop SD based sustainedrelease system of Milnacipran HCl (MH). The SD containingethyl cellulose, Eudragit RLPO and Eudragit RSPOat drug–polymer ratios of 1:1, 1:2, and 1:3 were developedusing solvent evaporation technique and different waxes atratio of 1:1, 1:1.25, 1:1.5 and 1:1.75 with drug weredeveloped by melting method. The physicochemicalproperties of SD were evaluated using Fourier transforminfrared spectroscopy (FTIR), differential scanning calorimetry(DSC) and X-ray diffraction (XRD). The desiredSD batch was further compressed into tablet unit to achievepredetermined once a day drug release. Tablets preparedwere evaluated for physicochemical parameters, in vitrodrug release, drug release kinetics and scanning electronmicroscopy. Out of selected carriers, bees wax had shownmaximum release retardation. The results of FTIR, DSCand XRD studies exhibited poor interaction amongst MH–bees wax and retention of crystalline state of MH in SDsystem. The presence of Benecel (HPMC K 200 M;75 mg) in tablets comprising SD (1:1.25, MH:bees wax)revealed remarkable drug release extension and it wasconsidered an optimal. The later was submitted to shortterm stability study and its results indicated the stablecharacteristic of system. Drug release from optimizedformulation fitted well into Higuchi model with anomalousdiffusion. The compressed unit of SD system of highlywater soluble drug can be successful single day regimen.
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Novel pre-peroral endoscopic myotomy preparation for esophageal clearance: Simple yet effective!
Pankaj N. Desai,Chintan N. Patel,Mayank V. Kabrawala,Rajiv M. Mehta,Subhash K. Nandwani,Ritesh M. Prajapati,Nisharg B. Patel,Krishna K. Parekh 소화기인터벤션의학회 2021 International journal of gastrointestinal interven Vol.10 No.1
Background: Having a clean esophagus is an integral part of the peroral endoscopic myotomy (POEM) procedure for ensuring safety and success. Conventional preparation is a tricky, because there is no defined definite timeline of fasting for the different types of achalasia. The present study introduces a simple yet effective preparation of esophageal clearance. Methods: All patients who underwent POEM were included. Patients were stratified in novel and conventional preparation groups by a random selection. In the novel preparation, the cases were maintained on lukewarm water and carbonated drink followed by nil per oral (NPO) prior to the procedure. In conventional preparation, the controls were maintained on clear liquid followed by NPO. Success rate of preparation and procedure related outcomes were compared using independent t tests and chi-squared tests. Results: A total of 150 patients (male 54.0%; mean age 41.2 ± 15.5 years) were included in the study. Known baseline and clinical factors which could affect esophageal clearance were evenly distributed between the two groups. Novel preparation had provided absolute esophageal clearance (97.3%) without the requirement of pre-POEM endoscopic cleaning. Moreover, Novel preparation demonstrates several advantages over the conventional preparation: decreased anesthesia aspiration risk (P < 0.0001), reduced preoperative hospitalization (P < 0.0001), and hospital stays (P < 0.005). Conclusion: Evidently, the novel preparation is very simple, efficient, safe and appropriate for all types of achalasia. Moreover, novel preparation provides absolute esophageal clearance without requiring prolonged period of liquid diet, fasting and pre-POEM endoscopic cleaning.
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Pankaj N. Desai,Chintan N. Patel,Mayank V. Kabrawala,Subhash K. Nandwani,Rajiv M. Mehta,Ritesh M. Prajapati,Nisharg B. Patel,Krishna K. Parekh,Neha D. Sheth 소화기인터벤션의학회 2021 International journal of gastrointestinal interven Vol.10 No.1
Background: To assess the usefulness of endoscopic pancreatography without contrast agents and efficacy of transpapillary intervention for pancreatic duct (PD) rupture in chronic pancreatitis. Methods: We retrospectively analyzed all cases of chronic pancreatitis with ductal rupture causing ascites, effusions and pseudocysts. We performed magnetic resonance cholangiopancreatography (MRCP) and endoscopic retrograde pancreatography (ERP) without contrast. Results observed based on the possibility of wire crossing the leak or not and their resolutions were noted. Results: We performed ERP in 1,324 patients. Ductal disruptions in 321/1,324 (24.2%). We divided cases into two groups. Group 1 involves disruptions causing ascites in 60 cases (18.7%) and effusions in 34 cases (10.6%), and group 2 involves pseudocysts in 227 cases (70.7%). In group 1, 82 patients (87.2%) experienced successful cannulation of PD. Leak crossed in 70 (74.5%) with complete resolution in all. Leak did not cross in 12 cases of which 8 (8.5%) installed stents resolved while four (4.3%) did not resolve. In group 2, 219 (96.5%) PD cannulated. Leak did not cross but stents put in cyst (176, 77.5%). Complete resolution occurred without infection. Leaks were crossed in 43 (18.9%); complete resolution, 14 (32.6%). Complete regression was not achieved in 19 (8.3%). Eight cysts were not resolved (3.5%). Transmural drainage was done. Infection was noted in 2 cases (0.9%). Sites of leak in pseudocysts were jenu & body, 167 (73.6%); tail, 60 (26.4%). We recorded pancreas divisum in 24/321 (7.5%). ERP failed in 20 (6.2%). Three were managed medically (1.3%), 5 with distal pancreatectomy (2.2%), 4 with lateral pancreatico jejunostomy (1.8%), and 8 with transmural drainage (3.5%). Conclusion: PD rupture in chronic pancreatitis can be managed transpapillary, without any contrast during ERP. In majority, endosonography aspiration and transmural drainage are needed only when transpapillary fails. Leak from tail responded better than those from proximal duct with ERP.
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Pankaj N. Desai,Chintan N. Patel,Mayank V. Kabrawala,Subhash K. Nandwani,Rajiv M. Mehta,Ritesh M. Prajapati,Nisharg B. Patel,Krishna K. Parekh,Neha D. Sheth 소화기인터벤션의학회 2021 Gastrointestinal Intervention Vol.10 No.1
Background: To assess the usefulness of endoscopic pancreatography without contrast agents and efficacy of transpapillary intervention for pancreatic duct (PD) rupture in chronic pancreatitis. Methods: We retrospectively analyzed all cases of chronic pancreatitis with ductal rupture causing ascites, effusions and pseudocysts. We performed magnetic resonance cholangiopancreatography (MRCP) and endoscopic retrograde pancreatography (ERP) without contrast. Results observed based on the possibility of wire crossing the leak or not and their resolutions were noted. Results: We performed ERP in 1,324 patients. Ductal disruptions in 321/1,324 (24.2%). We divided cases into two groups. Group 1 involves disruptions causing ascites in 60 cases (18.7%) and effusions in 34 cases (10.6%), and group 2 involves pseudocysts in 227 cases (70.7%). In group 1, 82 patients (87.2%) experienced successful cannulation of PD. Leak crossed in 70 (74.5%) with complete resolution in all. Leak did not cross in 12 cases of which 8 (8.5%) installed stents resolved while four (4.3%) did not resolve. In group 2, 219 (96.5%) PD cannulated. Leak did not cross but stents put in cyst (176, 77.5%). Complete resolution occurred without infection. Leaks were crossed in 43 (18.9%); complete resolution, 14 (32.6%). Complete regression was not achieved in 19 (8.3%). Eight cysts were not resolved (3.5%). Transmural drainage was done. Infection was noted in 2 cases (0.9%). Sites of leak in pseudocysts were jenu & body, 167 (73.6%); tail, 60 (26.4%). We recorded pancreas divisum in 24/321 (7.5%). ERP failed in 20 (6.2%). Three were managed medically (1.3%), 5 with distal pancreatectomy (2.2%), 4 with lateral pancreatico jejunostomy (1.8%), and 8 with transmural drainage (3.5%). Conclusion: PD rupture in chronic pancreatitis can be managed transpapillary, without any contrast during ERP. In majority, endosonography aspiration and transmural drainage are needed only when transpapillary fails. Leak from tail responded better than those from proximal duct with ERP.
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Novel pre-peroral endoscopic myotomy preparation for esophageal clearance: Simple yet effective!
Pankaj N. Desai,Chintan N. Patel,Mayank V. Kabrawala,Rajiv M. Mehta,Subhash K. Nandwani,Ritesh M. Prajapati,Nisharg B. Patel,Krishna K. Parekh 소화기인터벤션의학회 2021 Gastrointestinal Intervention Vol.10 No.1
Background: Having a clean esophagus is an integral part of the peroral endoscopic myotomy (POEM) procedure for ensuring safety and success. Conventional preparation is a tricky, because there is no defined definite timeline of fasting for the different types of achalasia. The present study introduces a simple yet effective preparation of esophageal clearance. Methods: All patients who underwent POEM were included. Patients were stratified in novel and conventional preparation groups by a random selection. In the novel preparation, the cases were maintained on lukewarm water and carbonated drink followed by nil per oral (NPO) prior to the procedure. In conventional preparation, the controls were maintained on clear liquid followed by NPO. Success rate of preparation and procedure related outcomes were compared using independent t tests and chi-squared tests. Results: A total of 150 patients (male 54.0%; mean age 41.2 ± 15.5 years) were included in the study. Known baseline and clinical factors which could affect esophageal clearance were evenly distributed between the two groups. Novel preparation had provided absolute esophageal clearance (97.3%) without the requirement of pre-POEM endoscopic cleaning. Moreover, Novel preparation demonstrates several advantages over the conventional preparation: decreased anesthesia aspiration risk (P < 0.0001), reduced preoperative hospitalization (P < 0.0001), and hospital stays (P < 0.005). Conclusion: Evidently, the novel preparation is very simple, efficient, safe and appropriate for all types of achalasia. Moreover, novel preparation provides absolute esophageal clearance without requiring prolonged period of liquid diet, fasting and pre-POEM endoscopic cleaning.
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