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A cadaveric model for transesophageal echocardiography transducer placement training: A pilot study

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World Journal of Emergency Medicine 2022年第1期13卷 18-22页

作者： Ryan W.horton Kian R.niknam Viveta Lobo Kathryn h.Pade Drew Jones Kenton L.Anderson Department of Emergency Medicine Stanford University School of MedicinePalo Alto 94304USA Emergency Medicine Residency Program University of Texas at Austin Dell Medical SchoolAustin 78756USA University of California San Francisco School of Medicine San Francisco 94143USA Department of Emergency Medicine Rady Children’s HospitalSan Diego 92123USA Department of Emergency Medicine University of Central Florida/HCA Ocala RegionalOcala 34471USA

BACKGROUND: Transesophageal echocardiography(TEE) is used in the emergency department to guide resuscitation during cardiac arrest. Insertion of a TEE transducer requires manual skill and experience, yet in some residency programs cardiac arrest is uncommon, so some physicians may lack the means to acquire the manual skills to perform TEE in clinical practice. For other infrequently performed procedural skills, simulation models are used. however, there is currently no model that adequately simulates TEE transducer insertion. The aim of this study is to evaluate the feasibility and efficacy of using a cadaveric model to teach TEE transducer placement among novice ***: A convenience sample of emergency medicine residents was enrolled during a procedure education session using cadavers as tissue models. A pre-session assessment was used to determine prior knowledge and confidence regarding TEE manipulation. Participants subsequently attended a didactic and hands-on education session on TEE placement. All participants practised placing the TEE transducer until they were able to pass a standardized assessment of technical skill(SATS). After the educational session, participants completed a post-session assessment. RESULTS: Twenty-five residents participated in the training session. Mean assessment of knowledge improved from 6.2/10 to 8.7/10(95% confidence interval [CI] of knowledge difference 1.6–3.2, Phere was no relationship between training level and the delta in knowledge or ***: In this pilot study, the use of a cadaveric model to teach TEE transducer placement methods among novice users is feasible and improves both TEE manipulation knowledge and confidence levels.

关键词： Cardiopulmonary resuscitation Echocardiography Education Simulation

Synthesis of some new bis-3,4-dihydropyrimidin-2(1h)-ones by using silica-supported tin chloride and titanium tetrachloride

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Chinese Chemical Letters 2010年第4期21卷 399-402页

作者： khodaba.h.h niknam Alireza hasaninejad Madihe Arman Department of Chemistry Faculty of SciencesPersian Gulf University

Silica-supported tin chloride and titanium tetrachloride were prepared by the reaction of tin chloride and titanium tetrachloride with activated silica gel in refluxing *** solid acids have been employed as the catalysts for the synthesis of bisdihydropyrimidin -2(1h)-ones from aromatic dialdehydes,1,3-dicarbonyl compounds and urea at 90℃under solvent-free conditions.

关键词： Silica-supported tin chloride Silica-supported titanium tetrachloride Bis-3 4-dihydropyrimidin-2(1h)-one Solvent-free 1 3-Dicarbonyl compounds

Silica-bonded S-sulfonic Acid as a Recyclable Catalyst for Synthesis of 2,3-Dihydroquinazolin-4（1h）-ones

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Chinese Journal of Chemistry 2011年第7期29卷 1417-1422页

作者： niknam, khodaba.h.h Mohammadizadeh, Mohammad Reza Mirzaee, Salimeh Chemistry Department Faculty of Sciences Persian Gulf University Bushehr 75169 Iran

2,3-Dihydroquinazolin-4（1h）-one derivatives were synthesized via a one-pot, three component reaction of isatoic anhydride and an aromatic aldehyde with ammonium acetate or primary amine catalyzed by silica-bonded S-sulfonic acid in ethanol at 80 ℃. The reaction work-up is simple and the catalyst is easily separated from the products by filtration. The heterogeneous catalyst was recycled for ten runs upon the condensation reaction of isa- toic anhydride and 4-chlorobenzaldehyde with ammonium acetate without losing its catalytic activity.

关键词： silica-bonded S-sulfonic acid aldehydes 2,3-dihydroquinazolin-4(1h)-one isatoic anhydride amines

Sulfuric acid {[3-(3-silicapropyl)sulfanyl]propyl}ester a recyclable catalyst for the synthesis of 2-aryl- 1-arylmethyl- 1h- 1,3-benzimidazole derivatives

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Chinese Chemical Letters 2011年第10期22卷 1151-1154页

作者： Nasir Iravani Negar Safikhani Mohammadzade khodaba.h.h niknam Department of Chemistry Islamic Azad UniversityGachsaran BranchGachsaranIran

A highly selective synthesis of 2-aryl-1-arylmethyl-1h-1,3-benzimidazoles from the reaction of o-phenylenediamine and aromatic aldehydes in the presence of sulfuric acid{[3-(3-silicapropyl)sulfanyl]propyl}ester(SASPSP... 详细信息

关键词： Sulfuric acid{[3-(3-silicapropyl)sulfanyl]propyl}ester 2-Aryl-1-arylmethyl-1h-1 3-benzimidazoles Aldehydes o-Phenylenediamine Water

Synthesis of 2-Aryl-l-arylmethyl-lh-1,3-benzimidazole Derivatives Using Silica-bonded PropyI-S-sulfonic Acid as Recyclable Solid Acid Catalyst

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Chinese Journal of Chemistry 2012年第3期30卷 517-521页

作者： Ghaem Ahmadi-Ana,Sayed Mohammad Baghernejad,Mojtaba niknam,khodaba.h.h Chemistry Department Gachsaran BranchIslamic Azad UniversityGachsaranIran Chemistry Department Faculty of SciencesPersian Gulf UniversityBushehr75169Iran

A highly selective synthesis of 2-aryl-l-arylmethyl-lh-1,3-benzimidazoles from the reaction of o-phenylene- diamine and aromatic aldehydes in the presence of silica-bonded propyl-S-sulfonic acid （SBSSA） at 80℃ in w... 详细信息

关键词： silica-bonded propyl-S-sulfonic acid aldehydes 2-aryl- 1-arylmethyl-lh-1,3-benzimidazoles,o-phenylenediamine water

硅胶键合N-丙基哌嗪n-丙酸钠作为可循环使用催化剂催化4h-吡喃衍生物合成(英文)

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催化学报 2013年第12期34卷 2245-2254页

作者： khodaba.h.h niknam Nassim Borazjani Reza Rashidian Abbas Jamali Department of Chemistry Faculty of Sciences Persian Gulf University Presian Gulf Reaserch and Studies Center Persian Gulf University

Silica‐bonded N‐propylpiperazine sodium n‐propionate(SBPPSP) was found to act as an efficient solid base for the preparation of a series of 4h‐benzo[b]pyran derivatives. SBPPSP was used as a recyclable heterogeneous solid base catalyst for the synthesis of 3,4‐dihydropyrano[c]chromenes, 2‐amino‐4h‐pyrans, 1,4‐dihydropyrano[2,3‐c]pyrazoles, and 2‐amino‐4h‐benzo[e]‐chromenes via the condensation reaction of dimedone, ethyl acetoacetate, 3‐methyl‐1‐phenyl‐1h‐pyrazol‐5(4h)‐ one, and α‐naphthol, respectively, with aromatic aldehydes and malononitrile in refluxing aqueous ethanol. The heterogeneous solid base showed similar efficiency when reused in consecutive reactions.

关键词： Silica‐bonded n‐propylpiperazine sodium n‐propionate heterogeneous solid base catalyst Aldehyde 4h‐Pyran derivative Malononitrile

((3-(3-硅胶丙基)硫基)丙基)硫酸酯作为可回收催化剂用于合成4,4'-芳亚甲基-双(1h-吡唑-5-醇)(英文)

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催化学报 2011年第9期32卷 1477-1483页

作者： Shekoofeh TAYEBI Mojtaba BAGhERNEJAD Dariush SABERI khodaba.h.h niknam Department of Chemistry Islamic Azad University Gachsaran Branch Gachsaran Iran Department of Chemistry Faculty of Sciences Persian Gulf University

Sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl)ester is employed as a recyclable catalyst for the condensation reaction between aromatic aldehydes and 3-methyl-l-phenyl-5-pyrazolone. This condensation reaction was performed in ethanol under refluxing conditions giving 4,4'-alkylmethylene-bis(3-methyl-5-pyrazolones) in 74-90% yields. The heterogeneous catalyst was recycled and used in eleven runs for the reaction between benzaldehyde and 3-methyl-l-phenyl-5-pyrazolone without losing catalytic activity.

关键词： sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl)ester silica-bonded N-propyl sulfamic acid 3-methyl-l-phenyl-5-pyrazolone aldehydes

以金属硫酸氢盐为催化剂在无溶剂条件下高效合成3,4-二氢嘧啶-2(1h)-酮

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催化学报 2007年第7期28卷 591-595页

作者： khodaba.h.h niknam Mohammad Ali ZOLFIGOL Zahra hOSSIENINEJAD Nader DANEShVAR 波斯湾大学科学院化学系布-阿里大学化学学院

以金属硫酸氢盐M(hSO4)n(Ca(hSO4)2,Zn(hSO4)2和过硫酸氢钾制剂oxone○R)为催化剂催化醛、1,3-二羰基化合物和尿素进行缩合反应,在90℃及无溶剂的条件下高收率、一锅法合成了3,4-二氢嘧啶-2(1h)-酮.

关键词：金属硫酸氢盐 Biginelli反应二氢嘧啶无溶剂硫酸氢钙硫酸氢锌过硫酸氢钾制剂

Ultrafine and fine particle emission in turning titanium metal matrix composite(Ti-MMC)

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Journal of Central South University 2019年第6期26卷 1563-1572页

作者： Seyed Ali niknam Masoud SABERI Jules KOUAM Ramin hAShEMI Victor SONGMENE Marek BALAZINSKI School of Mechanical Engineering Iran University of Science and TechnologyHengam St.Resalat SquareFehran 13114-16846Iran Department of Mechanical Engineering Ecole de Technologie Superieure (ETS)MontrealQCH3C 1K3Canada Department of Mechanical Engineering Polytechnique MontrealMontrealQCH3T 1J4Canada

Titanium metal matrix composite(Ti-MMC)has excellent features and capabilities which can be considered a potential candidate to replace commercial titanium and superalloys within an extensive range of products and industrial *** of the superior features in Ti-MMC,however,referring to several factors including high unit cost and existence of rigid and abrasive ceramic particles in the generated matrices of the work part,the Ti-MMC is grouped as extremely difficult to cut with a poor level of ***,adequate process parameters for machining Ti-MMCs under several lubrication methods are rarely ***,adequate knowledge of this regard is strongly *** machinability attributes,ultrafine particles(UFPs)and fine particles(FPs)have been selected as the main machinability attributes and the factors leading to minimized emission have been *** to experimental observations,despite the type of coating used,the use of higher levels of flow rate led to less UFPs,while no significant effects were observed on *** similar cutting conditions,higher levels of FPs were recorded under the use of uncoated ***,cutting speed had no significant influence on UFPs;nevertheless,it significantly affects the FPs despite the type of insert used.

关键词： metal matrix composites(MMCs) particle emission dust emission turning lubrication mode