نتایج جستجو برای: mechanical shock

تعداد نتایج: 337017  

2016
Naresh Thadhani Jennifer Breidenich Alex Bryant Rene Diaz

Number of Papers published in peer-reviewed journals: Number of Papers published in non peer-reviewed journals: Final Report: Thermal Analysis for Monitoring Effects of Shock-Induced Physical, Mechanical, and Chemical Changes in Materials Report Title A NETZSCH DSC 404F3 Pegasus® thermal analysis equipment has been acquired for monitoring effects of physical, mechanical and chemical changes, in...

2017
Xuesong Jiang Zhitao Zhu Ming Ye Yan Yan Junbo Zheng Qingqing Dai Lianghe Wen Huaiquan Wang Shaofei Lou Hongmei Ma Pingwei Ma Yunlong Li Tuoyun Yang Shu Zuo Ye Tian

Intra-aortic balloon pumps (IABP) have saved many patients with cardiogenic shock during the perioperative period of cardiac surgery. However, the ideal insertion timing is controversial. In the present study, we aimed to optimize the insertion timing, in order to increase the survival rate of the patients. A total of 197 patients with cardiogenic shock during the perioperative period of cardia...

2014

Shock is a physiological state characterized by an inadequate issue perfusion and cellular oxygenation associated with persisent hypotension, resulting in adverse effects on multiple organ ystems. Possible causes of shock following cardiac surgery include ump failure, pulmonary embolism, hypovolemia, sepsis, and tamonade. As the prolongation of shock status can lead to irreversible rgan damage ...

2013
Carrie Morgan Derek S. Wheeler

Obstructive shock is a less common, but important cause of shock in critically ill infants and children. It is caused by mechanical obstruction of blood flow to and/or from the heart and causes can include a tension pneumothorax, cardiac tamponade, pulmonary embolus, or cardiac defects resulting in left-sided outflow tract obstruction. Each of these can result in similar physiology with poor pe...

Journal: :Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions 2015
Ryan Kipp Amish N Raval

Acute right ventricular failure can lead to severe cardiogenic shock and death. Recovery may be achieved with early supportive measures. In many patients, intravenous fluid and inotropic resuscitation is inadequate to improve cardiac output. In these cases, percutaneous mechanical assist may provide a non-surgical bridge to recovery. Herein, we describe a case series of patients with severe, re...

Journal: :Revista espanola de cardiologia 2002
Antonio García Quintana José R Ortega Trujillo Alfredo Padrón Mújica Ricardo Huerta Blanco Leonor González Morales Alfonso Medina Fernández-Aceytuno

We report the clinical case of a 77-years-old woman with cardiogenic shock caused by dynamic left ventricular outflow tract (LVOT) obstruction that appeared after anterior acute myocardial infarction. Dynamic LVOT obstruction has been reported in various circumstances aside from hypertrophic obstructive cardiomyopathy, such as acute myocardial infarction. In a patient with cardiogenic shock and...

Journal: :Henry Ford Hospital medical journal 1991
A R Moosvi M Gheorghiade S Goldstein F Khaja

Cardiogenic shock complicating acute myocardial infarction (MI) carries a high mortality which in some series prior to 1980 exceeded 80%. Neither the use of inotropic and vasopressor agents nor intraaortic balloon counterpulsation was found to improve survival in this group of patients. Intravenous thrombolytic agents improve survival in patients with acute MI, but their role in cardiogenic sho...

Journal: :Microelectronics Reliability 2014
Jue Li Mikael Broas Jani Raami Toni T. Mattila Mervi Paulasto-Kröckel

In this work the reliability of a Micro-Electro-Mechanical Systems (MEMS) microphone is studied through two accelerated life tests, mixed flowing gas (MFG) testing and shock impact testing. The objective is to identify the associated failure mechanisms and improve the reliability of MEMS devices. Failure analyses are carried out by using various tools, such as optical microscopy, scanning elect...

Journal: :Ultrasound in medicine & biology 2007
Jonathan B Freund Tim Colonius Andrew P Evan

Evidence suggests that inertial cavitation plays an important role in the renal injury incurred during shock-wave lithotripsy. However, it is unclear how tissue damage is initiated, and significant injury typically occurs only after a sufficient dose of shock waves. Although it has been suggested that shock-induced shearing might initiate injury, estimates indicate that individual shocks do not...

Journal: :Journal of micromechanics and microengineering : structures, devices, and systems 2006
Mohammad I Younis Ronald Miles Daniel Jordy

There is strong experimental evidence for the existence of strange modes of failure of microelectromechanical systems (MEMS) devices under mechanical shock and impact. Such failures have not been explained with conventional models of MEMS. These failures are characterized by overlaps between moving microstructures and stationary electrodes, which cause electrical shorts. This work presents mode...

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