Process pumps experience widely different operating times to failure. U.S. refineries achieve pump mean-times-between-failure (MTBFs) ranging from less than three years to in excess of eight years. While the importance of pump hydraulic design seems well understood, insufficient attention has been given to important issues of bearing lubricant selection, protection of the oil against contaminan...

BACKGROUND Left ventricular assist devices (LVADs) are becoming an increasingly viable alternative therapy for heart failure, either as a bridge to heart transplantation (BTT) or destination therapy (DT). The latter has become increasingly popular in recent years, in the face of a donor organ shortage and a rise in elderly patients ineligible for heart transplants. For these patients in particu...

Introduction: Acute kidney injury (AKI) is a common postoperative complication of cardiac surgery, which is associated with an increased risk of morbidity and mortality. This study investigated the frequency of postoperative AKI in low risk adult patients undergoing off-pump coronary artery bypass grafting (CABG).Materials & Methods: All consecutive adult patients of American Society of Anesthe...

BACKGROUND Optimal management of acute right heart failure following the implantation of a left ventricular assist device requires a reliable estimation of left ventricular preload and contractility. This is possible by real-time pump blood flow measurements. CLINICAL CASE We performed implantation of a continuous flow left ventricular assist device in a 66 years old female patient with an en...

Progression to failure in hypertension is associated with ventricular dilation, excessive myocyte lengthening, and an increase in myocyte length/width ratio. The temporal development of these changes in relation to impaired pump performance is unknown. We examined isolated myocytes from 1- to 12-month-old spontaneously hypertensive heart failure (SHHF) rats who develop heart failure at approxim...

The mixing of oil and gas forms the foundation deep-sea extraction transportation. However, traditional conveying equipment has low efficiency high failure rates. In this study, a spiral axial flow liquid multiphase pump was used as base model. Eulerian model RNG turbulence were for numerical simulations to analyze internal field pump. A modification scheme proposed twist airfoil shape create t...

The third generation of left ventricular assist devices (LVADs) has been shown to improve outcome and quality of life in patients suffering from acute and chronic heart failure. However, VAD-associated complications are still a challenge in the clinical practice. Here we report the resolution of a mobile thrombus formation in the proximity of the inflow cannula of a third generation of LVADs (H...

Postcardiotomy left ventricular failure (LVF) complicating a cardiac surgical procedure is usually managed with intraaortic balloon pump (IABP) counterpulsation. We report two cases of postcardiotomy LVF unresponsive to inotropic support and IABP counterpulsation that were managed successfully with the use of the TandemHeart percutaneous ventricular assist device (pVAD) (CardiacAssist, Pittsbur...

With an increasing number of off-pump coronary artery surgery procedures in high-risk patients with coagulopathy, including renal failure, hepatic failure and anticoagulant drug-using patients, the frequency of related complications such as repeated exploration for bleeding is also increasing. The associated co-morbidity and repeated use of electrocautery in postoperative bleeding leaves patien...