The main component of air-driven pumps are elastic diaphragms. These diaphragms are made from rubber or some other flexible material such as a thermoplastic elastomer. A method based on frequency analysis of the acoustic signal obtained from an air-driven pump during operation is described in this paper. A fully digital system for frequency analysis based on a personal computer was developed fo...

Introduction: Heart failure is a major hazard for public health. Despite recent advance in medical therapy, there is not enough information on the outcome of off-pump coronary artery bypass (OPCAB) and medical therapy on the patients with severe ventricular dysfunction and triple-vessel (CAD). This study aimed to compare treatment outcomes and mortality rate in patients undergoing off-pump coro...

This note describes a simple high-voltage dc generator which serves as an emergency power source for an ion vacuum pump during power interruptions, or failure of the main supply.

BACKGROUND Stroke is a devastating complication of coronary artery bypass grafting (CABG). This study was carried out with the aim that the development of off pump coronary artery surgery decreases the incidence/adverse outcome due to extra corporeal circulation. METHODS The data utilized in this study was extracted from a randomized controlled trial that was conducted from January 2006 to Ma...

Background Off-pump coronary artery bypass grafting (OPCABG) procedures can avoid the complications of an on-pump bypass. However, some cases unexpectedly require conversion to cardiopulmonary bypass during OPCABG. The risk factors associated with a sudden need for cardiopulmonary bypass were analyzed. Methods This retrospective study included 283 subjects scheduled for OPCABG from 2001 to 20...

BACKGROUND Off-pump coronary artery bypass surgery is considered to be less invasive compared with a conventional coronary artery bypass surgery, while objective assessment of its invasiveness has not been well established. The grade of invasiveness of off-pump CABG was evaluated by biochemical markers released from the myocardium. METHODS Perioperative serial changes of myocardial enzyme lea...