Effect of clamping pressure on electrical resistance between Gas diffusion layer (GDL) and bipolar plate is a very important parameter in Proton exchange membrane (PEM) fuel cells. For investigation of this matter some researches have been done in these years. But there is not an experimental investigation of clamping pressure effect on PEM electrical resistance. In this paper, some experimenta...

BACKGROUND AND OBJECTIVES Infrarenal aortic cross-clamping is associated to cardiovascular effects. This study aimed at analyzing the effects of halothane, isoflurane and sevoflurane on cardiovascular function of dogs following infrarenal aortic cross-clamping. METHODS Thirty mongrel dogs were randomly divided in three groups, according to equipotent (0.75 MAC) inhaled anesthetic doses: GH (n...

The purpose of this study was to investigate the effect of aortic clamping on arterial waves during peripheral vascular surgery. We measured pressure and velocity simultaneously in the ascending aorta, in ten patients (70+/-5 years) with aortic-iliac disease intra-operatively. Pressure was measured using a catheter tip manometer, and velocity was measured using Doppler ultrasound. Data were col...

This article reviews the historical evolution of hepatic vascular clamping and their indications. The anatomic basis for partial and complete vascular clamping will be discussed, as will the rationales of continuous and intermittent vascular clamping.Specific techniques discussed and described include inflow clamping (Pringle maneuver, extra-hepatic selective clamping and intraglissonian clampi...

BACKGROUND As measurement of arterial oxygen saturation (SpO2) is common in the delivery room, target SpO2 ranges allow clinicians to titrate oxygen therapy for preterm infants in order to achieve saturation levels similar to those seen in normal term infants in the first minutes of life. However, the influence of the onset of ventilation and the timing of cord clamping on systemic and cerebral...

OBJECTIVE To evaluate the short term clinical effects of delayed cord clamping in preterm neonates. DESIGN Randomized controlled trial. SETTING A tertiary care neonatal unit from October 2013 to September 2014. PARTICIPANTS 78 mothers with preterm labor between 27 to 316/7 weeks gestation. INTERVENTION Early cord clamping (10 s), delayed cord clamping (60 s) or delayed cord clamping (60...

Background: The appropriate moment for clamping the umbilical cord is controversial. Immediate cord clamping (ICC) is an item of active management of the third stage of labor (AMTSL). Unclamped umbilical cord may cause inconvenience in preterm neonates because they commonly need some levels of emergent services. Some studies revealed delayed cord clamping (DCC) of preterm neonates results in be...

s of South West Vascular Surgeons Meeting held at St. Mary's Hospital, Portsmouth, 14 February 1992 PSEUDOXANTHOMA ELASTICUM CAUSING CLAUDICATION. W. G. Prout. Queen Alexandra Hospital, Portsmouth. Pseudoxanthoma elasticum is a heritable disorder of elastic fibre leading to characteristic skin changes, angioid occular streaking and cardio-vascular problems. A 34 year old man presenting with int...

Hemodynamic measurements were performed and ECG recorded before and shortly after infrarenal aortic cross-clamping during operation for abdominal aortic aneurysm in five patients without evidence of heart disease (group I) and in ten patients with severe coronary artery disease (group II). All patients sustained an increase in systemic arterial pressure. Group I demonstrated a decrease in pulmo...