BACKGROUND It is generally accepted that peritoneal dialysis (PD) affects systemic haemodynamics less than haemodialysis, but little is known about changes in haemodynamics during PD. It is unknown if increasing PD volume causes changes in cardiovascular haemodynamics possibly increasing the demand on the heart even during normal daily activities. METHODS Fifteen stable PD patients were inclu...

Photoplethysmographic (PPG) waveforms are used to acquire pulse rate (PR) measurements from pulsatile arterial blood volume. PPG waveforms are highly susceptible to motion artifacts (MA), limiting the implementation of PR measurements in mobile physiological monitoring devices. Previous studies have shown that multichannel photoplethysmograms can successfully acquire diverse signal information ...

A fiber chirped pulse amplification system at 1558 nm was demonstrated using a large-aperture volume Bragg grating stretcher and compressor made of Photo-Thermal-Refractive (PTR) glass. Such PTR glass based gratings represent a new type of pulse stretching and compressing devices which are compact, monolithic and optically efficient. Furthermore, since PTR glass technology enables volume gratin...

Pulse wave velocity (PWV) is the most popular index to assessment the arterial stiffness. Currently, several non-invasive examination methods with single channel for PWV are announced. This paper proposes a non-invasive digital volume pulse (DVP) measuring system using a dual channel simultaneous measurement method try to meet the demands for home healthcare equipment which is easy to operate. ...

Thrombosis at the site of arterial puncture is a common and serious complication of percutaneous cardiac catheterization in children. A double-blind study was therefore designed to test the efficacy of heparin administered during catheterization in reducing this complication. One hundred and sixty-one unselected children over one year of age were studied. Prior to catheterization, the pulse amp...

Thrombosis at the site of arterial puncture is a common and serious complication of percutaneous cardiac catheterization in children. A double-blind study was therefore designed to test the efficacy of heparin administered during catheterization in reducing this complication. One hundred and sixty-one unselected children over one year of age were studied. Prior to catheterization, the pulse amp...

OBJECTIVE To compare variations of plethysmographic wave amplitude (DeltaPpleth) and to determine the percent difference between inspiratory and expiratory pulse pressure (DeltaPp) cutoff values for volume responsiveness in a homogenous population of postoperative cardiac surgery patients. INTRODUCTION Intra-thoracic pressure variations interfere with stroke volume variation. Pulse pressure v...

Digital volume pulse maximum dilation was determined in 27 patients with borderline essential hypertension (BHT) and 28 age-matched normotensive controls (NT). Finger pulse volume (PV) and finger systolic pressure (SBP) were measured by pneumoplethysmography during vasodilation induced by combining direct and reflex heat dilation and reactive hyperemia. Finger SBP was higher (p less than 0.01) ...

BACKGROUND Arterial blood pressure is dependent on interactions between the heart and arteries. Resistive and pulsatile components of arterial load can be assessed by systemic vascular resistance (SVR, a microvascular property) and the ratio of stroke volume to pulse pressure (a surrogate of total arterial compliance, TAC), respectively. The relationship between arterial function and cardiovasc...

This study identifies a novel relationship between cerebrospinal fluid (CSF) stroke volume through the cerebral aqueduct and the characteristic peaks of the intracranial pulse (ICP) waveform. ICP waveform analysis has become much more advanced in recent years; however, clinical practice remains restricted to mean ICP, mainly due to the lack of physiological understanding of the ICP waveform. Th...