Search results for "hemodynamic"
showing 10 items of 526 documents
Blood flow and oxygenation status of human tumors. Clinical investigations.
1999
There is a large body of evidence suggesting that blood flow and oxygenation of human tumors are important research topics which may explain, in particular, resistance to radiation and to many antineoplastic drugs, which can limit the curability of solid tumors by radiotherapy and chemotherapy.This manuscript reviews the clinical investigations which have been performed regarding blood flow and oxygenation status of human tumors in radiation oncology.The possible uses and limitations of the prognostic significance and the changes under therapy measuring blood flow and oxygenation in human tumors were discussed. In addition, several approaches were summarized, which can improve the microvasc…
Wet BNP, fluid and hemodynamic status at discharge in Acute Heart Failure
2010
We comment the noteworthy results of Pimenta et al. concerning the significance of discharge BNP levels in acute HF patients. The innovation of Pimento's study is the systematic research of the potential relationship between BNP and clinical and hemodynamic parameters. We focused the attention on the importance of wet "BNP" in managing HF and its ability to reflect congestion and multiple underlying patho-physiological disturbances. The first observation, regarding the statistical order, underlines the importance of renal insufficiency at discharge in genesis of higher BNP levels. Secondly, we note that the relationship between natriuretic peptides and the non-invasive measurement of the fl…
The direct effect of magnetic tape ® on pain and lower-extremity blood flow in subjects with low-back pain: A randomized clinical trial
2021
Low-back pain has a high impact on the world population, and solutions are in demand. The behavior of specific physiological processes has been modified using magnetic fields, whether for pain relief, bone consolidation, or improvement of vascularization. The use of tape with magnetic properties could help in these cases. A double-blind randomized clinical trial was designed to use Magnetic Tape® versus placebo Kinesio tape. Blood flow variables were evaluated using pulsed power Doppler ultrasound. Resistance index, pulsatility index, systolic velocity, and diastolic velocity were measured. The pressure pain threshold was measured using algometry in 22 subjects. The results reveal significa…
Transplantation of low dose CD34+KDR+ cells promotes vascular and muscular regeneration in ischemic limbs.
2004
Hematopoietic progenitor cell transplantation can contribute to revascularization of ischemic tissues. Yet, the optimal cell population to be transplanted has yet to be determined. We have compared the therapeutic potential of two subsets of human cord blood CD34+ progenitors, either expressing the VEGF-A receptor 2 (KDR) or not. In serum-free starvation culture, CD34+KDR+ cells reportedly showed greater resistance to apoptosis and ability to release VEGF-A, as compared with CD34+KDR- cells. When injected into the hind muscles in immunodeficient SCIDbg mice subjected to unilateral ischemia, a low number (10(3)) of CD34+KDR+ cells improved limb salvage and hemodynamic recovery better than a …
OP15.08: Intrauterine fetal brain damage in preeclamptic animal model: hemodynamic and histologic changes
2010
Quantitative Topography of the Hemodynamic-Oxidative Metabolic Interrelation by Multispot Measurement Approach in Rat Ischemia Models
2001
We applied the multispot measurement approach for both laser Doppler (LD) and a microspectrophotometric method to measure local cerebral blood flow (1CBF) and local tissue hemoglobin oxygenation (IHbO2). We demonstrated that the current technology permits in vivo observation, allowing us to establish a close topographical relation between CBF and HbO2. We measured 1CBF by LD flowmetry and tissue HbO2 by a microspectrophotometric method at multiple corresponding locations using a “scanning” technique that employs a computer-controlled micromanipulator. CBF and HbO2 data from predefined locations were correlated to the topographical situation and then arranged in a three-dimensional (3D) imag…
Remote estimation of blood pulse pressure via temporal tracking of reflected secondary speckles pattern
2011
We present a novel technique for remote noncontact blood pulse pressure measurement. It is based on tracking both temporal and amplitude changes of reflected secondary speckle produced in human skin when illuminated by a laser beam. The implemented technique extracts the difference between the systolic and the diastolic blood pressure. Experimental results are presented showing good agreement when compared with conventional measurement methods.
Visualization of alveolar recruitment in a porcine model of unilateral lung lavage using3He-MRI
2009
BACKGROUND: In the acute respiratory distress syndrome potentially recruitable lung volume is currently discussed. (3)He-magnetic resonance imaging ((3)He-MRI) offers the possibility to visualize alveolar recruitment directly. METHODS: With the approval of the state animal care committee, unilateral lung damage was induced in seven anesthetized pigs by saline lavage of the right lungs. The left lung served as an intraindividual control (healthy lung). Unilateral lung damage was confirmed by conventional proton MRI and spiral-CT scanning. The total aerated lung volume was determined both at a positive end-expiratory pressure (PEEP) of 0 and 10 mbar from three-dimensionally reconstructed (3)H…
Cardiovascular effects of the methanol and dichloromethanol extracts fromTeucrium flavum L.
1998
The effects on arterial blood pressure and heart rate of the methanol and dichloromethanol extracts from Teucrium flavumL. were analysed in urethane anaesthetized rats. Mean arterial blood pressure was significantly reduced by the i.v. administration of both extracts to normotensive rats. The methanol extract also induced a decrease in the heart rate, while the dichloromethanol extract lacked any effect on this parameter. © 1998 John Wiley & Sons, Ltd.