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Chester Michael W - - 2007
We report a case of Rumpel-Leede phenomenon, or acute dermis capillary rupture, secondary to noninvasive blood pressure monitoring in a patient with type 2 diabetes mellitus. The most likely cause was increased venous pressure during cycling of the blood pressure cuff during a hypertensive state. Anesthesiologists need to be aware ...
Seo Jeong-Hwa - - 2007
BACKGROUND: To eliminate the influence of hydrostatic pressure, proper transducer positions for central venous pressure and pulmonary artery wedge pressure are at the uppermost blood levels of right atrium (RA) and left atrium (LA). This study was performed to investigate accurate reference levels of central venous pressure and pulmonary artery ...
Arbeille P - - 2007
The objective of the present study was to quantify the effects of elastic compression stockings (ECS) on the leg hemodynamics, the venous return (flow and distensibility) and on the leg superficial tissue thickness. MATERIAL & METHODS: 10 healthy women were submitted to LBNP (Lower Body Negative Pressure) tests without then ...
Gagné N - - 2007
We have determined the gain of the cardiopulmonary baroreflex (CPBR) by measuring the central venous pressure (CVP) by venous catheter and calculating the total peripheral resistance (TPR) from mean arterial pressure (MAP) by Finometer and cardiac output (QD) by Doppler ultrasound. We tested the hypothesis that the BeatScope software of ...
Jegger D - - 2007
Peripheral access cardiopulmonary bypass (CPB) is initiated with percutaneous cannulae (CTRL) and venous drainage is often impeded due to smaller vessel and cannula size. A new cannula (Smartcanula, SC) was developed which can change shape in situ and, therefore, may improve venous drainage. Its performance was evaluated using a 2-D ...
Valenza Franco - - 2007
OBJECTIVE: To investigate the effects of intra-abdominal hypertension on esophageal and central venous pressure considering values obtained at end-expiration (i.e., in static conditions) and during tidal volume delivery (i.e., in dynamic conditions). DESIGN: Retrospective (pigs) and prospective, randomized, controlled (rats) trial. SETTING: Animal laboratory of a university hospital. SUBJECTS: Six ...
Levinger U - - 2007
Varicocele is a bilateral vascular disease which occurs when the one-way valves in the internal spermatic veins, the testicular venous drainage system, malfunction. Based on new findings and fluid-mechanics analysis we showed that this process results in vertical blood columns, which cause pathological hydrostatic pressure in the testicular venous microcirculatory ...
Sakurai Hiroyuki H Department of Plastic and Reconstructive Surgery, Tokyo Women's Medical University, Kawada-cho, Shinjuku-ku, Tokyo, Japan. - - 2007
Disruption of venous outflow can lead to tissue necrosis. Thrombosis of a venous channel at the coaptation site in instances of free tissue transfer could cause death of the transplanted tissues. Although various techniques have been used to monitor the viability of transferred tissues, there has been no technique designed ...
Kozieras Jan - - 2007
The transpulmonary thermodilution technique enables measurement of cardiac index (CI), intrathoracic blood volume (ITBV), global end-diastolic volume (GEDV), and extravascular lung water (EVLW). In this study, we analyzed the robustness of this technique during an acute increase in systemic vascular resistance (SVR). Prospective, clinical study. Surgical intensive care unit in ...
Green N D C - - 2007
A hydrostatic rise in forearm vascular transmural pressure may be associated with an increase in forearm blood flow (FBF) that causes pain. To test this hypothesis, forearm vascular transmural pressure was elevated in eight male volunteers by a series of 1-min hypobaric exposures of the left arm to incrementing differential ...
Abramowitz Harry B - - 2007
Deep venous thrombosis (DVT) and pulmonary embolization (PE) associated with air travel are directly related to the duration of flight and seating in non-aisle seats. In this study, we assessed a modification of a standard airline seat (NewSit) designed to decrease the incidence of DVT on long flights. This seat ...
McLeod David - - 2007
The landmark publications that gave such impetus to our understanding of proliferative diabetic retinopathy are reviewed in the light of more recent reports. Briefly, confluence of small areas of capillary closure in the midperipheral and peripheral retina results in arteriovenous shunting and abnormal oxygen partial pressure gradients. These gradients embrace ...
Brennan J Matthew - - 2007
Physicians' ability to accurately estimate right atrial (RA) pressure from bedside evaluation of the jugular venous waveform is poor, particularly when performed by physicians in training. Conventional ultrasound measurement of the inferior vena cava (IVC) accurately predicts RA pressure, but the cost, lack of portability, and specialized training required to ...
Vancraeynest David - - 2007
BACKGROUND: Recent experimental data have shown that the combined exposure of rodent hearts to high acoustic pressure and ultrasound contrast agents can induce vascular injury and cell damage. The aim of the present work was to test whether similar effects can be observed in humans. METHODS AND RESULTS: Twenty patients ...
Flore Roberto - - 2007
BACKGROUND: Healthy workers who stand for prolonged periods show enhanced production of reactive oxygen species (ROS) in their systemic circulation. Oxidative stress is thought to be a risk factor for chronic venous insufficiency and other systemic diseases. AIM: To evaluate the effectiveness of compression stockings in the prevention of oxidative ...
Rosaria Cesarone Maria - - 2007
The evolution of microcirculatory methods and the definition of the concept of venous microangiopathy allow the study in a quantitative way of microcirculatory changes produced by pharmacologic treatments at the areas most frequently and severely affected by chronic venous insufficiency (CVI), venous hypertensive microangiopathy, and venous ulcerations. This pilot study ...
Yoshihara Fumiki - - 2007
BACKGROUND: Although adrenomedullin is an indicator of cardiac dysfunction in haemodialysis patients, the clinical significance of midregional proadrenomedullin has not been elucidated. Objectives. We evaluated whether midregional proadrenomedullin reflects cardiac dysfunction, systemic inflammation or blood volume in haemodialysis patients. METHODS: Plasma midregional proadrenomedullin, C-reactive protein and delta body weight (indicating ...
Lipp A - - 2007
In multiple system atrophy (MSA), increased venous compliance with excessive venous pooling is assumed to be a major contributor to orthostatic hypotension (OH); however, venous compliance has never been assessed in MSA patients. We evaluated the severity and distribution of adrenergic, cardiovagal, and sudomotor failure in 11 patients with probable ...
Sandblom Erik - - 2007
Many ectotherms regularly experience considerable short-term variations in environmental temperature, which affects their body temperature. Here we investigate the cardiovascular responses to a stepwise acute temperature increase from 10 to 13 and 16 degrees C in rainbow trout (Oncorhynchus mykiss). Cardiac output increased by 20 and 31% at 13 and ...
Druckrey-Fiskaaen K T - - 2007
BACKGROUND: Laparoscopic resections of parenchymal organs are increasingly performed. However, little is known about the effects of laparoscopic fibrin sealant spray applications on intraabdominal pressure (IAP) and hemodynamics. METHODS: Cardiac and pulmonary monitoring was performed via two central venous pressure lines in the thoracic and abdominal vena cava, a pulmonary ...
Yeh Jiann-Horng - - 2007
To evaluate the occurrence of hemolysis during double-filtration plasmapheresis (DFP) treatment and its causes, we prospectively treated 113 myasthenic patients and monitored transmembrane pressure (TMP), arterial line pressure (Pa), and venous line pressure (Pv) at 30-minute intervals (M30, M60, M90, and M120) during treatment. Laboratory and clinical parameters related to ...
Shafik Ahmed - - 2007
Etiology of venogenic erectile dysfunction is not exactly known. Various pathologic processes were accused but none proved entirely satisfactory. These include presence of large venous channels draining corpora cavernosa, Peyronie's disease, diabetes and structural alterations in fibroblastic components of trabeculae and cavernous smooth muscles. We investigated hypothesis that tunica albuginea ...
Saura Daniel - - 2007
Patent foramen ovale (PFO) of the interatrial septum is a cardiac foetal remnant, which frequent persistence in adulthood has important implications in a variety of clinical conditions. Echographic diagnosis of PFO is based on detection of interatrial shunt by means of contrast microbubbles identification after venous injection of a first-generation ...
Bringard A - - 2006
AIM: We applied near-infrared spectroscopy (NIRS) to evaluate in resting conditions the effects of compression tights (CT) on calf muscle oxygenation and venous pooling compared with Lycra(R) elastic tights (ET) and shorts (no compression) according to the body posture (supine vs standing). METHODS: Twelve sportsmen regularly involved in endurance training ...
Chow Rosalind S - - 2006
OBJECTIVE: To determine whether peripheral venous pressure (PVP) was correlated with central venous pressure (CVP) when measured by use of different catheter sizes, catheterization sites, and body positions in awake dogs and cats. ANIMALS: 36 dogs and 10 cats. PROCEDURES: Dogs and cats with functional jugular and peripheral venous catheters ...
Recek C - - 2006
The hemodynamic significance of the calf perforating veins continues to be the point of controversy. The conception that incompetent perforating veins cause hemodynamic disturbance and are responsible for the formation of leg ulceration has still many adherents prefering perforator surgery, whereas others reject any causal relation between large, incompetent perforators ...
Leipoldt Carl C P - - 2006
PURPOSE: Using peripheral venous pressure (PVP) instead of central venous pressure (CVP) as a volume monitor decreases patient risks and costs, and is convenient. This study was undertaken to determine if PVP predicts CVP in pediatric patients. METHODS: With ethical approval and informed consent, 30 pediatric patients aged neonate to ...
Jonas Jost B - - 2007
PURPOSE: To estimate the central retinal vein pressure in patients with ischemic vs nonischemic central retinal vein occlusion (CRVO). DESIGN: Prospective clinical observational comparative study. METHODS: The study included 28 patients with CRVO, either of the ischemic type (n = 7) or the nonischemic type (n = 21). The control ...
Fujita Yoshihisa - - 2006
OBJECTIVE: The information derived from central venous catheters is underused. We developed an EKG-R synchronization and averaging system to obtained distinct CVP waveforms and analyzed components of these. METHODS: Twenty-five paralyzed surgical patients undergoing CVP monitoring under mechanical ventilation were studied. CVP and EKG signals were analyzed employing our system, ...
Lindenberger M - - 2007
Recent studies in humans have suggested sex differences in venous compliance of the lower limb, with lower compliance in women. Capillary fluid filtration could, however, be a confounder in the evaluation of venous compliance. The venous capacitance and capillary filtration response in the calves of 12 women (23.2 +/- 0.5 ...
Recek C - - 2006
Contradictory reports on the significance of several hemodynamic phenomena, such as femoral vein incompetence and incompetent calf perforators, impede orientation in venous hemodynamics. Venous pressure difference arising between the popliteal and the posterior tibial vein during the activity of the calf muscle venous pump was reported for the first time ...
Cirovic Srdjan - - 2006
INTRODUCTION: Limb venous compliance is a major factor in determining the extent of blood pooling during orthostatic stress. We measured the filling of the calf and of its major veins at different postures and quantified the venous contribution to the total volume shift of the calf. The results were also ...
Skals Marianne - - 2006
Synbranchus marmoratus is a facultative air-breathing fish, which uses its buccal cavity as well as its gills for air-breathing. S. marmoratus shows a very pronounced tachycardia when it surfaces to air-breathe. An elevation of heart rate decreases cardiac filling time and therefore may cause a decline in stroke volume (V(S)), ...
Mathiassen O N - - 2006
AIM: High peripheral resistance and structural alteration in resistance arteries are central phenomena in essential hypertension and have been widely examined by forearm venous occlusion plethysmography; at rest for studying vascular tone, and during reactive hyperaemia for studying vascular structure. This work concerns the influence of venous pressure on hyperaemic ...
Güleç Bülent - - 2006
BACKGROUND: The effect of pneumoperitoneum on veins of the lower limbs related to the intra-abdominal working pressures during laparoscopic cholecystectomy has not been thoroughly investigated. We tested the hypothesis that working pressures do not affect the venous haemodynamics in the lower limbs. METHODS: The cross-sectional area and peak flow rates ...
Osthaus Wilhelm A - - 2006
BACKGROUND: Accurate assessment and monitoring of the cardiocirculatory function is essential during major pediatric and pediatric cardiac surgery. Invasive monitoring of cardiac output and oxygen delivery (DO(2)) is expensive and sometimes associated with adverse events. Measurement of central venous oxygen saturation (ScvO(2)) is less invasive and may reflect the DO(2). ...
Yao Yong-Jie - - 2006
Increased venous compliance in lower limbs may be contributed to postflight orthostatic intolerance; however, direct animal studies to address the changes of venous compliance to microgravity have been rare. The purpose of this study was to determine compliance changes in femoral veins of rabbits after 21 days of head-down rest. ...
Massaer B B Cardiac Anaesthesia and Postoperative Cardiac Surgical ICU, Ghent University Hospital, B9000 Gent, - - 2006
Invasive haemodynamic monitoring plays a pivotal role in critically ill patients. In this respect, central venous pressure is one of the most often used parameters. This review aims to provide an overview of the use of central venous pressure monitoring, the advantages and shortcomings, besides pitfalls. The integration of central ...
Mollison Heather L - - 2006
PURPOSE: To determine the effect of reactive hyperemia on human forearm vein area. METHODS: After obtaining ethics approval and informed consent, an automatic tourniquet was applied to the forearms of 20 healthy subjects for one, two, and three minutes, at pressures of 25 mmHg, 200 mmHg, then 25 mmHg. A ...
Magder Sheldon - - 2006
OBJECTIVE: To review the clinical use of central venous pressure measurements. DATA SOURCES: The Medline database, biographies of selected articles, and the author's personal database. DATA SYNTHESIS: Four basic principles must be considered. Pressure measurements with fluid-filled systems are made relative to an arbitrary reference point. The pressure that is ...
Foster J M - - 2007
Arterial and venous pressures were measured in hagfishes subjected to acute changes in salinity. The osmotic pressure of the seawater (SW) was increased or decreased by approximately 10%. Sixty minutes after the change in medium osmolarity the osmotic pressure of the blood corresponded with that of the medium. Following transfer ...
Sandblom Erik - - 2006
Subambient central venous pressure (Pven) and modulation of venous return through cardiac suction (vis a fronte) characterizes the venous circulation in sharks. Venous capacitance was estimated in the dogfish Squalus acanthias by measuring the mean circulatory filling pressure (MCFP) during transient occlusion of cardiac outflow. We tested the hypothesis that ...
Ward Kevin R - - 2006
Knowledge of central venous pressure (CVP) is considered valuable in the assessment and treatment of various states of critical illness and injury. OBJECTIVES: We tested a noninvasive means of determining CVP (NICVP), by monitoring forearm volume changes in response to externally applied circumferential pressure to the upper arm veins. METHODS: ...
Thapa P B - - 2006
A 22 years male admitted with severe pancreatitis with central venous catheter implanted for central venous pressure monitoring and for providing total parental nutrition developed catheter fragment embolus due to accidental fracture of the same while manipulating it. Non surgical retrieval of the same was done by radiological intervention without ...
Ansari Mohammed T - - 2006
This is the first study to examine the hypothesis that prolonged sitting is associated with procoagulant changes in the local lower-limb venous system. A comparison was made with upper-limb venous changes. Changes in markers of thrombin generation, fibrinolysis, endothelial perturbation and haemoconcentration were analysed as 10 healthy adult male participants ...
Duara Rajnish - - 2006
OBJECTIVES: Neurological complications after cavopulmonary connections like bidirectional Glenn shunt and Fontan connection are occasionally encountered in the postoperative period. We discuss such a case of bilateral bidirectional Glenn shunt which developed convulsive syncope postoperatively. CASE: A 5-year-old cyanotic girl diagnosed as tricuspid atresia with pulmonary stenosis without any spell ...
Magder Sheldon - - 2006
PURPOSE OF REVIEW: The proper use of central venous pressure requires a good understanding of basic measurement techniques and features of the waveform. RECENT FINDINGS: If attention is not paid to proper leveling of the transducer and consideration of transmural pressure then major errors are made in the use of ...
Hoftman Nir - - 2006
STUDY OBJECTIVE: To assess the reliability of peripheral venous pressure (PVP) as a predictor of central venous pressure (CVP) in the setting of rapidly fluctuating hemodynamics during orthotopic liver transplant surgery. DESIGN: Prospective clinical trial. SETTING: UCLA Medical Center, main operating room-liver transplant surgery. PATIENTS: Nine adult patients with liver ...
Marx Gernot - - 2006
PURPOSE OF REVIEW: Mixed venous and central venous oxygen saturations reflect the balance between oxygen requirement and oxygen delivery, and thus may be used to assess the adequacy of tissue oxygenation. This review discusses recent data on the impact of using venous oximetry by obtaining mixed venous oxygen saturation or ...
Saner F H - - 2006
BACKGROUND AND OBJECTIVES: Positive end-expiratory pressure may alter cardiac function and systemic haemodynamics. As transplanted livers may be sensitive to liver congestion, the aim of our study was to evaluate the effect of positive end-expiratory pressure on the cardiovascular system and in particular on central venous and iliac venous pressure ...
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