Results 101 to 110 of about 4,106,222 (239)

Operator auditory scale and pulsatility index for individual Doppler recordings in the embolization model.

open access: yes, 2013
Green line: pulsatility index (PI), based on the conventional analysis of Doppler spectrum (right y-axis); red line: sonographer’s auditory perception; blue line: auditory perception supported by visual presentation of the spectrum (left y-axis); n ...
Tomas Jansson (586656)   +8 more
core   +1 more source

Cannula Pairing Determines Distal Limb Perfusion During Peripheral Veno‐Arterial Extracorporeal Membrane Oxygenation: An Experimental Mock‐Loop Study

open access: yesArtificial Organs, EarlyView.
Introducer sheaths are commonly used as distal perfusion cannulas during VA‐ECMO; efficacy is uncertain. A simplified hydraulic bench experiment evaluated cannula and connection configurations during clinically relevant blood flow using water and simulated blood media. Distal flow fraction decreased with larger arterial cannulas and was not restored by
Elliott Worku   +4 more
wiley   +1 more source

How to perform Doppler examination of the maternal ophthalmic artery

open access: yes
Ultrasound in Obstetrics &Gynecology, EarlyView.
A. Youssef, M. Paoli, K. H. Nicolaides
wiley   +1 more source

Initial V‐A ECMO Flow‐Index and Its Association With Inflammation, Organ Failure, and Outcomes

open access: yesArtificial Organs, EarlyView.
Higher initial V‐A ECMO flow‐index was associated with greater shock severity and independently associated with multi‐organ failure. Early hemolysis may partly contribute to this association, particularly in eCPR patients, whereas no significant indirect effect through IL‐6 was observed.
Kostiantyn Kozakov   +9 more
wiley   +1 more source

Informativity of pulsatility index and cerebral autoregulation in hydrocephalus

open access: yesPerspectives in Medicine, 2012
SummaryBackgroundA high correlation between transcranial Doppler pulsatility index (PI) increase and intracranial hypertension has been recently demonstrated in most neurosurgical patients. But in patients with hydrocephalus PI is sometimes controversial.
Semenyutin, Vladimir   +6 more
openaire   +1 more source

Continuous‐Flow Left Ventricular Assist Devices in Biventricular Configuration: A Systematic Review and Comparative Meta‐Analysis of HeartMate 3 and HeartWare Biventricular Assist Devices

open access: yesArtificial Organs, EarlyView.
HeartWare‐BiVAD was associated with more frequent right ventricular cannulation, whereas HM3‐BiVAD demonstrated a trend toward improved survival despite a more severe preimplant clinical profile, suggesting a potential device‐related advantage of HM3 in biventricular support.
Daler Rahimov   +10 more
wiley   +1 more source

Fetal Femoral Artery Doppler Evaluation in Late-Onset Fetal Growth Restriction: A Case-Control Study

open access: yesHitit Medical Journal
Objective: To compare the femoral artery and other ultrasonographic Doppler measurements between fetuses with late-onset fetal growth restriction and uncomplicated fetuses.
Atakan Tanacan   +6 more
doaj   +1 more source

Phase coupling between eye and brain pulsations is bidirectional and modulated by the parasympathetic system – An fMREye study

open access: yesActa Ophthalmologica, EarlyView.
Abstract Purpose Physiological pulsations driven by cardiac, respiratory, and vasomotor activity are essential for solute transport within perivascular and perineural cerebrospinal fluid (CSF) pathways that support brain and eye clearance systems. Previous studies have shown that parasympathetic blockade significantly reduces ocular pulsation power and
Ebrahimi Seyed‐Mohsen   +9 more
wiley   +1 more source

P87 CEREBROVASCULAR REACTIVITY DURING COGNITIVE ACTIVATION IN ADULTS WITH CONTROLLED HYPERTENSION

open access: yesArtery Research, 2018
Hypertension, even when pharmaceutically controlled, may accelerate arterial stiffening and impair changes in blood flow necessary to support neural activity (neurovascular coupling [NVC]).
Wesley Lefferts   +3 more
doaj   +1 more source

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