Results 231 to 240 of about 28,700 (271)

Homocysteine and pulsatility index in lacunar infarction

Clinical Neurology and Neurosurgery, 2011
To evaluate an association between plasma concentration of total homocysteine (tHcy) and pulsatility indexes (PIs) of cerebral arteries in patients with lacunar infarction (LI), comparing control subjects.Consecutive patients referred to a neurovascular ultrasound laboratory were evaluated from March 2007 to February 2008.
Seul-Ki, Jeong, Do-Hyung, Kim, Young I, Cho   +2 more
openaire   +2 more sources

Transcranial Doppler Pulsatility Index

Neurosurgery, 2010
Transcranial Doppler sonography (TCD) assessment of intracranial blood flow velocity has been suggested to accurately determine intracranial pressure (ICP).We attempted to validate this method in patients with communicating cerebrospinal fluid systems using predetermined pressure levels.Ten patients underwent a lumbar infusion test, applying 4 to 5 ...
Anders, Behrens, Niklas, Lenfeldt, Khalid, Ambarki, Jan, Malm, Anders, Eklund, Lars-Owe, Koskinen   +5 more
openaire   +2 more sources

Hemodynamic and arteriographic evaluation of femoral pulsatility index

Journal of Surgical Research, 1982
Femoral pulsatility index (FPI), a function derived from the Doppler arterial velocity spectrum which is independent of Doppler probe/vessel angle, has previously been reported to be inversely proportional to the angiographically determined degree of aortoiliac stenosis.
D P, Flanigan, J T, Collins, J A, Schwartz, C, O'Mara, W R, Flinn, J J, Bergan, J S, Yao   +6 more
openaire   +2 more sources

Some failings of pulsatility index and damping factor

Ultrasound in Medicine & Biology, 1986
Pulsatility index (PI) is a commonly used method of objective assessment of the Doppler waveform. PI falls with increasing proximal stenosis and is raised by increasing peripheral resistance. Damping factor (DF) for an arterial segment is calculated by dividing the proximal by the distal PI.
Baker, AR, Evans, DH, Prytherch, DR, Morton, DB, Bentley, S, Asher, MJ, Bell, PRF   +6 more
openaire   +2 more sources

Pulsatility Index, Patent Ductus Arteriosus, and Brain Damage

Pediatrics, 1982
The study of CBF velocity by external Doppler method appears to offer the clinician a noninvasive tool with which to gather information related to changes in cerebral hemodynamics. Inasmuch as the clinical condition of sick preemature infants is different from that of adults with obstructive vascular disease, and as the arteries under study are deeper ...
R, Bejar, T A, Merritt, R W, Coen, F, Mannino, L, Gluck   +4 more
openaire   +2 more sources

Arterial Pulsatility Index values for prediction of aneurysm

2015 Medical Technologies National Conference (TIPTEKNO), 2015
Blood flow is pulsatile and and the pulsatility is essential to maintain vessel wall function. Pulsatility Index is measures of vascular resistance. Phase contrast technique is used to determine blood flow quantification in cerebrovascular and cardiovascular pathologies.
Tekin, Engin, Pehlivan, Murat
openaire   +2 more sources

Umbilical artery pulsatility index: reliability at different sampling sites

Journal of Perinatal Medicine, 2006
To analyse the inter-observer and inter-artery reliability of the umbilical artery (UA) pulsatility index (PI) at different sampling sites.One hundred consecutive singleton pregnancies between 24 and 40 weeks were included. The PI was calculated by two independent operators from both umbilical arteries at the placental end, at a free-floating loop and ...
Francesc, Figueras, Susana, Fernandez, Elisenda, Eixarch, Olga, Gomez, Josep Maria, Martinez, Bienvenido, Puerto, Eduard, Gratacos   +6 more
openaire   +2 more sources

Comparison of umbilical artery pulsatility index reference ranges

Ultrasound in Obstetrics & Gynecology
ABSTRACTObjectiveTo compare the accuracy of four published reference standards for the umbilical artery pulsatility index (UA‐PI) in predicting small‐for‐gestational age (SGA), adverse neonatal outcomes and obstetric complications in pregnancies at risk for fetal growth restriction.MethodsThis was a secondary analysis of a prospective study of ...
J. R. Duncan, L. E. Markel, K. Pressman, A. R. Rodriguez, S. G. Obican, A. O. Odibo   +5 more
openaire   +2 more sources

Association between antenatal distress and uterine artery pulsatility index

Archives of Women's Mental Health, 2010
Although studies have found associations between maternal distress/anxiety and alterations in blood flow, data across different trimesters are inconsistent. We, therefore, sought to determine the association between measures of distress and uterine blood flow in all three trimesters. Healthy women with low-risk singleton pregnancies were recruited from
Bavanisha, Vythilingum, Lut, Geerts, Dylan, Fincham, Annerine, Roos, Sheila, Faure, Johanna, Jonkers, Dan J, Stein   +6 more
openaire   +2 more sources

Increased Pulsatility Index Is Associated with Intracranial Arterial Calcification

European Neurology, 2012
<b><i>Background/Aims:</i></b> An increase in the pulsatility index (PI) has been suggested to reflect distal vascular resistance. The purpose of the present study was to investigate the association between intracranial arterial calcification and intracranial PIs.
Kwang-Yeol, Park, Pil-Wook, Chung, Yong Bum, Kim, Heui-Soo, Moon, Bum-Chun, Suh, Won Tae, Yoon   +5 more
openaire   +2 more sources