Results 221 to 230 of about 810,262 (267)

An Index of Peripheral Vascular Resistance

Journal of Hypertension, 1985
An index of peripheral vascular resistance, derived from directly measured arterial pressure, has been developed and tested in an animal model. Assuming a mono-exponential character for diastole, the time constant for direct arterial pressure decay in the central aorta was obtained with high-fidelity recording techniques from six anaesthetized dogs ...
J T, Walsh, S K, Mehta, W S, Topham, A D, Goldberg   +3 more
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Relationship between the Resistive Index and Vascular Compliance and Resistance

Radiology, 1999
To evaluate the dependence of the resistive index (RI) on not only vascular resistance but also vascular compliance.An in vitro model that made use of a pulsatile pump, blood-mimicking fluid, and variable compliance and resistance was used to investigate the relationship between the RI and both vascular compliance and resistance.In the absence of ...
R O, Bude, J M, Rubin
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Role of resistive index in renal colic

Urological Research, 2007
We studied the role of duplex Doppler ultrasonography in the diagnosis of renal obstruction caused by ureteral calculi. Using duplex Doppler sonography, we evaluated the intrarenal hemodynamics of 27 patients who presented to the emergency department with renal colic.
Mehmet Ruhi, Onur, Metin, Cubuk, Cagatay, Andic, Mutlu, Kartal, Gokhan, Arslan   +4 more
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Renal resistive index in healthy children

European Journal of Radiology, 2005
The objective of the study was to investigate the relationship between age and renal resistive index (RI) and to determine the normal values and ranges of RI in intrarenal arteries in healthy children.Color duplex Doppler sonography of interlobar or arcuate arteries was performed in 115 children without clinical or laboratory pathologic changes of the ...
Ayse, Murat, Saadet, Akarsu, Huseyin, Ozdemir, Hanefi, Yildirim, Omer, Kalender   +4 more
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Renal Resistive Index: not only kidney

Clinical and Experimental Nephrology, 2016
From growing data from the literature emerges that so-called ecoDoppler "Renal" Resistive Indexes (RRI) are not only specific markers of kidney damage and indicators of renal functional prognosis but they always express more clearly a strong link with the systemic circulation.
Pierpaolo, Di Nicolò, Antonio, Granata
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Extraneous Factors Affecting Resistive Index

Investigative Radiology, 1988
Recently, numerous studies have referred to the resistive index as an accurate indicator of acute renal transplant rejection. We encountered several factors other than rejection that resulted in an elevation of the resistive index in both clinical and experimental situations. Any compressive effect on the kidney will elevate the resistive index.
M A, Pozniak, F, Kelcz, R J, Stratta, T D, Oberley   +3 more
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The Emerging Resistance Index: tracking early resistance to new antibiotics

The Lancet Infectious Diseases
The high clinical burden of antimicrobial resistance (AMR) and the dwindling antibiotic pipeline demand standardised tools to monitor resistance development to new antibiotics. The Emerging Resistance Index (ERI) is a novel quantitative tool designed to track resistance to newly developed antibiotics. The ERI incorporates various parameters: AMR pooled
Garlasco, Jacopo, Arieti, Fabiana, Morra, Matteo, Tebon, Maela, Ortiz, Diego, Pezzani, Maria Diletta, Odoj, Karin, Manco, Federica, Cassini, Alessandro, Harbarth, Stephan, Presterl, Elisabeth, Carevic, Biljana, Kahlmeter, Gunnar, Thursky, Karin, Morelli, Paola, Hagel, Stefan, Savoldi, Alessia, Tacconelli, Evelina   +17 more
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The Resistance Index Represents the Corporeal Pressure and Not the Cavernous Wall Resistance

The Journal of Urology, 1997
We compare the results of the resistance index generated by duplex scanning and the corporeal pressure generated by the intracavernous injection test followed by gravity cavernosometry.We examined 40 impotent subjects with duplex scanning and gravity cavernosometry.For the entire group a significant correlation (r = 0.77, p < 0.001) was found between ...
J M, de Meyer, P, Thibo
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Doppler sonographic renal resistance index and resistance index ratio in children and adolescents with unilateral hydronephrosis

European Radiology, 2002
The aim of this study was to evaluate Doppler renal resistance index (RI) and RI ratio (RIR) in differentiating between obstructive and nonobstructive hydronephrosis in children and adolescents. The RI and RIR were measured in 32 healthy examinees (control group) and 29 patients with unilateral hydronephrosis.
Radoš, Marko, Brkljačić, Boris, Cvitković-Roić, Andrea, Vidjak, Vinko, Dmitrović, Romana   +4 more
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Value of Intraoperative Resistive Index in Kidney Transplant

Transplantation Proceedings, 2005
The value of the resistive index (RI) obtained by echo color doppler evaluation of the transplanted kidney is still not well established. Many authors consider the RI to be nonspecific sign of rejection, acute tubular necrosis, or urinary tract obstruction, but its specificity remains low.
M. Raiteri, M. Ferraresso, E. Pozzoli, C. Beretta, A. Pasciucco, M. Carini, L. Berardinelli   +6 more
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