Results 211 to 220 of about 162,263 (262)

A model of the hepatic perfusion index in the rat

Nuclear Medicine Communications, 1987
The hepatic perfusion index (HPI) is an indicator of the relative hepatic arterial to total liver blood flow as measured by dynamic flow scintigraphy. Hitherto, accurate assessment of the HPI in small animals has not been possible because of methodological difficulties.
D M, Nott, J S, Grime, J, Yates, M P, O'Driscoll, J N, Baxter, T G, Cooke, S A, Jenkins   +6 more
openaire   +2 more sources

The perfusable tissue index: a marker of myocardial viability

Journal of Nuclear Cardiology, 2003
PTI is a promising technique for detecting viable myocardium. The need for a PET scanner, an onsite cyclotron, and expertise regarding the production and administration of O-15-labeled water and carbon monoxide results in a tool that is only available in a limited number of centers worldwide.
Knaapen, Paul, Boellaard, Ronald, Götte, Marco J.W., van der Weerdt, Arno P., Visser, Cees A., Lammertsma, Adriaan A., Visser, Frans C.   +6 more
openaire   +3 more sources

Hepato-mesenteric index: A new Doppler index in the hepatic perfusion’s study. Comparison with Doppler perfusion index

2009
Purpose Methods and Materials Results ...
FOTI, Pietro Valerio, Farina R, Coronella MV, La Scola S, Minardi R, Riva G, Pennisi F, Ettorre GC   +7 more
openaire   +3 more sources

The influence of downstream arterial perfusion parameters on Doppler pulsatility index and resistance index in an in-vitro perfusion model

Vasa, 2006
Background: To investigate in vitro how downstream perfusion parameters influence pulsatility index (PI), resistance index (RI) and their constituting Doppler velocities. Materials and methods: We analyzed the influence of resistance, compliance, reflection coefficient and input impedance on PI and RI in an in-vitro model of arterial flow.
B, Schmidt, D, Ockert, A, Deussen, S, Schellong   +3 more
openaire   +2 more sources

Perfusion Index and ultrasonography in the evaluation of infraclavicular block

Minerva Anestesiologica, 2019
It has been reported that noninvasive, objective tests are needed for determining the success of peripheral nerve blocks because conventional methods necessitate the cooperation of the patient. It is also known that the brachial plexus block causes vasodilatation and an increase in blood flow due to its sympathectomy effect.
Rahşan Dilek Okyay, Mehmet Malik Bereket, Gamze Küçükosman, Hilal Ayoğlu, Ferruh Niyazi Ayoğlu, Özcan Pişkin, Bengü Gülhan Aydın   +6 more
openaire   +3 more sources

The Rewarming Index Formula for Pediatric Cardiopulmonary Perfusion

Artificial Organs, 2009
AbstractCareful rewarming of perfusion blood following cardiopulmonary bypass surgery is critical to a successful outcome, but the optimal rewarming strategy is not clear. The purpose of this study was to derive a formula for a rewarming index (defined as [rewarming time × perfusion flow]/[body weight × body surface area]) that would enable the ...
Hideshi, Itoh, Shingo, Kasahara, Yasuhiro, Fujii, Ysuhiro, Kotani, Sadahiko, Arai, Shunji, Sano   +5 more
openaire   +2 more sources

Arteriovenous pH difference—A new index of perfusion

Journal of Pediatric Surgery, 1988
Measurement of the pH of arterial blood may not reflect early stages of anaerobic metabolism. Since a relationship exists between pH and cellular utilization of oxygen, this study sought to determine whether the difference between arterial and venous pH might serve as a more useful index for estimating the adequacy of tissue perfusion.
K S, Bergman, B H, Harris
openaire   +2 more sources

Perfusion index as a possible predictor for postanesthetic shivering

Journal of Anesthesia, 2013
Postanesthetic shivering can be triggered by surgical stress and several aspects of anesthetic management and is frequently preceded by a decrease in peripheral blood flow due to thermoregulatory vasoconstriction. As perfusion index correlates with peripheral blood flow, we examined whether perioperative perfusion index, measured using pulse oximetry ...
Chiharu, Kuroki, Kohei, Godai, Maiko, Hasegawa-Moriyama, Tamotsu, Kuniyoshi, Akira, Matsunaga, Yuichi, Kanmura, Tomoyuki, Kuwaki   +6 more
openaire   +2 more sources

Cerebral Perfusion Index

Journal of Neuroimaging, 1993
Single‐photon emission computed tomography (SPECT) and transcranial Doppler (TCD) ultrasound are of good prognostic value in acute stroke, and combined they may be an accurate way to determine a target group of patients with maximum therapeutic response.
A V, Alexandrov, L E, Ehrlich, C F, Bladin, J W, Norris   +3 more
openaire   +2 more sources

Hepatic perfusion index and the evolution of liver metastases

Nuclear Medicine Communications, 1987
A total of 150 patients with primary carcinoma of the gastrointestinal tract had first-pass technetium colloid scintigraphy to estimate the hepatic perfusion index (HPI). Postoperative follow-up over 2-4 years shows that the HPI remains a sensitive method of detecting hepatic metastases, even in patients whose liver appeared normal at laparotomy.
D A, Cooke, A, Parkin, P, Wiggins, P J, Robinson, G R, Giles   +4 more
openaire   +2 more sources