نتایج جستجو برای: washout rate

تعداد نتایج: 965526  

2009
Lara Brewer

Background: We measured Functional Residual Capacity (FRC) of the lungs with three methods in healthy volunteers. The three techniques included a CO2 partial rebreathing technique, nitrogen washout technique, and the reference technique for ambulatory patients, body plethysmography. Materials and Methods: After granting consent to an IRB-approved protocol, each of the 20 healthy volunteers part...

Journal: :Thorax 1999
M G Morris

BACKGROUND Lung volume measurement by nitrogen washout is widely used in infants, though a lack of accuracy and changes of calibration over time have been reported. The potential sources of error were explored in order to increase the accuracy and reliability of the technique. METHODS A commercial system for nitrogen washout and a 0.5 litre calibrating syringe as a lung model were used to per...

Journal: :Canadian journal of anaesthesia = Journal canadien d'anesthesie 2006
Heike Prinzhausen Mark W Crawford James O'Rourke Guy C Petroz

PURPOSE Preparation of anesthesia machines for patients who are susceptible to malignant hyperthermia includes flushing the machine with vapour-free fresh gas to washout residual anesthetic agents. To establish guidelines for the preparation of the Dräger Primus machine, we compared the washout profiles for isoflurane and sevoflurane in the Dräger Primus and Ohmeda Excel 210 anesthesia machines...

2013
Masaki OHKUBO Ikuo ODANO Naoya TAKAHASHI Kunio SAKAI

The microsphere model and the continuous withdrawal of arterial blood have been commonly used in clinical studies when measuring regional cerebral blood flow (rCBF) by N-isopropyl-p[123I]iodoamphetamine (IMP) SPECT. The method is considered to underestimate rCBF because of the washout of the tracer from brain tissue with increasing time after injection; however, the extent of this underestimati...

Journal: :IFAC-PapersOnLine 2021

This paper is concerned with the dynamics and productivity of biomass in a continuous microalgae culture contaminated by predators. We propose general model describing cultivation system where photolimited are grazed zooplankton. state necessary sufficient conditions for existence coexistence equilibrium. If this equilibrium exists, then predators converge either to it or globally asymptoticall...

Journal: :Circulation. Heart failure 2011
Yong-Mei Cha Panithaya Chareonthaitawee Ying-Xue Dong Bradley J Kemp Jae K Oh Chinami Miyazaki David L Hayes Robert F Rea Samuel J Asirvatham Tracy L Webster Connie M Dalzell David O Hodge Regina M Herges Yan-Zhong Yong Yanhua Zhang Peng-Sheng Chen

BACKGROUND The objective of the present study was to investigate the effect of cardiac resynchronization therapy (CRT) on cardiac autonomic function. METHODS AND RESULTS This prospective study included 45 consecutive patients with heart failure who received CRT devices with defibrillator and 20 age-matched, healthy control subjects. At baseline and 3 months and 6 months after CRT, we assessed...

Journal: :Chest 1976
V T Popa P Werner

Studies concerning the ability of an inhaled beta2-agonist to produce dose-related bronchodilatation are conflicting. In five asthmatic, five bronchitic, and five normal subjects, specific airway conductance (Gaw/VL), flow-volume curves, and single-breath nitrogen washout were recorded after noncummulative inhalation of 0.65 mg, 1.30 mg, 1.95 mg, and, in some subjects, 2.60 mg of metaproterenol...

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