OBJECTIVES Exchanging amniotic fluid (AF) with perfluorocarbon (PFC) may serve as a medium for fetoscopic surgery. This study evaluates the distribution and physiologic effects of intraamniotic PFC as a medium for fetoscopy. METHODS Fetuses of 17 pregnant rabbits underwent either exchange of the AF with PFC, electrolyte solution (ES), or control. The quality of vision during fetoscopy was ass...

Introduction Magnetic Resonance Imaging (MRI) using H spins from water is a major in vivo imaging modality. With F MRI, cells labeled with fluorinated compounds can be visualized in the body without interference of the large H background from mobile water in tissues. Importantly, it also allows quantification of the number of cells directly from the image data [1, 2]. However, the perfluorocarb...

This paper presents the results of experimental research and mathematical modelling in terms influence periodic dynamic instabilities have on condensation phase change R1234yf R1234ze refrigerants tubular minichannels. The main reason for this was fact that under Montreal Protocol (1986), as well Regulation No 517/2014 European Parliament Council 16 April 2014, F-gases such hydrofluorocarbons (...

Humanity has come to depend on synthetic, factory made gases that have extremely significant global warming potential. Fluorinated greenhouse gases, or F-gases, such as hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulfur hexafluoride (SF6), and nitrogen trifluoride (NF3) been termed “super pollutants” gases” given their severe powerful impact the climate. They are most potent known moder...

Abstract. Perfluorocarbons (PFCs) are amongst the most potent greenhouse gases listed under United Nations Framework Convention on Climate Change (UNFCCC). With atmospheric lifetimes order of thousands to tens years, PFC emissions represent a permanent alteration global atmosphere human timescales. While industries responsible for vast majority these – aluminium smelting and semi-conductor manu...

BACKGROUND Filling the lung with dense liquid perfluorocarbons during total liquid ventilation (TLV) might compress the myocardium, a plausible explanation for the instability occasionally reported with this technique. Our objective is to assess the impacts of TLV on the cardiovascular system, particularly left ventricular diastolic function, in an ovine model of neonatal respiratory distress s...

Background and Purpose Perfluorocarbons (PFCs) are considered promising cerebral protection agents because they could combine the beneficial effects of decreased blood viscosity with enhanced oxygen-carrying capacity and oxygen tissue delivery, but trials of PFCs as hemodilutants have been very limited. We evaluated fluoromethyloadamantane (FMA), a new perfluorocarbon compound, as an isovolemic...

BACKGROUND Total liquid ventilation (TLV) with perfluorocarbons has been shown to induce rapid protective cooling in animal models of myocardial ischemia and cardiac arrest, with improved neurological and cardiovascular outcomes after resuscitation. In this study, the authors hypothesized that hypothermic TLV can also limit kidney injury after cardiac arrest. METHODS Anesthetized rabbits were...

Measurement of cerebral arterial and venous blood volumes during increased cerebral blood flow can provide important information regarding hemodynamic regulation under normal, pathological, and neuronally active conditions. In particular, the change in venous blood volume induced by neural activity is one critical component of the blood oxygenation level-dependent (BOLD) signal because BOLD con...