Discrepancy between inferior vena cava and right atrial oxygen saturations as a sign of ischemia in the mesenteric circulation.

We describe the case of a 72-year-old patient admitted to intensive care following abdominal surgery. Venous oxygen saturations from the right atrium and superior vena cava (SVC) showed large variation due to ongoing ischemia in the mesentric circulation. If trends in venous oxygen saturation are to be followed, serial samples must be taken from the same central venous catheter (CVC) port.

Plastic ice in confined geometry: the evidence from neutron diffraction and NMR relaxation.

Neutron diffraction and nuclear magnetic resonance (NMR) relaxation studies have been made of water/ice in mesoporous SBA-15 silica with ordered structures of cylindrical mesopores with a pore diameter ∼8.6 nm, over the temperature range 180-300 K. Both measurements show similar depressed freezing and melting points due to the Gibb-Thomson effect.

Young patients with diverticular disease: a preliminary quality of life study.

Background: Diverticular disease is more apparent in the younger population under 50 years however, its management remains controversial. We report a preliminary quality of life (QoL) assessment which may be useful when determining the optimal management strategy.

Methods: A retrospective review of clinical records was carried out from April 1999 to 2004, to identify all patients diagnosed with diverticular disease and its complications, confirmed either by radiology and/or histology evidence.

Clathrate formation and dissociation in vapor/water/ice/hydrate systems in SBA-15, sol-gel and CPG porous media, as probed by NMR relaxation, novel protocol NMR cryoporometry, neutron scattering and ab initio quantum-mechanical molecular dynamics simulation.

The Gibbs-Thomson effect modifies the pressure and temperature at which clathrates occur, hence altering the depth at which they occur in the seabed. Nuclear magnetic resonance (NMR) measurements as a function of temperature are being conducted for water/ice/hydrate systems in a range of pore geometries, including templated SBA-15 silicas, controlled pore glasses and sol-gel silicas. Rotator-phase plastic ice is shown to be present in confined geometry, and bulk tetrahydrofuran hydrate is also shown to probably have a rotator phase.