Since the disaster began, engineers and technicians had been trying to activate hydraulic rams on the blowout preventer that, in normal operation, are used to cope with pressure surges in a well by sealing it temporarily.
The oil price rose again on March 16th as continuing unrest in Bahrain, amid the presence of foreign troops, sparked fears of wider conflict in the Gulf region.The yen came under severe upward pressure, surging on March 16th to its highest level since the second world war (see bottom chart), before falling back.
Therefore, pressure surges that occur in the system as a result of cavitation could be the main reason behind higher solubility of CO2 in the presence of ultrasound.
As pressure surges occur due to the events such as shutting down of a pumping station or pumping unit, unstable controls, oscillation in tank levels, the sudden closure of a valve, or any other sudden blockage of the moving fluid, calculations have been carried out to predictthe pressure surges in the aforementioned pipelines using the Joukowsky equation.
Seventeen patients (18.9%) had a history of hypertension and 39 (43.3%) had blood pressure surges during headache attacks.
We consider the arterial pressure surges associated with resistance exercise to be substantial, heavily taxing cerebral autoregulatory mechanisms [ 10].
The radial artery cannulation was done with a 22-gauge angiocatheter for continuous arterial pressure monitoring to avoid blood pressure surges during intubation.
Asymmetric pressure flow relationships may reflect an evolutionary adaptation for protecting the cerebral circulation against arterial pressure surges (Cassaglia et al. 2008).
Obstructive respiratory events are accompanied by repetitive oxygen desaturation and blood pressure surges, and are usually terminated by brief awakenings (electroencephalographic arousals).
However, when devising such programmes, any potential unfavourable effects of blood pressure surges on the brain should be taken into account.
