The O2 Arena, commonly known as the O2, is a multi-purpose indoor arena in the centre of The O2 entertainment district on the Greenwich Peninsula in southeast London. It opened in its present form in 2007. It has the second-highest seating capacity of any indoor venue in the United Kingdom, behind the Manchester Arena, and in 2008 was the world's busiest music arena. As of 2022, it is the ninth-largest building in the world by volume. #reels #viral #o2arena #london #londonreels #londonlife #lond

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When a monitor does not read SpO2, common factors include poor sensor placement, low perfusion, motion artifacts, or low hemoglobin levels. To troubleshoot, ensure the sensor is properly placed, check for adequate circulation, or try a different finger or toe. In case the monitor still fails, alternatives like a handheld pulse oximeter or arterial blood gas (ABG) test can help. A plethysmograph visualizes blood volume changes, useful in assessing oxygen levels. Vasospasm, constriction of blood v