Most commercial flights, however, fly at 38,000 feet above the Class B maximum height and there is not a specific speed limit imposed. BA Captain Dave Thomas stated why they fly at this height: 'This sort of altitude is a good compromise between engine efficiency and aerodynamic efficiency for jet aircraft.
The most common cause of de Quervainâs tenosynovitis is chronic overuse of the wrist. Repetitive movements day after day cause irritation and pain. One common movement that causes it is lifting a child into a car seat. Another is lifting heavy grocery bags by the handles.
De Quervainâs Disease fundamentals. De Quervainâs disease is a painful inflammation of specific tendons that extend the thumb. The swollen tendons and their coverings cause friction within the narrow tunnel or sheath through which they pass. The result is pain that may extend from the forearm to the thumb base.De Quervainâs was named after the Swiss surgeon who first described the condition in 1895. It is one of the most common types of tendon lining inflammation (also called tenosynovitis).reatment usually involves wearing a splint 24 hours a day for four to six weeks to immobilize the affected area and refraining from any activities that may aggravate the condition. Ice may also be applied to reduce inflammation.