Pre-ignition: Pre-ignition is defined as the ignition of the mixture prior to the spark plug firing. Anytime something causes the mixture in the chamber to ignite prior to the spark plug event it is classified as pre-ignition. The two are completely different and abnormal phenomenon. DETONATION.
Arthroscopy is a way to view and repair the inside of a joint. Your surgeon uses a soft, pencil-thin tube called an arthroscope. This tube has a tiny video camera, a light and fluid-exchange paths. The arthroscope, and other small instruments, are inserted into the knee joint through small incisions.
This part of the procedure usually lasts 30 minutes to over an hour. How long it takes depends upon the findings and the treatment necessary. Arthroscopy for the knee is most commonly used for: 1  Removal or repair of torn meniscal cartilage.