Lovibond's angle
Encyclopedia
Lovibond's angle is the angle
between the base of the nail plate
and the adjacent skin on the end of the finger. Normally, this angle is less than 165°. If it is 180° or more, there will be a positive Schamroth's window test. This is a sign of clubbing.
Angle
In geometry, an angle is the figure formed by two rays sharing a common endpoint, called the vertex of the angle.Angles are usually presumed to be in a Euclidean plane with the circle taken for standard with regard to direction. In fact, an angle is frequently viewed as a measure of an circular arc...
between the base of the nail plate
Nail plate
The nail plate is the hard and translucent portion of the nail, composed of keratin.- See also :* Runner's toe, repetitive injury seen in runners...
and the adjacent skin on the end of the finger. Normally, this angle is less than 165°. If it is 180° or more, there will be a positive Schamroth's window test. This is a sign of clubbing.