User:M Rafiqul Islam Suman/sandbox

= Kaplan's Cardinal Line = Kaplan's cardinal line, originally specified in 1953 by E.B. Kaplan is one of the more prominent surface markers.

Kaplan's cardinal line continued along with the abducted thumb and a line that starts on the apex of the interdigital fold within the thumb and index finger to the hook of the hamate. That most closely reproduces the location of deep structures of the hand and the farthest from and proximal to the superficial palmar arch that also parallels with the proximal palmar crease.

Clinical Importance
Clinically, Kaplan's cardinal line is a better predictable marker for the superficial palmar arch. In referring to this landmark serves as the distal-most extent for open or endoscopic surgery for the release of carpal tunnel.

The superficial palmar arterial arch was an average of 11.8 and 10.4 mm from the ulnar and radial borders of the ring finger, with measured deviations of approximately 4 mm for each measure.

The relation of topographical landmarks to the deep structures arrangement of the wrist and hand have not been precisely defined and would benefit surgeons while performing endoscopic carpal tunnel surgery.