Gissane angle is used to evaluate the severity of a fracture involving the calcaneus. It is often used together with Bohler's angle.
Examination: lateral foot radiographs
Measurements:
(1) Draw a line along the superior surface of the anterior process.
(2) Draw a line along the posterior facet of the calcaneus.
(3) The meeting point of the 2 lines is at the calcaneal sulcus, with the angle measured.
Interpretation:
• The normal angle is 120 to 145 degrees.
• Normally the angle for the left foot is the same as the angle for the right foot.
• An abnormal angle can be seen with a calcaneal fracture.
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Specialty: Surgery, orthopedic, Emergency Medicine
