Abstract:

Objective　To measure the height，width and area of lumbar laminae interval space，and to create a classification of the shape in lumbar laminae interval space.    Methods   156(male: 67, female: 89) X-ray pictures with anteroposterior positions were selected randomly from the database of Changping hospital (2015.02-2017.10). The height，width and area of lumbar laminae interval space were measured, then a classification of the shape of each lumbar laminae interval space was created.    Result   （1）The differences in height of each lumbar laminae interval space was not statistically significant（P＞0.05）. The differences in width of lumbar laminae interval space between L1~2 and L2~3 were not statistically significant（P＞0.05）, and the differences in other segments were statistically significant（P＜0.05）. The differences in the area between the lumbar laminae interval space of L4~5 and L5~S1 was statistically significant（P＜0.05）, and the differences in other segments was not statistically significant（P＞0.05）；（2）The differences in the height of lumbar laminae interval space(from L1~2 to L5~S1) between male and female were not statistically significant（P＞0.05）. The differences in the width of lumbar laminae interval space （from L2~3 to L5~S1）between male and female were statistically significant (P＜0.05）. The area of L2~3, L3~4 and L4~5 lumbar laminae interval space between different sex was statistically significant( P＜0.05).    Conclusion    The width of lumbar laminae interval space is significantly increased from L3~4 to L5~S1, and the area of lumbar laminae interval space in L5~S1 is larger than that in L4~5; The width of lumbar laminae interval space between L4~5 and L5~S1 in different sex is different; The shape of lumbar laminae interval space in L1~2 and L2~3 is like a oval, the shape in the L3~4 is a fan, and the shape of L4~5 and L5~S1  is similar to a butterfly.

Key words: Lumbar laminae interval space;   , Shape;   , Width;   , Height;   , Area