Zarzur E
Department of Pathology, University of São Paulo Medical School, Brazil.
Arq Neuropsiquiatr. 1996 Sep;54(3):455-60. doi: 10.1590/s0004-282x1996000300015.
This study aimed to evaluate the transverse and longitudinal distensibility of the posterior human lumbar dura mater. Results are compared with previous literature on biomechanical property studies. Possible clinical implications were also examined.
Samples of human dural sac were obtained from autopsy studies in three adult male cadavers. Dural sac samples were sectioned longitudinally to measure transverse and longitudinal distensibility, thickness and circumference.
It was recorded that the posterior lumbar dura mater was easily distensible only in the transverse direction. The longitudinal force required to distend and rupture the posterior lumbar dura mater samples is 3.5 to 6.7 times greater than the force to produce a transversal rupture.
Depending on the local cerebrospinal fluid pressure, the documented easier transverse distensibility of the posterior lumbar dura mater may allow greater contact of the lumbar dural sac with the wall of the lumbar vertebral canal. This fact may affect the diffusion of solutions introduced into epidural space.
本研究旨在评估人类腰椎硬脊膜后部的横向和纵向伸展性。将结果与先前关于生物力学特性研究的文献进行比较。还研究了可能的临床意义。
从三具成年男性尸体的尸检研究中获取人类硬脊膜囊样本。将硬脊膜囊样本纵向切开，以测量横向和纵向伸展性、厚度和周长。
记录显示，腰椎硬脊膜后部仅在横向方向易于伸展。使腰椎硬脊膜后部样本伸展和破裂所需的纵向力比产生横向破裂的力大3.5至6.7倍。
根据局部脑脊液压力，记录的腰椎硬脊膜后部更容易横向伸展这一情况可能使腰椎硬脊膜囊与腰椎椎管壁有更大接触。这一事实可能会影响引入硬膜外间隙的溶液的扩散。
