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Abstract
[1],[2] Knowledge of the anatomy of the cisterna magna, especially the key distance from skin to cisterna magna is necessary in safely performing cisternal puncture. [...]specific anatomical measurements in vivo have not been reported in the medical literature. Methods After obtaining IRB approval and written informed consent, this sampling survey included 449 adult patients (211 males and 238 females) who received an magnetic resonance imaging (MRI) examination of the head (Siemens NOVUS 1.5T) at Aviation General Hospital between April 2013 and September 2013. With a standard deviation (SD) of measurement results at 1.05 cm, from skin to the posterior wall of cisterna magna, the level of significance was set at 5% (two-sided analysis) with 90% power and an allowable error δ at 0.1 cm. [...]the required sample size for this study would be: N = (1.96 × 1.05/0.1) 2 = 424. Gender, age, height, weight, body mass index (BMI), neck and head circumference, antero-posterior and bi-temporal diameters of head, birthplace, and ethnicity. According to the line, the positions on the forehead were recorded, above glabella, glabella, between glabella and root of nose, below the root of nose [Figure 1]. The analysis of the correlation between the distances and the gender, age, neck circumference, BMI, antero-posterior and bi-temporal diameters of the head were performed using multivariate regression analysis. Department of Anesthesiology, Weifang Medical University, Weifang, Shandong 261000; Department of Anesthesiology, Pain Medicine and Critical Care Medicine, Aviation General Hospital of China Medical University and Beijing Institute of Translational Medicine, Chinese Academy...