Drummond G B, Scott D H
Anaesthesia. 1980 Sep;35(9):854-7. doi: 10.1111/j.1365-2044.1980.tb03942.x.
Bevelled spinal needles sizes 22 and 25 gauge were passed through tough meat to assess the influence of bevel orientation on the path of the needle. The needle bent away from the bevel surface by about 1 mm for each centimetre of needle travel through the tissue. With an introducer, the deviation was reduced by a reduction of the distance of unsupported travel. Pencil-point needles were less deviated.
将22号和25号斜口脊髓穿刺针穿过坚韧的肉块，以评估斜口方向对穿刺针路径的影响。穿刺针在组织中每行进1厘米，就会向远离斜口表面的方向弯曲约1毫米。使用导引器时，由于减少了无支撑行进的距离，偏差减小。铅笔尖针的偏差较小。
