du t Zaaijman J, Slabber C F
S Afr Med J. 1979 Jun 2;55(23):915-6.
The fate of plastic catheters threaded into the epidural space was studied radiographically in a total of 125 catheters in 75 patients. The longer the segment of catheter, the less likely it is to reach the intended position, because it may curl up or become deflected. The most reliable technique for accurately placing an epidural catheter at any specific level is to enter the epidural space as close as possible to that level, so that the catheter does not need to be threaded for more than 2--3 cm.
对75例患者共125根置入硬膜外腔的塑料导管的走向进行了影像学研究。导管置入段越长，到达预期位置的可能性越小，因为它可能会卷曲或发生偏移。在任何特定节段准确放置硬膜外导管的最可靠技术是尽可能靠近该节段进入硬膜外腔，这样导管不需要置入超过2 - 3厘米。
