• M Gotou and K Yokoyama.
• Department of Anesthesiology, Daiichi Hospital, Nippon Medical School, Tokyo.
• Masui. 1993 Jun 1;42(6):922-5.

AbstractIt is known that the course of catheter placement is related to the firmness of catheter. This paper reports the results of roentgenographic analysis of the location of catheters (20G PERIFIX SOFT catheter-B. Braun Melsungen-blind tip with three side holes) inserted into the lumbar epidural space in 20 patients. Epidural catheterization was performed in patients on the lateral decubitus position. The epidural space was identified by the loss of resistance technique with a 17 gauge Tuohy needle, with median approach. Post-operatively, the injection of 0.5 ml radiopaque solution (Iopamidol) through the catheter was made. A-P X-ray film showed that 70 per cent of epidural catheters were inserted straightly cephalad. It has been reported that the optimum hardness and blind tip of the catheter are required for the good epidural placement. PERIFIX SOFT epidural catheter showed the good result for this purpose. From the recent anatomical observation by MRI, epi-dural space takes various figures depend on the location. Since posterior median part is the widest part in lumbar region, catheter placement should be done in this area. This will increase the success of straight placement of the epidural catheter.

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