• Br J Anaesth · Dec 1993

    Randomized Controlled Trial Comparative Study Clinical Trial

    Radiological examination of the intrathecal position of microcatheters in continuous spinal anaesthesia.

    • T Standl and H Beck.
    • Department of Anaesthesiology, University Hospital Eppendorf, Hamburg, Germany.
    • Br J Anaesth. 1993 Dec 1;71(6):803-6.

    AbstractThere have been few studies of the intrathecal position of spinal catheters in continuous spinal anaesthesia. This prospective study was designed to examine radiologically the intrathecal position of 28-gauge spinal catheters. We studied the entry into the subarachnoid space and the intrathecal position of 68 spinal catheters. In 50%, the catheters passed in a cranial direction, in 34% the catheters remained at the level of the puncture site and in 16% the catheters were directed caudally. The intrathecal position of the catheters did not depend on the level of the lumbar puncture (P = 0.6246), but was dependent on the position of the patient during insertion of the catheter (P = 0.0093), and on the depth of insertion (P = 0.0099). Our study suggests that patients should be in a sitting position during insertion of a subarachnoid microcatheter and that the depth of insertion should not exceed 4 cm.

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