[Prolonged spinal anesthesia in patients with a high surgical-anesthesiological risk].

In order to prolong the time of spinal anesthesia (SA) and to reduce the doses of local anesthetics a method of catheterization of the subarachnoid space was used in 73 patients. The SA was performed as a fractional infusion of 2% solution of lidokain. Its doses were within the range of 7-11 ml. The prolonged SA is considered to be an adequate method of anesthesia in patients with high risk of the development of neurological, cardiovascular and pulmonary complications.