Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie : AINS
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Anasthesiol Intensivmed Notfallmed Schmerzther · Nov 2002
Randomized Controlled Trial Clinical Trial[Influence of positioning on the quality of unilateral spinal anesthesia].
Unilateral spinal anaesthesia ("hemi-spinal") is theoretically associated with the advantages of fewer cardiovascular effects and longer duration of action while offering high density motor block of the extremity affected. ⋯ Unilateral spinal anaesthesia ("hemi-spinal") is an attractive concept, supposed to be associated with the above mentioned advantages and the additional benefit of a partially maintained sensation of one limb. The results demonstrated in this study seriously question this theoretical concept. The most likely reason for the lack of inter-lateral differences in sensory block is the high concentration of hyperbaric local anaesthetic in the cerebrospinal fluid on the dependent side, which, on turning the patient to the supine position, will transit to the previously non-dependent side subsequently leading to a significant block.