Key result
Turning patients during plain bupivacaine subarachnoid anesthesia increases analgesic levels by ~2-3 segments.
Why the study?
The effect of patient posture changes on the spread of analgesia after isobaric subarachnoid anesthesia was investigated.
Does posture change affect the spread of analgesia in patients receiving subarachnoid anaesthesia with plain bupivacaine?
Does posture change affect the spread of analgesia in patients receiving subarachnoid anaesthesia with plain bupivacaine?
Changing patient posture from lateral to supine and supine to prone significantly increases the spread of analgesia during subarachnoid anaesthesia with plain bupivacaine.
Answers are grounded in this paper and cite their sources.
May warrant caution with posture changes during plain bupivacaine spinals; leaves open need for randomized confirmation of block dynamics.
Twenty-five patients had subarachnoid anaesthesia induced with 3.0 ml 0.5% bupivacaine plain. A study of the spread of analgesia demonstrated a small (2-3 segments) but significant (p less than 0.001) rise in analgesic levels when the patients were turned from a lateral to the supine position, and from the supine to prone positions.
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I.F. Russell (1984) studied this question. Turning patients from lateral to supine and supine to prone during subarachnoid anesthesia with 0.5% plain bupivacaine caused a significant 2-3 segment rise in analgesic levels (p<0.001).
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