Regional Anesthesia Compared to GA..Part1

The evidence regarding regional techniques compared with general anesthesia has been reviewed with respect to several outcomes.

Ten studies of neuraxial blockade showed no decrease in postanesthesia care unit (PACU) time, or in the rate of PACU bypass, probably related to the persistent immobility associated with neuraxial anesthesia in the early recovery phase. In contrast, peripheral nerve blockade allowed for earlier discharge from phase 1 PACU, as well as a higher percentage of eligibility to bypass phase 1 at the end of surgery.

Both neuraxial blockade and peripheral nerve block were associated with significantly lower visual analog scale (VAS) scores in the PACU, as well as a significantly reduced requirement for postoperative analgesics in the PACU. Despite better pain relief, as noted previously there was no difference in the PACU time with neuraxial blockade.

With neuraxial blockade, there was a 40% reduction in nausea associated with neuraxial blockade, but this was not statistically different from the general anesthesia group. Peripheral nerve blockade did provide a significant fivefold decrease in nausea.

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The pressure volume loop...

In the pressure-volume loop below, cardiac work is best represented by: the area of the curve the slope of the line from points C to D the distance of the line from points C to D the slope of a line from points A to D .. .. ... .... ... .... .... .... In the pressure-volume loop below, cardiac work is best represented by: the area of the curve Cardiac work is the product of pressure and volume and is linearly related to myocardial oxygen consumption. Cardiac work is best represented by the area of the curve of a pressure-volume loop.

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