Consumption of Cisatracurium in different age groups, using a closed loop computer controlled system


We devised this study to quantify the effect of age on the consumption of cisatracurium under general anaesthesia, using a computer controlled closed loop infusion system. We further investigated this effect on, sufentanil and propofol consumption.

Methods:
74 patients of physical status I and II, requiring general anaesthesia for elective abdominal surgery, were assigned to three groups.

Patients in group 1 were aged from 20 to 45, group were from 46 to 64, and group 3 above 65 years old. General Anesthesia was maintained with propofol and muscle paralysis was maintained using a closed-loop computer controlled infusion of cisatracurium.

For analgesia, intermittent bolus of sufentanil 10 mug was given.

Results:
Cisatracurium consumption in group 1, 2 and 3 were 1.8 +/- 0.3, 1.6 +/- 0.4 and 1.3 +/- 0.4 mug/kg/min respectively. There was significant difference of cisatracurium consumption between group 1 and 3 (P = 0.002), and the consumption of cisatracurium in group 3 was less as compared with group 2 (P = 0.04).

The average recovery index of patients in group 1, 2 and 3 were 8.8 +/- 2.6, 11.5 +/- 2.9 and 12.7 +/- 2.5 minutes respectively. There were difference between group 1 and 2 (P = 0.02).

As compared with group 1, the recovery index was still longer in group 3 (P = 0.001). Patients in group 1, 2 and 3 consumed an average sufentanil 0.4 +/- 0.1, 0.4 +/- 0.1 and 0.3 +/- 0.1 mug/kg/hr, respectively.

There were statistical significant between group 1 and 3(P

The difference in the propofol consumption was found statistically significant when comparing between any two groups.

Conclusion:
We concluded that the sensitivity of anesthetic agents increased with age. Less medication was required to achieve a desirable effect in older patients specially those above 65 years of age, and the drug effect was prolonged.Trial registration: ClinicalTrials.gov Identifier: NCT01785446.

Author: Shehzaad JoomyeDonglai YanHaiyun WangGuoqiang ZhouGuolin Wang
Credits/Source: BMC Anesthesiology 2014, 14:29

Published on: 2014-04-21

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