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Assessment of stress response attenuation with caudal morphine using a surrogate marker during pediatric cardiac
Madan Mohan Maddali1, Fathiya Al Shamsi2, Nishant Ram Arora1
1Department of Cardiac Anesthesia, National Heart Center, Royal Hospital, Muscat, Oman.
Background:
Measurement of biomarkers representing sympathetic tone and the surgical stress response are helpful for objective comparison of anesthetic protocols.
Aims:
The primary aim was to compare changes in chromogranin A levels following pump pediatric cardiac surgery between children who received bolus caudal morphine and those who received a conventional intravenous narcotic-based anesthesia regime. The secondary objectives were to compare hemodynamic responses to skin incision and the magnitude of the rise in blood sugar values between the groups.
Settings And Design:
A prospective observational study at a tertiary cardiac center.
Measurements And Methods:
Sixty pediatric cardiac surgical patients were randomized to Group I [n= 30] to receive intravenous narcotic-based anesthesia and Group II [n = 30] to receive single-shot caudal morphine. Baseline and postoperative chromogranin A levels, the hemodynamic response to skin incision, changes in blood sugar levels, and the total intravenous narcotic dose administered were recorded for each participant.
Statistical Analysis:
Pearson's Chi-squared test was used for comparison of categorized variables, and Mann-Whitney test was used for the analysis of continuous data.
Results:
Changes in chromogranin A levels and blood sugar levels were comparable in both groups. Group II received a lower narcotic dosage (P ≤ 0.001), and the response to skin incision as reflected by systolic pressure rise was less (P = 0.006).
Conclusions:
Surgical stress response attenuation was similar to caudal morphine as compared with intravenous narcotic-based anesthesia techniques as reflected by a similar increase in chromogranin A levels.
