We demonstrated recently that the implementation of a nurse-driven analgesia and sedation protocol (pediatric analgesia and sedation protocol [pASP]) for mechanically ventilated nonpostsurgical patients reduces the total dose of benzodiazepines and the withdrawal symptoms significantly. It has not been investigated if these results can also be expected in the group of patients undergoing surgery. To evaluate the effects of the pASP in mechanically ventilated postsurgical children regarding drug dosage, duration of mechanical ventilation, length of stay, and rate of withdrawal symptoms. This is a two-phase prospective observational control study. The preimplementation group was managed by the physician's order and the postimplementation group was managed with the pASP including COMFORT-B, nurse interpretation of sedation, and Sophia observation withdrawal symptoms scale scoring. One hundred and sixteen patients were included before and one hundred and ten patients after implementation. The pASP had no effect on length of pediatric intensive care unit stay or duration of mechanical ventilation. The protocol reduced total (5.0 mg/kg [0.5-58.0] vs 4.0 mg/kg [0.0-47.0]; = 0.021) and daily doses (4.4 mg/kg/d [1.1-33.9] vs 2.9 mg/kg/d [0.0-9.9]; < 0.001) of benzodiazepines significantly. No difference was observed in total and daily doses of opioids (5.0 mg/kg [0.1-67.0] vs 3.0 mg/kg [0.1-71.0]; = 0.81) and (0.7 mg/kg/d [0.0-7.0] vs. 0.8 mg/kg/d [0.0-3.7]; = 0.35), respectively. Rate of withdrawal symptoms was significantly lower after implementation (35.3 vs 20.0%; = 0.01), but not in patients after solid organ transplantation or oncological patients. The nurse-driven analgesia and sedation protocol is an effective procedure to reduce the total doses of benzodiazepines and occurrence of withdrawal symptoms in postsurgical children, which are naïve to opioids or benzodiazepines.
We suggest that thoracoscopic surgery in neonates and infants, although generally safe, may be associated with a decrease in regional cerebral oxygen saturation correlating with the applied intrathoracic pressure. According to our data an inflation pressure >4 mm Hg should be avoided during thoracoscopic surgery.
Background
Intraoperative blood pressure is a relevant variable for postoperative outcome in infants undergoing surgical procedures. It is therefore important to know whether the type of anesthesia has an impact on intraoperative blood pressure management in very low birth weight infants. Here, we retrospectively analyzed intraoperative blood pressure in very low birthweight infants receiving either awake caudal anesthesia without sedation, or caudal block in combination with general anesthesia, both for open inguinal hernia repair.
Methods
Ethical approval was provided by the University of Tuebingen Ethical Committee on 05/29/2018 with the project number 403/2018BO2. Patient records of infants admitted by the neonatologist (median age at birth 31.1 ± 3.5 weeks, median weight at birth 1240 ± 521 g) which were scheduled for inguinal hernia repair were retrospectively evaluated for the course of mean arterial blood pressure and perioperative interventions to stabilize blood pressure. A total of 42 patients were included, 16 patients (11 boys, 5 girls) received awake caudal anesthesia, 26 patients (22 boys, 4 girls) a combination of general anesthesia and caudal block.
Results
Approximately 3% of the measured mean arterial blood pressure values in the caudal anesthesia group were below a critical margin of 35 mmHg, in contrast to 47% in the combined anesthesia group (
p
< 0.001). Patients in the latter group showed a significantly larger drop of mean arterial blood pressure below 35 mmHg (4.7 ± 2.7 mmHg vs. 1.9 ± 1.6 mmHg;
p
< 0.005) and a significantly longer time of mean arterial blood pressure below 35 mmHg (25.6 ± 26.0 min vs. 0.9 ± 2.3 min;
p
< 0.001), although they received more volume and vasopressor boluses for stabilization (27 ± 14.8 ml vs. 10 ± 4.1 ml;
p
< 0.01 and 0.15 ± 0.06 ml vs. 0 ml of cafedrine/theoadrenaline;
p
< 0.001).
Conclusions
The study indicates that the use of caudal block as stand alone procedure for inguinal hernia repair in very low birthweight infants might be advantageous in preventing critical blood pressure drops compared to a combination of caudal block with general anesthesia.
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