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Journal Article
Randomized Controlled Trial
Somatic paravertebral block decreases opioid requirements in children undergoing appendectomy.
Canadian Journal of Anaesthesia 2010 March
PURPOSE: Somatic paravertebral block (SPVB) appears to provide effective and prolonged nerve block in children; however, study of its use in this population is limited. We compared SPVB with no block in children undergoing appendectomy.
METHODS: Thirty-six children aged 3-16 yr undergoing open appendectomy were involved in this prospective randomized controlled study. Anesthesia was induced with propofol and maintained with isoflurane in N(2)O/oxygen. All subjects received fentanyl, acetaminophen and ketorolac during anesthesia. Group I (SPVB) subjects received a right SPVB at T(11), T(12), and L(1) using 0.2% ropivacaine 0.25 mL.kg(-1) with epinephrine 1:200,000 preoperatively. Group II (Control) had only bandaids applied to skin. Both groups were given morphine 0.05 mg.kg(-1) iv every 2 hr if pain scores reached 5/10 on a visual analogue scale. Acetaminophen was administered postoperatively every 6 hr to both groups. Time to first dose of morphine, total dose of morphine in 24 hr, and any adverse effects up to 24 hr after surgery were recorded.
RESULTS: Group I (SPVB) subjects required significantly less morphine than Group II (Control) patients (0.12 +/- 0.07 vs 0.34 +/- 0.15 mg.kg(-1), respectively; P < 0.001), and time to their first dose was significantly longer (7.1 +/- 4.4 vs 2.5 +/- 1.6 hr, respectively; P < 0.001). Incidence of vomiting was 11% with Group I and 27% with Group II (P = 0.21). No other adverse effects were observed in either group.
CONCLUSIONS: In children undergoing appendectomy, SPVB provides better pain relief than no block and reduces opioid requirements. Side effects were not statistically different between groups.
METHODS: Thirty-six children aged 3-16 yr undergoing open appendectomy were involved in this prospective randomized controlled study. Anesthesia was induced with propofol and maintained with isoflurane in N(2)O/oxygen. All subjects received fentanyl, acetaminophen and ketorolac during anesthesia. Group I (SPVB) subjects received a right SPVB at T(11), T(12), and L(1) using 0.2% ropivacaine 0.25 mL.kg(-1) with epinephrine 1:200,000 preoperatively. Group II (Control) had only bandaids applied to skin. Both groups were given morphine 0.05 mg.kg(-1) iv every 2 hr if pain scores reached 5/10 on a visual analogue scale. Acetaminophen was administered postoperatively every 6 hr to both groups. Time to first dose of morphine, total dose of morphine in 24 hr, and any adverse effects up to 24 hr after surgery were recorded.
RESULTS: Group I (SPVB) subjects required significantly less morphine than Group II (Control) patients (0.12 +/- 0.07 vs 0.34 +/- 0.15 mg.kg(-1), respectively; P < 0.001), and time to their first dose was significantly longer (7.1 +/- 4.4 vs 2.5 +/- 1.6 hr, respectively; P < 0.001). Incidence of vomiting was 11% with Group I and 27% with Group II (P = 0.21). No other adverse effects were observed in either group.
CONCLUSIONS: In children undergoing appendectomy, SPVB provides better pain relief than no block and reduces opioid requirements. Side effects were not statistically different between groups.
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