RESUMEN
BACKGROUND AND AIMS: Accurate measurement of intraocular pressure (IOP) under anaesthesia is essential for diagnosis and further management of pediatric glaucoma patients. However, depth of anaesthesia and use of airway device like laryngeal mask airway (LMA) or endotracheal tube can influence IOP values measured. We planned this study to compare change of IOP with facemask or LMA. Change of IOP at varying depth of anaesthesia was also assessed. MATERIAL AND METHODS: After Institutional ethical clearance and informed parental consent, 89 children of glaucoma aged 0-12 years were included in this prospective randomized controlled trial. The children were randomized to facemask (Group M) and LMA (Group L). Sevoflurane was the sole general anaesthetic used in both the groups and IOP were recorded after induction, at BIS 40-60, after LMA insertion (Group L), at BIS 60-80 and BIS more than 80. RESULTS: The IOP values did not differ significantly between the groups at BIS 40-60 and at BIS 60-80. Moreover, pre and post LMA insertion IOP values were also comparable in Gr L (p = 0.11). However, significant increase in IOP values were observed with increasing BIS values within each group. The mean IOP in Group M at BIS 40-60 was 13.41 ± 4.04 as compared to 14.18 ± 3.64 at BIS 60-80 (p = 0.003). There was a similar pattern observed in Group L, where mean IOP at BIS 40-60 & BIS 60-80 was 14.13 ± 4.90 and 15.52 ± 4.57 respectively (p < 0.001). CONCLUSION: Either facemask or classic LMA can be safely used as per anaesthesiologist's preference without any significant effect on IOP. BIS monitoring may be used during IOP measurement in paediatric glaucoma suspects for accurate assessment of IOP.
RESUMEN
Purpose: Enucleation performed in children with retinoblastoma is associated with severe postoperative pain. The use of opioids for the pain is associated with numerous complications which demand careful monitoring. Subtenon infiltration and peribulbar block are useful in ameliorating pain perioperatively following various ophthalmic surgeries which are yet to be evaluated in enucleation. Therefore, we designed this study to compare the effects of peribulbar block and subtenon infiltration on postoperative pain with opioids in pediatric enucleation surgeries. Methods: 60 children of American Society of Anesthesiologists grade I and II, age ranging from 6 months to 6 years with retinoblastoma undergoing enucleation surgery were included in the study. Group A (n = 20): received peribulbar block (peribulbar group); Group B (n = 20): received subtenon local infiltration (subtenon group); and Group C (n = 20): no block was given. Results: The postoperative fentanyl consumption was lowest with Group B compared to Group A and Group C (P value 0.001). However, the total fentanyl consumption was comparable between groups A and B, while it was significantly higher in the control group. The mean pain score face, legs, activity, cry, consolability (FLACC) scale and mean time to discharge from post anesthesia care unit were lowest in Group B followed by Group A, while Group C had the highest. There was no statistically significant difference among the 3 groups with regards to side effects. Conclusion: Subtenon infiltration showed significantly better outcomes when compared to peribulbar block and intravenous opioids alone without any untoward adverse effects.
