Objective:Computed Tomography(CT)and Magnetic Resonance Imaging(MRI)are commonly employed in pre-operative evaluation for cochlear implant surgery.However,with a decrease in the age of implantation,even minor radiatio...Objective:Computed Tomography(CT)and Magnetic Resonance Imaging(MRI)are commonly employed in pre-operative evaluation for cochlear implant surgery.However,with a decrease in the age of implantation,even minor radiation exposure can cause detrimental effects on children over their lifetime.The current study compares different cochlear measurements from CT and MRI scans and evaluates the feasibility of using only an MRI scan for radiological evaluation before cochlear implantation.Methods:A longitudinal observational study was conducted on 94 ears/47 children,employing CT and MRI scans.The CT and MRI scan measurements include,A value,B value,Cochlear duct length(CDL),twoturn cochlear length,alpha and beta angles to look for cochlear orientation.Cochlear nerve diameter was measured using MRI.The values were compared.Results:The mean difference between measurements from CT and MRI scans for A value,B value,CDL,and two-turn cochlear length values was 0.567±0.413 mm,0.406±0.368 mm,2.365±1.675 mm,and 2.063±1.477 mm respectively without any significant difference.The alpha and beta angle measures were comparable,with no statistically significant difference.Conclusion:The study suggests that MRI scans can be the only radiological investigation needed with no radiation risk and reduces the cost of cochlear implant program in the paediatric population.There is no significant difference between the measurements obtained from CT and MRI scans.However,observed discrepancies in cochlear measurements across different populations require regionally or race-specific standardized values to ensure accurate diagnosis and precision in cochlear implant surgery.This aspect must be addressed to ensure positive outcomes for patients.展开更多
Background:Although the utility of laser fiber in microscopic stapes surgery has been documented in the past,their role can be highly emphasized in endoscopic stapes surgery,especially in difficult anatomical situatio...Background:Although the utility of laser fiber in microscopic stapes surgery has been documented in the past,their role can be highly emphasized in endoscopic stapes surgery,especially in difficult anatomical situations.Methods:This is a retrospective analysis of cases where a total of 46 patients(22 in conventional stapedotomy and 24 in CO_(2) laser‐assisted stapedotomy)were included in the study.The clinical parameters were assessed both in the preoperative and postoperative periods in the respective groups and later compared 12 weeks after stapedotomy.Results:A total of 90.90%(20/22)of the patients in the conventional stapedotomy and 95.83%(23/24)of patients in laser‐assisted stapedotomy had<20 dB of AB gap in the postoperative period(P=0.71).Canaloplasty was required in six patients in the conventional stapedotomy and none of the patients in the laser group needed the same(P=0.01).Chorda tympani nerve was manipulated in 59.09%(13/22)and 25.00%(6/24)of cases in the conventional group and in the CO_(2) laser group,respectively(P=0.01).Conclusion:Although the audiological outcomes with fiber‐enabled CO_(2) laser in endoscopic stapedotomy are comparable to conventional surgery,it is a better tool in a narrow auditory canal,requiring minimal manipulation of the chorda tympani nerve.展开更多
文摘Objective:Computed Tomography(CT)and Magnetic Resonance Imaging(MRI)are commonly employed in pre-operative evaluation for cochlear implant surgery.However,with a decrease in the age of implantation,even minor radiation exposure can cause detrimental effects on children over their lifetime.The current study compares different cochlear measurements from CT and MRI scans and evaluates the feasibility of using only an MRI scan for radiological evaluation before cochlear implantation.Methods:A longitudinal observational study was conducted on 94 ears/47 children,employing CT and MRI scans.The CT and MRI scan measurements include,A value,B value,Cochlear duct length(CDL),twoturn cochlear length,alpha and beta angles to look for cochlear orientation.Cochlear nerve diameter was measured using MRI.The values were compared.Results:The mean difference between measurements from CT and MRI scans for A value,B value,CDL,and two-turn cochlear length values was 0.567±0.413 mm,0.406±0.368 mm,2.365±1.675 mm,and 2.063±1.477 mm respectively without any significant difference.The alpha and beta angle measures were comparable,with no statistically significant difference.Conclusion:The study suggests that MRI scans can be the only radiological investigation needed with no radiation risk and reduces the cost of cochlear implant program in the paediatric population.There is no significant difference between the measurements obtained from CT and MRI scans.However,observed discrepancies in cochlear measurements across different populations require regionally or race-specific standardized values to ensure accurate diagnosis and precision in cochlear implant surgery.This aspect must be addressed to ensure positive outcomes for patients.
文摘Background:Although the utility of laser fiber in microscopic stapes surgery has been documented in the past,their role can be highly emphasized in endoscopic stapes surgery,especially in difficult anatomical situations.Methods:This is a retrospective analysis of cases where a total of 46 patients(22 in conventional stapedotomy and 24 in CO_(2) laser‐assisted stapedotomy)were included in the study.The clinical parameters were assessed both in the preoperative and postoperative periods in the respective groups and later compared 12 weeks after stapedotomy.Results:A total of 90.90%(20/22)of the patients in the conventional stapedotomy and 95.83%(23/24)of patients in laser‐assisted stapedotomy had<20 dB of AB gap in the postoperative period(P=0.71).Canaloplasty was required in six patients in the conventional stapedotomy and none of the patients in the laser group needed the same(P=0.01).Chorda tympani nerve was manipulated in 59.09%(13/22)and 25.00%(6/24)of cases in the conventional group and in the CO_(2) laser group,respectively(P=0.01).Conclusion:Although the audiological outcomes with fiber‐enabled CO_(2) laser in endoscopic stapedotomy are comparable to conventional surgery,it is a better tool in a narrow auditory canal,requiring minimal manipulation of the chorda tympani nerve.
