Diverse trends witnessed in assessing laryngeal lesions while comparing transcutaneous laryngeal ultrasound & videolaryngoscopy
Keywords:Diverse trends witnessed, Direct Laryngoscopy, Laryngeal Pathologies, Sensitivity, Transcutaneous Laryngeal Ultrasound
Objective: To determine the accuracy of Transcutaneous Laryngeal Ultrasound (TLUS) and Video Laryngoscopy (VL) taking Direct Laryngoscopy (DL) as Gold Standard for assessment of laryngeal pathologies.
Methodology: This Cross Sectional Comparative clinical study recruited a sample of 24 cases of either gender, requiring laryngeal examination prospectively using convenience sampling from otolaryngology outpatients of Capital Hospital, Islamabad, Pakistan over a period of six months from 1st March, 2018 to 31st August, 2018. Patients fulfilling the selection criteria were subjected to Video Laryngoscopy under local anesthesia, Transcutaneous Laryngeal Ultrasound followed by Direct Laryngoscopy under general anesthesia and findings recorded. Data was analyzed using SPSS 23. Variables specially studied included Diagnostic values of both VDL and TLUS versus DL and presented with frequency, percentage, sensitivity, specificity, PPV and NPV and Accuracy Rate.
Results: Study sample revealed 54.2% males and 45.8% females with mean age of 46.79 + 25.34 years. Hoarseness was commonest presentation (58.3%) and Laryngeal Polypi was the more frequent pathology noted (25%). VL had a sensitivity of 87.50%, specificity of 37.50%, PPV of 73.7%, NPV of 60% and Accuracy rate of 70.83%. While TLUS revealed a sensitivity of 43.80%, specificity of 70.80%, PPV of 100%, NPV of 47.15% and Accuracy rate of 62.50%.
Conclusion: Video Laryngoscopy with a higher Accuracy and sensitivity compared to Transcutaneous Laryngeal Ultrasound, is more accurate examination for assessment of Laryngeal lesions.