In children, I-Gel is the most common Supraglottic Airway Device (SGAD) used to provide lung ventilation during general anaesthesia for minor superficial surgeries. 

Clinically, the position of I-Gel is assessed by symmetrical bilateral chest expansion, auscultation of the chest, absence of audible oropharyngeal leakage, square wave capnogram and the seal pressure the pressure beyond which leak starts occurring at a constant flow However, these methods do not provide information regarding the site of the leakage and hence appropriate correctional manoeuvres may not be possible.

Although fibreoptic laryngoscopy (FOL) is considered the gold standard validation tool for the direct visualization of the glottis, it gives idea about only anatomical position and does not provide functional assessment.

Ultrasound imaging is a non-invasive, fast, easy, replicable, and portable technology which can provide not only anatomical but also functional assessment of the airway.

Our study aims to assess the utility of USG to detect the optimal position of the I-Gel, the cause of malpositioning and comparison of its performance with the FOL examination, seal pressure values and clinical parameters in non paralysed patients.

After the I-Gel placement, its position will be confirmed by seal pressure values, USG examination of the neck and fibreoptic laryngoscopy.

If there is malposition of the I-Gel, appropriate correcting manoeuvres will be performed and the seal pressure assessment, USG examination of the neck and fibreoptic laryngoscopy will be repeated.

The objectives of the study are as follow:

1. To assess utility of ultrasonography in comparison to clinical parameters in confirming optimal position of I-Gel in children.

2. To assess utility of ultrasonography in comparison to Fibreoptic laryngeal view (FOL) in confirming optimal position of I-Gel in children.

3. To assess utility of ultrasonography in comparison to seal pressure in confirming optimal position of I-Gel in children.

4. To assess utility of ultrasonography in finding out the cause of suboptimal position and repositioning of I-Gel in children.