SUPRAGLOTTIC DEVICE FOR AIRWAY MANAGEMENT

摘要

A supraglottic device for airway management comprising: a. Two tubes (A, B) one inside the other b. Two external cuffs (C, D) - one oesophageal and other pharyngeal c. One internal cuff (E) for obliterating the lumen of the internal tube at distal end. d. Three inflating balloon (G, H, 1) one for each cuff. It has 8 side slits (F) for ventilation when tube is in oesophagus e. Universal connector (K) for connecting the device to breathing circuit or AMBU-bag. There may be occasions when endotracheal intubation is not possible, but maintaining the patency of upper airway and preventing tracheal aspiration is required. Hence we designed this device as an alternative to laryngeal or tracheal placement. Blind insertion results in high probability to esophageal placement. In this case the obturator balloon is inflated to occlude lumen of the tube to prevent the air entry to stomach. The distal cuff is inflated with 10-15 ml of air to prevent peritubal leak and esophageal regurgitation, proximal cuff is inflated with 80-100 ml of air to prevent the escaping of gases through the mouth and nose, so gases go into the laryngeal inlet. The device has following advantages: • The technique of insertion is easy so can be used successfully in emergency situations and also where personnel trained in tracheal intubation are not available. • It can be used in patients with cervical spine injury in which neck movement should be avoided. • It can be used in patient with different height. • It can be used in patients with restricted month opening by nasal route.