الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Lower abdominal surgery is defined as abdominal surgery below the umbilicus. General or regional anaesthesia can be appropriate for patients undergoing abdominal surgery. Endotracheal intubation as well as supraglottic airway devices (SADs) can be used for airway control.
Endotracheal tube (ETT) is the gold standard device to maintain an airway; however, endotracheal intubation induces more intense haemodynamic effects and physical stress than those caused by the use of SADs. SADs refer to a broad set of medical devices capable of acting as a passageway for ventilation, oxygenation and administration of anaesthetic gases. Their adoption has increased gradually over the last decades, having become a fundamental tool in modern anaesthesiology.
Ambu aura40 is the world’s first reusable laryngeal mask to feature a built-in curve “70o curve” that carefully replicates natural human anatomy. This curve is molded directly into the tube so correct insertion is easy without abrading the upper airway. The unique curve also ensures that the patient’s head remains in a more natural position when the mask is in use without extra stress on the upper jaw.
The present study was conducted in Alexandria Main University Hospital on 48 adult patients of either sex, aged 20 to 40 years with American Society of Anaesthesiologists (ASA) physical status I or II and scheduled for elective lower abdominal surgery under general anaesthesia.
Patients were divided into two equal groups (twenty four patients each) in a randomized manner (closed envelope method):
group I: Patients received general anaesthesia using proper size of conventional oral endotracheal tubes for intubation.
group II: Patients received general anaesthesia using the proper size of Ambu Aura40.
Evaluation of patients was carried out through proper history taking, clinical examination and routine laboratory investigations.
General anaesthesia was induced after placement of routine monitors and the proper airway device “ETT or Ambu Aura40” was inserted and the lungs mechanically ventilated.
The two groups were compared as regards: Haemodynamic responses (HR, SBP, DBP, and MBP), SpO2, respiratory mechanics (Tidal volume, peak airway pressure, dynamic compliance, and airway resistance), ETCO2 and postoperative complications (e.g. vomiting, sore throat, dysphagia, dysphonia, arrhythmias).
Demographic data of age, weight, height and duration of surgery were comparable between the two groups.
Regarding haemodynamic parameters, in group I they were significantly higher immediately after intubation and 15 min thereafter compared to pre-induction values and also 5 min post-extubation. While in group II all values were significantly lower than the pre-induction ones. Comparing both groups, values immediately after intubation, after 15 and 30 minutes from intubation and 5 min after extubation were significantly higher relative to the comparable measured values in group II.
Regarding SpO2, ETCO2, and respiratory mechanics there were no significant differences between both groups all through the study.
Regarding postoperative complications, only sore throat was reported and it was significantly higher in group I compared to group II.