i-gel Plus is a novel supraglottic airway device (SGA). Feasibility of second-generation SGAs in patients undergoing elective laparoscopic surgery has been demonstrated in various studies. During laparoscopic surgery intrabdominal pressure is increased by capnoperitoneum and frequently minute ventilation has to be adopted to counteract hypercapnia, and higher inspiratory peak pressures have to be expected. It is uncertain, however, if the i-gel Plus facilitates appropriate ventilation with low leakage volumes in patients undergoing laparoscopic surgery. The primary aim of this single-center non-inferiority study is to assess the leak fraction of the i-gel Plus under conditions of capnoperitoneum (with and without Trendelenburg position) and to compare it with baseline conditions. Secondary aims are to assess secondary outcome parameters during capnoperitoneum (with and without Trendelenburg position) and to compare them with baseline conditions.
Study Type
OBSERVATIONAL
Enrollment
48
University Medical Center Hamburg-Eppendorf
Hamburg, Hamburg, Germany
Leak fraction
Ventilation parameter - volume per tidal volume
Time frame: 3 houres
Oropharyngeal seal pressure [cm H2O]
Clinical assessment - leak pressure with audible leak
Time frame: 3 houres
Leakage volume (ml)
Ventilation parameter - as displayed on the ventilator
Time frame: 3 houres
Tidal volume (ml)
Ventilation parameter - as displayed on the ventilator
Time frame: 3 houres
Inspiratory peak pressure (cm H2O)
Ventilation parameter - as displayed on the ventilator
Time frame: 3 houres
Positive endexpiratory pressure (PEEP) (cm H2O)
Ventilation parameter - as displayed on the ventilator
Time frame: 3 houres
Intraabdominal pressure under capnoperitoneum [mmHg]
Measured intraoperativ under capnoperitoneum \[mmHg\]
Time frame: 3 houres
Respiratory rate (1/min)
Ventilation parameter - as displayed on the ventilator
Time frame: 3 houres
Minute ventilation (l/min/kg)
Ventilation parameter - as displayed on the ventilator
Time frame: 3 houres
Endtidal CO2 [mmHg]
Ventilation parameter - as displayed on the ventilator
Time frame: 3 houres
Number of insertion attempts
Clinical assessment - SGA insertion attempts
Time frame: 3 houres
Insertion success rate (%)
Clinical assessment
Time frame: 3 houres
First-attempt insertion success rate (%)
Clinical assessment - successful placement in only one insertion attempt
Time frame: 3 houres
Necessity of adjustment maneuvers during the procedure
Clinical assessment
Time frame: 3 houres
Insertion time (sec)
Clinical assessment
Time frame: 3 houres
Lowest oxygen saturation (%)
Measured by pulse oximetry
Time frame: 3 houres
Difficulty of insertion
Clinical assessment on a scale between 1-5
Time frame: 3 houres
Ease of gastric tube insertion
Clinical assessment - rating on a scale from 1-5
Time frame: 3 houres
Postoperative complications
Clinical assessment
Time frame: 24 hours postoperatively
Complications at the end of surgery
Clinical assessment
Time frame: 3 hours
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