Comparison of ultrasonography of neck and stomach to detect air entry into stomach during start of general anaesthesia .
Not Applicable
Completed
- Conditions
- Health Condition 1: R00-R99- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Recruitment & Eligibility
- Status
- Completed
- Sex
- Not specified
- Target Recruitment
- 90
Inclusion Criteria
Patients more than 18 years of age, undergoing elective surgery under general anaesthesia with endotracheal tube, in JIPMER-Puducherry.
Exclusion Criteria
1.Patients requiring rapid-sequence induction.
2.Patients with naso-gastric tube in-situ.
3. Patients with neck swelling, deformities of neck preventing upper oesophageal ultrasound.
4. Patients with oesophageal/gastric pathology/GERD.
5.Patients with air in gastric antrum prior to FMV
Study & Design
- Study Type
- Observational
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method To compare the incidence of â??comet-tailâ?? artefact with real-time cervical oesophageal ultrasonography and gastric antral ultrasonography. <br/ ><br>Timepoint: â??Comet-tailâ?? artefacts, a marker of air entry intro the oesophagus will be looked for during face mask ventilation for 3 minutes during induction of general anaesthesia . This will be compared with the â??comet-tailâ?? artefacts in the gastric antrum after the placement of endotracheal tube.Since air has to traverse through oesophagus before entering stomach, a better alternative and more sensitive method would be to look for oesophageal insufflation during face mask ventilation. <br/ ><br>
- Secondary Outcome Measures
Name Time Method To identify the lowest peak airway pressure at which â??comet-tailâ?? artefacts appear in the oesophagus during facemask ventilation.Timepoint: This will be looked for in 3 minutes of face mask ventilation during induction.Ability to do face-mask ventilation will be tested using pressure-controlled mode of ventilation with an inspiratory pressure of 10cmH2O, the inspiratory pressure will be stepped up or down in increments of 2 cmH2O to achieve a target tidal volume of 8 ml.kg-1.Lowest peak airway pressure at which comet tail artefacts appear will be noted.