Influence of Gastric Tube Presence in Upholding the Correct Placement of LMA Blockbuster

Study Overview
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Brief Summary
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Since its invention in 1981 by Dr. Archie Brain, the classical laryngeal mask airway (LMA ) has undergone many modifications. Today various LMAs are available that can also help in Ryle's tube insertion, intubation via LMA, deep extubation, adjunct in difficult airway and for spontaneous ventilation in short procedures. One of the newer modifications is the Blockbuster LMA. It was invented by Prof. Ming Tian, the president of Chinese Difficult Airway Society and is being increasingly used for cases of difficult intubation. It has some unique features like its 95 degrees angulated airway that makes it easier to insert. It also has a gastric port and provides better sealing pressures at lower volumes. However the one of the major concern with supraglottic airway is that despite correct placement it may dislodge, or its position may change intraoperatively especially in surgeries where patient position needs to be changed or patient is moved/transferred or head and neck surgeries. In this study investigator wishes to evaluate weather gastric tube inserted through LMA helps in maintaining the LMA blockbuster placement by comparing fibreoptic bronchoscope (FOB) scores recorded immediately after LMA placement and at the end of the surgical procedure.

Detailed Description
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Following approval by the Board of studies, Department of anaesthesiology and ethical committee of this institution the study will be conducted in J N Medical College and hospital on 60 patients undergoing operative procedures under general anaesthesia. Patients will be included in the study after well informed written consent, including the information that they would be part of this ongoing institutional research. STUDY DESIGN Prospective randomised controlled study STUDY POPULATION The study will be conducted on 60 patients admitted to JNMCH, AMU Aligarh planned for operative procedure under general anaesthesia. In this study investigator wishes to evaluate weather gastric tube inserted through LMA helps in maintaining the LMA blockbuster placement by comparing fibreoptic bronchoscope (FOB) scores recorded immediately after LMA placement and at the end of the surgical procedure.

Official Title
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Determining the Influence Gastric Tube Presence in Upholding the Correct Placement of LMA Blockbuster During Surgery.

Conditions
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Anesthesia

Intervention / Treatment
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* Device: LMA BLOCKBUSTER


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: ASA Grade I & II patients Age between 20-70 years Weight between 40-70 kg Patients of both sexes All classes of MP Grades Exclusion Criteria: Any pathology of the oral cavity that may obstruct the insertion of device Mouth opening less than 2.5cm. Potentially full stomach patients (trauma, morbid obesity, history of gastric regurgitation and heart burn, full term pregnancy) risk of oesophageal reflux (hiatus hernia) Bleeding disorder Unable to provide informed consent

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Device: LMA BLOCKBUSTER|In this study we wish to evaluate weather gastric tube inserted through LMA helps in maintaining the LMA blockbuster placement by comparing fibreoptic bronchoscope (FOB) scores recorded immediately after LMA placement and at the end of the surgical procedure.|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| POGO SCORE | Grading the placement of LMA blockbuster through Fibreoptic Bronchoscope score of at the start and end of the surgery. | IMMEDIATELY AFTER LMA PLACEMENT AND AT THE END OF SURGERY JUST BEFORE REMOVAL OF LMA | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| GASTRIC TUBE INSERTION SUCCESS RATE | Ease and success rate of gastric tube insertion; number of attempts taken if successfull | within 2 minutes of LMA Blockbuster placement |