To correlate position of larynx seen under ultrasound machine and seen with help of direct laryngoscopy

Phase 4

Not yet recruiting

Conditions: Posted for elective surgery under general anaesthesia

Registration Number: CTRI/2018/02/011728

Lead Sponsor: Shri sathya Sai medical college

Brief Summary: The study protocol will be explained to the patients and informed consent will be obtained. Ultrasound examination of upper airway will be done in sniffing and neutral position. Hyomental distance will be measured. Anterior neck soft tissue thickness will be seen at level of vocal cords. The transverse processes of cervical vertebrae corresponding to the vocal cords will be noted. That will be taken as laryngeal position. After shifting the patient to the OT standard protocol for induction of anaesthesia will be followed. Muscle relaxation will be achieved with inj vecuronium in all patients. Laryngoscopy will be done with Macintosh blade,size 3 in female patients and size 4 in male patients. Laryngoscopy will be done first in neutral position and modified Cormack Lehane grading (CML) will be noted. If CML is more than I then backward upwards rightwards pressure (BURP) will be applied and if there is change in CML due to BURP will be noted. Same procedure will be repeated in sniffing position. After confirming the CML with BURP, trachea will be intubated with appropriate size entotracheal tube. Capnographic confirmation of entotracheal intubation will be end point of study. Inability to visualize vocal cords after optimal sniffing position with BURP will be manage according to difficult airway management protocol and findings will be noted.

Detailed Description: Not available

Recruitment & Eligibility

Status: Not Yet Recruiting

Sex: All

Target Recruitment: 215

Inclusion Criteria

1.Willingness to participate in the study 2.ASA I or II physical status 3.Surgeries under general anesthesia requiring endotracheal intubation.

Exclusion Criteria

1.ASA III or above 2.Mouth opening less than 2 finger breadth 3.Temporo mandibular joint stiffness 4.Ankylosing spondylosis 5.Submucosal fibrosis 6.Pregnancy 7.Buck tooth 8.Any cervical spine pathology 9.Infections of airway.

Study & Design

Study Type: Observational

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
To correlate position of larynx on ultrasound with direct laryngoscopy in sniffing position and neutral position	Ultrasonography before starting of anaesthesia \| Cormack Lehane grading at laryngoscopy

Secondary Outcome Measures

Name	Time	Method
To correlate Cormack Lehane grading with mentohyoid distance and anterior neck soft tissue thickness on ultrasound in both positions.	Ultrasonography before starting of anaesthesia

Trial Locations

Locations (1): Shri Sathya Sai Medical College and Hospital
🇮🇳
Kancheepuram, TAMIL NADU, India
Shri Sathya Sai Medical College and Hospital
🇮🇳Kancheepuram, TAMIL NADU, India
Dr Pranjali Kurhekar
Principal investigator
9486414942
pranjalikurhekar@gmail.com