Miller Straight Blade vs Macintosh Blade

Tata Main Hospital

Status: Completed

Conditions: Intubation; Difficult

Treatments: Other: Miller group; Other: Macintosh group

Study type: Interventional

Funder types: Other

Identifiers

NCT02664532

PR/JHTMH/09242A

Details and patient eligibility

About

The purpose of this prospective open labeled randomized study was to compare the "laryngoscopic glottis view" as well as "ease of intubation" between the two blades in routine intubations in non-difficult airways.

Full description

One hundred and fifty patients with predicted non difficult airway were randomly assigned into two groups. After induction of anaesthesia laryngoscopy was performed with respective blades and trachea intubated. Parameters monitored were: glottis view obtained during laryngoscopy (Cormack Lehane grade), ease of intubation, intubation attempts, total duration of laryngoscopy in seconds and encountered complications.

Enrollment: 150 patients

Sex: All

Ages: 18 to 70 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• All ASA I & II grade patients undergoing elective surgery requiring general anesthesia with oral endotracheal intubation

Exclusion criteria

• Patients with anticipated difficult airway
• Cervical spine disorders
• Anesthesia requiring rapid sequence induction

Trial design

150 participants in 2 patient groups

Miller group

Experimental group

Description:

In Miller group, no 3 Miller blade was used for laryngoscopy by paraglossal technique. While intubating, the endotracheal tube (ETT) was directed underneath the laryngoscope blade without allowing it to go lateral to the blade. The curvature of the ETT automatically brings the tip towards the vocal cords as it was advanced. After successful endotracheal intubation, the ETT was attached to the circuit and anaesthesia continued as per plan.

Treatment:

Other: Miller group

Macintosh group

Other group

Description:

In Macintosh group, the curved blade was introduced to lift the base of the epiglottis to visualize larynx and then trachea intubated conventionally.After successful endotracheal intubation, the ETT was attached to the circuit and anaesthesia continued as per plan.

Treatment:

Other: Macintosh group