C-Spine Movement - Shikani Optical Scope vs Macintosh Laryngoscope for Patients With Cervical Spine Injury

Not Applicable

Completed

• Conditions: Wounds and Injuries

• Registration Number: NCT00310999
• Lead Sponsor: Lawson Health Research Institute

Brief Summary

Patients undergoing surgery will have laryngoscopy performed using two widely accepted techniques - Macintosh Laryngoscope and Shikani Optical Scope. The techniques will be timed and compared for cervical spine movement using fluoroscopy.

Detailed Description

Approval for the study has been obtained from the Review Board for Health and Sciences Research Involving Human Subjects of the University of Western Ontario. Informed and written consent will be obtained from patients who are undergoing elective surgery requiring general anesthesia with endotracheal intubation. Preoperative clinical assessment of the patients will include routine airway evaluation of dentition, mouth opening, tongue size, Mallampati score, and neck mobility.

While awake, the patients will be placed on the operating room table with a rigid board under their head, neck, and torso in order to simulate the table on which patients involved in trauma are placed in the emergency room. In-line stabilization (ILS), as recommended by the ATLS guidelines, will be applied to maintain the patient's head in the neutral position and reduce neck movement during laryngoscopy.

After standard pre-oxygenation, anesthesia will be induced in routine fashion with 2-3 mg/kg propofol and 2-5 mcg/kg fentanyl; rocuronium 0.8 mg/kg will be administered to effect muscle paralysis. The patient will be then be ventilated with sevoflurane in 100% Oxygen via bag and mask for 3 minutes.

After the patient is anesthetized, a sealed envelope containing computer a generated random assignment will be opened. Laryngoscopy will then be performed two times, with the Macintosh laryngoscope and with the Shikani Optical Scope, in random order as determined by the envelope. Between laryngoscopies, the patient will be ventilated with sevoflurane in 100% Oxygen.

For direct Macintosh laryngoscopy, a size 3 laryngoscope blade will be recommended in all patients. With laryngoscopy, the glottis will be exposed to enable positioning of the endotracheal tube at the vocal cords. During the second laryngoscopy in the above sequence, the trachea will be intubated.

The study is then complete. The hard board will be removed and the surgery will proceed in the usual fashion.

The laryngoscopy and intubation will be recorded by a portable fluoroscopy unit for subsequent review by the radiologist to assess relative neck movement.

Laryngoscopy time will be defined as the time from when the laryngoscope blade or Shikani stylet passes the teeth of the patient until the time the endotracheal tube is positioned at the opening of the larynx. If the intubation sequence is longer than 120 seconds, it will be deemed a failure and recorded as such.

The Cormack (11) of the larynx will be recorded for all patients.

Study Timeline

• Study Start: 2006-03
• Study First Submitted: 2006-04-03
• Study First Submitted QC: 2006-04-03
• Study First Posted: 2006-04-05
• Primary Completion: 2006-06
• Study Completion: 2006-09
• Status Verified: 2018-11
• Last Update Submitted: 2018-11-02
• Last Update Posted: 2018-11-06

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 24

Inclusion Criteria

• Elective non-cardiac surgery patients requiring intubation for the surgery.
• Age 18-75
• ASA 1-3
• Body Mass Index (BMI) < 40

Exclusion Criteria

• patients with previous neck surgery or unstable C-spine
• patients with Reflux disease (GERD)
• patients who are or may be pregnant

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Primary Outcome Measures

Name	Time	Method
cervical spine movement

Secondary Outcome Measures

Name	Time	Method
Duration of intubation

Trial Locations

Locations (1)

London Health Sciences Centre University Hospital Site; 🇨🇦 London, Ontario, Canada