Can Neck Circumference Measurements Less Than 43cm or Greater Than 43cm Predict Difficulty of Tracheal Intubation?

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01191658

Enrollment

216

Registered

2010-08-31

Start date

2010-08-01

Completion date

2010-12-01

Last updated

2026-08-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Neck Circumference, Difficulty of Tracheal Intubation

Brief summary

The circumference of a person's neck is a useful predictor of difficulty of insertion of a breathing tube.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 80 Years

Healthy volunteers

Yes

Inclusion criteria

* American Society of Anesthesiologists physical status 1-4 * Receiving general endotracheal anesthesia for surgery

Exclusion criteria

* Limited range of motion of the neck or jaw * Cervical spine injuries * Upper airway pathology * Previous facial trauma, or goiter * Patients receiving regional anesthesia or anesthesia other than general, endotracheal anesthesia

Design outcomes

Primary

Measure	Time frame	Description
Predictive value of neck circumference and Mallampati class for difficult tracheal intubation	During the immediate preoperative period and anesthesia induction (at the time of intubation)	Evaluation of neck circumference (using a 43 cm threshold) and Mallampati classification as preoperative clinical predictors of difficult tracheal intubation.

Countries

United States

Outcome results