Comparison of Various Measures for Anticipating Difficult Laryngoscopy in Turkish Population: An Observational Study
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Enrollment
- 145
- Locations
- 1
- Primary Endpoint
- Difficult laryngoscopy
Study Overview
Brief Summary
Demographic features and eight diagnostic variables were evaluated for difficult laryngoscopy (DL) predictivity. These were retrognathia, presence of buck teeth, modified Mallampati test (MMT), upper lip bite test (ULBT), sternomental distance (SMD), interincisor distance (IID), thyromental distance, and neck circumference. DL was identified by Grade III-IV view during laryngoscopy according to the Cormack-Lehane (CL) classification.
Detailed Description
Creating a regression model among selected bedside tests for predicting difficult laryngoscopy )defined as Grade III or IV view during laryngoscopy according to Cormack-Lehane classification) is the primary objective. Recruiting of 145 ASA I-II adult patients who would have an elective surgery under general anesthesia were planned.
Criteria for exclusion were: a history of craniofacial surgery or restriction of cervical mobility, edentulous patients, pregnant women, patients who did not have a proper mouth opening (< 3 cm), and those who might require awake intubation or rapid sequence induction, cancellation of the surgery or change in the anesthetic strategy.
The selected tests and clinical situations were:
The presence of retrognathia (reduced temporomandibular joint-incisor distance) Buck teeth Modified Mallampati test (MMT) in the sitting position without phonation. A scale ranging between 1 and 4 points is used and scores of 3 or 4 are considered as predictors of DL. Upper lip bite test (ULBT) performed in a neutral position. ULBT is graded as 1-3 according to the extension ability of lower incisors.
Sternomental distance - The distance between the mentum and upper border of the manubrium sterni when the head is fully extended and the mouth is closed.
Study Design
- Study Type
- Observational
- Observational Model
- Case Control
- Time Perspective
- Cross Sectional
Eligibility Criteria
- Ages
- 18 Years to 65 Years (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •Candidate for elective surgery under general anesthesia
Exclusion Criteria
- •History of craniofacial surgery or restriction of cervical mobility,
- •Edentulous patients
- •Pregnancy
- •Patients who do not have a proper mouth opening (< 3 cm)
- •Patients who might require awake intubation or rapid sequence induction.
Outcomes
Primary Outcomes
Difficult laryngoscopy
Time Frame: Up to two weeks after preoperative examination
Grade III or IV laryngeal view before endotracheal intubation
Secondary Outcomes
No secondary outcomes reported
Investigators
Derya Ozden Omaygenc
M.D.
Haseki Training and Research Hospital
