NC/TMD Ratio As a Difficult Airway Predictor in Obese Patients

Neck Circumference to Thyromental Distance Ratio As a Reliable Indicator for Predicting Difficult Intubation in Obese Patients for Elective Surgery Under General Anesthesia

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT05735106

Enrollment

220

Registered

2023-02-21

Start date

2021-10-21

Completion date

2022-05-21

Last updated

2024-10-10

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

Conditions

Difficult / Failed Intubation

Keywords

difficult intubation, NC/TM distance ratio, intubation difficulty score

Brief summary

To assess accuracy of NC/TM distance ratio in terms of sensitivity, specificity, negative predictive value (NPV) and positive predictive value (PPV) for predicting difficult intubation in obese patient with Intubation difficulty score (IDS) as gold standard.

Detailed description

At Preanaesthesia clinic patients , neck circumference to Thyromental distance ratios of obese patients with BMI \>30Kg/m2 will be calculated and patients will be divided into two groups on the basis of Nc/TMD ratio as anticipated easy intubation ( NC/TMD\<5) And anticipated difficult intubation ( NC/TMD ≥5). Intra-operatively, patients Intubation difficulty scale score will calculated and the data obtained from IDS score will be compared with NC/TMD ratio as a predictor of difficult Intubation and diagnostic accuracy of NC/TMD as a reliable indicator of difficult intubation in obese patients will be calculated by statistical analysis.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 65 Years

Healthy volunteers

Yes

Inclusion criteria

1. ASA physical status I to III 2. Body Mass Index (BMI) of 30kg/m2 or more 3. age 18-65 years

Exclusion criteria

1. non consenting 2. ASA class greater than III, 3. patients undergoing general anesthesia without tracheal intubation or under regional anesthesia, 4. patients with upper airway pathology such as maxillofacial fractures, upper airway tumors or cervical spine fracture, obstetric patients, refusal of the patient, previous head and neck surgery or radiotherapy.

Design outcomes

Primary

Measure	Time frame	Description
Predictability of difficult airway	During anaesthesia induction	At the preanaesthetic examination neck circumference to thyromental distance ratio will be caculated in obese patients with BMI ≥ 30KG/m2 and the predictability of difficult airway will be evaluated by statistical analysis

Countries

Pakistan

Outcome results