Correlation of Neck Circumference With Difficult Mask Ventilation and Difficult Laryngoscopy in Morbidly Obese Patients

Study Overview
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Brief Summary
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The aim of this study is to determine the correlation of neck circumference with difficult mask ventilation and laryngoscopy in morbidly obese patients.

Detailed Description
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Patients' Mallampati score, upper lip bite test, neck mobility, teeth abnormalities were evaluated preoperatively. Mouth opening, sternomental and thyromental distances, neck circumference, thoracic circumference, breast circumference , belly circumference and hip circumference were measured preoperatively. After anesthesia induciton with propofol and rocuronium, patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. Laringoscopy was performed with MacIntosh laryngoscop and Cormack Lehane (CL) score was evaluated. CL score III and IV were defined as difficult laryngoscopy.

Official Title
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Correlation of Neck Circumference With Difficult Mask Ventilation and Difficult Laryngoscopy in Morbidly Obese Turkish Patients: A Prospective Clinical Trial

Conditions
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Morbid Obesity

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: BMI >= 40 American Society of Anesthesiologists (ASA) Physical Status I-III Patients applied for elective surgery Exclusion Criteria: BMI < 40 maxillofacial tumor or fracture mass at the neck mass in the thorax or mediastina scar at the neck area previous radiotherapy history to neck area history of cervical vertebra operations cervical vertebra structure abnormality

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Correlation of difficult laryngoscopy with neck circumference | Cormack Lehane scores III and IV were defined as difficult laryngoscopy. | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with neck circumference | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Correlation of difficult laryngoscopy with modified mallampati score | Cormack Lehane scores III and IV were defined as difficult laryngoscopy. | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with modified mallampati score | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed after during mask ventilation | 
| Correlation of difficult laryngoscopy with neck movement | Cormack Lehane scores III and IV were defined as difficult laryngoscopy. | Cormack Lehane score was assessed during laryngoscopy | 
| with neck movement | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 
| Correlation of difficult laryngoscopy with dentition | Cormack Lehane scores III and IV were defined as difficult laryngoscopy. | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with dentition | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 
| Correlation of difficult laryngoscopy with upper lip bite test | Cormack Lehane scores III and IV were defined as difficult laryngoscopy | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with upper lip bite test | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 
| Correlation of difficult laryngoscopy with mouth opening | Cormack Lehane scores III and IV were defined as difficult laryngoscopy | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with mouth opening | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 
| Correlation of difficult laryngoscopy with sternomental distance | Cormack Lehane scores III and IV were defined as difficult laryngoscopy | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with sternomental distance | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 
| Correlation of difficult laryngoscopy with breast circumference | Cormack Lehane scores III and IV were defined as difficult laryngoscopy | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with breast circumference | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 
| Correlation of difficult laryngoscopy with thorax circumference | Cormack Lehane scores III and IV were defined as difficult laryngoscopy | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with thorax circumference | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 
| Correlation of difficult laryngoscopy with waist circumference | Cormack Lehane scores III and IV were defined as difficult laryngoscopy | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with waist circumference | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 
| Correlation of difficult laryngoscopy with hip circumference | Cormack Lehane scores III and IV were defined as difficult laryngoscopy | Cormack Lehane score was assessed during laryngoscopy | 
| Correlation of difficult mask ventilation with hip circumference | Patients' mask ventilation difficulty was evaluated as defined below: V1- Ventilated by single anesthesist easily; V2- Ventilated by single anesthesist with oral airway; V3- Ventilated by two anesthesists; V4- Unable to mask ventilate. V3 and V4 was defined as difficult mask ventilation. | Ventilation difficulty scale was assessed during mask ventilation | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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morbid obesity, neck circumference, difficult mask ventilation, difficult laryngoscopy