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

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

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT02589015

Enrollment

120

Registered

2015-10-28

Start date

2015-03-31

Completion date

2015-12-31

Last updated

2016-02-11

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

Conditions

Morbid Obesity

Keywords

morbid obesity, neck circumference, difficult mask ventilation, difficult laryngoscopy

Brief summary

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

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.

Interventions

None listed

Study design

Observational model

CASE_ONLY

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 65 Years

Healthy volunteers

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

Design outcomes

Primary

Measure	Time frame	Description
Correlation of difficult laryngoscopy with neck circumference	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy.
Correlation of difficult mask ventilation with neck circumference	Ventilation difficulty scale was assessed during mask ventilation	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.

Secondary

Measure	Time frame	Description
Correlation of difficult laryngoscopy with neck movement	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy.
with neck movement	Ventilation difficulty scale was assessed during mask ventilation	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.
Correlation of difficult laryngoscopy with dentition	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy.
Correlation of difficult mask ventilation with dentition	Ventilation difficulty scale was assessed during mask ventilation	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.
Correlation of difficult laryngoscopy with upper lip bite test	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy
Correlation of difficult mask ventilation with upper lip bite test	Ventilation difficulty scale was assessed during mask ventilation	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.
Correlation of difficult laryngoscopy with mouth opening	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy
Correlation of difficult mask ventilation with mouth opening	Ventilation difficulty scale was assessed during mask ventilation	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.
Correlation of difficult laryngoscopy with sternomental distance	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy
Correlation of difficult laryngoscopy with modified mallampati score	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy.
Correlation of difficult laryngoscopy with breast circumference	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy
Correlation of difficult mask ventilation with breast circumference	Ventilation difficulty scale was assessed during mask ventilation	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.
Correlation of difficult laryngoscopy with thorax circumference	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy
Correlation of difficult mask ventilation with thorax circumference	Ventilation difficulty scale was assessed during mask ventilation	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.
Correlation of difficult laryngoscopy with waist circumference	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy
Correlation of difficult mask ventilation with waist circumference	Ventilation difficulty scale was assessed during mask ventilation	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.
Correlation of difficult laryngoscopy with hip circumference	Cormack Lehane score was assessed during laryngoscopy	Cormack Lehane scores III and IV were defined as difficult laryngoscopy
Correlation of difficult mask ventilation with hip circumference	Ventilation difficulty scale was assessed during mask ventilation	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.
Correlation of difficult mask ventilation with sternomental distance	Ventilation difficulty scale was assessed during mask ventilation	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.
Correlation of difficult mask ventilation with modified mallampati score	Ventilation difficulty scale was assessed after during mask ventilation	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.

Countries

Turkey (Türkiye)

Outcome results