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Completed

NCT Number: NCT02589015

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

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

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Key information

Conditions

Morbid Obesity Body Weight Nutrition Disorders Nutritional and Metabolic Diseases Obesity Obesity, Morbid Overnutrition Overweight Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Istanbul University Cerrahpasa Medical Faculty

Istanbul, 34098, Turkey (Türkiye)

About this study

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.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Primary outcomes

  1. Correlation of difficult laryngoscopy with neck circumference

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy.

  2. Correlation of difficult mask ventilation with neck circumference

    Time frame: 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 outcomes

  1. Correlation of difficult laryngoscopy with modified mallampati score

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy.

  2. Correlation of difficult mask ventilation with modified mallampati score

    Time frame: 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.

  3. Correlation of difficult laryngoscopy with neck movement

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy.

  4. with neck movement

    Time frame: 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.

  5. Correlation of difficult laryngoscopy with dentition

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy.

  6. Correlation of difficult mask ventilation with dentition

    Time frame: 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.

  7. Correlation of difficult laryngoscopy with upper lip bite test

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy

  8. Correlation of difficult mask ventilation with upper lip bite test

    Time frame: 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.

  9. Correlation of difficult laryngoscopy with mouth opening

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy

  10. Correlation of difficult mask ventilation with mouth opening

    Time frame: 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.

  11. Correlation of difficult laryngoscopy with sternomental distance

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy

  12. Correlation of difficult mask ventilation with sternomental distance

    Time frame: 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.

  13. Correlation of difficult laryngoscopy with breast circumference

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy

  14. Correlation of difficult mask ventilation with breast circumference

    Time frame: 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.

  15. Correlation of difficult laryngoscopy with thorax circumference

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy

  16. Correlation of difficult mask ventilation with thorax circumference

    Time frame: 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.

  17. Correlation of difficult laryngoscopy with waist circumference

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy

  18. Correlation of difficult mask ventilation with waist circumference

    Time frame: 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.

  19. Correlation of difficult laryngoscopy with hip circumference

    Time frame: Cormack Lehane score was assessed during laryngoscopy

    Cormack Lehane scores III and IV were defined as difficult laryngoscopy

  20. Correlation of difficult mask ventilation with hip circumference

    Time frame: 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.

Sponsors and collaborators

Lead sponsor

Istanbul University

Other

Registry information

Official study title

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

Important dates

Study start
2015
Primary completion
2015
Study completion
2015
First posted
Oct 28, 2015
Registry last updated
Feb 11, 2016

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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