Effects of One-handed and Two-handed Mask Ventilation Techniques on Global and Regional Lung Ventilation

Fudan University

Status: Unknown

Conditions: Anesthesia

Treatments: Other: One-handed mask ventilation; Other: Two-handed mask ventilation

Study type: Interventional

Funder types: Other

Identifiers

NCT04617665

Mask ventilation

Details and patient eligibility

About

Two-handed mask ventilation has been shown to provide higher tidal volume than one-handed mask ventilation. The effects of the two techniques on respiratory mechanics during induction of general anesthesia, however, still need to be determined.

Full description

Mask positive pressure ventilation always causes the changes of respiratory mechanics such as ventral redistribution of regional ventilation, which impairs gas exchange. Two-handed mask ventilation has been shown to improve gas exchange by providing higher tidal volume than one-handed mask ventilation. We hypothesis that those higher tidal volume caused by two-handed mask ventilation would also improve the respiratory mechanics during induction of general anesthesia.

Enrollment: 80 estimated patients

Sex: All

Ages: 18 to 85 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Scheduled for elective surgery with general anesthesia
• American Society of Anesthesiologist (ASA) physical class of I-II.

Exclusion criteria

• acute and chronic respiratory disorders, including chronic obstructive
• pulmonary disease (COPD) and asthma;
• a history of lung surgery;
• exist risk of reflux and aspiration;
• patients requiring an awake intubation;
• facial and thoracic deformities;
• implants exist in the body, such as cardiac pacemakers;
• pregnant women.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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80 participants in 2 patient groups

One-handed mask ventilation

Other group

Description:

For the one-handed mask ventilation, only one hand can be used to achieve the face mask seal. The left thumb and index finger form a ''C,'' providing anterior pressure over the mask, while the third, fourth, and fifth fingers form an ''E'' to lift the jaw.

Treatment:

Other: One-handed mask ventilation

Two-handed mask ventilation

Other group

Description:

For the two-handed mask ventilation, the provider's thumb and thenar eminence of each hand are held parallel, adjacent to the mask connector, and depress each side of the mask. The second through fifth digits wrap around and elevate the mandible to draw it anteriorly into the mask establishing both a jaw-thrust and chin-lift maneuver when appropriate.

Treatment:

Other: Two-handed mask ventilation