Change of the vocal cord angel after neuromuscular blockade during use of a laryngeal mask airway

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00031663

Enrollment

Registered

2023-08-09

Start date

2023-12-06

Completion date

Unknown

Last updated

2026-06-01

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

Conditions

Effect of a laryngeal mask airway on the vocal cord angle during neuromusculare blockade

Interventions

Group 1: Treatment group: After placement of a laryngeal mask airway, patients receive a neuromuscular blocking agent. After confirming neuromuscular blockade, the change of the vocal cord angle due t

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: Patients, scheduled for general anesthesia with a laryngeal mask airway and need for neuromuscular blockade.

Exclusion criteria

Exclusion criteria: • missing written consent • Age III • gastrointestinal disease or complaints • gastroesophageal reflux disease • previous operations at the upper gastrointestinal tract • difficult airway • end-stage restrictive lung disease • pregnancy • BMI > 35 kg/m² • implanted defibrillators or pacemakers

Design outcomes

Primary

Measure	Time frame
Change of the vocal cord angle due to neuromuscular blocking agent	—

Secondary

Measure	Time frame
Influence of the placement of a laryngeal mask airway on vocal cord angle Comparisson of the vocal cord angle meassured in the endoscopic picture with the vocal cord angle detected with sonography Evluation of vocal cord movements depending on mechanical ventilation and neuromuscular blockade Meassurment of the cross sectional area of the glottal aperture depending on neuromuscular blockade Evlaution of an Electroglottography signal, recorded during mechanical ventilation via a laryngeal mask airway Effect of neuromuscular blocking on resistance and compliance of the respiratory system Comparison of change of the vcal cord angle and change of the resistance of the respiratory system during neuromuscular blockade Effect of a neurmuscular blocking agent of the oropharyngeal leaking pressure	—

Measure

Time frame

Influence of the placement of a laryngeal mask airway on vocal cord angle Comparisson of the vocal cord angle meassured in the endoscopic picture with the vocal cord angle detected with sonography Evluation of vocal cord movements depending on mechanical ventilation and neuromuscular blockade Meassurment of the cross sectional area of the glottal aperture depending on neuromuscular blockade Evlaution of an Electroglottography signal, recorded during mechanical ventilation via a laryngeal mask airway Effect of neuromuscular blocking on resistance and compliance of the respiratory system Comparison of change of the vcal cord angle and change of the resistance of the respiratory system during neuromuscular blockade Effect of a neurmuscular blocking agent of the oropharyngeal leaking pressure

—

Countries

Germany

Contacts

Public ContactJohannes Hell

Klinik für Anästhesiologie und Intensivmedizin, Universitätsklinikum Freiburg

johannes.hell@uniklinik-freiburg.de0761-270-23060

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Jun 11, 2026