Ultrasonographic evaluation of the submandibular space compliance to predict difficult airway in anaesthesia

Ultrasonographic evaluation of the submandibular space compliance to predict difficult airway in anaesthesia: a prospective diagnostic study

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

ISRCTN

Registry ID

ISRCTN34940667

Enrollment

120

Registered

2016-11-25

Start date

2016-10-01

Completion date

Unknown

Last updated

2018-08-27

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

Conditions

Management of the difficult airway Not Applicable

Interventions

After the Ethics Committee approval and signing the informed consent forms, adult patients scheduled to undergo general anaesthesia with oro-tracheal intubation are prospectively included. Exclusion c

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients aged over 18 undergoing elective general anaesthesia with oro-tracheal intubation

Exclusion criteria

Exclusion criteria: 1. Rapid sequence induction 2. External laryngeal manipulation during laryngoscopy 3. Emergency surgery 4. Videolaringoscopy

Design outcomes

Primary

Measure	Time frame
Submandibular space compliance (the ratio for the hio-mental distance in maximal hyperextended position and sniffing position to the same distance in neutral position), measured by airway ultrasound one day before surgery	—

Secondary

Measure	Time frame
Laryngeal view, assessed using the Cormack grade at induction of anaesthesia during the first laryngoscopy attempt	—

Countries

Romania

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026