Ultrasound Guided Cricoid and Paralaryngeal Pressure

University of Malaya

Status: Completed

Conditions: Ultrasonography, Interventional

Treatments: Other: paralaryngeal pressure; Other: cricoid pressure

Study type: Interventional

Funder types: Other

Identifiers

NCT04317976

45835 (Other Identifier)

2018118-6867

Details and patient eligibility

About

The primary objective is to study impact of upper airway ultrasonography in guiding anaesthetic assistant into providing accurate cricoid pressure, or both cricoid and paralaryngeal pressure in those with oesophagus deviation, achieving sonographic proven oesophageal occlusion compared to those without ultrasound guidance.

Full description

All patients consented for the study were having their airway examined via US. Cross sectional sonography of the airway was performed to determine the anatomic relationship of the oesophagus relative to the trachea:

1. before induction of anaesthesia
2. after GA before external airway pressure manoeuvre
3. after GA with external airway pressure manoeuvre.

US guided CP was applied on subjects with central oesophagus; CP and PLP were applied on subject with eccentric oesophagus anatomy.

PLP was performed by lateral compression on the eccentric oesophagus by fingertips under US guidance. To standardised the application of CP and PLP, only 2 well trained investigators were allowed to performed the CP and PLP, US scan on airway and patient recruitment. The conduct of trial involved 2 investigators where first investigator provide US scan, and second investigator provide compression of CP or PLP using fingertips guided by the instruction of first investigator.

Enrollment: 51 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

Elective list Under general anaesthesia Not intubated prior to OT

Exclusion criteria

Below 18 years old Pregnant Neck deformities Previous maxillofacial surgery

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Single Group Assignment

Masking: Double Blind

---

51 participants in 2 patient groups

Centrally located oesophagus post GA

Active Comparator group

Description:

Oesophagus remained central after general anaesthesia, cricoid pressure applied by fingertips under ultrasound guidance

Treatment:

Other: cricoid pressure

Eccentric located oesophagus post GA

Experimental group

Description:

Oesophagus eccentric located after general anaesthesia, paralaryngeal pressure and cricoid pressure applied by fingertips under ultrasound guidance

Treatment:

Other: paralaryngeal pressure