Ultrasonography, Interventional
Conditions
Keywords
Anatomy, oesophagus, ultrasound, incidence, cricoid, paralaryngeal
Brief summary
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.
Detailed 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.
Interventions
OTHERparalaryngeal pressure
cricoid pressure with paralaryngeal pressure by fingertips applied under ultrasound guidance
OTHERcricoid pressure
cricoid pressure by fingertips applied under ultrasound guidance
Sponsors
University of Malaya
Study design
Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Caregiver)
Masking description
Participant will not be informed of their anatomical details. Care provider will not be informed of their accuracy of performance of the airway manoeuvre.
Intervention model description
The study is a case-control intervention study, where all and every participant will be both the case and the control of their own.
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
Elective list Under general anaesthesia Not intubated prior to OT
Exclusion criteria
Below 18 years old Pregnant Neck deformities Previous maxillofacial surgery
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| The number of patients with eccentric oesophagus under general anesthesia, successfully occluded by using cricoid and paralaryngeal pressure. | ultrasound assessment of oesophagus done after general anaesthesia, during application of cricoid pressure, and during application of cricoid and paralaryngeal pressure | we are studying the effectiveness of cricoid pressure versus cricoid and paralaryngeal pressure(novel technique) in those patients with eccentric oesophagus under general anaesthesia. We use ultrasound to determined the position of the oesophagus after patient under general anaethesia ( to group them under central oesophagus and eccentric oesophagus) and also to determine the success of oesophagus occlusion. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| The number of patients with central oesophagus under general anesthesia, successfully occluded by using cricoid pressure. | ultrasound assessment of oesophagus done after general anaesthesia and during application of cricoid pressure | The objective is to study the effectiveness of cricoid pressure in those patients with central oesophagus under general anaesthesia. We use ultrasound to determined the position of the oesophagus after patient under general anaethesia, and also to determine the success of oesophagus occlusion. |
Other
| Measure | Time frame | Description |
|---|---|---|
| incidence of variation of oesophagus position before and after general anaesthesia | ultrasound assessment of position of oesophagus before and after general anaesthesia | We use ultrasound to determine the position of osephagus (central or eccentric) to determine the incidence of variation of oesophagus position before and after general anaesthesia. |
Countries
Malaysia
Outcome results
None listed