- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04138121
Impact of Change of Head and Neck Position on Cricothyroid Membrane Localization and Membrane Height in Parturient Patients
Impact of Change of Head and Neck Position on Cricothyroid Membrane Localization and Membrane Height in Parturient Patients: an Observational Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
This is an observational study.
Participants:
- One of two anesthesiologists trained in cricothyroid membrane ultrasound scanning technique in pregnant population (study investigators)
- Subjects to be assessed: pregnant patients in their third trimester on the labor and delivery floor comfortable enough to take part in the study
Two anesthesiologists will undergo ultrasound imaging training by an expert staff anesthesiologist whom is already trained in the procedure. As per previous published evidence on this, the investigator will need to correctly identify the location of cricothyroid membrane and its height in 15 volunteers. This will constitute the standardized training component of the study.
Upon admission to the Labor and Delivery floor, women will be further explained the protocol and asked to sign the consent form. Then, they will have the cricothyroid membrane assessed, as per description above, and quantitative assessment will be performed. Firstly, quantitative assessment of the height of the cricothyroid membrane will be performed in the supine position (with left uterine displacement) with the neck in the neutral position. The central point of the cricothyroid membrane will be marked using a removable skin ink marker. The patient will then be asked to fully their neck. The change in distance of the midpoint of the cricothyroid membrane from the neutral head and neck position to fully extended positioned will be performed, as will the change in height of the cricothyroid membrane between the two positions.
Quantitative assessment for change in central cricothyroid membrane distance will be done with measuring central points marked on the patients neck with skin marker ink. Quantitative assessment of change in cricoid thyroid membrane will be conducted using caliper measuring software build into the ultrasound machinery. Finally, the investigators will establish the starting distance above the sternal notch over which a theoretical 8cm incision in the neck which will overlie the cricothyroid membrane. This will be done by measuring the distance above the sternal notch with a surgical measuring ruler.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Ontario
-
Toronto, Ontario, Canada, M5G1X5
- Mount Sinai Hospital
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Pregnant patients in third trimester (>28/40 weeks)
- Ability to understand the rationale of the study assessments and to provide signed consent.
Exclusion Criteria:
- Neck arthritis
- Cervical stenosis
- Known cervical degenerative disc disease
- Rheumatoid Arthritis
- Any restriction of neck movement
- Upper limb neurology
- Patient refusal
- Non pregnant patients
- Pregnant patients less than 28 weeks pregnant
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Ultrasound
Ultrasound measurements of the cricothyroid membrane.
|
Ultrasound scan of the cricothyroid membrane
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Cricothyroid membrane position change
Time Frame: 30 minutes
|
To measure the distance the center of the cricothyroid membrane changes position on ultrasound between neutral and maximal neck extension in third trimester patients.
|
30 minutes
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Cricothyroid membrane size change
Time Frame: 30 minutes
|
To measure the distance that the size of the cricothyroid membrane changes position on ultrasound between neutral and maximal neck extension in third trimester patients.
|
30 minutes
|
Distance above sternal notch
Time Frame: 30 minutes
|
The starting distance above the sternal notch in the neck over which an 8cm incision in the neck should overlie the cricothyroid membrane
|
30 minutes
|
Collaborators and Investigators
Investigators
- Principal Investigator: Naveed Siddiqui, MD, Mount Sinai Hospital
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 19-05
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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