Changes in Anatomical Landmark Locations

Completed

• Conditions: Anesthesia, General; Intubation
• Interventions: Behavioral: head position change

• Registration Number: NCT01168453
• Lead Sponsor: Soonchunhyang University Hospital

Brief Summary

This study was performed to ultrasonographically demonstrate the changes in relationship between the right internal jugular vein (IJV) and an anatomical landmark in two different head positions: neutral and rotational.

Detailed Description

Background: This study was performed to ultrasonographically demonstrate the changes in relationship between the right IJV and an anatomical landmark in two different head positions: neutral and rotational.

Methods: One hundred patients scheduled for elective surgery under general anesthesia with endotracheal intubation were enrolled in this study. The patients were placed in the supine position with a neutral head position and without a pillow. The apex of the triangle formed by the sternal and clavicular heads of the sternocleidomastoid muscle and clavicle was marked (anatomical landmark point: AL point). The ultrasonography of the neck anatomy was performed, and a mark was placed at the central point of the IJV to the skin (ultrasonography point: US point). The other investigator measured the distances from the AL point to the US point (AL-US distance). The patient's head was then turned 30° to the left; the same procedure was repeated and the AL-US distance was again measured. The changes in AL-US distance were calculated.

Study Timeline

• Study Start: 2009-05
• Primary Completion: 2010-02
• Study Completion: 2010-04
• Status Verified: 2010-07
• Study First Submitted: 2010-07-21
• Study First Submitted QC: 2010-07-22
• Study First Posted: 2010-07-23
• Last Update Submitted: 2010-08-06
• Last Update Posted: 2010-08-09

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

• 100 patients weighing 40 - 100 kg and with heights of 140 - 190 cm

Exclusion Criteria

• a history of neck surgery or trauma involving the neck, previous IJV-related interventions (e.g., venous catheterization), limitation of neck movement, and a body mass index ≥ 30.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
neutral head position	head position change	supine with neutral head position
head rotation	head position change	supine with 30° head rotation

Primary Outcome Measures

Name	Time	Method
anatomical landmark point (AL) - ultrasonography point (US) distance(the distances from the AL point to the US point )	within 5 minutes after itubation	The distance between the two points was considered "positive" if the US point was lateral to the AL point and "negative" if it was medial to the AL point.

Secondary Outcome Measures

Name	Time	Method
The average depth of the right IJV	within 5 minutes after intubation	measure the depth of the right IJV center in ultrasonography

Trial Locations

Locations (1)

Soonchunhyang University Hospital; 🇰🇷 Seoul, Korea, Republic of