Optimal Head Rotation and External Landmark for Internal Jugular Vein Cannulation After Placement of Proseal Laryngeal Mask Airway

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Gwak Mi Sook, Samsung Medical Center
ClinicalTrials.gov Identifier:
NCT01407302
First received: July 21, 2011
Last updated: December 24, 2013
Last verified: December 2013
  Purpose

Recently, laryngeal mask airway (LMA) placements are frequently performed for general anesthesia. The investigators occasionally encounter a clinical situation to perform internal jugular vein (IJV) cannulation after LMA insertion, especially for difficult airway in subjects undergoing major surgery. However, anatomic relations of IJV and common carotid artery (CCA) in patient with LMA placement have been reported to be different from those in patients with endotracheal tube. The degree of overlapping of the right IJV and CCA after LMA placement was greater than before LMA placement. Furthermore, there are many cases of complete overlapping right IJV and CCA after LMA placement. Therefore, the risk of puncturing CCA increases when the investigators try to cannulate IJV after LMA placement. Furthermore, the central landmark commonly used for IJV cannulation was proved to show low success rate after LMA placement in previous report.

The investigators carefully examined the anatomic relations of IJV and CCA after LMA insertion with ultrasonography, and found that the degree of overlapping is different according to the degree of head rotation. The investigators postulated that if the degree of overlapping is different according to the degree of head rotation after LMA insertion, the investigators can find the angle of head rotation for least overlapping and reduce the risk of CCA puncture. Therefore, the investigators tried (1) to find the optimal head rotation angle appropriate for puncturing IJV after LMA placement, and (2) to find suitable landmark adequate for IJV cannulation after LMA placement.


Condition Intervention
General Anesthesia With Laryngeal Mask Airway (LMA)
Other: Head rotation

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective
Official Title: Optimal Head Rotation and External Landmark for Internal Jugular Vein Cannulation After Placement of Proseal Laryngeal Mask Airway

Further study details as provided by Samsung Medical Center:

Primary Outcome Measures:
  • overlap index [ Time Frame: at 5 min after anesthesia induction ] [ Designated as safety issue: No ]
    The overlap index was derived from the ratio of the overlapping length of the IJV to the horizontal diameter of the CCA measured on the ultrasonographic image. The formula of calculation is as follows: overlap index = [overlap length (mm)/ CCA diameter (mm)] X 100(%), the measurements were repeated according to the degree of head rotation (neutral, 15 degree, 30 degree, 45 degree)


Secondary Outcome Measures:
  • The success of simulated internal jugular vein puncture (central landmark) [ Time Frame: at 5 min after anesthesia induction ] [ Designated as safety issue: No ]
    The success of internal jugular vein puncture guided by the central landmark simulated on the ultrasonographic images, the measurements were repeated according to the degree of head rotation (neutral, 15 degree, 30 degree, 45 degree)

  • The success of simulated internal jugular vein puncture (external jugular vein landmark) [ Time Frame: at 5 min after anesthesia induction ] [ Designated as safety issue: No ]
    The success of internal jugular vein puncture as guided by 1.5 cm or 2.5 cm medial to the external jugular vein simulated on the ultrasonographic images, the measurements were repeated according to the degree of head rotation (neutral, 15 degrees, 30 degrees, 45 degrees)


Enrollment: 100
Study Start Date: July 2011
Study Completion Date: December 2012
Primary Completion Date: December 2012 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
LMA group
patients undergoing general anesthesia with LMA insertion
Other: Head rotation
Repeated ultrasonographic examination according to the degree of head rotation (examination of overlap index of internal jugular vein and common carotid artery, and accuracy of external landmark of jugular cannulation)
E-tube group
patients undergoing general anesthesia with e-tube
Other: Head rotation
Repeated ultrasonographic examination according to the degree of head rotation (examination of overlap index of internal jugular vein and common carotid artery, and accuracy of external landmark of jugular cannulation)

Detailed Description:

Recently, laryngeal mask airway (LMA) placements are frequently performed for general anesthesia. The investigators occasionally encounter a clinical situation to perform internal jugular vein (IJV) cannulation after LMA insertion, especially for difficult airway in subjects undergoing major surgery. However, anatomic relations of IJV and common carotid artery (CCA) in patient with LMA placement have been reported to be different from those in patients with endotracheal tube. The degree of overlapping of the right IJV and CCA after LMA placement was greater than before LMA placement. Furthermore, there are many cases of complete overlapping right IJV and CCA after LMA placement. Therefore, the risk of puncturing CCA increases when the investigators try to cannulate IJV after LMA placement. Furthermore, the central landmark commonly used for IJV cannulation was proved to show low success rate after LMA placement in previous report. Previous study recommended the lower puncture point near that area where the clavicular head of the sternocleidomastoid muscle attaches to the clavicle, because CCA was not observed in the vicinity of the IJV after LMA insertion. Even though they performed test puncture at the lower puncture point in 20 patients and found no complications, the lower puncture point is not the usual site for IJV cannulation for most anesthesiologists. It is known that increased head rotation is associated with high probability of CCA contact. The investigators carefully examined the anatomic relations of IJV and CCA after LMA insertion with ultrasonography, and found that the degree of overlapping is different according to the degree of head rotation. The investigators postulated that if the degree of overlapping is different according to the degree of head rotation after LMA insertion, the investigators can find the angle of head rotation for least overlapping and reduce the risk of CCA puncture. Therefore, the investigators tried (1) to find the optimal head rotation angle appropriate for puncturing IJV after LMA placement, and (2) to find suitable landmark adequate for IJV cannulation after LMA placement.

  Eligibility

Ages Eligible for Study:   20 Years to 70 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population

patients undergoing general anesthesia with laryngeal mask airway insertion

Criteria

Inclusion Criteria:

  • patients undergoing general anesthesia with laryngeal mask airway insertion

Exclusion Criteria:

  • patients undergoing emergency surgery
  • patients with anatomical problem of airway
  • anticipated difficult airway
  • patients with hemodynamic unstability
  • patients with severe cardiopulmonary disease
  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT01407302

Locations
Korea, Republic of
Samsung Medical Center
Seoul, Korea, Republic of, 135-710
Sponsors and Collaborators
Samsung Medical Center
Investigators
Principal Investigator: Mi Sook Gwak, M.D.,Ph.D. Samsung Medical Center
  More Information

No publications provided

Responsible Party: Gwak Mi Sook, Professor, Samsung Medical Center
ClinicalTrials.gov Identifier: NCT01407302     History of Changes
Other Study ID Numbers: 2011-04-024
Study First Received: July 21, 2011
Last Updated: December 24, 2013
Health Authority: South Korea: Institutional Review Board

Keywords provided by Samsung Medical Center:
Laryngeal mask airway
internal jugular vein cannulation

ClinicalTrials.gov processed this record on October 16, 2014