Estimation of Internal Jugular Vein Central Venous Pressure (CVP) by Ultrasound

Validity and Reliability of Non-invasive Estimation of Central Venous Pressure by Measurement of Internal Jugular Size Using 2-dimensional Ultrasound

To study the validity and reliability of estimation of the central venous pressure by measurement of internal jugular vein size using 2-dimensional ultrasound.

Objectives:

1. To study the validity and reliability of estimation of the central venous pressure by measurement of internal jugular vein size using 2-dimensional ultrasound.
2. To evaluate the correlation of internal jugular vein cross sectional area and central venous pressure.

Methods:

1. The study design is prospective observational study.
2. We will include all patients scheduled for cardiac surgery in Siriraj Hospital and record both internal jugular size using 2-dimensional ultrasound just before central venous catheter insertion. The central venous pressure will be recorded and the ultrasound picture will be measured.
3. The data will be analyzed.

Inclusion Criteria:

• patients scheduled for cardiac surgery
• need central venous catheterization intraoperatively
• elective surgery
• age > 18

Exclusion Criteria:

• neck pathology
• history of internal jugular or SVC thrombosis
• limited neck mobility
• severe valvular lesion
• decompensated heart failure