Adequate Insertion Depth of Dilator During Central Venous Catheterization

Study Overview
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Brief Summary
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For safe central catheterization, clinicians must be aware of adequate dilator insertion depth not to directly dilate the venous wall. The purpose of the study is to find out adequate insertion depth of the dilator during central venous catheterization through the internal jugular vein with the aid of real-time ultrasonography.

Detailed Description
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This randomized controlled trial is to compare the distance between the skin puncture site and the outside of anterior wall of the internal jugular vein measured by real-time ultrasonography with the conventional method which is routinely used in common clinical practice.

Official Title
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Adequate Insertion Depth of Dilator During Central Venous Catheterization Through the Right Internal Jugular Vein

Conditions
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Central Venous Catheterization

Intervention / Treatment
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* Procedure: dilator depth


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: adult patients requiring central venous catheterization through the right internal jugular vein Exclusion Criteria: suspicion for infection of the right neck site

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: randomized controlled trial
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: measured distance<br>In the modified Seldinger's maneuver, after guide-wire insertion into the right internal jugular vein, we will measure the distance between the skin puncture site and the outside of anterior wall of the jugular vein. Next, we will insert the dilator on the guidewire by the measured length. | Procedure: dilator depth<br>* For soft tissue dilation just after guidewire insertion in central venous catheterization through the right internal jugular vein, investigators will measure the distance between the skin puncture site and outside of anterior wall of the vein with real-time ultrasonography in the measured depth group. Next, practitioner will insert the dilator by the measured length and continue to insert the central venous catheter. For the conventional group as a control group, practitioner will perform the central venous catheterization with a manner used routinely by the practitioner.<br>|
| No Intervention: conventional method<br>In the modified Seldinger's maneuver, after guide-wire insertion into the right internal jugular vein, we will insert the dilator on the guidewire as commonly used method of the practitioners. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| hematoma realted with the dilator | hematoma from the vascular wall puncture by the dilator | 1 Day (on the study day for each patient) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| distance between skin puncture site and the outside of the anterior wall of the internal jugular vein | distance between skin puncture site and the outside of the anterior wall of the internal jugular vein which will be measured by real-time ultrasonography | 1 Day (on the study day for each patient) |