Ideal Depth of Guide Wire for Central Catheterization

Study Overview
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Brief Summary
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prospective randomized double-blind controlled study

Detailed Description
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Total of 69 ASA (American Society of Anesthesiologist) physical status class I or II patients will be enrolled. Randomly assigned to three group according to the depth of guide-wire prior to tissue dilation during central catheterization via right internal jugular vein. (Group 1: 15 cm / Group 2: 17.5 cm / Group 3: 20 cm) Central catheterization will be performed by anesthesiologists who be blinded to this study protocol. An investigator will monitor and record whether any arrhythmia will occur. The incidence of occurrence of arrhythmia will be compared between three groups.

Official Title
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Ideal Depth of Guide Wire for Right Internal Jugular Vein During Central Line Insertion

Conditions
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Patient Safety During Central Venous Catheterization

Intervention / Treatment
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* Device: central venous catheterization


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patients receiving general anesthesia requiring central venous catheterization via right internal jugular vein. ASA (American Society of Anesthesiologist) physical status class I or II Exclusion Criteria: at the pre-anesthetic evaluation, history of any arrhythmia when monitoring before the induction of anesthesia in the operating room, newly arrhythmia is observed. abnormal electrolyte at the pre-anesthetic evaluation too difficult to access right internal jugular vein for central catheterization (too short neck, infection at the site of right internal jugular vein, ventriculoperitoneal shunt or chemo-port existence at the site of right internal jugular vein. too close site to operating field)

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
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: 15 cm<br>The depth of guide wire will be 15 cm from puncture site of skin prior to tissue dilation during central venous catheterization | Device: central venous catheterization<br>* 15 cm: The depth of guide wire prior to tissue dilation during central venous catheterization will be 15 cm. 17.5 cm: The depth of guide wire prior to tissue dilation during central venous catheterization will be 17.5 cm. 20 cm: The depth of guide wire prior to tissue dilation during central venous catheterization will be 20 cm.<br>|
| Experimental: 17.5 cm<br>The depth of guide wire will be 17.5 cm from puncture site of skin prior to tissue dilation during central venous catheterization | Device: central venous catheterization<br>* 15 cm: The depth of guide wire prior to tissue dilation during central venous catheterization will be 15 cm. 17.5 cm: The depth of guide wire prior to tissue dilation during central venous catheterization will be 17.5 cm. 20 cm: The depth of guide wire prior to tissue dilation during central venous catheterization will be 20 cm.<br>|
| Active Comparator: 20 cm<br>The depth of guide wire will be 20 cm from puncture site of skin prior to tissue dilation during central venous catheterization | Device: central venous catheterization<br>* 15 cm: The depth of guide wire prior to tissue dilation during central venous catheterization will be 15 cm. 17.5 cm: The depth of guide wire prior to tissue dilation during central venous catheterization will be 17.5 cm. 20 cm: The depth of guide wire prior to tissue dilation during central venous catheterization will be 20 cm.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of arrhythmia |  | during central venous catheterization |