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Investigation of Endothelium in Saphenous Vein Grafts

This study has been completed.
Maquet Cardiovascular
Information provided by (Responsible Party):
Vinod Thourani, Emory University Identifier:
First received: November 2, 2011
Last updated: September 30, 2013
Last verified: September 2013
This is a single center prospective study of 30 patients undergoing elective heart bypass surgery (CABG) with at least two vein grafts from the leg (SVG). The purpose of this ex vivo study is to evaluate the function of vein grafts from small tissue samples treated with a pressure syringe and a non-pressure syringe. Syringes are routinely used to flush out the veins in preparation of bypass grafting. It is unknown if different levels of pressure in the syringe affect the vein or damage the vein. Small sections of tissue samples which are normally discarded will be obtained immediately after retrieval from the leg and before grafting to the heart. Tissue samples will be taken to the laboratory for study. There are no clinical endpoints in this study, however, clinical information will be obtained from the Society of Thoracic Surgeons database and will include demographics, risk factors, and perioperative outcomes.

Condition Intervention
Endothelial Function of Saphenous Vein Grafts
Other: Use of Maquet Vasoshield Pressure-limiting syringe on SVG
Other: Use of non-regulated syringe on SVG

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Basic Science
Official Title: A Prospective Trial to Investigate Endothelial Dysfunction in Saphenous Vein Grafts Subjected to the Maquet Vasoshield Pressure Limiting Syringe Versus Non-Regulated Vessel Dilation in Patients Undergoing Coronary Artery Bypass Grafting

Further study details as provided by Emory University:

Primary Outcome Measures:
  • SVG vascular contractility [ Time Frame: Day of surgery ]

Secondary Outcome Measures:
  • Nitric oxide metabolite levels [ Time Frame: Day of surgery ]
  • Major adverse cardiac events [ Time Frame: 6 months and 1 year ]

Enrollment: 30
Study Start Date: November 2011
Study Completion Date: June 2012
Primary Completion Date: June 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Maquet Vasoshield Arm
Pressure limiting syringe
Other: Use of Maquet Vasoshield Pressure-limiting syringe on SVG
Use of Maquet Vasoshield Pressure-limiting syringe on SVG
Other Name: Maquet device
Active Comparator: Non-regulated Arm
standard non-regulated syringe
Other: Use of non-regulated syringe on SVG
Use of non-regulated syringe on SVG
Other Name: standard syringe


Ages Eligible for Study:   21 Years to 90 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • patients undergoing elective coronary artery bypass graft surgery requiring at least 2 saphenous vein grafts

Exclusion Criteria:

  • patients undergoing any concomitant surgical procedures
  Contacts and Locations
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Please refer to this study by its identifier: NCT01510821

United States, Georgia
Cardiothoracic Surgery Research Laboratory
Atlanta, Georgia, United States, 30308
Emory University Hospital Midtown
Atlanta, Georgia, United States, 30308
Sponsors and Collaborators
Emory University
Maquet Cardiovascular
Principal Investigator: Vinod Thourani, MD Emory University
  More Information

Responsible Party: Vinod Thourani, Associate Professor of Surgery, Emory University Identifier: NCT01510821     History of Changes
Other Study ID Numbers: IRB00049331
Study First Received: November 2, 2011
Last Updated: September 30, 2013

Keywords provided by Emory University:
endoscopic vein harvest
saphenous vein graft
endothelial function processed this record on May 25, 2017