Related Experiment Video
Updated: Jul 28, 2026
Training a Sophisticated Microsurgical Technique: Interposition of External Jugular Vein Graft in the Common Carotid Artery in Rats
Published on: November 11, 2012
Use of cold cardioplegic solution for vein graft distention and preservation: a light and scanning electron
Insights
Limiting distending pressure is crucial for preserving saphenous vein endothelium during cardioplegic solution use. High pressure, not the solution type, causes endothelial damage in coronary artery bypass grafting.
Area of Science:
- Vascular Surgery
- Cardiothoracic Surgery
- Endothelial Biology
Background:
- The saphenous vein is commonly used for coronary artery bypass grafting.
- Preserving endothelial integrity is vital for graft patency.
- Cardioplegic solutions are used during cardiac surgery.
Purpose of the Study:
- To assess the impact of a cardioplegic solution on saphenous vein endothelium.
- To compare the effects of different distending solutions and pressures on vein morphology.
Main Methods:
- Saphenous vein segments from 5 patients were used.
- Segments were distended with saline, blood, or cardioplegic solution at controlled pressure (200 mm Hg) or uncontrolled pressure.
- Light and scanning electron microscopy were employed for examination.
Main Results:
- No significant morphological differences were observed between veins distended with saline, blood, or cardioplegic solution at 200 mm Hg.
- All controlled-pressure groups showed scattered endothelial disruption compared to controls.
- Veins distended without pressure control exhibited massive endothelial disruption.
Conclusions:
- Controlled distending pressure, not the specific solution, is the primary factor in preventing endothelial damage.
- Maintaining pressure below 200 mm Hg is essential for preserving saphenous vein endothelium during surgical procedures.
- These findings have implications for optimizing cardioplegic solution handling in cardiac surgery.
Abstract:
To evaluate the effect of a cardioplegic solution on the endothelium of the saphenous vein, portions of this vein were harvested from each of 5 patients undergoing coronary artery bypass operation. Each sample was divided into five segments. One segment was distended with heparinized saline solution, one with heparinized blood, and one with heparinized cardioplegic solution (25 mEq of potassium per liter). All of the distending solutions were kept at 10 degrees C, and pressure was carefully limited to 200 mm Hg. The fourth segment of vein was distended with heparinized saline solution but no effort was made to limit distending pressure, and the fifth segment was not distended. All samples were then examined with light and scanning electron microscopy. There were no great morphological differences in the endothelium of veins distended to 200 mm Hg with saline solution, blood, or cardioplegic solution. The morphology of these samples compared favorably with the control vein endothelium although scattered areas of endothelial disruption were present in every sample. Veins distended without pressure control showed massive endothelial disruption. The particular solution used to distend the sephenous veins is not as important as limiting the distending pressure.
