In microvascular procedures, what is the risk of using excessive force with clamps?

• A. Increased speed with no downsides.
• B. Improved healing due to compression.
• C. No effect if vessel is small.
• D. Vessel injury, tissue damage, and compromised blood flow.

Answer: (D)

In microvascular procedures, the endothelium of tiny vessels is extremely delicate, so clamps must be applied with precision and gentleness. Excessive force crushes the vessel, tears the intima, and can injure surrounding tissue. This kind of trauma promotes platelet aggregation and thrombus formation, which can occlude the vessel after the clamp is released and compromise blood flow to the tissue. The resulting vessel injury and tissue damage undermine perfusion and healing, which is why careful, atraumatic clamping is essential. There is no speed advantage or “one-size-fits-all” benefit to using more force; in fact, small vessels are particularly vulnerable and can be more easily damaged by excessive pressure.