Hemostasis in blood vessels after ligation

Area of Science:

• Vascular Surgery
• Surgical Hemostasis
• Biomaterials Science

Background:

• Achieving effective hemostasis is critical in surgical procedures involving blood vessels.
• The duration of vessel occlusion required for reliable hemostasis is not definitively established.
• Stainless steel clips are commonly used for ligation, but their efficacy over time requires further study.

Purpose of the Study:

• To determine the minimum time required for secure hemostasis after ligation of medium-sized blood vessels (1.0-3.5 mm diameter).
• To evaluate the impact of varying degrees of trauma on hemostasis following ligation.
• To assess the reliability of stainless steel clips for achieving long-term hemostasis.

Main Methods:

• Canine limb blood vessels (1.0-3.5 mm diameter) were ligated using stainless steel clips.
• Clips were removed at intervals of 48, 60, 72, 84, and 96 hours post-ligation.
• Hemostasis was evaluated through sequential application of trauma (stroking) and observation periods.

Main Results:

• All ligated blood vessels achieved complete hemostasis after 96 hours of secure ligation, even when subjected to trauma.
• Vessels ligated for shorter durations (48-84 hours) showed varying degrees of bleeding upon trauma application.
• Secure ligation for a minimum of 96 hours is essential for reliable hemostasis.

Conclusions:

• A minimum of 96 hours of secure ligation is necessary to ensure hemostasis in canine limb blood vessels of 1.0-3.5 mm diameter.
• Factors affecting blood clotting, such as disease or medications, may require extended ligation periods.
• Surgical ligation devices must ensure secure closure for at least 96 hours to guarantee hemostasis.