Vascular access for extracorporeal therapy in the rabbit

Area of Science:

• Veterinary Medicine
• Surgical Techniques
• Extracorporeal Therapy

Background:

• Establishing reliable short-term vascular access in animal models is crucial for research.
• Previous methods may have limitations in duration or flow rates.
• Extracorporeal therapies require consistent and adequate blood flow.

Purpose of the Study:

• To describe a novel technique for creating a short-term externalized carotid-jugular arteriovenous shunt in rabbits.
• To evaluate the efficacy and duration of blood access provided by this shunt.
• To demonstrate the utility of this technique for extracorporeal therapy in rabbit disease models.

Main Methods:

• Construction of an externalized carotid-jugular arteriovenous shunt using silicone rubber cannulae and teflon vessel tips.
• Surgical insertion of the shunt into rabbit carotid artery and jugular vein.
• Assessment of blood flow rates and duration of patency.
• Evaluation of methods to maintain blood flow after shunt clotting.

Main Results:

• The insertion procedure was completed within 1 hour.
• Extracorporeal blood flows exceeding 10 ml/min were achieved.
• The shunt provided reliable blood access for up to 7 days.
• Blood flow could be re-established after clotting by inserting smaller catheters.

Conclusions:

• This technique provides a reliable method for short-term vascular access in rabbits.
• The described arteriovenous shunt is suitable for various extracorporeal therapies.
• The method is effective in rabbit disease models, facilitating research.