In the collection of blood samples from rodents through the saphenous method, what equipment is typically used?

The saphenous method for collecting blood samples from rodents involves a technique where a small volume of blood is drawn from the lateral saphenous vein, usually located on the hind leg of the animal. This method typically requires the use of equipment that allows for the effective collection of small blood volumes without causing excessive stress or harm to the animal.

Using a capillary tube is most appropriate in this scenario because it is designed for collecting small blood samples, often in the range of microliters. The narrow diameter of the capillary tube allows for easy access to small veins and minimizes trauma to the vessel. Furthermore, capillary tubes can be filled quickly and effectively, making them ideal for the quick and precise collection necessary in a laboratory setting, particularly with small animals like rodents.

While other equipment such as syringes, test tubes, and vacutainers are commonly used for blood collection in larger animals or for larger blood volumes, they are not optimal for the delicate and small-scale blood collection required in the saphenous method for rodents. Syringes can introduce too much volume and may lead to a greater stress response in the animal, while test tubes and vacutainers are intended for collecting larger blood samples and may not be practical for