Abdominal vena cava

This is a suitable method to obtain a single, large, good quality blood sample when the marmoset is under terminal anaesthesia or euthanised, as the body cavity must be opened to expose the blood vessel.

A laparotomy is performed and viscera are moved to one side to identify the abdominal vena cava. Surrounding connective tissue and fat are then removed to expose and isolate the vessel. Application of finger pressure to the blood vessel can help dilate the vessel. Depending on the size of the marmoset, up to 10 ml of blood can be collected. Care should be taken to withdraw the blood slowly to prevent the vessel collapsing.

Summary

Number of samples One
Sample volume Up to 10 ml
Equipment 19G needle
Staff resource Two people are required: one to take the blood sample and another to perform the anaesthesia (unless carried out on a euthanised animal).

Resources and references

All blood sampling techniques in the marmoset

Click here for information on femoral vein sampling in the marmoset