A “top-down-approach” to insert catheters into the circulation of fetal sheep using ultrasound B-scan

Objective The objective of the study was the catheterization of vessels in fetal sheep under ultrasound control. Study design A catheter with guiding wire was introduced into the external jugular vein or carotid artery and advanced caudally. Results The aorta and umbilical vein could be accessed. Conclusion Major segments of the circulation are accessible from the neck for chronic instrumentation.