Thrombus formation on catheters in new born lambs

Area of Science:

• Neonatal physiology
• Vascular surgery
• Medical device safety

Background:

• Catheter use in neonates is common but carries risks.
• Thrombus formation and embolism are significant complications.
• Understanding device-specific risks is crucial for patient safety.

Purpose of the Study:

• To evaluate thrombus formation around different catheter types in newborn lambs.
• To assess the incidence of renal infarction associated with various catheters.
• To compare outcomes based on insertion routes (femoral vs. umbilical vein).

Main Methods:

• Catheters were inserted into the aorta, inferior vena cava, and umbilical vein of newborn lambs.
• Femoral artery and vein cutdown techniques were employed.
• Thrombus burden and renal infarctions were quantified after six days.

Main Results:

• Umbilical vein catheter placement frequently resulted in liver looping, with few reaching the portal vein or vena cava.
• Significant differences in thrombus proportion and amount were observed between catheter types inserted via femoral vessels.
• Varying degrees of renal infarction were associated with different catheter types.

Conclusions:

• Catheter material and insertion route influence thrombogenicity and embolic risk in neonates.
• Careful selection of catheters and precise placement are critical to minimize complications.
• This study provides valuable data for optimizing neonatal catheterization practices.