Venous access is necessary for the treatment of many conditions and diseases. Sometimes, either due to patient factors or prior venous access, obtaining venous access is challenging. This is called venous occlusion.
Chronic venous access causing venous occlusion can lead to symptoms of post-thrombotic syndrome or venous insufficiency. Common signs include dilated superficial veins, swelling, recurrent clots, easy fatigue and weakness.
Venous access problems are diagnosed upon attempts at peripheral IV placement or central venous line placement. It can also be diagnosed with imaging (Ultrasound, CT or MRI), especially when the problem needs to be mapped.
Difficult venous access requires that those attempting venous access be skilled in advanced techniques, including ultrasound guidance. If the cause of difficult venous access is from prior venous access and involves the large, central veins, recanalization can be attempted to normalize flow and reduce symptoms.
A CT scan is a set of pictures that show the inside of any part of the body.
A MRI is a test that uses a large magnet, radio waves, and a computer to take pictures of the inside of the body.
An ultrasound is a test that uses sound waves to show pictures of the inside of the body.