A Vascular Access Surgeon or Diagnostic/Interventional Radiologist?

By TinaMarie Cerreta

Why A Vascular Access Surgeon or Diagnostic/Interventional Radiologist?


First Let's Define Fistulas and Grafts:

  • AV Fistula (Arteriovenous Fistula): A surgeon directly connects an artery (carries blood from the heart) to a vein (carries blood to the heart), usually in the arm. This redirection forces high-pressure arterial blood into the vein, causing the vein to thicken and enlarge over several weeks so it can handle repeated needle sticks for dialysis. [1, 2]
  • AV Graft (Arteriovenous Graft): If a patient's natural veins are too small or weak to create a fistula, the surgeon uses a soft, synthetic tube (made of a material called PTFE) to connect the artery to the vein. Dialysis needles are then placed directly into this artificial tube. [1, 2, 3]
**Routine maintenance procedures (like an angiogram, balloon angioplasty, or stenting) are necessary to keep a dialysis access site functioning. [1, 2]

Why This Happens:
Dialysis requires an access point—either an AV fistula (connecting an artery to a vein) or an AV graft (a synthetic tube). Because veins are not naturally built to handle the high-volume, high-pressure blood flow of an artery, they can become irritated. [1, 2, 3]
Scar Tissue (Stenosis): This irritation causes a buildup of scar tissue (neointimal hyperplasia) inside the vessel wall.
Slower Flow / Blockage: This buildup narrows the vein, slowing down blood flow and preventing the access from filtering the blood effectively. [1, 2, 3, 4]
Thrombosis (Clotting): The access site can become blocked by blood clots, requiring immediate removal so the patient can continue their dialysis treatments.
Infections: Bacteria can enter the site, particularly in synthetic grafts. [1, 2, 3]

The maintenance procedure and how the doctor fixes them:
If a scan or your dialysis nurse notices a drop in flow (or you notice swelling in the access arm), they'll suggest you make an appointment with a Vascular Access Surgeon or a Diagnostic/Interventional Radiologist[1, 2, 3] They typically repairs tissues through outpatient procedures:

  • Angioplasty and Stenting: The doctor/surgeon inserts a tiny balloon into the access site and inflates it to push aside clots or widen narrowed areas. A small wire mesh tube (stent) might be left inside to keep the vessel open. [1]
  • Thrombolysis: Using special medications or tiny tools to dissolve and break up blood clots. [1]
  • Revision Surgery: If a narrowing is severe or an infection is present, the doctor may need to open the site and surgically replace or reconstruct the troubled section of the fistula or graft. [1]

Reliable Resources:
My impressions on this topic:
I see my Diagnostic/Interventional Radiologist every two months, or even sooner sometimes. She does whatever it takes to keep my fistula clean and working well. It's a necessary procedure, like maintenance, to keep my dialysis access site functioning properly. (And I did nothing wrong to cause it. Its a remnant of the actual dialysis procedure and expected wear and tear of the vein and artery in the fistula or graft.)
I get a little neurotic about my access site. I worry when the pressure in the vein or artery gets too high. Also, when they take the needles out after a treatment and it takes a bit longer to stop the bleeding, or I bleed through the bandages. That's when I reschedule my appointment with the doctor.

Before I go, I wanted to share something cool my doctor does after a procedure or surgery. She gives her patients turkey sandwiches and juice when they get out of the OR. I don't know if other surgeons do this post-op, but mine does! I looked it up online, and here's what I found: **Doctors give turkey sandwiches and juice after a procedure to safely break the pre-surgery fast, rehydrate the body, and restore blood sugar levels. This combo also tests your digestive system's tolerance after anesthesia while giving you the essential protein needed for initial wound healing and recovery. [1, 2, 3] The classic post-op turkey sandwich and juice are specifically chosen for a few important reasons, like [1, 2] restoring blood sugar, testing digestive tolerance, providing lean protein, being safe for dietary restrictions, and hydration.That's so cool! I would have never guessed that to be true. Let me tell you, hers are so good that I eat that "bad boy" no matter what time I get out of there! 🤣 I don't know where she gets them, but they are so delicious.

So, there you have it. The ins and outs of it all. I hope your weekend passes without incident and blossoms brightly. This is all I'm going to say about this post. Until we speak again.
Tina
Here is my quote for you:
"Some days are heavy, but my spirit is stronger. My access is my daily proof that I am equipped to handle the journey ahead."
My links are in the sidebar
(Please, please, please share these links with everyone!)

Thank you for reading my posts.




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