Your access is the thing that determines how well your years on dialysis go. It is also the thing patients hear about last.
The hierarchy is not close
An arteriovenous fistula — your own artery joined to your own vein. Lowest infection rate, lowest thrombosis rate, longest survival. It requires three to six months to mature before it can be used.
A graft — a synthetic tube between artery and vein. Usable in weeks. Clots and infects more often. Shorter lifespan.
A tunneled catheter — a line in a central vein. Works immediately, and is the worst option by a wide margin. Infection rates are several times higher. Central veins stenose and occlude, foreclosing future access on that side.
The entire argument for planning early reduces to this: a fistula placed six months before you need it means you never require a catheter.
What we assess
Whether the access is working. Bruit and thrill on examination. A fistula that has lost its thrill has clotted, and that is an emergency — hours matter.
Whether it is maturing. Six weeks after creation we look for adequate diameter, adequate flow, and sufficient depth beneath the skin to cannulate. Roughly a third of fistulas never mature. Catching that early means salvaging it or moving to plan B rather than discovering the problem when someone tries to needle it.
Whether it is failing. Difficulty cannulating. Prolonged bleeding after needle removal. Rising venous pressures during dialysis. Falling delivered dose. Arm swelling, which points to central venous stenosis. A pulsatile access with no thrill.
Whether it is stealing. A hand that is cold, pale, painful, or weak means the access is diverting blood from the distal circulation. This can progress to tissue loss and needs urgent attention.
Whether it is infected. Redness, tenderness, drainage, fever.
Whether the vessels support a new one. Vein mapping by ultrasound before any access is created.
| Access type | What it is | Best for |
|---|---|---|
| Fistula | Your own vein and artery joined surgically | The preferred long-term access — lowest infection risk |
| Graft | A soft tube connecting an artery and vein | When veins are too small for a fistula |
| Catheter | A tube in a large vein | Short-term or urgent use only |
What Remix Medical does, and does not do
We evaluate. We examine the access, order and interpret duplex ultrasound and vein mapping, monitor maturation, recognize dysfunction early, and determine which access strategy fits your anatomy and your timeline.
We do not place accesses and we do not perform interventions. Fistula and graft creation is done by a vascular surgeon. Angioplasty, stenting, and declotting are done by an interventional radiologist or vascular surgeon. We coordinate those referrals and we manage everything around them.
That division matters, and stating it plainly is more useful than implying otherwise.
Protecting the arm
Once an arm is designated for access, protect it. No blood draws. No intravenous lines. No blood pressure cuffs.
This should be told to every patient with an eGFR under 30, well before dialysis is on the horizon. It usually is not, and by the time it is, both arms have been used for years.
Timing, again
A fistula needs three to six months. Vein mapping and surgical referral precede that. Maturation surveillance follows it.
A patient who begins at an eGFR of 20 has a mature fistula waiting. A patient who arrives in an emergency room at an eGFR of 6 gets a catheter in the neck, and carries its risks for months while a fistula is built.
The difference between those two patients is a conversation held early.