We have spent decades perfecting the upstream craft. Better stents. Better wires. Better balloons. Micrometer surgery. Then we hand the patient off, and the work disappears. On Life of Flow, I sat down with Dr. Aaron Moore, a Jacksonville vascular surgeon who spent about 15 years in Navy and military medicine before going independent. He now does roughly two to three hundred fistulas and grafts a year. He kept watching repaired access come back damaged. He calls where it goes the dialysis unit black hole.
The Dialysis Unit Black Hole
We have spent decades building better stents, wires and balloons. Then we send fistulas back into the same chair that damaged them.
Watch The Episode
The Dialysis Unit Black Hole, LOF #131 of Life of Flow, hosted by Dr. Lucas Ferrer and Dr. Miguel Montero-Baker.
The Loop
Surgeon creates the fistula. Patient enters the unit. History is lost chair-side. Repeat punctures in the same area injure the access. We rescue it with more devices. It goes back into the same mechanism.
Create, lose, injure, repair, repeat.
Nobody Is Flying Blind On Purpose
The people doing the sticking are working against a clock. Often twelve to fifteen minutes from door to machine.
Clinical backgrounds vary. Training is heavily on the job. Aaron cites turnover as high as around 35% in some literature.
Without a map, the patient becomes the memory. And area puncture wins, because it is fast and familiar.
Rope ladder technique is proven. It is also under-implemented. That gap is not laziness, it is a missing tool.
What Changes With A Map
Aaron went from curious investor to VP of clinical affairs at the company building one. The product is called Veristra.
Sticks get photographed against a QR scale, marked, color-aged, and turned into a heat map. Hazard markers hold the things turnover erases: where it hurts, where it twists, where not to go.
One lesson from their pilot is worth sitting with. Recording cannulation points without showing history still leaves staff blind. The record has to be visible at the chair to matter.
The Bar Is Too Low
Somewhere along the way, roughly 50% annual fistula patency became acceptable.
We have been using the same cannulation paradigm since 1965.
The Takeaway
Stop predicting pseudoaneurysms. Prevent the pattern.
The honest test is not whether the technology is clever. It is whether intervention burden drops and patients spend less time in rescue mode.
If that does not fall, none of it counts.