Historical spinal vascular shunt classification schemes
| Authors | Year | Classification Summary |
|---|---|---|
| Di Chiro et al5 | 1971 | Type I: Single coiled vessel (AVF)Type II: Glomus type (AVM)Type III: Juvenile (AVM) |
| Heros et al6 | 1986 | Type IV: Direct AVF (IPAVF) involving the intrinsic arterial supply of the cord |
| Gueguen et al7 | 1987 | 3 Types of classification of IPAVF (type IV) I) Single arterial feeder, small AVF II) Multiple feeders, medium AVF III) Multiple feeders, giant AVF |
| Spetzler et al8 | 2002 | AVF types (and subtypes):ExtraduralIntradural (dorsal or ventral; and single (A) or multiple (B) feeders)AVM types (and subtypes):Extradural-intraduralIntradural (intramedullary, intramedullary-extramedullary, or conus medullaris) |
| Zozulya et al9 | 2006 | Type I: IntramedullaryType II: Intradural or perimedullaryType III: DuralType IV: EpiduralType V: IntravertebralType VI: Combined |
| Takai10 | 2017 | Proposed the addition of Type V: Extradural AVF, with subtypes Va/Vb: with/without intradural venous drainage |