Bloodstain Pattern Analysis Terminology

Note: At the 2009 IABPA meeting in Portland, OR, USA, the IABPA membership voted to adopt the SWGSTAIN recommended terminology.


Arterial Spurting Pattern
Bloodstain pattern(s) resulting from blood exiting the body under pressure from a breached artery.
Bloodstain Example - Arterial Spurting Pattern
Bloodstain Example - Arterial Spurting Pattern


This pattern was generated by drawing blood into a large-bore syringe and projecting it at the target.

The shape of arterial patterns can vary greatly but all deal with blood leaving the body under pressure. Patterns may have a series of large spurts as a result of larger wounds or they may be snake-like if the wound is smaller or restricted.

Alternate Terminology

Bevel & GardnerSpatter Family - Linear - (Arterial) Spurt
James, Kish & SuttonSpatter - Projected Mechanism - Arterial Spurt/Gush Spray
WonderArterial - (Breach)
SWGSTAINClosest to Projected Pattern - A bloodstain pattern resulting from the ejection of a volume of blood under pressure.