Classification of pulmonary occlusive disease

1Major vessel clotYes
Readily visible on opening pulmonary arteries
20% of cases
2Only thickened intima can be seenYes
Endarterectomy plane initially raised in the main, lobar or segmental vessels
∼70% of cases
3Distal diseaseYes
Confined to segmental and subsegmental branches
∼10% of cases
4Intrinsic small-vessel diseaseNo
Secondary thrombi may occur from stasis
  • Data from [27].