Aging Of Blunt Force Injuries

 

                                                                    Mechanical Injuries 

                                              Blunt Force Injuries = Abrasion/Contusion/Laceration

Aging Of Blunt Force Injuries 

Abrasion 

Abrasion Day 4 - 5 

Dark Brown To Brownish Black

Contusion 

Aging Of Contusion

Laceration 

(approximate timelines – can vary with health, site, cause, environment)

• Within minutes: Hemorrhage, tissue disruption, clot formation.

• 30 min – 1 hour: Margins show margination of neutrophils.

• 6–12 hours: Polymorphonuclear leukocyte infiltration at wound edges.

• 12–24 hours: Increased neutrophil infiltration, edema, vascular dilatation.

• 1–3 days: Macrophages appear (phagocytosis of debris). Early fibroblast proliferation.

• 3–5 days: Fibroblasts and capillary buds form granulation tissue.

• 5–7 days: Collagen deposition starts.

• 1–2 weeks: Dense granulation tissue, collagen bridges wound.

Snapshot