Injuries by d & rsquo projectiles, firearms

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I- Introduction :

Wounds from projectiles & rsquo; firearms based on a simple principle :

"Shot" and its consequences Lesions vary according to various parameters of shooting

Definition : lacerations,that present, in a general way ,very specific characters ,can help, by review , to give justice information of the utmost importance .

II- Overview :

wounding agents : war ,Ies fragments predominate, civil ( 24000 shot dead in a year U.S.A.).

1- Splinters :

  • Primary projectiles : from d & rsquo; an explosion(bomb , grenade ;roquette )
  • The secondary projectiles:projected by the breath of & rsquo; explosion(miscellaneous debris, terre….)

2- The balls :

  • The ball is a constituent of a cartridge.
  • caliber bullet : existing diameter at the bottom of the barrel rifling

– in mm in Europe
– 1 / 100th or 1 / 1000th of an inch in Anglo-Saxon countries.

III- Determining the trajectory of firing :

1- Review of clothing :

  • Orientations of the fibers of the garment

2- Aspects skin openings :

A- Port & rsquo; entry :

  • The collar features erosive,whatever the distance of draws,l & rsquo; & rsquo port; entry;or rather,Ion is DIMAIO.Ia collar d & rsquo; abrasion since it is not the skin edges payroll that are erosive but projecile: this erosive flange corresponds to the & rsquo; flattened and lapped epidermis surrounding the & rsquo; d & rsquo port; entrée.cette erosive flange may vary depending on the recency or not the wound, depending on the size of the & rsquo; & rsquo and weapon, the bullet penetration angle,ion is the location of the penetration , according posture that & rsquo; was the topic when he received the shoots.
  • In general the openings & rsquo; entry are circular or oval according to & rsquo; angle of & rsquo; pa weapon relative to the skin
L & rsquo; d & rsquo port; entry

Over the & rsquo; obliquity of draws increases, plus & rsquo; & rsquo port; input s & rsquo; lengthens

The collar d & rsquo; wiping

Slag forming the collar d & rsquo; wiping are arranged in the form of increasing the portion of skin and abraded
s & rsquo; other side under the deep surface where the ball will be wiped

The collar d & rsquo; increasing erosion / End flap
  • tattoo: comes from unburned powder grains but broken, s & rsquo; there interposition clothes :
  • at an average distance total absence of soot , Tattoo and powder around & rsquo; d & rsquo port; entry.
  • very short present on the surface of the fabric.
  • After touching at present also on the deep side
  • After touching at present supported in whole or in under clothing.
Injury Point blank / Injury toe touching / Injury remote Bout / Tattoo Tip touching

B- Outlet port :

  • These outlets are not required if the projectile n & rsquo; more was sufficient kinetic energy to break.
  • They look identical, whatever the shooting distance.
  • Typically they are larger and more irregular than the openings & rsquo; entries ,exceptions would have no erosive collar.

C- comparison (port & rsquo; input / output port) :

Inlet Outlet port
Round or oval Starlit -berges everted
Collar essyage without
Collar erosion without
Burn Without
Tailings deposit (tattoo) without

3- Route intracorporeal projectiles :

– dissection plane by plane ride projectilaire
– orifices aponeuroses and capsules
– cranial orifices
– contribution of radiology

 

* atypical trajectories :

– Taking as an example :internal ricochets
– they present 20 at 25 percent of cases.
– are involved ; non-jacketed bullets and small arms

IV- lesional profile :

  • contacting the target product ;destabilization of the ball goes through and increases the length of that passageway & rsquo; will form permanent cavity(I CRUSH).
  • this destabilization is originally d & rsquo; tissue stretching by abrupt discharge and short fabrics whose mechanism varies projectiles: the temporary cavity(or STRETCHING).

V- Diagnostic :

Lifting of body :

  • consider the place of state
  • find the weapon
  • observe the bloodstains
  • look for bullets
  • examine clothing

external examination :

  • description des phénomènes cadavériques
  • seek outlet
  • the skin palpation
  • look for signs of violence
  • Description of the inlet port
  • consideration of natural orifices

Radio corpse : allows & rsquo; orient & rsquo; autopsy

Autopsy :

  • Identification projectiles
  • firing residue revelation

WE- Forensic Aspects :

1- Accident :

it is often manifested when the firing direction was vertical

2- suicide :

The shot is fired after touching or very short distance and in places considered elective:the temple,l & rsquo; right ear with right-hander…

3- The crime :

Conclusion : In wounds gun, two key elements for rebuilding the forensic facts & rsquo; & rsquo port, input and lethal bullet.