[Mycroft Holmes]

Good morning. Help me here: "tronchars." Cutting tools?

Spelling problem; it's actually "trocar", from Froggish " a sharp-pointed instrument equipped with a cannula, used to puncture the wall of a body cavity and withdraw fluid." Very often used in embalming.

[M Kehoe]

Good morning.

The "n" had me confused. Thank you.

5.56mm

[lentulusgracchus]

Thank you with the spelling help, and the illustrations.

From Webster online:

Definition of TROCAR :
a sharp-pointed surgical instrument fitted with a cannula and used especially to insert the cannula into a body cavity as a drainage outlet

Variants of TROCAR
tro·car also tro·char \ˈtrō-ˌkär\
Origin of TROCAR
French trocart, alteration of trois-quart from trois three + carre edge

First Known Use: circa 1706

My only source was an autopsy report in my possession. Thanks for the correction.