<unk> s A<unk>  (also called a<unk> ic clamp, arterial forceps, or pean after Jules-Émile Péan) is a surgical tool used in many surgical procedures to control bleeding. For this reason, it is common in the initial phases of surgery for the initial incision to be lined with<unk> s which close blood vessels awaiting ligation.<unk> s belong to a group of instruments that pivot (similar to scissors, and including needle holders, tissue holders and various clamps) where the structure of the tip determines its function. The<unk>  has handles that can be held in place by their locking mechanism. The locking mechanism is typically a series of interlocking teeth, a few on each handle, that allow the user to adjust the clamping force of the pliers. When locked together, the force between the tips is approximately 40 N (9 lbf).
Hemostat
Coagulase
Transfer factor
Serpin
Plasminogen 
Thrombin
Wobenzym
Streptokinase