Final answer:
Kocker / Ochsner Forceps are used in medicine for grasping heavy tissues, such as bone or fascia, requiring a secure grip. They are critical surgical instruments that relate to the principle of hand grip firmness for effective handling.
Step-by-step explanation:
The Kocker / Ochsner Forceps are medical instruments used for holding and grasping during surgical procedures. Specifically, these forceps are designed for grasping heavy tissue such as bone or fascia, where a strong and secure grip is required. When discussing the hand during gripping, as in figure 8.10, tightly gripping an object, as seen in comparison between (a) loosely held and (b) firmly gripped, will pull the fourth and fifth metacarpal bones anteriorly, increasing contact on the medial side of the hand to improve the firmness of the grip. This concept can be applied to the use of forceps, as the grip on the instrument needs to be secure to handle heavy tissues effectively.
Comparatively, there are other medical instruments designed for different functionalities. For example, some instruments are used to penetrate solid tissues and suck up liquid food, much like how Cicadas, aphids, and sucking lice feed. Meanwhile, other instruments may be used to sponge and absorb liquids at the surgical site. Each tool has a specific purpose, which is critical to the success of a surgical procedure.