Final answer:
An enterostomal nurse demonstrating how to assist with ostomy supplies and manipulate equipment is using a psychomotor skill, which involves motor skills and physical movement.
Step-by-step explanation:
When an enterostomal nurse shows a client's significant other how to assist with the supplies for the ostomy and how to manipulate the ostomy equipment, the nurse is utilizing a psychomotor skill. This type of nursing skill involves the application of motor skills and coordination to perform tasks that require physical movement and precision. By teaching someone how to manage ostomy equipment, including cutting the opening in the skin barrier to fit properly over the stoma and correctly attaching the skin barrier and pouch, the nurse is focusing on actions that involve physical dexterity and the manipulation of physical objects, which are all essential components of psychomotor skills.