Final answer:
Not all pressure ulcers are avoidable because some patients are at high risk despite preventive measures. They are caused by prolonged pressure that reduces blood flow, not by dry skin, and can be reduced by eliminating pressure points and using proper care techniques.
Step-by-step explanation:
Not all pressure ulcers are avoidable. Despite best practices and diligent care, some patients may develop pressure ulcers due to various risk factors such as immobility, poor nutrition, underlying health conditions, or the inability to feel pain. While pressure ulcers can be prevented by eliminating pressure points, not all situations allow for complete prevention.
Techniques such as regular repositioning, using support surfaces, and maintaining good nutrition and skin care can significantly reduce the risk. However, it's important to note that pressure ulcers can result from deep massages if excessive force is applied over a bony area. Contrary to some beliefs, they are not caused by dry skin but by prolonged pressure that reduces blood flow to the tissue.