Which of the following is a result of sustained immobility and tissue damage?

Sustained immobility can lead to scar contracture, which is the correct answer. Scar contractures occur when the tissue heals abnormally after an injury, often due to immobilization or prolonged inactivity. This condition results in the shortening and tightening of the skin and underlying tissues, restricting movement in the affected area. The healing process can lead to the formation of fibrous tissue that is less flexible than normal skin, further compounding difficulties with mobility.

In contrast, while conditions like sarcomas (a type of cancer), muscle spasms, and electrolyte imbalances can be related to various health factors, they are not specifically direct results of sustained immobility and tissue damage. Sarcomas are tumors that arise from connective tissues, and their development involves abnormal cellular processes rather than just immobilization. Muscle spasms may occur due to a multitude of reasons including fatigue, dehydration, or electrolyte imbalances, but are not defined by scar formation or tissue healing issues. Electrolyte imbalances can arise from various physiological disruptions but are not directly linked to the results of immobility alone. Thus, scar contracture stands out as the specific result of immobilization and tissue damage, emphasizing the importance of mobilization in rehabilitation to prevent such complications.