Final answer:
Unstable patients are experiencing respiratory or cardiovascular signs/symptoms, indicating potential complications.
Step-by-step explanation:
Unstable patients are experiencing respiratory or cardiovascular signs/symptoms, indicating potential complications. These signs and symptoms can include shortness of breath, rapid breathing, chest pain, palpitations, low blood pressure, and irregular heart rhythms. It is important to recognize and address these symptoms promptly to prevent further deterioration and potential life-threatening complications.