Final answer:
Pink-tinged frothy sputum in a client recovering from a myocardial infarction is indicative of pulmonary edema, a serious condition that requires immediate medical attention.
Step-by-step explanation:
A client recovering from a myocardial infarction who is demonstrating pink-tinged frothy sputum may be exhibiting signs of pulmonary edema. This condition is characterized by the accumulation of fluid in the lungs and is a possible complication after a heart attack. The presence of blood-tinged sputum is indicative of blood mixing with the alveolar fluid, which is often pink and frothy in nature. This situation requires immediate medical attention, as it can signify that the patient's heart is not effectively pumping, leading to fluid back-up in the lungs, which may compromise oxygenation and breathing.