You are a home health nurse providing care to a patient with myasthenia gravis. Today you plan on helping the patient with bathing and exercising. When would be the best time to visit the patient to help with these tasks?

Choice A reason: This is incorrect. The foot remaining in the same position prior to stroking the sole of the foot is a normal response in adults. It indicates that the spinal cord and the brain are intact and functioning properly.

Choice B reason: This is correct. Great toe bending upward, and smaller toes fanning outward is an abnormal response in adults. It indicates a positive Babinski reflex, which is a sign of damage to the cerebral cortex or the pyramidal tract. The cerebral cortex is the outer layer of the brain that controls higher functions such as thinking, reasoning, and movement. The pyramidal tract is a bundle of nerve fibers that connects the cerebral cortex to the spinal cord and controls voluntary movements.

Choice C reason: This is incorrect. Great toe bending downward is also a normal response in adults. It indicates that the spinal cord and the brain are intact and functioning properly.

Choice D reason: This is incorrect. The opposite foot assuming the same position as the foot being stroked is not related to the Babinski reflex. It is a phenomenon called mirror movement, which may occur in some people due to genetic or developmental factors. It does not indicate any abnormality in the cerebral cortex.

Choice A reason: Patient should increase daily iron supplements, is a statement that indicates a need for additional teaching. Iron supplements are not recommended for patients with beta-thalassemia, because they already have high levels of iron in their blood due to the frequent blood transfusions. Excess iron can cause damage to the liver, heart, and other organs. Therefore, the patient should avoid iron supplements and foods rich in iron, and take chelation therapy to remove the excess iron from the body.

Choice B reason: Signs and symptoms of infection, is a statement that does not indicate a need for additional teaching. Patients with beta-thalassemia are at risk of developing infections, due to the impaired immune system and the exposure to blood-borne pathogens. Therefore, the patient should be aware of the signs and symptoms of infection, such as fever, chills, sore throat, cough, or skin lesions, and seek medical attention promptly.

Choice C reason: Our child will need to have blood transfusions, is a statement that does not indicate a need for additional teaching. Blood transfusions are the main treatment for patients with beta-thalassemia, because they help to increase the level of hemoglobin and red blood cells, and prevent anemia and its complications. Therefore, the patient should receive regular blood transfusions, usually every two to four weeks, depending on the severity of the condition.

Choice D reason: Swimming is a good activity for our child, is a statement that does not indicate a need for additional teaching. Swimming is a good activity for patients with beta-thalassemia, because it helps to improve the cardiovascular fitness, muscle strength, and joint mobility, and reduce the stress and fatigue. Therefore, the patient should engage in moderate physical activities, such as swimming, walking, or cycling, as tolerated, and avoid strenuous or competitive sports that can cause injury or dehydration.