You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A child was taken for CECT Chest and contrast was injected :  the child had swelling which gradually increased. There is numbness. There is a pain on passive extension of fingers. He is not allowing you to touch the arm. Pulse was present. What will you do? and explain in detail?
The child is having Compartment syndrome due to extravasation of contrast. This is a medical emergency and immedicate fasciotomy needs to be done to prevent tissue necrosis.