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 Commonest aery for cannulation is - and explain in detail?
Answer is 'a' i.e. Radial "Aerial puncture and cannulation is performed to measure the Pa02, PaCO2, Sa02 and pH to clarify the acid-base and electrolyte status. Any aery that can be compressed after puncture may be used (but not end-aeries); usually the radial (preferred), brachial, or femoral" - Lee 12/e