How could the error have been avoided? What could have caused the change in collateral circulation? What could have caused the weak pulse and what should the phlebotomist do about it? What error did...

How could the error have been avoided? What could have caused the change in collateral circulation? What could have caused the weak pulse and what should the phlebotomist do about it? What error did the phlebotomist make that contributed to hematoma formation? What would cause the specimen to be bluish red? How can the phlebotomist be certain that the specimen is arterial blood?