Explain how carbon monoxide poisoning can give you a false reading on a pulse oximeter. a 28. If you do not have a spirometer, but you do have a watch or clock with a second hand, what test could you perform to measure breathing function? 29. If you have a blood pressure cuff and sphygmomanometer, but you do not have a stethoscope or any other equipment, how can you measure systolic blood pressure? a 18.Prior to a migraine attack, the pulse often becomes prominent superior to zygomatic arch, just anterior to the ear. What is the name of the artery with its pulse at this point?