Method and device for measuring pulse rate, blood pressure, and monitoring blood vessel access

摘要

A method and device for measuring a patient's pulse rate and blood pressure and also the condition of the blood vessel access can be accurately monitored by identifying a frequency component of the pressure wave caused by the patient's heartbeat among other pressure waves in a fluid by frequency analysis. The method and device are used when a medical device is connected to the patient's blood vessel via a blood vessel access and has a mechanical device for applying pressure to a fluid to transport it to said blood vessel.