However, validation studies comparing continuous non-invasive BP measurements to continuous invasive BP measurements using an arterial catheter revealed contradictory results regarding the interchangeability of the methods.

Continuous non-invasive BP monitoring-compared to intermittent non-invasive measurements using oscillometry-also reduces the amount of intraoperative hypotension. In addition, continuous invasive BP monitoring detects twice as much intraoperative hypotension than intermittent non-invasive measurements using oscillometry and triggers vasopressor therapy in adults having non-cardiac surgery. Intermittent non-invasive measurements using oscillometry show clinically significant discrepancies compared to continuous invasive measurements using an arterial catheter and especially overestimate low BP. The choice of the BP monitoring method is important as it directly impacts clinical decision-making. There are several methods to measure BP: intermittent non-invasive measurements using oscillometry, continuous non-invasive measurements using methods such as the vascular unloading technique (also called “finger-cuff technology”), or continuous invasive measurements using an arterial catheter (also referred to as “direct” BP measurement). In perioperative and intensive care medicine, BP measurements have a significant impact on patient management, especially for the timely and correct identification and treatment of hypotension.

BP monitoring is mandatory in patients having surgery with anesthesia and patients with circulatory shock. Arterial blood pressure (BP) is a fundamental cardiovascular variable.

Free blood pressure chart pdf