title: Validation of a tonometric noninvasive arterial blood pressure monitor in the intensive care setting.
abstract: Intra-arterial measurement is considered the gold standard for continuous, beat-to-beat arterial blood pressure monitoring. However, arterial cannulation can be difficult and may cause complications such as thrombosis and ischaemia. Recently, a tonometric system, the Colin CBM-7000 has been developed for noninvasive beat-to-beat measurement of arterial blood pressure from the radial artery. We assessed the level of agreement between the CBM-7000 and invasive radial artery measurements in 15 patients on a neuro-intensive care unit. Agreement of systolic, diastolic and mean arterial pressure values was limited, with approximately 34% of mean arterial pressures differing by over 10 mmHg. In many cases, this was due to a downward drift of the noninvasive measurements over time. Furthermore, there was a tendency to underestimate low pressures and overestimate high pressures. In our opinion, the Colin CBM-7000 cannot be recommended for continuous blood pressure monitoring in the intensive care setting.
authors.affiliation: University Department of Anaesthesia and Academic Neurosurgery, Box 167, Addenbrooke's Hospital, Cambridge CB2 2QQ, UK. las30@cam.ac.uk
authors.forename: L A
authors.initials: LA
authors.lastname: Steiner
authors.forename: A J
authors.initials: AJ
authors.lastname: Johnston
authors.forename: R
authors.initials: R
authors.lastname: Salvador
authors.forename: M
authors.initials: M
authors.lastname: Czosnyka
authors.forename: D K
authors.initials: DK
authors.lastname: Menon
mesh_terms: D000328:Adult; D015924:Blood Pressure Monitors; D003422:Critical Care / Q000379:methods*; D006801:Humans; D008365:Manometry / Q000295:instrumentation; D008991:Monitoring, Physiologic / Q000295:instrumentation; D015203:Reproducibility of Results