title: Non-invasive, minute-to-minute estimates of systemic arterial pressure and pulse pressure variation using radial artery tonometry.
abstract: The Tensys T-line uses tonometry to reproduce the arterial blood pressure tracing non-invasively. The purpose of this study was to assess the agreement between estimates of the T-line and an intra-arterial catheter (for both mean arterial pressure [MAP] and pulse pressure variation [PPV]) in the setting of spine surgery. Continuous blood pressure data were collected for 7507 minutes from 25 patients. Five increasingly aggressive T-line filters were applied. The mean bias for mean, diastolic and systolic blood pressure ranged from 3.4-6.4, 3.1-7.1 and 0.1-0.8 mmHg and 6.5-11.8% for PPV. Ninety-five per cent confidence intervals for mean, diastolic and systolic blood pressure ranged from 24-28, 23.1-24.7 and 33.4-35.6 mmHg for 14-21% for PPV. The limits of agreement preclude the use of the T-line for reliable estimation of MAP or PPV in spine surgery.
authors: Department of Anesthesiology, University of Virginia Health Sciences Center, VA, Charlottesville, USA.
authors: Douglas A
authors: DA
authors: Colquhoun
authors: Katherine T
authors: KT
authors: Forkin
authors: Lauren K
authors: LK
authors: Dunn
authors: David L
authors: DL
authors: Bogdonoff
authors: Marcel E
authors: ME
authors: Durieux
authors: Robert H
authors: RH
authors: Thiele
mesh_terms: D001794:Blood Pressure; D001795:Blood Pressure Determination / Q000379:methods; D006801:Humans; D008365:Manometry; D016343:Monitoring, Intraoperative / Q000379:methods; D017534:Radial Artery / Q000502:physiology*