title: An evaluation of the T-Line Tensymeter continuous noninvasive blood pressure device during induced hypotension.
abstract: A new continuous noninvasive blood pressure measurement device, the T-Line Tensymeter TL100 (Tensys Medical Inc., San Diego, CA, USA) which enables avoidance of arterial cannulation has been developed. We compared the values obtained using the T-Line values to simultaneous arterial line measurements in patients undergoing general anaesthesia with induced hypotension. Twenty-five patients, aged 18-70 years, were studied. The T-Line and arterial line were positioned on the contralateral wrists. Intra-operative, real-time, blood pressure data were electronically captured and stored on a computer. Bland-Altman plots and 95% limits of agreement show that the majority of T-Line data points were within 5 mmHg of the arterial line measurements (67%) and agreement was within 15 mmHg in 94.6% or more of all measurements. There was virtually no distinguishable error over the course of surgery using the device. In conclusion, the T-Line measurements correlate with arterial measurements during anaesthesia in which there were periods of both normotensive and hypotensive anaesthesia. The T-Line Tensymeter represents a noninvasive alternative to an arterial line in cases when arterial blood sampling is not required.
authors.affiliation: Department of Anaesthesiology, University of Texas South-western Medical Center, Dallas, TX, USA. pszmuk@gmail.com
authors.forename: P
authors.initials: P
authors.lastname: Szmuk
authors.forename: E
authors.initials: E
authors.lastname: Pivalizza
authors.forename: R D
authors.initials: RD
authors.lastname: Warters
authors.forename: T
authors.initials: T
authors.lastname: Ezri
authors.forename: R
authors.initials: R
authors.lastname: Gebhard
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000768:Anesthesia, General; D000886:Anthropometry; D001794:Blood Pressure; D015924:Blood Pressure Monitors; D005260:Female; D006801:Humans; D007023:Hypotension, Controlled; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000295:instrumentation*; D013131:Spine / Q000601:surgery