Non-invasive continuous blood pressure monitoring: a review of current applications

doi:10.1007/s11684-013-0239-5

Front Med

0, Vol.

Issue () : 91-101 https://doi.org/10.1007/s11684-013-0239-5

REVIEW

Non-invasive continuous blood pressure monitoring: a review of current applications

Elena Chung¹, Guo Chen², Brenton Alexander¹, Maxime Cannesson¹(

)

1. Department of Anesthesiology & Perioperative Care, University of California, Irvine, CA 92868, USA; 2. Department of Anesthesiology and Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, China

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Abstract

Blood pressure monitoring has come a long way from the initial observations made by Reverend Hales in the 18th century. There are none that deny the importance of monitoring perioperative blood pressure; however, the limited ability of the current prevalent technology (oscillometric blood pressure monitoring) to offer continuous blood pressure measurements leaves room for improvement. Invasive monitoring is able to detect beat-to-beat blood pressure measurement, but the risks inherent to the procedure make it unsuitable for routine use except when this risk is outweighed by the benefits. This review focuses on the discoveries which have led up to the current blood pressure monitoring technologies, and especially the creation of those offering non-invasive but continuous blood pressure monitoring capabilities, including their methods of measurement and limitations.

Keywords non-invasive blood pressure monitoring continuous blood pressure monitoring invasive blood pressure monitoring Riva-Rocci technique oscillometric Pe?áz technique arterial tonometry pulse transit time

Corresponding Author(s): Cannesson Maxime,Email:mcanness@uci.edu

Issue Date: 05 March 2013

Cite this article:

Elena Chung,Guo Chen,Brenton Alexander, et al. Non-invasive continuous blood pressure monitoring: a review of current applications[J]. Front Med, 0, (): 91-101.

URL:

https://academic.hep.com.cn/fmd/EN/10.1007/s11684-013-0239-5
https://academic.hep.com.cn/fmd/EN/Y0/V/I/91

Fig.1 The first description of blood pressure is often attributed to a country parson, Revered Stephen Hales, in the 18th century. (This image is in the public domain and has been downloaded from the US National Library of Medicine website, http://www.nlm.nih.gov/hmd/ihm/, accessed on April 5, 2012.)

Fig.2 Mercury manometer developed by Poiseuille. (This image is in the public domain and has been downloaded from the US National Library of Medicine website, http://www.nlm.nih.gov/hmd/ihm/, accessed on April 5, 2012.)

Fig.3 Kymograph developed by Ludwig in 1847. (This image is in the public domain and has been downloaded from the US National Library of Medicine website, http://www.nlm.nih.gov/hmd/ihm/, accessed on April 5, 2012.)

Fig.4 In 1855, Vierordt created a non-invasive technique of measuring blood pressure with the sphygmograph. (This image is in the public domain and has been downloaded from the US National Library of Medicine website, http://www.nlm.nih.gov/hmd/ihm/, accessed on April 5, 2012.)

Fig.5 In 1905, Korotkoff, a Russian surgeon, discovered the method in use for over a century — the auscultatory method — which required the inflatable blood pressure cuff and stethoscope. (This image is in the public domain and has been downloaded from Wikimedia website, http://commons.wikimedia.org/wiki/Main_Page, accessed on April 5, 2012.)

Fig.6 Sphygomanometer. (This image is in the public domain and has been downloaded from Wikimedia website, http://commons.wikimedia.org/wiki/Main_Page, accessed on April 5, 2012.)

Tab.1 Different techniques for blood pressure monitoring

Fig.7 Demonstration of non-invasive and beat-to-beat arterial pressure monitoring systems (“Nexfin,” BMeye [top], and “CNAP,” CNSystem [bottom]).

Fig.8 Demonstration of an arterial tonometry device (T-Line, Tensys Medical).

1	American Society of Anesthesiologists. Standards of the American Society of Anesthesiologists: Standards for Basic Anesthetic Monitoring.; Available from: http://www.asahq.org/For-Healthcare-Professionals/~/media/For%2520Members/documents/Standards%2520Guidelines%2520Stmts/Basic%2520Anesthetic%2520Monitoring%25202011.ashx (Accessed on January12, 2012)
2	Cannesson M, Pestel G, Ricks C, Hoeft A, Perel A. Hemodynamic monitoring and management in patients undergoing high risk surgery: a survey among North American and European anesthesiologists. Crit Care 2011; 15(4): R197 doi: 10.1186/cc10364 pmid:21843353
3	Bijker JB, van Klei WA, Kappen TH, van Wolfswinkel L, Moons KG, Kalkman CJ. Incidence of intraoperative hypotension as a function of the chosen definition: literature definitions applied to a retrospective cohort using automated data collection. Anesthesiology 2007; 107(2): 213-220 doi: 10.1097/01.anes.0000270724.40897.8e pmid:17667564
4	Bijker JB, Persoon S, Peelen LM, Moons KG, Kalkman CJ, Kappelle LJ, van Klei WA. Intraoperative hypotension and perioperative ischemic stroke after general surgery: a nested case-control study. Anesthesiology 2012; 116(3): 658-664 doi: 10.1097/ALN.0b013e3182472320 pmid:22277949
5	Monk TG, Saini V, Weldon BC, Sigl JC. Anesthetic management and one-year mortality after noncardiac surgery. Anesth Analg 2005; 100(1): 4-10 doi: 10.1213/01.ANE.0000147519.82841.5E pmid:15616043
6	Saager L, Greenwald SD, Kelley SD, Schubert A, Sessler DI.. Duration of a “triple low” of blood pressure, BIS, and anesthestic concentration predicts poor outcome. Anesthesiology 2009; 111: A880
7	Tassoudis V, Vretzakis G, Petsiti A, Stamatiou G, Bouzia K, Melekos M, Tzovaras G. Impact of intraoperative hypotension on hospital stay in major abdominal surgery. J Anesth 2011; 25(4): 492-499 doi: 10.1007/s00540-011-1152-1 pmid:21547554
8	Ramsey M 3rd. Blood pressure monitoring: automated oscillometric devices. J Clin Monit 1991; 7(1): 56-67 doi: 10.1007/BF01617900 pmid:1999699
9	Smulyan H, Safar ME. Blood pressure measurement: retrospective and prospective views. Am J Hypertens 2011; 24(6): 628-634 doi: 10.1038/ajh.2011.22 pmid:21350431
10	Kroeker EJ, Wood EH. Comparison of simultaneously recorded central and peripheral arterial pressure pulses during rest, exercise and tilted position in man. Circ Res 1955; 3(6): 623-632 doi: 10.1161/01.RES.3.6.623 pmid:13270378
11	Bailey RH, Knaus VL, Bauer JH. Aneroid sphygmomanometers. An assessment of accuracy at a university hospital and clinics. Arch Intern Med 1991; 151(7): 1409-1412 doi: 10.1001/archinte.1991.00400070157022 pmid:2064493
12	Marks LA, Groch A. Optimizing cuff width for noninvasive measurement of blood pressure. Blood Press Monit 2000; 5(3): 153-158 doi: 10.1097/00126097-200006000-00002 pmid:10915227
13	Finnie KJ, Watts DG, Armstrong PW. Biases in the measurement of arterial pressure. Crit Care Med 1984; 12(11): 965-968 doi: 10.1097/00003246-198411000-00009 pmid:6499482
14	Glasser SP, Ramsey MR 3rd. An automated system for blood pressure determination during exercise. Circulation 1981; 63(2): 348-353 doi: 10.1161/01.CIR.63.2.348 pmid:7449058
15	Bur A, Herkner H, Vlcek M, Woisetschl?ger C, Derhaschnig U, Delle Karth G, Laggner AN, Hirschl MM. Factors influencing the accuracy of oscillometric blood pressure measurement in critically ill patients. Crit Care Med 2003; 31(3): 793-799 doi: 10.1097/01.CCM.0000053650.12025.1A pmid:12626986
16	Alpert BS. Oscillometric blood pressure values are algorithm-specific. Am J Cardiol 2010; 106(10): 1524, author reply 1524-1525 doi: 10.1016/j.amjcard.2010.08.030 pmid:21059454
17	Amoore JN, Geake WB, Scott DH. Oscillometric non-invasive blood pressure measurements: the influence of the make of instrument on readings? Med Biol Eng Comput 1997; 35(2): 131-134 doi: 10.1007/BF02534143 pmid:9136206
18	Gorback MS, Quill TJ, Graubert DA. The accuracy of rapid oscillometric blood pressure determination. Biomed Instrum Technol 1990; 24(5): 371-374 pmid:2224342
19	Sy WP. Ulnar nerve palsy possibly related to use of automatically cycled blood pressure cuff. Anesth Analg 1981; 60(9): 687-688 doi: 10.1213/00000539-198109000-00013 pmid:7196711
20	Bause GS, Weintraub AC, Tanner GE. Skin avulsion during oscillometry. J Clin Monit 1986; 2(4): 262-263 doi: 10.1007/BF02851174 pmid:3783197
21	Scheer B, Perel A, Pfeiffer UJ. Clinical review: complications and risk factors of peripheral arterial catheters used for haemodynamic monitoring in anaesthesia and intensive care medicine. Crit Care 2002; 6(3): 199-204 doi: 10.1186/cc1489 pmid:12133178
22	Brzezinski M, Luisetti T, London MJ. Radial artery cannulation: a comprehensive review of recent anatomic and physiologic investigations. Anesth Analg 2009; 109(6): 1763-1781 doi: 10.1213/ANE.0b013e3181bbd416 pmid:19923502
23	Hamilton WF. D.P., An experimental study of the standing waves in the pulse propagated through the aorta. Am J Physiol 1938; (125): 48-59
24	O’Rourke MF, Pauca A, Jiang XJ. Pulse wave analysis. Br J Clin Pharmacol 2001; 51(6): 507-522 doi: 10.1046/j.0306-5251.2001.01400.x pmid:11422010
25	Avolio AP, Van Bortel LM, Boutouyrie P, Cockcroft JR, McEniery CM, Protogerou AD, Roman MJ, Safar ME, Segers P, Smulyan H. Role of pulse pressure amplification in arterial hypertension: experts’ opinion and review of the data. Hypertension 2009; 54(2): 375-383 doi: 10.1161/HYPERTENSIONAHA.109.134379 pmid:19564542
26	Laurent S, Cockcroft J, Van Bortel L, Boutouyrie P, Giannattasio C, Hayoz D, Pannier B, Vlachopoulos C, Wilkinson I, Struijker-Boudier H ; European Network for Non-invasive Investigation of Large Arteries. Expert consensus document on arterial stiffness: methodological issues and clinical applications. Eur Heart J 2006; 27(21): 2588-2605 doi: 10.1093/eurheartj/ehl254 pmid:17000623
27	Lamia B, Chemla D, Richard C, Teboul JL. Clinical review: interpretation of arterial pressure wave in shock states. Crit Care 2005; 9(6): 601-606 doi: 10.1186/cc3891 pmid:16356245
28	Cannesson M, Le Manach Y, Hofer CK, Goarin JP, Lehot JJ, Vallet B, Tavernier B. Assessing the diagnostic accuracy of pulse pressure variations for the prediction of fluid responsiveness: a “gray zone” approach. Anesthesiology 2011; 115(2): 231-241 doi: 10.1097/ALN.0b013e318225b80a pmid:21705869
29	Peňáz J. Photoelectric measurement of blood pressure, volume and ?ow in the ?nger. Digest of the 10th International Conference on Medical and Biological Engineering-Dresden , 1973
30	Imholz BP, Wieling W, van Montfrans GA, Wesseling KH. Fifteen years experience with finger arterial pressure monitoring: assessment of the technology. Cardiovasc Res 1998; 38(3): 605-616 doi: 10.1016/S0008-6363(98)00067-4 pmid:9747429
31	Wesseling KH, Settels JJ, van der Hoeven GM, Nijboer JA, Butijn MW, Dorlas JC. Effects of peripheral vasoconstriction on the measurement of blood pressure in a finger. Cardiovasc Res 1985; 19(3): 139-145 doi: 10.1093/cvr/19.3.139 pmid:3986857
32	Kemmotsu O, Ueda M, Otsuka H, Yamamura T, Winter DC, Eckerle JS. Arterial tonometry for noninvasive, continuous blood pressure monitoring during anesthesia. Anesthesiology 1991; 75(2): 333-340 doi: 10.1097/00000542-199108000-00023 pmid:1859020
33	Hansen S, Staber M. Oscillometric blood pressure measurement used for calibration of the arterial tonometry method contributes significantly to error. Eur J Anaesthesiol 2006; 23(9): 781-787 doi: 10.1017/S0265021506000688 pmid:16723049
34	Janelle GM, Gravenstein N. An accuracy evaluation of the T-Line Tensymeter (continuous noninvasive blood pressure management device) versus conventional invasive radial artery monitoring in surgical patients. Anesth Analg 2006; 102(2): 484-490 doi: 10.1213/01.ane.0000194873.52453.bd pmid:16428547
35	Dueck R, Goedje O, Clopton P. Noninvasive continuous beat-to-beat radial artery pressure via TL-200 applanation tonometry. J Clin Monit Comput 2012; 26(2): 75-83 doi: 10.1007/s10877-012-9336-2 pmid:22258303
36	Lane JD, Greenstadt L, Shapiro D, Rubinstein E. Pulse transit time and blood pressure: an intensive analysis. Psychophysiology 1983; 20(1): 45-49 doi: 10.1111/j.1469-8986.1983.tb00899.x pmid:6828611
37	Marie GV, Lo CR, Van Jones J, Johnston DW. The relationship between arterial blood pressure and pulse transit time during dynamic and static exercise. Psychophysiology 1984; 21(5): 521-527 doi: 10.1111/j.1469-8986.1984.tb00235.x pmid:6473621
38	Drzewiecki GM, Melbin J, Noordergraaf A. Arterial tonometry: review and analysis. J Biomech 1983; 16(2): 141-152 doi: 10.1016/0021-9290(83)90037-4 pmid:6863329
39	Biais M, Vidil L, Roullet S, Masson F, Quinart A, Revel P, Sztark F. Continuous non-invasive arterial pressure measurement: evaluation of CNAP device during vascular surgery. Ann Fr Anesth Reanim 2010; 29(7-8): 530-535 doi: 10.1016/j.annfar.2010.05.002 pmid:20542405
40	Imholz BP, van Montfrans GA, Settels JJ, van der Hoeven GM, Karemaker JM, Wieling W. Continuous non-invasive blood pressure monitoring: reliability of Finapres device during the Valsalva manoeuvre. Cardiovasc Res 1988; 22(6): 390-397 doi: 10.1093/cvr/22.6.390 pmid:3224351
41	Lemson J, Hofhuizen CM, Schraa O, Settels JJ, Scheffer GJ, van der Hoeven JG. The reliability of continuous noninvasive finger blood pressure measurement in critically ill children. Anesth Analg 2009; 108(3): 814-821 doi: 10.1213/ane.0b013e318194f401 pmid:19224788
42	Maggi R, Viscardi V, Furukawa T, Brignole M. Non-invasive continuous blood pressure monitoring of tachycardic episodes during interventional electrophysiology. Europace 2010; 12(11): 1616-1622 doi: 10.1093/europace/euq333 pmid:20837572
43	Hofhuizen CM, Lemson J, Hemelaar AE, Settels JJ, Schraa O, Singh SK, van der Hoeven JG, Scheffer GJ. Continuous non-invasive finger arterial pressure monitoring reflects intra-arterial pressure changes in children undergoing cardiac surgery. Br J Anaesth 2010; 105(4): 493-500 doi: 10.1093/bja/aeq201 pmid:20693181
44	Jeleazcov C, Krajinovic L, Münster T, Birkholz T, Fried R, Schüttler J, Fechner J. Precision and accuracy of a new device (CNAPTM) for continuous non-invasive arterial pressure monitoring: assessment during general anaesthesia. Br J Anaesth 2010; 105(3): 264-272 doi: 10.1093/bja/aeq143 pmid:20627878
45	Eckert S, Horstkotte D. Comparison of Portapres non-invasive blood pressure measurement in the finger with intra-aortic pressure measurement during incremental bicycle exercise. Blood Press Monit 2002; 7(3): 179-183 doi: 10.1097/00126097-200206000-00006 pmid:12131075
46	Schramm C, Baat L, Plaschke K. Continuous noninvasive arterial pressure: assessment in older and high-risk patients under analgesic sedation. Blood Press Monit 2011; 16(6): 270-276 doi: 10.1097/MBP.0b013e32834d777f pmid:22008982
47	Hahn R, Rin?sl H, Neuner M, Kettner SC. Clinical validation of a continuous non-invasive haemodynamic monitor (CNAP^?; 500) during general anaesthesia. Br J Anaesth 2012108(4):581-585 pmid:22307242
48	Ilies C, Bauer M, Berg P, Rosenberg J, Hedderich J, Bein B, Hinz J, Hanss R. Investigation of the agreement of a continuous non-invasive arterial pressure device in comparison with invasive radial artery measurement. Br J Anaesth 2012; 108(2): 202-210 doi: 10.1093/bja/aer394 pmid:22171358
49	Garnier RP, van der Spoel AG, Sibarani-Ponsen R, Markhorst DG, Boer C. Level of agreement between Nexfin non-invasive arterial pressure with invasive arterial pressure measurements in children. Br J Anaesth 2012; 109(4): 609-615 doi: 10.1093/bja/aes295 pmid:22907342
50	Martina JR, Westerhof BE, van Goudoever J, de Beaumont EM, Truijen J, Kim YS, Immink RV, J?bsis DA, Hollmann MW, Lahpor JR, de Mol BA, van Lieshout JJ. Noninvasive continuous arterial blood pressure monitoring with Nexfin?. Anesthesiology 2012; 116(5): 1092-1103 doi: 10.1097/ALN.0b013e31824f94ed pmid:22415387
51	Akkermans J, Diepeveen M, Ganzevoort W, van Montfrans GA, Westerhof BE, Wolf H. Continuous non-invasive blood pressure monitoring, a validation study of Nexfin in a pregnant population. Hypertens Pregnancy 2009; 28(2): 230-242 doi: 10.1080/10641950802601260 pmid:19437233
52	Eeftinck Schattenkerk DW, van Lieshout JJ, van den Meiracker AH, Wesseling KR, Blanc S, Wieling W, van Montfrans GA, Settels JJ, Wesseling KH, Westerhof BE. Nexfin noninvasive continuous blood pressure validated against Riva-Rocci/Korotkoff. Am J Hypertens 2009; 22(4): 378-383 doi: 10.1038/ajh.2008.368 pmid:19180062
53	Tanaka H, Thulesius O, Yamaguchi H, Mino M, Konishi K. Continuous non-invasive finger blood pressure monitoring in children. Acta Paediatr 1994; 83(6): 646-652 doi: 10.1111/j.1651-2227.1994.tb13100.x pmid:7919764
54	Sipkens LM, Treskes K, Ariese-Beldman K, Veerman DP, Boer C. Application of Nexfin noninvasive beat-to-beat arterial blood pressure monitoring in autonomic function testing. Blood Press Monit 2011; 16(5): 246-251 doi: 10.1097/MBP.0b013e32834b4431 pmid:21885960
55	Martina JR, Westerhof BE, Van Goudoever J, De Jonge N, Van Lieshout JJ, Lahpor JR, De Mol BA. Noninvasive blood pressure measurement by the Nexfin monitor during reduced arterial pulsatility: a feasibility study. ASAIO J 2010; 56(3): 221-227 doi: 10.1097/MAT.0b013e3181d70227 pmid:20449896
56	Siebig S, Rockmann F, Sabel K, Zuber-Jerger I, Dierkes C, Brünnler T, Wrede CE. Continuous non-invasive arterial pressure technique improves patient monitoring during interventional endoscopy. Int J Med Sci 2009; 6(1): 37-42 doi: 10.7150/ijms.6.37 pmid:19173016
57	Chen G, Chung E, Meng L, Alexander B, Vu T, Rinehart J, Cannesson M. Impact of non invasive and beat-to-beat arterial pressure monitoring on intraoperative hemodynamic management. J Clin Monit Comput 2012; 26(2): 133-140 doi: 10.1007/s10877-012-9344-2 pmid:22382920
58	Lu Z, Mukkamala R. Continuous cardiac output monitoring in humans by invasive and noninvasive peripheral blood pressure waveform analysis. J Appl Physiol 2006; 101(2): 598-608 doi: 10.1152/japplphysiol.01488.2005 pmid:16849813
59	Rang S, de Pablo Lapiedra B, van Montfrans GA, Bouma BJ, Wesseling KH, Wolf H. Modelflow: a new method for noninvasive assessment of cardiac output in pregnant women. Am J Obstet Gynecol 2007; 196(3): 235 e1-8 pmid:17346534
60	Bogert LW, Wesseling KH, Schraa O, Van Lieshout EJ, de Mol BA, van Goudoever J, Westerhof BE, van Lieshout JJ. Pulse contour cardiac output derived from non-invasive arterial pressure in cardiovascular disease. Anaesthesia 2010; 65(11): 1119-1125 doi: 10.1111/j.1365-2044.2010.06511.x pmid:20860647
61	Broch O, Renner J, Gruenewald M, Meybohm P, Sch?ttler J, Caliebe A, Steinfath M, Malbrain M, Bein B. A comparison of the Nexfin? and transcardiopulmonary thermodilution to estimate cardiac output during coronary artery surgery. Anaesthesia 2012; 67(4): 377-383 doi: 10.1111/j.1365-2044.2011.07018.x pmid:22324797
62	van der Spoel AG, Voogel AJ, Folkers A, Boer C, Bouwman RA. Comparison of noninvasive continuous arterial waveform analysis (Nexfin) with transthoracic Doppler echocardiography for monitoring of cardiac output. J Clin Anesth 2012; 24(4): 304-309 doi: 10.1016/j.jclinane.2011.09.008 pmid:22608585
63	Chen G, Meng L, Alexander B, Tran NP, Kain ZN, Cannesson M. Comparison of noninvasive cardiac output measurements using the Nexfin monitoring device and the esophageal Doppler. J Clin Anesth 2012; 24(4): 275-283 doi: 10.1016/j.jclinane.2011.08.014 pmid:22608581
64	Fischer MO, Avram R, Carjaliu I, Massetti M, Gérard JL, Hanouz JL, Fellahi JL. Non-invasive continuous arterial pressure and cardiac index monitoring with Nexfin after cardiac surgery. Br J Anaesth 2012; 109(4): 514-521 doi: 10.1093/bja/aes215 pmid:22750726
65	McCarthy T, Telec N, Dennis A, Griffiths J, Buettner A. Ability of non-invasive intermittent blood pressure monitoring and a continuous non-invasive arterial pressure monitor (CNAP?) to provide new readings in each 1-min interval during elective caesarean section under spinal anaesthesia. Anaesthesia 2012; 67(3): 274-279 doi: 10.1111/j.1365-2044.2011.06996.x pmid:22321084
66	Kemmotsu O, Ueda M, Otsuka H, Yamamura T, Okamura A, Ishikawa T, Winter DC, Eckerle JS. Blood pressure measurement by arterial tonometry in controlled hypotension. Anesth Analg 1991; 73(1): 54-58 doi: 10.1213/00000539-199107000-00011 pmid:1858991
67	Sato T, Nishinaga M, Kawamoto A, Ozawa T, Takatsuji H. Accuracy of a continuous blood pressure monitor based on arterial tonometry. Hypertension 1993; 21(6 Pt 1): 866-874 doi: 10.1161/01.HYP.21.6.866 pmid:8500866
68	Weiss BM, Spahn DR, Rahmig H, Rohling R, Pasch T. Radial artery tonometry: moderately accurate but unpredictable technique of continuous non-invasive arterial pressure measurement. Br J Anaesth 1996; 76(3): 405-411 doi: 10.1093/bja/76.3.405 pmid:8785142
69	Kemmotsu O, Ohno M, Takita K, Sugimoto H, Otsuka H, Morimoto Y, Mayumi T. Noninvasive, continuous blood pressure measurement by arterial tonometry during anesthesia in children. Anesthesiology 1994; 81(5): 1162-1168 doi: 10.1097/00000542-199411000-00009 pmid:7978474
70	Harasawa K, Yamane M, Morimoto Y, Kemmotsu O. Performance of a tonometer for arterial pressure measurement during anesthesia in the elderly. J Anesth 2004; 18(4): 316-317 doi: 10.1007/s00540-004-0261-5 pmid:15549479
71	Papaioannou TG, Stamatelopoulos KS, Gialafos E, Vlachopoulos C, Karatzis E, Nanas J, Lekakis J. Monitoring of arterial stiffness indices by applanation tonometry and pulse wave analysis: reproducibility at low blood pressures. J Clin Monit Comput 2004; 18(2): 137-144 doi: 10.1023/B:JOCM.0000032809.71793.b8 pmid:15362275
72	O’Rourke MF, Seward JB. Central arterial pressure and arterial pressure pulse: new views entering the second century after Korotkov. Mayo Clin Proc 2006; 81(8): 1057-1068 doi: 10.4065/81.8.1057 pmid:16901029
73	O’Rourke MF, Adji A. An updated clinical primer on large artery mechanics: implications of pulse waveform analysis and arterial tonometry. Curr Opin Cardiol 2005; 20(4): 275-281 doi: 10.1097/01.hco.0000166595.44711.6f pmid:15956823
74	Saugel B, Fassio F, Hapfelmeier A, Meidert AS, Schmid RM, Huber W. The T-Line TL-200 system for continuous non-invasive blood pressure measurement in medical intensive care unit patients. Intensive Care Med 2012; 38(9): 1471-1477 doi: 10.1007/s00134-012-2617-x pmid:22744376
75	Szmuk P, Pivalizza E, Warters RD, Ezri T, Gebhard R. An evaluation of the T-Line Tensymeter continuous noninvasive blood pressure device during induced hypotension. Anaesthesia 2008; 63(3): 307-312 doi: 10.1111/j.1365-2044.2007.05369.x pmid:18289239
76	Poon CC, Zhang YT. Cuff-less and noninvasive measurements of arterial blood pressure by pulse transit time. Conf Proc IEEE Eng Med Biol Soc 2005; 6: 5877-5880 pmid:17281597
77	Ahlstrom C, Johansson A, Uhlin F, L?nne T, Ask P. Noninvasive investigation of blood pressure changes using the pulse wave transit time: a novel approach in the monitoring of hemodialysis patients. J Artif Organs 2005; 8(3): 192-197 doi: 10.1007/s10047-005-0301-4 pmid:16235036
78	Fung P, Dumont G, Ries C, Mott C, Ansermino M. Continuous noninvasive blood pressure measurement by pulse transit time. Conf Proc IEEE Eng Med Biol Soc 2004; 1: 738-741 pmid:17271783
79	Lansdorp B, Ouweneel D, de Keijzer A, van der Hoeven JG, Lemson J, Pickkers P. Non-invasive measurement of pulse pressure variation and systolic pressure variation using a finger cuff corresponds with intra-arterial measurement. Br J Anaesth 2011; 107(4): 540-545 doi: 10.1093/bja/aer187 pmid:21700612
80	Monnet X, Dres M, Ferré A, Le Teuff G, Jozwiak M, Bleibtreu A, Le Deley MC, Chemla D, Richard C, Teboul JL. Prediction of fluid responsiveness by a continuous non-invasive assessment of arterial pressure in critically ill patients: comparison with four other dynamic indices. Br J Anaesth 2012; 109(3): 330-338 doi: 10.1093/bja/aes182 pmid:22735299

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