Non-invasive measurement of systolic blood pressure on the arm utilising photoplethysmography: development of the methodology.
Photoplethysmography (PPG) can be used to measure systolic blood pressure at the brachial artery. With a specially designed probe, positioned in the most distal position beneath a pressure cuff on the upper arm, this is possible. The distance between the light source (880 nm) and the photodetector was 20 mm. A test was performed on neuro-intensive care patients by determining blood pressure from the PPG curves, and, when it was compared with systolic blood pressure obtained from inserted indwelling arterial catheters, a correlation factor of r = 0.95 was achieved. The difference between blood pressure obtained using PPG and invasive blood pressure measurement was 3.9 +/- 9.1 mmHg (mean +/- SD), n = 19. The depth to the brachial artery was 13.9 +/- 4.1 mm (mean +/- SD), n = 18. A digital PPG system utilising pulsating light was also developed.
Laurent
C
C
Department of Biomedical Engineering, Linköpings universitet, Sweden. clala@imt.liu.se
Jönsson
B
B
Vegfors
M
M
Lindberg
L G
LG
D001132:Arm / Q000098:blood supply*; D001795:Blood Pressure Determination / Q000295:instrumentation / Q000379:methods; D003422:Critical Care / Q000379:methods; D004582:Electronics, Medical; D006801:Humans; D008991:Monitoring, Physiologic / Q000379:methods; D017156:Photoplethysmography / Q000295:instrumentation / Q000379:methods*
Am Surg. 1998 Feb;64(2):127-31
9486883
Anesth Analg. 1992 Feb;74(2):196-200
1731537
J Pediatr. 1994 Oct;125(4):591-5
7931880
Med Biol Eng Comput. 1996 Jan;34(1):82-3
8857316
Med Prog Technol. 1987;12(1-2):123-43
3627016
Comput Methods Programs Biomed. 1989 Apr;28(4):257-69
2649304
Clin Physiol. 2001 Mar;21(2):155-63
11318823
BMJ. 2001 Mar 3;322(7285):531-6
11230071
J Vasc Surg. 1994 Aug;20(2):267-70
8040951
J Clin Monit Comput. 1999 Dec;15(7-8):461-7
12578044
Anesthesiology. 1989 Jan;70(1):98-108
2643368
Acta Anaesthesiol Scand. 1986 Apr;30(3):227-30
3739580
J Biomed Opt. 2000 Oct;5(4):391-405
11092427
Med Biol Eng Comput. 1992 Sep;30(5):533-7
1293445
Blood Press Monit. 2003 Feb;8(1):27-30
12604933