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Cardiac signal estimation based on the arterial and venous pressure signals of a hemodialysis machine

Holmer, M LU ; Sandberg, F LU ; Solem, K LU ; Olde, B and Sörnmo, L LU (2016) In Physiological Measurement 37(9). p.1499-1515
Abstract
Continuous cardiac monitoring is usually not performed during hemodialysis treatment, although a majority of patients with kidney failure suffer from cardiovascular disease. In the present paper, a method is proposed for estimating a cardiac pressure signal by combining the arterial and the venous pressure sensor signals of the hemodialysis machine. The estimation is complicated by the periodic pressure disturbance caused by the peristaltic blood pump, with an amplitude much larger than that of the cardiac pressure signal. Using different techniques for combining the arterial and venous pressure signals, the performance is evaluated and compared to that of an earlier method which made use of the venous pressure only. The heart rate and the... (More)
Continuous cardiac monitoring is usually not performed during hemodialysis treatment, although a majority of patients with kidney failure suffer from cardiovascular disease. In the present paper, a method is proposed for estimating a cardiac pressure signal by combining the arterial and the venous pressure sensor signals of the hemodialysis machine. The estimation is complicated by the periodic pressure disturbance caused by the peristaltic blood pump, with an amplitude much larger than that of the cardiac pressure signal. Using different techniques for combining the arterial and venous pressure signals, the performance is evaluated and compared to that of an earlier method which made use of the venous pressure only. The heart rate and the heartbeat occurrence times, determined from the estimated cardiac pressure signal, are compared to the corresponding quantities determined from a photoplethysmographic reference signal. Signals from 9 complete hemodialysis treatments were analyzed. For a heartbeat amplitude of 0.5 mmHg, the median absolute deviation between estimated and reference heart rate was 1.3 bpm when using the venous pressure signal only, but dropped to 0.6 bpm when combining the pressure signals. The results show that the proposed method offers superior estimation at low heartbeat amplitudes. Consequently, more patients can be successfully monitored during treatment without the need of extra sensors. The results are preliminary, and need to be verified on a separate dataset. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physiological Measurement
volume
37
issue
9
pages
17 pages
publisher
IOP Publishing
external identifiers
  • Scopus:84985994527
ISSN
0967-3334
language
English
LU publication?
yes
id
0c0866be-f811-42ab-a103-de64454934d3
alternative location
http://stacks.iop.org/0967-3334/37/i=9/a=1499
date added to LUP
2016-08-11 15:05:11
date last changed
2016-11-13 04:41:15
@misc{0c0866be-f811-42ab-a103-de64454934d3,
  abstract     = {Continuous cardiac monitoring is usually not performed during hemodialysis treatment, although a majority of patients with kidney failure suffer from cardiovascular disease. In the present paper, a method is proposed for estimating a cardiac pressure signal by combining the arterial and the venous pressure sensor signals of the hemodialysis machine. The estimation is complicated by the periodic pressure disturbance caused by the peristaltic blood pump, with an amplitude much larger than that of the cardiac pressure signal. Using different techniques for combining the arterial and venous pressure signals, the performance is evaluated and compared to that of an earlier method which made use of the venous pressure only. The heart rate and the heartbeat occurrence times, determined from the estimated cardiac pressure signal, are compared to the corresponding quantities determined from a photoplethysmographic reference signal. Signals from 9 complete hemodialysis treatments were analyzed. For a heartbeat amplitude of 0.5 mmHg, the median absolute deviation between estimated and reference heart rate was 1.3 bpm when using the venous pressure signal only, but dropped to 0.6 bpm when combining the pressure signals. The results show that the proposed method offers superior estimation at low heartbeat amplitudes. Consequently, more patients can be successfully monitored during treatment without the need of extra sensors. The results are preliminary, and need to be verified on a separate dataset.},
  author       = {Holmer, M and Sandberg, F and Solem, K and Olde, B and Sörnmo, L},
  issn         = {0967-3334},
  language     = {eng},
  month        = {08},
  number       = {9},
  pages        = {1499--1515},
  publisher    = {ARRAY(0x8766390)},
  series       = {Physiological Measurement},
  title        = {Cardiac signal estimation based on the arterial and venous pressure signals of a hemodialysis machine},
  volume       = {37},
  year         = {2016},
}