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Chapter 7: Functional description
7-18
Fresenius Medical Care multiFiltrate IFU-EN-UK 15A-2015
Fig.: Schematic of regional anticoagulation
Legend
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Blood pump
2
Haemofilter
3
Air detector
4
Venous clamp
5
Citrate pump
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Citrate drop counter
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Calcium pump
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Calcium drop counter
Effect of the citrate
The citrate binds the ionised calcium that is present in the blood and
forms a calcium-citrate complex. The resulting reduction of the ionised
calcium concentration inhibits several steps in the coagulation cascade.
Regional citrate anticoagulation can have various consequences,
including a considerable reduction of the mutual activation of the
various vitamin K-dependent modified coagulation factors. The binding
of these coagulation factors to activated cell membranes requires
calcium which is bound to their GLA domain and is therefore only
possible with sufficiently high levels of ionised calcium.
Limits of citrate
anticoagulation
Citrate anticoagulation does not prevent coagulation in the
extracorporeal blood circuit in all cases. This is possibly explained by
the fact that activated thrombin, as opposed to prothrombin
(thrombinogen, factor II), no longer has a GLA domain, which explains
why the mechanism discussed above cannot be effective with thrombin.
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2
4
3
5
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Содержание multiFiltrate
Страница 1: ...multiFiltrate Instructions for Use Software version 5 3 Edition 15A 2015 Part no M56 963 1 ...
Страница 2: ......
Страница 11: ...Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 xi 15 2 Instructions on the use of free software 15 2 ...
Страница 12: ...xii Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 16: ...Chapter 1 Index 1 4 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 42: ...Chapter 3 Design 3 10 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 166: ...Chapter 4 Operation 4 124 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 Interrupting the treatment ...
Страница 186: ...Chapter 5 Alarm processing 5 20 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 188: ...Chapter 6 Cleaning disinfection 6 2 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 218: ...Chapter 7 Functional description 7 30 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 228: ...Chapter 9 Installation 9 4 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 234: ...Chapter 11 Technical Safety Checks maintenance procedures 11 2 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 252: ...Chapter 12 Specifications 12 18 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 260: ...Chapter 13 Definitions 13 8 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 266: ...Chapter 14 Options 14 6 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...
Страница 282: ...Chapter 15 Appendix 15 16 Fresenius Medical Care multiFiltrate IFU EN UK 15A 2015 ...