Applications
Critical Limb Ischemia
The term critical limb ischaemia (CLI) is used to describe patients with a typical ischaemic pain at rest (TASC II) and occurs as a manifestation of peripheral artery disease. In patients with CLI the number of capillaries is reduced, and vascular fields can be seen in patients with severe cases of the disease (Piagessi et al, 2009). As such, it is very important that patients with CLI are identified rapidly as they are at a high risk of limb loss, fatal and non-fatal vascular events (TASC II). Laser Doppler is commonly used in the testing of CLI (Norgren et al, 2007).
One such test used as an aid for the diagnosis of CLI is the calculation of toe pressure to assess distal perfusion (Ubbink et al 2004). This can be simply and rapidly achieved using the moorVMS-LDF and moorVMS-PRES, with automatic calculations of toe pressure and printable reports available with the dedicated moorVMS-PC software – further details of toe blood pressure assessments can be found here.
| Ankle pressure (mmHg) in CLI | <50 |
| Ankle pressure (mmHg) in CLI | <30 |
| Toe pressure (mmHg) in CLI | <0.5 |
| ABPI (ratio) in CLI | <40 |
Table – Important measures of pressure in critical limb ischaemia (Piaggesi et al, 2009, TASC II 2007)
Equipment:
The following equipment is recommended for measurement of ABPI:
- moorVMS-LDF Laser Doppler Monitor
- moorVMS-PRES Pressure Cuff Controller
- moorVMS-PC; Dedicated PC software for automated calculations of TP and production of Reports
- Toe cuff
- Probes
- VP1T (includes temperature measurement)
References
Norgren L., Hiatt W. R., Dormandy J. A., Nehler M. R., Harris K. A., Fowkes F. G. R. on behalf of the TASC II Working Group.2007 Inter-Society Consensus for the Management of Peripheral Arterial Disease (TASC II). European Journal of Vascular and Endovascular Surgery, 33, S1eS75
Piaggesi A., Rizzo L., Tedeschi A., Scatena A., Goretti C., Del Prato S. 2009 Measurements in Diabetic Foot , Journal of Wound Technology, No. 3, pp 19-23
TASC II 2007 Summary of the Inter-Society Consensus for the management of PAD (TASC II) guidelines. Published January 2007 www.tasc-2-pad.org Section D: Chronic Critical Limb Ischaemia
Ubbink, D, Th. 2004 Toe blood pressure measurements in patients suspected of leg ischaemia: A new laser Doppler device compared with photoplethysmography. European Journal of Endovascular Surgery, 27, pp 629-634
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