Applications

Femoral Head

Adequate blood perfusion is required for bone healing / knitting processes and laser Doppler is an established technique for the monitoring of blood flow in bone (Nötzli et al, 2002). In areas where the blood supply is limited to a few vessels, such as the femoral head, laser Doppler has been shown to give optimal perfusion measurements and used to estimate microcirculatory compromise (Sugamoto et al, 1998).

High power laser Doppler used in combination with wide separation probes (uniquely offered by moorVMS-LDF1-HP and VP7BS-HP) enables a larger volume of bone to be sampled when compared to standard laser Doppler systems. Sampling a larger volume aids improved signal-to-noise ratio whilst also reducing site to site variation. The monitoring of perfusion in the femoral head can be useful for many reasons including, but not limited to, during surgical dislocation of the hip (Nötzli et al, 2002) or during femoral head resurfacing arthroplasty (Amarasekera et al, 2008).

The combination of the high power moorVMS-LDF1-HP, specifically designed bone probe and dedicated moorVMS-PC software are ideally suited to this application.

Equipment Required

VP7BS-HP Needle Probe for intraosseous and surface measurements of blood flow with dimensions:

- Diameter = 3.3 mm
- Probe length = Various (available from 30 mm to 150 mm)
- Fibre separation = 2.15 mm

moorVMS-LDF1-HP

moorVMS-PC Windows Software

References

Amarasekera H. W., Costa M. L., Foguet P., Krikler S. J., Prakash U., Griffin, D. R. 2008 The blood flow to the femoral head/neck junction during resurfacing arthroplasty, a comparison of two approaches using laser Doppler flowmetry. The Journal of Bone and Joint Surgery, Vol. 90-B, No. 4, April 2008 pp442-445

Nötzli H. P., Siebenrock K. A., Hempfing A., Ramseier L. E., Ganz R. 2002 Perfusion of the femoral head during surgical dislocation of the hip, monitoring by laser Doppler flowmetry. The Journal of Bone and Joint Surgery, Vol. 84, No. 2, March 2002 pp 300-304

Sugamoto K., Ochi T., Takahashi Y., Tamura T., Matsuoka T. 1998 Haemodynamic measurement in the femoral head using laser Doppler. Clinical Orthopaedics and Related Research Vol. 353, pp 138-147

For additional information on this Application or advice for tailoring Moor Instruments products to your specific application contact us for more information.