Trudno znaleźć to hasło, ale na jakimś forum pewna pani napisała, że miała robiony foraż, czyli nawierty:
Zabiegi polegają na wykonaniu przezskórnych wielokrotnych nawierceń głowy i szyjki kości udowej pod kontrolą obrazu rtg. http://www.arthros.pl/pl/martwica-glowy-kosci-udowej.html

or: forage biopsy

Źródło australijskie
In the early stages AVN, progression of the disease can be prevented or slowed with the use of bisphosphonate medications (used to improve bone density). Pain associated with AVN can often be significantly improved with a minimally invasive drilling procedure (Forage).
http://www.brisbanehipclinic.com.au/conditions/avascular-nec...

Źródło brytyjskie
All hips which develop osteonecrosis pass through a stage in which the joint is radiographically and clinically normal (Stage 0, the "silent hip"); later the hip becomes painful but the radiographs remain normal (Stage I). Consequently, a normal radiograph does not necessarily imply a normal hip and in these circumstances diagnosis is possible only by functional exploration of bone (FEB).
Despite the complex pathogenesis, the basic cause, a disturbance of intra-osseous circulation, determines the evolution of the disease. The stages of this evolution account for the considerable variation in the clinical and radiographic signs.
Prevention of osteonecrosis must be based on treatment of the cause. Curative treatment can be achieved by forage-biopsy in the preradiographic Stage 0 and in Stages I and II.
http://tinyurl.com/pc7e7h6