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Evaluation of blood flow within the subchondral bone of the femoral head: Use of the laser speckle method at surgery for osteonecrosis
Author(s) -
Fukuoka Shinji,
Hotokebuchi Takao,
Jingushi Seiya,
Fujii Hitoshi,
Sugioka Yoichi,
Iwamoto Yukihide
Publication year - 1999
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1002/jor.1100170113
Subject(s) - femoral head , speckle pattern , medicine , blood flow , laser doppler velocimetry , surgery , biomedical engineering , radiology , computer science , computer vision
The laser speckle method is a new form of tissue flowmetry that can analyze the interference pattern that appears when tissue is illuminated with a laser beam. During surgery for 100 cases of osteonecrosis of the femoral head, we measured the blood flow within the subchondral bone using this method. We compared the flow maps (two‐dimensional distribution of the microcirculation) obtained this way with the necrotic area estimated by the preoperative magnetic resonance images and with the collapse seen during surgery. The laser speckle method was able to distinguish between the ischemic areas and the normal areas in 92 femoral heads, including five hips for which neither the magnetic resonance images nor the collapse observed during surgery demonstrated a distinct margin surrounding the necrotic area. We concluded that the laser speckle method is useful for defining the margin around a necrotic area.