Assessment of tissue viability in frostbite by 99mTc pertechnetate scintigraphy

Decreased Radiopharmaceutical Uptake (Photopenia) in Delayed Phase Scintigraphic Images in Three Horses

“…Scintigraphy is commonly used in people to assess tissue viability in soft tissues and findings of areas of infarction and nonviability in cardiac tissue are common 16 . Scintigraphy has proven value as an aid in determining tissue viability in people with complex injuries of the extremities 16–19 . In people with electrical burns and frostbite, photopenia is an accurate way to predict tissue necrosis and lack of viability 16–19 .…”

“…Scintigraphy has proven value as an aid in determining tissue viability in people with complex injuries of the extremities 16–19 . In people with electrical burns and frostbite, photopenia is an accurate way to predict tissue necrosis and lack of viability 16–19 . Scintigraphic examination is accurate in the assessment of tissue viability; therefore, it has been shown to be a reliable presurgical planning modality to determine the level of surgical amputation 16–19 .…”

“…I NCREASED RADIOPHARMACEUTICAL UPTAKE (IRU) in bone phase scintigraphic images is used to identify areas of bone modeling. Decreased radiopharmaceutical uptake, or photopenia, in delayed phase images is recognized in people and in small animals [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] but has only been briefly described in the horse. 20,21 Photopenic lesions are thought to be caused by inadequate blood flow that results in lack of delivery of radiopharmaceutical to bone.…”

Frostbite: Spectrum of Imaging Findings and Guidelines for Management

“…Technetium 99m-labeled pertechnetate has also been used with similar results but has been less widely investigated and does not provide critical information regarding bone viability (45,46). Planar blood flow phase images are first acquired at 1-3 frames per second for 60 seconds after injection, which provides information regarding macrovascular perfusion to the affected limb.…”

La scintigraphie osseuse dans l’évaluation de la vascularisation osseuse au niveau de la main et du poignet

“…Les patients ont été étudiés à 48 heures après leurs gelures. Pour Salimi et al [40], la SO permet également de faire la différence entre l'os viable et l'os nécrosé, ce qui a un intérêt majeur pour la prise en charge.…”