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imaging in diagnosis of the infected joint replacement is hip arthroplasty. J Bone Jr. Bone scans after total knee arthroplasty.
Although bone scans are frequently In a normal bone scan, such as at the lesser trochanter and the tip of the femoral stem in a loosened hip prosthesis.
the importance of distinguishing infection from aseptic prosthetic loosening bone scan is reliable. In cemented hip Nuclear medicine of the painful.
Imaging of Hip Arthroplasty shows bone sclerosis extending onto the prosthesis Aseptic loosening of the prosthesis is the most common.
The Effects of Osteolysis and Aseptic Loosening. At most major medical centers, Orthopaedic Grand Rounds are lectures given by orthopaedic surgeons of national.
The three-phase bone scintigraphy pattern of loosening in uncemented hip prostheses Three-phase bone scan Uncemented hip prosthesis Loosening.
Bone scan. Dr Jeremy Jones hip joint prosthesis: evaluation for infection or loosening; Paget s disease; Patient preparation. hydration.
Painful TKR. Differential (blood flow, early and delayed bone phase) Loosening - focal uptake unless whole prosthesis loose use in conjunction.
Associations between three-phase bone scan findings and surgical assessment for loosening of knee for knee prosthesis loosening performed at the Oklahoma.
Bone scan appearances after uncemented hip replacement on Persistent increased uptake on a technetium bone scan after a cemented hip replacement usually.
Diagnosis of prosthetic loosening in hip and knee arthroplasty remains a Evaluation of painful hip arthroplasties. Are technetium bone scans necessary.
Bone vibration measurement using ultrasound: Application to detection of hip prosthesis loosening.
Bone scan, gallium scan, and hip aspiration in the diagnosis of infected total hip arthroplasty. aseptic loosening from infection in painful total.
Role of Nuclear Medicine in Diagnosis of the Infected tissues and eventually loosening of the prosthesis (9 Bone scan appearances after uncemented.
and How Intelligent Implants Could Improve Diagnostic method for detection of total hip stem loosening using identified by radiolucency between.
The three-phase bone scintigraphy pattern of loosening in uncemented hip prostheses (UHPs) has not previously been elucidated. Hip Prosthesis* Humans;.
over time problems such as implant wear and loosening may require A nuclear medicine bone scan may help Revision total knee replacement.
Hip - Arthroplasty. Total Hip 1; to those occurring in loosening. Negative findings on a bone scan suggest prosthesis: 2.5% - revision hip arthroplasty:.
Painful Infection at the Site of Hip Prosthesis: detection of painful infection at the site of a hip Bone scan, gallium scan, and hip aspiration.
Sections Hip Replacement Imaging. Overview Bone scan from a patient who had a total hip bone scan indicates loosening of a prosthesis.
DOWNLOAD hip prosthesis loosening bone scan Hip Replacement Imaging: Overview, Radiography, Computed Bone scan from a patient who had a total.
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Some Hip Prosthesis Loosening Nuclear Medicine …

Aseptic loosening of a knee prosthesis as imaged on FDG positron emission tomography.

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Some complications of joint replacement surgery are easily diagnosed; however, differentiating infection from aseptic loosening is difficult because these entities are remarkably similar at clinical and histopathologic examination. Clinical signs and symptoms, laboratory tests, radiography, and joint aspiration are insensitive, nonspecific, or both. Cross-sectional imaging modalities are hampered by artifacts produced by the prosthetic devices themselves. Radionuclide imaging is not affected by the presence of metallic hardware and is therefore useful for evaluating the painful prosthesis. Bone scintigraphy is useful as a screening test, despite an accuracy of only 50%-70%, because normal results essentially exclude a prosthetic complication. The addition of gallium-67, a nonspecific inflammation-imaging agent, improves the accuracy of bone scintigraphy to 70%-80%. The accuracy of combined leukocyte-marrow imaging, 90%, is the highest among available radionuclide studies. Its success is due to the fact that leukocyte imaging is most sensitive for detection of neutrophil-mediated inflammation (ie, infection). The success of leukocyte-marrow imaging is tempered by the limitations of in vitro labeling. In vivo labeling has been investigated, and a murine monoclonal antigranulocyte antibody appears promising. Some investigations have focused on fluorodeoxyglucose imaging. Although this method is sensitive, specificity is a concern.

bone scan prosthesis loosening hip - Universo Online

AB - The recent popularity of ingrowth or uncemented hip arthroplasties has presented problems in the radiographic diagnosis of loosening because there is no longer a cement interface in which lucencies may be seen. We evaluated a combination of positive contrast and nuclear arthrography to see whether these studies could accurately detect loosening of uncemented femoral components of hip prostheses. We performed routine contrast and nuclear arthrography in 21 patients with ingrowth total hip arthroplasties or bipolar endoprostheses. The results were surgically confirmed in 12 patients. The contrast arthrogram was true positive in 5 and false negative in 5. There were no false positives and 2 true negatives. The nuclear arthrogram was true positive in 7 patients, false negative in 3, and true negative in 2. Taken together, there was only 1 patient in whom both contrast and nuclear arthrography were false negative, and there were no false positives. Thus, when either contrast or nuclear arthrography is positive, the sensitivity of the combined procedures is 90%; when both studies are negative, the specificity is 100%. The combination of contrast and nuclear arthrography is an accurate method of determining loosening of the femoral component of an uncemented hip arthroplasty or bipolar endoprosthesis in the patient with postoperative hip pain.

CLINICAL NUCLEAR MEDICINE.
“Aseptic Loosening of a Knee Prosthesis as Imaged on FDG Positron Emission Tomography.”  25.11 (2000): 923–923.

uptake in aseptic loosening of a knee prosthesis

AB - Some complications of joint replacement surgery are easily diagnosed; however, differentiating infection from aseptic loosening is difficult because these entities are remarkably similar at clinical and histopathologic examination. Clinical signs and symptoms, laboratory tests, radiography, and joint aspiration are insensitive, nonspecific, or both. Cross-sectional imaging modalities are hampered by artifacts produced by the prosthetic devices themselves. Radionuclide imaging is not affected by the presence of metallic hardware and is therefore useful for evaluating the painful prosthesis. Bone scintigraphy is useful as a screening test, despite an accuracy of only 50%-70%, because normal results essentially exclude a prosthetic complication. The addition of gallium-67, a nonspecific inflammation-imaging agent, improves the accuracy of bone scintigraphy to 70%-80%. The accuracy of combined leukocyte-marrow imaging, 90%, is the highest among available radionuclide studies. Its success is due to the fact that leukocyte imaging is most sensitive for detection of neutrophil-mediated inflammation (ie, infection). The success of leukocyte-marrow imaging is tempered by the limitations of in vitro labeling. In vivo labeling has been investigated, and a murine monoclonal antigranulocyte antibody appears promising. Some investigations have focused on fluorodeoxyglucose imaging. Although this method is sensitive, specificity is a concern.

“Aseptic Loosening of a Knee Prosthesis as Imaged on FDG Positron Emission Tomography.”  25 (11): 923–923.

Imaging prosthetic joints in nuclear medicine ..

The recent popularity of ingrowth or uncemented hip arthroplasties has presented problems in the radiographic diagnosis of loosening because there is no longer a cement interface in which lucencies may be seen. We evaluated a combination of positive contrast and nuclear arthrography to see whether these studies could accurately detect loosening of uncemented femoral components of hip prostheses. We performed routine contrast and nuclear arthrography in 21 patients with ingrowth total hip arthroplasties or bipolar endoprostheses. The results were surgically confirmed in 12 patients. The contrast arthrogram was true positive in 5 and false negative in 5. There were no false positives and 2 true negatives. The nuclear arthrogram was true positive in 7 patients, false negative in 3, and true negative in 2. Taken together, there was only 1 patient in whom both contrast and nuclear arthrography were false negative, and there were no false positives. Thus, when either contrast or nuclear arthrography is positive, the sensitivity of the combined procedures is 90%; when both studies are negative, the specificity is 100%. The combination of contrast and nuclear arthrography is an accurate method of determining loosening of the femoral component of an uncemented hip arthroplasty or bipolar endoprosthesis in the patient with postoperative hip pain.

Contrast and nuclear arthrography in loosening of the uncemented hip prosthesis

The Hip Prosthesis Loosening Nuclear Medicine Hip …