RESUMEN
In-111-oxine-labeled leukocyte imaging was performed on twenty-one patients suspected of having bone infection. Nine of eleven cases (82%) were diagnosed as having active infection as demonstrated by abnormal accumulation of In-111-labeled leukocytes at the site of infection. There are two false negative (18%) cases. Two cases without active infection showed abnormal uptake. Four cases revealed cold defects on the scintigraphy. Marked uptake of radiotracer was noted not only in the case of acute osteomyelitis with acute septicaemia but also in the case with persistent chronic active osteomyelitis. It was observed that for precise evaluation of the test results it was equally important to compare the imaging findings with physical signs and laboratory investigations. It is concluded that In-111-oxine-labeled leukocyte imaging is a useful tool for the evaluation of the progression of bone infection.
Asunto(s)
Huesos/diagnóstico por imagen , Radioisótopos de Indio , Leucocitos , Osteomielitis/diagnóstico por imagen , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Falla de Prótesis/diagnóstico por imagen , CintigrafíaRESUMEN
The authors examined the relationships among Tc-99m radionuclide bone scan findings, pain, and radiolucent lines in 35 postsurgical knees. Our prospective study included bone scans, as well as radiographic and clinical examination three, seven, and 12 months after knee replacement surgery in 35 patients. Twenty-seven patients had no pain 12 months after surgery and eight patients had moderate or severe pain. Prosthetic loosening was seen in one patient. Thirty-three patients exhibited a radiolucent line under the tibial part of the prosthesis. Isotope uptake was the same in the painful and nonpainful knees, and the degree of isotope uptake did not correlate with the development of radiolucent lines around the prosthetic components.
Asunto(s)
Prótesis de la Rodilla , Dolor/etiología , Anciano , Femenino , Fémur/diagnóstico por imagen , Humanos , Masculino , Persona de Mediana Edad , Rótula/diagnóstico por imagen , Estudios Prospectivos , Falla de Prótesis/diagnóstico por imagen , Cintigrafía , Medronato de Tecnecio Tc 99m , Tibia/diagnóstico por imagenRESUMEN
A prospective study was performed with 97 patients who had undergone total hip replacement surgery and who were not experiencing pain or other symptoms or problems. The study was intended to determine the normal postoperative appearance of radionuclide scans of the hip following administration of technetium-99m methylene diphosphonate. Five areas of the prostheses were evaluated. Results showed that 6 months after implantation activity around the lesser trochanter and prosthesis shaft became insignificant. Activity around the acetabulum, greater trochanter, and prosthesis tip stabilized approximately 2 years after surgery; approximately 10% of patients in the study had persistent activity in these areas. Familiarity with this normal progression is fundamental to interpretation of postoperative bone scans in patients with total hip prosthesis.