PubMed Health⌕ Search

Biomedical subjects

R A Moyer

Publications and source records attributed to R A Moyer.

14 recordsLinked to original sources
PubMed1990

Pyogenic sacroiliitis in a rural population.

We describe 10 cases of pyogenic sacroiliitis occurring in a rural population. Seven were male and 3 were female with a mean age of 22.4 years. None was a recent intravenous drug abuser. Five patients had a history of recent pelvic trauma. 99mTechnetium scintiscans revealed increased sacroiliac (SI) joint uptake in 8 of 8 cases. Blood cultures were positive in 60% of patients. Staphylococcus aureus was isolated in 7 cases from blood and/or SI aspirates and Hemophilus influenzae type B in one case. Nine of 10 patients recovered completely. One underwent arthrodesis for recurrent SI pain without evidence of relapse of infection. Median followup was 18 months.

Adolescent↗
PubMed1990

Testing for isometry during reconstruction of the anterior cruciate ligament. Anatomical and biomechanical considerations.

Instrumented tibiofemoral (bone-to-bone) excursion wires were implanted in the mid-substance of the anteromedial, central, and posterior fiber-regions of the anterior cruciate ligament through limited anterior and posterior arthrotomies in eight fresh knees from cadavera. The change in the distance of linear separation between each pair of osseous fiber-insertion sites was measured and was plotted against the angle of flexion of the knee as the knee was cycled through a 120-degree range of motion. Testing conditions likely to be present during intraoperative testing for isometry were used (anterior cruciate fibers transected, quadriceps relaxed, femur stabilized with the patient in the supine position and the leg freely dependent, and motion of the knee induced in neutral rotation by force applied at the level of the foot). In no instance did the insertion-site centers of any fiber-region exhibit isometric behavior (change in the distance of linear separation of 1.0 millimeter or less). The least deviations from isometry (range, 1.4 to 3.1 millimeters) were observed for the anteromedial sites, under conditions when the gravitational dependency of the lower leg was constrained. When the leg hung in a dependent manner during passive motion, the deviation from isometry of the anteromedial sites of insertion increased significantly (range, 2.8 to 5.6 millimeters). The central sites of insertion were generally less isometric than the anteromedial sites, and the posterior sites were the least isometric, regardless of testing conditions.

Aged↗
PubMed1990

Prototheca wickerhamii tenosynovitis.

Prototheca wickerhamii is an algae-like organism rarely implicated in skin or soft tissue infections. We describe the first case (to our knowledge) of Prototheca tenosynovitis which followed median nerve release for carpal tunnel syndrome. Clinical presentation, operative findings, histopathology, microbiology and treatment of this unusual infection are discussed.

Amphotericin B↗
PubMed1989

Acute calcific tendinitis of the hand and wrist: a report of 12 cases and a review of the literature.

Acute calcific tendinitis is a frequently unrecognized cause of hand and wrist tenderness and swelling. We report 12 cases seen over an 8-year period. Roentgenograms showed deposits in various peritendinous sites especially near the pisiform. Special views may be required for visualization. A correct diagnosis was made in 5/12 cases; other etiologies considered included closed-space infections. In most cases, treatment consisted of immobilization plus nonsteroidal antiinflammatory drugs or local steroid injections. Results were uniformly good. Seven of 7 patients demonstrated resolution of calcium deposits on subsequent roentgenograms. Failure to recognize this entity may cause unnecessary investigation and therapy.

Adult↗
PubMed1987

Osteochondritis dissecans: analysis of mechanical stability with radiography, scintigraphy, and MR imaging.

Twenty-one joints with stable (n = 9) or loose (n = 12) osteochondritis dissecans (OCD) lesions were examined in 15 subjects with plain radiography, three-phase bone scintigraphy, and magnetic resonance (MR) imaging. The lesion size and the thickness of the sclerotic margin as measured on plain radiographs were good parameters for predicting loosening. However, bone scintigraphy was more sensitive and specific in determining the mechanical stability of OCD lesions. MR imaging permitted direct visualization of loosening and fragment displacement; the latter permits differentiation of in situ loosening from a grossly unstable lesion. The noninvasive nature of bone scintigraphy and MR imaging makes them potentially preferable diagnostic modalities to arthrography for evaluating the mechanical status of OCD lesions.

Adolescent↗
PubMed1984

Giant synovial cysts.

Giant synovial cysts (GSC) are large, well-defined cavities, containing synovial fluid and lined by a synovium-like membrane, which extend for a variable distance outside the joint cavity. We are reporting 15 cases of GSC of various joints. Rheumatoid arthritis is the most common disease process reported in association with GSC. We suggest that trauma may be a more important cause of GSC than has previously been described. Arthrography and ultrasonography are both helpful in diagnosing these large cysts, especially in the knee to aid in differentiating GSC from thrombophlebitis.

Adolescent↗
PubMed1975

Converging collimation and a large-field-of-view scintillation camera.

Three low-energy multihole converging collimators were evaluated in reference to accepted imaging parameters using a prototype large-field-of-view scintillation camera. A substantial improvement in resolution and/or sensitivity with depth was observed. Because of the large detector, the inherent reduction in field size due to convergence was not detrimental to satisfactory imaging of most target volumes. Such collimation should prove to be of significant clinical value.

Radionuclide Imaging↗