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  • 1
    Electronic Resource
    Electronic Resource
    Contribution of color and power Doppler sonography to the differential diagnosis of acute and chronic rejection, and tacrolimus nephrotoxicity in renal allografts (1999)
    Springer
    Transplant international 12 (1999), S. 127-134 
    Details
    ISSN: 1432-2277
    Keywords: Key words Doppler sonography ; Acute rejection ; Chronic rejection ; Tacrolimus ; Kidney transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of the present study was to differentiate acute rejection, chronic rejection, and tacrolimus nephrotoxicity with color and power Doppler imaging of renal transplants. One hundred examinations were obtained from 45 patients. Pulsatility and resistive indices were calculated from color Doppler images. The grade of renal vascularization was quantified using computer-assisted pixel analysis in a rectangular region-of-interest. The percentage of vessel-covered renal parenchyma (POV) was calculated using a histogram that discriminated renal vessels from renal parenchyma via power Doppler images. Furthermore, the distance from the most peripherally located vessels to the renal capsule (PVD) was measured. A reduced POV K 55 % proved to be the best discriminator when chronic rejection was suspected (sensitivity 79 %, specificity 87 %). Tacrolimus nephrotoxicity showed not only a moderate elevation of the Doppler signal but also an increased PVD L 3.9 mm and a normal POV. We conclude that the evaluation of renal vessels by power Doppler images improves diagnostic accuracy for patients with renal allografts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001470050197
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  • 2
    Electronic Resource
    Electronic Resource
    A new ultrasound-based method for the assessment of torsional differences following closed intramedullary nailing of femoral fractures (1999)
    Springer
    Skeletal radiology 28 (1999), S. 336-341 
    Details
    ISSN: 1432-2161
    Keywords: Key words Femoral torsion ; Torsional difference ; Ultrasound ; Femoral fractures ; Anterior condylar line
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. A torsional difference of more than 15° is found in up to 30% of patients following closed intramedullary nailing of femoral fractures. The diagnosis is usually established postoperatively by computed tomography. A torsional deformity of more than 15° should be corrected by early derotation. In order to enable an intraoperative control and possible correction to avoid a second operation for the patient, a new ultrasound-based method suitable for the intraoperative setting has been developed, using the anterior condylar line as a distal reference line. Design and patients. In a prospective study the torsional difference after closed intramedullary nailing of femoral fractures was measured postoperatively by ultrasound in 32 patients and compared with standard CT readings. Results. Torsional differences measured by ultrasound and CT showed a high correlation (r=0.8) and a median difference of less than ±3°. Conclusions. By the introduction of the anterior condylar line as a distal reference line femoral torsion can accurately be assessed by ultrasound in a position required for intraoperative control and possible correction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002560050527
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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