Quantifizierung von A. carotis interna-Stenosen: Welche Ultraschallkriterien sind geeignet?
| Autor: | L Lachenmayer, E. Hammer, H Hahm, C Arning, A Müller-Jensen, H Kortmann |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
medicine.medical_specialty
business.industry medicine.medical_treatment Ultrasound Hemodynamics Arteriotomy medicine.disease Stenosis medicine.artery medicine Radiology Nuclear Medicine and imaging Radiology Internal carotid artery medicine.symptom business Reference standards Confusion Endarterectomy |
| Zdroj: | Ultraschall in der Medizin. 24:233-238 |
| ISSN: | 1438-8782 0172-4614 |
| DOI: | 10.1055/s-2003-41711 |
| Popis: | UNLABELLED Therapeutic decisions in cases of arteriosclerotic stenosis of the internal carotid artery usually depend mainly on the degree of stenosis. However, the recommendations with regard to suitable ultrasonographic criteria are so controversial that even authors of repute describe "confusion" and "chaos in methodology". AIM The aim of this study is to assess which of the most frequently recommended sonographic criteria for stenosis best fulfill the requirements of an exact quantification of stenoses of the internal carotid artery. METHOD In 42 consecutive cases the preoperative ultrasound findings were compared with the degree of stenosis in surgically removed specimens. The sonographic technique employed consisted of the analysis of 2 direct and 3 indirect hemodynamic criteria of stenosis. In 34 of these cases planimetry was performed, too. The specimens were obtained by eversion thrombendarteriectomy or arteriotomy; for determination of the degree of stenosis a Paladur molded cylinder was prepared and measured. RESULTS Quantification of the haemodynamic criteria carries provided well with the endarterectomy specimens. Only in two cases there was a deviation of more than 10 %; however, in these two cases a change with time in the degree of stenosis was probably responsible for the discrepancy. In contrast, planimetry usually underestimated the degree of stenosis: In 61 % of the findings the ultrasonographic results differed by more than 10 % from the reference standard. CONCLUSION Quantification of stenosis of the internal carotid artery should be made using a combination of direct and indirect haemodynamic ultrasonographic criteria. |
| Databáze: | OpenAIRE |
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