Accuracy of decrease in blood flow in predicting hemodialysis graft thrombosis
| Autor: | Carolyn G. Birk, Jack Work, Shelley R. Martin, Sunanda J. Ram, William D. Paulson, Mary Zapczynski |
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| Rok vydání: | 2000 |
| Předmět: |
Male
medicine.medical_specialty Mean arterial pressure medicine.medical_treatment Blood Pressure Sensitivity and Specificity Arteriovenous Shunt Surgical Renal Dialysis Risk Factors Blood vessel prosthesis medicine Humans False Positive Reactions Prospective Studies Prospective cohort study Polytetrafluoroethylene Ultrasonography Receiver operating characteristic business.industry Graft Occlusion Vascular Area under the curve Thrombosis Middle Aged medicine.disease Blood Vessel Prosthesis Blood pressure ROC Curve Regional Blood Flow Nephrology Area Under Curve Female Radiology Hemodialysis business Nuclear medicine Follow-Up Studies Forecasting |
| Zdroj: | American Journal of Kidney Diseases. 35:1089-1095 |
| ISSN: | 0272-6386 |
| Popis: | We recently showed that a single low graft blood-flow measurement (Qa) does not accurately predict graft thrombosis. In this study, we prospectively determined whether percentage of decrease in Qa (DeltaQa) or adjustment of Qa for mean arterial pressure (Qa/MAP; Delta(Qa/MAP)) provides greater predictive accuracy than a single Qa. We monitored 83 grafts from 80 patients for thrombosis over periods up to 12 months. Qa (by ultrasound dilution) and MAP were measured monthly during the study. Receiver operating characteristic curves were used to determine whether Qa, DeltaQa, Qa/MAP, or Delta(Qa/MAP) provided the combination of high sensitivity (>80%) and low false-positive rate (FPR |
| Databáze: | OpenAIRE |
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