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Renal resistive index (RRI) is calculated from ultrasonographic Doppler measurements of flow velocities in intraparenchymal renal arteries. Normal values are around 0.60, and 0.70 is considered the upper normal threshold in adults. Both preoperative and postoperative elevation of RRI has shown promise in early detection of AKI after cardiac surgery. Further, elevated RRI before coronary angiography is associated with an increased risk of cardiovascular complications up to 1 year after the procedure. The role of preoperative RRI in predicting long-term renal and cardiovascular complications after elective surgery is however not known. The aim of this study is to assess the role of preoperative RRI to predict the risk of persistent renal dysfunction as well as renal- and cardiovascular complications up to 5 years after surgery.
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| Measure | Description | Time Frame |
|---|---|---|
| Long-term renal dysfunction | Reduced estimated glomerular filtration rate (eGFR) ≥25% from baseline | 5 years after surgery or end of follow-up |
| Measure | Description | Time Frame |
|---|---|---|
| Short-term renal dysfunction | Reduced eGFR ≥25% from baseline | 30 days after surgery |
| Intermediate renal dysfunction | Reduced eGFR ≥25% from baseline |
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Inclusion Criteria:
Exclusion Criteria:
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Elective cardiac surgery patients
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| Name | Affiliation | Role |
|---|---|---|
| Daniel Hertzberg, M.D. | Department of Perioperative Medicine and Intensive Care, Karolinska University Hospital | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Karolinska University Hospital | Stockholm | Sweden |
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| ID | Term |
|---|---|
| D058186 | Acute Kidney Injury |
| D051436 | Renal Insufficiency, Chronic |
| ID | Term |
|---|---|
| D051437 | Renal Insufficiency |
| D007674 | Kidney Diseases |
| D014570 | Urologic Diseases |
| D052776 | Female Urogenital Diseases |
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| 90 days after surgery |
| Major adverse kidney events (MAKE) | Composite outcome during follow-up time including one of; death, renal replacement therapy, reduced eGFR ≥25% from baseline | 30 days, 90 days, 1 year, and 5 years after surgery or end of follow-up |
| Major adverse cardiac and cerebrovascular events (MACCE) | Composite outcome during follow-up time including one of; death, myocardial infarction, heart failure, stroke | 30 days, 90 days, 1 year, and 5 years after surgery or end of follow-up |
| D005261 |
| Female Urogenital Diseases and Pregnancy Complications |
| D000091642 | Urogenital Diseases |
| D052801 | Male Urogenital Diseases |
| D002908 | Chronic Disease |
| D020969 | Disease Attributes |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |