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The Capital Region of Denmark - a part of Copenhagen University Hospital
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Blood flow measurements during hemodialysis vascular access interventions - Catheter-based thermodilution or Doppler ultrasound?

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DOI

  1. Surveillance for hemodialysis access stenosis: usefulness of ultrasound vector volume flow

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Rating scale for the assessment of competence in ultrasound-guided peripheral vascular access - a Delphi Consensus Study

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  3. Current use of ultrasound for central vascular access in children and infants in the Nordic countries--a cross-sectional study

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  4. Catheter-based flow measurements in hemodialysis fistulas - Bench testing and clinical performance

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  5. Endovascular treatment of hemodialysis arteriovenous fistulas: is immediate post-interventional blood flow a predictor of patency

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Purpose: To test the clinical performance of catheter-based thermodilution and Doppler ultrasound of the feeding brachial artery for blood flow measurements during hemodialysis vascular access interventions.Methods: Thirty patients with arteriovenous fistulas who underwent 46 interventions had access blood flow measured before and after every procedure. Two methods, catheter-based thermodilution and Doppler ultrasound, were compared to the reference method of ultrasound dilution. Catheter-based thermodilution and Doppler ultrasound were performed during the endovascular procedures while flow by ultrasound dilution was determined within three days of the procedure. The methods were compared using regression analysis and tested for systematic bias. Results: Failure to position the thermodilutional catheter correctly was observed in 8 out of 46 (17%) pre-intervention measurements. Post-intervention measurements and ultrasound measurements were feasible in all patients. The average level of agreement was good when comparing catheter-based thermodilution to ultrasound dilution. However, blood flow by ultrasound dilution may differ by ±130 mL/min (±22%) at a flow level of 600 mL/min by thermodilution. Results from Doppler ultrasound displayed a moderate level of agreement on average when compared to ultrasound dilution. Blood flow by ultrasound dilution may differ by ±160 mL/min (±27%) at a flow level of 600 mL/min by Doppler ultrasound. No systematic bias was detected by either method.Conclusions: On average, results from catheter-based thermodilution were more in agreement with results from the ultrasound dilution technique compared to Doppler ultrasound. However, considering the cost and the high technical failure rate of the thermodilutional system, we recommend the use of ultrasound.
Original languageEnglish
JournalThe journal of vascular access
Volume13
Issue number2
Pages (from-to)145-151
Number of pages7
DOIs
Publication statusPublished - 2012

ID: 33173544