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Vascular dialysis access flow measurement: early intervention through early detection
Susana San Miguel1, Josephine Chow
1Area Renal Service, Western Zone, Sydney South West Area Health Service, Sydney, Australia. Susana.Sanmiguel@sswahs.nsw.gov.au
Journal of Renal Care
|November 14, 2009
Summary
The Fresenius BTM thermodilution method effectively detects poor dialysis access flow in haemodialysis patients, enabling early intervention for vascular access thrombosis or stenosis.
Area of Science:
- Nephrology
- Vascular Surgery
- Medical Devices
Background:
- Haemodialysis relies on functional vascular access (arteriovenous fistula/graft).
- Thrombosis and stenosis are common complications reducing access efficacy.
- Early detection of access flow issues is crucial for timely intervention.
Purpose of the Study:
- To evaluate the effectiveness of thermodilution (Fresenius BTM) for detecting haemodialysis access flow problems.
- To assess the utility of thermodilution in predicting thrombosis or stenosis.
- To facilitate early intervention for improved patient outcomes.
Main Methods:
- Prospective observational quality project over 12 months.
- Included 165 haemodialysis patients with permanent vascular access (AVF/AVG).
- Utilized Fresenius BTM thermodilution for online access flow measurement.
Main Results:
- 36 patients (21.8%) showed poor dialysis access flow.
- Defined poor flow as <200 ml/min (AVF) or <600 ml/min (AVG), or a 25% decrease.
- Doppler ultrasound confirmed significant stenosis in these patients.
Conclusions:
- Thermodilution (Fresenius BTM) is a reliable method for detecting poor dialysis access flow.
- This technique is comparable to other methods for assessing vascular access.
- Effective for early identification of potential access complications.
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