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Assessing Ankle-Brachial Index (ABI) by using automated oscillometric devices
1Cardioclínica Araçatuba, Araçatuba, SP - Brasil. takaok@terra.com.br
Arquivos Brasileiros De Cardiologia
|June 3, 2008
Summary
An automated oscillometric device effectively measured Ankle-Brachial Index (ABI) in most patients. Elevated delta-brachial-brachial (delta-BB) and delta-ABI values indicate higher cardiovascular risk, suggesting their utility as new markers.
Area of Science:
- Cardiovascular Medicine
- Diagnostic Technology
- Biomedical Engineering
Background:
- Ankle-Brachial Index (ABI) assessment is crucial but underperformed due to Doppler Ultrasonic (DU) technique difficulties.
- An automated oscillometric device (AOD) offers a potential solution for easier ABI measurement.
Purpose of the Study:
- To evaluate the efficacy of an AOD for ABI assessments.
- To explore delta-brachial-brachial (delta-BB) and delta-ABI as novel cardiovascular risk markers.
Main Methods:
- Observational study of 247 patients using two AOD devices for simultaneous arterial blood pressure (ABP) measurements.
- ABI calculated, with DU technique used when leg ABP measurement was not feasible.
- Patients categorized into normal (Group N) or abnormal (Group A) ABI groups; delta-BB and delta-ABI calculated and compared.
Main Results:
- ABI determination was successful in 90.7% of patients.
- Reference values for delta-BB (0-8 mmHg) and delta-ABI (0-0.13) were established from Group N.
- Group A showed significantly higher prevalence of elevated delta-ABI (OR=25.23) and delta-BB (OR=8.95) compared to Group N.
Conclusions:
- AOD is effective for ABI measurement in a majority of patients.
- Elevated delta-BB and delta-ABI values are more common in patients with abnormal ABI.
- Further epidemiological studies are recommended to validate delta-BB and delta-ABI as cardiovascular disease markers.
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