scholarly journals Utility of Toe-brachial Index for Diagnosis of Peripheral Artery Disease

2012 ◽  
Vol 39 (3) ◽  
pp. 227 ◽  
Author(s):  
Seong Chul Park ◽  
Chang Yong Choi ◽  
Young In Ha ◽  
Hyung Eun Yang
Keyword(s):  
Peripheral Artery Disease ◽  
Peripheral Artery ◽  
Toe Brachial Index ◽  
Artery Disease

scholarly journals Ankle and Toe Brachial Index Extraction from Clinical Reports For Peripheral Artery Disease Identification: Unlocking Clinical Data through Novel Methods

2021 ◽  
Author(s):  
Julia E Friberg ◽  
Abdul H Qazi ◽  
Brenden Boyle ◽  
Carrie Franciscus ◽  
Mary Vaughan-Sarrazin ◽  
...  
Keyword(s):  
Positive Predictive Value ◽  
Random Sample ◽  
Health Systems ◽  
Peripheral Artery Disease ◽  
Predictive Value ◽  
Health Administration ◽  
Peripheral Artery ◽  
Left Limb ◽  
Toe Brachial Index ◽  
Artery Disease

ABSTRACT Importance: Despite its high prevalence and poor outcomes, research on peripheral artery disease (PAD) remains limited due to the poor accuracy of billing codes for identifying PAD in health systems. Objective: Design a natural language processing (NLP) system that can extract ankle brachial index (ABI) and toe brachial index (TBI) values and evaluate the performance of extracted ABI/TBI values to identify patients with PAD in the Veterans Health Administration (VHA). Design, Setting, Participants: From a corpus of 392,244 ABI test reports at 94 VHA facilities during 2015-2017, we selected a random sample of 800 documents for NLP development. Using machine learning, we designed the NLP system to extract ABI and TBI values and laterality (right or left). Performance was optimized through sequential iterations of 10-fold cross validation and error analysis on 3 sets of 200 documents each, and tested on a final, independent set of 200 documents. Performance of NLP-extracted ABI and TBI values to identify PAD in a random sample of Veterans undergoing ABI testing was compared to structured chart review. Exposure: ABI <0.9, or TBI <0.7 in either right or left limb used to define PAD at the patient-level Main Outcome: Precision (or positive predictive value), recall (or sensitivity), F-1 measure (overall measure of accuracy, defined as harmonic mean of precision and recall) Results: The NLP system had an overall precision of 0.85, recall of 0.93 and F1-measure of 0.89. The F-1 measure was similar for both ABI and TBI (0.88 to 0.91). Recall was higher for ABI (0.95 to 0.97) while precision was higher for TBI (0.94 to 0.95). Among 261 patients with ABI testing (49% with PAD), the NLP system was able to extract ABI and TBI values in 238 (91.2%) patients. The NLP system had a positive predictive value of 92.3%, sensitivity of 89.3% and specificity of 92.3% to identify PAD. Conclusion: We have successfully developed and validated an NLP system to extract ABI and TBI values which can be used to accurately identify PAD within the VHA. Our findings have broad implications for PAD research and quality improvement efforts in large health systems.

scholarly journals Bilateral low systolic toe pressure and toe-brachial index are associated with long-term mortality in patients with peripheral artery disease

2019 ◽  
Vol 70 (6) ◽  
pp. 1994-2004 ◽  
Author(s):  
Jan-Erik Wickström ◽  
Juha Virtanen ◽  
Ellinoora Aro ◽  
Juho Jalkanen ◽  
Maarit Venermo ◽  
...  
Keyword(s):  
Peripheral Artery Disease ◽  
Peripheral Artery ◽  
Toe Brachial Index ◽  
Artery Disease ◽  
Toe Pressure ◽  
Long Term Mortality

Toe-brachial index and exercise test can improve the exploration of peripheral artery disease

2018 ◽  
Vol 269 ◽  
pp. 151-158 ◽  
Author(s):  
David Kovacs ◽  
Beata Csiszar ◽  
Katalin Biro ◽  
Katalin Koltai ◽  
Dora Endrei ◽  
...  
Keyword(s):  
Peripheral Artery Disease ◽  
Exercise Test ◽  
Peripheral Artery ◽  
Toe Brachial Index ◽  
Artery Disease

Multimodal Supervised Exercise Significantly Improves Walking Performances Without Changing Hemodynamic Parameters in Patients With Symptomatic Lower Extremity Peripheral Artery Disease

2020 ◽  
Vol 54 (7) ◽  
pp. 605-611
Author(s):  
Luca Calanca ◽  
Stefano Lanzi ◽  
Barbara Ney ◽  
André Berchtold ◽  
Lucia Mazzolai
Keyword(s):  
Lower Extremity ◽  
Peripheral Artery Disease ◽  
Walking Distance ◽  
Hemodynamic Parameters ◽  
Peripheral Artery ◽  
Transcutaneous Oxygen ◽  
Supervised Exercise ◽  
Transcutaneous Oxygen Pressure ◽  
Toe Brachial Index ◽  
Artery Disease

We evaluated the outcome of multimodal supervised exercise training (SET) on walking performances and different hemodynamic parameters (ankle/toe-brachial index [ABI/TBI], and transcutaneous oxygen pressure [TcPO2]) in patients with symptomatic lower extremity peripheral artery disease (PAD). Whether hemodynamic parameters predict walking performances at baseline and following SET was also investigated. Fontaine stage II PAD’s patients following a 3-month SET were retrospectively included. Hemodynamic parameters and walking performances (pain-free [PFWD], maximal [MWD], and 6-minute [6MWD] walking distance) were measured in each patient. Eighty-five symptomatic PAD patients were included. Following SET, PFWD, MWD, and 6MWD significantly increased (+142%, +94%, +14%; respectively; P ≤ .001). Toe-brachial index significantly increased (MD: 0.04 ± 0.01; P = .02), whereas ABI and TcPO2 did not change significantly. At baseline, patients with higher TBI and TcPO2 performed significantly better (PFWD: β = 0.25, P = .01 for TBI; PFWD: β = 0.30, P = .005, and MWD: β = 0.22, P = .04, for TcPO2). No significant relationship was observed at baseline between ABI and walking performances. Baseline values of hemodynamic parameters did not significantly correlate with changes in walking performances. Multimodal SET significantly improves walking performances. Following SET, no significant changes in ABI and TcPO2 were observed. Toe-brachial index values significantly improved after SET. However, this increase was very modest and its clinical relevance remains questionable. Although baseline TBI and supine TcPO2 values predict baseline walking performances, no association was found between baseline hemodynamic parameters and changes in walking performances following SET.

Associations of coronary and peripheral artery disease with presence, expansion, and rupture of abdominal aortic aneurysm – a grin without a cat!

VASA ◽  
2017 ◽  
Vol 46 (3) ◽  
pp. 151-158 ◽  
Author(s):  
Hisato Takagi ◽  
Takuya Umemoto
Keyword(s):  
Abdominal Aortic Aneurysm ◽  
Aortic Aneurysm ◽  
Peripheral Artery Disease ◽  
Literature Search ◽  
Systematic Literature Search ◽  
Peripheral Artery ◽  
Epidemiological Evidence ◽  
Abdominal Aortic ◽  
Artery Disease ◽  
Meta Analyses

Abstract. Both coronary and peripheral artery disease are representative atherosclerotic diseases, which are also known to be positively associated with presence of abdominal aortic aneurysm. It is still controversial, however, whether coronary and peripheral artery disease are positively associated with expansion and rupture as well as presence of abdominal aortic aneurysm. In the present article, we overviewed epidemiological evidence, i. e. meta-analyses, regarding the associations of coronary and peripheral artery disease with presence, expansion, and rupture of abdominal aortic aneurysm through a systematic literature search. Our exhaustive search identified seven meta-analyses, which suggest that both coronary and peripheral artery disease are positively associated with presence of abdominal aortic aneurysm, may be negatively associated with expansion of abdominal aortic aneurysm, and might be unassociated with rupture of abdominal aortic aneurysm.

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