Clinical trial NCT03048890: VascTrac Peripheral Arterial Disease (PAD) Study
Official title: VascTrac PAD ResearchKit Study
Study type: OBSERVATIONAL
Overall status: UNKNOWN
Conditions: Peripheral Artery Disease
Intermittent Claudication
Keywords: PAD
Lead sponsor: Palo Alto Veterans Institute for Research
Sponsor class: OTHER
Collaborators: name: W.L.Gore & Associates
name: Abbott
name: Cook Group Incorporated
name: Boston Scientific Corporation
First posted: 2017-02-09
Enrollment: 2000
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: All adults with an iPhone 5s or higher who can read English

Brief summary: VascTrac is a mobile medical application that tracks users' physical activity levels in order to predict endovascular failure of patients with Peripheral Artery Disease.

Detailed description: VascTrac uses open-source software from Apple's ResearchKit to passively track physical activity levels of users who sign up. The goal is to predict post-intervention endovascular failure before it occurs. Currently, physicians have no way of knowing when procedures such as angioplasties fail; with VascTrac, researchers hope to find downward trends in physical activity that will predict and indicate endovascular failure. All users are assigned numbers and their medical data is securely coded, decreasing the risk of promulgation of personal information.

Eligibility criteria: Inclusion Criteria:

* adult, has iPhone 5s, can read English

Exclusion Criteria:

* under 18 years

Primary outcomes:
measure: Physical Activity
timeFrame: Two Years
Secondary outcomes:
Other outcomes:
Locations:
city: Palo Alto
country: United States
facility: VA Palo Alto Health Care System
state: California
Study officials:
affiliation: Stanford University
name: Oliver O Aalami, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Cunningham MA, Swanson V, Pappas E, O'Carroll RE, Holdsworth RJ. Illness beliefs and walking behavior after revascularization for intermittent claudication: a qualitative study. J Cardiopulm Rehabil Prev. 2014 May-Jun;34(3):195-201. doi: 10.1097/HCR.0000000000000046.
citation: Carter T, O'Neill S, Johns N, Brady RR. Contemporary vascular smartphone medical applications. Ann Vasc Surg. 2013 Aug;27(6):804-9. doi: 10.1016/j.avsg.2012.10.013. Epub 2013 Mar 25.
citation: Coughlin PA, Kent PJ, Turton EP, Byrne P, Berridge DC, Scott DJ, Kester RC. A new device for the measurement of disease severity in patients with intermittent claudication. Eur J Vasc Endovasc Surg. 2001 Dec;22(6):516-22. doi: 10.1053/ejvs.2001.1528.
citation: Gernigon M, Le Faucheur A, Fradin D, Noury-Desvaux B, Landron C, Mahe G, Abraham P. Global positioning system use in the community to evaluate improvements in walking after revascularization: a prospective multicenter study with 6-month follow-up in patients with peripheral arterial disease. Medicine (Baltimore). 2015 May;94(18):e838. doi: 10.1097/MD.0000000000000838.
citation: Afaq A, Patel JH, Gardner AW, Hennebry TA. Predictors of change in walking distance in patients with peripheral arterial disease undergoing endovascular intervention. Clin Cardiol. 2009 Sep;32(9):E7-11. doi: 10.1002/clc.20553.
citation: Malgor RD, Alahdab F, Elraiyah TA, Rizvi AZ, Lane MA, Prokop LJ, Phung OJ, Farah W, Montori VM, Conte MS, Murad MH. A systematic review of treatment of intermittent claudication in the lower extremities. J Vasc Surg. 2015 Mar;61(3 Suppl):54S-73S. doi: 10.1016/j.jvs.2014.12.007. Epub 2015 Feb 23.
citation: Murphy TP, Hirsch AT, Ricotta JJ, Cutlip DE, Mohler E, Regensteiner JG, Comerota AJ, Cohen DJ; CLEVER Steering Committee. The Claudication: Exercise Vs. Endoluminal Revascularization (CLEVER) study: rationale and methods. J Vasc Surg. 2008 Jun;47(6):1356-63. doi: 10.1016/j.jvs.2007.12.048. Epub 2008 Apr 25.
citation: Murphy TP, Cutlip DE, Regensteiner JG, Mohler ER, Cohen DJ, Reynolds MR, Massaro JM, Lewis BA, Cerezo J, Oldenburg NC, Thum CC, Goldberg S, Jaff MR, Steffes MW, Comerota AJ, Ehrman J, Treat-Jacobson D, Walsh ME, Collins T, Badenhop DT, Bronas U, Hirsch AT; CLEVER Study Investigators. Supervised exercise versus primary stenting for claudication resulting from aortoiliac peripheral artery disease: six-month outcomes from the claudication: exercise versus endoluminal revascularization (CLEVER) study. Circulation. 2012 Jan 3;125(1):130-9. doi: 10.1161/CIRCULATIONAHA.111.075770. Epub 2011 Nov 16.
citation: Murphy TP, Hirsch AT, Cutlip DE, Regensteiner JG, Comerota AJ, Mohler E, Cohen DJ, Massaro J; CLEVER Investigators. Claudication: exercise vs endoluminal revascularization (CLEVER) study update. J Vasc Surg. 2009 Oct;50(4):942-945.e2. doi: 10.1016/j.jvs.2009.04.076. Epub 2009 Aug 5.