In 2017, End Stage Renal Disease (ESRD) affected 746,557 people in the United States, with 86.9% beginning renal replacement therapy through hemodialysis (HD). This requires an access for dialysis, through arteriovenous (AV) fistula. Digital pressure, a measurement of blood flow, was identified by Schanzer as a tool to diagnosis ischemia in AV fistula patients.  This retrospective study aims to use digital pressure data measurement to identify a threshold value of digital pressure prior to fistula placement that will predict ischemia after hemodialysis access placement and use. 

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Sarah Lyon

TCU School of Medicine

The obturator bypass was initially employed to avoid the infected groin during revascularization. As the procedure is generally safe, this extraanatomic bypass may be used to circumvent a variety of obstacles that preclude a standard revascularization procedure. Therefore, the technique should be inlaced in the armamentarium of the vascular surgeon.

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Samuel S. Ahn, Eric Daniels

We aimed to compare the safety and efficacy of 5 arterial closure devices in an outpatient endovascular surgery center.

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Lauren E. Jones, Keun Ho Yang, Robert W. Feldtman, Pablo V. Uceda, Craig A. Ferrara, Joseph M. Caruso, Jasmine L. Richmond, Samuel S. Ahn

Classically, the internal jugular vein is not considered to be under the same anatomic constraints because the axillary subclavian vein in TOS and the phenomena of central venous compression have not been thoroughly explored in patients with TOS. We, thus, undertook this prospective study to determine the incidence of internal jugular vein stenosis in these patients

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Samuel S. Ahn, Travis J. Miller, Sheena W. Chen, Julia F. Chen

The office-based endovascular facility has increased in number recently due in part to expedient patient experience. This study analyzed treatment outcomes of procedures performed in our office-based endovascular suite.

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Peter H. Lin, Keun Ho Yang, Kenneth R. Kollmeyer, Pablo V. Uceda, Craig A. Ferrara, Robert W. Feldtman, Joseph Caruso, Karen Mcquade, Jasmine L. Richmond, Cameron E. Kliner, Kaitlyn E. Egan, Walter Kim, Marius Saines, Rhoda Leichter, Samuel S. Ahn

In this paper, the development of endovascular surgery at the University of California at Los Angeles (UCLA) between 1985 and 1990 is described. Experience with atherectomy began in 1985 with studies using the Rotablator. The need for a method of imaging the results of endovascular procedures was recognised at an early stage and purpose-made angioscopic equipment was developed. Although this equipment allowed direct visualisation of luminal topography, it led to over-treatment without producing improved long-term patency.

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Samuel S. Ahn, Wesley S. Moore

Subclavian vein and brachiocephalic vein occlusions are challenging problems in dialysis patients with ipsilateral upper extremity (UE) vascular access or in need of one. HeRO grafts (Hemodialysis Reliable Outflow, Merit Medical Systems, Inc, South Jordan, UT) have been used to manage such occlusions but patients with chronic hypotension treated with HeRO graft may have threatened patency. We describe an alternative technique using a supraclavicular stent graft to reconstruct the venous outflow, evaluate outcomes of this procedure, and discuss its role in complex hemodialysis patients.

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Pablo V. Uceda, Robert W. Feldtman, Samuel  S. Ahn

In this report, various concerns and pitfalls of office-based interventional vascular centers are discussed. Strategies to improve patient care delivery in office-based laboratories including accreditations which serve as external validation of processes to ensure patient care and safety are also mentioned. Finally, the requirements to obtain accreditation in an office-based practice and the differences between these nationally recognized accrediting organizations are discussed herein.

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Peter H. Lin, Fiona A. Chandra, Fred E. Shapiro, Brian M. Osman, Richard D. Urman, Samuel S. Ahn

This retrospective study identifies often overlooked anatomical sites for nonthrombotic venous outflow obstruction (NTVO) in patients with unexplained lower extremity edema and pain.

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Alaina Garrie, Lauren E. Jones, Julia F. Chen, Robert W. Feldtman, Kenneth R. Kollmeyer, Jasmine L. Richmond, Craig A. Ferrara, Pablo V. Uceda, Lelesse Mocio, Samuel S. Ahn

The radial artery is often used for coronary angiography, with demonstrated decrease in local complications and an increase in postoperative patient mobility. However, data on radial artery access for peripheral endovascular procedures are limited. We describe herein our experience with radial artery access for diagnostic and endovascular interventions.

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Samuel S. Ahn, Avnee J. Kumar, Michele N. Moe, Julia F. Chen

Previous experience has shown that investigators, left on their own, may report their results in a variety of ways, which make comparison of one report to the other difficult, if not impossible. Consequently, to provide valid comparisons among reported results of endovascular management methods for abdominal aortic aneurysm, disease, the following guidelines are recommended by this article.

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Samuel S. Ahn, Robert B. Rutherford, K. Wayne Johnston, James May, Frank J. Veith, J. Dennis Baker, Calvin B. Ernst, Wesley S. Moore

We have developed the life-size Endovascular Training Model, which can be used to practice various endovascular procedures. We present this model as a useful educational tool in vascular surgery CME courses.

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Samuel S. Ahn, Wesley S. Moore, Terry L. Kaiura, Martin D. Shickman