Publications by authors named "Nicholas J Morrissey"

Objective: The frequency of atherectomy in lower extremity arterial disease has increased substantially over the past several years, specifically in the office-based laboratory (OBL) setting, yet the efficacy compared with other interventions and the consequences of distal embolization remain unknown. Embolic protection devices (EPDs) have been used at varying rates depending on physician and practice setting. Previous studies have described lesion characteristics to consider when weighing the benefits and drawbacks associated with device use.

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Objective: Postoperative outcomes following carotid revascularization are understudied in Asian patients. We aimed to assess whether disease severity and postoperative outcomes following carotid revascularization differ between Asian and White patients, and whether this varies with Asian procedure density.

Methods: We analyzed the Vascular Quality Initiative Carotid Endarterectomy and Carotid Artery Stenting datasets from 2003 to 2021.

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Objective: The nature of peripheral arterial disease and postoperative outcomes are understudied in Asian patients. We aimed to determine if there are disparities in disease severity at the time of presentation and postoperative outcomes with regard to Asian race.

Methods: We analyzed the Society for Vascular Surgery Vascular Quality Initiative Peripheral Vascular Intervention dataset from 2017 to 2021, which includes endovascular lower extremity interventions.

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Objective: Underinsured patients can experience worse preoperative medical optimization. We aimed to determine whether insurance status was associated with carotid endarterectomy (CEA) urgency and postoperative outcomes.

Methods: We analyzed the Society for Vascular Surgery Vascular Quality Initiative Carotid Endarterectomy dataset from January 2012 to January 2021.

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Kidney replacement therapy is required in up to one-third of patients after left ventricular assist device (LVAD) placement. A subset of these patients requires long-term maintenance hemodialysis and therefore needs durable vascular access but the ideal access in such patients has not been established. We present a series of 3 patients in whom arteriovenous grafts (AVGs) were successfully used for long-term kidney replacement therapy after LVAD placement.

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Objective: The contemporary medicolegal environment has been linked to procedure overuse, health care variation, and higher costs. For physicians accused of malpractice, there is also a personal toll. The objective of this study was to evaluate the prevalence of and risk factors for involvement in medical malpractice lawsuits among United States vascular surgeons, and to examine the association between these allegations with surgeon wellness.

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Objective: Patients without adequate outpatient follow-up often present requiring emergency hemodialysis and then undergo permanent dialysis access placement at a later time. We sought to examine the relationship between type of insurance and whether a patient was already on dialysis at time of surgery.

Methods: The Vascular Quality Initiative Hemodialysis Access registry was queried for all adult patients undergoing first time permanent hemodialysis access between January 2015 and September 2019.

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Objectives: To understand the impact that video telehealth has on outpatient visit volume and reimbursement as a method of maintaining care.

Background: As the coronavirus disease 2019 (COVID-19) spread across the United States starting in 2020, it caused numerous areas of medicine and healthcare to reexamine how we provide care to patients across all disciplines. One method clinicians used to rapidly adapt to these transformed settings was video telehealth, which was previously rarely used.

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Objective: During the COVID-19 pandemic, central venous access line teams were implemented at many hospitals throughout the world to provide access for critically ill patients. The objective of this study was to describe the structure, practice patterns, and outcomes of these vascular access teams during the COVID-19 pandemic.

Methods: We conducted a cross-sectional, self-reported study of central venous access line teams in hospitals afflicted with the COVID-19 pandemic.

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Lower-extremity ischemia is a significant complication in children on femoral venoarterial extracorporeal membrane oxygenation (VA ECMO). Our institution currently routinely uses distal perfusion catheters (DPCs) in all femoral arterial cannulations in attempts to reduce ischemia. We performed a single-center, retrospective review of pediatric patients supported with femoral VA ECMO from January 2005 to November 2015.

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Orthopedic surgeons commonly encounter patients with lumbar radiculopathy. These patients typically seek treatment for lower back or buttock pain radiating down the leg. It can be challenging to differentiate between orthopedic, neurologic, and vascular causes of leg pain, such as peripheral artery disease (PAD), especially aortoiliac PAD, which can present with hip, buttock, and thigh pain.

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Objective: Despite improvements in endovascular therapy for lower extremity arterial disease, open surgical revascularization is still required when the disease is extensive. Although autogenous vein is the conduit of choice for open femoropopliteal bypass, prosthetic grafts can be an acceptable alternative when adequate vein is not available. The FUSION BIOLINE heparin-coated vascular graft (Maquet Endovascular, Wayne, NJ) was developed to improve the patency rate associated with standard prosthetic grafts.

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Background: The external carotid artery (ECA) can be an important collateral for cerebral perfusion in the presence of severe internal carotid artery (ICA) disease. ICA stenting that covers the ECA origin may put the ECA at increased risk of stenosis. Our objective was to determine the rate of ECA stenosis secondary to ICA stenting, determine predictive factors, and describe any subsequent associated symptoms.

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Object: Ventriculoatrial (VA) shunting is rarely used for patients with normal-pressure hydrocephalus (NPH), likely due to surgeon technical preference and case reports indicating cardiopulmonary complications. However, these complications have typically been limited to adults in whom VA shunts had been placed when they were children. Few studies have directly compared VA shunting to ventriculoperitoneal (VP) shunting in cases of NPH.

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Background: Race and insurance status are seen as potential barriers to health care access and maintenance. Our goal was to see how these, as well as other patient and procedural characteristics, affected our populations' upper extremity vascular access outcomes.

Methods: We retrospectively reviewed 601 vascular access patients from 2004 through 2012 in our urban university hospital.

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Background: Adrenal venous sampling (AVS) is used to distinguish between bilateral idiopathic hyperplasia and a functional adrenal tumor in patients with hyperaldosteronism. Successful sampling from both adrenal veins is necessary for lateralization and may require more than 1 procedure. AVS has traditionally been performed by interventional radiologists; however, our goal was to examine the outcomes when performed by a vascular surgeon.

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Background And Purpose: Statins are neuroprotective in a variety of experimental models of cerebral injury. We sought to determine whether patients taking statins before asymptomatic carotid endarterectomy exhibit a lower incidence of neurological injury (clinical stroke and cognitive dysfunction).

Methods: A total of 328 patients with asymptomatic carotid stenosis scheduled for elective carotid endarterectomy consented to participate in this observational study of perioperative neurological injury.

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Background: Digital subtraction angiography (DSA) is the gold standard for diagnosing lower extremity (LE) arterial lesions. However, duplex ultrasound (DUS) is a widely used, safe, and noninvasive method of detecting LE lesions. The purpose of this study was to establish DUS criteria for detecting and grading de novo stenotic lesions in the femoropopliteal arterial segment.

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Innominate and subclavian artery lesions run a wide spectrum of disease manifestation and treatment options. Since the first surgical treatment, multiple variances have been attempted with the desire to maintain high long-term patency rates while reducing perioperative morbidity and mortality. The advent of endovascular procedures in the 1970s provided the opportunity to seek alternative treatment options, but the fear of serious neurologic sequela stalled the adoption of these new techniques.

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A 41-year-old woman, status postmastectomy for breast cancer had an attempted 8-F left subclavian vein chemotherapy port placed in her. She developed severe upper back pain radiating to the left shoulder. A computed tomographic scan and angiography revealed catheter placement in the left subclavian artery and a type B aortic dissection.

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Background: Studies examining duplex surveillance of lower extremity bypass grafts have defined a role for guiding graft re-intervention. The goal of this study is to determine the utility of duplex scanning to detect angiographic restenosis after endovascular therapy in patients with infrainguinal arterial disease.

Methods: A prospective registry including all patients treated for lower extremity atherosclerotic disease between February 2004 and September 2008 was established.

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A 31-year-old man underwent a Whipple procedure for a pancreatic neuroendocrine tumor, which consists of a pancreaticoduodenectomy and reconstruction to restore intestinal continuity. Six weeks after the operation, he presented with severe mid-epigastric pain radiating to his back. Imaging studies revealed a large pseudoaneurysm arising from the superior mesenteric artery.

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