Selective enhancement of H signal from water and oil in porous media at low field with Overhauser DNP.

In porous media MR studies, discriminating between oil and water presents a challenge because MR lifetimes are often similar and spectra overlap. Low saturations might suggest an experimental strategy of increasing the static field for increased sensitivity, but susceptibility effects are exacerbated at higher field. Overhauser dynamic nuclear polarization, effective at low static field, was employed with water and oil-soluble nitroxide to selectively enhance water and oil signals.

Smaller Hospital Size is Associated With Higher Mortality in Stanford Type A Aortic Dissection.

Background: Stanford Type A Aortic Dissection (TAAD) is associated with high in-hospital mortality and the need for immediate surgical intervention. Larger hospital size may be associated with better patient care and surgical outcomes. This study aimed to examine the effect of hospital size on TAAD outcomes.

Weekend Admission is Associated with Higher Kidney Failures after Thoracic Endovascular Aneurysm Repair for Stanford Type B Aortic Dissection.

Background: Weekend effect characterized by worse perioperative outcomes has been demonstrated in some surgery patients admitted on weekends, as opposed to weekdays. This study aimed to examine weekend effect on open surgical repair or thoracic endovascular aneurysm repair (TEVAR) for Stanford Type B Aortic Dissection (TBAD).

Methods: Patients who underwent TBAD repair were identified in National/Nationwisde Inpatient Sample from Q4 2015-2020.

Televascular consultation is one answer to rural vascular surgery shortage.

Telemedicine provides an opportunity for virtual consultation between physicians and patients in remote locations. We sought to evaluate whether telemedicine consultation for vascular surgery can replace direct visits for patients in remote areas. Patients undergoing telemedicine consultation from 2014-2019 at the Veterans Affairs Medical Center (VAMC) with a large rural catchment area, were reviewed.

NT-Pro BNP Predicts Myocardial Injury Post-vascular Surgery and is Reduced with CoQ: A Randomized Double-Blind Trial.

Background: NT-Pro BNP levels provide incremental value in perioperative risk assessment prior to major noncardiac surgery. Whether they can be pharmacologically modified in patients prior to an elective vascular operation is uncertain.

Methods: A double-blind, randomized controlled trial was implemented at a single institution.

Supplemental oxygen reverses hypoxia-induced smooth muscle cell proliferation by modulating HIF-alpha and VEGF levels in a rabbit arteriovenous fistula model.

Background: Numerous mechanisms for the formation of intimal hyperplasia have been proposed but none have been proven or accepted. Our research focuses on the potential role of hypoxia-inducible factors (HIFs), vascular endothelial growth factor (VEGF), and platelet-derived growth factors as well as the extracellular signal-regulated kinase (ERK), phosphatidylinositide 3-kinase /protein Kinase B (PI3-K/AKT) pathway in hypoxia-mediated intimal hyperplasia processes. We hypothesize that HIF and VEGF will be downregulated with supplemental oxygen in our arteriovenous fistula rabbit model.

The role of short-term oxygen administration in the prevention of intimal hyperplasia.

Objective: Intimal hyperplasia (IH) is the cause of most failed arteriovenous fistulas (AVFs), resulting in repeat procedures and leading to increased utilization of scarce health care resources. Our laboratory has previously demonstrated the role of supplemental oxygen in preventing IH and smooth muscle cell proliferation (SMCp) at an artery-to-graft anastomosis and at the deployment site of an intra-arterial stent. This study examines the effect of supplemental oxygen in preventing IH and SMCp in an AVF in a rabbit model.

High pressure magnetic resonance imaging with metallic vessels.

High pressure measurements in most scientific fields rely on metal vessels given the superior tensile strength of metals. We introduce high pressure magnetic resonance imaging (MRI) measurements with metallic vessels. The developed MRI compatible metallic pressure vessel concept is very general in application.

Non-Cartesian sampled centric scan SPRITE imaging with magnetic field gradient and B0(t) field measurements for MRI in the vicinity of metal structures.

This paper proposes the possibility of spatially resolved MRI measurements undertaken inside metallic cells. MRI has been rarely usable inside conducting vessels due to the eddy currents in the walls caused by switching magnetic field gradients, which render most advanced MRI pulse sequences impossible. We propose magnetic field gradient waveform monitoring (MFGM) for MRI of samples inside metallic cells.