Retrospective evaluation of a right heart parameter score in the assessment of precapillary pulmonary hypertension in dogs (2017-2021): 135 cases.

Objective: To determine if emergency and critical care residents can identify moderate to severe precapillary pulmonary hypertension on cardiologist-obtained cineloops using a pulmonary hypertension score (PHS) and report the interobserver variability of the PHS.

Design: Multicenter, retrospective, case-control study from 2017 to 2021.

Setting: Private referral center and veterinary teaching hospital.

Catheter Directed Thrombectomy and Other Deep Venous Interventions in Cancer Patients.

Treating cancer patients with deep venous thrombosis/venous thromboembolism (DVT/VTE) can be challenging as patients are frequently unable to receive the standard therapy of anticoagulation due to the increased risk of bleeding complications seen in this population. Similarly, the hesitation of interventionalists to use thrombolytic agents due to bleeding risks limits percutaneous intervention options as well. Further, outcome data and guidelines do not exist for oncologic patients and often treatment is tailored to patient-specific factors after multidisciplinary discussion.

Combined Polarization/Magnetic Modulation of a Transverse NMR Gyroscope.

In this paper, we describe a new approach to the continuous operation of a transverse spin-exchange optically pumped NMR gyroscope that utilizes modulation of both the applied bias field and the optical pumping. We demonstrate the simultaneous, continuous excitation of 131Xe and 129Xe using this hybrid modulation approach and the real-time demodulation of the Xe precession using a custom least-squares fitting algorithm. We present rotation rate measurements with this device, with a common field suppression factor of ∼1400, an angle random walk of 21 μHz/Hz, and a bias instability of ∼480 nHz after ∼1000 s.

Feedback Methods for Vector Measurements Using an All-Optical Atomic Magnetometer.

In this work, we look to compare three methods of feedback for the ultimate purpose of measuring the transverse vector components of a magnetic field using a synchronous light-pulse atomic scalar magnetometer with a few tens of fT/Hz sensitivity in Earth-field-scale magnetic environments. By applying modulation in the magnetic field to orthogonal axes, the respective vector components may, in principle, be separated from the scalar measurement. Success of this technique depends in significant part on the ability to measure and respond to these perturbations with low measurement uncertainty.

Predictors for Nonhome Patient Discharge following Lower Extremity Arterial Interventions.

Purpose: To identify the variables associated with patient discharge disposition to optimize postprocedural care and discharge planning following lower extremity arterial interventions for peripheral artery disease (PAD).

Materials And Methods: The 2014-2017 American College of Surgeons National Surgical Quality Improvement Program database was queried using current procedural terminology codes for endovascular infrainguinal interventions for PAD. The main outcome variable of interest was nonhome discharge.

Insulin-Dependent Status Influences Post-Procedural Outcomes in Diabetic Patients Following Lower Extremity Endovascular Intervention for Peripheral Arterial Disease.

Purpose: Diabetic patients are at increased risk of developing lower extremity peripheral arterial disease (PAD) requiring revascularization. This study assessed the effect of insulin dependence in diabetics on post-procedural outcomes following infra-inguinal endovascular intervention.

Materials And Methods: The American College of Surgeon's National Surgical Quality Improvement Program database was used to identify 8022 patients undergoing infra-inguinal endovascular interventions between 2014 and 2017.

All-optical intrinsic atomic gradiometer with sub-20 fT/cm/√Hz sensitivity in a 22 µT earth-scale magnetic field.

In this work we demonstrate a high sensitivity atomic gradiometer capable of operation in earth-field level environments. We apply a light-pulse sequence at four times the Larmor frequency to achieve gradiometer sensitivity <20 fT/cm/H at the finite field strength of 22 µT. The experimental timing sequence can be tuned to the field magnitude of interest.

Characterizing atomic magnetic gradiometers for fetal magnetocardiography.

Atomic magnetometers (AMs) offer many advantages over superconducting quantum interference devices due to, among other things, having comparable sensitivity while not requiring cryogenics. One of the major limitations of AMs is the challenge of configuring them as gradiometers. We report the development of a spin-exchange relaxation free vector atomic magnetic gradiometer with a sensitivity of 3 fT cm Hz and common mode rejection ratio >150 in the band from DC to 100 Hz.

Endobronchial forceps-assisted complex retrieval of inferior vena cava filters.

Objective: The objective of this study was to assess the safety, feasibility, and effectiveness of endobronchial forceps-assisted retrieval of inferior vena cava (IVC) filters when standard retrieval techniques fail.

Methods: An Institutional Review Board-approved single-center retrospective review during a 6-year period identified 60 consecutive patients (23 men and 37 women; mean age, 49.3 years; range, 19-77 years) in whom rigid endobronchial forceps were required for IVC filter retrieval after standard techniques failed.

Complications of endovascular aneurysm repair of the thoracic and abdominal aorta: evaluation and management.

In recent decades, endovascular aneurysm repair or endovascular aortic repair (EVAR) has become an acceptable alternative to open surgery for the treatment of thoracic and abdominal aortic aneurysms and other aortic pathologies such as the acute aortic syndromes (e.g., penetrating aortic ulcer, intramural hematoma, dissection).

Optically polarized He.

This article reviews the physics and technology of producing large quantities of highly spin-polarized He nuclei using spin-exchange (SEOP) and metastability-exchange (MEOP) optical pumping. Both technical developments and deeper understanding of the physical processes involved have led to substantial improvements in the capabilities of both methods. For SEOP, the use of spectrally narrowed lasers and K-Rb mixtures has substantially increased the achievable polarization and polarizing rate.

Parallel Low-Loss Measurement of Multiple Atomic Qubits.

We demonstrate low-loss measurement of the hyperfine ground state of rubidium atoms by state dependent fluorescence detection in a dipole trap array of five sites. The presence of atoms and their internal states are minimally altered by utilizing circularly polarized probe light and a strictly controlled quantization axis. We achieve mean state detection fidelity of 97% without correcting for imperfect state preparation or background losses, and 98.

Safety and Efficacy of Catheter-Directed Therapies as a Supplement to Surgical Decompression in Venous Thoracic Outlet Syndrome.

Objective: The purpose of this study is to evaluate the role of endovascular therapy in the management of venous thoracic outlet syndrome (TOS), with an emphasis on its role after surgical decompression.

Materials And Methods: This single-center retrospective review identified all patients who underwent conventional contrast-enhanced venography as a component of the imaging evaluation of clinically suspected venous TOS from January 2004 through September 2015. Eighty-one patients were identified, with a mean (± SD) age of 33 ± 12 years, of whom 59% (48/81) were women.

Proposal of a New Adverse Event Classification by the Society of Interventional Radiology Standards of Practice Committee.

Purpose: To develop a new adverse event (AE) classification for the interventional radiology (IR) procedures and evaluate its clinical, research, and educational value compared with the existing Society of Interventional Radiology (SIR) classification via an SIR member survey.

Materials And Methods: A new AE classification was developed by members of the Standards of Practice Committee of the SIR. Subsequently, a survey was created by a group of 18 members from the SIR Standards of Practice Committee and Service Lines.

Novel and Advanced Techniques for Complex IVC Filter Retrieval.

Inferior vena cava (IVC) filter placement is indicated for the treatment of venous thromboembolism (VTE) in patients with a contraindication to or a failure of anticoagulation. With the advent of retrievable IVC filters and their ease of placement, an increasing number of such filters are being inserted for prophylaxis in patients at high risk for VTE. Available data show that only a small number of these filters are retrieved within the recommended period, if at all, prompting the FDA to issue a statement on the need for their timely removal.