[Portal vein embolization prior to major hepatectomy: A multidisciplinary approach for advanced liver tumors in Chile].

Background: One of the main limitations to achieving a complete tumor resection in patients with technically resectable liver tumors is the presence of a small future liver remnant (FLR). Portal vein embolization (PVE) allows hypertrophy of the non-embolized lobe, reducing the risk of postoperative liver failure.

Aim: To describe the experience of portal embolization prior to hepatectomy and its effectiveness in converting advanced unresectable liver tumors into resectable tumors.

The evolution of loan volume and non-performing loans under COVID-19 innovations: The Colombian case.

Financial institutions' scale of total and non-performing loans are important figures signaling economic activity and its risk level. COVID-19 created an external shock with overarching effects on the global economy, impacting the credit activity and debtors' ability to repay their obligations. We study how Colombia's loans and non-performing loans market ratios could react to an external shock (absent of any relief measures) by developing a vector autoregressive model with exogenous variables (VARX) with the Central Bank intervention rate as an exogenous variable.

Comparative complete scheme and booster effectiveness of COVID-19 vaccines in preventing SARS-CoV-2 infections with SARS-CoV-2 Omicron (BA.1) and Delta (B.1.617.2) variants: A case-case study based on electronic health records.

Background: Information on vaccine effectiveness in a context of novel variants of concern (VOC) emergence is of key importance to inform public health policies. This study aimed to estimate a measure of comparative vaccine effectiveness between Omicron (BA.1) and Delta (B.

[Embolization of spontaneous portosystemic shunts as treatment for refractory hepatic encephalopathy].

Background: Hepatic encephalopathy (HE) is a common complication of cirrhosis associated with a reduced survival. The presence of high-flux spontaneous porto-systemic shunts can induce HE even in patients with preserved liver function.

Aim: To evaluate the effect of spontaneous porto-systemic shunt embolization (SPSE) over HE and its long-term evolution.

Foraging Behaviour in Magellanic Woodpeckers Is Consistent with a Multi-Scale Assessment of Tree Quality.

Theoretical models predict that animals should make foraging decisions after assessing the quality of available habitat, but most models fail to consider the spatio-temporal scales at which animals perceive habitat availability. We tested three foraging strategies that explain how Magellanic woodpeckers (Campephilus magellanicus) assess the relative quality of trees: 1) Woodpeckers with local knowledge select trees based on the available trees in the immediate vicinity. 2) Woodpeckers lacking local knowledge select trees based on their availability at previously visited locations.

Hepatic encephalopathy in a liver transplant recipient with stable liver function.

Postshunt hepatic encephalopathy after liver transplantation (LT) is an infrequent condition and is commonly associated with portal occlusion or stenosis and the presence of a patent portosystemic shunt. Portal vein stenosis (PVS) or thrombosis (PVT) are uncommon complications after LT. The overall frequency of both complications is reported to be less than 3%.

Embolization of incompetent pelvic veins for the treatment of recurrent varicose veins in lower limbs and pelvic congestion syndrome.

Purpose: We present our experience with embolization of incompetent pelvic veins (IPV) in women with recurrence of varicose veins (VV) in lower limbs, as well as symptoms of pelvic congestion syndrome (PCS), after first surgery. In addition, we evaluated the effects of embolization in decreasing the symptoms of VV before surgery as well as its effects on PCS symptoms.

Materials And Methods: We included 10 women who had consulted a vascular surgeon because of recurrent VV in lower limbs after surgery.

[Diagnostic yield of CT pulmonary angiography and venography for thromboembolic disease].

Background: CT pulmonary angiography is the diagnostic procedure of choice for non-massive pulmonary embolism.

Aim: To assess the diagnostic yield for thromboembolic disease of CT pulmonary angiography and venography using a 64-slice multidetector tomography.

Material And Methods: Prospective study of patients with a clinical suspicion of thromboembolic disease, subjected to CT pulmonary angiography and venography.

[Myocardial lipids and creatine measured by magnetic resonance spectroscopy among patients with heart failure].

Background: Heart failure (HF) is characterized, among other features, by the development of alterations in myocardial energy metabolism, involving a decrease in glucose utilization and increased free fatty acid uptake by cardiomyocytes, associated with decreased deposits of high-energy phosphates (creatine phosphate/creatine transporter). Magnetic resonance (MR) imaging allows a direct and noninvasive assessment of myocardial metabolites.

Aim: To measure myocardial creatine and lipids by MR spectroscopy among patients with HF.

Natriuretic peptide type-B can be a marker of reperfusion in patients with pulmonary thromboembolism subjected to invasive treatment.

This study was intended to investigate changes in cardiac biomarkers and pulmonary hemodynamic effects of invasive treatment in patients with intermediate-risk (hemodynamic stability with evidence of right ventricle dysfunction and/or myocardial injury) pulmonary embolism. Also, to also evaluate if natriuretic peptide type-B (NT-proBNP) plasma levels are associated with right ventricle function and pulmonary arterial pressures. Interventional study: Fourteen normotensive adult patients with acute and radiologically massive pulmonary embolism plus positive biomarkers and evidences of right ventricle dysfunction underwent invasive pulmonary angiography for invasive treatment consisting on mechanical thrombus fragmentation and catheter-directed intrathrombus thrombolysis.

New frequency translation technique for FM-CW reflectometry.

In broadband microwave reflectometry, coherent detection is widely used to obtain the phase information and to improve the systems sensitivity, both in diagnostics measuring the electronic density profile and plasma fluctuations. Coherent detection uses a translated version of the probing signal to guarantee a stable intermediate frequency. Here, a novel technique to generate the frequency translation by double frequency conversion is presented and its advantages over the commonly used single frequency conversion techniques employing image rejection mixers are discussed.

Enhancement of visual perception with use of dynamic cues.

Unlabelled: Institutional review board approval and signed informed consent were not needed, as medical images included in public databases were used in this study. The purpose of this study was to improve the detection of microcalcifications on mammograms and lung nodules on chest radiographs by using the dynamic cues algorithm and the motion and flickering sensitivity of the human visual system (HVS). Different sets of mammograms from the Mammographic Image Analysis Society database and chest radiographs from the Japanese Society of Radiological Technology database were presented statically, as is standard, and in a video sequence generated with the dynamic cues algorithm.

Systematic and routine analysis of radial correlation reflectometry data in JET.

This paper discusses a tool specially developed for the analysis of radial correlation reflectometry data in JET. The tool, which calculates the correlation length and coherent reflection from the raw data, has been designed for offline analysis and to assist diagnostic operators. After being verified in controlled tests using theoretical signals, the tool is validated by means of a study of ITB plasmas in JET.

[Chemoembolization of hepatocarcinoma: report of two cases].

Chemoembolization is a therapeutic alternative for those patients with hepatocarcinoma that cannot be excised surgically or that are waiting a liver allograft. We report two patients with hepatocarcinoma who were subjected to chemoembolization. A 65 years old male with a chronic liver disease and right lobe hepatocarcinoma, waiting for a liver transplantation, was subjected to two sessions, of chemoembolization four weeks apart.

Carotid artery dissection: endovascular treatment. Report of 12 patients.

Objective: The purpose of this article is to report our experience with endovascular treatment of internal carotid artery (ICA) dissection with the use of stents.

Background: Carotid dissection is an important cause of ischemic stroke in young and middle-aged patients. There are some patients in whom invasive management is recommended.

TIPSS procedure in the treatment of a single patient after recent heart transplantation because of refractory ascites due to cardiac cirrhosis.

We present the case of a female patient with arrhythmogenic dysplasia of the right ventricle who evolved to refractory heart failure, ascites, and peripheral edema. As a result, heart transplantation was performed. Subsequently, refractory ascites impaired the patient's respiratory function, resulting in prolonged mechanical ventilation.

[Endoluminal stent-graft placement for acute dissection of the descending aorta complicated with rupture. Report of one case].

Acute dissection of the aorta, although not common, has early and highly lethal complications. The type A dissection is treated with surgery. Patients with type B dissections are treated with surgery if they have complications like rupture, growth or visceral ischemia.

[Pulmonary thromboembolism treated with pharmacological thrombolysis and mechanical fragmentation. Report of one case].

Pulmonary Embolism (PE) has a wide clinical spectrum. It is imperative to detect patients with a high risk to develop right ventricular failure, because this is the main cause of death in patients with massive PE. In this group of patients, invasive therapies to relieve pulmonary obstruction and right ventricle overload should be used as soon as possible.

[Double-balloon enteroscopy: experience in the Hospital de Especialidades del Centro Médico Nacional Siglo XXI IMSS, Mexico City].

Unlabelled: The methods used for the study of the small bowel are not ideal. Double-balloon enteroscopy is a new alternative with therapeutic potential.

Objective: Evaluate the utility, efficacy and safety of double-balloon enteroscopy in Mexico.

Gastric cancer after Roux-en-Y gastric bypass.

Roux-en-Y gastric bypass (RYGBP) is one of the most commonly performed surgical procedures for morbid obesity. Several complications that may develop in the short- and long-term have been reported. We present a patient who presented with cancer in the bypassed stomach 8 years after RYGBP.

[Newborn hydronephrosis: dynamic renal scintigraphy with Tc99m MAG3 in the first month of life].

Background: The early and accurate diagnosis of obstructive uropathy in the newborn, prevents secondary complications and kidney damage.

Aim: To study the usefulness of Tc99M MAG3 diuretic renogram in newborns with hydronephrosis.

Material And Methods: Forty newborns, aged 1 to 30 days, with hydronephrosis, were studied.

[Risk factors for permanent kidney damage in children with urinary tract infection].

Background: In children, urinary tract infection (UTI) is a very common disease, and can cause permanent kidney damage.

Aim: To determine risk factors for permanent kidney damage, in children with UTI.

Patients And Methods: In 337 children with UTI (237 female, mean age 4.