OBJECTIVE The insertion of intracoronary shunts during off-pump coronary artery bypass surgery may induce severe endothelial dysfunction in the target arteries. The purpose of this study was to determine the role of the ratio of the shunt diameter to the target artery diameter in the development of endothelial dysfunction and to develop guidelines for selecting the most appropriate shunt size. ...

This paper describes efforts undertaken to upgrade ac-dc current transfer standards and calibrations at the National Research Council of Canada. The ac-dc current transfer comparator has been redesigned, using guarding techniques most advantageous for the current shunt comparisons. A set of coaxial shunts for currents between 10 mA and 10 A has been built, and characterized up to 100 kHz by a s...

This paper combines negative capacitance (NC) with inductance (L) to enlarge low-frequency bandgap width in locally resonant piezoelectric metamaterials. The studied metamaterials are obtained by directly bonding patches on the surfaces of host structures, then connecting shunts. Shunts NC and L series parallel both studied. Analytical expressions ranges derived, which reveal that size is incre...

A survey of antibiotic prophylaxis recommendations for patients with hydrocephalus shunts was sent to directors of advanced programs in pediatric dentistry and neurosurgery. Recommendations were sought for patients with ventriculoperitoneal (VP) or ventriculoatrial (VA) shunts who were to receive dental care. Most respondents believed that shunt infection (SI) was related infrequently to dental...

ANUMBER of methods have been developed for detecting left-to-right shunts during cardiac catheterization of which the most frequently employed is determining the difference in oxygen saturations. This method has limited application in the presence of small shunts, however, since the minimal changes are often within the error of this method.' Therefore, other more sensitive technics have been em...

Background: Lumboperitoneal (LP) shunts were the mainstay of cerebrospinal fluid diversion therapy for idiopathic intracranial hypertension (IIH). The traditionally cited advantage of LP shunts over ventriculoperitoneal (VP) shunts is the ease of insertion in IIH. This needs to be placed at the level of L3/4 to be below the level of the spinal cord. The objective of this study was to analyse th...

BACKGROUND Although significant advances are expected to be made in the assessment of the portal hypertension-related complications, the prognostic role of spleno-renal shunts has not been fully explored so far. Clarifying this aspect could help tackle the life-treating events occurring in patients suffering from liver cirrhosis. The aim of the study was to analyze the relationships between the...

Laparoscopic repair of pelvic organ prolapse in patients with ventriculoperitoneal shunts has not been previously described. The optimum management of patients with ventriculoperitoneal shunts undergoing laparoscopy is uncertain. We describe the case of a 21-year-old female patient with spina bifida and ventriculoperitoneal shunt who underwent laparoscopic hysteropexy for severe pelvic organ pr...

Eleven patients with a total of 17 palliative systemic-pulmonary artery shunts underwent evaluation by electrocardiogram-gated magnetic resonance imaging (GMRI). GMRI successfully imaged 1 1 of 17 shunts (65%), including five of nine Blalock-Taussig shunts, four of six Glenn shunts, and both aortopulmonary shunts. All shunts except for the Waterston were imaged on coronal sections during end-sy...

STUDY OBJECTIVE We compare the prevalence of clinically important traumatic brain injuries and the use of cranial computed tomography (CT) in children with minor blunt head trauma with and without ventricular shunts. METHODS We performed a secondary analysis of a prospective observational cohort study of children with blunt head trauma presenting to a participating Pediatric Emergency Care Ap...