Prenatal multicystic encephalomalacia due to anomaly of the aortic arch.

Multicystic encephalomalacia (ME) usually results from severe hypoxic-ischemic brain damage occurring during the late third trimester of gestation and birth. We report on a case of congenital ME due to a congenital anomaly of the aortic origin of brachiocephalic vessels resulting in subclavian steal syndrome. A 5-day-old term neonate presented with microcephaly and overlapping cranial sutures. Both arms were developed normally. Magnetic resonance imaging of the brain showed extensive bilateral supratentorial ME. Color duplex sonography of the aortic arch and the intracranial and extracranial vessels revealed a stenosis at the origin of the left common carotid artery and atresia of the origin of the left subclavian artery resulting in left-sided subclavian steal syndrome and retrograde perfusion of the basilar artery. Total cerebral blood flow volume was reduced to 22 mL/min. Severely reduced cerebral blood flow volume resulted from left carotid artery stenosis and atresia of the origin of the left subclavian artery with consecutive subclavian steal. Infratentorial brain structures and the left arm remained intact, but supratentorial brain structures were severely affected with ME

Supplementary Material for: Realistic 3D-Printed Tracheobronchial Tree Model from a 1-Year-Old Girl for Pediatric Bronchoscopy Training

<p>No Abstract</p><p><br></p

Untersuchungen zur Funktionssicherheit der Druckhalter-Sicherheitsventile beim Abblasen von heissem Druckwasser und vollem Massendurchsatz in Originalgeometrie Abschlussbericht. Abschlussdatum: April 1986

TIB: RO 2584 (1986,5) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Self-sustained current oscillation above 100 GHz in a GaAs/AlAs superlattice

A GaAs/AlAs superlattice with a large miniband (120 meV) showed self-sustained current oscillation at a frequency of 103 GHz giving rise to microwave emission (power 0.5 mW). The emission line had a linewidth of about 1 MHz and was tuneable by about 800 MHz. An analysis suggests that the transport in the superlattice was mainly due to electrons in the lowest miniband and that the oscillation was caused by traveling dipole domains. We also observed frequency locking of the current oscillation attributed to a synchronization of domain propagation by the external high-frequency field

Follow-Up Results of Device Occlusion of Patent Ductus Arteriosus

Background Transcatheter patent ductus arteriosus (PDA) closure is an established procedure. Objectives The aim of the study was to assess midterm follow up of the Nit-Occlud coil and the amplatzer ductal occluder (ADO) closure of PDA. Patients and Methods In this cohort study, we collected the longitudinal data of patients who underwent percutaneous closure using coil or ADO from November 2005 to November 2013. A total of 404 patients with PDA closure by devices were included during the study period. Coil occlusion was performed in 220 patients and 184 patients underwent catheterization using ADO. Follow-up evaluations were performed with echocardiography at two weeks, two months, six months, and during the study period (in average 4.8 ± 3.8 years). Results The patients’ mean age was 24 months (range: 1 - 312). The catheterization was successful in 393 (97.2%) patients and unsuccessful in 11 (2.7%). Immediate complete occlusion was seen in 290 (73.7 %) patients. The occlusion rates at two weeks, two months, six months, and during the study period were 73.7%, 84%, 93.6%, 98.7%, and 99.5%, respectively. Complications occurred in 23 (5.8%) patients during or immediately after the catheterization, and device embolization with 2.7% was the most common complication. Most complications occurred in a patient with pulmonary hypertension who was less than one year old and was undergoing the first year of experience with devices. Conclusions Our findings showed that transcatheter occlusion of the PDA is an effective and safe intervention by coil or Amplatzer with excellent early and one-year outcomes. Pulmonary hypertension, age of less than 12 months and experience of less than one year may increase the complications of device closure