Search results for "External carotid artery"

Blutungen nach CO2-laserchirurgischer Tumorentfernung im HNO-Bereich

2004

Background: There are different reports in the literature how often postoperative hemorrhage occurs after laser resection of head-and-neck tumours. This retrospective study investigates the frequency of postoperative hemorrhage after laser surgery of head and neck tumours. Time and extent of bleeding have been considered as well as the localization of the primary tumour and possible general risk factors. Methods and Patients: Between 1998 and 2001, microscopic laser surgery was performed in 223 patients with previously untreated squamous cell carcinomas of the oral cavity, oropharynx, supraglottic and glottic region and the hypopharynx. In case of ultrasonographic or palpable evidence of ce…

Intra- and extracerebral blood flow changes and flushing after intravenous injection of human corticotropin-releasing hormone

1994

To study facial flush after systemic administration of human corticotropin-releasing hormone (hCRH) we injected 100 micrograms hCRH intravenously to ten healthy young men. The increase in facial temperature was measured by infrared camera. A significant increase in facial temperature of 1.39 degrees C +/- 0.3 was found within 7 min in all patients, which lasted up to 60 min, although facial flushing was visible in only 50% (5/10) of the probands. In a second experiment 100 micrograms hCRH was then administered to seven other healthy young men. Intra- and extracerebral blood flow velocity changes in the medial cerebral artery (MCA) and external carotid artery (ECA) were measured after hCRH a…

Characterization of the cortical laser-doppler flow and hippocampal degenerative patterns after global cerebral ischaemia in the goat.

1998

Large-animal models offer several advantages in the study of cerebral ischaemia: easier control of physiological variables, easier neuropathological evaluation, etc. In the present study we have taken advantage of the unique cerebrovascular anatomy of the goat to reproduce a model of reversible, incomplete, global cerebral ischaemia in a large-sized animal species, in which the effects of successive manoeuvres to stop and re-start cerebral blood flow can be recorded continuously. Early cortical laser-Doppler flow response (up to 2 h) and delayed neuronal degeneration (7 days) in the hippocampal CA1 subfield have been analysed in goats undergoing 5, 10 or 20 min of transient, global cerebral…

Association between multiple biomarkers and classical risk factors with early carotid atherosclerosis

2013

Die Rolle der Farbduplexsonographie bei Diagnose und Differentialdiagnose von Glomus-caroticum-Tumoren*

1996

BACKGROUND Currently the diagnosis of tumorous lesions of the carotid bifurcation is the domain of magnetic resonance imaging (MRI) and digital subtraction angiography (DSA). So far, colour Doppler imaging (CDI) has not been playing an important part in this field. The aim of this study was to define the diagnostic value of CDI in the evaluation of these tumours related to the big arteries and to compare the different imaging techniques. PATIENTS AND METHODS 6 female patients with suspected tumours of the carotid bifurcation were examined with CDI. Additionally 5 MRI examinations and 3 preoperative diagnostic DSA examinations were performed in the same patients. Pathologically, there were 4…

“The importance of being external”: review of the literature of the rare phenomenon of common carotid occlusion with bulb reverse-crossed stenosis an…

2022

Common carotid artery occlusion (CCAO) is a rare phenomenon associated with the development of neurological symptoms. In CCAO, diversion of blood flow from the external carotid artery (ECA) to the internal carotid artery (ICA) via the carotid bulb (CB) may occur. This pathway activation has been called "carotid steal". Starting from a particular case we describe the ECD finding of a complete occlusion of CCA with patency of ICA and ECA. In case of occlusion of CCA, inversion of the ECA flow may occur, towards the ICA, and it can be damped by a significant stenosis crossed in retrograde direction that may concur to maintain the pressure balance between the two circulations. Usually, this par…