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Cyanoacrylates, a group of rapidly polymerizing adhesives, have found widespread uses in oral and general surgery as well as surgical subspecialties, for example as hemostatic and anastomotic agents. They have been utilized most recently as materials for embolotherapy of complex cerebral and extra-cerebral vascular anomalies. The histopathology that results from their deposition in human tissues is thus an important consideration, and the subject of this review. Particular attention is given to the fate of cyanoacrylates in cerebral lesions after iatrogenic embolization procedures. The apparent toxicity of these plastics on blood vessel walls is discussed in relation to experimental observations. It is imperative that clinicians who use this group of substances evaluate their potential functions in the light of the pathologic findings.

The device is constructed for intra-operative angiographic studies. The main features of the unit are: semi-automatic positioning of the tube into preset coordinates, TV camera serving as receptor, reproduction of the videosignal with twice the number of lines compared with that used normally, retrieval technique permitting one to study the flow of the contrast medium in slow motion at the required speed. Further advantages: Intra-operative control of the correct operative technique. No need for postoperative anaesthesia and cerebral angiography.

A combination of computed tomography and angiography permits accurate detailed evaluation of common lesions of the ambient cistern.

Twenty-one intracranial arteriovenous malformations (17 pial, 3 dural, 1 mixed) have been studied by digital intravenous subtraction angiography (DIVA). A comparison with conventional arteriography has been performed. In this series DIVA was 100% diagnostic for AVM. However DIVA missed some small arterial pedicles (1 lenticulostriate, 1 thalamoperforating, 1 anterior choroidal artery and 2 pharyngeal arteries). Sectorial analysis of AVM needs selective arteriography. DIVA is a good method for screening and follow-up of intracranial AVM, but selective arteriography is often still necessary to complete the pre-operative evaluation.

Magnification technique in cerebral arteriography is described. The advantage of this examination technique is discussed using examples of some angiograms.

Es wird uber drei Zwischenfalle bei der Carotisarteriographie und eine Komplikation bei der Vertebralisarteriographie berichtet. In allen Fallen fuhrte ein Gefaswandhamatom, dem eine Kontrastmittelinjektion in die Gefaswand vorausgegangen war, zu einem Verschlus der Arterie. Bei dem Zwischenfall nach Vertebralisarteriographie bestand auserdem eine intravasale Thrombose.

Radiation dosimetry measurements on angiographer, X-ray technician and patient were performed during 18 femerocerebral angiograms. Lithium fluoride (LiF) thermoluminescent dosimeters were placed on various body areas to measure X-ray exposure. The results of this study indicate that radiation exposure received by medical personnel are well within the maximum permissible dose range established by the National Council of Radiation Protection. However, radiation exposure levels to radiosensitive areas of the patient are significant. A method to reduce patient exposure during femerocerebral arteriograms is suggested.

L'angiographie digitalisee, meme chez les malades avec ischemie symptomatique, devrait toujours etre precedee par le meilleur test non invasif, a savoir l'echographie B a echo pulse

Une femme de 22 ans a consulte pour une surdite droite remontant a plusieurs annees, des acouphenes pulsatils unilateraux remontant a 6 mois et une autophonie droite remontant a deux mois. Au niveau de l'hypotympan droit on a note une grosse masse bleue deplacant lateralement le 1/3 inferieur du tympan. Une tomodensitometrie de haute resolution a revele un golfe de la jugulaire dehiscent. L'angiographie a montre un sinus occipital droit dominant avec un petit sinus transverse droit. Le sinus transverse gauche n'etait pas visualise