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Biomedical subjects

A Berenstein

Publications and source records attributed to A Berenstein.

At least 91 records · Page 5Linked to original sources
PubMed1982

[The clinical application of intracranial artery canulation technique (author's transl)].

The introduction of the microscope into the neurosurgical operating theater brought the significant change on its operative results. However, even by means of the meticulous microsurgical techniques, certain intracranial lesion like deep-seated AVM cannot yet be successfully treated. Instead of the extravascular approach, intravascular treatment of these lesions has been evolved and become the great aid for the therapeutic purpose. In 1974 Serbinenko published his excellent work about his detachable balloon catheter technique. He succeeded in treating the intracranial lesions by the intravascular approach with the more exact manner than before. The balloon could make it possible to guide the small catheter into the distal branch of intracranial arteries. And also the balloon was detached and use as embolus. Until now, various balloon catheters become clinically available. Among them the catheter which Kerber devised is made of soft silicone and equipped with microballoon at the distal end. Although the balloon itself cannot be detached, it has a small hole at its top and can deliver the fluid through this opening (calibrated leak). The method for this catheter usage is as follows. Using Seldinger technique, the non-tapered thin wall catheter has to be placed on the proximal side of the attempted artery as the introducing catheter. Through it, balloon catheter is cannulated coaxically and navigated more distally with the inflation or deflation of the balloon. Clinical application of this catheter include the superselective angiography, drug infusion and selective embolization. For the embolization, fluid embolus must be chosen. At this time cyanoacrylate, a potent tissue adhesive, is used as the embolus and injected with the mixture of Pantopaque and tantalum powder. Two cases of deep seated cerebral AVM were treated by selective embolization. AVM was completely occluded in one case, in the other case the embolization was interrupted because of worsening of neurologic defecits. In conclusion, the calibrated leak balloon catheter (Kerber) has wide range of clinically applicable potential and will become the great aid for the intravascular treatment.

Adult↗
PubMed1981

Meningeal collateralization to normal cerebral vessels associated with intracerebral arteriovenous malformations: functional angiographic considerations.

External carotid arteries can provide collateral supply to anatomically normal brain tissue, made functionally ischemic by proximal vascular occlusion, or by fistulous shunting of blood through an arteriovenous malformation. The occlusion of such a meningeal collateral at angiography in a case of arteriovenous malformation demonstrated the delicate balances and rapid shifts in flow which may occur in such lesions. Selective injections of contrast materials into external carotid arteries are essential for the investigation of intracerebral arteriovenous malformations, particularly in patients undergoing evaluation for intravascular embolotherapy.

Adult↗
PubMed1981

Gelatin sponge in therapeutic neuroradiology: a subject review.

Gelatin sponge (Gelfoam) has been used extensively in transcatheter vascular occlusions. Its main disadvantage has been its biodegradable characteristics. In the present era of multiple and various embolic agents, the use of Gelfoam in therapeutic transvascular embolization is reevaluated. Its use as microparticles to obtain occlusion at the precapillary or capillary level in neoplastic conditions, or as a temporary block to protect normal territory, and its use in the control of hemorrhage are discussed.

Embolization, Therapeutic↗
PubMed1981

Visual disturbances in von Hippel-Lindau disease.

A 23-year-old woman with von Hippel-Lindau disease had headaches, visual disturbances, and an enlarged sella. Cerebral angiography demonstrated multiple posterior fossa hemangiomas and obstructive hydrocephalus. Massive dilation of the third ventricle compressed the chiasm, resulting in an unusual cause of visual disturbance.

Adult↗
PubMed1980

Posterior fossa vascular anomaly presenting as a vermis mass in a 4-year-old child: diagnostic and therapeutic considerations.

The computed tomographic (CT) scan has replaced angiography in the preoperative neurodiagnostic evaluation of the common pediatric posterior fossa tumors. This case report illustrates that rarely an atypical vascular anomaly may masquerade as a neoplasm and angiography must not be dismissed if the CT scan is any way atypical of the suspected neoplasm.

Cerebellar Neoplasms↗
PubMed1980

Flow-controlled silicone fluid embolization.

Flow-controlled silicone fluid embolization is a technique that can be useful in situations where selective injection cannot be achieved, but where the proximal part of the feeding vessel must be preserved. It consists of a modified double-lumen balloon catheter and silicone fluid made radiopaque with tantalum powder with a predetermined viscosity and vulcanization time. Flow control by manipulation of the balloon in the proximal artery permits the distribution of emboli to desired sites in distal arteries. A case is described and other details offered about this technique that may be valuable for special situations.

Adult↗
PubMed1979

Simplified solid-particle embolization with a new introducer.

A new and simple introducer for solid embolic particles consists of teflon tubing sized to prevent particle overriding, coupled with a backflow-limiting end adaptor, and has sterilization caps. The size-coded introducers can be of a preselected diameter and easily introduce from 1 to 30 emboli at a time.

Embolization, Therapeutic↗
PubMed1979

Catheter and material selection for transarterial embolization: technical considerations. I. Catheters.

In this first part of the report, the authors discuss the selection of catheterization techniques and delivery systems. These include various introducer sheaths, tapered and non-tapered conventional catheters, and double-lumen, single-lumen, flow-guided single-lumen, and detachable balloon catheters. The selection is discussed with regard to the specifics of the lesion, such as location of the lesion and number and size of feeding arteries. The authors' experience with experimental embolizations in dogs and the clinical material in 34 patients in whom 61 embolization procedures were performed are presented.

Adult↗