Frederick S. Keller

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Abbreviations: AGIB ϭ acute gastrointestinal bleeding, PTA ϭ percutaneous transluminal angioplasty, SFA ϭ superficial femoral artery, SIR ϭ Society of In-terventional Radiology, SK ϭ streptokinase, TIPS ϭ transjugular intrahepatic portosystemic shunt THE Society of Interventional Radiology (SIR) celebrates its 30th anniversary this year. During these 30(More)
Pore-forming protein from Entamoeba histolytica forms cation-selective channels in planar bilayers. With increasing potentials, the open-state probability of these channels decreases, and channel aggregates collapse (Young, J.D.-E. and Cohn, Z.A. (1985) J. Cell. Biochem. 29, 299-308). In this communication we report the following observations: (i)(More)
BACKGROUND Most of the presently used percutaneous arterial closure devices (PACD) for hemostasis after interventional vascular procedures are effective, but carry risk of complications by deposition of a foreign body. A new promising externally applied PACD - chitosan-based HemCon Bandage (HCB) was explored in sheep. The HCB hemostatic efficacy and(More)
BACKGROUND Barium sulfate powder used for radiopacity of experimental blood clots (EBCs) for testing mechanical thrombectomy devices (MTD) has negative effects on EBCs mechanical properties. In vitro and in vivo exploration was performed to determine if the iodine based contrast medium will have less negative effects on the EBCs than barium. MATERIALS AND(More)
BACKGROUND To evaluate the long-term effectiveness and safety of a new Double BioDisk (DBD) device for closure of atrial septal defect (ASD). MATERIALS AND METHODS.: ASD was created with transeptal needle (TS) followed by balloon dilatation in 12 sheep weighing 40.1 to 64 kg (mean 55.2 ± 7.1). The ASD diameters were measured after creation and two weeks(More)
Sequential 2D inflow NMR (SDI) venography was employed to define venous anatomy and pathology in five healthy subjects and five patients, mean age 48 +/- 7 years, with documented deep vein thrombosis. SDI images were graded independently by two observers on a scale of 1,2 nondiagnostic and 3,4 diagnostic categories. All iliac and femoropopliteal SDI(More)
In an elderly male patient with alcohol-related liver disease, who developed episodic confusion and tremor, we found a large extrahepatic portacaval shunt. He had no clinical or laboratory evidence of liver dysfunction except for an elevated serum ammonia level that increased further in response to an ammonium chloride challenge test. Extrahepatic(More)
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