A multicenter evaluation of the Boehringer Mannheim/Hitachi 717 system.

Analytical performance of the Boehringer Mannheim/Hitachi 717 system was evaluated in a multicenter study involving seven different laboratories. Fifty-five methods including end point chemistries, enzymes, ISE, TDM, DAU, and specific protein assays were assessed over a 7 month period. Methods on the analyzer exhibited excellent precision with CVs less than 2% for within run precision, and CVs less than 3% for between day precision for most analytes; linearity, which met or exceeded manufacturer's claims; minimal sample and reagent carryover, and no significant interference from hemolysis; icterus; and lipemia.

An ameloblastoma with myofibroblasts and intracellular septate junctions.

This report represents a review of the ultrastructural features of the simple ameloblastoma. Our ultrastructural data indicate that the stromal component of ameloblastoma is composed of myofibroblasts with associated collagen and basal lamina material. A unique feature of these myofibroblasts is the formation of plaque-like structures on extended cell processes which were identified as intracellular septate junctions.

Early failure of expanded polytetrafluoroethylene in femoral vein replacement.

Grafts of expanded 30-mu fibril length polytetrafluoroethylene (PTFE) were inserted as segmental femoral vein replacements in nine dogs. The contralateral femoral vein served as a control, receiving a graft from each dog's right external jugular vein. Graft patency was monitored for 24 weeks postoperatively with serial venograms and venous pressures of the operated limbs.

Bilateral linear subconjunctival hemorrhage in a trauma patient.

A case of bilateral linear subconjunctival hemorrhage secondary to a gunshot wound to the chest has been presented. The linear character was explained by cardiac tamponade and nearly instantaneous cessation of cardiac output.