Cytotoxins released from plastic perfusion apparatus

Toxicity of intravenous catheters tested in a human bone marrow culture system

Nine brands of i.v. catheter were tested for toxicity in a human bone marrow culture system, and content and leaching of plasticizers determined. Three catheters showed toxicity to the culture system and three others leached di-2-ethylhexyl-phthalate in appreciable amounts.

The isolated perfused lung

The unique nonrespiratory functions of the lungs have become more apparent in recent years. The isolated perfused lung model offers many advantages over other methods for the study of pulmonary metabolism, xenobiotic disposition and the influence of interactions among agents of different physical forms. Detailed descriptions of the experimental preparation are elements in evaluating and comparing data from various sources but these are frequently neglected. A discussion and critique of the following elements are provided in this review in order to elucidate the typical problems one might encounter in evaluating data: perfusate type, perfusion method, construction materials, ventilation method, temperature control, surgical procedure, microbiological contamination and evaluation criteria of the preparation. Examples are given where the IPL method has been applied and suggestions are made for future research efforts.

The enhancing effect of bone marrow cells on the primary immune response of the isolated perfused spleen

The addition of bone marrow cells or peripheral lymphocytes to the isolated pig spleen markedly enhanced the primary antibody response after 3-day perfusion and antigenic challenge in vitro. The splenic preparation without added cells or with the addition of marrow cells to an irradiated spleen gave a limited response. Contributory evidence is provided that at least two distinct cell types are needed for antibody production. For optimal antibody response by an isolated perfused spleen, marrow cells or peripheral lymphocytes should be added to the system.