Effects of long-term heat disinfection on Soflens (polymacon) contact lenses

Soflens (polymacon) contact lenses were subjected to long-term heat disinfection in a carefully controlled laboratory study and in a patient clinical study. No adverse effects were observed on the physical or chemical properties of the lenses other than the deposition of some tear components in a portion of the patient-worn lenses. This was not unexpected since no enzyme or surfactant cleaners were used.

Morphologic and biochemical studies on the experimental chronic ischemic myocardium with the Ameroid constrictor

1. Morphologic as well as biochemical alterations in chronic ischemic myocardial tissue without infarction were studied in dogs utilizing the Ameroid constrictor. 2. Serum creatine kinase activity elevated at around three weeks after placing the Ameroid constrictor around the circumflex branch of the left coronary artery suggestive of myocardial tissue injury followed by the initial activation caused by surgery. 3. Subendocardial proliferation of connective tissue was observed in about 60% of the experiments, but the middle and the subepicardial muscles were morphologically intact. 4. The marked increase in glycogen particles was observed in the subendocardial muscle cells in most of the experiments, and mild features of myocardial cellular necrosis were found in approximately 60% of the experiments. 5. ATPase activities of the structural proteins as well as sarcoplasmic reticulum in the ischemic myocardium shoed relatively higher values than those in the non-ischemic myocardium. However, no substructural changes were observed in SDS gel electrophoresis in both the fractions. 6. The alterations in the chronic myocardial ischemia are supposed to be essentially the same as those in myocardial necrosis followed by acute coronary occlusion.