A perspective on errors, bias, and interpretation in the forensic sciences and direction for continuing advancement.

The forensic sciences are under review more so than ever before. Such review is necessary and healthy and should be a continuous process. It identifies areas for improvement in quality practices and services.

A simple system to deliver blood cardioplegia.

We describe a simple and inexpensive system designed to deliver blood cardioplegia either diluted or at the patient's hematocrit, with controlled temperature and additive concentration. This system can be applied to any pump set, and suits any strategy for clinical myocardial preservation.