As part of the continuing evaluation programme of medical equipment sponsored by the UK Health Departments, the evaluation of patient monitors is being carried out within the Northern Regional Health Authority.'Health Equipment Information', Number 142 published in June 1985, contains evaluation reports on a further four monitors. These are the Cardiac Recorders Medifax, the Gould IM 1000, the Siemens Sirecust 404, and the Spacelabs Alpha 9. For fill details of the evaluation findings readers should consult‘HEI’142. The following is extracted from the report.Monitors reviewed in‘HEI’142 are designed to monitor blood pressure and body temperature, as well as ECG. For details of standards used, or guidance on selecting a monitor for a particular application, readers should consult either‘HEI’or earlier reports in this journal [l, 2 and 31.Purchasing information is on p. 35 in this issue.