Computerised vascular data management: a flexible modular registry suitable for the evaluation of long-term results...

We have designed a computerised vascular registry (CVR) combining storage of complete patient histories in minute detail, including reoperations and long-term follow-up, with clinical applicability. The basic concept of this registry is the storage of data in a structure of cycles (one cycle per treatment episode), modules (clusters of logistically correlated data) and data-chapters (clusters of clinically correlated data). The registry was designed to minimally interfere with routine clinical practice, for instance by collecting the data step-by-step at the wards and out-patient clinics, quite similar to traditional record keeping. The CVR enables production of inventories of all stored data. More importantly, and in addition to other registries, the structure of our registry adequately enables analyses of data of patients with multiple interventions and patients with long-term follow-up. A microcomputer was used for the input of data, which were stored in a structure enabling effortless transportation of the data to a mainframe computer. Standard software programs were used. Simple inventories and analyses were performed on a microcomputer, and a mainframe computer was used for more complex analyses. The performance and applicability of the newly designed CVR was thoroughly tested in comprehensive retrospective studies. On the basis of these experiences several adjustments were carried out after which the CVR was introduced into clinical practice.