Parallel operating lists are a contentious subject. Many people feel that supervision, training and quality of patient care is negatively affected and consider this an outdated model in modern practice. Dual and parallel lists have been largely abandoned due to training committees' opinions that standards of orthopaedic training were being negatively affected.

A new model of dual lists was implemented in a district general hospital as part of an arthroplasty service. The training impact was evaluated. Adjacent theatres were utilised for a single session. Two joint replacement surgeries were undertaken in each theatre. The sequential timing of the lists allowed the consultant to perform or supervise all of the operations in a consecutive manor. Staggering the start times allowed the consultant to approach and implant the first joint replacement, leaving the junior doctor or nurse practitioner to close the first operation and get the patient off the table while the consultant transferred to the adjoining theatre where the registrar had positioned, painted and draped the second patient, allowing the consultant to perform or supervise the second surgery. The process was then repeated until all four cases were performed.

Evaluation of two registrar's elogbooks was undertaken and compared to the national average.

During a twelve month period the trainees was involved in a mean of 72 joint replacement surgeries compared to a national average of 49. The trainees were the primary surgeon in a significantly higher number of operations compared to the national average.

This model of sequential operating lists facilitated a service of high volume arthroplasty surgeries and significantly increased the exposure of the training registrar to joint replacements. Supervision of trainees was not significantly impacted. The model requires effective support services and a dedicated team of theatre staff, but can be very rewarding for consultant surgeon and trainee alike.