The board had carried out 35 of about 220 extra procedures it needed to do, gastroenterology clinical leader Dr Jason Hill said.
The programme was launched last year, after a woman presented with bowel cancer, and the first procedures were carried out last month.
The woman would have received a surveillance colonoscopy had Dunedin not restricted them several years ago because of lack of resources. The hospital reviewed its records and recalled hundreds of patients.
''To date, 35 individuals have had the procedure. ''We are collating the results from these procedures and analysis of the outcomes will be available once the process is complete,'' Dr Hill said.
The programme would be completed by the end of the year.
''The decision to utilise the gastroenterology facility at the weekend avoids any impact on current wait lists, and is similar to programmes that have previously been undertaken both locally and nationally,'' Dr Hill said.
