4 Dec, 10:19
Grand Slam winners Fiona Coghlan and Nora Stapelton have returned the Women's RBS 6 Nations trophy to Chief Executive John Feehan at the Six Nations offices in Dublin.
The 33-year-old, who has played 51 times for Ulster, has been experiencing episodes of knee joint pain during the province's pre-season training programme.
Friday's routine procedure in Belfast should determine the source of the problem.
Ulster physio Gareth Robinson is hopeful that Harrison, who stood in for Simon Best as captain when Ulster won the Celtic League title in 2006, will be back in training within four to six weeks.
Ulster kickstart their 2007/08 season with back-to-back friendlies against Leeds (August 31) and Gloucester (September 8) at Ravenhill.