No absolute concensus exists as to how long to an abdominoplasty site should be drained. Nevertheless, your situation of 5 weeks of hemovac drainage is a lengthly outlier. Most surgeons make their decision on when to remove drains based on a diminishing qauntity of fluid drained and fluid quality that becomes progressively clearer over time. In the vast majority of cases, drains are removed less than 7days after an uncomplicated abdominoplasty. Leaving a drain in place for an extended duration runs the risk of infection from bacteria entering the wound by way of the drainage portal. Furthermore, tissue ingrowth into the holes of the drain may make for difficult and bloody during drain extraction. Your description suggests that you and your treating surgeon have elected to remove the drain. Using an abdominal binder after drain removal may assist in collapse of the internal cavity as well as to control swelling. Best of luck.