The sequelae of lumbar spondylolisthesis fusion surgery are mainly reflected in the following aspects: 1. The nerves may be damaged during the surgery, which may lead to numbness of the limbs in mild cases and complete impairment of motor function in severe cases. 2. If the patient suffers from nerve damage, numbness of the limbs will occur, and the patient will suffer from poor joint mobility and muscle atrophy. 4.