A 56-year-old man was admitted to our hospital for the purpose of rehabilitation. Because this patient developed apallic syndrome 21 days after he recovered from his first coma, he was diagnosed with the interval form of carbon monoxide (CO) poisoning. On admission, he showed paralysis of all limbs, motor dysfunction due to joint contractures, pain, and higher brain dysfunction. These symptoms were consistent with magnetic resonance imaging (MRI) findings that the frontal white matter was mainly affected while the involvement in the basal ganglion was mild. Rehabilitation was continued, and his motor dysfunction was improved in a few months, although the higher brain dysfunction needed a longer term to improve. An interruption of his rehabilitation resulted in the exacerbation of the motor dysfunction. Subsequent complications of CO poisoning have been reported to be linked to the areas of the involvement revealed by MRI. Since CO poisoning can show various symptoms, a diversity of rehabilitation is required, according to the patients' symptoms. We think that rehabilitation is the most effective therapy for the subsequent complications of CO poisoning. Since the symptoms require a long time to improve, it is difficult to deal with them within the application of the existing health insurance and nursing care support regulations. We consider that rehabilitation for motor dysfunction and higher brain dysfunction are important, in addition to hyperbaric oxygen therapy in the acute stage of CO poisoning.

Methods: We retrospectively examined patients with HSA who underwent dynamization–PLIF at our hospital between April 2010 and March 2018. The radiographic measurements included lumbar lordosis and local lordosis in the fused segment. The evaluation points were before surgery, immediately after surgery, 1 year after surgery, and 2 years after surgery. The preoperative and postoperative radiographic findings were compared using a paired t-test. A p-value of less than 0.05 was considered significant. Results: We included 50 patients (28 males, 22 females). Lumbar lordosis and local lordosis were significantly improved through dynamization– PLIF (lumbar lordosis, 28.4°–35.5°; local lordosis, 2.7°–12.8°; p<0.01). The mean local lordosis was maintained throughout the postoperative course at 1- and 2-year follow-up (12.9°–12.8°, p=0.89 and 12.9°–11.8°, p=0.07, respectively). Solid fusion was achieved in 59 (89%) of 66 fused segments. Solid fusion of all fixed segments was achieved in 42 cases (84%). Within 2 years postoperatively, only six cases (12%) were reoperated (two, surgical debridement for surgical site infection; two, reoperation for pedicle screw loosening; one, laminectomy for epidural hematoma; one, additional fusion for adjacent segment disease). Conclusions Dynamization–PLIF showed local lordosis improvement, a high solid fusion rate, and a low reoperation rate within 2 years of follow-up.