Objective\ To observe the long term results of expansive open door laminoplasty of cervical spine for cervical spinal stenotic myelopathy.Methods\ From April 1986 to March 1988, 98 cases were operated upon with expansive open door laminoplasty of cervical spine. Sixty one cases had been followed up for an average of 11 years and 8 months. The long term results were analyzed.Results\ The best results were obtained at the third year after operation among the OPLL (32 cases),DCS (20 cases) and CSM (8 cases),with an average JOA recovery rate for an average of 72.30%in OPLL, 67.74%in DCS and 67.80%in CSM. JOA recovery rate were 66.81%in OPLL, 66.57%in DCS and 66.1%in CSM at following up for an average of 11 years and 8 months. Instability of the cervical spine and reclosed open door were not found at the follow up for an average of 11 years and 8 months.Conclusion\ The long term results of expansive open door laminoplasty of cervical spine for cervical spinal myelopathy were good and stable. Expansive open door laminoplasty of cervical spine did not affect the stability of cervical spine.\;

Objective: To define the occurrence rate, time course, and potential mechanism of hyponatremia in patients after Frankel Class-A acute cervical spinal cord injury. Methods: Analysis of data obtained from a retrospective review of blood and urine records of 35 hospitalized cases from 1992 to 1998. Results: Patients were admitted after (2.8±1.8) days postinjury and had been hospitalized for (52±13) days. Hyponatremia, the occurrence rate of which was 100%, developed at a mean time of (4.5±1.2) days postinjury, reached its nadir at the end of (14±3) days and recovered to normal at (39±10) days. Fifteen (42.88%) cases did not recover from hyponatremia in the hospitalized period. Patients were suffering from hypercapnia, hypernitremia, polyuria, and hyper-natriuresis besides kalemia. Conclusion: Severe and obstinate hyponatremia is a very common complication of cervical spinal cord injury. The mechanism may be related to the Cerebral Salt Wasting Syndrome.

Objective To report the operative technique and clinical experiences of the modified reversed superficial peroneal neurocutaneous island flaps for reconstruction of the ankle and foot.Methods According to the previous anatomical studies and our clinical experiences,we devised the reversed superficial peroneal neuroeutaneous island flap based on the descending branch of the distal perforator of the peronealrtery and its venae comitantes,and covered the soft defect of the ankle and foot with it.Results Twenty-one of the 23 flaps survived completely without complications,while the other two occurred marginal necrosis.The maximum surface of the flap in our series was 12 cm×13 cm.and the minimum one was 5 cm×4 cm.The length of the pedicle ranged from 5 cm to 10 cm.The texture of the flaps was good,while the cosmetic and function of them were evaluated as acceptable in all cased after 6 to 21 months follow-up.Conclusion The reversod superficial peroneal neurocutaneous island flaps is a versatile,reliable procedure useful in reconstruction of the ankle and foot.