ABSTRACT
Objective To analyse the retrobulbar haemodynamic changes after vitrectomy in patients with rhegmatogenous retinal detachment (RRD). Methods Color Doppler flow imaging (CDFI) was used for measurement of blood flow velocities including peak systolic velocity (PSV), end diastolic velocity (EVD) and resistive indexes (RI) of the ophthalmic artery (OA), posterior ciliary arteries (sPCA) and central retinal artery (CRA) in 50 eyes of 50 patients with RRD. In them 22 eyes were filled with silicone oil, 28 eyes were filled with 12%C3F8 and 22 eyes were operated to remove silicone oil after filled with silicone oil for 2-4 months, and then CDFI parameters were obtained. The contralateral eyes were used as control eyes before and after the operation. Results There were no significant differences in CRA and sPCA, and PSV, EDV and RI before treatment between RD and OA eyes and control eyes (P>0.05). PSV and EVD of CRA were significantly increased 3 months after surgery, RI were decreased significantly (P<0.05). There were no significant differences in blood flow parameters of OA and sPCA before and after surgeries (P>0.05). No changes were found in control eyes 3 months after surgery. Conclusion VRS might increase the velocity of CRA, decrease RI and improve ocular blood supply postoperatively.
ABSTRACT
Objective To analyse the retrobulbar haemodynamic changes after vitrectomy in patients with rhegmatogenous retinal detachment (RRD). Methods Color Doppler flow imaging (CDFI) was used for measurement of blood flow velocities including peak systolic velocity (PSV), end diastolic velocity (EVD) and resistive indexes (RI) of the ophthalmic artery (OA), posterior ciliary arteries (sPCA) and central retinal artery (CRA) in 50 eyes of 50 patients with RRD. In them 22 eyes were filled with silicone oil, 28 eyes were filled with 12%C3F8 and 22 eyes were operated to remove silicone oil after filled with silicone oil for 2-4 months, and then CDFI parameters were obtained. The contralateral eyes were used as control eyes before and after the operation. Results There were no significant differences in CRA and sPCA, and PSV, EDV and RI before treatment between RD and OA eyes and control eyes (P>0.05). PSV and EVD of CRA were significantly increased 3 months after surgery, RI were decreased significantly (P<0.05). There were no significant differences in blood flow parameters of OA and sPCA before and after surgeries (P>0.05). No changes were found in control eyes 3 months after surgery. Conclusion VRS might increase the velocity of CRA, decrease RI and improve ocular blood supply postoperatively.
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the prognostic factors for patients with thoracic ossification of the ligamentum flavum (OLF) and thoracic ossification of posterior longitudinal ligament (OPLL).</p><p><b>METHODS</b>Clinical information of 83 patients suffering from thoracic OLF and OPLL was reviewed retrospectively from January 2006 to June 2010. The related factors such as gender, age, preoperative and postoperative Japanese Orthopedic Association (JOA) score, pathological segment, type of thoracic OPLL, degree of thoracic kyphosis, anteroposterior diameter of OPLL, range of circumferential decompression, cerebrospinal fluid leakage or not and dysfunction or not and carotid lumbar disorders or not were analyzed by Chi-square and Logistic regression.</p><p><b>RESULTS</b>All cases were classified into desirable group (58 cases) and undesirable group (25 cases) based on the postoperative JOA score improvement rate. Comparison of physical characteristics between two groups of age, preoperative JOA and the course of the disease had not statistically significant (P > 0.05). Two groups in pathological segment of thoracic OPLL (χ(2) = 6.290, P = 0.043), the ossification type of OPLL (χ(2) = 5.361, P = 0.021) and dysfunction or not in preoperative (χ(2) = 27.711, P = 0.000) had significant difference. Logistic regression analysis showed that the upper thoracic segments (P = 0.044), beak type ossification (P = 0.023) and with dysfunction in preoperative (P = 0.009) were risk factors. There were 24 patients (28.9%) with cerebrospinal fluid leakage, 3 patients with early postoperative deep infection and neurological deterioration of 2 cases in postoperative.</p><p><b>CONCLUSIONS</b>Patients with ossification on the upper section of thoracic have a better prognosis, but the beaked localized longitudinal ligament ossification in patients and associated with preoperative dysfunction show a poor prognosis, combined jumping segmental ossification and cervical or lumbar severe disorders are the influencing factor for poor prognosis.</p>