Objective To analyze the symmetry of multifocal visual evoked potential (mfVEP) between both eyes in normal subjects. Methods The monocular mfVEP of both eyes in thirty-six normal subjects (72 eyes) was tested with VERIS Science 4.0. The stimulus was the pattern reversal dart array consisted of 60 sectors each included 16 black-white reverse patterns. The visual stimulation was controlled by the binary pseudo-random m-sequences and subtended approximately 25 degrees. Results There existed no statistically significant difference of P1 latencies and amplitudes between correspondent quadrant visual field of both eyes. The data difference of the ipsilateral quadrant visual fields was greater than those of the correspondent quadrant visual field. The comparison among four quadrant visual fields in right eye or left eye each showed that there was statistically significant difference of P1 latencies between the superionasal quadrant visual field and inferiotemporal or inferionasal quadrant visual fields. Conclusions The symmetry of normal mfVEP is more dominant in retina than that in visual cortex. (Chin J Ocul Fundus Dis, 2006, 22: 42-44)
目的 讨论糖尿病远端对称性多发性神经病变（DSPN）的筛查对减少糖尿病足溃疡发生的作用及护理方法。 方法 2011年5月－2012年2月对137例入选患者进行神经病变症状筛查和体征检查，并根据患者神经传导功能检查（NCS）结果作出最终诊断，由专职糖尿病足护士和健康教育护士给予患者针对性的预防教育和护理指导。 结果 根据神经病变症状、5项体征检查及NCS结果，确诊74例（54.01%），临床诊断4例（2.91%），疑似10例（7.30%），亚临床8例（5.84%），无41例（29.93%）。 结论 强调最好通过临床问诊和体格检查来达到早期筛查、早期发现，并由专科护士针对性地指导患者采取有效的足部管理和预防措施,从而预防糖尿病足部溃疡的发生。
【摘要】 目的 探讨双眼散光轴向的关系。 方法 随机选取2010年1—12月预行准分子激光原位角膜磨镶术（laser in situ keratomileusis，LASIK）手术患者200例400只眼（散光gt;-0.50 D），收集全眼散光和角膜散光轴向，定性和定量分析双眼散光轴向的关系。 结果 ①定性分析：双眼全眼散光性质相同病例在电脑验光仪结果中占92.5%，在综合验光仪结果中占95.0%；双眼角膜散光性质相同病例在电脑验光仪结果中占95.5%，在角膜地形图结果中占97.5%。②定量分析：双眼全眼散光在电脑验光仪结果中对称者为36.5%，近似对称为25.0%，非对称为38.5%；在综合验光仪结果中对称者为50.5%，近似对称为19.5%，非对称为30.0%。双眼角膜散光在电脑验光仪结果中对称者为37.0%，近似对称为31.5%，非对称为31.5%；在角膜地形图结果中对称者为43.0%，近似对称为32.0%，非对称为25.0%。双眼散光轴向对称性指数的中位数在4种检查结果中分别为：8、6、8、6。 结论 双眼的全眼和角膜散光在轴向方面都具有同质性，并且具有对称或近似对称趋势。【Abstract】 Objective To analyze the relationship between binocular astigmatism axes. Methods This study included 400 eyes of 200 patients treated by laser in situ keratomileusis (LASIK) between January and December 2010, whose astigmatic degrees were greater than -0.5 D. We collected astigmatic axles coming from either whole eye or cornea. The relationship between binocular astigmatism axes was analyzed qualitatively and quantitatively. Results ① Qualitative analysis: cases of total astigmatism axis with similar quality in autorefraction took up 92.5%, and 95% in subjective refraction. Cases of cornea astigmatism axis with similar quality in autorefraction took up 95.5%, and 97.5% in cornea topography. ② Quantitative analysis: in autorefraction, cases of total astigmatism axes were symmetrical in 36.5%, approximately symmetrical in 25%, and dissymmetrical in 35% of the subjects. In subjective refraction, 50.5% showed symmetry, 19.5% approximate symmetry, and 30% dissymmetry. In autorefraction, cases of cornea astigmatism axis were symmetrical in about 37%, approximately symmetrical in 31.5%, and dissymmetrical in 31.5% of the patients. In cornea topography, 43% of the cases were symmetrical, about 32% were approximately symmetrical, and 25% were dissymmetrical. The middle numbers of the symmetrical index for the four kinds of examinations were respectively 8, 6, 8, and 6. Conclusion The total astigmatism axis and the binocular astigmatism axis of cornea have the characteristic of homogeneity, also the trend of symmetry.
ObjectiveTo explore the techniques and short-term effectivness of contralateral breast symmetrization mammaplasty in breast reconstruction. MethodsBetween February 2014 and December 2015, 11 patients received immediate or delayed breast reconstruction after nipple-sparing mastectomy (6 and 5 cases respectively) for contralateral breast symmetrization mammaplasty. The age ranged 36-55 years (mean, 45 years). The disease duration was from 7 days to 6 months (mean, 2.5 months) in 6 patients undergoing immediate breast reconstruction. According to tumor TNM staging, 2 cases were rated as TisN0M0, 3 cases as T1N0M0, and 1 case as T2N0M0. The duration was from 2 to 25 years (mean, 8 years) in 5 patients undergoing delayed breast reconstruction. The implant (7 cases) and latissimus dorsi (4 cases) were used for breast reconstruction; and breast augmentation (6 cases) and breast reduction (5 cases) were performed for contralateral breast symmetrization. ResultsOne patient had local poor wound healing postoperatively and was cured; primary healing was obtained in the other patients, and no other postoperative complication of infection, implant exposure or capsular contracture was found. The patients were followed up 3 to 24 months (mean, 12 months). The reconstructive outcomes were excellent in 9 cases and good in 2 cases, with an excellent and good rate of 100%. There was no recurrence or metastasis. ConclusionSimultaneous contralateral symmetrization with augmentation/reduction mammaplasty after breast reconstruction can obtain satisfactory symmetric outcomes.
ObjectiveTo analyze the asymmetry of posterior-anterior radiograph of patients with facial asymmetry after orthodontic and surgical treatment. MethodsWe retrospectively analyzed the clinical data of 50 patients with varying degrees of facial asymmetry treated with orthodontic and surgical methods between June 2013 and June 2014. The asymmetric rate of posterior-anterior radiograph of the patients before and after treatment were compared with that of another 50 healthy subjects. ResultsMaxillary indexes including L2, L3, L4, L5, L6, L7, L8, L9, and L10 asymmetric rates of the patients were significantly different from those of the normal subjects (P < 0.05); L3, L6, L7 and L10 asymmetric rates were significantly different before and after treatment (P < 0.05). Mandibular indexes including L1, L3, L4, L5, L6, L7, L8, L9, and L10 asymmetric rates were significantly different from normal indicators (P < 0.05); L1, L3, L4, L5, L6, L7, L8, L9, and L10 asymmetric rates changed significantly after treatment (P < 0.05). ConclusionClinical facial asymmetry mainly manifests on the bottom 1/3 part of the face, and facial mandibular asymmetry is the most obvious.
ObjectiveTo discuss the security and effectiveness of fixing the unstable region of sagittal injured unit symmetrically with pedicle screws combined with bone graft fusion for treating thoracolumbar fractures.MethodsA series of 65 patients with a single level thoracolumbar fracture between November 2011 and November 2015 were included in the study. There were 41 males and 24 females with an average age of 36.7 years (range, 23-60 years). The fracture segments included T7 1 case, T9 in 2 cases, T10 in 4 cases, T11 in 8 cases, T12 in 14 cases, L1 in 19 cases, L2 in 13 cases, L3 in 3 cases, and L4 in 1 case. According to AO classification, there were 34 cases classified as type A, 27 cases type B, and 4 cases type C. The neurological function was evaluated by American Spinal Injury Association (ASIA) grade score, there were 1 case at grade A, 2 cases grade B, 6 cases grade C, 15 cases grade D, and 41 cases grade E. The thoracolumbar injury severity score (TLICS) was 4 in 9 cases, 5 in 29 cases, 6-8 in 23 cases, 9-10 in 4 cases. The time form injury to operation was 2-12 days (mean, 5.3 days). The fractured vertebra, along with the superior and inferior discs were defined as a injured unit and divided into three parts on the sagittal position: region Ⅰ mainly including the superior disc, cephalic 1/3 of injured vertebra, and posterior ligamentous complex as to oppose; region Ⅱ mainly including the middle 1/3 of injured vertebra, pedicles, lamina, spinous process, and supraspinal ligament; region Ⅲ mainly including the inferior disc, caudal 1/3 of injured vertebra, and posterior ligamentous complex as to oppose. The unstable region was defined as the key injured region of the vertebra. Pedicle screws were fixed symmetrically and correspondingly with bone grafting to treat thoracolumbar fractures. The neurological status, ratio of anterior body height, and sagittal Cobb angle were collected at preoperation, immediate after operation, and last follow-up to evaluate surgical and clinical outcomes.ResultsAll patients accepted operation safely and were followed up 12-24 months (mean, 17.3 months). Cerebrospinal fluid leakage occurred in 3 patients, and cured by symptomatic treatment. There was no complications such as loosening, displacement, and breakage of internal fixator. Bony fusion was achieved in all patients at 10-13 months (mean, 11.4 months) after operation. At last follow-up, according to ASIA grading, 1 case was grade A, 1 grade B, 3 grade C, 9 grade D, and 51 grade E, showing significant difference when compared with preoperative data (Z=–2.963, P=0.014). The ratio of anterior body height at preoperation, immediate after operation, and last follow-up were 53.2%±6.8%, 91.3%±8.3%, 89.5%±6.6% respectively; and the sagittal Cobb angle were (16.3±8.1), (2.6±7.5), (3.2±6.8)° respectively. The ratio of anterior body height and the sagittal Cobb angle at immediate after operation and at last follow-up were significantly improved when compared with preoperative values (P<0.05), but no significant difference was found between at immediate after operation and at last follow-up (P>0.05).ConclusionIt is safe and reliable to treat thoracolumbar fractures under the principle of fixing the unstable region of injured unit symmetrically with pedicle screws combined with bone grafting.
ObjectiveTo introduce a contralateral mastoplasty in breast reconstruction with prosthesis after breast cancer surgery in order to gain bilateral breasts symmetry.MethodsBetween January 2016 and June 2018, 11 female patients with breast cancer were treated, aged 34-64 years old (mean, 49.6 years). There were 5 cases in left side and 6 cases in right side. There were 3 cases of invasive carcinoma and 8 cases of intraductal carcinoma. The diameter of tumor was 0.2-4.1 cm (mean, 2.5 cm). The disease duration ranged from 1 to 15 months (mean, 6 months). According to Regnault grading criteria, there were 7 cases of mild breast ptosis and 4 cases of moderate breast ptosis. Simple nipple-sparing mastectomy and reconstruction using prosthesis of the affected side, and folding and lifting of the nipple-areolar complex of the healthy side were performed.ResultsThe operation time was 144-188 minutes (mean, 158 minutes). The hospital stay was 6-9 days (mean, 7.5 days). Postoperatively, poor incision healing occurred in 1 case and healed after symptomatic treatment. The other incisions healed well and no surgical-related complications occurred. All patients were followed up 6-30 months (mean, 16 months). At 3 months after operation, the expert group adopted the self-made rating scale to evaluate the bilateral breasts symmetry, and the score was 8-10 (mean, 8.9). The patients were evaluated for their satisfaction according to the self-made score scale, and the score was 8-10 (mean, 9.1).ConclusionAfter immediate breat reconstruction with prosthesis after breast cancer surgery, the satisfied bilateral breasts appearances and symmetry can be obtained by contralateral mastoplasty.
A software and hardware platform for gait simulation and system evaluation for lower limb intelligent prosthesis is proposed and designed, in order that the wearable symmetry effect of the intelligent knee prosthesis can be quantitatively analyzed by machine test instead of human wear test. The whole-body three-dimensional gait and motion analysis system instrument, a device to collect gait data such as joint angle and stride of adults, was used for extracting simulated gait characteristic curve. Then, the gait curve was fitted based on the corresponding joint to verify the feasibility of the test platform in the experiment. Finally, the developed artificial knee prosthesis was worn on the prosthetic evaluation system to quantitatively analyze the gait symmetry effect. The results showed that there was no significant difference in gait symmetry between the developed knee joints at different speeds, which could reach more than 88%. The simulation and evaluation of the prosthetic gait have good effects on the functional simulation and evaluation of the lower limb intelligent prosthesis.
ObjectiveTo explore the gait trajectory characteristics and effectiveness after unicompartmental knee arthroplasty (UKA).MethodsThirty patients (30 knees) with anterior medial compartment osteoarthritis who were treated with UKA between January 2017 and December 2018 were selected as subjects (UKA group). According to age, gender, and side, 30 patients (30 knees) with knee osteoarthritis treated with total knee arthroplasty (TKA) were selected as control (TKA group). In addition to the range of motion (ROM) before operation showing significant difference between the two groups (t=4.25, P=0.00), there was no significant difference in gender, age, disease duration, sides, body mass index, and preoperative hip-knee-ankle angle (HKA), Western Ontario and McMaster University Osteoarthritis Index (WOMAC) score between the two groups (P>0.05). The incision length, drainage volume within 24 hours after operation, and the changes of hemoglobin and albumin were recorded. The WOMAC score, ROM, and HKA before and after operation were compared between the two groups. At 1 year after operation, the gait trajectory characteristics of two groups were analyzed by Vicon three-dimensional gait capture system, and the absolute symmetry index (ASI) of the lower limbs of the two groups was calculated.ResultsThe incisions of the two groups healed by first intention, with no complications. The incision length, drainage volume within 24 hours, and the changes of hemoglobin and albumin after operation in the UKA group were significantly smaller than those in the control group (P<0.05). All patients were followed up completely, the follow-up time ranged from 13 to 20 months of UKA group (mean, 18 months) and 16 to 24 months of control group (mean, 20 months). The imaging review showed that the lower limb alignment of the two groups were restored to a neutral position, and the position of prosthesis was good. At 1 year after operation, the WOMAC score, HKA, and ROM of two groups were significantly improved when compared with those before operation (P<0.05); the postoperative WOMAC score and ROM of the UKA group were significantly better than those of the control group (P<0.05), and there was no significant difference in HKA between the two groups (t=1.54, P=0.13). Gait analysis at 1 year after operation showed that the walking speed, stride length, knee extension at mid-stance, and flexion at swing in the UKA group were significantly better than those in the TKA group (P<0.05); there was no significant difference in cadence, knee flexion at initial contact, and knee flexion at loading response between the two groups (P>0.05). The ASI of bilateral knee flexion in the UKA group was significantly greater than that in the TKA group during the initial contact and loading response period (P<0.05).ConclusionCompared with TKA, UKA has the advantages of small incision, less blood loss, and quicker functional recovery. The early gait after UKA is mainly manifested as the increase in walking speed, stride length, knee flexion at swing, and extension at mid-stance phase. From the analysis of gait symmetry, during the initial contact and loading response phase, the operation side after UKA undertakes more shock absorption and joint stabilization functions than the contralateral side.