Objective To assess the clinical characteristics of postoperative myocardial infarction (PMI) in patients undergoing off-pump coronary artery bypass grafting(OPCAB).Methods Two hundred and sixty-six patients undertook OPCAB in the Shandong Provincial Chest Hospital from January 2008 to June 2015 were selected,there were 22 cases clinical diagnosis of PMI as PMI group,44 cases patients whose general information matched MI group were selected as no PMI group.The data of two groups including preoperative records and postoperative symptoms,electrocardiogram (ECG),cTnI and echocardiography change were compared.Results There were no significant differences about preoperative indexes between the two groups(P ＞0.05).Incidences of severe chest pain and new pathological Q-waves and elevated ST segments were significantly higher in PMI group than those in no PMI group (90.9％ (20/22) vs.18.2％ (8/44),27.3％ (6/22) vs.4.5％(2/44),95.4％(21/22) vs.27.3％(12/44)),the differences were significant(P＜0.005).Peak serum levels of cTnI during the first 24 h after operation were significantly higher in patients of PMI group than those in no PMI group,the difference was significant((4.52±2.81) μg/L vs.(0.26±0.22) μg/L,P=0.04).There was no significant difference in the incidence of myocardial segmental motion.Conclusion It is difficult to predict coronary artery bypass grafting after myocardial infarction.It has great value of postoperative ECG,the patient complained in diagnosis of postoperative myocardial infarction.CTn is a very sensitive indicator,but its diagnosis clinical myocardial infarction boundary value still need to be open to question.

Objective To investigate the methods and effects in repairing fracture of the fifth metatarsal base bone with Acutrak headless compression screws.Methods From May 2006 to October 2012,75 patients with fracture of the fifth metatarsal base bone were reduced and fixed using Acutrak headless compression screws.There were 38 males and 37 females with a mean age of 36 years (range,21-65 years).Injury arose from fall from height (35 cases),road traffic accidents (23 cases),and fall of heavy objects (17 cases).Fracture of the left foot occurred in 29 cases and the right foot in 46 cases.Results were evaluated using American Orthopedic Foot and Ankle Society (AOFAS) ankle and midfoot score.Results Seventy-two patients were followed up for mean 15 months (range,13 months5 years).Operative incision obtained primary healing without any complications.Mean AOFAS ankle and midfoot score increased to (93.0 ± 6.5) points (range,79-100 points) at postoperative 1 year,compared with the preoperative (28.0 ± 3.9) points (range,0-42 points) (t =7.650,P ＜ 0.05).Muscle force and valgus or abduction of mid-forefoot of the affected and unaffected sides demonstrated no significant difference after operation.Conclusion Acutrak headless compression screw system shows advantages of rigid fixation,few complications,and early healing in treatment of the fifth metatarsal base fracture.

ObjectiveTo design a simple leg-sliding rehabilitation equipment for patients with lower limb dysfunction who need to exercise their leg muscles in bed at the early stage of rehabilitation. MethodsThe mechanism scheme was designed using the crank slider transmission system. The kinematic model was established and the structural dimensions were determined according to the human joint mobility, analysis and verification were then implemented; and the strutural strength of the machanism was verified, and based on the analysis, a protype was built to verify the feasibility of proposed scheme. ResultsThe range of joint activities of the proposed mechanism was in line with the normal human joint activities, the structural strength met the requirements, the prototype operated smoothly, and the actual running speed was basically consistent with the theoretical planning speed. ConclusionThis design could meet the needs of rehabilitation training for bedridden patients with lower limb dysfunction at the early stage of rehabilitation. It has the advantages of small size and light weight, which provides reference value for promoting the development of miniaturized and lightweight lower extremity rehabilitation equipment.