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@# Objective To explore the difference in lumbar proprioception between the youth and the elderly, and the male and the female. Methods From September to November, 2017, 58 elderly aged 65 to 80 years and 56 youth aged 20 to 30 years were randomly picked up from the community. Their lumbar proprioceptions were measured by Con-Trex isokinetic dynamometer. The absolute error angles of lumbar flexion and extension in passive replication test was used to assess lumbar proprioceptive function. Results The absolute error angles of passive replication test were less on youth proprioception than on elderly ones (t > 4.218, P < 0.001), either in men or women (t > 2.844, P < 0.001), and was not different between men and women neither in the elderly group nor in the youth group (t < 1.473, P > 0.05). Conclusion The lumbar proprioception in the elderly was obviously inferior to that of the youth, both men and women. There was no gender difference between men and women in lumbar proprioception, both elderly and youth.
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Objective To determine whether polarized arrest using adenosine and lidocaine cold crystalloid cardioplegia would give satisfactory myocardial protection in the cardiac surgery of experimental animals.Methods Twelve pigs were randomized divided into 2 groups (n =6) to receive adenosine-lidocaine cardioplegia or St.Thomas cardioplegia.Left ventricular systolic and diastolic function,cardiac output,cardiac troponin 1 were monitored at before operation (T1),1 hour after crossclamp was removed (T2) and 2 hours after cross-clamp was removed (T3).After T3 the left ventricular ultrastructure was observed,mitochondrial ultrastructure was analyzed by CMIAS image system.Results There were no statistical differences between the two groups in T1.The left ventricular systolic pressure,± dp/dt and cardiac output in adenosine-lidocaine group wasmuch higher than St.Thomas group in T2 and T3,meanwhile the left ventricular diastolic pressure,capillary wedge pressureand cardiac troponin Ⅰ value was lower than St.Thomas group.The hemodynamic values was more stable in adenosine-lidocaine group.St.Thomas group got more myocardial injury alterations in intracellular structure than adenosine-lidocaine group.The image analysis of mitochondrial ultrastructure shows St.Thomas group got lower shape factor,higher area density and perimeter density compared with baseline and adenosine-lidocaine group values.Conclusion Adenosine-lidocaine cold crystalloid car-dioplegia gave satisfactory cardiac arrest,got better myocardial protection than St.Thomas cardioplegia.
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Objective To evaluate the results of a modified linear plieatinn of left ventricular aneurysms during off-pump coro- nary artery bypass surgery,Methods From January 2001 to June 2006,206 patients were operated on for nonruptured postinfarefion left ventrieular aneurysm during off-pump coronary artery bypass surgery.Repair was completed on the beating heart to minimize isch- emia and allowed assessment of wall function and viability.All patients presented with symptoms of angina and congestive heart failure or ventricular arrhythmia.The NYHA functional class of the patients ranged from grade 1]to grade IV.Preoperative ejection fraction and left ventricular end-diastolic diameter were 0.41?0.06 and(57.4?6.8)mm.The ventricular preoperative and postoperative performances were compared.Results Hospital mortality was 0.5 %(1/206).Coronary artery bypass was performed with an average of 2.9?0.9 grafts per patient.At the time of follow-up,all the patients had no symptoms.The mean NYHA class and ejection frac- tion increased significantly(P
