In order to observe electrolyte changes before and after scheduled abdominal surgery and effect of prompt potassium supplement on the recovery of gastrointestinal function, electrolytes in 69 patients were tested before and after surgery, and the recovery of the gastrointestinal function was observed.The results showed that after surgery the levels of K＋, Na＋ and Cl＋ were decreased dramatically (Ｐ＜0.05) but still within the normal range, with no distinctive change in Ca２＋ and Mg２＋. No correlation between the amount of blood transfusion and potassium was detected. Prompt potassium supplement contributed to the quick recovery of gastrointestinal function.This suggests that with normal renal function, blood transfusion during the operation will not cause hyperkalemia, potassium supplement might begin on the first day when the patient begins to urinale.
目的探讨肝内胆管残留或再发结石的外科治疗方法及疗效。方法对1998年7月至2004年10月期间收治的96例肝内胆管残留或再发结石患者的资料进行回顾性分析。结果行肝叶切除44例； 肝段切除11例； 肝门部胆管切开并肝膈面实质切开联合取石引流术11例，其中附加胆肠大口径Roux-en-Y吻合术10例； 肝门部胆管整形、肝管空肠大口径Roux-en-Y吻合术30例。全组术中均采用胆道镜检查取石，术后经T管窦道检查取石6例。术后随访1~6年，76例（79.2%）无结石残留或再发。结论据结石部位及肝脏病变合理选择手术方法是有效治疗肝内胆管残留或再发结石的较好方法。
目的 探讨胰腺良性微小肿瘤的术前及术中定位方法。方法 对1995年1月至2000年8月收治的12例直径lt;2 cm的胰腺良性肿瘤定位方法进行分析。结果 术前B超、CT或MRI和动脉造影的诊断敏感性分别是16.7%、40.0%和87.5%。通过术中探查发现病灶7例（58.3%），其余5例借助于术中B超定位成功4例。结论 术中B超是目前最有价值的定位手段，而且还能提供病灶更详细的资料，对顺利完成手术、减少并发症有重要作用。在定位过程中注意操作细节可提高定位诊断的成功率。
Heart rate variability (HRV) is the difference between the successive changes in the heartbeat cycle, and it is produced in the autonomic nervous system modulation of the sinus node of the heart. The HRV is a valuable indicator in predicting the sudden cardiac death and arrhythmic events. Traditional analysis of HRV is based on a multi-electrocardiogram (ECG), but the ECG signal acquisition is complex, so we have designed an HRV analysis system based on photoplethysmography (PPG). PPG signal is collected by a microcontroller from human’s finger, and it is sent to the terminal via USB-Serial module. The terminal software not only collects the data and plot waveforms, but also stores the data for future HRV analysis. The system is small in size, low in power consumption, and easy for operation. It is suitable for daily care no matter whether it is used at home or in a hospital.