Hyperbaric oxygen therapy improves angiogenesis and bone formation in critical sized diaphyseal defects

Besides the use of autologous bone grafting several osteoconductive and osteoinductive methods have been reported to improve bone healing. However, persistent non‐union occurs in a considerable number of cases and compromised angiogenesis is suspected to impede bone regeneration. Hyperbaric oxygen therapy (HBO) improves angiogenesis. This study evaluates the effects of HBO on bone defects treated with autologous bone grafting in a bone defect model in rabbits. Twenty‐four New‐Zealand White Rabbits were subjected to a unilateral critical sized diaphyseal radius bone defect and treated with autologous cancellous bone transplantation. The study groups were exposed to an additional HBO treatment regimen. Bone regeneration was evaluated radiologically and histologically at 3 and 6 weeks, angiogenesis was assessed by immunohistochemistry at three and six weeks. The additional administration of HBO resulted in a significantly increased new bone formation and angiogenesis compared to the sole treatment with autologous bone grafting. These results were apparent after three and six weeks of treatment. The addition of HBO therapy to autologous bone grafts leads to significantly improved bone regeneration. The increase in angiogenesis observed could play a crucial role for the results observed. © 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 33:513–520, 2015.     

Varicocele anatomy during subinguinal microsurgical varicocelectomy in Chinese men

Knowledge of subinguinal microsurgical varicocelectomy is of fundamental importance to ensure that varicocele is resolved and testicular function is preserved. Our study aimed to describe the number of veins, arteries and lymphatics in the subinguinal spermatic cord and to clarify their differences between two sides, between patients with different complaints and between varicoceles with different clinical grades. A total of 102 consecutive patients underwent 162 primary subinguinal microsurgical varicocelectomies, during which the number of vessels with different diameters was recorded. A mean number of 12.9 internal spermatic veins, 0.9 external spermatic veins, 1.8 internal spermatic arteries and 2.9 lymphatics were identified per cord. 88.2% of the internal spermatic arteries were surrounded by a dense complex of adherent veins. The external spermatic vein or veins were found in 49.4% of the cases. The mean number of medium (1–3 mm in diameter) internal spermatic veins on the left was larger than that on the right (P < 0.001). The mean number of medium internal spermatic veins in grade III varicocele was larger than that in grade I or grade II (P < 0.015). There was no significant anatomical difference between the men presenting for infertility, chronic testicular pain and both the two complaints.     

How to select the lowest instrumented vertebra in Lenke type 5 adolescent idiopathic scoliosis patients?

BACKGROUND CONTEXTThe lowest instrumented vertebra (LIV) determination in Lenke type 5 Adolescent Idiopathic Scoliosis (AIS) requires a thorough understanding and prediction of the correction force on the LIV from coronal, sagittal, and axial plane. Although many LIV selection criteria have been reported, none of them comprehensively evaluated the multidimensional characteristics of the LIV till now.PURPOSETo develop and evaluate our LIV selection criteria in Lenke type 5 AIS patients using pedicle screw system via posterior approach.STUDY DESIGNA retrospective study.PATIENT SAMPLEAll consecutive patients with Lenke 5 curves who were treated with one-stage selective lumbar fusion using complete pedicle screw system in our center from January 2006 to December 2017, with minimum 2-year follow-up.OUTCOME MEASURESAge, gender and Risser grade, fused levels, operating time, intraoperative blood loss, complications, and Scoliosis Research Society (SRS)-22 questionnaires outcome were recorded. Coronal, sagittal, and axial parameters were measured from plain radiographs.METHODSA total of 138 consecutive patients with Lenke 5 curves treated with selective lumbar fusion were retrospectively analyzed, with minimum 2-year follow-up. Our LIV selection criteria include: (1) the most cephalad vertebrae touched by central sacrum vertical line (CSVL); (2) Nash-Moe rotation being equal or less than grade I on the standing AP radiograph; (3) CSVL cross between the two pedicles of LIV on concave bending film; (4) not at the apex of kyphosis. Radiographic data, operative data, perioperative complications and SRS-22 outcomes were collected and analyzed.RESULTSThe mean follow-up period was 50.9±24.7 months. The thoracolumbar/lumbar curve was corrected from 46.9°±8.9° before surgery to 5.5°±2.6° at the final follow-up. The C7-CSVL was 19.7±6.2 mm before surgery and 5.2±3.4 mm at the final follow-up. The LIV translation was corrected from 22.3 ±5.4 mm before surgery to 4.8 ± 2.6 mm at the final follow-up, with the correction rate of 78.4%. The LIV tilt was corrected from 21.6 ± 4.4° before surgery to 2.6 ± 2.3° at the final follow up, with the correction rate of 87.9%. Our LIV saved 0.3 level than SRS-last barely touching vertebra, 0.6 level than SRS-last substantially touching vertebra, 0.9 level than neutral vertebra, and 1.4 level than stable vertebra.CONCLUSIONThe present study indicates using our LIV criteria, our study achieved the correction rate of thoracolumbar/lumbar curve as 88.9%, with the rate of adding on or coronal imbalance as 8.7% (12/138). The criteria may provide important guidance for preoperative decision-making in Lenke 5 AIS patients, and more multicenter prospective studies with larger samples are needed to further validate the findings of this study.     

仿生矿化后的丝素电纺复合支架体内成骨性能的实验研究

目的:探讨仿生矿化后的丝素电纺复合支架体内修复颅骨缺损的能力。方法:利用静电纺丝技术制备丝素电纺支架(非矿化组),通过模拟体液(SBF)浸泡法对支架仿生矿化(矿化组),扫描电镜观察其微观形貌。18只8周龄的雄性SD大鼠购自南京医科大学动物实验中心,采用随机数字表示法分为3组,分别为矿化组、非矿化组和对照组,每组6只。构...     

急性下肢深静脉血栓手术取栓与介入取栓的疗效分析

目的 比较手术取栓与介入取栓治疗急性下肢深静脉血栓形成(DVT)的近、远期疗效.方法 回顾性分析2000年3月至2008年8月136例急性混合型和中心型DVT患者的临床资料.手术取栓组80例,其中男性30例,女性50例;年龄26-81岁,平均(58±14)岁.介入取栓组56例,其中男性25例,女性31例;年龄22～92岁,平均(57±17)岁.术后均局部应用尿激酶溶栓、肝素抗凝治疗,后期应用华法林抗凝6～12个月.结果 介入取栓组治疗后双大腿周径差小于手术取栓组[(0.8±1.3)cm比(1.5±1.7)cm,P=0.002],两组小腿周径差异无统计学意义[(0.7±1.1)cm比(1.0±1.1)cm,P=0.152].介入取栓组的平均住院时间少于手术取栓组[(7±4)d比(15 4-7)d,P=0.000].介入取栓组并发症发生率低于手术取栓组(8.9%比32.5%,P=0.000).108例获随访,随访率为79.4%.平均随访(46±29)个月,两组在大、小腿周径差、症状评分、色素沉着、静脉曲张、间歇性跛行及慢性溃疡的发生率等方面差异均无统计学意义(P>0.05).结论 介入取栓与手术取栓相比,远期疗效相当,近期疗效更佳,且住院时间短,并发症少.     

髋臼钛板加颗粒植骨治疗髋臼严重骨缺损

[目的]探讨髋臼钛板加颗粒植骨治疗髋臼严重骨缺损的临床效果。[方法]应用该技术治疗27例患者，髋臼骨缺损分型（AAOS分类）Ⅰ型6例，ⅡC型4例，Ⅲ型17例；术前髋关节Harris评分平均37分，术后根据临床及x线进行评估。[结果]所有患者均采用该方法重建髋臼，术后假体脱位1例，原因是重建钛板前倾过多与大粗隆发生撞击，经凿去部分粗隆骨质消除撞击因素后治愈。其余病例无并发症，平均随访3a，Harris评分平均87分。X线无1例患者的髋臼骨床、移植骨、重建钛板和聚乙烯内衬交界面出现透亮带。[结论]髋臼钛板加颗粒植骨可有效修复髋臼骨缺损，为假体提供坚强的初始固定，具有恢复髋关节旋转中心的作用。     

A novel mixture of propofol, alfentanil, and lidocaine for regional block with monitored anesthesia care in ophthalmic surgery

STUDY OBJECTIVE: The purpose of this study is to determine the efficacy and safety of sedation/analgesia using a mixture of propofol, alfentanil, and lidocaine. DESIGN: A retrospective case review was undertaken. SETTING: This study took place at a university medical center. PATIENTS: Eighty-nine American Society of Anesthesiologists physical status 1, 2, and 3 adult patients undergoing ophthalmic surgery with regional block and monitored anesthesia care were studied. INTERVENTION: Six milliliters of propofol, 2 mL of alfentanil, and 2 mL of 2% lidocaine (6-2-2 mixture) were freshly mixed. The bolus dose was determined based on the patients' age: 5 microg/kg of alfentanil (and 0.3 mg/kg of propofol) for patients older than 75 years; the dose increased 1 mug/kg per 10-year decrease in age; and up to 9 microg/kg of alfentanil (0.54 mg/kg of propofol) for patients younger than 45 years. Regional block was performed at 1 minute after bolus completion. Blood pressure (BP), Sa(O2), electrocardiogram, capnography, clinical signs of sedation, responses to block, need for airway support, nausea and vomiting (N/V), pain due to propofol infusion, recall, and patient and surgeon satisfaction were recorded. MEASUREMENTS AND MAIN RESULTS: Seventy-eight percent of patients achieved analgesia and sedation without adverse response to the block. Twelve percent achieved good analgesia and sedation with only eyebrow movement upon needle insertion. Twenty-seven percent had respiratory depression but were able to follow commands and maintain adequate ventilation. Two percent had brief apnea alleviated by chin lift or jaw thrust. None had pain because of propofol infusion or N/V. Before sedation, average systolic BP was significantly increased (P < 0.0001) compared with baseline. After sedation and block, systolic BP decreased 6% from baseline (P < 0.005). CONCLUSION: Adjusted for age and weight, the dose of the 6-2-2 mixture met the sedation requirements for most patients. With a low incidence of need for airway support, no pain during infusion, and no N/V, this novel mixture of propofol, alfentanil, and lidocaine provided adequate analgesia and sedation as well as hemodynamic stability for ophthalmic surgery under regional block.     

血浆同型半胱氨酸水平与血管性认知损害及海马体积的相关性研究

目的 探讨高同型半胱氨酸(Hcy)血症与海马体积及血管性认知功能损害的相关性.方法 采用病例对照研究,纳入脑梗死患者194例,所入选患者均测定血浆Hcy浓度,用脑磁共振三维测量方法测量海马体积,采用蒙特利尔认知评估量表(MoCA)进行认知测定,根据血浆Hcy水平分为正常Hcy组(血浆Hcy＜15 μmol/L,49例);Hcy轻度升高组(血浆Hcy 16～30μmol/L,78例);Hcy中重度升高组(血浆Hcy 31～100μmol/L,52例);Hcy重度升高组(Hcy＞ 100μmol/L,15例).结果 血浆Hcy不同水平组间认知功能MoCA总分差异有统计学意义(P＜0.05),血浆Hcy不同水平组间左、右侧海马体积差异有统计学意义(P＜0.05),血浆Hcy水平与认知功能MoCA总分呈负相关(r=-0.504,P＜0.05),血浆Hcy水平与左、右侧海马体积均呈负相关(r=-0.472,P＜0.05;r=-0.647,P＜0.05).左、右侧海马体积均与认知功能MoCA总分呈正相关(r=0.569,P＜0.05;r=0.671,P＜0.05).结论 高Hcy血症可能与脑梗死患者的海马体积缩小及认知损害相关.     

医患沟通在临床实践教学中的必要性

医学教学不仅是要将医学生培养成为专业独立的合格医生,更要培养医学生良好的医患沟通能力.与患者相沟通是医务工作者所必备的一种核心的临床能力,也是在医疗活动中以患者为中心的具体体现.因而在医学生临床实习的关键时期,树立较强的沟通意识十分必要,而带教教师更要结合学生自身的特点,找到每一位医学生行之有效的沟通方式,提高医患沟通的质量,从而建立和谐的医患关系.