稳定表达人骨形成蛋白-2基因的成纤维细胞体内诱导成骨作用

目的 探讨稳定表达人骨形成蛋白—2(hBMP—2)基因的成纤维细胞是否具有体内诱导成骨能力。方法 构建置组真核表达载体pcDNA3—hBMP—2，在脂质体介导下，将其导入NIH3T3细胞，通过G418馈选获得阳性克随，并继续培养4周，用细胞原位杂交和免疫组织化学方法观察hBMP—2基因在NIH3T3细胞内的稳定表达，并观察了稳定表达hBMP—2的成纤维细胞碱性磷酸酶(ALP)活性的变化，将稳定表达hBMP—2的成纤维细胞植入裸鼠肌袋内观察其体内诱导成骨作用。结果 成功构建重组真核表达载体pcDNA3—hBMP—2，经细胞原位杂交和免疫组织化学证实，转染pcDNA3—hBMP—2后的NIH3T3细胞内有大量hBMP—2mRNA的转录及其蛋白的稳定表达，稳定表达hBMP—2的成纤维细胞ALP活性显著上升，植入裸鼠肌袋内4周有大量软骨形成。结论 稳定表达hBMP—2的成纤维细胞具有体内诱导成骨能力。     

骨形态发生蛋白-2基因活化纳米骨浆修复兔桡骨缺损的实验研究

目的观察骨形态发生蛋白-2（BMP-2）基因活化纳米骨浆在损伤部位的局部成骨基因表达和骨缺损重建修复效果。方法新西兰白兔54只，其中48只实验动物随机分成三组（每组16只32侧），制成双侧桡骨中段15mm骨缺损模型。A组：注入hBMP-2＋纳米骨浆；B组：注入空白质粒＋纳米骨浆；C组：注入纳米骨浆。另6只动物制作左桡骨中段骨缺损，不植入材料，作为空白对照。术后4、8和12周取材行影像学检查、组织学观察、分子生物学检测和生物力学检测。结果术后12周A、B和C组骨缺损均修复，A组骨缺损处有明显BMP-2的mRNA和蛋白质表达，在ALP水平、成骨速度、新生骨量及新生骨力学强度等方面均明显优于B、C两组（P〈0．05）。空白对照组骨缺损无愈合。结论纳米骨浆复合BMP-2质粒后，具有一定骨诱导作用，植入体内后成骨速度、质量及力学强度较单纯的纳米骨浆明显增强，能够有效修复骨缺损。     

骨形成蛋白-2基因转染人骨髓间质干细胞诱导异位成骨的实验研究

目的 评价腺病毒介导的人骨形成蛋白—2基因(Adv—hBMP—2)转染人骨髓间质干细胞(MSCs)的诱导成骨能力。方法 从人骨髓中分离培养获取MSCs，分为三组：①Adv—hBMP—2转染细胞组；②Adv—βgal转染细胞组；③未转染细胞组。分别于体外行western immunoblot试验、碱性磷酸酶(ALP)和Von Kossa染色、ALP定量测定，以及裸鼠肌内诱导成骨试验。共9只裸鼠，双例股后肌群内注射，每组6例。结果 Adv—hBMP—2组MSCs可分泌BMP—2蛋白；转染后第9天ALP染色多数细胞为阳性，其它两组ALP染色阳性细胞少见；ALP活性第3天开始升高，12天达高峰为14．76单位，与其它两组比较有统计学意义(P＜0．05)；于第21天后出现钙结节，而其它两组未见。裸鼠肌内注射后4周Adv—hBMP—2组X线片均有异位成骨，Adv—βgal转染细胞组未见明显成骨，未转染细胞组仅有少量骨形成。组织学检查发现：Adv—hBMP—2组也可见典型的板层骨和骨髓腔形成，Adv—βgal组主要为纤维组织，未转染组也可见散在骨小粱形成。结论 Adv—hBMP—2基因转染可诱导人骨髓问质干细胞成骨。     

脱钙骨基质/磷酸钙复合骨水泥骨诱导活性观察

目的：观察磷酸钙骨水泥（CPC）中加入脱钙骨基质（DBM）后形成的复合骨水泥的成骨诱导活性。方法：将DBM/CPC复合骨水泥分别植入兔背肌肌袋内，于不同时间取材，通过组织学切片、ALP等手段观察异位诱导成骨情况。结果：术后2周，DBM/CPC复合骨水泥组可见间充质细胞增殖、聚集并包绕DBM骨粒。4周时，DBM已有部分吸收，并软骨样细胞和软骨样组织包裹。8周，DBM进一步吸收，软骨细胞和软骨组织逐渐成熟，新骨形成。12周，DBM吸收并被新骨组织部分或大部分代替且相互连接成片。ALP测定结果与组织学观察的新骨形成情况基本一致。结论：DBM/CPC复合骨水泥有较强的异位诱导成骨能力，诱导新骨的形成伴随着材料的降解，可以有效弥补单纯使用CPC时降解速度太慢和无骨诱导能力的不足。     

组织工程骨软骨复合物的构建与形态学观察

目的探讨采用组织工程技术构建骨软骨复合物的可行性。方法将骨髓基质细胞(BMSCs)成诱导软骨后接种于快速成形的三维支架材料聚乳酸／聚羟乙酸共聚物(PLGA)构建组织工程软骨，经成骨诱导的BMSCs接种于聚乳酸／聚羟乙酸共聚物／磷酸三钙(PLGA／TCP)构建组织工程骨，在体外分别培养2周后，将两种工程化组织及两者以无损伤线缝合形成的组织工程骨软复合体分别植入自体股部肌袋，术后8周取材，行组织学观察。结果术后组织学观察表明。组织工程软骨在体内可形成软骨组织组织工程骨在体内可形成骨组织，两者的复合体在体内可形成骨软骨复合物。结论以骨髓基质细胞为种子细胞、以快速成形的生物降解材料为支架体外构建的组织工程骨软骨复合物，可在体内形成骨软骨组织，有望用于骨软骨缺损的修复。     

完全脱蛋白骨复合rhBMP2构建人工骨及其体内异位成骨

目的: 探讨异种完全脱蛋白骨复合基因重组骨形态发生蛋白(rhBMP2) 在体外构建人工骨的可行性,并对其体内异位成骨进行评估。方法: 体外将兔骨髓基质细胞进行成骨诱导, 然后接种复合rhBMP2的小牛完全脱蛋白骨, 构建组织工程骨, 植入自体大腿肌袋内, 术后4、8周处死动物分别进行常规组织学检查、碱性磷酸酶活性测定、折弯力学测试, 观测这种组织工程骨在体内的异位成骨作用。结果: 这种方法构建和组织工程骨在体内异位成骨效应显著且抗折能力较强。结论: 异种完全脱蛋白骨复合rhBMP2可作为骨组织工程支架材料, 这种组织工程骨在体内的成骨能力随植入时间的延长而增加。     

兔腱内与界面诱导成骨促进腱-骨愈合

[目的]探讨移植物成骨化诱导骨性连接促进肌腱-骨隧道(简称腱-骨)界面愈合的作用。[方法] 50只新西兰兔,其中30只一侧半腱肌肌腱内注入BMP愈合模型,一侧行肌腱移植物和腱-骨界面联合应用BMP(界面处理),对侧界面注射等量PBS为对照。采用X线片、大体解剖观察和组织形态学计量检测研究肌腱组织成骨化情况。[结果]术后12周时腱内处理侧肌腱组织H.E染色及Masson染色可见肌腱纤维内细胞增生明显,局部形成骨小梁样组织,部分区域还可见软骨样细胞存在。X线片检测结果显示肌腱组织钙化程度随术后时间延长而不断增加,肌腱组织钙化范围明显增大[4周:(5.51±0.45)mm~2;8周:(9.44±0.40) mm~2;12周:(20.26±0.98) mm~2,P0.01]。此外,肌腱组织高密度区域IOD值也随时间增加而显著增高[4周:(1178.56±62.71);8周:(2135.26±90.92);12周:(4726.72±374.41),P0.01]。术后12周时界面处理侧大体解剖观察可见肌腱移植物质地变硬,与周围骨组织紧密连接、局部融合。H.E染色和Masson染色结果显示肌腱移植物内部及腱-骨界面之间均可见新生骨组织形成,部分区域内新生骨组织与宿主骨组织形成骨性连接。处理侧与对照侧之间腱-骨界面愈合程度组织学评分差异有统计学意义[(6.60±0.77) vs(2.67±0.68),P 0.01]。[结论] BMP可诱导肌腱内骨化,并促进腱-骨界面形成骨性连接。     

脱钙骨基质/磷酸钙复合骨水泥骨诱导活性观察

目的:观察磷酸钙骨水泥(CPC)中加入脱钙骨基质(DBM)后形成的复合骨水泥的成骨诱导活性.方法:将DBM/CPC复合骨水泥分别植入兔背肌肌袋内,于不同时间取材,通过组织学切片、ALP等手段观察异位诱导成骨情况.结果:术后2周,DBM/CPC复合骨水泥组可见间充质细胞增殖、聚集并包绕DBM骨粒.4周时,DBM已有部分吸收,并软骨样细胞和软骨样组织包裹.8周,DBM进一步吸收,软骨细胞和软骨组织逐渐成熟,新骨形成.12周,DBM吸收并被新骨组织部分或大部分代替且相互连接成片.ALP测定结果与组织学观察的新骨形成情况基本一致.结论:DBM/CPC复合骨水泥有较强的异位诱导成骨能力,诱导新骨的形成伴随着材料的降解,可以有效弥补单纯使用CPC时降解速度太慢和无骨诱导能力的不足.     

脱钙骨基质/磷酸钙复合骨水泥骨诱导活性观察

目的:观察磷酸钙骨水泥(CPC)中加入脱钙骨基质(DBM)后形成的复合骨水泥的成骨诱导活性。方法:将DBM/CPC复合骨水泥分别植入兔背肌肌袋内,于不同时间取材,通过组织学切片、ALP等手段观察异位诱导成骨情况。结果:术后2周,DBM/CPC复合骨水泥组可见间充质细胞增殖、聚集并包绕DBM骨粒。4周时,DBM已有部分吸收,并软骨样细胞和软骨样组织包裹。8周,DBM进一步吸收,软骨细胞和软骨组织逐渐成熟,新骨形成。12周,DBM吸收并被新骨组织部分或大部分代替且相互连接成片。ALP测定结果与组织学观察的新骨形成情况基本一致。结论:DBM/CPC复合骨水泥有较强的异位诱导成骨能力,诱导新骨的形成伴随着材料的降解,可以有效弥补单纯使用CPC时降解速度太慢和无骨诱导能力的不足。     

hBMP-2转染自体兔骨髓基质细胞附和异体兔脱钙骨基质的成骨实验研究

目的　探讨人骨发生蛋白 2 (hBMP - 2 )转染兔自体骨髓基质细胞 (rMSCs)的骨生成诱导作用以及附和异体兔脱钙骨基质 (DBM )后的成骨效能。方法　取兔自体骨髓基质细胞培养扩增 ,用脂质体介导的方法转染人骨发生蛋白 2基因 ,将转染和未转染人骨发生蛋白 2基因的自体骨髓基质细胞附和于异体兔脱钙骨基质形成新的生物植骨材料 ,连同空白及单纯脱钙骨基质对照组植入兔前肢肌袋和桡骨缺损。 2、 4、 6、 8周分别取材进行大体、放射线和病理观察。结果　肌袋试验 6周后 ,转染人骨发生蛋白 2基因的自体骨髓基质细胞附和异体兔脱钙骨基质材料中出现骨组织细胞 ,未转染组和单纯异体兔脱钙骨基质组为纤维组织。骨缺损试验中 ,三组均能产生骨的形成和缺损的修复 ,但仍然是转染复合材料组的骨修复再生能力最大。结论　局部应用hBMP - 2基因转染的rMSCs-DBM材料可以诱导骨形成促进骨修复     

Long-term follow-up of callotasis lengthening of the capitate after resection of the lunate for the treatment of stage III lunate necrosis

The callotasis lengthening technique was used to gradually lengthen the capitate after resection of the lunate in stage IIIa necrosis in 23 patients. Results of ten patients with a follow-up of at least 5 years showed rapid and sufficient callus formation in every patient regardless of age. The callotasis lengthening modification of the Graner II operation provides all advantages and avoids the major inconvenience of the traditional Graner II operation. There was no increased rate of disturbed fracture healing. Results of the DTPA-gadolinium MRI study did not show any significant impairment of vascularization within the region of the capitate bone. With the “intrinsic bone formation,” contrary to every other intercarpal arthrodesis at the wrist, there is no need for an additional bone graft.     

Vasoconstrictor effect of cyclosporin on the mesenteric artery in the dog

To evaluate the effect of cyclosporin (CyA) on the mesenteric arterial bed, studies were performed on the isolated mesenteric artery perfused at a constant flow in 20 dogs. Changes in mesenteric perfusion pressure reflected variations in vascular resistance. Pure powder CyA was dissolved in autologous blood and injected at doses of 5, 10, 20 and 40 mg. Infusions of 5 and 10 mg CyA caused nonsignificant mean increases of 3±2 mm Hg [95% confidence interval (CI)-2 to +7; P>0.05] and 3±3 mm Hg (95% CI-3 to +9; P>0.05) in mesenteric perfusion pressure, with CyA blood levels in the mesenteric vein averaging 466±153 and 692±130 nmol/l, respectively, at the end of the injections. Infusions of 20 and 40 mg CyA caused significant increases in mesenteric perfusion pressure averaging 11±3 mm Hg (95% CI 3–18; P<0.05) and 26±4 mm Hg (95 % CI 16–34; P<0.05), respectively. CyA blood levels at the end of infusion averaged 806±85 and 1118±89 nmol/l, respectively, in the mesenteric vein. Blockade of alpha-adrenergic receptors with phentolamine abolished the CyA vasoconstriction of the mesenteric artery, with the increase in perfusion pressure averaging 16±4 mm Hg before and 3±3 mm Hg after phentolamine (P<0.05). Thus, in the dog, CyA causes an acute vasoconstriction of the mesenteric artery through stimulation of alpha-adrenergic receptors.     

Magnetic resonance imaging for the evaluation of rejection of a kindney allograft in the rat

Orthotopic DA (RT1^a) into Lewis (RT1¹) rat kidney allografts and control Lewis-into-Lewis grafts were assessed by magnetic resonance imaging (MRI) and perfusion measurement after intravenous injection of a superparamagnetic contrast agent. MRI anatomical scores (range 1–6) and perfusion rates were compared with graft histology (rank of rejection score 1–6). Not only acute rejection, but also chronic events were monitored after acute rejection was prevented by daily cyclosporine (Sandimmune) treatment during the first 2 weeks after transplantation. In acute allograft rejection (n=11), MRI scores reached the maximum value of 6 and perfusion rates were severely reduced within 5 days after transplantation; histology showed severe acute rejection (histologic score 5–6). In the chronic phase (100–130 days after transplantation), allografts (n=5) manifested rejection (in histology cellular rejection and vessel changes), accompanied by MRI scores of around 2–3 and reduced perfusion rates. Both in the acute and chronic phases, the MRI anatomical score correlated significantly with the histological score (Spearman rank correlation coefficient r _s 0.89, n=30, P<0.01), and perfusion rates correlated significantly with the MRI score or histological score (r _s values between-0.60 and -0.87, n=23, P<0.01). It is concluded that MRI represents an interesting tool for assessing the anatomical and hemodynamical status of a kidney allograft in the acute and chronic phases after transplantation.     

The Classic: Hospital for the Cure of Deformities: Course of Lectures on the Deformities of the Human Frame

This Classic Article is a reprint of the original work by W.J. Little, Hospital for the Cure of Deformities: Course of Lectures on the Deformities of the Human Frame. An accompanying biographical sketch of W.J. Little is available at DOI  10.1007/s11999-012-2301-z. The Classic Article is ©1843 and is reprinted courtesy of Elsevier from Little WJ. Hospital for the Cure of Deformities: course of lectures on the deformities of the human frame. Lancet. 1843;41:350–354.     

人工全髋关节置换术治疗强直性脊柱炎髋关节病变的临床疗效

目的 观察人工全髋关节置换治疗强直性脊柱炎髋关节病变的手术方法和临床效果.方法 对2001年3月至2009年6月26例(31髋)强直性脊柱炎髋关节病变患者行人工全髋关节置换并随访,置换前患者日常活动均明显受限或者严重疼痛,Harris评分平均(43.2±5.8)分,髋关节活动度平均51.8°±9.7°.记录术后末次随访的Harris评分,X线检查结果,观察假体有无松动、脱位及异位骨化. 结果 所有病例得到随访,平均随访24.9(8 ～125)个月.末次随访患者均疼痛消失,步态正常.Harris评分平均(82.4±4.7)分;髋关节活动度平均148.6°±7.4°;髋关节Harris评分及关节活动度均显著高于置换前(P＜0.05).2髋出现异位骨化,为Brooker分级Ⅰ、Ⅲ级.无脱位、骨折及假体松动下沉,无患者进行翻修. 结论 人工全髋关节置换是治疗强直性脊柱炎晚期髋关节病变的有效方法,可以恢复关节功能,缓解关节疼痛并改善患者生活质量.     

髋臼重建治疗Crowe Ⅲ型髋臼发育不良

目的 探讨髋臼重建治疗Crowe Ⅲ型髋臼发育不良的手术方法及疗效.方法 2001年1月至2007年6月43例(54髋)Crowe Ⅲ型髋臼发育不良继发骨关节炎患者接受全髋关节置换术治疗.术前Harris评分平均39分.髋臼重建方法包括单纯加深或穿透髋臼(A组)27例(34髋)、髋臼内壁截骨(B组)12例(15髋)、髋臼自体股骨头植骨(C组)4例(5髋).分别记录每种重建方法的手术时间、出血量、并发症.术后随访进行放射学及临床疗效评估.结果 40例(50髋)患者获得完整随访,随访时间平均29个月.在术后3～5个月随访时截骨和植骨已愈合.摄x线片测量A、B、C组重建方式的髋臼外倾角分别为(41.0±7.5)°,(46.0 ±7.7)°,(39.0±11.0)°;前倾角分别为(10.0±2.8)°,(9.0±2.5)°,(4.0±1.9)°;旋转中心上移分别为(8.4±3.6)mm,(7.3 ±2.6)mm,(1.2±0.5)mm;旋转中心内移分别为(7.0±1.5)mm,(9.9 ±1.7)mm,(-2.7 ±1.2)mm.A、B、C组末次随访平均Harris评分分别为B9、91、86分.随访患者中2例发生下肢深静脉血栓,2例可疑肺栓塞,4例坐骨神经麻痹.结论 单纯加深或穿透髋臼、髋臼内壁截骨、自体股骨头植骨是Crowe Ⅲ 型髋臼发育不良髋臼重建的有效方法.应根据术前评估、术中具体情况采用相应的重建方法.     

Genetic requirements for the development of the GVH reaction following small-bowel transplantation

The genetic requirements for the development of graft-versus-host (GVH) disease have been investigated in a model of semiallogenic, heterotopic small-bowel transplantation in the rat. Following semiallogenic MHC-incompatible small-bowel transplantation, all graft recipients showed characteristic signs of GVH disease and died within 14 days. On autopsy the transplanted bowel was normal, while the recipient's bowel was dilated and distended with gas. Histology showed a generalized cell infiltration of the connective tissue with macrophages and lymphocytes. After semiallogenic, RT1.A-incompatible, small-bowel transplantation, the graft recipients developed mild and temporary symptoms of GVH disease between days 25 and 40. Only two of the six animals died, while the remaining animals survived the observation period. Small-bowel transplantation across an isolated RT1.C barrier was unable to induce GVH reaction. These results indicate that the development of GVH disease after small-bowel transplantation is controlled genetically by the MHC. Class II MHC incompatibility is necessary for the induction of an acute and lethal GVH reaction.     

髌骨软骨破坏程度对保留髌骨的全膝关节置换术疗效的影响

目的 探讨髌骨软骨破坏程度对保留髌骨的全膝关节置换术疗效的影响.方法 2002年1月至2006年5月行全膝关节置换术163例244膝,根据术中观察到的髌骨软骨破坏程度将患者分为轻度、中度、重度软骨破坏三组.所有手术均不置换髌骨.术后随访88例133膝,轻度组42膝,中度组43膝,重度组48膝.采用美国膝关节学会评分(Knee Society Score,KSS)系统(包括膝评分和膝功能评分)和膝前痛评分系统对三组疗效进行评估.结果 随访48～102个月,平均72个月.KSS膝评分和膝功能评分从术前(35.1±5.4)分和(19.2±9.8)分分别提高到(91.7±5.6)分和(83.7±17.5)分.三组KSS膝评分从术前(34.7±6.2)分、(36.5±5.2)分、(35.3±6.2)分分别提高至(92.6±4.5)分、(90.5±6.7)分、(91.9±5.9)分;膝功能评分从术前(14.2±8.6)分、(16.5±7.4)分、(17.0±7.5)分分别提高至(86.6±12.6)分、(82.0±17.2)分、(82.8±21.1)分.三组术后膝评分和膝功能评分的差异均无统计学意义.术后膝前痛的发生率为11.3%(15/133),轻度、中度、重度软骨破坏组分别为11.9%(5/42)、11.6%(5/43)、10.4%(5/48),差异无统计学意义.结论 全膝关节置换术后疗效及膝前痛的发生率与术前髌骨软骨破坏程度无关,髌骨软骨破坏程度不是全膝关节置换术中置换髌骨的可靠依据.

Abstract：

Objective To determine whether there was any correlation between the degree of degenerative changes in the patellar cartilage and the clinical outcome after TKA without patellar resurfacing.Methods A clinical study was performed on 133 knees of 88 patients that underwent TKA without patellar resurfacing from January 2002 to May 2006. According to the degenerative condition of the patellar cartilage,patients was classified as mild group, moderate group, and severe group. Pre- and post-operative evaluations were performed using the knee and function scores of the Knee Society Clinical Rating System (KSS) and Anterior Knee Pain Rating. Results The duration of follow-up was 72 months (range 48-102). The overall knee score of KSS in all patients were improved from 35.1±5.4 preoperatively to 91.7±5.6 postoperatively,and function score of KSS from 19.2±9.8 preoperatively to 83.7±17.5 postoperatively. The mean knee scores of KSS were improved from 34.7±6.2, 36.5±5.2 and 35.3±6.2 preoperatively to 92.6±4.5, 90.5±6.7 and 91.9±5.9 in mild, moderate, and severe group postoperatively, respectively. The mean function scores of KSS were improved from 14.2±8.6, 16.5±7.4 and 17.0±7.5 postoperatively to 86.6±12.6, 82.0±17.2 and 82.8±21.1 in mild, moderate, and severe group postoperatively, respectively. There was no difference among all groups with regard to the postoperative knee scores and function scores of KSS. The prevalence of anterior knee pain was 11.3% in all, and 11.9% in mild group, 11.6% in moderate group and 10.4% in severe group. There was no difference among all groups with regard to the anterior knee pain. Conclusion The clinical outcome and anterior knee pain after TKA without patellar resurfacing was not correlated with the severity of degenerative changes in the patellar cartilage. The degree of degenerative condition of the patellar cartilage is not indication for patellar resurfacing.     

膝骨关节炎周围血供变化的影像学观察

目的:对比观察膝骨关节炎患者和正常人群膝关节周围血供变化。方法:2014年6月至2015年6月,纳入诊治的膝骨关节炎患者30例,健康成年人30例。膝骨关节炎组男9例,女21例,年龄53~82岁,平均(65.967±7.132)岁,平均动脉压(93.462±7.633)mm Hg;对照组男9例,女21例,年龄50~75岁,平均(62.867±6.356)岁,平均动脉压(92.122±9.675)mm Hg。检查方法包括彩超和下肢CTA;观察指标包括侧支循环,动脉迂曲,动脉畸形,管腔狭窄和动脉壁斑块形成情况。根据动脉的狭窄程度不同分为5级:1级为无狭窄,2级为轻度狭窄(1%~49%),3级为中度狭窄(50%~70%),4级为重度狭窄(70%~99%),5级为完全闭塞。测量两组的腘动脉、胫前动脉、胫后动脉内径的大小以及血流动力情况,并将膝骨关节炎组与对照组进行比较。结果:无剔除或脱落病例。膝骨关节炎组3例形成侧支循环,对照组4例;膝骨关节炎组0例动脉迂曲,对照组2例;两组均无动脉畸形。膝骨关节炎组动脉无狭窄0例,轻度14例,中度7例,重度9例,闭塞0例;对照组动脉无狭窄9例,轻度10例,中度6例,重度4例,闭塞1例;两组比较差异有统计学意义,膝骨关节炎组动脉狭窄比对照组严重。膝骨关节炎组30例动脉形成斑块,对照组20例形成斑块,两组比较差异有统计学意义,膝骨关节炎组动脉斑块形成比例高于对照组。膝骨关节炎组斑块钙化率100%,对照组63%。胫前动脉直径差异有统计学意义,膝骨关节炎组胫前动脉直径较大。两组腘动脉流速差异有统计学意义,膝骨关节炎组流速更快。胫后动脉流速差异有统计学意义,膝骨关节炎组流速更快。动脉流量方面,3条动脉数据比较差异均无统计学意义。结论:膝骨关节炎局部血管主要病理改变为狭窄和斑块形成,而局部动脉血流总量大致不变。临床治疗中改善局部血管病变的方法可能优于加速血流速度的方法,进一步针对局部血管异常改变的介入治疗也将为骨关节炎的临床治疗提供一个新的思路与方法。