经静脉声学造影剂增强乳腺肿块彩色血流信号的初步研究

本文探讨经静脉声学造影剂对乳腺肿块彩色血流信号的增强作用及鉴别良恶性病变的应用价值。１０例患者中７例为乳腺癌，３例为良性肿块，经静脉注射声学造影剂后，病灶区彩色血流信号显著增强：６例乳腺癌和１例良性肿块病灶内见有片状彩色血流区，血管数增多２～６条；１例直径＜１．０ｃｍ的乳腺癌见有１条彩色血流束；２例良性肿块中１例无彩色信号而另１例仅有１条血管。结果提示：经静脉声学造影剂能显著增强乳腺肿块彩色多普勒血流信号，更准确地反映肿块血供状况；有助于准确鉴别乳腺良、恶性病变。     

高氧口含雾化结合药液含漱对提高化疗性口腔炎疗效的观察

目的探讨高氧口含雾化结合药液含漱对化疗性口腔炎的临床治疗价值。方法将73例化疗性口腔炎患者随机分为A组(36例)和B组(37例)。A组采用单纯药液含漱;B组采用药液含漱+高流量氧口含雾化。观察记录2组患者恢复普通进食时间、体温恢复时间、口腔溃疡痊愈的时间。结果恢复普通进食时间、体温恢复正常时间、口腔溃疡痊愈的时间B组均较A组显著提前(P<0.05)。结论药液高氧口含雾化能提高化疗性口腔炎的疗效,减少患者的痛苦。     

高频水针疗法对颈椎病神经根性痛患者外周血TNF-α含量 及中性粒细胞百分率影响的初步研究

目的:研究TNF-α、中性粒细胞(PMNs)与神经根型颈椎病(CRS)根性痛的相关性及高频水针疗法对该病患者血清TNF-α含量、PMNs百分率的影响。方法:收集20例符合条件的CRS患者,按门诊就诊顺序随机分为观察组和对照组,各10例,观察组用高频水针疗法,对照组用水针疗法。同时与20例正常人作对照。于治疗前和1个疗程后清晨空腹抽取静脉血,ELISA法检测血清TNF-α含量及行血常规检查。结果:TNF-α含量升高且与根性痛程度成正相关(r=0.830,P<0.01),PMNs百分率虽然升高,但与根性痛程度无相关性(r=0.210,P>0.05)。高频水针组和水针组均能改善患者的TNF-α含量、PMNs百分率,但前者对TNF-α含量、PMNs百分率的改善情况好于后者(P<0.01)。结论:TNF-α与神经根型颈椎病根性痛程度成正相关。高频水针疗法能降低或抑制炎性细胞因子的释放,具有明显的抗炎、镇痛作用,对神经根性痛有明显的干预作用。     

高频探头对白内障声像图分型的探讨

本文应用１０ＭＨｚ高频探头检测２８例４８眼白内障患者，经临床特殊检查和手术病理证实。Ｂ超检出４４眼，总符合率为９１．７％（４４／４８）。４４眼晶体声像图表现可分为三型：皮质型、核型和完全型（混合型）。Ｂ超对核型和完全型（混合型）诊断符合率为１００％，皮质型有４例假阴性（１１％）。本文对各型声像图表现及假阴性作了研究与探讨。     

基于碳纳米管的靶向超声造影剂在肿瘤中的应用进展

纳米级靶向超声造影剂具有无辐射、实时显像及高度靶向性等优点。其中碳纳米管(CNT)具有独特的光学、电学和声学特性及较高的比表面积和良好生物相容性,通过对其进行修饰或改性,可制备出性能优良的复合纳米材料,用于诊断及治疗肿瘤。本研究对基于CNT的靶向超声造影剂在肿瘤中的应用进展进行综述。     

Evaluation of contrast‐enhanced digital mammography (CEDM) in the preoperative staging of breast cancer: Large‐scale single‐center experience

One of the most important indications for contrast‐enhanced breast imaging is the presurgical breast cancer (BC) staging. This is a large‐scale single‐center experience which evaluates the role of CEDM in presurgical staging and its impact on surgical planning. The aims of this retrospective study were to define the diagnostic performance of CEDM in the presurgical setting and to identify which types of patients could benefit from having CEDM. We selected 326 patients with BC who underwent CEDM as preoperative staging and had breast cancer‐related surgery at our institution. We analyzed those cases in which CEDM led to additional imaging or biopsy and those in which it changed the type of surgery that was planned according to conventional breast imaging (CI) techniques (digital mammography, tomosynthesis and bilateral handheld ultrasound). CEDM sensitivity in identifying the index lesion and sensitivity, specificity, positive (PPV) and negative (NPV) predictive values, and accuracy in the correct preoperative staging of BC of the whole population and in various subgroups were calculated. CEDM sensitivity for the index lesion was 98.8% (322/326), which led to additional breast imaging in 23.6% (77/326) of patients and additional biopsies in 17.5% (57/326). CEDM changed the type of surgery in 18.4% (60/326). In the preoperative breast cancer staging, CEDM sensitivity, specificity, PPV, NPV, and accuracy produced results of 93%, 98%, 90%, 98%, and 97%, respectively. CEDM performance was better in patients with palpable lesions. CEDM has an excellent diagnostic performance in the presurgical staging of BC. Symptomatic patients with palpable lesions benefitted most from preoperative CEDM, with a statistically significant difference compared with nonpalpable.     

Differentiation between benign and malignant ovarian masses using multiparametric MRI

PurposeTo investigate the capabilities of multiparametric MRI including dynamic contrast enhanced (DCE) perfusion and diffusion-weighted imaging (DWI) to discriminate between benign and malignant ovarian masses.MethodsA total of 43 women with a total of 43 ovarian masses were retrospectively included. They had a mean age of 51.26 ± 18.05 (SD) years (range: 20–88 years). Twenty women had benign and 23 had malignant ovarian tumors. All women had multiparametric MRI examinations including DWI (b50-b800) and DCE perfusion imaging at 1–5 T. Results of DWI (apparent diffusion coefficient [ADC], b-800) and DCE imaging (volume transfer coefficient [K^trans], rate constant [K_ep], interstitial volume [V_e], initial area under the curve [iAUC]) were compared between benign and malignant ovarian masses.ResultsMean ADC was significantly lowed in malignant tumors (0.92 ± 0.25 [SD] ×10⁻³ mm²/s (range: 0.6–1.6 × 10⁻³ mm²/s) than in benign tumors (1.37 ± 0.69 [SD] × 10⁻³ mm²/s; range: 0.4–2.9 × 10⁻³ mm²/s) (P = 0.011). B-800 was significantly greater in malignant tumors (80.61 ± 24.73 [SD] s/mm²; range: 24–110 s/mm²) than in benign ones (61.15 ± 22.17 [SD] s/mm²; range: 38–155 s/mm²) (P = 0.010).  K^trans was lower in benign tumors (0.13 ± 0.06 [SD] min⁻¹; range: 0–0.2 min⁻¹) than in malignant ones (0.25 ± 0.16 [SD] min⁻¹; range: 0.1–0.8 min⁻¹) (P = 0.002).  K_ep was significantly greater in malignant tumors (0.55 ± 0.19 [SD] min⁻¹; range: 0.1–1.9 min⁻¹) than in benign ones (0.44 ± 0.38 [SD] min⁻¹; range: 0.2–1.1 min⁻¹) (P = 0.003). iAUC was greater in malignant tumors (15.59 ± 7.98 [SD] mM/min; range: 6.6–42.1 mM/min) than in benign ones (7.98 ± 5.06 [SD] mM/min; range: 0.2–17.7 mM/min) (P = 0.001). No differences in V_e were found between benign and malignant masses (P = 0.084). The area under the ROC curve was significant for all parameters but V_e. Logistic regression analysis revealed 5.590 and 11.637 times higher malignancy risk for an ADC ≤ 0.93 × 10⁻³ mm²/s and an iAUC ≥ 13.88 mM/min, respectively.ConclusionMultiparametric MRI has high accuracy in discrimination between benign and malignant ovarian masses. Therefore, adding these methods to the more common MRI protocol can help select the best treatment option in women with ovarian mass.     

关节镜联合胫骨高位截骨治疗伴膝内翻的中老年患者内侧半月板退变性损伤

目的探讨关节镜联合胫骨高位截骨治疗伴膝内翻的内侧半月板退变性损伤的早期疗效。 方法回顾性分析2014年1月至2015年1月,西南医科大学附属医院骨关节外科收治的伴膝内翻的内侧半月板退变性损伤患者26例,采取关节镜联合胫骨高位截骨的手术方式进行治疗。其中男性18例（18膝）,女性8例（8膝）：年龄43~58岁,平均（49±6）岁。所有患者均为内侧半月板退变性损伤且伴有膝内翻,均行内侧撑开胫骨高位截骨,关节镜下半月板部分切除术缓解疼痛。测量下肢机械轴通过胫骨平台的相对位置、股胫角、胫骨平台后倾角;末次随访时评估膝关节各间室骨关节炎进展情况,采用Lysholm评分、美国特种外科医院（HSS）评分和Tegner膝关节运动评分评价膝关节功能,采用视觉模拟疼痛评分（VAS）评价疗效。 结果本组26例患者均获随访,随访时间为1.0~2.8年,平均为（1.6±0.5）年。未发现感染、下肢深静脉血栓形成、骨不愈合或延迟愈合等并发症。下肢机械轴通过胫骨平台的相对位置由术前（21.2±3.8）%改善至（59.5±1.7）%,股胫角由术前的（172±4）°改善至（179±4）°,差异均有统计学意义（t=14.257,P<0.05;t=10.572,P<0.05）。术前胫骨平台后倾角为（7.5±2.2）°,术后为（7.9±1.9）°,差异无统计学意义（t=1.628,P>0.05）。末次随访时,患者Lysholm评分、HSS评分、Tegner评分、VAS评分均较术前明显改善,差异有统计学意义（t=7.684,P<0.05;t=16.521,P<0.05;t=6.284,P<0.05;t=12.359,P<0.05）。 结论关节镜联合胫骨高位截骨治疗伴膝内翻的内侧半月板退变性损伤,能够有效改善下肢力线和缓解关节疼痛,早期临床疗效满意。     

Dual contrast in computed tomography allows earlier characterization of articular cartilage over single contrast

Cationic computed tomography contrast agents are more sensitive for detecting cartilage degeneration than anionic or non-ionic agents. However, osteoarthritis-related loss of proteoglycans and increase in water content contrarily affect the diffusion of cationic contrast agents, limiting their sensitivity. The quantitative dual-energy computed tomography technique allows the simultaneous determination of the partitions of iodine-based cationic (CA4+) and gadolinium-based non-ionic (gadoteridol) agents in cartilage at diffusion equilibrium. Normalizing the cationic agent partition at diffusion equilibrium with that of the non-ionic agent improves diagnostic sensitivity. We hypothesize that this sensitivity improvement is also prominent during early diffusion time points and that the technique is applicable during contrast agent diffusion. To investigate the validity of this hypothesis, osteochondral plugs (d = 8 mm, N = 33), extracted from human cadaver (n = 4) knee joints, were immersed in a contrast agent bath (a mixture of CA4+ and gadoteridol) and imaged using the technique at multiple time points until diffusion equilibrium. Biomechanical testing and histological analysis were conducted for reference. Quantitative dual-energy computed tomography technique enabled earlier determination of cartilage proteoglycan content over single contrast. The correlation coefficient between human articular cartilage proteoglycan content and CA4+ partition increased with the contrast agent diffusion time. Gadoteridol normalized CA4+ partition correlated significantly (P < .05) with Mankin score at all time points and with proteoglycan content after 4 hours. The technique is applicable during diffusion, and normalization with gadoteridol partition improves the sensitivity of the CA4+ contrast agent.