Pyramidal and posterior osseous release for maxillary superior/posterior mobilization using an ultrasonic bone-cutting device after Le Fort I osteotomy

AimThe purpose of this study was to evaluate the efficiency of pyramidal and posterior osseous release (PPOR) for maxillary impaction using an ultrasonic bone-cutting device after Le Fort I (LFI) osteotomy.Materials and methodsIn total, 31 Japanese adults with jaw deformities, diagnosed as having maxillary excess with mandibular prognathism or deficiency, underwent LFI osteotomy and bilateral sagittal split osteotomy. The patients were divided into two groups: a trimming group (15 patients, four men and 11 women; mean age 24.8 years) and a PPOR group (16 patients, seven men and nine women; mean age 22.8 years). In the trimming group, osseous interference around the descending palatine artery (DPA) was removed using forceps, rounding bur, and reciprocating rasp. The PPOR technique was used to remove osseous fragments created by V-shaped osteotomy around the DPA following vertical osteotomy behind the DPA using an ultrasonic bone-cutting device (Variosurg 3; NSK, Tochigi, Japan). The operative times for maxillary osteotomy, total operative times (including bilateral sagittal split osteotomy), and total blood loss were assessed.ResultsThe mean planned amounts of maxillary impaction were 4.37 ± 1.27 mm in the trimming group and 4.38 ± 1.36 mm in the PPOR group (p = 0.98). The mean maxillary operative time for the PPOR group was significantly shorter, by 25.5% (p < 0.001). Total operative time for the PPOR group was also significantly shorter, by 24.3% (p < 0.001). Mean blood loss was significantly lower in the PPOR group than in the trimming group (p = 0.003).ConclusionThe PPOR technique for maxillary impaction after LFI osteotomy shortened the operative time and enabled secure reduction of the maxilla in patients who required the treatment of maxillary impaction with preservation of the DPA bundle.     

Using arterial spin labeling blood flow and its histogram analysis to distinguish early-stage nasopharyngeal carcinoma from lymphoid hyperplasia

To investigate the feasibility of arterial spin labeling (ASL) blood flow (BF) and its histogram analysis to distinguish early-stage nasopharyngeal carcinoma (NPC) from nasopharyngeal lymphoid hyperplasia (NPLH).Sixty-three stage T1 NPC patients and benign NPLH patients underwent ASL on a 3.0-T magnetic resonance imaging system. BF histogram parameters were derived automatically, including the mean, median, maximum, minimum, kurtosis, skewness, and variance. Absolute values were obtained for skewness and kurtosis (absolute value of skewness [AVS] and absolute value of kurtosis [AVK], respectively). The Mann–Whitney U test, receiver operating characteristic curve, and multiple logistic regression models were used for statistical analysis.The mean, maximum, and variance of ASL BF values were significantly higher in early-stage NPC than in NPLH (all P < 0.0001), while the median and AVK values of early-stage NPC were also significantly higher than those of NPLH (all P < 0.001). No significant difference was found between the minimum and AVS values in early-stage NPC compared with NPLH (P = 0.125 and P = 0.084, respectively). The area under the curve (AUC) of the maximum was significantly higher than those of the mean and median (P < 0.05). The AUC of variance was significantly higher than those of the other parameters (all P < 0.05). Multivariate analysis showed that variance was the only independent predictor of outcome (P < 0.05).ASL BF and its histogram analysis could distinguish early-stage NPC from NPLH, and the variance value was a unique independent predictor.     

Cardiac Denervation for Arrhythmia Treatment with Transesophageal Ultrasonic Strategy in Canine Models

Stellate ganglion (SG) modification has been investigated for arrhythmia treatment. In this study, transesophageal SG imaging and intervention were explored using a homemade 30F integrated focused ultrasonic catheter in healthy mongrel canines in vivo. Anatomic details of SGs were ultrasonically imaged and evaluated. SG had a heterogeneous echoic structure and characteristic profiles sketched by hyper-echoic outlines in an ultrasonogram. Left SGs in the experimental group were successfully ablated through the esophagus under ultrasonic guidance provided by the catheter itself. Two weeks after the ablation, the QT and QTc of the experimental group decreased compared with those of the sham group and at baseline (both p values < 0.001). Histologic examination revealed that left SGs were destroyed. No major complications were observed. This approach may be further explored as a method for ganglia remodeling evaluation and as a strategy of ganglia modification for arrhythmia and for other diseases.     

二维斑点追踪技术评价低温兔左室纵向功能

目的:探讨应用二维斑点追踪技术评价低温条件下兔左心室纵向功能的价值。方法:30只新西兰兔随机分成对照组(n=10),低温组A(n=10),低温组B(n=10)。先行常规心脏数据测量,然后采用组织多普勒(TDI),之后应用斑点追踪成像(STI)中的获取基底段、中间段、心尖段及整体水平SL、SrLs.SrL E,SrL A及分层应变技术获取3个长轴切面心内膜下、中层和心外膜下心肌收缩期纵向峰值应变(SL)。结果:①与对照组相比,A组心内膜下心肌LS值的减低,差异有统计学意义(P<0.05),B组3层心肌SL值的减低明显,差异有统计学意义(P<0.01)②与对照组相比,A组大部分纵向应变及应变率减低(P<0.05);B组基底段、中间段、心尖段及整体水平SL,SrL S、SrLE、SrLA均减低(P<0.01)结论:随低温时间延长,左室壁3层心肌SL值受累程度不同,心内膜应变较心外膜更加敏感,二维班点追踪技术比LVEF及TDI更早发现左室功能减低。     

痛经的临床因素分析

目的:痛经的发病率逐年增高,重新分析痛经患者的临床因素,提出新的认识。方法:将1 158例痛经患者的临床资料及超声检查结果进行统计学分析。结果:人工流产史与痛经的发生有密切相关性(P<0.001)。结论:人工流产手术是引起痛经的主要原因。该手术所产生的副作用可对女性生理健康造成严重伤害,必须引起全社会的高度关注。     

Ultrasound evaluation of female urinary incontinence

Thirty women, 25 with incontinence and five asymptomatic volunteer control subjects, were evaluated urodynamically by a variety of techniques, including ultrasound cystourethrography. The ultrasound evaluation was found to be a helpful adjunct in diagnosis. In comparison with radiologic techniques it offers more safety, more comfort, more privacy, more viewing time, and less cost. Bladder and urethral morphology during voiding activity and the amount and direction of urethrovesical mobility are easily determined by utilizing ultrasound techniques.     

急性膀胱炎超声表现特点

目的探讨急性膀胱炎(AC)的超声声像图特点。方法将32例AC自然充盈膀胱后的左右径、上下径、前后径,膀胱壁厚度、膀胱壁光滑度及膀胱内透声状态与63例正常组所测膀胱对应各值比较。结果炎症组与正常对照组膀胱左右径、上下径及前后径比较均无显著性差异,膀胱壁厚度炎症组(0.446±0.036)cm,对照组(0.224±0.036)cm,两者间有非常显著性差异P<0.01。尿频症状明显同时伴有血尿者,膀胱壁增厚的几率增加。结论膀胱壁增厚(以黏膜层为著),尿液透声差或透声欠佳是AC的主要超声征像。     

经直肠超声对前列腺癌诊断的价值

目的：本文观察前列腺癌部位声像图特点并与病理对照，以便帮助对前列腺癌诊断及穿刺点的正确选择，提高前列腺穿刺活检阳性率。方法：总结64例经病理证实为前列腺癌的112个部位的经直肠超声声像图，观察有无异常回声肿块和异常血流区域。结果：112个前列腺癌部位其经直肠超声(TRUS)检查发现异常的有90个，占80．4％；TRUS检查未发现可疑之处的为22个，占19．6％。结论：TRUS可作为诊断前列腺癌和前列腺穿刺活检穿刺点选择的重要方法。     

2种清洗设备洗涤医用器械的质量分析

目的通过观察全自动清洗消毒器与超声波清洗机洗涤不同类医用器械的质量,找出不同器械的最佳洗涤方法,为制订各种器械洗涤流程提供依据。方法将回收器械随机分为A洗涤法和B洗涤法。A洗涤法:将回收器械直接放入全自动清洗消毒器内按程序进行清洗、消毒和干燥。B洗涤法:将器械放入超声波机内按程序加酶浸泡、超声波清洗、冷水热水喷淋清洗消毒、上油烘干。比较2种洗涤方法的洗涤效果。结果A洗涤法洗涤后齿类器械剩余残留物为0.52‰,非齿类器械剩余残留物为0.07‰,2种器械洗涤效果差异有统计学意义(!2=28.189,P=0.000),洗涤齿类器械效果差;B洗涤法洗涤齿类器械剩余残留物为0.04‰,非齿类器械剩余残留物为0.01‰,2种器械洗涤效果差异无统计学意义(!2=1.008,P=0.313)。而2组洗涤法洗涤齿类器械效果有统计学意义(!2=44.097,P=0.000);非齿类器械洗涤后剩余残留物对比不明显,洗涤效果差异无统计学意义(!2=2.667,P=0.102)。结论采用超声波清洗机清洗齿类器械洗涤效果佳;而采用全自动清洗消毒器洗涤齿类器械洗涤效果差,但洗涤非齿类器械洗涤容量大,效果好。     

超声抽吸法治疗下肢原发性淋巴水肿

目的观察超声抽吸法治疗下肢原发性淋巴水肿的疗效。方法为12例患者采用内超声脂肪抽吸机吸除淋巴水肿组织以降低患肢淋巴负荷，抽吸后结合持续弹力袜裤压扎。结果术后2周水肿即时消退明显，术后1年随访水肿消退，复发不明显。结论超声抽吸法治疗原发性淋巴水肿安全简便，结合弹性袜裤压扎可望取得较好的远期疗效。