推荐回答(1个)
梅毒不及时发现并彻底治疗,还会患者造成致命的伤害。梅毒还会出现很多疾病相类似的症状,很容易让患者混淆。因此,知道梅毒的检查方法就更重要了。
(一) 梅毒血清学其范围以较低的特异性、敏感性到高度的特异性、敏感性主要包括以下几种方法。
1.华氏试验、康氏试验 以往常被用于梅毒的血清学试验。现在已被更敏感、更特异的方法所替代。
2.非螺旋体血清试验(非特异性心月抗体) 有VDRL试验(性病研究实验室)、RPR(快速血浆反应素环状卡片试验和APT(自动反应素)试验,经常用于梅毒筛选。VDRL试验在初期梅毒阳性率为70%,Ⅱ期梅毒阳性率为99%,而在晚期梅毒(包括心血管和神经梅毒)阳性率为70%。如果合并HIV感染初期和Ⅱ期梅毒试验的反应可以被延迟或阳性率降低。
3.梅毒螺旋体试验 包括密螺旋体活动抑制试验。荧光法密螺旋体抗体吸附试验和密螺旋体微量血细胞凝集试验均阳性。作为心血管和神经梅毒的阳性试验。MHA-TP试验在初期梅毒其敏感性比VDRL试验和FTA-ABS试验要差些,但在Ⅱ期和晚期梅毒在敏感性和特异性方面与FTA-ABS相似。即使病人经过治疗,FTA-ABS可终身保持阳性。
4.密螺旋体IgG抗体测定 具有FTA-ABS试验特点,有99%敏感性和88%特异性,容易操作,特别用于怀疑重复感染的病例,先天性梅毒和梅毒与HIV混合感染者。
(二)梅毒的影像学检查
1.胸部X线检查梅毒 单纯性梅毒性主动脉炎时可见升主动脉近端扩张,约有20患者升主动脉见线索状钙化,而主动脉粥样硬化时常在胸降主动脉有块状硬化。升主动脉钙化常在梅毒性主动脉炎发生数年后出现。梅毒性主动脉炎时,主动脉结和胸降主动脉可以钙化,但以近头、臂动脉处的升主动脉钙化最广泛,而动脉粥样硬化时主动脉结与胸降主动脉钙化最突出,有所区别。梅毒性主动脉炎时病变从主动脉根部开始,可以向远端延伸,最多可达横膈、病变处主动脉增宽。在有主动脉瓣关闭不全存在时,心脏向左下后方增大呈鞋形,在荧光屏下心脏与主动脉搏动剧烈、幅度大。在主动脉瘤时发现在相应部位主动脉膨出,呈膨胀性搏动,升主动脉或主动脉弓瘤可以侵蚀邻近骨骼可见到骨质的破坏,瘤壁内可有钙化。
2.CT和MRI检查梅毒 CT(计算机化X线断层显像)用于胸部X线有怀疑病例的筛选,能精确测量动脉瘤的大小,其精确度不亚於超声造影和动脉造影,是一种特别引人注意的新技术。MRI(磁共振显像)能获得高分辨率静态影像,对胸主动脉病变有高度诊断精确性。能显示囊性动脉瘤,动脉瘤真实大小和特征,与周围炎症反应的关系。动脉瘤受累的范围与主动脉弓的相互关系。对心脏瓣膜返流的探测有高度的敏感性和特异性。
3.超声检查梅毒 超声心动图可显示不同节段增宽、钙化、动脉瘤(包括主动脉窦瘤)以及主动脉瓣关闭不全。用超声多普勒测出主动脉瓣返流量。检测左心室大小,室壁厚度,左室收缩末期和舒张末期压力和容量,射血分数等。显示二尖瓣活动异常包括前叶舒张期扑动。显示动脉瘤大小、部位和破裂部位等。
4.心血管造影检查梅毒 逆行主动脉造影显示主动脉瘤部位和大小,主动脉瓣返流程度,左室大小,心功能状况等。选择性冠状动脉造影用于梅毒性心血管病患者有心绞痛而怀疑有冠状动脉口狭窄时,该病冠状动脉狭窄仅限于开口处,而远处冠状动脉无狭窄病变,这点与冠状动脉粥样硬化时不同。据统计有20%-80%梅毒性主动脉炎病人有冠状动脉口狭窄。
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