产后出血的临床病因
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admin
31 May,2017
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产后出血的发病原因依次为子宫收缩乏力、软产道裂伤、胎盘因素及凝血功能障碍。四大原因可以合并存在,也可以互为因果。
1.宫缩乏力
是产后出血最常见的原因,占70%。子宫肌纤维的解剖分布是内环、外纵、中交织。正常情况下,胎儿娩出后,不同方向走行的子宫肌纤维收缩对肌束间的血管起到有效的压迫作用。如果出现子宫肌纤维收缩无力即宫缩乏力则失去对血管的有效压迫作用而发生产后出血。常见的因素有:①全身因素:产妇因对分娩过度恐惧而极度紧张,尤其对阴道分娩缺乏足够信心则可以引起宫缩不协调或宫缩乏力。此种情况在临产后可能需要使用镇静剂及麻醉剂等将引增加产后宫缩乏力而引起产后出血;②产科因素:产程过长造成产妇极度疲劳及全身衰竭,或产程过快,均可引起子宫收缩乏力;羊水过多、巨大儿及多胎妊娠使子宫肌纤维过度伸展,产后肌纤维缩复能力差,多次分娩而致子宫肌纤维受损,均可引起子宫收缩乏力。子痫前期(重度)、严重贫血、宫腔感染等产科并发症及合并症使子宫肌纤维水肿而引起子宫收缩乏力;③子宫因素:子宫肌纤维发育不良,如子宫畸形或子宫肌瘤等。
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Categories :
妇科炎症
垂体泌乳素的病因与诊断
Posted by
admin
27 May,2017
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垂体泌乳素腺瘤通常是稀疏颗粒的单激素分泌性腺瘤。泌乳素腺瘤是由分泌催乳素或生长激素的一种瘤细胞组成或由分泌混合型多激素两种或多种以上瘤细胞组成,免疫组化和原位杂交分析显示产生催乳素的细胞同时也能产生生长激素。 1、神经刺激:某些部位特别是胸部的皮肤受刺激,包括周围神经损伤引起的剧痛,都可通过神经传递到下丘脑而引起泌乳素增高。如胸部手术、灼伤、胸背部的带状疱疹等。2、垂体障碍:
Categories :
妇科生殖
卵巢癌的临床症状与体征
Posted by
admin
7 May,2017
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卵巢恶性肿瘤是女性生殖器官常见的恶性肿瘤之一,发病率仅次于子宫颈癌和子宫体癌而列居第三位。但卵巢上皮癌死亡率却占各类妇科肿瘤的首位,对妇女生命造成严重威胁。由于卵巢的胚胎发育、组织解剖及内分泌功能较复杂,早期症状不典型,术前鉴别卵巢肿瘤的组织类型及良恶性相当困难。卵巢恶性肿瘤中以上皮癌最多见,其次是恶性生殖细胞肿瘤。卵巢上皮癌患者手术中发现肿瘤局限于卵巢的仅占30%,大多数已扩散到子宫
Categories :
妇科生殖
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