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【PPT】咳嗽与咳痰(症状学)-2版

  • 2026-05-14 01:13:02
【PPT】咳嗽与咳痰(症状学)-2版

【考点笔记】咳嗽与咳痰(症状学)-3版

注:如需考点笔记版PDF(方便打印/做笔记),可私信领取。

【考点大纲】

一、症状基础与发病机制

(一)咳嗽与咳痰的定义与临床意义(★★☆☆☆)

1、基本定义

  1. 咳嗽:延髓咳嗽中枢调控的爆发性呼气动作
  2. 咳痰:下呼吸道病理性分泌物经咳嗽排出口腔的过程
  3. 正常气道黏液分泌量:10-100ml/日(★☆☆☆☆)

2、临床重要性

  1. 咳嗽是最常见的就诊症状
  2. 慢性咳嗽定义:病程 >8周(★★★★★)
  3. 亚急性咳嗽:3-8周(★★★★☆)
  4. 急性咳嗽:<3周(★★★★☆)

二、咳嗽的发病机制(★★★★☆)

(一)咳嗽反射的神经通路(★★★★☆)

环节
关键结构
考点
感受器
喉、气管隆突最敏感
Arnold反射(外耳道刺激致咳)
传入神经
迷走神经
为主
★★★★★
咳嗽中枢
延髓
★★★★☆
传出神经
膈神经、喉下神经、脊神经
★★★★☆
效应器
声门、膈肌、腹肌、肋间肌

(二)咳嗽动作四相机制(★★★☆☆)

  1. 吸气相:深吸气储备势能
  2. 加压相:声门紧闭,胸内压↑↑(可达300mmHg)——核心环节
  3. 呼气相:声门突开,高速气流喷射
  4. 恢复相:肌肉松弛

(三)咳痰形成的病理生理(★★★☆☆)

  • 黏液分泌亢进→痰量增多
  • 脓痰本质:中性粒细胞坏死释放DNA
  • 纤毛清除障碍→痰液滞留

二、临床表现(核心考点章节)

(一)咳嗽的性质(★★★★★)

类型
定义
代表疾病
干性咳嗽
无痰或痰极少
喉癌、胸膜炎、早期肺结核、支气管异物、支气管肿瘤
湿性咳嗽
痰量>10ml/日
支气管扩张、肺脓肿、肺炎、慢性支气管炎

⚠️ 易错:早期肺结核=干咳;慢性纤维空洞型肺结核=湿咳+咯血


(二)咳嗽的时间与规律(★★★★☆)

规律
代表疾病
机制要点
夜间咳嗽左心衰竭、咳嗽变异性哮喘
迷走神经张力↑;回心血量↑
清晨/体位变动加剧支气管扩张、慢性支气管炎
痰液流动刺激
发作性咳嗽
百日咳、咳嗽变异性哮喘
气道高反应性
长期慢性咳嗽
COPD、支扩、肺结核
病程>8周

(三)咳嗽的音色(★★★★★)

音色
代表疾病
机制
声音嘶哑
声带炎症、喉返神经受压
声带病变或神经受损
鸡鸣样咳嗽百日咳
剧咳后急促吸气,气流过狭窄声门
金属音咳嗽纵隔肿瘤、支气管肺癌
气管受压狭窄
无力/低微
肺气肿、声带麻痹、极度衰弱
呼吸肌无力/声门闭合不全

⚠️ 易错:金属音=气管受压(纵隔);声音嘶哑=喉返神经受压


(四)痰的性状与疾病对应(★★★★★)

【必背核心对照表】

痰的性状
对应疾病
星级
铁锈色痰肺炎链球菌肺炎
★★★★★
粉红色泡沫样痰急性肺水肿(左心衰竭)
★★★★★
砖红色胶冻样痰肺炎克雷伯菌肺炎
★★★★☆
黄绿色/草绿色痰铜绿假单胞菌感染
★★★★☆
金黄色痰金黄色葡萄球菌感染
★★★☆☆
白色黏稠牵拉成丝痰真菌感染(白色念珠菌)
★★★★☆
大量脓痰+分层支气管扩张、肺脓肿
★★★★★
大量浆液泡沫样痰肺泡细胞癌
★★★☆☆
烂桃样痰
肺吸虫病
★★☆☆☆
棕褐色痰
阿米巴肺脓肿
★☆☆☆☆
血性痰
支扩、肺结核、肺癌、肺栓塞
★★★★★

【记忆口诀】

铁锈链球粉泡衰,砖红胶冻克雷伯。黄绿铜绿金葡黄,白色念珠拉丝长。分层脓痰支扩肺脓肿,血痰最重先查癌。


(五)伴随症状(★★★★☆)

伴随症状
代表疾病
考点
发热
感染、结核
午后低热+盗汗=肺结核
胸痛
胸膜炎、肺炎、肺栓塞
累及壁层胸膜
咯血
支扩、结核、肺癌、二尖瓣狭窄
痰中带血丝→警惕肺癌
呼吸困难
哮喘、COPD、气胸、肺水肿
局限性哮鸣音支气管肺癌
★★★★★
杵状指
支扩、肺脓肿、肺癌
COPD一般不出现

三、病因分类

(一)按系统分类(★★★★☆)

病因大类
代表疾病
星级
呼吸道疾病
最常见
★★★★★
心血管疾病
左心衰竭、肺栓塞
★★★★★
药物ACEI类
(普利类)
★★★★★
消化系统胃食管反流病
★★★★★
胸膜疾病
胸膜炎、气胸
★★★☆☆
中枢神经因素
脑炎、心因性咳嗽
★☆☆☆☆

ACEI类咳嗽要点

  • 机制:抑制缓激肽降解
  • 特点:持续性干咳
  • 处理:停药,换ARB
  • 缓解时间:停药后4周内

(二)慢性咳嗽三大病因(★★★★★)

对比项
UACS(第一位)
CVA(第二位)
GERC(第三位)
核心机制
鼻分泌物倒流
气道高反应性
反流刺激
特征表现
白天咳+咽部异物感
夜间/凌晨干咳餐后/卧位加重
关键特点
清喉动作
冷空气诱发
75%无反酸
金标准
诊断性治疗有效
激发试验阳性24h食管pH监测
治疗
抗组胺+鼻用激素
ICS+LABAPPI 8-12周

【记忆口诀】

上气白天咽异感,CVA夜间冷诱发;反流餐后卧位重,抑酸八周效方达。


四、诊断与治疗

(一)辅助检查选择(★★★★☆)

检查
目的
考点
胸部X线首选筛查
所有咳嗽患者初筛
HRCT支扩确诊金标准
★★★★★
肺功能
判断通气障碍类型
FEV1/FVC<0.7=阻塞性
激发试验CVA诊断金标准
★★★★★
支气管镜
直视+活检
咯血、局限哮鸣音时用
24h食管pH监测GERC诊断金标准
★★★★☆

(二)治疗原则(★★★★★)

1、核心原则

  • 对因治疗为主,对症治疗为辅
  • 痰多者禁用强力镇咳药(防痰堵)

2、对因治疗速查

病因
治疗要点
感染
抗生素(细菌);抗结核(标准化疗)
CVAICS+LABA,疗程≥8周
UACS
抗组胺+鼻用激素
GERCPPI,疗程8-12周
ACEI咳嗽
停药换ARB,4周内缓解
支扩体位引流排痰
是基石

3、对症治疗

药物类型
代表药
要点
祛痰药
乙酰半胱氨酸、氨溴索
乙酰半胱氨酸断裂二硫键
中枢镇咳
右美沙芬
(非成瘾)
首选
中枢镇咳
可待因
(成瘾)
仅顽固性咳嗽
外周镇咳
苯丙哌林

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⚠️ 免责声明

本文为个人学习笔记,仅供医学同好交流参考。内容基于教材和临床资料整理,但难免存在疏漏或理解偏差。请读者结合教材、指南及临床实际进行交叉验证,若有疑问请以最新版教材为准。欢迎指正,共同精进。

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  1. CONNECT:[ UseTime:0.000566s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000791s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000330s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000284s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000517s ]
  6. SELECT * FROM `set` [ RunTime:0.000209s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000611s ]
  8. SELECT * FROM `article` WHERE `id` = 511588 LIMIT 1 [ RunTime:0.000457s ]
  9. UPDATE `article` SET `lasttime` = 1778845194 WHERE `id` = 511588 [ RunTime:0.000776s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000231s ]
  11. SELECT * FROM `article` WHERE `id` < 511588 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000387s ]
  12. SELECT * FROM `article` WHERE `id` > 511588 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000530s ]
  13. SELECT * FROM `article` WHERE `id` < 511588 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001805s ]
  14. SELECT * FROM `article` WHERE `id` < 511588 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002862s ]
  15. SELECT * FROM `article` WHERE `id` < 511588 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004953s ]
0.085960s