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规培理论考试-急性呼吸困难

  • 2026-02-01 15:29:29
规培理论考试-急性呼吸困难
一、临床表现
急性呼吸困难指突发或短期内出现的呼吸频率、节律、深度异常,伴气促、胸闷、发绀等不适,是急诊危重症状,需快速结合伴随症状和体征定位病因。

病因类别

核心疾病

特征性临床表现

呼吸系统疾病(主导)

1.急性呼吸窘迫综合征(ARDS);2.哮喘急性发作;3.慢性阻塞性肺疾病(COPD)急性加重;4.肺炎(重症);5.肺栓塞;6.气胸(张力性)

①哮喘/COPD:呼气性呼吸困难,伴哮鸣音;②肺炎/ARDS:吸气性呼吸困难,伴湿啰音、发绀;③肺栓塞:突发呼吸困难+胸痛+咯血(三联征);④张力性气胸:突发剧痛伴进行性呼吸困难,患侧胸廓饱满

心血管系统疾病

1.急性左心衰竭;2.急性心肌梗死;3.心包填塞;4.严重心律失常

①急性左心衰:夜间阵发性呼吸困难,咳粉红色泡沫痰,双肺湿啰音;②急性心梗:呼吸困难伴胸骨后压榨性胸痛;③心包填塞:呼吸困难+颈静脉怒张+血压下降(Beck三联征)

其他原因

1.窒息(异物/咯血);2.贫血(重度);3.代谢性酸中毒(糖尿病酮症酸中毒);4.焦虑症(惊恐发作)

①窒息:突发吸气性呼吸困难,伴发绀、烦躁;②代谢性酸中毒:深大呼吸(Kussmaul呼吸);③惊恐发作:呼吸困难伴濒死感,无器质性体征

二、急救措施

(一)紧急评估与气道保障(首要任务)

1.快速评估:立即检查生命体征(呼吸、血压、脉搏、血氧饱和度),识别危急信号(呼吸停止、发绀、意识障碍、休克);

2.气道管理:①保持气道通畅:清除口腔异物,头偏向一侧,必要时气管插管/气管切开;②氧疗:常规鼻导管/面罩吸氧,目标血氧饱和度90%~96%;重症者(ARDS/急性左心衰)需高流量氧疗或机械通气;

3.建立静脉通路:快速补液纠正休克,备好急救药品(肾上腺素、利尿剂等)。

(二)针对性急救措施(明确病因后立即实施)

病因

核心急救措施

急性左心衰竭

①端坐位,双下肢下垂(减少回心血量);②高流量吸氧+酒精湿化;③利尿剂(呋塞米静推);④血管扩张剂(硝酸甘油静滴);⑤正性肌力药物(多巴胺/多巴酚丁胺)

哮喘急性发作/COPD急性加重

①支气管舒张剂(沙丁胺醇+异丙托溴铵雾化吸入);②糖皮质激素(甲泼尼龙静滴);③抗感染(合并感染时);④避免使用镇静剂

张力性气胸

立即穿刺排气(锁骨中线第2肋间),必要时胸腔闭式引流

肺栓塞

①绝对卧床;②抗凝治疗(低分子肝素);③高危患者(休克/右心功能不全)尽早溶栓(尿激酶/链激酶)

窒息

立即海姆立克急救法,或支气管镜下清除异物;呼吸停止者同步心肺复苏

(三)一般支持治疗

卧床休息,监测心电、血氧、血压;纠正水电解质紊乱;烦躁不安者慎用镇静剂(避免抑制呼吸),必要时在机械通气支持下使用。

三、转运原则

(一)转诊指征(存在以下情况,需紧急转诊)

1.危及生命的呼吸困难:呼吸停止/濒于停止、严重发绀、意识障碍、感染性休克;

2.怀疑致命性病因:急性心梗、肺栓塞、ARDS、张力性气胸(需手术)、心包填塞;

3.经初步急救后:呼吸困难无缓解,血氧饱和度持续<90%;

4.特殊人群:新生儿/儿童严重呼吸困难、孕妇合并急性心衰/肺栓塞。

(二)转运前准备与安全保障

1.初步稳定:先纠正呼吸/循环衰竭(如气管插管、机械通气、抗休克),避免转运中病情恶化;

2.资料整理:整理病史、体格检查、辅助检查(心电图、胸片)结果,填写转诊记录,明确初步诊断和已采取的急救措施;

3.途中监护:配备急救设备(呼吸机、监护仪、急救药品),全程监测呼吸、心率、血氧饱和度,保持气道通畅,出现异常立即处理;

4.交接沟通:与接收科室(如呼吸ICU、心内科、胸外科)详细交接病情,确保诊疗连续性。

四、典型例题

1.急性左心衰竭所致呼吸困难的特征性表现是( )

A.呼气性呼吸困难伴哮鸣音

B.吸气性呼吸困难伴湿啰音

C.夜间阵发性呼吸困难伴粉红色泡沫痰

D.突发呼吸困难伴胸痛咯血

E.深大呼吸伴烂苹果味

答案:C

解析:急性左心衰竭典型表现为夜间阵发性呼吸困难,咳粉红色泡沫痰,双肺湿啰音;A是哮喘/COPD表现,B是ARDS/重症肺炎表现,D是肺栓塞表现,E是糖尿病酮症酸中毒表现,故C正确。

2.急诊处理急性呼吸困难的首要任务是( )

A.完善胸部CT明确病因

B.保持气道通畅并给予氧疗

C.静脉输注利尿剂

D.给予支气管舒张剂雾化

E.静脉使用糖皮质激素

答案:B

解析:急性呼吸困难最危急的是呼吸衰竭,首要任务是保持气道通畅,给予氧疗稳定生命体征;明确病因、针对性用药需在生命体征稳定后进行,故B正确。

3.患者,男,68岁,有COPD病史10年,突发呼吸困难加重,伴哮鸣音,血氧饱和度85%,最有效的急救措施是( )

A.静推呋塞米

B.沙丁胺醇+异丙托溴铵雾化吸入

C.静滴硝酸甘油

D.胸腔穿刺排气

E.高流量吸氧+酒精湿化

答案:B

解析:患者COPD急性加重,表现为呼气性呼吸困难伴哮鸣音,首选支气管舒张剂(沙丁胺醇+异丙托溴铵)雾化吸入缓解气道痉挛;A用于心衰,C用于冠心病,D用于气胸,E用于急性左心衰,故B正确。

4.下列属于急性呼吸困难紧急转诊指征的是( )

A.哮喘急性发作经雾化后呼吸困难缓解

B.急性左心衰经利尿后血氧饱和度升至92%

C.怀疑肺栓塞伴血压下降

D.轻度贫血所致呼吸困难

E.焦虑症惊恐发作

答案:C

解析:怀疑肺栓塞伴血压下降(休克体征),属于致命性病因,需紧急转诊;A、B经治疗后病情稳定,D、E无致命风险,均无需紧急转诊,故C正确。

5.张力性气胸所致急性呼吸困难的急救首选( )

A.机械通气

B.静脉输注抗生素

C.锁骨中线第2肋间穿刺排气

D.胸腔闭式引流

E.高流量吸氧

答案:C

解析:张力性气胸病情危急,可快速导致呼吸循环衰竭,急救首选锁骨中线第2肋间穿刺排气,快速缓解胸腔高压;胸腔闭式引流是后续确定性治疗,其余选项非首要急救措施,故C正确。

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  1. CONNECT:[ UseTime:0.001052s ] mysql:host=127.0.0.1;port=3306;dbname=b_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001682s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.019065s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.009515s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001731s ]
  6. SELECT * FROM `set` [ RunTime:0.004383s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001832s ]
  8. SELECT * FROM `article` WHERE `id` = 465589 LIMIT 1 [ RunTime:0.018442s ]
  9. UPDATE `article` SET `lasttime` = 1770327003 WHERE `id` = 465589 [ RunTime:0.004582s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000770s ]
  11. SELECT * FROM `article` WHERE `id` < 465589 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001735s ]
  12. SELECT * FROM `article` WHERE `id` > 465589 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006210s ]
  13. SELECT * FROM `article` WHERE `id` < 465589 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.016078s ]
  14. SELECT * FROM `article` WHERE `id` < 465589 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.058888s ]
  15. SELECT * FROM `article` WHERE `id` < 465589 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.018928s ]
0.286923s