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外科围手术期抗菌药物预防用药.ppt

  • 2026-04-07 01:15:41
外科围手术期抗菌药物预防用药.ppt

一、预防用药的目的与适应证

(一)核心目的

仅预防与手术直接相关的手术部位感染(SSI,包含浅层切口、深层切口、器官 / 腔隙感染;不覆盖与手术无直接关联的术后其他部位感染。

(二)用药适应证

需满足任一情形:

  1. Ⅱ、Ⅲ 类污染切口手术(胃肠道、呼吸道、女性生殖道手术等);
  2. 植入人工材料 / 装置的清洁手术(人工关节、心脏瓣膜、血管、起搏器植入等);
  3. 涉及重要脏器的清洁大手术(颅脑、心脏、大血管手术,感染后果严重);
  4. 术前已发生污染的手术(开放性创伤等);
  5. 患者存在感染高危因素(高龄、免疫低下、糖尿病、营养不良、肥胖等)。

(三)无用药指征情形

清洁(Ⅰ 类切口)的中、小手术,一般无需预防使用抗菌药物。


二、抗菌药物选择与联合用药原则

(一)药物选择核心原则

  1. 覆盖手术野污染最常见菌种,疗效明确;
  2. 安全、使用便捷、价格相对低廉;
  3. 切口感染:重点覆盖葡萄球菌;器官 / 腔隙感染:需覆盖肠杆菌目细菌;
  4. 首选:第一、二代头孢菌素(最符合临床需求,为常规用药);
  5. 慎用:喹诺酮类(我国细菌耐药率高,不用于 SSI 常规预防)。

(二)联合用药原则

仅在以下手术中联合:涉及口腔、下消化道、阴道的手术,加用抗厌氧菌药物(如甲硝唑);其余所有手术:一般无需联合用药。


三、抗菌药物给药规范

(一)用药时机与滴注要求

给药时机需精准,保证手术时血药浓度达标,过早 / 过晚均降低预防效果:

  1. 头孢菌素:术前0.5~1 小时静脉给药,30 分钟内滴完;
  2. 万古霉素、去甲万古霉素、克林霉素、喹诺酮类:术前2 小时静脉给药,滴注 1~2 小时。

(二)单次给药剂量(常规推荐)

  1. 头孢类:唑林钠 1~2g、呋辛 1.5g、西丁 1~2g、美唑 1~2g、曲松钠 1~2g;
  2. 其他抗菌药:氨曲南1g、克林霉素 600~900mg、万古霉素 1g、去甲万古霉素 0.8g、环丙沙星 500mg;
  3. 抗厌氧菌药:甲硝唑 0.5~1g、奥硝唑 1~1.5g、吗啉硝唑 0.5~1g。

(三)追加剂量原则

满足任一条件需追加 1 个剂量:

  1. 手术时间超过所用药物半衰期的 2 倍(头孢菌素半衰期 3 小时,头孢曲松钠除外);
  2. 术中失血量超过 1500ml。

(四)疗程规范

以短疗程为核心,避免长期用药:

  1. 择期手术:术后24 小时内停药;手术时间≤2 小时者,单次用药即可;
  2. 特殊情况:存在明显感染高危因素、植入人工材料,可延长至术后48 小时
  3. 术前已有感染者:按治疗性用药确定疗程,非预防用药范畴。

(五)青霉素 / 头孢菌素过敏者替代方案

按目标菌针对性选择,必要时联合:

  1. 针对革兰氏阳性球菌:万古霉素、去甲万古霉素、克林霉素;
  2. 针对革兰氏阴性杆菌:氨曲南。

(六)耐药菌高危患者感染治疗调整(碳青霉烯耐药肠杆菌 CRE)

  1. 非产金属酶CRE:首选头孢他啶 / 阿维巴坦单药
  2. 产金属酶 CRE:多黏菌素 + 碳青霉烯,或头孢他啶 / 阿维巴坦 + 氨曲南;
  3. 通用原则:初始治疗反复发热>3 天需全面复查;病情稳定但持续发热需调药,考虑真菌 / 其他病原体;血流动力学不稳定者,扩展覆盖革兰氏阴 / 阳性菌、厌氧菌、真菌。

四、各科室常见手术推荐用药方案

(一)颅脑与头颈部手术

  1. 颅脑 / 脑脊液分流手术:头孢唑林钠 / 头孢呋辛;MRSA 高发机构用万古霉素 / 去甲万古霉素;
  2. 头颈部(含甲状腺)手术:头孢唑林钠 / 头孢呋辛(无高危因素者无需用药);
  3. 涉及口咽黏膜的颌面部手术:头孢唑林钠 + 甲硝唑。

(二)心血管与外周血管手术

  1. 心脏大血管手术:头孢唑林钠 / 头孢呋辛(人工瓣膜置换术拔胸骨后引流管后停药);MRSA 高发机构用万古霉素 / 去甲万古霉素;
  2. 周围血管手术:头孢唑林钠 / 头孢呋辛(适用于人工血管植入、永久起搏器安装、切口涉及腹股沟);
  3. 血管内留置支架 / 异物:头孢唑林钠 / 头孢呋辛(单纯诊断性血管介入无需用药)。

(三)腹部与消化道手术

  1. 胃 / 十二指肠 / 空肠手术、经皮内镜胃造口术:头孢唑林钠 / 头孢呋辛 / 头孢美唑 / 头孢西丁;
  2. 远段回肠 / 阑尾 / 结肠 / 直肠手术:头孢呋辛 + 甲硝唑,或头孢美唑 / 头孢西丁(结直肠择期手术可术前 1 天口服新霉素 / 红霉素 + 甲硝唑);
  3. 肝胆系统手术:头孢呋辛 / 头孢曲松钠 ± 甲硝唑,或头霉素类;
  4. 内镜逆行胰胆管造影术(ERCP):头孢曲松钠 / 头孢呋辛术前 1 次;引流不充分者术后用药 24~48 小时。

(四)泌尿外科手术

  1. 常规泌尿外科手术:头孢唑林钠 / 头孢呋辛 / 环丙沙星(术前有菌尿症者先治疗);
  2. 膀胱镜检查 / 经膀胱镜侵入性操作 / 经直肠前列腺活检:环丙沙星单次口服(仅高危因素者用,术前 1 小时给药)。

(五)妇产科手术

  1. 常规妇科手术:头孢唑林钠 / 头孢呋辛(涉及阴道时,加甲硝唑或改用头孢美唑 / 头孢西丁);
  2. 剖宫产:头孢唑林钠(术前给药比结扎脐带后给药,切口感染预防效果更佳);
  3. 人工流产术:多西环素(术前 1 小时 100mg 口服,术后 30 分钟 200mg 口服);
  4. 宫颈扩张 / 刮宫术:头孢唑林钠(仅高危因素者用)。

(六)骨科与关节手术

  1. 一般骨科 / 下肢截肢术:头孢唑林钠 / 头孢呋辛(缺血性截肢术可用头孢美唑 / 头孢西丁);
  2. 人工植入物骨科手术:头孢唑林钠 / 头孢呋辛(粉碎性骨折内固定术后用药 1~3 天;开放性骨折 5~10 天);
  3. 髋 / 膝关节置换术:头孢唑林钠 / 头孢呋辛;MRSA 高发机构用万古霉素 / 去甲万古霉素;
  4. 人工关节置换术后 2 年内侵入性操作(如困难拔牙):阿莫西林 / 克拉维酸(625mg)或头孢呋辛酯(0.5g),术前 1 小时口服。

五、核心总结与关键提醒

  1. 目的明确:仅限预防手术部位感染,严禁扩大预防范围;
  2. 指征从严:清洁中小手术无需用药,仅污染、高危、重要脏器手术考虑;
  3. 选药精准:首选一、二代头孢,避免喹诺酮类,仅特定手术联用抗厌氧菌药;
  4. 时机恰当:按药物类型把控术前给药时间,保证手术中有效血药浓度;
  5. 疗程缩短:择期手术术后 24 小时内停药,特殊情况不超过 48 小时;
  6. 过敏替代:按革兰氏阴 / 阳性目标菌,选择万古霉素、克林霉素或氨曲南,避免过敏风险。

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  1. CONNECT:[ UseTime:0.000447s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000592s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000544s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000309s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000542s ]
  6. SELECT * FROM `set` [ RunTime:0.000250s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000583s ]
  8. SELECT * FROM `article` WHERE `id` = 489905 LIMIT 1 [ RunTime:0.001146s ]
  9. UPDATE `article` SET `lasttime` = 1775980695 WHERE `id` = 489905 [ RunTime:0.001340s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000302s ]
  11. SELECT * FROM `article` WHERE `id` < 489905 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000447s ]
  12. SELECT * FROM `article` WHERE `id` > 489905 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000434s ]
  13. SELECT * FROM `article` WHERE `id` < 489905 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000991s ]
  14. SELECT * FROM `article` WHERE `id` < 489905 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000677s ]
  15. SELECT * FROM `article` WHERE `id` < 489905 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001957s ]
0.078898s