感染控制与患者安全
方法
- 对每位患者都从标准预防开始:手卫生、针对预期暴露的个人防护装备、安全使用锐器。
- 按传播途径追加预防措施:接触传播(隔离衣、手套)、飞沫传播(外科口罩)、空气传播(N95、负压病房)。
- 保持无菌物品的无菌状态:如有疑问就视为不无菌;更换,绝不擦拭。
- 预防环境中的伤害:防跌倒措施,约束仅作为最后手段,火灾时用 RACE 和 PASS。
- 核对给药的正确原则、两个身份识别信息,以及对高警示药物的额外保障;报告差错和险兆事件。
公式表、每个专题的关键方法步骤和 6 道练习题,完整解答附在最后。
Why are blood cultures usually taken from two separate venipuncture sites?
A patient takes medicines prescribed by several providers. Which advice best reduces the risk of medication errors at home?
How should the heels of a bedbound patient at high risk be protected?
Why should only the patient press the button of a patient-controlled analgesia (PCA) pump?
下列哪一项是科赫法则之一?
R0(基本再生数)为 3 是什么意思?
答案: A · To help tell a true infection from skin contamination
If the same organism grows from both sets, it is more likely to be a true bloodstream infection. Growth in only one set may be contamination from the skin.
答案: D · Keep one up-to-date list of all medicines and use one pharmacy where possible
A single complete medication list and one pharmacy allow interactions and duplicates to be detected. The list, including over-the-counter drugs and supplements, is shown at every visit.
答案: A · Lift them off the mattress with a pillow under the calves
Heels have little padding and develop ulcers quickly. "Floating" them, with the support under the calves and the knee slightly bent, removes pressure from the heel.
答案: A · A drowsy patient stops pressing, which helps prevent overdose
If the patient becomes too sleepy they cannot press the button, so no more opioid is given. When others press it this safety is lost and respiratory depression can follow.
答案: D · 将该生物接种到健康易感宿主体内时,必须引起相同的疾病
科赫法则指出,该微生物必须在每个病例中都能找到,能进行纯培养,能在健康宿主中引起该病,并能从该宿主体内再次分离出来。有些病原体无法培养,因此这些法则有其局限性。
答案: B · 在完全易感人群中,平均一个病例会传染另外三个人
R0 是在所有人都易感时,一个病例平均引起的继发病例数。群体免疫大约需要 1 − 1/R0 的人群免疫:R0 = 3 时约为 67%。
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