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 34 道练习题,完整解答附在最后。
A patient with expressive aphasia after a stroke understands speech but struggles to find words. Which approach helps most?
In an emergency a doctor gives a verbal order for a medicine. What should the nurse do?
An alcohol-based skin prep has been used before surgery with electrosurgery. What must happen before the drapes are placed?
Only one airborne infection isolation room (negative pressure) is free. Which newly admitted patient should be placed in it?
A patient is raising his voice, pacing and clenching his fists. What should the nurse do first?
一名带有中心静脉导管的患者在拔除导管时突然呼吸急促,伴胸痛,SpO₂ 下降。护士首先做什么?
HbA1c 测量的是什么?
An older patient has fallen several times since starting a new medicine. Which drug group is most likely to contribute?
A patient on carbamazepine becomes confused and has a headache. Which laboratory result would most likely explain this?
一名钠为 132 mEq/L、血糖为 600 mg/dL(33.3 mmol/L)的患者入院。为什么要谨慎解读钠的数值?
A patient uses two different eye drops at the same time of day. What should the nurse advise?
A patient with diabetic ketoacidosis is about to start an IV insulin infusion. Serum potassium is 3.1 mmol/L (mEq/L). Why is this a concern?
Which exercise advice is recommended for intermittent claudication?
On the first day after abdominal surgery, a patient has a temperature of 37.8 °C, SpO₂ 93% on air and reduced breath sounds at both bases. They have stayed in bed because of pain. What is the most likely cause and response?
Why is pyridostigmine often taken about 30–60 minutes before meals by patients with myasthenia gravis?
After a stroke, a patient suddenly cries or laughs at odd moments. They say they do not feel sad. Which response is most appropriate?
给予细胞毒性化疗药物时,通常推荐使用哪种个人防护装备?
A nurse teaches a patient with chronic pancreatitis. Which statement shows a need for further teaching?
Why is congenital hypothyroidism included in newborn screening?
A woman at 26 weeks receiving terbutaline for preterm contractions has a heart rate of 132/min and chest tightness. What should the nurse do?
护士应如何为一名 4 岁儿童做操作前的准备?
After hypospadias repair, a toddler has a urinary catheter. Which nursing action has priority?
A patient taking valproate is starting lamotrigine. Why must lamotrigine be increased especially slowly?
A resident with Alzheimer's disease becomes very agitated and hits out when staff try to help him bathe. What is the best approach?
练习题(虚构数值,不作为临床指导)。 一位患者身高 6 ft 6 in。按 1 ft = 12 in 和 1 in = 2.54 cm,求以厘米表示的身高h,取到最接近的整厘米。
练习题(虚构数值,不作为临床指导)。 一次输注从 21:20 开始,到次日早晨 05:50 结束(24 小时制)。它运行了多少小时t?答案以小数表示小时数,取到两位小数。
某患者体重 45 kg。医嘱剂量为每天 5 mg/kg,分 3 次等量给药。每次给多少毫克 D?
处方为 750 单位的药物,药液规格为 1000 单位/mL。请用 1 mL 注射器抽取剂量:应给多少体积 V?
用滴系数为 20 滴/mL 的输液器在 5 小时内输入 1500 mL。求滴速 R(滴/分)。
一组输液以 30 滴/分的速度经 15 滴/mL 的输液器滴注。袋中还剩 400 mL。还需多少小时 t 才会滴完? 保留一位小数。
练习题(虚构数值,不作为临床指导)。 记录显示了一名患者在一个 8 小时班次中的出入量。静脉输液在整个班次中按所示速率输注。求液体平衡 B = 入量 − 出量,以 mL 计(答案为负表示净丢失)。 冰屑按其体积的一半计。
练习题(虚构数值,不作为临床指导)。 一袋 500 mL 的液体于 06:30 开始用输液泵以 100 mL/h 输注。到 10:30 时袋中还剩多少 mL V?
练习题(虚构数值,不作为临床指导)。 用 Braden 量表评估一位练习患者:感觉知觉: 完全受限; 潮湿程度: 持续潮湿; 活动: 局限于椅子; 活动能力: 完全不能活动; 营养: 非常差; 摩擦力和剪切力: 有问题。求 Braden 总分B。
练习题(虚构数值,不作为临床指导)。 对这些观察结果使用 NEWS2 图表(SpO₂ 量表 1):呼吸频率 12 次/分,SpO₂ 96%正在补充吸氧,血压 96/58 mmHg,脉搏 64 次/分,清醒,体温 35.2 °C。患者属于哪个临床风险组?点击它。
答案: D · Ask simple yes/no questions and allow plenty of time
Short questions that can be answered with yes, no or a gesture, picture boards and patience let the patient communicate. Hearing is not the problem, so shouting does not help.
答案: B · Write it down, read it back and make sure it is signed later as per policy
Verbal orders are used only where local policy allows, such as emergencies. Reading back the drug, dose and route confirms the order, and it is documented and signed as soon as possible.
答案: B · The prep must be fully dry and any pooled liquid removed
Wet alcohol prep and its vapors under drapes can be ignited by electrosurgery or lasers. The prep is allowed to dry fully, and pooling in skin folds or linen is prevented.
答案: B · A patient with suspected active pulmonary tuberculosis
Tuberculosis needs airborne precautions in a negative-pressure room. Influenza needs droplet precautions and MRSA and C. difficile need contact precautions, which can be given in an ordinary single room.
答案: A · Speak calmly, keep a safe distance and invite him to talk about what is wrong
Early verbal de-escalation, with a calm voice and a safe distance, is the first approach for rising agitation. Restraint is a last resort, and crowding the patient can make things worse.
答案: A · 覆盖穿刺部位,使患者向左侧卧头低位,给氧并呼叫援助
拔管时出现这些征象提示空气栓塞。用密闭敷料覆盖部位可阻止更多空气进入,左侧卧头低位有助于将空气困在右心,使其远离肺动脉。随后给氧并紧急求助。
答案: C · 大约过去两到三个月的平均血糖
HbA1c 反映红细胞生命周期内血红蛋白的糖化程度,可用来估计长期血糖控制情况。
答案: A · Benzodiazepine sleeping tablets
Sedatives, hypnotics, antipsychotics and drugs that lower blood pressure increase falls risk. A medication review is part of every falls assessment.
答案: A · A low serum sodium
Carbamazepine (and oxcarbazepine) can cause hyponatremia by increasing the effect of ADH, which can cause confusion, headache and seizures. The drug can also cause serious blood disorders, so the CBC is monitored.核对依据: Syndrome of Inappropriate Antidiuretic Hormone Secretion · StatPearls (NCBI Bookshelf) (2023); Carbamazepine · StatPearls (NCBI Bookshelf) (2023)
答案: D · 高血糖把水吸入血液,稀释了钠
高血糖把水从细胞吸入血液,使测得的钠降低。随着血糖得到治疗,钠通常会升高。常用的校正方法是,血糖每高于 100 mg/dL 的 100 mg/dL,增加约 1.6–2.4 mEq/L 的钠。核对依据: Sodium blood test · MedlinePlus (NIH) (2025)
答案: B · Wait at least 5 minutes between the two drops
Waiting several minutes allows the first drop to be absorbed before the next is applied. Eye ointments are usually applied last.
答案: C · Insulin moves potassium into cells, so the level can fall dangerously low
Insulin drives potassium into cells, so a low starting level can become life-threatening hypokalaemia with arrhythmias. Potassium is replaced and monitored closely; the 2024 international consensus (ADA and others) delays insulin until potassium is above 3.5 mmol/L, while UK JBDS guidance adds potassium to the fluids and asks for senior review.
答案: D · Supervised walking until pain is near maximal, then rest and repeat
Supervised exercise programmes, walking to near-maximal claudication pain, resting and repeating for about 30 minutes several times a week, improve walking distance. With smoking cessation, an antiplatelet and a statin, this is first-line management.
答案: B · Atelectasis: give analgesia, deep breathing and mobilisation
Atelectasis is common in the first days after surgery, especially upper abdominal surgery, due to pain, shallow breathing and immobility. It can cause a low-grade fever and reduced basal breath sounds. Good analgesia, deep breathing exercises, coughing with wound support and early mobilisation reverse it and prevent pneumonia.
答案: B · To improve the strength of chewing and swallowing at mealtimes
Pyridostigmine inhibits acetylcholinesterase, so more acetylcholine is available at the neuromuscular junction. Timing it before meals gives the best muscle strength for chewing and swallowing, which lowers the risk of aspiration.
答案: C · Explain that this is emotional lability after stroke and help the family understand
Emotional lability (pseudobulbar affect) is common after stroke: crying or laughter does not match the person's mood. Explaining it, staying calm and gently distracting the patient helps. True depression is also common and should be screened for separately.
答案: A · 经化疗药物测试的手套和防渗隔离衣
细胞毒性药物可经皮肤吸收或被吸入。工作人员使用经化疗药物测试的手套(常为双层)、防渗长袖隔离衣,可能飞溅时还需护目装备,并使用密闭系统装置和安全处置。
答案: A · "I'll take my enzyme capsules at bedtime."
Pancreatic enzymes must be taken with meals and snacks to digest them. Alcohol must be avoided, steatorrhoea suggests under-replacement, and thirst or polyuria can signal diabetes from loss of islet cells.
答案: A · Early treatment prevents brain damage
Untreated congenital hypothyroidism causes poor growth and intellectual disability. Daily levothyroxine started in the first weeks allows normal development.
答案: C · Withhold the next dose and report the findings
Terbutaline can cause maternal tachycardia, palpitations, chest pain, pulmonary oedema and hyperglycaemia, so it is used only short term. A maternal heart rate above about 120/min or chest pain means the drug should be held and the provider informed.
答案: C · 在操作前不久用简单的话解释,并让孩子摸一摸器械或在玩偶身上玩一玩
学龄前儿童最适合在操作前不久得到简短、具体的解释,并配合医疗游戏。提前很久预告会增加恐惧,示意图更适合学龄儿童。
答案: D · Keep the catheter draining freely and check for kinks or blockage
After repair, the catheter or stent protects the new urethra while it heals. It must drain freely; blockage causes bladder spasm and pressure on the repair. Fluids are encouraged, and the dressing is managed as the surgeon directs.
答案: B · Valproate raises lamotrigine levels, which increases the risk of a serious rash
Valproate inhibits the metabolism of lamotrigine, roughly doubling its levels. Because lamotrigine rash, including Stevens-Johnson syndrome, is linked to rapid dose increases, a slower titration is used.
答案: B · Stop, try again later or in a different way, and explain each step calmly
Bathing can feel frightening or undignified. Changing the timing, approach or method, for example a bed bath or shower, giving simple explanations and keeping him covered and warm often reduces distress without force.
答案: h = 198 cm
家用计量和体重:护理考试使用取整的等量关系:1 茶匙(tsp)= 5 mL,1 汤匙(tbsp)= 15 mL = 3 tsp,1 液量盎司(fl oz)= 30 mL = 2 tbsp,1 杯 = 8 fl oz = 240 mL。体重方面,1 kg = 2.2 lb,1 lb = 16 oz;长度方面,1 英寸 = 2.54 cm。设置换算时,要让你不需要的单位相互约去。
答案: t = 8.5 h
24 小时制:下午 1 点起,小时数加 12(下午 3:45 = 15:45)。午夜到凌晨 12:59 为 00:00–00:59,中午 12:00–12:59 仍为 12:00–12:59。反过来换算时,13–23 点减 12 并标为下午;00 点变为凌晨 12 点。跨午夜计算时间要分两段:先算到 24:00(00:00),再从 00:00 算起。
答案: D = 75 mg
剂量计算:给药量等于医嘱剂量除以现有药物的规格,再乘以该规格对应的量:给药量 = (医嘱剂量/储备规格) × 储备体积。始终统一单位(先把 g 换成 mg,mg 换成 mcg),并检查答案是否合理。
答案: V = 0.75 mL
抽取剂量:体积 = (处方剂量/药物浓度) × 药物体积。先换算成相同的单位,再检查该体积是否适合注射器,并落在它的某一个刻度上。
在这支 1 mL 的注射器上,每条小刻度线代表 0.01 mL。
答案: R = 100 gtt/min
输注速率:输液泵按 mL/h = 体积/时间(小时)设定。重力滴注按每分钟滴数计:gtt/min = 体积 (mL) × 滴系数 (gtt/mL)/时间 (min)。 滴系数印在输液器包装上:普通输液器为 10、15 或 20 gtt/mL(输血器在美国常为 10 gtt/mL,在英国为 15),微量输液器为 60 gtt/mL。务必使用题目或包装给出的滴系数。
答案: t = 3.3 h
输注速率:输液泵按 mL/h = 体积/时间(小时)设定。重力滴注按每分钟滴数计:gtt/min = 体积 (mL) × 滴系数 (gtt/mL)/时间 (min)。 滴系数印在输液器包装上:普通输液器为 10、15 或 20 gtt/mL(输血器在美国常为 10 gtt/mL,在英国为 15),微量输液器为 60 gtt/mL。务必使用题目或包装给出的滴系数。
答案: B = 210 mL
出入量:入量计入所有进入体内的液体(口服液体、静脉输液、静脉用药及冲管液、管饲);冰屑按其体积的一半计。出量计入尿液、引流液、呕吐物和其他丢失。平衡 = 总入量 − 总出量;平衡为负表示净丢失。 这些数字仅供练习;在临床工作中务必遵循当地规程,高危剂量须经双人核对。
为正:摄入的液体多于排出的液体。
答案: V = 100 mL
输液时间:时间 (h) = 待输体积 (mL)/速率 (mL/h);使用袋中剩余的体积,而不是袋的容量。已输入体积 = 速率 × 时间。把小数小时换算为小时和分钟时,用小数部分 × 60(0.5 h = 30 min,而不是 50 min)。 这些数字仅供练习;在临床工作中务必遵循当地规程,高危剂量须经双人核对。
答案: B = 7
Braden 量表:评估压力性损伤风险的六个分项。感觉知觉、潮湿程度、活动、活动能力和营养各评 1 至 4 分,从最差水平(1)到无问题(4);摩擦力和剪切力评 1 至 3 分。总分为 6 至 23,总分越低风险越高。常用分级:19–23 无风险,15–18 轻度风险,13–14 中度风险,10–12 高风险,9 分及以下为极高风险。
答案: 中
NEWS2(国家早期预警评分 2,英国皇家内科医师学会 2017):按图表为七个参数分别评分(呼吸频率、量表 1 的 SpO₂、吸空气还是吸氧、收缩压、脉搏、按 ACVPU 量表评定的意识状态和体温),然后把分数相加。临床风险:0–4 为低;任何单项参数得 3 分为中低;5–6 为中;7 或以上为高。总分 5 或以上需要紧急响应。
总分 5 或以上需要紧急的临床响应。
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