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 40 道练习题,完整解答附在最后。
How is pitting oedema checked?
Five days after hip surgery, a patient suddenly becomes breathless with sharp chest pain and a fast heart rate. What should the nurse suspect?
Why must visible dirt be removed from equipment before it is disinfected?
一名意识混乱、戴着腕部约束带的患者,一只手的手指发凉、苍白,该侧桡动脉搏动减弱。护士首先应做什么?
Which postoperative patient should the nurse see first?
A patient on a cardiac monitor suddenly becomes unresponsive, and the monitor shows ventricular fibrillation. What is the priority once help has been called?
一名患者的 NEWS2 评分升至 7 分。恰当的应对是什么?
A patient has a blood pressure of 220/130 mmHg with headache, confusion and visual disturbance. Why is the blood pressure lowered in a controlled way rather than as fast as possible?
A 55-year-old has a positive fecal immunochemical test (FIT) during routine screening. What is the usual next step?
一名肾功能正常、心电图正常的患者钾为 6.2 mEq/L。实验室备注样本发生了溶血。最好的解释是什么?
How are most medication doses for children calculated?
哪种抗癫痫药在妊娠期服用时,引起神经管缺陷和发育问题的风险是众所周知最高的?
A patient on nasal cannula oxygen breathes mainly through the mouth. What is the most accurate statement?
A nurse teaches a patient who is starting warfarin. Which statement shows a need for further teaching?
A man starts finasteride for an enlarged prostate. Which statement is correct?
Which patient on a stroke unit is most at risk of falling?
Patients on immune checkpoint inhibitors may develop immune-related side effects. Which symptom should they report promptly?
A patient took a large paracetamol (acetaminophen) overdose 6 hours ago and says they feel completely well. Which statement is correct?
Which behaviour shows positive early bonding between mother and newborn?
A woman at 30 weeks is in a minor car accident. She feels fine and has no bleeding. What should the nurse advise?
Which medicine may be used to close a patent ductus arteriosus in a preterm baby?
A family with a 2-year-old has a swimming pool in the garden. Which measure gives the most protection against drowning?
一名患者说:“我一无是处。没有人关心我。”哪种回应最具治疗性?
During a session, a patient asks the nurse, "Are you married? Do you have children?" Which response is most appropriate?
练习题(虚构数值,不作为临床指导)。 一个剂量记录在 9:25 AM。哪个条目是 24 小时制中的同一时间?点击它。
练习题(虚构数值,不作为临床指导)。 一个班次中,患者摄入了½ tbsp / 液体营养补充剂, ½ 杯 / 茶, 3 tsp / 止咳糖浆。按给出的等量关系,求以 mL 表示的口服总摄入量V。
一名体重 29 kg 的患者体表面积为 0.98 m²。医嘱为 100 mg/m²。求剂量 D,以 mg 表示。
处方剂量为 0.17 mg。安瓿每 mL 含 1000 微克。请用 1 mL 注射器抽取剂量:应给多少体积 V?
用滴系数为 10 滴/mL 的输液器在 6 小时内输入 1000 mL。求滴速 R(滴/分)。 取整到最接近的整数。
200 mg 药物溶于 250 mL 的输液以 6 mL/h 运行。患者每分钟接受多少微克 D?
练习题(虚构数值,不作为临床指导)。 一袋中含肝素 25 000 单位,容量 250 mL。医嘱为 16 units/kg/h,患者体重 82 kg。输液泵速率 R 应设为多少 mL/h? 保留一位小数。
练习题(虚构数值,不作为临床指导)。 一名体重 89 kg 的患者的医嘱为nitroglycerin 5 mcg/min。输液袋中含 50 mg,容量 250 mL。求泵速 R,以 mL/h 计。 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。求总入量 I,以 mL 计。
练习题(虚构数值,不作为临床指导)。 一份 500 mL 的输液于 09:30 开始以 120 mL/h 输注。3 小时后速率改为 150 mL/h,之后不再改变。从开始算起多少小时 t 后袋子会输完? 保留一位小数。
练习题(虚构数值,不作为临床指导)。 一张练习图表记录了 GCS 11,其中 E3 和 V4。记录的运动评分M是多少,它描述的是哪种反应?请给出数字。
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 28 次/分,SpO₂ 96%吸室内空气,血压 118/70 mmHg,脉搏 64 次/分,清醒,体温 37.0 °C。患者属于哪个临床风险组?点击它。
某练习动脉血气显示 pH 7.37,PaCO₂ 62 mmHg (8.3 kPa),HCO₃⁻ 35 mmol/L。原发性紊乱是呼吸性酸中毒。代偿到什么程度?点选你的答案。
某练习血气显示 pH 7.32,PaCO₂ 36 mmHg (4.8 kPa),HCO₃⁻ 18 mmol/L,Na⁺ 143,Cl⁻ 104 mmol/L。利用阴离子间隙和 Δ 比值,点选最合适的解读。
解读这条 II 导联心律条带。这是什么节律?点击你的答案。
请解读这条 II 导联心电图条带。仅凭这一条心电图条带,你能为哪种解读辩护?点击你的答案。
答案: B · Press over a bony area such as the shin for a few seconds and look for a dent
Pressing over a bony surface pushes fluid out of the tissue; a dent that stays shows pitting oedema. Its depth and how long it lasts are recorded.
答案: D · A pulmonary embolism
Sudden breathlessness, pleuritic chest pain and tachycardia after surgery suggest a clot from the leg has reached the lungs. This is an emergency needing urgent medical review.
答案: C · Organic matter can shield organisms and weaken the disinfectant
Blood, secretions and soil protect organisms and can inactivate disinfectants. Cleaning is always done first, followed by disinfection or sterilization as required.
答案: D · 松开该侧约束带并评估手部的血液循环
约束带远端出现循环不良的征象,需要立即松开并评估。只有在仍有必要时才正确重新系上,并用两指检查法确认,同时上报并记录发现。
答案: D · Dressing soaked with bright red blood and a heart rate rising to 118/min
Heavy fresh bleeding with a rising heart rate suggests hemorrhage and early shock. The other patients have routine needs that can wait.
答案: D · Defibrillate as soon as the defibrillator is available, with CPR until then
Ventricular fibrillation is a shockable cardiac arrest rhythm. Early defibrillation, with high-quality CPR until the shock is given, is the most important treatment.
答案: D · 由具备危重症救治能力的临床团队进行紧急评估
在 NEWS2 中,7 分或以上触发紧急响应,通常需要持续监护,并由有能力处理危重患者的团队紧急评估。
答案: D · A sudden drop can reduce blood flow to the brain, heart and kidneys
In a hypertensive emergency, autoregulation in vital organs is reset to higher pressures. Lowering BP too fast can cause ischaemia, so it is reduced gradually under close monitoring.
答案: B · Referral for colonoscopy
A positive FIT means hidden blood in the stool, which may come from a polyp, cancer or other lesion, so a colonoscopy is needed to find the source. A positive screening test is never ignored, even without symptoms.核对依据: Fecal Occult Blood Test (FOBT) · MedlinePlus (NIH) (2024)
答案: B · 结果可能是假性偏高;评估患者并安排重新采样
红细胞富含钾。当它们在试管中破裂(由于止血带过紧、握拳或针头太细)时,钾漏出,结果呈假性偏高。护士仍应评估患者并重复检测,因为不能漏掉真正的高钾血症。核对依据: Potassium Blood Test · MedlinePlus (NIH) (2024)
答案: D · By body weight in kilograms, or sometimes body surface area
Children's doses are usually weight-based, sometimes using body surface area, and must not exceed the adult maximum. Accurate, recent weight in kilograms is essential.
答案: B · 丙戊酸钠
丙戊酸盐具有强致畸性,可引起神经管缺陷和其他畸形,并影响神经发育。除非没有其他有效替代药物,妊娠期应避免使用。
答案: C · It can still work, because oxygen collects in the nasopharynx
Studies show that mouth breathing still draws in oxygen from the nasopharynx, so nasal cannulae can work. The effect is judged by the SpO₂, and the device is changed if targets are not reached. Cannulae are never placed in the mouth.
答案: D · "If I miss a dose, I will take two the next day."
Doubling up after a missed dose can cause over-anticoagulation and bleeding. Patients are usually told to take a missed dose the same day if they remember, or skip it and record it, then seek advice. Regular INR checks, telling other clinicians and checking interactions are correct.
答案: C · It takes months to work; pregnant women must not handle broken tablets
Finasteride, a 5-alpha reductase inhibitor, reduces the conversion of testosterone to dihydrotestosterone and shrinks the prostate over several months. It can harm a male fetus, so pregnant women should avoid handling crushed or broken tablets.
答案: D · A patient with a right-hemisphere stroke who is impulsive and denies having weakness
Right-hemisphere strokes often cause left-sided neglect, poor judgement, impulsivity and denial of the deficit. These patients may try to get up alone. Patients with left-hemisphere strokes are often more cautious.
答案: C · New diarrhoea or abdominal pain
Checkpoint inhibitors can cause immune-mediated colitis, pneumonitis, hepatitis, skin reactions and endocrine problems. Early reporting allows grading and treatment, often with corticosteroids.
答案: A · Liver damage may still develop, and appears only days later
Early after paracetamol overdose, patients often have no or few symptoms, but liver injury peaks after about 3–4 days. Treatment with acetylcysteine is guided by timed paracetamol levels and the history.
答案: C · Face-to-face eye contact and talking to the baby
En face positioning, touching, talking in a high-pitched voice and calling the baby by name are positive bonding behaviours. Persistent avoidance needs further assessment and support.
答案: C · Come in for fetal monitoring even without symptoms
Even minor trauma can cause placental abruption, sometimes without bleeding. Pregnant women after trauma are usually monitored with CTG for several hours. Rh-negative women may need anti-D.
答案: A · Ibuprofen or indomethacin
Indomethacin and ibuprofen inhibit prostaglandin production and can close a patent duct in preterm infants; paracetamol is also used in some units. Prostaglandin E1 does the opposite and keeps the duct open.
答案: B · A four-sided fence with a self-closing, self-latching gate, plus constant supervision
Isolation fencing that fully separates the pool from the house and garden, combined with active adult supervision, is the most effective protection. Flotation aids and lessons do not replace supervision, and toddlers cannot reliably follow safety rules.
答案: B · “你觉得没有人关心你。再多跟我说说。”
反映是承认患者的感受并鼓励其继续说下去。反驳、不赞成或转移话题都会阻碍沟通。
答案: D · Answer briefly or decline politely, then return the focus to the patient
Patients often ask personal questions out of curiosity or to make the relationship more equal. A brief answer or a polite refusal, followed by redirecting to the patient's concerns, maintains boundaries without rejecting the patient.
答案: 09:25
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: V = 142.5 mL
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: D = 98 mg
Body-surface-area dosing: many cytotoxic and some paediatric doses are prescribed per square metre of body surface area: dose (mg) = dose per m² × BSA (m²). The Mosteller formula estimates BSA = √(height (cm) × weight (kg)/3600).
答案: V = 0.17 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。
答案: R = 28 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。
床旁取最接近的整滴:28 滴/分。
答案: D = 80 mcg/min
Dose-based infusions: concentration = amount of drug in the bag/bag volume. Pump rate (mL/h) = dose per hour/concentration, and dose per hour = mL/h × concentration. Convert per-minute doses to per-hour (× 60) and keep the mass units the same (1 g = 1000 mg, 1 mg = 1000 mcg).
答案: R = 13.1 mL/h
肝素和胰岛素输注:浓度 = 袋中单位数/袋容量 (units/mL)。泵速 (mL/h) = 每小时单位数/浓度,每小时单位数 = mL/h × 浓度。按体重给药时,先求 units/h = units/kg/h × 体重。推注体积 = 所需单位数/药瓶规格。 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: R = 1.5 mL/h
滴定输注:先求以 mcg/mL 计的浓度(mg × 1000/mL)。按体重给药时,mcg/min = mcg/kg/min × 体重。然后 mL/h = mcg/min × 60/浓度。反推时,mcg/kg/min = mL/h × 浓度/(60 × 体重)。 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。
医嘱是针对患者整体的每分钟剂量,所以不需要体重。
答案: I = 1240 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。
答案: t = 3.9 h
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。
约为 3 h 56 min,所以袋子大约在 13:26 输完。
答案: M = 4
格拉斯哥昏迷量表:把三个方面的最佳反应相加。睁眼 E:4 自发,3 对声音或言语,2 对压迫,1 无。言语 V:5 定向正常,4 意识模糊,3 用词不恰当,2 发出无法理解的声音,1 无。运动 M:6 遵嘱动作,5 定位,4 正常屈曲(回缩),3 异常屈曲,2 伸展,1 无。总分为 3 至 15。头部损伤后,13–15 通常称为轻度,9–12 为中度,3–8 为重度。
答案: 中低
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。
即使总分低,单项得 3 分也需要紧急会诊。
答案: 完全代偿
解读血气(ROME):先看 pH:低于 7.35 为酸血症,高于 7.45 为碱血症。然后找出能解释它的指标。PaCO₂(正常 35–45 mmHg,4.7–6.0 kPa)是呼吸方面的指标,在呼吸性紊乱中与 pH 反向(Opposite)变化;HCO₃⁻(正常 22–26 mmol/L)是代谢方面的指标,与 pH 同向变化(Respiratory Opposite, Metabolic Equal,即呼吸性相反,代谢性相同)。另一个指标显示代偿情况:正常表示未代偿;沿着使 pH 回升的方向异常、而 pH 仍然异常,表示部分代偿;pH 正常而两个指标都异常,表示完全代偿。各实验室的范围略有差异;这些是练习用数值。
答案: 单纯高间隙酸中毒
预期代偿:代谢性酸中毒时,温特公式预测 PaCO₂ = 1.5·HCO₃⁻ + 8 ± 2 mmHg;实测值高于该范围提示合并呼吸性酸中毒,低于该范围提示合并呼吸性碱中毒。阴离子间隙 AG = Na⁺ − (Cl⁻ + HCO₃⁻),正常约为 8–12 mmol/L,用于区分高阴离子间隙与正常阴离子间隙代谢性酸中毒;低白蛋白会掩盖升高的间隙(白蛋白低于 4.0 的部分,每 g/dL 加 2.5)。Δ 比值 (AG − 12)/(24 − HCO₃⁻) 约在 0.8 到 2 之间符合单纯高间隙酸中毒(有些教材用 1 代替 0.8),低于此范围提示合并正常间隙酸中毒,高于 2 提示合并代谢性碱中毒。
答案: 交界性心律
节律标准(II 导联):窦性心律每个 QRS 之前都有直立的 P 波,PR 恒定为 0.12–0.20 s,QRS 狭窄:60–100 次/分为正常窦性心律,低于 60 为窦性心动过缓,高于 100 为窦性心动过速。心房颤动:无 P 波,基线呈颤动,R–R 绝对不规则。心房扑动:约 250–350 次/分的锯齿状扑动波,伴固定的传导比例,如 2:1 或 4:1。一度房室传导阻滞:窦性心律,PR 恒定且大于 0.20 s。交界性心律:窄 QRS,40–60 次/分,P 波缺失或倒置(PR 低于 0.12 s,或 P 波在 QRS 之后)。室性早搏(PVC)是提前出现的宽大(0.12 s 或以上)、形态怪异的 QRS,没有 P 波,T 波方向相反,通常有完全性代偿间歇;二联律是指每隔一个搏动就有一个室性早搏。
答案: 2:1 房室传导阻滞(类型未定)
2:1 房室传导阻滞:每个 QRS 对应两个 P 波时,没有两个下传的 P 波连续出现,所以无法看出在未下传的 P 波之前,PR 间期是逐渐延长(I 型)还是保持恒定(II 型)。仅凭一条心电图条带,只能称为 2:1 房室传导阻滞;更长的条带或传导比例的改变才能决定类型。QRS 较窄时更可能是 I 型,QRS 增宽时更可能是 II 型,但两者都不能证明。
QRS 较窄时更可能是 I 型,QRS 增宽时更可能是 II 型,但只有更长的条带或传导比例的改变才能决定。
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