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。
A patient you are walking with starts to fall. What should you do?
A postoperative wound drain that had drained little suddenly fills with bright red blood. What should the nurse do?
How are neuromuscular blocking drugs, such as vecuronium, safely stored?
A nurse teaches parents about firearm safety at home. Which statement shows a need for further teaching?
A nurse has given rapid-acting insulin, and then learns that the patient’s meal tray will be 45 minutes late. What should the nurse do?
Which nursing approach may raise intracranial pressure in a patient with a head injury?
When a patient returns to the ward from theatre, what should the nurse assess first?
A patient taking regular ibuprofen suddenly develops severe upper abdominal pain, a rigid abdomen and becomes tachycardic. What is most likely?
哪一组表现符合高钙血症?
A patient has eaten very little for 2 weeks and has received broad-spectrum antibiotics. The INR is now 2.3 without warfarin, and the platelets are normal. What is the most likely cause?
During a rapid infusion of vancomycin, a patient develops flushing and a red rash on the face, neck and upper body. What is the most likely cause and action?
A 19-year-old woman is starting isotretinoin for severe acne. Which requirement is most important?
哪项实验室检查用于调整普通肝素的输注?
A patient had 40 minutes of chest pain at rest. The ECG shows ST depression without ST elevation, and the troponin is rising. What is the diagnosis?
During continuous bladder irrigation, 3200 mL drains out in a shift. 2500 mL of irrigation fluid was put in. What is the true urine output?
一名 DKA 患者正在好转:血糖 9 mmol/L,酮体 0.4 mmol/L,pH 7.36。患者能进食和饮水。应如何停用静脉胰岛素?
In the UK National Early Warning Score (NEWS2), what does an aggregate score of 5 or more usually trigger?
Shortly after a spinal anaesthetic, a patient says their arms feel weak and it is hard to breathe, and the BP is falling. What is most likely?
A woman in preterm labour receives nifedipine. Which side effect should the nurse watch for?
A woman 2 hours after birth asks for help to the bathroom. She had an epidural that is now off. What is the main safety concern?
计划在置入静脉套管前使用局部麻醉乳膏(利多卡因–丙胺卡因)。什么很重要?
A child has had many hospital admissions with unexplained symptoms. They occur only when the mother is present and stop when the child is apart from her. What should the nurse consider?
In DSM-5-TR, prolonged grief disorder in adults requires that at least how long has passed since the death?
一名强迫症患者进行了很长的洗手仪式,错过了早餐。最佳的初始应对是什么?
练习题(虚构数值,不作为临床指导)。 一位患者身高 145 cm。按 1 in = 2.54 cm,求以英寸表示的身高h。取到一位小数。
练习题(虚构数值,不作为临床指导)。 一张处方写着口服混悬液1 tbsp,每 6 小时一次,共 14 天。按1 tbsp = 15 mL,整个疗程需要多少 mLV?
一名体重 21 kg 的儿童按 10 mg/kg 处方用药。原液浓度为 25 mg/mL。请抽取剂量:应给多少体积 V?
处方剂量为 1.08 mg。安瓿每 mL 含 2000 微克。请用 1 mL 注射器抽取剂量:应给多少体积 V?
滴注以 20 gtt/min 的速度通过滴系数为 15 gtt/mL 的输液器。患者在 3 小时内接受多少毫升 V?
一组输液以 28 滴/分的速度经 15 滴/mL 的输液器滴注。袋中还剩 600 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)。 一项练习规程要求为体重 84 kg 的患者推注肝素 80 units/kg。药瓶规格为 1 000 units/mL。应抽取多少体积 V? 保留一位小数。
练习题(虚构数值,不作为临床指导)。 一名体重 100 kg 的患者的医嘱为norepinephrine 10 mcg/min。输液袋中含 4 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 12 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)。 一份 500 mL 的输液于 14:30 开始以 75 mL/h 输注。2 小时后速率改为 100 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)。 用 Braden 量表评估一位练习患者:感觉知觉: 非常受限; 潮湿程度: 非常潮湿; 活动: 偶尔步行; 活动能力: 不受限制; 营养: 极好; 摩擦力和剪切力: 无明显问题。求 Braden 总分B。
练习题(虚构数值,不作为临床指导)。 用 Morse 跌倒评分评估一位练习患者:过去 3 个月内的跌倒史: 是; 次要诊断: 否; 行走辅助: 拐杖、手杖或助行器; 静脉输液或封管: 是; 步态: 受损; 精神状态: 了解自身局限。使用分界值 0–24 低,25–44 中度,45 或以上高,点击跌倒风险等级。
某练习血气显示 PaCO₂ 48 mmHg (6.4 kPa)。利用规则:在慢性呼吸性酸中毒中,PaCO₂ 每比 40 高出 10 mmHg,HCO₃⁻ 升高 3.5 mmol/L,以HCO₃⁻ 24 mmol/L 为起点,求预期HCO₃⁻。
练习数值:Na⁺ 137,Cl⁻ 93,HCO₃⁻ 18 mmol/L。使用 AG = Na⁺ − (Cl⁻ + HCO₃⁻) 计算 Δ 比值 (AG − 12)/(24 − HCO₃⁻)。保留两位小数。
解读这条 II 导联心律条带。这是什么节律?点击你的答案。
这条 II 导联心电图显示二度房室传导阻滞 I 型(文氏现象)。测量未下传 P 波之前最后一个下传搏动的 PR 间期(即最长的 PR),以秒为单位。
答案: D · Ease them gently to the floor while protecting their head
Trying to stop a fall can injure both the nurse and the patient. The nurse widens their stance, supports the patient and guides them down, protecting the head.
答案: B · Check the patient's vital signs and report it urgently
A sudden increase in fresh blood may mean active bleeding. The nurse assesses for signs of shock, such as a rising pulse and falling blood pressure, and escalates immediately.
答案: C · Separate from other drugs, with a warning that they cause paralysis
Neuromuscular blockers stop breathing. They are stored apart from other drugs, often in sealed or colored containers with warnings such as “Paralyzing agent: causes respiratory arrest”.
答案: A · “We keep the gun loaded in the nightstand, and the children know not to touch it.”
Firearms in homes with children should be stored unloaded and locked, with ammunition stored separately and locked. Telling children not to touch a gun does not reliably prevent injuries.
答案: B · Get the patient some carbohydrate food now and check the glucose
Rapid-acting insulin starts working within minutes, so a long delay before eating risks hypoglycemia. The nurse arranges food or carbohydrate now and monitors the glucose.
答案: D · Doing suctioning, turning and bathing all at the same time
Clustering several stimulating activities can cause a sustained rise in intracranial pressure. Spacing care, keeping the neck straight and a calm environment help keep it down.
答案: C · Airway, breathing, circulation and level of consciousness
Early postoperative assessment checks the airway, breathing, oxygen saturation, circulation, consciousness, pain, wound and drains. This detects anaesthetic and surgical complications early.
答案: C · A perforated peptic ulcer
Sudden severe pain with a board-like abdomen suggests perforation and peritonitis. The patient needs nil by mouth, IV access, analgesia and urgent surgical review.
答案: B · 便秘、疲劳、意识模糊和肾结石
高钙降低神经和肌肉的兴奋性,引起疲劳、便秘、意识模糊、骨痛和肾结石。手足搐搦和 Chvostek 征是低钙的征象。核对依据: Calcium Blood Test · MedlinePlus (NIH) (2024)
答案: B · Vitamin K deficiency
Vitamin K comes from the diet and from gut bacteria. Poor intake plus antibiotics can cause vitamin K deficiency, which lowers factors II, VII, IX and X and prolongs the PT/INR. Vitamin K replacement corrects it.核对依据: Vitamin K Deficiency in Neonates and Adults (StatPearls) · StatPearls (NCBI Bookshelf) (2026); Prothrombin time (PT) · MedlinePlus (NIH) (2025)
答案: D · An infusion reaction; stop or slow the infusion and inform the prescriber
Rapid vancomycin infusion releases histamine, causing flushing and itching of the upper body (formerly called "red man syndrome"). It is managed by stopping or slowing the infusion, and sometimes with an antihistamine.
答案: B · Reliable contraception and pregnancy tests, as it is highly teratogenic
Isotretinoin causes severe birth defects. Pregnancy prevention programmes require effective contraception and regular pregnancy tests before, during and after treatment.
答案: A · aPTT(或抗 Xa 水平)
静脉普通肝素的效应不稳定,应按处方方案根据 aPTT(或抗 Xa 水平)滴定。同时还应检查血小板计数,以发现肝素诱导的血小板减少症。D-二聚体用于帮助排除血栓形成,而不是监测治疗。
答案: C · Non-ST-elevation myocardial infarction
An NSTEMI is an acute coronary syndrome with myocardial necrosis (rising troponin) but no persistent ST elevation; ST depression or T wave inversion may be seen. It is treated with antiplatelets, anticoagulation and angiography based on risk, rather than emergency reperfusion.
答案: A · 700 mL
True urine output equals total drainage minus irrigation volume: 3200 − 2500 = 700 mL. If drainage is less than the irrigant volume, the catheter may be blocked and fluid is being retained.
答案: D · 随餐给予皮下胰岛素,重叠一段时间后停止静脉输注
静脉胰岛素的半衰期很短。在皮下胰岛素起效前停用会导致反跳性酮症。应给予皮下胰岛素,并将输注继续一段设定的重叠时间(随餐给予速效胰岛素后常为 30–60 分钟)。现代方案中,输注期间常继续使用基础胰岛素。
答案: C · An urgent review by a clinician skilled in acute illness
NEWS2 scores respiratory rate, SpO₂, oxygen use, BP, pulse, consciousness or new confusion, and temperature. A score of 5–6 needs an urgent response, and 7 or more an emergency response.
答案: C · A high spinal block
If local anaesthetic spreads upwards, it can affect the arms, breathing muscles and cardiac nerves, causing hypotension and bradycardia. It is an emergency; help is called, and breathing and circulation are supported.
答案: B · Low blood pressure and headache
Nifedipine relaxes smooth muscle in vessels as well as the uterus, causing hypotension, flushing, headache and reflex tachycardia. Absent reflexes suggest magnesium toxicity.
答案: D · Leg weakness or numbness causing a fall
After an epidural, the nurse checks that leg sensation and strength have returned before she stands. Combined with orthostatic hypotension and blood loss, this makes the first walk a high fall risk.
答案: D · 提前很久涂抹,通常约 60 分钟,并用封闭敷料覆盖
局部麻醉乳膏需要时间才能充分起效,通常约一小时,并用封闭敷料覆盖。应提前计划,让孩子受益。
答案: A · Fabricated or induced illness; follow safeguarding procedures
Fabricated or induced illness (formerly Munchausen syndrome by proxy) is a form of abuse in which a carer invents or causes illness. Careful objective documentation and early involvement of the safeguarding team are essential; the carer should not be confronted alone.
答案: C · 12 months
In adults, prolonged grief disorder requires at least 12 months since the loss (6 months for children and adolescents), with intense yearning or preoccupation that impairs functioning. ICD-11 uses a shorter minimum of 6 months.
答案: A · 给予仪式的时间,围绕它安排日程,并与患者一起逐步限制
仪式可减轻严重的焦虑。突然阻止会造成痛苦。护士应在日程中安排时间,支持暴露与反应预防等治疗,并帮助患者逐渐减少仪式。
答案: h = 57.1 in
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: V = 840 mL
量纲分析:先写出已知量,再乘以写成分数形式的换算系数(例如 60 min/1 h 或 1 mg/1000 mcg),使每个不需要的单位在分子和分母各出现一次并相互约去。只剩下所求单位时再计算。使用题目给出的等量关系,只对最终答案取整。
答案: V = 8.4 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 10 mL 的注射器上,每条小刻度线代表 0.2 mL。
答案: V = 0.54 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: V = 240 mL
Infusion rates: a pump is set in mL/h = volume/time in hours. A gravity drip is counted in drops per minute: gtt/min = volume (mL) × drop factor (gtt/mL)/time (min). The drop factor is printed on the tubing package: macrodrip sets deliver 10, 15 or 20 gtt/mL (blood sets often 10 gtt/mL in the US, 15 in the UK) and microdrip sets 60 gtt/mL. Always use the drop factor the question or package gives.
答案: t = 5.4 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: V = 6.7 mL
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 = 37.5 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: B = 710 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: t = 5.5 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 5 h 30 min,所以袋子大约在 20:00 输完。
答案: B = 18
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: 高风险
Morse 跌倒评分:六个条目。跌倒史:否 0 分,是 25 分。次要诊断:否 0 分,是 15 分。行走辅助:无、卧床休息或护士协助 0 分;拐杖、手杖或助行器 15 分;扶着家具 30 分。静脉输液或封管:否 0 分,是 20 分。步态:正常、卧床休息或轮椅 0 分;虚弱 10 分;受损 20 分。精神状态:了解自身局限 0 分;高估或忘记自身局限 15 分。总分为 0 至 125。各医院的风险分界值不同;常用的一套是 0–24 低风险,25–44 中度风险,45 及以上为高风险。
答案: HCO₃⁻ = 26.8 mmol/L
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: Δ 比值 = 2.333
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。
高于 2:合并代谢性碱中毒。
答案: 心房颤动
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: 最长的 PR = 0.3 s
房室传导阻滞:逐个标出 P 波,检查哪些 P 波后面跟着 QRS。一度:每个 P 波都下传,PR 恒定且大于 0.20 s。二度 I 型(Mobitz I,文氏现象):PR 逐搏延长,直到一个 P 波未下传,然后周期重新开始(成组搏动)。二度 II 型(Mobitz II):下传搏动的 PR 保持恒定,P 波突然不下传;QRS 常增宽。三度(完全性)阻滞:P 波和 QRS 波群各自规则但互相独立,PR 随机变化,心房率快于逸搏率(交界性逸搏 40–60 次/分,QRS 窄;室性逸搏 20–40 次/分,QRS 宽)。2:1 阻滞仅凭一份条带无法判断是 I 型还是 II 型。
PR 最大的增幅出现在一组的第一个和第二个搏动之间;之后的增幅较小,这就是暂停之前 R–R 间期缩短的原因。
本内容为独立练习材料。ExamProblems 与该考试的主办机构没有隶属关系,也未获其认可,考试名称仅用于描述内容。 NCLEX®, NCLEX-RN® and NCLEX-PN® 是 the National Council of State Boards of Nursing, Inc. (NCSBN) 的商标,该机构与 ExamProblems 无关,不为其背书,也不保证其准确性。
ExamProblems · examproblems.com/courses/nclex-rn-practice-questions