NCLEX-PN 风格练习题(LPN/LVN):速成包

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。

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1公式与方法

感染控制与患者安全

方法

  1. 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。
  2. 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)。
  3. 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。
  4. 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。
  5. 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。

优先排序与委派

方法

  1. 问自己:如果什么都不做,什么会最快伤害患者。
  2. 应用 ABC(心脏骤停时为 C-A-B),然后是 Maslow 需求层次:生理需要先于安全,安全先于心理需要。
  3. 比较各选项:急性先于慢性,不稳定先于稳定,意外先于预期,全身性先于局部,并将每项发现与患者的基线对照。
  4. 除非是紧急情况,否则先评估再行动;然后选择其他步骤所依赖的那一步。
  5. 委派时核对五项正确:任务、情境、人员、指示和监督。评估、宣教和评价仍由注册护士负责。

实验室检查值与电解质

方法

  1. 把数值与本实验室自己的参考范围比较,再与患者的基线和趋势比较。
  2. 检查标本:溶血、延迟,或在静脉输液附近采血都可能得出错误结果。
  3. 把数值与其典型体征以及引起它的药物和疾病联系起来。
  4. 注意相互作用:低钾或低镁会增加地高辛中毒的风险;脱水会使锂浓度升高。
  5. 对患者采取行动:评估,血药浓度不安全时暂停用药,复述危急值并通知开医嘱的医生。

内外科护理:心血管与呼吸

方法

  1. 说出问题所在:泵衰竭、动脉阻塞、节律、血栓、气道狭窄、感染或设备问题。
  2. 先检查危险征象:低氧、低血压、胸痛、新出现的意识模糊、冰冷无脉搏的肢体。
  3. 让氧疗与患者相匹配:大多数人为 94–98%,有 CO₂ 潴留风险者为 88–92%。
  4. 把每种药物与其检测和风险联系起来:华法林与 INR,肝素与 aPTT 和血小板,利尿剂与血钾。
  5. 选择安全的第一步措施,然后升级处理并重新评估。

内外科护理:神经、内分泌与肾脏

方法

  1. 对每位新出现意识模糊、乏力或癫痫发作的患者都检查血糖。
  2. 把意识水平作为脑部问题最早的警示;瞳孔变化和库欣三联征出现得较晚。
  3. 对于糖尿病急症,要区分 DKA(酮体、酸中毒)和 HHS(渗透压很高、脱水);先补液。
  4. 对于钠和水,要判断是 ADH 过多(SIADH)还是缺乏(尿崩症),并缓慢纠正慢性变化。
  5. 对于肾脏问题,把原因分为肾前性、肾性或肾后性,并监测血钾和液体。

内外科护理:消化、围手术期与肿瘤

方法

  1. 想一想可能隐藏着什么:内出血、无发热的感染、SpO₂ 正常背后的通气不足。
  2. 利用术后的时间来缩小并发症的范围:出血在数小时内,胸部问题在数天内,伤口和吻合口漏出现得更晚。
  3. 对于疼痛,要评估、用多模式镇痛治疗、重新评估,并且在每次使用阿片类药物时监测镇静程度。
  4. 对于癌症患者,把低谷期的任何疾病都当作中性粒细胞减少性脓毒症处理,并了解肿瘤急症。
  5. 对于烧伤,只计算浅二度/深二度和三度的面积,从烧伤的时刻开始计算 Parkland 时间,并根据尿量调整。

产科护理

方法

  1. 把产妇放在时间轴上定位:孕周、产程阶段或产后第几天,再判断此时什么是正常的。
  2. 找出处于危险中的对象:母亲、胎儿或新生儿,或者其中不止一个。
  3. 把发现与其原因联系起来:减速用 VEAL CHOP,出血用四个 T,产后用 BUBBLE-HE。
  4. 优先选择改善血流和氧合的措施(侧卧、停用缩宫素、宫底按摩),然后再升级处理。

儿科护理

方法

  1. 先记下患儿的年龄:它决定正常生命体征、发育里程碑和合适的疼痛量表。
  2. 评估气道、呼吸和循环,记住儿童代偿很久之后会迅速恶化。
  3. 让措施与发育阶段相匹配,并让家属参与。
  4. 检查答案对儿童是否安全:按体重计算,病毒感染不用阿司匹林,12 岁以下不用可待因。

精神科护理

方法

  1. 判断是否存在即时风险:自杀、暴力、药物急症或躯体疾病。
  2. 先保障安全:观察、移除危险物品、缓和局面、停用有害药物、寻求帮助。
  3. 选择治疗性回应:承认感受、陈述现实,避免虚假的安慰和“为什么”式提问。
  4. 尊重权利:采用限制最少的方案,知情同意,以及保密及其限度。

护理数学与单位换算

公制进位
1 kg = 1000 g, 1 g = 1000 mg, 1 mg = 1000 mcg, 1 L = 1000 mL
体重和长度
1 kg = 2.2 lb, 1 lb = 16 oz, 1 in = 2.54 cm, 1 ft = 12 in
家用计量
1 tsp = 5 mL, 1 tbsp = 15 mL, 1 fl oz = 30 mL, 1 cup = 8 fl oz = 240 mL
温度
°C = (°F − 32)·5/9, °F = °C·9/5 + 32
24 小时制
PM 1–11 点:加 12; 12 AM = 00:xx; 12 PM = 12:xx
给药速率
mcg/min × 60/1000 = mg/h
实验室换算系数
葡萄糖 1 mmol/L = 18 mg/dL; 肌酐 1 mg/dL = 88.4 µmol/L; Hb 1 g/dL = 10 g/L

方法

  1. 写出已知量及其单位,以及你想要的单位。
  2. 选定等量关系:kg、g、mg 和 mcg 之间,或 L 和 mL 之间为 1000;1 kg = 2.2 lb;1 tsp = 5 mL,1 tbsp = 15 mL,1 fl oz = 30 mL,1 cup = 240 mL。
  3. 写成分数,使不需要的单位相互约去;对于速率,每个变化的单位用一个分数。
  4. 检查方向:单位越小,数字越大。
  5. 只对最终答案取整,精度按题目所述。

剂量计算

由浓度计算剂量
体积 = 剂量 / 浓度
按体重给药
剂量 = mg/kg × 体重
片剂
片数 = 剂量 / 每片规格
单位
1 g = 1000 mg, 1 mg = 1000 mcg

方法

  1. 把医嘱剂量和药品规格换算为同一单位。
  2. 用“需要量除以现有量再乘以数量”:(D/H) × Q。
  3. 按体重给药时,先乘以以 kg 计的体重,再用日剂量除以给药次数。
  4. 先估算,再检查答案是否合理。

静脉输液速度

泵速
mL/h = volume (mL)/time (h)
滴速
drops/min = volume (mL) × drop factor / time (min)
输注时间
time (h) = volume (mL)/rate (mL/h)

方法

  1. 泵速 mL/h:体积除以以小时计的时间。
  2. 滴速 drops/min:体积 × 滴系数,再除以以分钟计的时间。
  3. 剩余时间:剩余体积除以速率。
  4. 按题目或设备的要求取整。

静脉输液与液体平衡

Holliday–Segar 每小时量
4 mL/kg(前 10 kg)+ 2 mL/kg(次 10 kg)+ 1 mL/kg(20 kg 以上每 kg)
Holliday–Segar 每日量
相同分段分别为 100 / 50 / 20 mL/kg
液体平衡
入量 − 出量
冰屑
按其体积的一半计算
尿量
mL/kg/h = mL / (kg × h)
输注时间
时间 (h) = 剩余体积 (mL) / 速率 (mL/h)
已输入体积
mL = 速率 × 时间

临床评估评分

格拉斯哥昏迷量表
GCS = E (1–4) + V (1–5) + M (1–6) = 3–15
Apgar
5 项体征 × 0–2 = 0–10; 7–10 令人放心, 4–6 中度异常, 0–3 低
Braden 量表
5 × (1–4) + 1 × (1–3) = 6–23; ≤ 18 有风险
Morse 跌倒评分
跌倒 25, 诊断 15, 辅助 15/30, 静脉输液 20, 步态 10/20, 精神状态 15
NEWS2 风险
0–4 低; 单项 3 分为中低; 5–6 中; ≥ 7 高
平均动脉压
MAP = (SBP + 2·DBP)/3 = DBP + PP/3
脉压和休克指数
PP = SBP − DBP, SI = HR/SBP
体质指数
BMI = kg/m² = 703·lb/in²

方法

  1. 找出题目使用的评分表及其范围(GCS 3–15,Apgar 0–10,Braden 6–23,Morse 0–125)。
  2. 分别为每个条目评分,将描述与其对应的等级匹配。
  3. 把各条目得分相加,并检查总分是否在范围内。
  4. 应用分界值:对于 NEWS2,还要查看是否有单项参数得 3 分。
  5. 对于导出的数值,使用 MAP = (SBP + 2·DBP)/3,PP = SBP − DBP,SI = HR/SBP,BMI = kg/m²。

2练习题

1.护理学基础中等

How should the ear be positioned when taking a tympanic temperature in an adult?

  1. AGently pull the outer ear down and back
  2. BPush the outer ear forward against the cheek
  3. CGently pull the outer ear up and back
  4. DLeave the ear alone and insert the probe deeply
2.护理学基础困难

At the start of a shift, which task should the nurse do first?

  1. AChange the bed linen of a patient who is going home
  2. BOrder supplies for the ward store room
  3. CUpdate the ward whiteboard with the names of all the new patients
  4. DGive the first IV antibiotic dose to a patient with suspected sepsis
3.感染控制与患者安全中等

Where should the drainage bag of an indwelling urinary catheter be kept?

  1. AOn the floor under the bed, where it is out of the way
  2. BOn the bed next to the patient’s hip
  3. CHung on the IV pole above the patient
  4. DBelow the level of the bladder and off the floor
4.感染控制与患者安全困难

In US nursing practice, which task should the RN not assign to an LPN/LVN?

  1. AThe initial admission assessment of a new patient with suspected sepsis
  2. BA dressing change on a healing surgical wound that has no signs of infection
  3. CReinforcing hand hygiene teaching that the RN has already given
  4. DGiving scheduled oral antibiotics to a stable patient
5.优先排序与委派中等

A child with fever and headache develops a purple rash that does not fade when pressed with a glass. What should the nurse do?

  1. AApply a soothing cream to the rash
  2. BTreat it as an emergency and escalate at once
  3. CGive acetaminophen (paracetamol) and reassess in four hours
  4. DAdvise the family to see their doctor next week
6.优先排序与委派困难

An 85-year-old resident becomes newly confused and is falling, but has no fever. Which cause should the nurse consider first?

  1. AAn infection, such as a urinary tract infection, presenting atypically
  2. BA sudden worsening of long-standing dementia that needs no tests
  3. CBoredom from not having enough activities
  4. DNormal aging that needs no assessment
7.临床护理中等

Which examination findings suggest a large pleural effusion on one side?

  1. AA hyper-resonant chest with the trachea pulled towards that side
  2. BWheeze heard over both lungs
  3. CDull percussion and reduced breath sounds over the lung base
  4. DNormal breath sounds and normal percussion
8.临床护理困难

Which action is most important in protecting a patient with severe neutropenia from infection?

  1. AGiving routine intramuscular injections
  2. BTaking rectal temperatures regularly
  3. CStrict hand hygiene by everyone who has contact with the patient
  4. DKeeping fresh flowers and plants in the room to help the patient's mood
9.实验室检查值与电解质中等

When should the nurse check the glucose before giving a mealtime dose of rapid-acting insulin (such as lispro)?

  1. AJust before the meal, giving insulin when the food is ready
  2. BTwo hours after the meal, then giving the insulin dose
  3. COnly once a day, then giving the same dose before every meal
  4. DAt bedtime only, then giving the mealtime insulin overnight
10.实验室检查值与电解质困难

A patient in DKA is receiving IV fluids and insulin. The glucose has fallen to about 220 mg/dL (12.2 mmol/L), but the anion gap is still high. What change would the nurse expect?

  1. AAdd dextrose to the IV fluids and continue the insulin
  2. BStop the insulin infusion because the glucose is near normal
  3. CGive an IV bolus of sodium bicarbonate at once
  4. DStop the IV fluids and start oral fluids only
11.药理学中等

When should a patient take a once-daily proton pump inhibitor such as omeprazole?

  1. AAbout 30–60 minutes before the first meal of the day
  2. BWith a glass of milk at bedtime, when acid output is highest
  3. CStraight after a large evening meal
  4. DOnly when heartburn is severe
12.药理学困难

某药分布容积为 40 L,生物利用度为 100%。要达到 2 mg/L 的目标血浆浓度,负荷剂量应为多少?

  1. A80 mg
  2. B160 mg
  3. C42 mg
  4. D20 mg
13.内外科护理:心血管与呼吸中等

A patient with chest pain has a first troponin result within the normal range one hour after the pain started. Why is a repeat test arranged?

  1. AThe repeat test is only needed for patients over 80
  2. BTroponin may take a few hours to rise after muscle damage
  3. CTroponin falls during an MI, so a lower value confirms it
  4. DThe first sample is always contaminated
14.内外科护理:心血管与呼吸困难

一名哮喘患者的峰流速为其最佳值的 40%,呼吸频率 28 次/分,不能说完整句子。SpO₂ 94%。该次发作应如何分级?

  1. A濒死性哮喘
  2. B危及生命的哮喘
  3. C急性重度哮喘
  4. D中度哮喘加重
15.内外科护理:神经、内分泌与肾脏中等

A bladder scan straight after voiding shows 450 mL of urine still in the bladder. What does this show?

  1. AThe bladder is not emptying properly
  2. BThe patient has drunk too little fluid
  3. CThe patient is passing urine normally
  4. DThe kidneys are making too little urine
16.内外科护理:神经、内分泌与肾脏困难

一名患者昨天刚建立左臂动静脉内瘘,需要做常规抽血。最重要的指示是什么?

  1. A从内瘘抽血,因为它容易找到且粗大
  2. B在左臂上用紧的止血带寻找好的静脉
  3. C用绷带紧紧包住左臂以保护内瘘
  4. D使用右臂;检查左手的循环和震颤
17.内外科护理:消化、围手术期与肿瘤中等

Which advice helps a patient with haemorrhoids?

  1. AEat less fibre so that stools are smaller
  2. BEat more fibre, drink enough fluid and avoid straining
  3. CTake a codeine-based painkiller every day
  4. DSit on the toilet for long periods to empty fully
18.内外科护理:消化、围手术期与肿瘤困难

全身麻醉期间,一名患者出现下颌强直、呼气末 CO₂ 升高和心动过速,随后体温迅速上升。哪种药物是特异性治疗?

  1. A丹曲林
  2. B纳洛酮
  3. C对乙酰氨基酚
  4. D琥珀酰胆碱
19.产科护理中等

A woman with pre-eclampsia is on magnesium sulfate. Why does the nurse monitor her urine output closely?

  1. AMagnesium causes a large diuresis that leads to dehydration
  2. BUrine output tells the nurse exactly when to stop the infusion after the birth
  3. CLow urine output shows that the magnesium is working
  4. DMagnesium is cleared by the kidneys, so oliguria raises the risk of toxicity
20.产科护理困难

A deceleration lasts 3 minutes before the baseline recovers. How is this classified?

  1. AAn early deceleration
  2. BA change of baseline
  3. CA prolonged deceleration
  4. DA variable acceleration
21.儿科护理中等

A child has scabies. Which plan is correct?

  1. AStop treatment as soon as the itch improves on the first day
  2. BTreat only the child, as family members without itching are not infected
  3. CTreat only the itchy areas of skin, not the whole body
  4. DTreat the child and all close contacts at the same time, and wash bedding and clothes
22.儿科护理困难

一名法洛四联症的幼儿剧烈哭闹,随后出现严重发绀并变得软弱无力。护士应首先做什么?

  1. A将孩子置于膝胸卧位,保持其平静并呼叫援助
  2. B测量头围
  3. C让孩子平躺并抬高双腿,以增加回心血量
  4. D带孩子散步使其平静下来
23.精神科护理中等

How does conduct disorder differ from oppositional defiant disorder?

  1. AConduct disorder involves only arguing with adults and losing one's temper
  2. BThe two disorders are exactly the same and differ only in the age at which they are diagnosed
  3. CConduct disorder involves violating others' rights, such as cruelty, theft or fire setting
  4. DOppositional defiant disorder includes serious physical aggression towards animals
24.精神科护理困难

Three weeks after her husband died, a woman says she sometimes briefly hears him call her name at home. She is otherwise eating, sleeping and coping. How should the nurse interpret this?

  1. AIt means she has delirium and needs urgent tests
  2. BIt proves she has severe major depression with psychosis
  3. CIt is a sign of schizophrenia that needs antipsychotic medicine
  4. DBrief experiences like this can be part of normal grief
25.护理数学与单位换算中等
94969810010210410635363738394041°F°C103.5 °F? °C

练习题(虚构数值,不作为临床指导)。 一位患者的体温为 103.5 °F。用 °C = (°F − 32) × 5/9 把它换算为摄氏度T。取到一位小数。

103.5 °F
T = °C
26.护理数学与单位换算困难
00:0017:4004:25t = ?

练习题(虚构数值,不作为临床指导)。 一次输注从 17:40 开始,到次日早晨 04:25 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。

17:4004:25
t = h
27.剂量计算中等
1:10 000安瓿V = ? mL

一支肾上腺素预充式注射器标示为 1:10 000(0.1 mg/mL)。医嘱为心脏骤停时 1 mg 静脉注射(IV)。你应给多少体积 V?

1:10 0001 mg
V = mL
28.剂量计算困难
00.10.20.30.40.50.60.70.80.911 mL

处方剂量为 0.52 mg。安瓿每 mL 含 4000 微克。请用 1 mL 注射器抽取剂量:应给多少体积 V?

0.52 mg4000 mcg/mL
V = mL
29.静脉输液速度中等
1000 mL20 gtt/mL5 h? gtt/min

用滴系数为 20 滴/mL 的输液器在 5 小时内输入 1000 mL。求滴速 R(滴/分)。 取整到最接近的整数。

1000 mL5 h20 gtt/mL
R = gtt/min
30.静脉输液速度困难
500 mg100 mL25 mL/h? mg/h

一袋液体在 100 mL 中含药 500 mg,以 25 mL/h 的速度输注。患者每小时获得多少毫克 D?

500 mg/100 mL25 mL/h
D = mg/h
31.静脉输液与液体平衡中等
入量出量12 小时班次水150 mL果冻120 mL汤200 mL冰屑120 mL静脉输液80 mL/h × 12 h静脉抗生素2 × 50 mL尿液425 mL尿液225 mL尿液175 mL尿液300 mL伤口引流150 mL呕吐物200 mL

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。患者体重 72 kg。求平均尿量 U,以 mL/kg/h 计。 保留两位小数。

72 kg12 h尿液: 425 mL尿液: 225 mL尿液: 175 mL尿液: 300 mL伤口引流: 150 mL呕吐物: 200 mL
U = mL/kg/h
32.静脉输液与液体平衡困难
1000 mL350 mL 已输入120 mL/h06:30t = ? h

练习题(虚构数值,不作为临床指导)。 一袋 1000 mL 的液体用输液泵以 120 mL/h 输注。到 06:30 时已输入 350 mL。还要多少小时 t 袋子才会输完? 保留一位小数。

1000 mL350 mL 已输入120 mL/h
t = h
33.临床评估评分中等
12072SBPDBPmmHgHR 146/min · SI = ?

练习题(虚构数值,不作为临床指导)。 一位患者的脉搏为 146 次/分,血压为 120/72 mmHg。求休克指数SI = HR/SBP。取到两位小数。

HR 146/minBP 120/72 mmHg
SI =
34.临床评估评分困难
低风险中度风险高风险

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: 否; 次要诊断: 是; 行走辅助: 扶着家具; 静脉输液或封管: 否; 步态: 虚弱; 精神状态: 高估或忘记自身局限。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。

  1. 1低风险
  2. 2中度风险
  3. 3高风险

3溶液

1.护理学基础

答案: C · Gently pull the outer ear up and back

为什么是这个答案

Pulling the pinna up and back straightens the adult ear canal so the probe points at the eardrum. In young children the pinna is pulled down and back instead.

答案

C · Gently pull the outer ear up and back
2.护理学基础

答案: D · Give the first IV antibiotic dose to a patient with suspected sepsis

为什么是这个答案

In sepsis antibiotics are time-critical, and every hour of delay increases the risk of death. Routine tasks are done afterwards.

答案

D · Give the first IV antibiotic dose to a patient with suspected sepsis
3.感染控制与患者安全

答案: D · Below the level of the bladder and off the floor

为什么是这个答案

Keeping the bag below the bladder prevents backflow of urine into the bladder, and keeping it off the floor prevents contamination. Both reduce the risk of catheter-associated urinary tract infection.

答案

D · Below the level of the bladder and off the floor
4.感染控制与患者安全

答案: A · The initial admission assessment of a new patient with suspected sepsis

为什么是这个答案

The initial assessment of a new, potentially unstable patient is an RN responsibility. LPNs/LVNs can give routine medications, perform routine procedures and reinforce teaching for stable patients.

答案

A · The initial admission assessment of a new patient with suspected sepsis
5.优先排序与委派

答案: B · Treat it as an emergency and escalate at once

为什么是这个答案

A non-blanching rash with fever can be a sign of meningococcal septicemia, which can progress within hours. Urgent escalation for antibiotics and supportive care is needed.

答案

B · Treat it as an emergency and escalate at once
6.优先排序与委派

答案: A · An infection, such as a urinary tract infection, presenting atypically

为什么是这个答案

Older adults often present with confusion or falls rather than fever when they have an infection. New confusion is a change that needs assessment for causes such as infection, dehydration or medication.

答案

A · An infection, such as a urinary tract infection, presenting atypically
7.临床护理

答案: C · Dull percussion and reduced breath sounds over the lung base

为什么是这个答案

Fluid in the pleural space muffles breath sounds and makes percussion stony dull. A large effusion may push the trachea away from the affected side.

答案

C · Dull percussion and reduced breath sounds over the lung base
8.临床护理

答案: C · Strict hand hygiene by everyone who has contact with the patient

为什么是这个答案

Hand hygiene is the single most effective measure to protect neutropenic patients. Rectal procedures and IM injections are avoided because they can cause mucosal or tissue injury and bleeding.

答案

C · Strict hand hygiene by everyone who has contact with the patient
9.实验室检查值与电解质

答案: A · Just before the meal, giving insulin when the food is ready

为什么是这个答案

Rapid-acting insulin starts working within about 15 minutes, so glucose is checked before the meal and the insulin is given when the meal is available, usually within 15 minutes of eating. Giving it without food can cause hypoglycemia.

答案

A · Just before the meal, giving insulin when the food is ready
10.实验室检查值与电解质

答案: A · Add dextrose to the IV fluids and continue the insulin

为什么是这个答案

The glucose usually falls before the ketoacidosis resolves. Dextrose is added so insulin can continue, clearing ketones without causing hypoglycemia, until the anion gap closes. Stopping insulin too early lets ketoacidosis return.

答案

A · Add dextrose to the IV fluids and continue the insulin
11.药理学

答案: A · About 30–60 minutes before the first meal of the day

为什么是这个答案

Proton pump inhibitors block pumps that are active, so they work best when taken before breakfast. Food then activates the pumps when the drug level is high.

答案

A · About 30–60 minutes before the first meal of the day
12.药理学

答案: A · 80 mg

为什么是这个答案

负荷剂量 = 40 L × 2 mg/L = 80 mg。负荷剂量取决于 Vd,而维持剂量取决于清除率。

答案

A · 80 mg
13.内外科护理:心血管与呼吸

答案: B · Troponin may take a few hours to rise after muscle damage

为什么是这个答案

Troponin starts to rise within hours of myocardial injury, so a very early result can be normal. Protocols use serial measurements at set intervals, with the ECG and clinical picture, to diagnose or exclude MI. A rising pattern supports acute injury.

答案

B · Troponin may take a few hours to rise after muscle damage
14.内外科护理:心血管与呼吸

答案: C · 急性重度哮喘

为什么是这个答案

在常用指南(如 BTS/SIGN)中,峰流速为最佳值的 33–50%、呼吸频率 25 次/分或以上、心率 110 次/分或以上,或不能说完整句子,提示急性重度哮喘。危及生命的特征包括峰流速低于 33%、SpO₂ 低于 92%、“沉默肺”、发绀、衰竭或意识混乱;濒死性哮喘是指 PaCO₂ 升高或需要通气。

答案

C · 急性重度哮喘
15.内外科护理:神经、内分泌与肾脏

答案: A · The bladder is not emptying properly

为什么是这个答案

A large post-void residual means incomplete emptying, for example from obstruction or a weak detrusor. It raises the risk of infection and overflow incontinence and may need intermittent catheterisation or treatment of the cause.

答案

A · The bladder is not emptying properly
16.内外科护理:神经、内分泌与肾脏

答案: D · 使用右臂;检查左手的循环和震颤

为什么是这个答案

新内瘘应避免受压和穿刺。护士检查震颤和血管杂音,并检查手部的温度、颜色和感觉,因为内瘘可能“盗取”手部的血液。内瘘通常需要数周成熟后才能用于透析。

答案

D · 使用右臂;检查左手的循环和震颤
17.内外科护理:消化、围手术期与肿瘤

答案: B · Eat more fibre, drink enough fluid and avoid straining

为什么是这个答案

Soft stools reduce straining and pressure on the anal cushions. Long sitting on the toilet and constipating drugs such as codeine should be avoided.

答案

B · Eat more fibre, drink enough fluid and avoid straining
18.内外科护理:消化、围手术期与肿瘤

答案: A · 丹曲林

为什么是这个答案

恶性高热的治疗包括停用触发药物、用 100% 氧气过度通气、静脉给予丹曲林(减少肌质网钙释放)、主动降温,以及治疗高钾血症和心律失常。琥珀酰胆碱是触发因素。

答案

A · 丹曲林
19.产科护理

答案: D · Magnesium is cleared by the kidneys, so oliguria raises the risk of toxicity

为什么是这个答案

Magnesium is cleared by the kidneys, so oliguria, which is common in pre-eclampsia, allows levels to rise. The nurse also monitors reflexes, respiratory rate and level of consciousness.

答案

D · Magnesium is cleared by the kidneys, so oliguria raises the risk of toxicity
20.产科护理

答案: C · A prolonged deceleration

为什么是这个答案

A prolonged deceleration lasts at least 2 minutes but less than 10. A decrease of 10 minutes or more is a baseline change. The cause, such as hypotension or tachysystole, should be found and corrected.

答案

C · A prolonged deceleration
21.儿科护理

答案: D · Treat the child and all close contacts at the same time, and wash bedding and clothes

为什么是这个答案

All household and close contacts are treated at the same time, even without symptoms, because itching can take weeks to develop. The cream or lotion is applied to the whole body as directed, and itching may persist for a few weeks after successful treatment.

答案

D · Treat the child and all close contacts at the same time, and wash bedding and clothes
22.儿科护理

答案: A · 将孩子置于膝胸卧位,保持其平静并呼叫援助

为什么是这个答案

在缺氧发绀发作(“法洛”发作)时,膝胸卧位可增加体循环阻力和肺血流。安抚孩子,给氧并紧急呼叫援助;可能医嘱使用吗啡等药物。

答案

A · 将孩子置于膝胸卧位,保持其平静并呼叫援助
23.精神科护理

答案: C · Conduct disorder involves violating others' rights, such as cruelty, theft or fire setting

为什么是这个答案

Oppositional defiant disorder involves angry, argumentative and defiant behaviour. Conduct disorder is more serious, with aggression, destruction of property, deceit, theft or serious violation of rules.

答案

C · Conduct disorder involves violating others' rights, such as cruelty, theft or fire setting
24.精神科护理

答案: D · Brief experiences like this can be part of normal grief

为什么是这个答案

Briefly hearing or sensing the deceased is common in bereavement and is not usually a sign of mental illness. The nurse listens, normalises the experience and watches for signs of more complicated grief or depression.

答案

D · Brief experiences like this can be part of normal grief
25.护理数学与单位换算

答案: T = 39.7 °C

温度:°C = (°F − 32) × 5/9,°F = °C × 9/5 + 32。从 °F 换算时先减 32 再乘,从 °C 换算时先乘再加 32。快速核对:37 °C 为 98.6 °F,每 1 °C 相当于 1.8 °F。

减去 32

103.5 − 32 = 71.5

乘以 5/9

T = 71.5·5/9 = 39.72 ≈ 39.7 °C

答案

T = 39.7 °C
26.护理数学与单位换算

答案: t = 10.75 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。

午夜之前

17:40 → 24:00 = 380 min

午夜之后

00:00 → 04:25 = 265 min

合计

380 + 265 = 645 min
t = 645/60 = 10.75 h

答案

t = 10.75 h
27.剂量计算

答案: V = 10 mL

Solution strengths: a percentage strength is grams per 100 mL, so 1% = 1 g/100 mL = 10 mg/mL. A ratio strength 1:1000 means 1 g in 1000 mL = 1 mg/mL; 1:10 000 is 0.1 mg/mL. For a dilution the amount of drug stays the same: C₁·V₁ = C₂·V₂.

浓度

1:10 000 = 1 g/10000 mL = 0.1 mg/mL

体积

V = 1/0.1 = 10 mL

答案

V = 10 mL

美国的标签现在标示 mg/mL(1 mg/mL = 1:1000;0.1 mg/mL = 1:10 000)。切勿静脉推注 1 mg/mL 的肾上腺素。

28.剂量计算

答案: V = 0.13 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。

单位相同

0.52 mg = 520 mcg

体积

V = 520/4000 = 0.13 mL

答案

V = 0.13 mL
29.静脉输液速度

答案: R = 67 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。

以分钟计的时间

5·60 = 300 min

滴速

R = 1000·20/300 = 66.67 ≈ 67 gtt/min

答案

R = 67 gtt/min

床旁取最接近的整滴:67 滴/分。

30.静脉输液速度

答案: D = 125 mg/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。

浓度

500/100 = 5 mg/mL

给药速率

D = 5·25 = 125 mg/h

答案

D = 125 mg/h
31.静脉输液与液体平衡

答案: U = 1.3 mL/kg/h

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。

总尿量

425 + 225 + 175 + 300 = 1125 mL

每千克每小时

U = 1125/(72·12) = 1.302 ≈ 1.3 mL/kg/h

答案

U = 1.3 mL/kg/h
32.静脉输液与液体平衡

答案: t = 5.4 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。

剩余体积

1000 − 350 = 650 mL

时间

t = 650/120 = 5.417 ≈ 5.4 h

答案

t = 5.4 h

约为 5 h 25 min,所以袋子大约在 11:55 输完。

33.临床评估评分

答案: SI = 1.22

血压数值:脉压 PP = SBP − DBP。平均动脉压 MAP ≈ (SBP + 2·DBP)/3 = DBP + PP/3,这是基于正常心率下心脏每搏约有三分之二时间处于舒张期的估算(心率快时准确性下降);MAP 至少约 65 mmHg 是常用的器官灌注目标。休克指数 SI = 心率/SBP,正常约为 0.5–0.7;高于约 1 是休克的警示信号。

休克指数

SI = 146/120 = 1.217 ≈ 1.22

答案

SI = 1.22

1 或更高:在这个练习病例中是休克的警示信号。

34.临床评估评分

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。

为每个条目评分

过去 3 个月内的跌倒史: 否 → 0
次要诊断: 是 → 15
行走辅助: 扶着家具 → 30
静脉输液或封管: 否 → 0
步态: 虚弱 → 10
精神状态: 高估或忘记自身局限 → 15

相加

Morse 总分 = 0 + 15 + 30 + 0 + 10 + 15 = 70

风险等级

70 → 高风险

答案

高风险

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