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 arrives back on the ward after surgery. What does the nurse assess first?
An older patient's leg wound has become more painful and has a new unpleasant smell, but there is no fever. What does this suggest?
A nurse has just given an intramuscular injection with a safety needle. What should the nurse do next with the needle?
A patient with dementia is often found at the exit doors trying to leave the unit. Which measure is most appropriate?
An older patient with dementia is restless at night and keeps trying to get out of bed. Which measure should the nurse try first?
The charge nurse overhears four instructions from an RN to a nursing assistant. Which one needs to be corrected?
A very anxious patient breathes rapidly for a long period. Which change is expected?
A hypotensive postoperative patient is given a fluid bolus. Which findings suggest a good response?
哪种治疗通过使钾进入细胞内来降低血清钾?
Ten days after chemotherapy, a patient has a platelet count of 9 × 10³/µL and reports a sudden severe headache and blurred vision. What is the priority?
哪种副作用是钙通道阻滞剂氨氯地平的典型副作用?
A malnourished patient with low serum albumin shows nystagmus and unsteady gait. Her total phenytoin level is within range. What is the most likely explanation?
Where is the V1 electrode placed for a 12-lead ECG?
一名心肌梗死恢复中的患者对恢复正常生活感到焦虑。哪项干预最能支持其康复?
A patient has had a calcium oxalate kidney stone. Which advice best helps prevent another?
一名患者的慢性低钠血症在 24 小时内从 115 纠正到 132 mmol/L。两天后他们出现言语含糊、吞咽困难和肢体无力。最可能的原因是什么?
Which early symptoms suggest local anaesthetic systemic toxicity?
During bowel preparation, an older patient becomes dizzy and confused. Blood tests show sodium 127 mmol/L. What should the nurse do?
在 30 周时,哪个宫高与预期的生长相符?
Which statement by a woman in early labour shows a need for further teaching about pain relief?
A 2-year-old suddenly began coughing while eating peanuts. He now has a wheeze on one side of the chest only. What is most likely?
A newborn becomes deeply cyanotic within hours of birth and does not improve with oxygen. A prostaglandin infusion is started. What is its purpose?
A man with few physical symptoms is convinced he has cancer, checks his body many times a day and is not reassured by normal test results. According to DSM-5, which disorder does this suggest?
A voluntary patient asks to leave the ward now. While talking, he says he plans to jump from a bridge on the way home. What should the nurse do?
练习题(虚构数值,不作为临床指导)。 一名新生儿体重 6 lb 14 oz。按 1 lb = 16 oz 和 1 kg = 2.2 lb,求以千克表示的体重m。取到两位小数。
练习题(虚构数值,不作为临床指导)。 一个班次中,患者摄入了1½ 杯 / 茶, 8 fl oz / 果汁, ½ tbsp / 液体营养补充剂。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 88 kg 的患者体表面积为 1.79 m²。医嘱为 135 mg/m²。求剂量 D,以 mg 表示。
处方为 3300 单位的药物,药液规格为 5000 单位/mL。请用 1 mL 注射器抽取剂量:应给多少体积 V?
滴注以 50 gtt/min 的速度通过滴系数为 60 gtt/mL 的输液器。患者在 12 小时内接受多少毫升 V?
200 mg 药物溶于 250 mL 的输液以 30 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)。 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 50 kg。求平均尿量 U,以 mL/kg/h 计。 保留两位小数。
练习题(虚构数值,不作为临床指导)。 一袋 1000 mL 的液体于 11:30 开始用输液泵以 150 mL/h 输注。到 16:30 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: 轻度受限; 潮湿程度: 偶尔潮湿; 活动: 偶尔步行; 活动能力: 轻度受限; 营养: 非常差; 摩擦力和剪切力: 潜在问题。求 Braden 总分B。
练习题(虚构数值,不作为临床指导)。 出生后 5 分钟,一名练习用新生儿的表现为:全身皮肤青紫或苍白,心率 60 次/分,刺激时做鬼脸,四肢松软,没有肌张力,无呼吸。 为 Apgar 评分并点击该评分的解读。
答案: A · Airway and breathing
After anaesthesia the airway and breathing are checked first, then circulation, consciousness, pain, the wound, drains and fluids.
答案: B · A possible wound infection that needs assessment and reporting
Increasing pain, odour, new exudate or delayed healing can signal infection even without fever, especially in older adults. The wound is assessed, the change reported and a swab taken if policy advises.
答案: B · Activate the safety device and drop it into a sharps container at once
Used needles are never recapped with two hands, bent or left lying around. The safety feature is activated straight away and the needle goes into a puncture-resistant sharps container at the point of use.
答案: B · Use an electronic wander alert, supervise closely and offer meaningful activity
Wander alert systems, close supervision, orientation and activity reduce the risk of elopement without restricting the patient. Seclusion, restraints and sedation used for convenience are not appropriate.
答案: C · Check for pain, thirst or a full bladder, and offer toileting
Patients with dementia may not be able to say what they need. Checking for pain, thirst or the need to void often relieves restlessness; restraints, full bed rails and sedation have risks and are not first choices.
答案: D · “Check his glucose and give the insulin according to the sliding scale.”
Giving insulin is medication administration and needs a licensed nurse. Measuring glucose, hygiene and supervised walking are suitable tasks with clear reporting instructions.
答案: B · Respiratory alkalosis from a low PaCO2
Hyperventilation blows off CO2, raising the pH. Symptoms can include tingling of the lips and fingers and lightheadedness.
答案: C · The heart rate falls, blood pressure rises and urine output improves
After a fluid challenge, a falling heart rate, rising blood pressure, better capillary refill, improving consciousness and urine output suggest fluid responsiveness. New crackles or breathlessness suggest fluid overload.
答案: D · 静脉注射普通胰岛素并配合葡萄糖
胰岛素激活钠–钾泵,使钾进入细胞内;同时给予葡萄糖以预防低血糖。葡萄糖酸钙保护心脏,但不降低钾水平。核对依据: High potassium level · MedlinePlus (NIH) (2025)
答案: C · Assess neurological status and report it at once as possible brain bleeding
Platelet counts usually reach their lowest point (nadir) about 7–14 days after chemotherapy. With a count below 10 × 10³/µL, a sudden severe headache or visual change may signal intracranial bleeding, which is an emergency. The nurse assesses neurological status and reports it immediately.核对依据: Bleeding and Bruising (Thrombocytopenia) and Cancer Treatment · National Cancer Institute (NIH) (2022); Pancytopenia · StatPearls (NCBI Bookshelf) (2023)
答案: B · 踝部水肿
二氢吡啶类钙通道阻滞剂扩张小动脉,使下肢毛细血管压力升高,引起踝部水肿。干咳是 ACE 抑制剂的典型副作用。
答案: B · More phenytoin is unbound when albumin is low, so free levels rise
Phenytoin is highly protein bound. When albumin is low, the free fraction rises, so toxicity can occur with a "normal" total level; a free phenytoin level or corrected level is more useful.
答案: A · The fourth intercostal space just right of the sternum
V1 is placed in the fourth intercostal space at the right sternal edge, and V2 at the left sternal edge. V4 is in the fifth intercostal space in the mid-clavicular line, and V6 in the mid-axillary line at the same level. Wrong placement can mimic or hide changes.
答案: C · 转介心脏康复
心脏康复结合了监督下的运动、危险因素教育、用药指导和心理支持。它可改善生活质量,降低心血管死亡率和再入院率。应根据建议鼓励患者逐步恢复活动,包括工作、驾驶和性生活。
答案: D · Drink plenty of fluid so the urine stays pale
High fluid intake is the most important measure for preventing stones. Dietary calcium is usually not restricted, because it binds oxalate in the gut. High-dose vitamin C can increase oxalate.
答案: B · 渗透性脱髓鞘综合征
慢性低钠血症的快速纠正会使脑细胞皱缩,并可损伤脑桥和其他区域的髓鞘。症状(构音障碍、吞咽困难、四肢轻瘫、“闭锁”状态)在数天后出现。这就是为什么要限制纠正速度并密切监测血钠。
答案: A · Tingling around the mouth, a metallic taste and tinnitus
High blood levels of local anaesthetic first cause CNS symptoms such as perioral tingling, metallic taste, tinnitus, light-headedness and confusion, then seizures and arrhythmias. The injection is stopped and help is called at once.
答案: B · Stop the preparation and escalate to the medical team
Bowel preparation can cause dehydration and electrolyte disturbance, including hyponatraemia, especially in older people. Confusion with low sodium needs prompt medical review, and further prep is withheld until assessed.
答案: D · 29 cm
30 周时预期宫高约为 28–32 cm。与孕周相差超过 2–3 cm 时应随访,通常做超声检查。
答案: A · "If I have an epidural, I will not need my blood pressure checked."
Epidurals often cause hypotension, so blood pressure is checked frequently after they are started. Movement, breathing techniques and warm water are effective non-drug measures.
答案: A · An inhaled foreign body
A sudden cough or choking episode while eating, followed by a one-sided wheeze or reduced breath sounds, strongly suggests foreign body aspiration. It needs urgent assessment and usually removal by bronchoscopy.
答案: B · To keep the ductus arteriosus open so that the two circulations can mix
In duct-dependent lesions such as transposition of the great arteries, the open ductus lets blood mix between the circulations until surgery. Prostaglandin E1 keeps the duct open; the baby is monitored for apnoea.
答案: B · Illness anxiety disorder
In illness anxiety disorder, the person is preoccupied with having or getting a serious illness, with no or only mild symptoms. In somatic symptom disorder, the distressing physical symptoms themselves are prominent. ICD-11 calls this condition hypochondriasis.
答案: B · Stay with him and inform the team at once, so he can be urgently assessed under mental health law
A voluntary patient who shows immediate serious risk may need urgent assessment under mental health legislation, which often includes short-term holding powers for nurses. The nurse acts quickly to keep him safe.
答案: m = 3.13 kg
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 = 607.5 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 = 241.7 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 = 0.66 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: V = 600 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: D = 400 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: U = 1.83 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。
答案: V = 250 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 = 15
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: 低
Apgar 评分:五项体征,每项评 0、1 或 2 分,在出生后 1 分钟和 5 分钟检查。外观(肤色):青紫或苍白 0 分,躯干粉红、四肢青紫 1 分,全身粉红 2 分。脉搏:无 0 分,低于 100 次/分 1 分,100 次/分或以上 2 分。反射(反射应激性):无 0 分,做鬼脸 1 分,哭叫、咳嗽或打喷嚏 2 分。肌张力(活动):松软 0 分,略有屈曲 1 分,活动活跃 2 分。呼吸:无 0 分,缓慢或不规则、哭声微弱 1 分,良好、哭声响亮 2 分。总分 7–10 为令人放心,4–6 为中度异常,0–3 为低。
5 分钟时低于 7 分,通常每 5 分钟重复评分一次,直至 20 分钟。
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