Keep sterile items sterile: if in doubt, it is not sterile; replace, never wipe.
Prevent harm in the environment: fall measures, restraints only as a last resort, RACE and PASS for fire.
Check the rights of medication administration, two identifiers and extra safeguards for high-alert drugs; report errors and near misses.
Prioritization & delegation
Method
Ask what will harm the patient soonest if nothing is done.
Apply ABC (C-A-B in cardiac arrest), then Maslow: physiological needs before safety, safety before psychological needs.
Compare the options: acute before chronic, unstable before stable, unexpected before expected, systemic before local, and check each finding against the patient’s baseline.
Assess before you act unless it is an emergency; then choose the step the others depend on.
For delegation, check the five rights: task, circumstance, person, directions and supervision. Assessment, teaching and evaluation stay with the RN.
Lab values & electrolytes
Method
Compare the value with the laboratory’s own reference range, then with the patient’s baseline and trend.
Check the sample: hemolysis, a delay, or blood drawn near an IV can give false results.
Link the value to its typical signs and to the drugs and conditions that cause it.
Look for interactions: low potassium or magnesium increases digoxin toxicity; dehydration raises lithium.
Act on the patient: assess, hold a drug if the level is unsafe, read back critical values and inform the prescriber.
Med-surg: cardiovascular & respiratory
Method
Name the problem: pump failure, blocked artery, rhythm, clot, airway narrowing, infection or a device problem.
Check the danger signs first: hypoxia, hypotension, chest pain, new confusion, a cold pulseless limb.
Match the oxygen to the patient: 94–98% for most, 88–92% for those at risk of CO₂ retention.
Link each drug to its test and its risk: warfarin and INR, heparin and aPTT and platelets, diuretics and potassium.
Choose the safe first action, then escalate and reassess.
Med-surg: neuro, endocrine & renal
Method
Check the glucose in every patient with new confusion, weakness or a seizure.
Use the level of consciousness as the earliest warning of brain trouble; pupils and Cushing’s triad come late.
For diabetes emergencies, separate DKA (ketones, acidosis) from HHS (very high osmolality, dehydration); give fluids first.
For sodium and water, decide whether ADH is in excess (SIADH) or missing (DI), and correct chronic changes slowly.
For kidney problems, sort the cause into pre-renal, intrinsic or post-renal, and watch potassium and fluid.
Med-surg: GI, perioperative & oncology
Method
Ask what could be hidden: internal bleeding, infection without fever, hypoventilation behind a normal SpO₂.
Use the timing after surgery to narrow the complications: bleeding in hours, chest problems in days, wound and leak problems later.
For pain, assess, treat with multimodal analgesia, reassess, and monitor sedation with every opioid.
For cancer patients, treat any illness during the nadir as neutropenic sepsis and know the oncological emergencies.
For burns, count only partial- and full-thickness areas, start the Parkland clock at the time of the burn and titrate to urine output.
Maternity & obstetric nursing
Method
Place the woman in time: weeks of pregnancy, stage of labour or day after birth, and decide what is normal at that point.
Look for the patient in danger: the mother, the fetus or the newborn, or more than one of them.
Link the finding to its cause: VEAL CHOP for decelerations, the four Ts for bleeding, BUBBLE-HE after birth.
Choose the action that improves blood flow and oxygen first (side-lying, stopping oxytocin, fundal massage), then escalate.
Pediatric nursing
Method
Note the child’s age first: it sets the normal vital signs, the milestones and the right pain scale.
Assess airway, breathing and circulation, remembering that children compensate and then deteriorate fast.
Match the action to the development stage and involve the family.
Check that the answer is safe for a child: weight-based, no aspirin in viral illness, no codeine under 12.
Mental health nursing
Method
Decide whether there is an immediate risk: suicide, violence, a drug emergency or a physical illness.
Act on safety first: observe, remove means, de-escalate, stop a harmful drug, get help.
Choose the therapeutic response: acknowledge feelings, present reality, avoid false reassurance and “why” questions.
Respect rights: the least restrictive option, consent and confidentiality with its limits.
Nursing math & unit conversions
Metric steps
1 kg = 1000 g, 1 g = 1000 mg, 1 mg = 1000 mcg, 1 L = 1000 mL
Weight and length
1 kg = 2.2 lb, 1 lb = 16 oz, 1 in = 2.54 cm, 1 ft = 12 in
Household measures
1 tsp = 5 mL, 1 tbsp = 15 mL, 1 fl oz = 30 mL, 1 cup = 8 fl oz = 240 mL
falls 25, diagnosis 15, aid 15/30, IV 20, gait 10/20, mental status 15
NEWS2 risk
0–4 low; single 3 low–medium; 5–6 medium; ≥ 7 high
Mean arterial pressure
MAP = (SBP + 2·DBP)/3 = DBP + PP/3
Pulse pressure and shock index
PP = SBP − DBP, SI = HR/SBP
Body mass index
BMI = kg/m² = 703·lb/in²
Method
Find the score sheet that the question uses and its range (GCS 3–15, APGAR 0–10, Braden 6–23, Morse 0–125).
Score every item separately, matching the description to its level.
Add the item scores and check that the total lies inside the range.
Apply the cut-offs: for NEWS2 also look for any single parameter scoring 3.
For derived values use MAP = (SBP + 2·DBP)/3, PP = SBP − DBP, SI = HR/SBP and BMI = kg/m².
2Practice problems
1.Nursing fundamentalsMedium
Which behaviour shows active listening?
APlanning your reply while the patient is talking
BLooking at the computer screen to take notes during the conversation
CParaphrasing what the patient said to check understanding
DChanging the subject when emotions come up
2.Nursing fundamentalsHard
A patient wants to keep taking St John's wort, a herbal remedy, while in hospital. Why should the nurse tell the prescriber?
AIt must be swapped for a prescribed antidepressant at once
BIt has no effects, so it is a waste of time
CIt interacts with many medicines and can reduce their effect
DHerbal remedies are always banned in hospital
3.Infection control & patient safetyMedium
Why is “QD” (once daily) on The Joint Commission’s “Do Not Use” list?
AIt is only allowed for intravenous medicines
BIt means “every day at bedtime” in some hospitals
CIt is a Latin abbreviation, and only plain English abbreviations may be used
DIt can be misread as QID or QOD, so the drug is given too often or too rarely
4.Infection control & patient safetyHard
During a power cut in a US hospital, a ventilator must stay powered. Where should it be plugged in?
AInto an extension cord from the corridor
BInto a red outlet connected to the emergency generator
CInto the outlet that is closest to the bed, whatever its color
DInto any white outlet in the room
5.Prioritization & delegationMedium
Which patient is at the highest risk of falling?
AA 30-year-old after an appendectomy who walks with steady steps
BAn 84-year-old taking a diuretic who has fallen before and gets up at night
CA 60-year-old admitted for chest pain that has since been ruled out by tests
DA 45-year-old with asthma who is alert and independent
6.Prioritization & delegationHard
A marathon runner is confused, with a temperature of 41 °C and hot skin. What is the priority?
AWrapping the runner in a blanket to prevent shivering
BGiving an antipyretic tablet and waiting for it to work
CRapid cooling while supporting airway and circulation
DAsking the runner to rest in the shade and drink slowly
7.Clinical nursingMedium
In suspected sepsis, what should ideally be collected before the first dose of antibiotics, as long as it does not delay treatment?
AA stool sample for occult blood
BBlood cultures
CA 24-hour urine collection
DA fasting cholesterol level
8.Clinical nursingHard
A patient is taught to self-inject low-molecular-weight heparin. Which statement shows a need for further teaching?
A"I will rub the area firmly after the injection."
B"I will inject into the fatty tissue of my abdomen."
C"I will report any unusual bleeding or bruising."
D"I will change the injection site each time."
9.Lab values & electrolytesMedium
A patient with suspected pulmonary TB needs sputum samples for acid-fast bacilli. Which instruction is correct?
AGive several samples of nasal mucus blown into a tissue
BGive one sample after brushing with mouthwash so it is clean
CGive several deep-cough samples, often first thing in the morning
DGive one sample of saliva collected from the mouth at any time of day
10.Lab values & electrolytesHard
A patient on warfarin with an INR of 3.6 fell and hit their head an hour ago. They now report a worsening headache and drowsiness. What is the priority?
AGive acetaminophen (paracetamol) and recheck the INR tomorrow
BReport urgently for imaging and possible reversal
CHold warfarin for one dose and observe at home
DEncourage rest in a dark room to settle the pain
11.PharmacologyMedium
How does sucralfate help a peptic ulcer heal?
AIt neutralises acid by releasing bicarbonate
BIt kills Helicobacter pylori directly
CIt blocks histamine H2 receptors in the stomach
DIt forms a protective coating over the ulcer base
12.PharmacologyHard
A patient who has had several courses of bleomycin develops a dry cough and worsening breathlessness. What should the nurse suspect?
AAsthma caused by anxiety
BA normal effect that will pass in a day
CPulmonary fibrosis from bleomycin
DHeart failure from bleomycin
13.Med-surg: cardiovascular & respiratoryMedium
Why should a beta-blocker not be stopped suddenly in a patient with ischaemic heart disease?
BThe drug stays stored in the tissues for several months afterwards
CRebound tachycardia and hypertension can trigger angina or MI
DSudden stopping causes severe and prolonged hypoglycaemia
14.Med-surg: cardiovascular & respiratoryHard
A 74-year-old man with a known abdominal aortic aneurysm suddenly has severe back and abdominal pain. His heart rate is 128/min and BP 82/50 mmHg. What is the priority?
AEncourage him to walk to ease the back pain
BGive oral analgesia and reassess the pain in an hour
CArrange a routine outpatient ultrasound scan of the aneurysm
DCall for emergency help and prepare for urgent vascular surgery
15.Med-surg: neuro, endocrine & renalMedium
Why should antiepileptic drugs not be stopped suddenly?
ASudden withdrawal can trigger seizures, including status epilepticus
BThe drugs build up in the body and become toxic after stopping
CStopping them suddenly causes permanent damage to the liver and kidneys
DStopping them suddenly causes a dangerous rise in blood pressure
16.Med-surg: neuro, endocrine & renalHard
A patient with SIADH needs IV fluid. Which fluid is most likely to worsen the hyponatraemia?
A3% saline
B5% glucose (dextrose, D5W)
C8.4% sodium bicarbonate
D20% human albumin
17.Med-surg: GI, perioperative & oncologyMedium
Which statement about moist wound healing is correct?
AA wet wound bed always prevents infection
BA moist, not wet, wound bed helps cells move and heal faster
CWounds heal fastest when left to dry out and form a scab
DWounds should be soaked in water for hours every day
18.Med-surg: GI, perioperative & oncologyHard
A patient with a toe ulcer says the leg pain is worse at night and eases when they hang the leg over the side of the bed. What does this suggest?
AArterial insufficiency
BNeuropathic itching
CVenous insufficiency
DLymphoedema
19.Maternity & obstetric nursingMedium
A woman with hyperemesis gravidarum has been vomiting for weeks. Which vitamin is given before glucose-containing fluids to prevent Wernicke encephalopathy?
APhytomenadione (vitamin K)
BThiamine (vitamin B1)
CVitamin D
DAscorbic acid (vitamin C)
20.Maternity & obstetric nursingHard
A woman with an epidural in labour now has a temperature of 38.0 °C (100.4 °F). Which statement is most accurate?
AFever in labour can be ignored if the baby is moving
BFever with an epidural always means the catheter is infected
CThe epidural may cause it, but infection must be ruled out
DFever with an epidural is always caused by the epidural
21.Pediatric nursingMedium
Using the 100–50–20 rule, what is the daily maintenance fluid requirement for a 15 kg child?
A750 mL per day
B1000 mL per day
C1250 mL per day
D1500 mL per day
22.Pediatric nursingHard
A 4-year-old says it is wrong to hit his sister "because then I get a time-out". Which level of Kohlberg's moral development does this reflect?
APostconventional level
BConventional level
CFormal operational level
DPreconventional level
23.Mental health nursingMedium
How does repetitive transcranial magnetic stimulation (rTMS) differ from ECT?
AIt is given as a daily tablet that contains tiny magnetic particles
BIt involves surgically implanting electrodes deep in the brain under anaesthetic
CIt needs a general anaesthetic and causes a seizure, like ECT
DIt uses magnetic pulses on the scalp while the patient is awake, without causing a seizure
24.Mental health nursingHard
A patient in a manic episode starts taking off her clothes in the busy day room. What is the most appropriate action?
AAsk the other patients to ignore her and carry on
BCalmly cover her and guide her to her room or a quiet area
CCall security to remove her from the ward
DTell her loudly in front of everyone that she must stop
25.Nursing math & unit conversionsMedium
Practice exercise (made-up values, not clinical guidance). A dose is charted at 1:00 PM. Which entry is the same time on the 24-hour clock? Click it.
1:00 PM
113:00
212:00
314:00
401:00
26.Nursing math & unit conversionsHard
Practice exercise (made-up values, not clinical guidance). A serum creatinine result is 50 µmol/L. Using 1 mg/dL = 88.4 µmol/L for creatinine, find c in mg/dL. Round to two decimal places.
50 µmol/L1 mg/dL = 88.4 µmol/L
c = mg/dL
27.Dosage calculationsMedium
A child weighing 8 kg is prescribed 3 mg/kg of a drug. The stock solution contains 10 mg/mL. Draw up the dose: what volume V do you give?
8 kg3 mg/kg10 mg/mL
V = mL
28.Dosage calculationsHard
A child weighing 28 kg is prescribed 12.5 mg/kg per dose of an oral suspension that contains 100 mg in 5 mL. What volume V do you give?
28 kg12.5 mg/kg100 mg/5 mL
V = mL
29.IV infusion ratesMedium
An infusion is ordered at 150 mL/h, but no pump is available. It runs by gravity through a giving set of 10 gtt/mL. Find the drip rate R in drops per minute.
150 mL/h10 gtt/mL
R = gtt/min
30.IV infusion ratesHard
1500 mL was ordered over 8 hours. After 3 hours you find that 1110 mL is still in the bag, and the order must still finish on time. By what percentage Δ must the original pump rate be increased?
1500 mL / 8 hafter 3 h: 1110 mL
Δ = %
31.IV fluids & fluid balanceMedium
Practice exercise (made-up values, not clinical guidance). The record shows a patient's intake and output for one 8-hour shift. The IV infusion ran at the rate shown for the whole shift. Find the total intake I in mL.
tea: 200 mLwater: 300 mLjuice: 100 mLIV infusion: 100 mL/h × 8 hIV antibiotic: 2 × 50 mL
I = mL
32.IV fluids & fluid balanceHard
Practice exercise (made-up values, not clinical guidance). A 1000 mL bag was started at 10:15 and runs by pump at 50 mL/h. How many mL V are left in the bag at 13:45?
1000 mL50 mL/h10:15 → 13:45
V = mL
33.Clinical assessment scoresMedium
Practice exercise (made-up values, not clinical guidance). A patient has a pulse of 121/min and a blood pressure of 76/49 mmHg. Find the shock index SI = HR/SBP. Round to two decimal places.
HR 121/minBP 76/49 mmHg
SI =
34.Clinical assessment scoresHard
Practice exercise (made-up values, not clinical guidance). A practice patient is assessed with the Morse fall scale: history of falling in the last 3 months: no; secondary diagnosis: no; ambulatory aid: none, bed rest or nurse assists; IV therapy or saline lock: no; gait: normal, bed rest or wheelchair; mental status: overestimates or forgets limits. Using the cut-offs 0–24 low, 25–44 moderate and 45 or more high, click the fall-risk level.
1low risk
2moderate risk
3high risk
3Solutions
1.Nursing fundamentals
Answer: C · Paraphrasing what the patient said to check understanding
Why this is the answer
Active listening includes attention, appropriate eye contact, nodding, reflecting and paraphrasing. It helps patients feel heard and gives the nurse accurate information.
Answer
C · Paraphrasing what the patient said to check understanding
2.Nursing fundamentals
Answer: C · It interacts with many medicines and can reduce their effect
Why this is the answer
St John's wort induces liver enzymes and can lower levels of drugs such as warfarin and the contraceptive pill. All herbal and over-the-counter products are recorded and reviewed.
Answer
C · It interacts with many medicines and can reduce their effect
3.Infection control & patient safety
Answer: D · It can be misread as QID or QOD, so the drug is given too often or too rarely
Why this is the answer
“QD” and “QOD” can be confused with each other and with “QID”, leading to serious dosing errors. The word “daily” or “every other day” is written in full instead.
Answer
D · It can be misread as QID or QOD, so the drug is given too often or too rarely
4.Infection control & patient safety
Answer: B · Into a red outlet connected to the emergency generator
Why this is the answer
In US hospitals, red outlets are usually connected to the emergency generator. Life-support equipment is plugged into them, and battery backups are checked as part of emergency planning.
Answer
B · Into a red outlet connected to the emergency generator
5.Prioritization & delegation
Answer: B · An 84-year-old taking a diuretic who has fallen before and gets up at night
Why this is the answer
A previous fall is one of the strongest risk factors. Older age, diuretics and getting up at night to urinate add further risk, so this patient needs fall precautions.
Answer
B · An 84-year-old taking a diuretic who has fallen before and gets up at night
6.Prioritization & delegation
Answer: C · Rapid cooling while supporting airway and circulation
Why this is the answer
Heat stroke is an emergency in which body temperature rises and the brain is affected. Rapid cooling, for example with cold water or ice, is the priority; antipyretics do not work for heat stroke.
Answer
C · Rapid cooling while supporting airway and circulation
7.Clinical nursing
Answer: B · Blood cultures
Why this is the answer
Blood cultures taken before antibiotics are more likely to grow the organism, which allows targeted treatment later. Antibiotics should still be given promptly and must not be delayed.
Answer
B · Blood cultures
8.Clinical nursing
Answer: A · "I will rub the area firmly after the injection."
Why this is the answer
Rubbing the site after an anticoagulant injection increases bruising and is avoided. Rotating sites, injecting subcutaneously and reporting bleeding are correct.
Answer
A · "I will rub the area firmly after the injection."
9.Lab values & electrolytes
Answer: C · Give several deep-cough samples, often first thing in the morning
Why this is the answer
Usually a series of three sputum samples is collected, at least one in the early morning, when secretions have pooled overnight. The patient rinses with water (not mouthwash), takes deep breaths and coughs deeply to bring up sputum, not saliva. Airborne precautions are used.
Answer
C · Give several deep-cough samples, often first thing in the morning
10.Lab values & electrolytes
Answer: B · Report urgently for imaging and possible reversal
Why this is the answer
A head injury in an anticoagulated patient, with worsening headache and drowsiness, suggests intracranial bleeding. The provider is told at once, neurological checks are done often, urgent imaging is arranged, and warfarin reversal (vitamin K and a prothrombin complex concentrate) may be prescribed.
Answer
B · Report urgently for imaging and possible reversal
11.Pharmacology
Answer: D · It forms a protective coating over the ulcer base
Why this is the answer
Sucralfate forms a gel-like barrier that sticks to the ulcer and protects it from acid and pepsin. It is taken on an empty stomach and can reduce the absorption of other drugs taken at the same time.
Answer
D · It forms a protective coating over the ulcer base
12.Pharmacology
Answer: C · Pulmonary fibrosis from bleomycin
Why this is the answer
Bleomycin can cause pneumonitis and pulmonary fibrosis, especially at higher cumulative doses. New respiratory symptoms are reported, and lung function may be monitored.
Answer
C · Pulmonary fibrosis from bleomycin
13.Med-surg: cardiovascular & respiratory
Answer: C · Rebound tachycardia and hypertension can trigger angina or MI
Why this is the answer
Long-term beta-blockade increases the number and sensitivity of beta receptors. Abrupt withdrawal exposes them to normal adrenaline levels, which can cause rebound tachycardia, hypertension and myocardial ischaemia. Doses are tapered.
Answer
C · Rebound tachycardia and hypertension can trigger angina or MI
14.Med-surg: cardiovascular & respiratory
Answer: D · Call for emergency help and prepare for urgent vascular surgery
Why this is the answer
Sudden abdominal or back pain with hypotension in a patient with an AAA suggests rupture, which is often fatal without urgent repair. The team is called at once, large-bore IV access and blood are arranged, and the patient goes to theatre. Fluid may be limited so the blood pressure is not pushed high (permissive hypotension), as directed by the team.
Answer
D · Call for emergency help and prepare for urgent vascular surgery
15.Med-surg: neuro, endocrine & renal
Answer: A · Sudden withdrawal can trigger seizures, including status epilepticus
Why this is the answer
Stopping antiepileptics abruptly can cause rebound seizures, which may be prolonged. Changes are made gradually under medical supervision, and missed doses should be avoided.
Answer
A · Sudden withdrawal can trigger seizures, including status epilepticus
16.Med-surg: neuro, endocrine & renal
Answer: B · 5% glucose (dextrose, D5W)
Why this is the answer
5% glucose (5% dextrose, D5W) provides free water once the glucose is metabolised. In SIADH, this water is kept, so sodium falls further. Hypotonic fluids are avoided. Hypertonic saline is used for severe symptomatic hyponatraemia.
Answer
B · 5% glucose (dextrose, D5W)
17.Med-surg: GI, perioperative & oncology
Answer: B · A moist, not wet, wound bed helps cells move and heal faster
Why this is the answer
A moist environment supports cell migration, autolytic debridement and less pain. Too much moisture causes maceration, so dressings are chosen to balance exudate.
Answer
B · A moist, not wet, wound bed helps cells move and heal faster
18.Med-surg: GI, perioperative & oncology
Answer: A · Arterial insufficiency
Why this is the answer
Rest pain eased by dependency is typical of severe peripheral arterial disease. Elevating the leg worsens pain, and compression is avoided. Vascular assessment is needed.
Answer
A · Arterial insufficiency
19.Maternity & obstetric nursing
Answer: B · Thiamine (vitamin B1)
Why this is the answer
Prolonged vomiting depletes thiamine. Giving glucose without thiamine can trigger Wernicke encephalopathy, with confusion, ataxia and eye movement problems.
Answer
B · Thiamine (vitamin B1)
20.Maternity & obstetric nursing
Answer: C · The epidural may cause it, but infection must be ruled out
Why this is the answer
Epidurals are associated with a rise in maternal temperature, but this cannot be assumed. Intra-amniotic infection must be considered, especially with prolonged rupture of membranes or fetal tachycardia.
Answer
C · The epidural may cause it, but infection must be ruled out
21.Pediatric nursing
Answer: C · 1250 mL per day
Why this is the answer
First 10 kg: 10 × 100 = 1000 mL. Next 5 kg: 5 × 50 = 250 mL. Total = 1250 mL per day, or about 52 mL per hour.
Answer
C · 1250 mL per day
22.Pediatric nursing
Answer: D · Preconventional level
Why this is the answer
At the preconventional level, typical of young children, right and wrong are judged by punishment and reward. Formal operational is one of Piaget's cognitive stages, not a Kohlberg level.
Answer
D · Preconventional level
23.Mental health nursing
Answer: D · It uses magnetic pulses on the scalp while the patient is awake, without causing a seizure
Why this is the answer
rTMS stimulates specific brain areas with a magnetic coil held on the head. It does not need anaesthesia or cause a seizure and is used for depression that has not responded to medicines.
Answer
D · It uses magnetic pulses on the scalp while the patient is awake, without causing a seizure
24.Mental health nursing
Answer: B · Calmly cover her and guide her to her room or a quiet area
Why this is the answer
Disinhibition in mania can lead to embarrassment and exploitation. The nurse protects her privacy and dignity quietly and moves her to a less stimulating environment.
Answer
B · Calmly cover her and guide her to her room or a quiet area
25.Nursing math & unit conversions
Answer: 13:00
24-hour clock: from 1 PM onwards add 12 to the hour (3:45 PM = 15:45). Midnight to 12:59 AM is 00:00–00:59, and 12:00–12:59 PM stays 12:00–12:59. Going back, subtract 12 from hours 13–23 and add PM; hours 00 become 12 AM. Count time across midnight in two parts: up to 24:00 (00:00), then from 00:00 on.
Convert the hour
1 PM → 1 + 12 = 13
Answer
13:00
Answer
13:00
26.Nursing math & unit conversions
Answer: c = 0.57 mg/dL
Dimensional analysis: write the given quantity, then multiply by conversion factors written as fractions (for example 60 min/1 h or 1 mg/1000 mcg) so that each unwanted unit appears once on top and once underneath and cancels. When only the wanted unit is left, calculate. Use the equivalents the question gives and round only the final answer.
Convert
c = 50/88.4 = 0.5656 ≈ 0.57 mg/dL
Answer
c = 0.57 mg/dL
27.Dosage calculations
Answer: V = 2.4 mL
Drawing up a dose: volume = (prescribed dose/stock strength) × stock volume. Convert to the same units first, then check that the volume fits the syringe and lands on one of its graduations.
Dose from body weight
D = 3·8 = 24 mg
Volume
V = 24/10 = 2.4 mL
On the syringe
On this 10 mL syringe every small line is 0.2 mL.
Answer
V = 2.4 mL
28.Dosage calculations
Answer: V = 17.5 mL
Dose calculation: the amount to give equals what is prescribed divided by what you have, times the quantity it comes in: amount = (desired dose/stock strength) × stock volume. Always keep the units the same (convert g to mg, mg to mcg first) and check that the answer is sensible.
Dose from weight
12.5·28 = 350 mg
Volume
V = (350/100)·5 = 17.5 mL
Answer
V = 17.5 mL
29.IV infusion rates
Answer: R = 25 gtt/min
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.
Millilitres per minute
150/60 = 2.5 mL/min
Drip rate
R = 2.5·10 = 25 gtt/min
Answer
R = 25 gtt/min
30.IV infusion rates
Answer: Δ = 18.4 %
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.
Original rate
1500/8 = 187.5 mL/h
New rate
R = 1110/5 = 222 mL/h
Percentage change
Δ = (222 − 187.5)/187.5·100% = 18.4%
Answer
Δ = 18.4%
Many hospitals allow such an adjustment up to 25% without a new order; check local policy.
31.IV fluids & fluid balance
Answer: I = 1500 mL
Intake and output: intake counts everything that goes in (oral fluids, IV infusions, IV medications and flushes, tube feeds); ice chips count as half their volume. Output counts urine, drains, vomit and other losses. Balance = total intake − total output; a negative balance is a net loss. The numbers are for practice only; at the bedside always follow local protocols and have high-risk doses double-checked.
Add the intake
oral: 200 + 300 + 100 = 600 mL
IV infusion: 100·8 = 800 mL
IV antibiotic: 2·50 = 100 mL
I = 1500 mL
Answer
I = 1500 mL
32.IV fluids & fluid balance
Answer: V = 825 mL
Infusion time: time (h) = volume to infuse (mL)/rate (mL/h); use the volume still left in the bag, not the bag size. Volume infused = rate × time. Convert decimal hours to hours and minutes with the fraction × 60 (0.5 h = 30 min, not 50 min). The numbers are for practice only; at the bedside always follow local protocols and have high-risk doses double-checked.
Elapsed time
10:15 → 13:45 = 3.5 h
Volume infused
50·3.5 = 175 mL
Volume left
V = 1000 − 175 = 825 mL
Answer
V = 825 mL
33.Clinical assessment scores
Answer: SI = 1.59
Blood pressure values: pulse pressure PP = SBP − DBP. Mean arterial pressure MAP ≈ (SBP + 2·DBP)/3 = DBP + PP/3, an estimate based on the heart spending about two thirds of each beat in diastole at a normal heart rate (less accurate when the heart rate is fast); a MAP of at least about 65 mmHg is a common target for organ perfusion. The shock index SI = heart rate/SBP is normally about 0.5–0.7; a value above about 1 is a warning sign of shock.
Shock index
SI = 121/76 = 1.592 ≈ 1.59
Answer
SI = 1.59
1 or more: a warning sign of shock in this practice case.
34.Clinical assessment scores
Answer: low risk
Morse fall scale: six items. History of falling: no 0, yes 25. Secondary diagnosis: no 0, yes 15. Ambulatory aid: none, bed rest or nurse assistance 0; crutches, cane or walker 15; holding on to furniture 30. IV therapy or saline lock: no 0, yes 20. Gait: normal, bed rest or wheelchair 0; weak 10; impaired 20. Mental status: knows own limits 0; overestimates or forgets limits 15. The total runs from 0 to 125. Risk cut-offs differ between hospitals; a common set is 0–24 low, 25–44 moderate and 45 or more high.
Score each item
history of falling in the last 3 months: no → 0
secondary diagnosis: no → 0
ambulatory aid: none, bed rest or nurse assists → 0
IV therapy or saline lock: no → 0
gait: normal, bed rest or wheelchair → 0
mental status: overestimates or forgets limits → 15