Nursing · Adult clinical nursing
Read the pattern, not the number — and check the identity band every single time
Anaemia is one of the commonest medical conditions on earth, affecting a substantial share of women and young children, and blood results are frequently the first sign of something happening somewhere else entirely — a bleeding bowel cancer, liver disease, leukaemia. Sickle cell disease and thalassaemia affect very large numbers of people and are lifelong from birth. And transfusion is the highest-risk routine task in nursing: it is performed on every kind of ward by ordinary nurses, giving it to the wrong person kills, and almost every such death is a failure of identification rather than of the laboratory. Few tasks combine this much familiarity with this severe a consequence for one lapse.
Anaemia is one of the commonest medical conditions in the world, affecting a substantial proportion of women and young children, and it is the single largest reason blood results are abnormal. A nurse anywhere on earth will meet it constantly.
A low red cell count reveals a bleeding bowel cancer, a low platelet count reveals liver disease, and a high white count reveals infection or leukaemia. Blood results are frequently the first sign of something happening elsewhere entirely.
Giving blood is done on every kind of ward by ordinary nurses, and giving it to the wrong person kills. Few tasks in nursing combine this much routine familiarity with this severe a consequence for a lapse.
Sickle cell disease and thalassaemia affect very large numbers of people, concentrated in particular parts of the world, and are lifelong from birth. Where they are common they are a major part of paediatric and adult practice.
Somebody who cannot clot bleeds to death, and somebody who clots too readily blocks a lung or a brain. Both happen on general wards, both are frequently caused by treatment, and both are recognised at the bedside.
Red cells are packed with a protein that binds oxygen in the lungs and releases it in the tissues. Too few of them, or too little of that protein, means tissues are short of oxygen, which is what anaemia actually is.
Several kinds of white cell handle different threats, and the ones that deal with ordinary bacteria are the ones whose loss is most immediately dangerous. Their number, and which type is low, determines what a patient is vulnerable to.
Platelets are fragments that clump at a break in a vessel wall and form the first plug. When they are low or not working, bleeding shows in the skin and mucous membranes as bruising, nosebleeds and gum bleeding.
The liquid fraction carries clotting proteins, antibodies, nutrients, hormones and waste. Several important disorders are of the proteins in plasma rather than of any cell, which is why a normal cell count does not mean normal blood.
One blood test reports all three cell lines, and the pattern matters more than any single figure: all three low points to the marrow, one low points to a specific process, and a trend over days says more than one value.
A sample that clotted in the tube, was underfilled, was shaken, sat for hours in the heat, or was taken from above a running drip produces a confidently wrong result that may be acted on. A great deal of apparent haematological mystery is a filling or handling problem, and the person who took the blood is the only one who knows.
All blood cells are produced in the marrow inside bones from a common ancestor cell, which is why a problem in the marrow lowers everything at once and why marrow disease presents as infection, anaemia and bleeding together.
The kidney senses low oxygen and releases a hormone that tells the marrow to make more red cells, which is why kidney failure causes anaemia that iron will not correct. The mechanism explains the treatment.
Iron, vitamin B12, folate and protein are required to make red cells, and a shortage of any one produces anaemia with a characteristic appearance. That is why the size of the red cells points towards which deficiency it is.
Red cells live around four months, platelets days, and some white cells only hours, which is why the effect of marrow suppression on white cells appears within days while anaemia takes weeks. The timing is predictable.
The spleen filters out worn or abnormal cells, so an enlarged spleen can remove too many and cause low counts, while a person without a spleen loses an important defence against certain bacteria and needs lifelong protection.
Tiredness, breathlessness on exertion, dizziness, palpitations, headache, poor concentration and pallor. Developing slowly, it is frequently attributed to age, overwork or low mood, and people adapt to a degree that surprises everybody once it is corrected.
Blood is being lost, cells are being destroyed faster than they are replaced, or not enough are being made. Every cause fits one of those three, and asking which one it is organises the entire investigation.
Small pale cells suggest iron deficiency or thalassaemia; large cells suggest B12 or folate deficiency, alcohol or thyroid disease; normal-sized cells suggest bleeding, kidney disease or chronic illness. This is the most useful single clue.
How quickly it developed matters as much as how low it is. Somebody who has become anaemic over months tolerates a level that would cause collapse if it appeared over hours, which is why the rate of change guides urgency.
Anaemia always has a cause, and treating it with iron without establishing why is how a bleeding bowel cancer is missed for a year. In an adult, particularly an older man or a postmenopausal woman, iron deficiency means looking for bleeding.
Iron deficiency is the leading cause of anaemia globally, driven by inadequate intake, poor absorption, blood loss and the demands of pregnancy and growth. It is cheap to treat and enormously under-treated.
In women of reproductive age, heavy periods and pregnancy. In everybody else, bleeding from the gut until proved otherwise. In children and in poorer populations, dietary lack, worm infestation and repeated infection.
Brittle nails, hair loss, a sore tongue, cracks at the corners of the mouth, and a craving to eat non-food substances such as ice or earth. That last one is specific, frequently concealed, and worth asking about directly.
Oral iron commonly causes nausea, constipation and dark stools, which is why people stop taking it. Explaining the side effects beforehand, and that stools turning black is expected, prevents alarm and abandonment.
Taking iron with something containing vitamin C improves absorption, and taking it with tea, calcium or certain medicines reduces it substantially. These are simple, free and rarely explained.
Both are needed to make red cells, producing large cells when deficient. B12 deficiency also damages nerves, causing numbness, unsteadiness and confusion that may not recover, which is why it is not simply an anaemia.
B12 requires a substance made in the stomach to be absorbed, so stomach disease or surgery causes deficiency regardless of diet. It also occurs in people eating no animal products, which makes dietary history genuinely relevant.
Long-term inflammation, infection or cancer produces anaemia by locking iron away and blunting the marrow's response. Giving iron does not help, and the treatment is of the underlying condition.
Failing kidneys produce less of the hormone that drives red cell production, causing anaemia that responds to replacing that hormone rather than to iron. Recognising the mechanism prevents months of ineffective treatment.
When the marrow fails, all three cell lines fall together, producing anaemia, infection and bleeding at once. That combination on a blood count is a specific and serious pattern that requires urgent assessment.
An inherited change makes the oxygen-carrying protein form rigid crescent-shaped cells when oxygen is low, when the person is dehydrated, cold, infected or stressed. Those cells block small vessels and are destroyed early.
Blockage causes episodes of severe pain and organ damage; early destruction causes lifelong anaemia. Most of what a person experiences follows from those two, and most of what precipitates an episode is avoidable.
Disease requires the change from both parents; one copy gives the trait, which causes almost no illness but can be passed on. Explaining that distinction to families is a recurring and important task.
Repeated blockage destroys the spleen in childhood, leaving the person highly vulnerable to particular bacteria. That is why vaccination and preventive antibiotics from infancy save lives, and why fever is always taken seriously.
Sickle cell disease shortens life, damages the kidneys, lungs, eyes, bones and brain, and causes strokes in children. Where it is common it deserves the same seriousness as any other major chronic disease, and it frequently does not receive it.
Pain in a sickle episode is frequently as severe as any in medicine and is consistently under-treated, because staff doubt the reported severity in a patient who looks well and has no visible sign. The evidence on this is uncomfortable and clear.
Patients with sickle disease know exactly what works for them, request it confidently, and are therefore suspected of addiction. Being knowledgeable about your own lifelong illness is not a warning sign, and treating it as one causes real harm.
Prompt and adequate analgesia, warmth, hydration, oxygen where indicated, and looking for the precipitating infection. Delay in any of those prolongs the episode, and the first hour matters.
Cold and dehydration provoke and prolong sickling, so a patient waiting in a cold department without fluids is being actively harmed. Warmth and fluids are treatment rather than comfort measures.
Chest pain, breathlessness and fever in a sickle patient can mean a life-threatening lung crisis that deteriorates rapidly. It is not treated as a chest infection to be reviewed later, and recognising it early is a nursing responsibility.
An inherited fault reduces production of part of the oxygen-carrying protein, so red cells are small, pale and short-lived. The severity ranges from almost nothing to dependence on transfusion from infancy.
Severe forms require regular lifelong transfusion to survive and to grow, which dominates the family's life and requires reliable access to safe blood. In much of the world that access is the limiting factor.
Repeated transfusion delivers iron that the body cannot excrete, which damages the heart, liver and hormone glands. Treatment to remove iron is therefore as important as the transfusion itself and is frequently the part that is neglected.
Iron removal treatment is burdensome and its benefit is invisible and decades away, so young people stop, and the consequence appears as heart disease in their twenties. Support with adherence is genuinely life-extending work.
Both produce small pale cells, and giving iron to somebody with thalassaemia adds to an iron load that is already dangerous. Distinguishing them before treating is not a technicality.
When red cells are destroyed faster than they are made, the person becomes anaemic, jaundiced, and may have an enlarged spleen and dark urine. That triad together points firmly at destruction rather than at any other mechanism.
The cell itself may be abnormal, as in sickle disease and certain enzyme deficiencies, or it may be normal and attacked from outside by antibodies, infection, drugs or mechanical damage. The distinction determines treatment.
A common inherited enzyme deficiency causes sudden destruction of red cells after certain medicines, certain foods, and infection. Knowing a patient has it changes what they can safely be given, and it is frequently not recorded anywhere.
The immune system can produce antibodies against a person's own red cells, sometimes triggered by infection, drugs or another disease. It can develop rapidly and become severe, and it has specific treatment.
A mother's antibodies can cross to attack her baby's red cells, causing jaundice and anaemia in the newborn. Preventing it by treating the mother is one of the clearest preventive successes in medicine.
Different white cells defend against different things, so which type is deficient determines the vulnerability. The cells that fight ordinary bacteria are the ones whose loss produces immediate and life-threatening risk.
A raised white count usually means infection, inflammation or steroid treatment, but a very high count, or one with abnormal-looking cells, points to leukaemia. The difference is in what the cells are as much as how many.
In somebody whose neutrophils are low from chemotherapy or from marrow disease, fever is a medical emergency needing immediate antibiotics, because the visible signs of infection are produced by the cells that are missing.
Hand hygiene, avoiding unnecessary invasive procedures, mouth care, attention to any skin break, and keeping visibly infectious people away. Most of the protection is basic and is delivered by nurses rather than prescribed.
People with no spleen or a non-functioning one are at risk of sudden overwhelming infection from particular bacteria, and need vaccination, sometimes lifelong antibiotics, and a card or bracelet. Fever in them is an emergency.
Immature cells multiply uncontrollably in the marrow, crowding out normal production, so the person presents with anaemia, infection and bleeding together, developing over weeks. That triad is the presentation.
Tiredness, recurrent infection, bruising, bleeding gums, bone pain, night sweats and swollen glands. Children are frequently treated for infection or for growing pains for weeks, and the blood count is what reveals it.
Treatment involves prolonged, intensive chemotherapy with long periods of very low counts, which means the supportive nursing — infection prevention, transfusion, mouth care, nutrition, line care — largely determines survival.
The commonest childhood leukaemia is now curable in a large majority in well-resourced settings, which makes intensive treatment genuinely worth enduring. Where it is not cured, the reason is usually access rather than biology.
When treatment destroys a large volume of cells rapidly, the released contents can injure the kidneys and disturb the heart's rhythm. Patients at risk are hydrated and monitored closely from before treatment begins.
Chronic leukaemias develop over years, may be found incidentally on a blood test in somebody entirely well, and are sometimes monitored without treatment for a long time. Being told to wait feels like neglect and needs explaining.
Somebody told they have a blood cancer that will not be treated yet occupies a genuinely difficult position, and their distress is frequently unacknowledged because no treatment is being given. It deserves attention in its own right.
Chronic blood disorders frequently enlarge the spleen, causing discomfort, early fullness on eating, and removal of too many blood cells. A very large spleen can also rupture, so it is protected from injury.
Some disorders produce too many red cells or platelets, thickening the blood and raising the risk of clots and stroke. These are treated to reduce that risk rather than to relieve symptoms, which patients find counterintuitive.
Several of these conditions are now controlled with long-term oral treatment taken at home indefinitely. Adherence over years, side effect management and regular monitoring become the whole of the care.
Lymphoma arises in the lymphatic tissue and usually presents as painless enlarged lymph nodes, most often in the neck, armpit or groin, in somebody who may otherwise feel well. A persistent painless node is the classic finding.
Fever without infection, drenching night sweats and unexplained weight loss carry particular significance and change the stage. Asking specifically about soaking the bedsheets is more informative than asking about sweating.
Several lymphomas are curable even when widespread, which makes this one of the situations where extensive disease does not mean incurable. Saying so matters, because patients assume the opposite.
Masses in the chest can obstruct the airway or the large vein returning blood from the head, producing breathlessness and facial swelling that is worse lying flat. That is an emergency rather than a symptom to be noted.
Because it does not hurt, people wait months. A firm painless node that persists beyond a few weeks, particularly with weight loss or sweats, warrants assessment — and saying that plainly to the public is worth doing.
An abnormal plasma cell population in the marrow produces bone pain and fractures, kidney impairment, raised calcium and anaemia. Those four together are the pattern, and each alone is usually attributed to something else.
Persistent back pain with anaemia and raised calcium in an older person is a recognised presentation that is regularly managed as simple mechanical back pain for months while vertebrae collapse.
The disease weakens bone so that it fractures with little force, including collapse of vertebrae with cord compression. Escalating bone pain, or new weakness and bladder change, is urgent.
The abnormal protein produced damages the kidneys, and dehydration, certain painkillers and contrast for scans worsen it. Maintaining hydration is a specific and important nursing contribution.
Myeloma is generally treated as a long-term condition with periods of control and relapse rather than a single course of treatment, which shapes how somebody plans their life and needs to be explained as such.
Pinpoint red spots that do not fade under pressure, easy bruising, nosebleeds, gum bleeding and heavy periods. Bleeding into the skin and mucous membranes is the signature, and it differs from the deep joint bleeding of clotting protein disorders.
Low platelets may be from marrow suppression, immune destruction, an enlarged spleen, infection, medicines or pregnancy. Some are trivial and some require immediate action, so the cause matters more than the number.
A soft toothbrush, no razors, avoiding constipation and straining, avoiding injections into muscle, and no contact activity. Simple, specific, and usually explained far too briefly.
A severe headache, visual change, confusion, blood in urine or stool, or bleeding that will not stop. Bleeding into the brain is the danger, and the patient needs to know which symptoms to act on immediately.
Some medicines stop platelets functioning even when the count is normal, which is why a patient on them bleeds more during procedures. Knowing what they take explains bleeding that the count does not.
A series of plasma proteins activate one another in sequence to build a firm clot on the platelet plug. A deficiency anywhere in that chain causes bleeding, and the tests used measure different parts of it.
Clotting protein deficiency produces deep bleeding into joints and muscles rather than the skin bleeding of low platelets. Recognising which pattern a patient has narrows the cause immediately.
Most clotting proteins are made in the liver and several require vitamin K, so liver disease and vitamin K deficiency both cause bleeding. That is why a liver patient bleeds and why newborns are given vitamin K.
Natural mechanisms break clots down and prevent them spreading, and inherited faults in those mechanisms cause a tendency to clot. A young person with an unexplained clot, or a strong family history, is investigated for it.
The clotting tests measure different pathways and different treatments affect different tests, which is why the right test is sent and why a sample taken from a line containing heparin gives a meaningless answer.
An inherited deficiency of a clotting protein, largely affecting males, causing bleeding into joints and muscles from childhood. Repeated joint bleeding destroys joints permanently, which is why treating a bleed promptly matters so much.
In haemophilia, a suspected bleed is treated immediately rather than after investigation, because damage happens while confirmation is being sought. A patient saying a joint bleed is starting is usually correct.
A deficiency affecting platelet function is actually more common than haemophilia, affects both sexes, and causes nosebleeds, bruising and heavy periods. It is frequently undiagnosed in women told their periods are simply heavy.
In somebody with a bleeding disorder, a head injury, abdominal pain or a swollen limb is treated as a serious bleed until excluded. What looks minor externally may be substantial inside.
Patients and families with lifelong bleeding disorders manage treatment at home and understand their condition in detail. Listening to them, and not obstructing their established plan, is the most useful thing a general nurse can do.
A clot in a deep leg vein causes a swollen, warm, painful calf, and can travel to the lung causing sudden breathlessness, chest pain and collapse. The second is the one that kills, and it follows the first.
Immobility, surgery, cancer, pregnancy, oestrogen-containing treatment, long travel, dehydration, obesity and inherited tendencies. Almost every hospital inpatient has at least one, which is why prevention is assessed routinely.
Early mobilisation, adequate fluids, and the prescribed preventive measures. Stockings applied wrongly or left off, and a patient not helped to walk, are the commonest failures and both are nursing ones.
A slightly swollen calf in a post-operative patient, or breathlessness attributed to anxiety or to a chest infection. The diagnosis is frequently delayed because each symptom alone is unremarkable.
Clots in the arm, the abdomen or the brain occur and are frequently missed because nobody expects them there. Unexplained severe headache, abdominal pain or a swollen arm in a person at risk warrants thought.
Treatment is given either to prevent clots in somebody at risk or to treat a clot that has formed, and the intensity differs greatly. Confusing preventive and treatment intensity is a recognised and serious error.
The benefit is always balanced against bleeding risk, and the commonest serious harm is bleeding into the gut or the brain. A patient on these treatments who becomes anaemic, confused or has black stools is investigated urgently.
Some require regular blood testing and dose adjustment while others do not, and some are affected by diet, alcohol and many other medicines. A patient who does not know which kind they are on cannot manage it safely.
Both are dangerous in opposite directions, and both happen in hospital through poor handover and at home through confusion. Checking that a dose was actually given, and recording an omission with its reason, prevents real harm.
Stopping and restarting these treatments around surgery requires a plan, and both stopping unnecessarily and continuing inappropriately cause harm. The plan is asked for rather than assumed.
In severe illness the clotting system can activate throughout the body, using up platelets and clotting proteins, so the person forms small clots everywhere and simultaneously bleeds from everywhere. It is a sign of something very serious.
Severe infection, major trauma, obstetric catastrophe, some cancers and severe burns. It is a consequence rather than a disease, which is why treatment is of the underlying cause as much as of the clotting.
Oozing from cannula sites and around lines, bruising, bleeding from the gums and nose, in a patient who is severely unwell. Bleeding from puncture sites in a septic patient is a specific and ominous observation.
Management depends on repeated blood testing and replacement of what is being consumed, so accurate, promptly delivered samples and correctly checked blood products are the practical nursing contribution.
Its appearance means the underlying illness is severe and deteriorating, so its recognition should raise the level of care rather than simply generate a clotting request. The patient needs escalating, not just testing.
Blood is usually separated into red cells, platelets and plasma so that each patient receives only what they need. Asking which component and why makes the whole subject clearer than thinking about blood as one thing.
Red cells are given for symptomatic anaemia or significant blood loss, judged on how the patient is rather than on a number alone. A stable patient's anaemia is frequently better investigated and treated at its cause.
Platelets are given for bleeding or a very low count, and plasma to replace clotting proteins. They have different storage, different transfusion times and different precautions, which is why they are not interchangeable in practice.
Blood depends entirely on donors and is in short supply in much of the world, where the limiting factor in treating haemorrhage, thalassaemia and childbirth complications is availability of safe blood. Wasting a unit is not a trivial matter.
Transfusion is refused on religious grounds by some patients, and that refusal is respected, planned around in advance where possible, and does not reduce the care they receive. Knowing it before an emergency changes what can be offered.
Giving a unit intended for another patient can cause immediate massive destruction of red cells, shock, kidney failure and death. Almost every such event is a failure of identification rather than of the laboratory.
Every earlier step can go wrong, and the check performed at the bedside against the patient's own identity band, with the patient asked to state their name where possible, is what catches it. It is done every single time.
The nurse who has done this a thousand times without incident is the one most likely to shortcut it. Procedures here exist precisely because the task is routine, and being interrupted during it is a safety issue.
A blood sample taken from one patient and labelled with another's details produces a confidently wrong blood group. That is why samples are labelled at the bedside, from the patient's own band, never in advance and never elsewhere.
Baseline observations, close monitoring in the early minutes when severe reactions appear, and regular checks after. A reaction recognised in the first few minutes and stopped is survivable in a way that one recognised late is not.
Every blood sample and every unit is treated as potentially infectious, because a person's blood-borne infection status is frequently unknown to them and to you. Gloves, careful sharps handling, never resheathing a needle, and reporting any needlestick immediately rather than at the end of the shift, since treatment that prevents infection works best given early.
At any sign of a reaction, the transfusion is stopped, the line kept, the patient assessed and help summoned, and the unit retained. Stopping first and asking questions afterwards is the correct order.
Fever, chills, pain at the site or in the back, breathlessness, restlessness, a fall in blood pressure and dark urine within minutes suggests destruction of the transfused cells. This is an emergency.
Transfusing too much or too fast, particularly in older people, in heart failure or in children, causes breathlessness, raised blood pressure and fluid on the lungs. It is one of the commonest serious complications and it is preventable by rate.
Fever or an itchy rash during a transfusion is usually less serious but is treated as significant until assessed, because the early signs of a dangerous reaction and a mild one overlap. Nobody can tell which it is at the start.
Reactions days afterwards, the development of antibodies that complicate future transfusion, iron loading in repeatedly transfused patients, and transmitted infection where screening is limited. Documenting every transfusion matters for years.
Diseased or destroyed marrow is replaced with healthy stem cells, either the patient's own collected earlier or a matched donor's. It offers cure in conditions that would otherwise be fatal and it carries substantial risk.
After the conditioning treatment the patient has essentially no marrow function for weeks, requiring intensive infection prevention, transfusion support and nutrition. Nursing care during that window largely determines survival.
Donor immune cells may attack the recipient's skin, gut and liver, which can be mild or life-threatening and can appear months later. Rashes, diarrhoea and jaundice after a donor transplant are reported rather than managed locally.
Weeks of protective isolation, away from family, feeling extremely unwell, is psychologically demanding in a way that is frequently underestimated. Contact, routine and honest information are part of the treatment.
Immune recovery takes many months, vaccinations must be repeated, and fatigue persists long after discharge. Patients told the transplant was successful and then left exhausted for a year needed that timeframe explained.
There is no mechanism to remove excess iron, so it accumulates and deposits in the heart, liver, pancreas and hormone glands, damaging all of them. That is why iron overload is treated actively rather than observed.
Repeated transfusion, and an inherited condition causing excessive absorption from the diet. The inherited form is common in some populations and presents with fatigue, joint pain, diabetes, liver disease and darkened skin.
Diabetes, liver disease, heart failure, joint pain and impotence are how iron overload declares itself, so it is diagnosed years late by somebody who thought to test for it. The symptoms are individually unremarkable.
Iron is removed either by regularly taking off blood, where the person is not anaemic, or by treatment that binds and excretes it. Both are long-term and both depend heavily on the person continuing.
Iron given to somebody with thalassaemia or iron overload adds to a dangerous load, and it happens because small pale cells were assumed to mean deficiency. Confirming before treating is the point.
Demand for iron and folate rises substantially in pregnancy, and anaemia in pregnancy increases the risk of haemorrhage, poor fetal growth and maternal death. Supplementation and screening are routine because they work.
Bleeding after childbirth is a leading cause of maternal death worldwide, and survival depends on recognising it early and on the availability of blood. This is the point at which blood supply becomes a matter of women dying or not.
Where a mother's blood group differs from her baby's in a particular way, her antibodies can attack the baby's red cells in this or a future pregnancy. Preventive treatment for the mother is a major and simple success.
Newborn jaundice is common and usually harmless, but severe jaundice can cause permanent brain damage, and it is more likely with blood group incompatibility, prematurity and certain enzyme deficiencies. Assessing rather than reassuring is what prevents harm.
Screening newborns for sickle cell disease and other disorders allows preventive treatment from infancy, which substantially reduces early deaths. Where the programme exists, ensuring the result reaches the family is the nursing task.
In almost every condition in this manual, fatigue is what patients report as most limiting, and it is the symptom least often addressed. Acknowledging it, and asking what it stops them doing, is a genuine intervention.
Someone with sickle disease, thalassaemia or haemophilia has had appointments, needles and restrictions since infancy, and has usually been disbelieved at some point. That history shapes how they arrive in your department.
Patients whose pain has been questioned, or who have been suspected of drug seeking, avoid or delay seeking care afterwards. The cost of that scepticism is paid in later crises and it is entirely avoidable.
Young people moving from children's to adult services frequently disengage, and that is when complications accumulate. A planned handover with overlap rather than a discharge letter is the intervention.
Inherited blood disorders affect siblings, carry questions about having children, and involve guilt that is rarely spoken about. Asking how the rest of the family is doing opens something that is usually left closed.
Transfusion identity checking and reaction management is the most reliably examined topic. Also fever with low neutrophils, sickle pain episodes, recognising deep vein clots, and the pattern of low counts across all three lines.
Treating anaemia with iron without finding the cause; giving iron to somebody with thalassaemia; doubting reported sickle pain; letting a sickle patient get cold or dehydrated; labelling a transfusion sample away from the bedside; continuing a transfusion while assessing a possible reaction.
Stop the transfusion first, keep the line, retain the unit. Treat sickle pain promptly and adequately. Anaemia is a finding with a cause. Fever with low neutrophils is an emergency. Check identity against the band, every time.
Label at the bedside. Ask the patient to state their name. Ask whether they crave eating ice or earth. Warn them that iron makes stools black. Ask what the fatigue stops them doing. Believe the patient who says a bleed is starting.
This subject rewards reading the pattern rather than the number — which cell lines are low, how fast it happened, where the bleeding shows, what the person actually looks like. A single value has almost never answered the question.
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