01Principles and purposeThe professional or clinical skill and the decisions it supports.
Optimisation is the treatment of modifiable problems that may reduce the patient’s ability to tolerate surgery and recover. It begins when an operation is contemplated, because investigating anaemia, improving intake and supporting behaviour change often need time. The interval before surgery should have specific actions and review dates rather than become an undefined waiting period. The potential gain must be balanced against harm from delaying the operation, particularly when cancer, obstruction or another progressive condition is present.
Anaemia, malnutrition, smoking and alcohol use can interact but should not be collapsed into a single lifestyle judgement. A patient losing weight through dysphagia needs a diagnostic and nutritional plan; a patient drinking heavily may need supervised withdrawal; someone with iron deficiency may be bleeding from the disease for which surgery is proposed. Ask what prevents change and offer appropriate support. Labels such as non-compliant can conceal pain, poverty, dependence, adverse effects or inaccessible services that the team could help address.
The desired outcome is not a cosmetically improved preoperative chart. A higher haemoglobin without investigation of unexplained iron deficiency can leave important disease undiagnosed. Weight gain from oedema does not establish nutritional recovery. Reported abstinence does not show that withdrawal risk has been managed. Define what success means for each problem: a cause investigated, a tolerated treatment, an improving trend, a safe withdrawal plan or an achievable support arrangement. Revisit the surgical decision when the expected benefit of further preparation changes.
Key points
- Investigate the cause of anaemia early; a low haemoglobin is a finding rather than a complete diagnosis.
- Choose oral or intravenous iron according to confirmed deficiency, tolerance, absorption and time before surgery.
- Assess recent weight loss and intake as well as BMI; obesity does not exclude malnutrition.
- Identify refeeding risk before rapidly increasing nutrition in a person with prolonged poor intake.
- Offer practical smoking-cessation support and treatment rather than advice without a route to help.
- Assess alcohol dependence and previous withdrawal before recommending abrupt cessation ahead of surgery.
02Situations and prioritiesThe context, relevant information and actions that matter most.
A newly low haemoglobin shortly before major surgery requires assessment of severity, symptoms, cause and likely blood loss. Do not automatically cancel or transfuse. Involve the surgical and anaesthetic teams to weigh the benefit of investigation or treatment against the consequences of delay.
Recent unintentional weight loss, reduced food intake or loss of muscle function can indicate nutritional risk at any body size. Ask about swallowing, nausea, early satiety, bowel symptoms and access to food. A single weight can miss a substantial decline from baseline.
A history of withdrawal seizures, delirium tremens, morning drinking or symptoms relieved by alcohol suggests that abrupt cessation may be dangerous. Obtain specialist assessment and an appropriate monitored withdrawal plan. Agitation or tremor before surgery may need urgent treatment rather than an assumption of anxiety.
A person with very limited intake who develops weakness, oedema, arrhythmia or respiratory difficulty after feeding needs urgent assessment for electrolyte and fluid shifts. Identify risk before increasing nutrition and involve the nutrition team; an apparently generous calorie prescription can create harm.
03Assessment and interpretationHow to gather information, assess the situation and recognise uncertainty.
Consider the information, its meaning and its limitations before deciding what follows.
- 01
Characterise anaemia and iron status - Why
- Distinguish iron deficiency from other causes and identify the underlying disease.
- Interpretation and limitations
- Review the full blood count, indices, ferritin and relevant inflammatory markers, with additional tests guided by the pattern and history. Ferritin can rise with inflammation, so a reassuring isolated value may not exclude iron-restricted erythropoiesis. Ongoing blood loss, renal disease and mixed deficiencies may coexist.
- 02
Assess nutrition and functional reserve - Why
- Determine the extent and cause of reduced intake and weight loss.
- Interpretation and limitations
- Use the locally adopted validated screening process and a dietary history. Record percentage weight change, duration of poor intake and functional difficulty rather than BMI alone. Albumin is affected by inflammation and other disease; it is not a stand-alone measurement of the patient’s calorie or protein intake.
- 03
Assess tobacco dependence and previous attempts - Why
- Choose support that matches the patient’s experience and preferences.
- Interpretation and limitations
- Ask about current smoking, dependence, past cessation treatments and what helped or failed. Connect the discussion to practical perioperative goals without promising an exact individual reduction in complications. Offer access to cessation services and an appropriate medicine plan.
- 04
Assess alcohol use and withdrawal risk - Why
- Identify who needs supported reduction or medically assisted withdrawal.
- Interpretation and limitations
- Use a structured history or validated tool, with last intake, dependence symptoms, prior complications and coexisting illness. A weekly unit total alone cannot show whether sudden cessation is safe. Consider nutritional deficiency, liver disease and social support when planning admission and treatment.
04Worked approachesCases with ordered reasoning, an action and a check of the outcome.
01Worked caseAnaemia and weight loss before cancer surgeryA 62-year-old is preparing for a major colorectal cancer operation in four weeks. Haemoglobin is 98 g/L, ferritin is low, and weight has fallen from 75 kg to 68 kg over three months. They stopped iron tablets because of nausea and have been eating mainly soup.+
- 1Identify separate but related problems: confirmed iron deficiency, substantial unintentional weight loss and inadequate intake. Calculate the weight change as 7/75, approximately 9.3%, rather than assuming the current BMI captures the decline. Assess symptoms and whether there is ongoing bleeding or another deficiency.
- 2Discuss the anaemia pathway with the surgical and anaesthetic teams. Oral intolerance and the limited preparation time make intravenous iron a reasonable consideration under NICE guidance, but the specific product and calculated dose require an appropriate prescribing assessment. Do not default to red-cell transfusion simply to normalise a preoperative number.
- 3Refer for dietetic assessment of energy, protein and micronutrient needs and the cause of restricted eating. Check whether obstruction, pain or intolerance limits what is feasible. Assess refeeding risk before rapidly increasing support; the plan must fit the functioning gastrointestinal tract and the operation’s urgency.
- 4Agree an active four-week plan with dates for treatment, reassessment and communication. The final decision about timing weighs likely benefit from preparation against cancer-related harm from delay. Name the team responsible for deciding whether new findings change the planned operation.
- 5At review, verify tolerance, intake, haemoglobin trend and functional progress. If the expected improvement has not occurred, investigate the reason and modify treatment rather than repeating the same instructions. Ensure postoperative nutrition and anaemia follow-up are included in the discharge plan.
02Alcohol dependenceAvoiding an unsafe preoperative stop instructionA patient scheduled for elective surgery reports daily heavy drinking and a previous withdrawal seizure.+
- 1Explain that reducing alcohol-related surgical risk is important but abrupt unsupported cessation may be hazardous. Establish current symptoms, last intake and the previous withdrawal course, and obtain specialist advice promptly.
- 2Arrange medically supported withdrawal in an appropriate setting if indicated, with assessment for thiamine deficiency and other complications. Drug choice and monitoring depend on severity, liver function and the supervised protocol rather than a fixed dose handed out without follow-up.
- 3Coordinate the operation date with the treatment plan. Document who will review withdrawal risk on admission and how the ward will respond if symptoms emerge; asking the patient simply to avoid alcohol on the morning of surgery is inadequate.
03Smoking supportTurning a recommendation into an achievable planA patient wants to stop smoking before an operation but previously relapsed during severe cravings.+
- 1Ask what happened during the previous attempt and which form of help the patient would accept. Offer a referral and discuss appropriate cessation treatment with the relevant clinician or service.
- 2Agree a concrete plan for access, follow-up and managing cravings during admission. Nicotine replacement may support many surgical patients, but some operations have specific precautions, so ensure the procedure’s instructions are checked rather than assuming every product suits every operation.
- 3Review progress without blame and continue support after discharge. A lapse identifies a need to adapt treatment or support; it is not proof that further perioperative preparation has no value.
05Relevant medicines and safetySpecific regimens and precautions when the skill involves prescribing.
Ferrous sulfate: guideline-based initial adult iron-deficiency treatment
BSG initial adult regimen: ferrous sulfate 200 mg orally once daily, providing about 65 mg elemental iron. If not tolerated, consider one tablet on alternate days or an alternative iron strategy. Check haemoglobin response within about 4 weeks; continue treatment for approximately 3 months after haemoglobin normalises to replenish stores, with review of cause and response. This lower-frequency guideline regimen differs from some product SmPC therapeutic schedules of 2–3 tablets daily.Review product contraindications, iron overload, gastrointestinal disease and swallowing or aspiration risk; do not use for anaemia without appropriate evidence of deficiency. Swallow the tablet whole with water, and separate interacting medicines according to their instructions. Discuss nausea, constipation and dark stools. Keep securely away from children because overdose can be fatal. Consider IV iron when oral therapy is ineffective, unsuitable or too slow for the clinical need.
06Feedback, follow-up and evidenceReview outcomes, seek feedback and identify what to improve.
- Recheck haemoglobin and treatment tolerance at a planned interval and investigate an inadequate response. Ongoing blood loss, poor absorption, inflammation, another deficiency or difficulty taking treatment may explain failure.
- Review nutritional intake, weight trajectory and function alongside laboratory findings. Monitor electrolytes and fluid balance more closely when refeeding risk or active nutrition support requires it.
- Follow up the smoking and alcohol plans with the patient and relevant services. Confirm that a referral resulted in accessible support and that the surgical team knows about dependence or withdrawal concerns.
- Continue optimisation after surgery through nutrition, rehabilitation, anaemia follow-up and cessation support. A preoperative intervention is less useful if the discharge plan immediately removes the resources needed to sustain it.
07Special situationsVariants, exceptions and circumstances that change the usual approach.
Iron deficiency needs a cause
Unexplained adult iron-deficiency anaemia may require gastrointestinal and other investigation according to age, history and risk. Improvement with iron supports iron-responsive anaemia but does not explain why iron was lost. Treating and investigating often proceed together rather than waiting for one to finish.
Transfusion is not nutritional replacement
Red-cell transfusion may be required for particular symptomatic, haemorrhagic or physiological circumstances, but it is not the default treatment for a stable preoperative iron deficiency. The decision depends on the whole clinical situation and the patient’s preferences, not a desire to achieve a normal laboratory range.
Severe nutritional risk needs a tailored start
NICE identifies combinations of low BMI, major weight loss, prolonged minimal intake and low electrolytes as refeeding concerns. A high-risk person requires specialist supervision, careful calorie advancement and appropriate vitamin and electrolyte provision. Avoid a generic high-calorie instruction without assessing that risk.
Optimisation must remain proportionate
An urgent operation may need to proceed while anaemia and nutrition are treated in parallel. Conversely, an elective procedure may allow time to address a major reversible problem. The relevant question is whether further preparation is likely to improve the person’s overall outcome enough to justify its delay.
08Common pitfallsFrequent interpretation and management errors.
- 01
Assuming that all preoperative anaemia is iron deficiency or that a normal ferritin excludes deficiency during inflammation.
- 02
Using BMI or albumin alone to conclude that a patient with recent weight loss has adequate nutritional reserve.
- 03
Telling an alcohol-dependent patient with previous severe withdrawal to stop abruptly without an assessed support plan.
- 04
Postponing surgery indefinitely for vague optimisation without naming the intervention, review point or expected benefit.