Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.
Preoperative optimisation for major joint surgery
Musculoskeletal medicine and orthopaedics · UK scope · Sources checked 27 Aug 2026 · Clinical review pending
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Do not route acute deterioration through elective optimisation
New chest pain, decompensated heart failure, severe infection, diabetic emergency, acute kidney injury or a threatened limb needs urgent clinical assessment rather than routine pre-assessment completion.
Action: Stabilise the acute problem, alert the responsible medical and surgical teams and reconsider timing only after immediate risk and the consequences of delay have been assessed.
Role and principles
Build a proportionate preoperative plan that improves physiological reserve, treats modifiable disease and supports informed joint-surgery decisions without creating harmful or arbitrary delay.
Preoperative optimisation is a longitudinal clinical process, not clearance by a single test. Confirm the indication, symptom burden, radiographic disease, previous non-operative care and what the patient wants surgery to achieve. Record walking distance, stairs, aids, work and caring responsibilities, previous anaesthesia, allergies and transfusion concerns. Estimate frailty and functional capacity and ask whether breathlessness, chest discomfort or fatigue reflects deconditioning or active disease. Explain that optimisation lowers avoidable risk but cannot make major surgery risk-free.
Review cardiovascular, respiratory, renal, hepatic, neurological and endocrine disease alongside sleep apnoea, previous VTE, bleeding, infection, dental symptoms, chronic pain, cognition, mood and substance use. Reconcile prescribed, over-the-counter and complementary medicines. Examine vital signs, hydration, airway-relevant features, heart and lungs, skin around the operative limb and current mobility. A standardised risk tool can structure discussion, but it supplements rather than replaces clinical judgement or the patient's priorities.
Assessment and patient selection
Low physiological reserve
Slow gait, exhaustion, dependence in daily activities and limited functional capacity predict a harder recovery even when resting observations are normal.
Treatable perioperative anaemia
Low haemoglobin with iron deficiency, renal disease, inflammation or occult loss identifies a modifiable risk and a cause needing ownership.
Poorly controlled diabetes
A high recent HbA1c, frequent hypoglycaemia or acute metabolic symptoms signals need for a safe diabetes and perioperative medicine plan.
Unstable cardiopulmonary disease
New symptoms, recent exacerbation, fluid overload or exertional syncope suggests active disease rather than expected osteoarthritis-related inactivity.
Nutritional vulnerability
Unintentional weight loss, reduced intake, low muscle mass or difficulty obtaining food can impair healing regardless of body mass index.
Discharge mismatch
Stairs, unavailable carers, inaccessible washing facilities or inability to use aids can defeat an otherwise technically successful pathway.
Red flags requiring action
Rest chest pain, syncope on exertion, new pulmonary oedema or an unstable arrhythmia requires urgent cardiovascular assessment before elective anaesthesia.
Fever, spreading cellulitis, an infected ulcer or active infection near the planned joint raises prosthetic infection risk and needs prompt diagnosis and treatment.
Baseline assessment
01First-line targeted history, examination and risk assessmentFirst stepFirst line
Why
Identify active disease, frailty, functional limitation, airway and social factors that can change anaesthesia, surgery or recovery.
Interpretation and limitations
Escalate unstable symptoms immediately; use formal risk estimates to support a shared discussion, not as a stand-alone permission score.
02NICE NG45 selected preoperative tests
Why
Match FBC, renal testing, ECG and other investigations to surgery grade, age and relevant comorbidity.
Interpretation and limitations
A normal bundle cannot compensate for missed symptoms, while an incidental abnormality should be interpreted before it triggers delay.
03Anaemia and iron assessment
Why
Classify low haemoglobin and distinguish absolute iron deficiency, inflammation, renal disease, B12 or folate deficiency and blood loss.
Interpretation and limitations
Ferritin may be misleadingly normal during inflammation, so interpret it with transferrin saturation, indices, CRP and the clinical context.
04Recent HbA1c with glucose safety review
Why
Assess longer-term glycaemia and identify need for diabetes optimisation and a perioperative medicines plan.
Interpretation and limitations
HbA1c above 69 mmol/mol supports referral for optimisation when feasible, but does not by itself define metabolic stability or mandate cancellation.
Interventions
01At referralStart preparation earlyFirst stepMajor hip, knee or shoulder joint surgery is being considered.+
1Confirm indication, alternatives, expected benefit and the outcomes that matter to the patient.
2Assess frailty, function, comorbidities, medicines, anaemia risk, diabetes, nutrition, smoking, alcohol and home circumstances.
3Begin exercise, nutritional and lifestyle support within safe joint limits and refer promptly for treatable abnormalities.
4Give a named contact and timeline so optimisation proceeds alongside surgical planning rather than after listing.
02Pre-assessmentResolve actionable riskFormal anaesthetic and surgical assessment identifies an abnormal symptom, test or support need.+
1Define the clinical question and whether the finding represents immediate instability, a modifiable risk or an incidental result.
Targets, monitoring and follow-up
Track whether every abnormal result has a named owner, clinical interpretation, action and planned recheck rather than merely appearing in the record.
Repeat haemoglobin and relevant iron markers after treatment at a clinically useful interval before the planned operation.
Review glucose patterns and hypoglycaemia as well as HbA1c, and confirm written perioperative diabetes instructions close to surgery.
Reassess new chest, respiratory, infectious or thrombotic symptoms because fitness can change after the original assessment.
Measure preparation through function, nutrition, smoking or alcohol goals and patient confidence, not through attendance alone.
Confirm transport, equipment, carers and community follow-up before admission and update the plan if the home situation changes.
Special situations
Optimisation begins before listing
Starting at referral creates time to treat anaemia, improve reserve and make a less pressured decision about surgery.
One threshold is not clearance
BMI, HbA1c or age cannot capture frailty, urgency, expected benefit and the harm caused by postponement.
Normal tests do not prove fitness
History, examination and functional trajectory can reveal unstable disease that routine panels and resting observations miss.
High BMI can hide malnutrition
Low protein intake and sarcopenia may coexist with obesity and still impair mobility, wound healing and recovery.
Delay needs an endpoint
A defensible postponement names the modifiable problem, intervention, responsible service and date for renewed decision making.
Common pitfalls
01
Waiting until the week before surgery to identify anaemia, poor glycaemic control or an inaccessible discharge environment.
02
Ordering every available test without a clinical question or a plan for handling incidental abnormalities.
03
Treating an HbA1c or BMI cut-off as an automatic national cancellation rule.
04
Stopping anticoagulants, steroids, insulin or other high-risk medicines without a coordinated interruption and restart plan.
05
Equating lack of exercise from joint pain with cardiac disease without assessing both possibilities.
06
Promising risk elimination rather than explaining residual uncertainty and the patient's alternatives.
Practice
Two practice questions
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Question 1 of 2
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Musculoskeletal medicine and orthopaedicsOriginal SBA
Actionable anaemia before arthroplasty
A patient is listed for knee replacement in ten weeks and pre-assessment identifies anaemia with low ferritin. They are haemodynamically stable and have no acute bleeding. What is the best next approach?
Sources and review status5 sources · checked 27 Aug 2026 · clinical review pending+
Sources
Sources and review status
National guidance is shown before implementation-dependent detail. Apply principles in context and verify current guidance when a decision affects care. Source check completed 27 Aug 2026; clinical approval remains outstanding.
Order tests selectively under NICE NG45 and local anaesthetic pathways. FBC detects anaemia; renal profile informs kidney risk and medicine handling; ECG is useful when age, comorbidity and surgery grade indicate it. Add ferritin and transferrin saturation when anaemia or iron deficiency is plausible, HbA1c for diabetes if no suitable recent result, and other tests only for a clinical question. Abnormal results require ownership, interpretation and a documented action; repeating them without treating the cause is not optimisation.
Treat modifiable risk in parallel. Anaemia needs classification and cause-directed therapy. Improve inhaler technique and manage an exacerbation before surgery; support smoking cessation rather than simply recording smoking. Address malnutrition and unintentional weight loss even when BMI is high. Encourage achievable aerobic, resistance and functional practice that does not aggravate joint injury. Plan postoperative analgesia early in people taking opioids, and involve geriatric, diabetes, haematology, cardiology or renal teams when specialist decisions can change outcome.
The final plan specifies whether the patient is ready, what remains to be completed, who owns each action and which findings would alter timing. Include fasting and medicine instructions, anticipated anaesthetic technique, blood conservation, VTE prevention, mobilisation and discharge support. Avoid blanket thresholds for BMI, age or HbA1c detached from individual benefit and risk. If postponement is proposed, give a defined optimisation goal, treatment route and review date so delay does not become indefinite exclusion.
Key points
Begin optimisation when referral for joint replacement is made, because anaemia treatment, smoking cessation, conditioning and shared decisions need weeks rather than a final-day checklist.
First-line assessment combines procedure risk with frailty, functional capacity, comorbidity, medicines, nutrition, cognition, social support and the patient's goals and acceptable trade-offs.
Use NICE NG45 to select preoperative tests by operation grade and comorbidity; routine panels in every patient create false positives without replacing history and examination.
Identify and investigate anaemia early, including iron studies where indicated; choose oral or intravenous iron from cause, severity and time available rather than treating the haemoglobin value alone.
For diabetes, obtain a recent HbA1c and aim for optimisation below 69 mmol/mol when safely achievable, but use individual risk and urgency rather than an automatic cancellation rule.
Offer practical preparation: progressive activity within joint limits, adequate protein and energy intake, weight-management support, smoking cessation and alcohol moderation without shaming or withholding care.
Create an explicit perioperative medicine plan for anticoagulants, antiplatelets, insulin, SGLT2 inhibitors, steroids and other high-risk drugs, coordinated with anaesthesia and prescribers.
Severe symptomatic anaemia, ongoing blood loss or unexplained cytopenia needs cause-directed investigation rather than transfusion or iron prescribed without a diagnosis.
Polyuria, vomiting, ketones, severe hyperglycaemia or recurrent hypoglycaemia may represent diabetic decompensation and must be managed before routine surgery planning.
A painful swollen calf, unexplained hypoxia or pleuritic chest pain before surgery requires an urgent venous-thromboembolism pathway, not reassurance from an upcoming operation.
Rapid loss of function, rest pain, destructive radiographic change or systemic illness should trigger reconsideration of infection, fracture or malignancy rather than routine arthroplasty scheduling.
05Additional cardiopulmonary testing
Why
Answer a specific question raised by symptoms, examination or known disease rather than screen every arthroplasty candidate.
Interpretation and limitations
Echocardiography, ambulatory testing or specialist functional assessment is useful only when the result is likely to change treatment, monitoring or timing.
2
Assign cause-directed treatment and specialist input with a responsible clinician and review date.
3Reconcile medicines and write exact continuation, interruption and restart instructions for high-risk drugs.
4Agree blood conservation, analgesia, VTE, mobilisation and discharge elements with the multidisciplinary team.
03Timing decisionBalance readiness against delayResidual risk remains near the planned operation date.+
1Compare the probability and consequence of proceeding with the likely benefit from a defined period of optimisation.
2Discuss options in accessible language, including proceeding with adaptations, a time-limited deferral or continued non-operative care.
3If deferring, specify the target, intervention, owner and reassessment date instead of creating an open-ended barrier.
4Document the shared decision and communicate it to the patient, GP, anaesthetist, surgeon and relevant services.
JurisdictionUnited Kingdom
Proceed, defer or choose non-operative care through shared decision making that compares expected benefit, residual symptoms, personalised complication risk and the harm of further delay.