Routine pre-operative tests for elective surgery: a caregiver’s guide in Singapore

What is each pre-operative test meant to assess?

Before an elective operation, each proposed test has a specific purpose in the pre-operative discussion. A caregiver can keep the test name, the operation, and the relevant health detail linked to that purpose.

ASA physical status is the health classification used in the NICE testing table for surgical planning. The table places different tests beside the type of operation and ASA grade, which gives the care team a structure for deciding what may be relevant.

ASA grade is only one part of the discussion. The NICE table also changes by the type of operation, so the same proposed test can sit in a different context for minor surgery or another procedure. Keeping the planned operation, ASA grade, and reason for the test together gives the discussion a clearer frame.

The discussion also depends on specific conditions and findings. NICE recommendations link some tests to diabetes, kidney injury risk, the possible effect of a urinary tract infection on operating, and cardiac symptoms.

A test record can also capture the condition attached to a recommendation. NICE says urine dipstick tests shouldn’t be offered routinely before surgery; microscopy and culture may be considered if a urinary tract infection would influence the decision to operate. Chest X-rays and resting echocardiography shouldn’t be offered routinely, while echocardiography may be considered for a heart murmur with a cardiac symptom or signs or symptoms of heart failure. Before ordering it, the care team should carry out a resting ECG and discuss the findings with an anaesthetist.

We support routine assessments for older adults in primary and community care settings, giving the pre-operative discussion a place for objective assessment alongside the proposed tests.

Which routine tests might the team consider?

For minor surgery, the NICE table says full blood count, haemostasis, and lung function or arterial blood gas tests are not routinely recommended for ASA 1, ASA 2, or ASA 3 or ASA 4. That wording applies to the minor-surgery categories shown in the table.

The minor-surgery row is a useful example of how the table should be read. It groups several tests together, then separates kidney function and ECG into conditional entries for particular ASA grades and circumstances. The table therefore gives both a boundary around routine testing and prompts for focused review.

The same recommendations describe several condition-based options:

• Kidney function testing may be considered for ASA 3 or ASA 4 when there is a risk of acute kidney injury.
• An ECG may be considered for ASA 3 or ASA 4 when no ECG result is available from the past 12 months.
• People with diabetes may be offered HbA1c testing when they have not been tested in the last 3 months.

Urine dipstick tests should not be offered routinely before surgery, according to the NICE recommendation text. Microscopy and culture of a midstream urine sample may be considered when a urinary tract infection would influence the decision to operate.

Chest X-rays should not be offered routinely before surgery. This gives the care team a specific reason to discuss if a chest image is proposed for your loved one’s operation.

Resting echocardiography should not be offered routinely before surgery. NICE says it may be considered when a heart murmur occurs with a cardiac symptom, or when there are signs or symptoms of heart failure; before ordering it, the care team carries out a resting ECG and discusses the findings with an anaesthetist.

The sequence shows why a proposed echocardiogram may sit within a wider review rather than stand alone. The question moves from the symptom or finding, to the resting ECG, to discussion with an anaesthetist before echocardiography is considered. Each stage keeps the cardiac concern connected to the planned operation.

A caregiver can ask what will be recorded before surgery and how the record will relate to later reviews.

Existing results can also change the starting point of the discussion. The NICE examples use recency as one factor for an ECG and HbA1c, so the record of when a result was obtained belongs beside the result itself. That detail helps the team decide whether the information still answers the current question.

What does the evidence say about testing?

The NICE guideline and evidence review support a question-led discussion about testing. The planned operation, ASA grade, symptoms, and relevant health conditions help determine whether a result has a defined place in surgical planning.

The two NICE sources play different roles here. The recommendation table shows how tests are categorized for operations and ASA grades, while the evidence review examines whether haemostasis testing has been linked to health outcomes. Reading them together separates a recommendation from the strength of direct outcome evidence.

The NICE evidence review found no direct evidence that preoperative haemostasis tests would or would not improve health outcomes. Haemostasis tests may still appear in an individual discussion, yet the test itself does not establish that health outcomes will improve.

The same evidence review found more abnormal haemostasis tests with greater comorbidity, measured by ASA grade. The review also said that this finding did not show that testing improves health outcomes, so the result needs to be considered with the wider clinical picture.

For a caregiver, the practical point is to connect each test with a decision. Questions can cover what the team is checking, which finding would change the surgical pathway, and whether an existing result is recent enough for the planned operation.

How can pre-operative assessment establish a recovery baseline?

Pre-operative assessment can begin weeks before surgery. In the NICE 2020 review of preoperative optimisation clinics for older adults, clinics usually assessed people weeks in advance and were generally staffed by dedicated nurses supported by anaesthetists, with occasional involvement from other allied health professionals. The review says admission the night before surgery had become infrequent.

The timing matters because it creates space for more than one conversation. A clinic weeks before surgery can bring together the planned operation, health findings, shared decisions, and an individualised perioperative plan before later recovery reviews begin. The NICE review presents this broader role alongside the staffing model.

The NICE review describes preoperative assessment as more than checking whether someone is fit for surgery. It can also support shared decision making and an individualised perioperative plan.

A baseline can be understood as part of a simple assessment sequence:

• Record the starting point before surgery.
• Review the person after surgery.
• Compare later results with the earlier reference point.
• Use the pattern of results in the wider care discussion.

We provide longitudinal insights by comparing results from before surgery through each stage of recovery. This places a later result in the sequence of assessments, giving the care team more context than a single post-operative measurement viewed on its own.

Longitudinal comparison is useful when the question changes over time. Before surgery, the focus is the starting point; during recovery, the focus is the direction of change; near discharge, the focus is how the current assessment fits the next stage of care. The same record can support each conversation.

We aid discharge planning for hospitals. A pre-operative baseline can therefore remain part of the record as the team discusses recovery progress and the needs linked to discharge.

What should caregivers ask about mobility, falls, and frailty?

The CDC STEADI resource states that more than one out of four people aged 65 and older fall each year, and more than 3 million receive emergency-department treatment annually for fall injuries. Those figures come from a United States resource and provide population context, not a prediction for your loved one.

Frailty assessment can also form part of surgical planning. A British Geriatrics Society surgical-unit project trained triage staff over a week to calculate and record the Clinical Frailty Scale electronically for all people aged 65 and over presenting to the unit.

Frailty assessment and fall risk assessment can appear together while answering different questions. The surgical-unit project recorded Clinical Frailty Scale scores, while CDC STEADI sets out a separate fall-risk process with screening, assessment, and intervention. Keeping the terms distinct helps a caregiver follow which part of the pathway each discussion addresses.

Questions for the care team can keep the discussion concrete:

• What mobility baseline will be recorded before surgery?
• Does a fall risk assessment form part of the review, and what follows screening?
• Does a frailty assessment apply, and where will the result be recorded?
• If orthopaedic care or neurological rehabilitation is part of the pathway, who coordinates it?
• What patient support may be relevant during recovery and discharge?

Questions about support can be tied to a recorded finding. A mobility baseline can be discussed with recovery monitoring, a fall risk assessment with the STEADI sequence, and a frailty assessment with the Clinical Frailty Scale record. This gives each question a defined place without treating the measures as interchangeable.

We are used in hospitals and rehabilitation for assessments during recovery and before discharge, giving care teams a way to keep assessment connected as the setting changes.

How should caregivers connect test results to follow-up?

This connects the pre-operative record with later reviews, so the follow-up conversation has a clear starting point.

A caregiver’s notes can record the date of each review and the question being considered.

We are used in hospitals and rehabilitation for assessments during recovery and before discharge. When care moves between settings, a simple record of the baseline, later review, and follow-up question can help keep the conversation focused.

When should a caregiver ask for further professional evaluation?

Further professional evaluation may enter the discussion when a heart murmur appears with a cardiac symptom, or when there are signs or symptoms of heart failure. These are the specific situations named in the NICE recommendation for considering resting echocardiography.

Before ordering resting echocardiography in those situations, the care team carries out a resting ECG and discusses the findings with an anaesthetist. This sequence links the symptom or finding to the next clinical review without treating echocardiography as a routine test.

Our assessments in hospitals and rehabilitation support review during recovery and before discharge. That work can sit alongside professional evaluation of cardiac findings, with each part of the pathway addressing its own care question.

What is the next step before elective surgery?

A qualified professional decides which tests and assessments suit your loved one’s situation. The recommendations provide decision points, while the surgical care team applies them to the planned operation and the findings from the individual assessment.

We support assessment before and after surgery and allow care teams to review objective measurements across assessments to track progress and plan care.

What questions should you take to the surgical team?

Can recent test results change which pre-operative tests are considered?

Yes. The care team may consider how recent an existing result is. NICE says an ECG may be considered for some people having minor surgery when no result is available from the past 12 months, while people with diabetes may be offered HbA1c testing if they haven’t been tested in the last 3 months. The planned operation, health history, symptoms, and clinical assessment still guide the decision.

Why discuss mobility and frailty when the main concern is routine testing?

Blood, urine, and cardiac tests answer different questions from a mobility, fall risk assessment, or frailty assessment. A pre-operative assessment can record a functional baseline alongside those tests, helping the team discuss post-operative recovery, patient support, rehabilitation, and discharge needs. The findings support the wider clinical discussion and don’t predict an individual outcome.

What information can a caregiver prepare for the pre-operative discussion?

A short record can include the planned operation, known symptoms and health conditions, recent test dates, current mobility, any previous falls, and questions about frailty assessment and follow-up. It can also note who will review each result, what decision it may inform, and when recovery will be reassessed. In Singapore, the surgical care team decides which tests and assessments apply to the individual.