Avoid Surprises: 7 Common Errors in Pre-Surgical Assessment

• January 5, 2026
• By Fernando Amato

Negligence in pre-operative assessment can compromise surgical success — understand the 7 most frequent errors and how to avoid them.

When it comes to plastic surgery or any elective surgical procedure, the pre-operative assessment phase plays a determining role in its success and safety. A set of errors in pre-operative assessment can compromise not only the aesthetic or functional result, but also increase the risks of complications, delays, or cancellations. Therefore, it is fundamental that both the patient and the medical team are attentive, work together, and anticipate potential problems.

Thus, below, I present the seven most common errors in pre-operative assessment — each with its explanation, consequences, and prevention recommendations.

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⚠️ Error 1: Incomplete or superficial medical history

A pre-operative assessment should therefore include a complete medical history: previous diseases, medication use, allergies, smoking, alcohol consumption, coagulation disorders, anesthesia history, among others.

Therefore, when this step is neglected or superficial, the following risks arise:

• Surprises during anesthesia or intra-operatively (such as allergic reactions).
• Diseases not optimized (hypertension, diabetes, obesity).
• Lack of specific preparation (stopping anticoagulants, adapting medication).

Recommendation: Dialogue with your doctor or surgeon: inform everything — including continuous use medications, supplements, lifestyle habits. Confirm that the history has indeed been reviewed.

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⚠️ Error 2: Insufficiently comprehensive or inadequate physical examination

After the history, the physical examination should then assess the cardiovascular system, respiratory system, nutritional status, renal/hepatic function, airway (in case of general anesthesia), etc.

Common errors:

• Not assessing the airway (risk of difficult intubation).
• Ignoring signs of heart failure or hidden lung disease.
• Not recognizing frailty or malnutrition, which compromises recovery.

Recommendation: Ask if the surgeon or anesthesiologist has assessed these systems. Thus, if you have a history of “stair climbing fatigue,” “severe snoring,” “respiratory problems,” mention it explicitly.

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⚠️ Error 3: Unnecessary or poorly directed laboratory tests/exams

There are two problematic extremes: (a) ordering many unnecessary tests for a healthy patient — which generates false positives — and (b) failing to order relevant tests for a patient with comorbidities. However, recent studies show that many pre-operative tests are performed without adequate scientific justification.

Consequences:

• Additional costs.
• Falsely altered results, causing postponements.
• Lack of critical tests that would reveal increased risk.

Recommendation: Therefore, question whether the tests were “tailored” to your case, or standard routine. Healthy patients without comorbidities do not require a complete in-depth panel.

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⚠️ Error 4: Underestimation of physiological or functional risk

Assessing only “age” or “disease” is not enough: it is necessary to estimate functional capacity (for example: “can you climb two flights of stairs without stopping?”) and the risk load associated with the procedure.

Errors:

• “The patient seems fine, so everything will be smooth” — when there are unrecognized limitations.
• Not using indices or classifications that help predict complications.

Recommendation: Therefore, ask about tools used for risk (e.g., ASA scale, stress test, pulmonary assessment). Thus, if your functional capacity is reduced, consider prior optimization.

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⚠️ Error 5: Failure to optimize comorbidities before surgery

Having a disease such as diabetes, hypertension, obesity, renal or hepatic dysfunction requires optimization before incision.

Common error: scheduling surgery with unstable comorbidity. Result: increased risk, delayed healing, infections.

Recommendation: Therefore, verify that the doctor recommended adequate control of glycemia, blood pressure, organ functions — and if they considered postponing or adapting the surgery until these conditions are under control.

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⚠️ Error 6: Neglecting lifestyle factors and post-operative support

Pre-operative assessment is not limited to examinations. Aspects such as smoking, alcohol consumption, nutrition, family support, and adherence to post-operative care are crucial. Studies show that smoking, for example, alters healing, increases the risk of thrombosis.

Errors:

• Not advising cessation of tobacco use in advance.
• Ignoring excessive weight or malnutrition.
• Not assessing if the patient has support at home for post-operative care.

Recommendation: Explicitly ask about lifestyle preparation: quitting smoking, improving diet, mobility, family support. Confirm if the team discussed this.

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⚠️ Error 7: Lack of communication and complete informed consent

Pre-operative assessment also includes dialogue between the team and the patient — risks, benefits, alternatives, and what will be done in the surgical plan. If this is flawed, the patient may not be truly prepared.

Errors:

• The patient does not fully understand what is being proposed.
• The need for postponement if conditions are not optimized is not communicated.
• Lack of clarity about what happens intra- and post-operatively.

Recommendation: Request a consultation where all risks are explained, ask: “What if my blood pressure/glucose is not okay, what happens?” and ensure your consent is informed.

🧭 Conclusion & CTA

Pre-operative assessment is the foundation of a safe and satisfactory surgery. The “errors in pre-operative assessment” highlighted above are avoidable with preparation, dialogue, and attention.

If you are considering a procedure — whether Liposuction, Abdominoplasty, Mammoplasty or another — ensure your pre-operative assessment is complete.

👉 Schedule a consultation with your surgeon or anesthesiologist to carefully review each item of the assessment. Safety and outcome depend on this preparation.

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