Liposuction is a surgical procedure that removes subcutaneous fat with a cannula, and to undergo it safely, we need to objectively confirm through numerical data whether the body can tolerate surgery. That is exactly what liposuction pre-op tests are designed for. By combining blood work, an ECG, chest X-ray, and infectious disease screening, we comprehensively evaluate anemia, bleeding tendency, liver and kidney function, glycemic control, and infection status. This article explains what liposuction pre-op tests actually assess, how we respond when abnormal values appear, and which additional tests are added based on age and comorbidities, from the perspective of our supervising physician.

Key Points of This Article

・Liposuction pre-op tests are the cornerstone of safety, objectively confirming whether the body can withstand surgery

・Blood work checks anemia (Hb), coagulation (PT/APTT/platelets), liver and kidney function (AST/ALT/Cr/eGFR), glucose (HbA1c), and infectious diseases (HBV/HCV/HIV/syphilis)

・Abnormal values rarely mean immediate cancellation; most cases can be managed with follow-up tests, medication adjustment, or treatment

・Large-volume liposuction or general anesthesia cases also require ECG and chest X-ray

・Pre-op tests should ideally be completed 1 to 2 weeks before the surgery date

The Seven Domains Assessed in Liposuction Pre-Op Tests

Liposuction pre-op tests are broadly divided into the following seven domains.

1. Anemia screening (hemoglobin, hematocrit, red blood cell count)

2. Coagulation and bleeding tendency (platelet count, PT, APTT)

3. Liver function (AST, ALT, γ-GTP, albumin, total bilirubin)

4. Kidney function (BUN, creatinine, eGFR)

5. Glucose metabolism (fasting glucose, HbA1c)

6. Infectious disease screening (HBV, HCV, HIV, syphilis)

7. Inflammation and systemic status (CRP, white blood cell differential)

These are not simply routine checks but a comprehensive panel designed to predict what might occur intraoperatively and postoperatively. Understanding the meaning of each value allows patients to approach surgery with confidence.

The Medical Meaning of Each Blood Test Item

Anemia: Hemoglobin (Hb)

Even with tumescent anesthesia to reduce bleeding, total blood loss in large-volume liposuction can reach several hundred milliliters. Performing large-volume liposuction when hemoglobin is below 12 g/dL (female reference) leads to severe post-op fatigue, dizziness, and delayed recovery. At our clinic, patients with Hb below 11 g/dL are advised to undergo iron supplementation or to reduce the surgical area beforehand.

Coagulation: PT, APTT, and Platelets

A platelet count below 150,000/μL or PT-INR above 1.2 is considered a bleeding-prone state. Low-dose contraceptives, NSAIDs, fish oil supplements, vitamin E, and certain herbal products also promote bleeding, so they are evaluated together with pre-op medication guidance.

Liver Function: AST, ALT, γ-GTP

Reduced liver function delays metabolism of anesthetics and analgesics, leading to delayed emergence and severe post-op drowsiness. When AST/ALT exceeds twice the reference range, we prioritize identifying the cause and, if necessary, reschedule the surgery. Suspected fatty liver often improves with lifestyle guidance before surgery.

Kidney Function: Creatinine and eGFR

Lidocaine in tumescent anesthesia, post-op analgesics, and antibiotics are all renally excreted. Dose adjustments are needed when eGFR is below 60, and surgical eligibility itself must be reconsidered below 45.

Glucose Metabolism: HbA1c

When HbA1c exceeds 7.0%, wound healing delay and infection risk significantly increase. Performing liposuction with uncontrolled diabetes creates a breeding ground for post-op infection and skin necrosis.

Infectious Disease Screening

Hepatitis B, hepatitis C, HIV, and syphilis are always checked for staff needle-stick prevention and instrument management. A positive result does not directly disqualify surgery; it simply changes the infection control protocol.

What Happens When Liposuction Pre-Op Tests Show Abnormal Values

Abnormal pre-op test values do not automatically mean “you cannot have surgery.” In most cases, the following approaches allow surgery to proceed safely.

・Mild anemia: oral iron plus dietary guidance, retested in 2 to 4 weeks

・Mild liver dysfunction: often fatty liver or alcohol-related, most improve with lifestyle guidance

・HbA1c 6.5 to 7.0: coordinate with internal medicine, operate after glycemic control

・Mild renal impairment: suspect dehydration, provide hydration guidance and retest

However, the following conditions generally require postponement or internal medicine workup, prioritizing safety.

・Moderate anemia with Hb below 10 g/dL

・Untreated diabetes with HbA1c 8.0% or higher

・Platelet count below 100,000/μL

・Signs of acute infection (elevated CRP, fever)

Additional Tests by Age and Comorbidity

For patients aged 40 or older, or for large-volume liposuction and general anesthesia cases, we add the following.

・ECG: screening for arrhythmia and ischemic heart disease

・Chest X-ray: evaluation of pulmonary disease and cardiac enlargement

・Echocardiogram (if indicated by history): quantitative cardiac function assessment

For patients with a history of thyroid disease, we add thyroid function (TSH, FT4), and for those with a history of deep vein thrombosis, D-dimer and lower limb venous ultrasound. Flexibly combining necessary tests based on individual systemic status is essential.

When to Have Liposuction Pre-Op Tests

Pre-op tests are ideally completed 1 to 2 weeks before the scheduled surgery date. There are three reasons for this.

・It provides time for retesting or treatment if abnormal values appear

・Medication adjustment (washout) can be done with adequate lead time

・Pre-op counseling can discuss risks based on actual numerical data

Same-day blood work and same-day surgery narrow the response window if issues arise, so our clinic requires pre-op testing in advance as a rule. Safe liposuction begins with pre-op preparation, not on the day of surgery.

For safety standards in aesthetic surgery, please also refer to the Japan Society of Aesthetic Surgery. For related topics, see our liposuction column archive.

Frequently Asked Questions

Q. Are liposuction pre-op tests always required?

Yes. At our clinic, blood work and infectious disease screening are required for every patient undergoing liposuction. This is the minimum preparation for safe surgery and cannot be omitted.

Q. Can I use blood test results from my regular doctor?

Results from within the past 3 months can be used as reference. However, coagulation and infectious disease items specific to liposuction will be collected additionally at our clinic.

Q. I’ve been told I have mild anemia. Can I still have surgery?

Surgery is generally possible with Hb of 11 g/dL or higher, but for large-volume liposuction, we recommend prior iron supplementation. Below 10 g/dL, we typically reschedule after treatment by an internist.

Q. How long do test results take?

General blood work results are available the same day or the next day, and infectious disease results take 3 to 5 days. If abnormalities are found, we contact you individually and adjust the surgery schedule.

Q. Is there a fee for pre-op tests?

For patients contracted for liposuction or breast augmentation at our clinic, the cost of pre-op tests is included in the procedure fee. Please confirm the details during your consultation.

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Supervising Physician: Shin Moriwaki, MD

Member of the Japan Society of Aesthetic Surgery (JSAS)

Member of the American Academy of Aesthetic Medicine

ECFMG Certificate (US Medical Licensing Qualification)

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📍AVAN TOKYO GINZA LIPOSUCTION CLINIC

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