Medical Requirements for Limb Lengthening Surgery

What This Guide Covers

Before any limb lengthening surgery at Heights Plus, every patient undergoes a structured medical clearance process — a comprehensive set of investigations, health evaluations, and pre-surgical preparations. These are not administrative formalities. Each requirement exists because bone regeneration, surgical safety, and rehabilitation success depend directly on your health status going into the operation. This guide explains every medical requirement in detail — why it exists, what the test involves, what values we need, and what happens if a result falls outside the required range.

1. Why Medical Requirements Exist — The Clinical Logic

Limb lengthening surgery is not a minor procedure. It involves controlled bone division, a multi-month distraction process, extensive soft-tissue adaptation, and a lengthy rehabilitation phase. The body's ability to execute every one of these stages safely and successfully depends entirely on its underlying medical state.

A technically perfect surgery can still produce a poor outcome if the patient's bone density is inadequate, their blood sugar is uncontrolled, their Vitamin D is deficient, or their cardiovascular system cannot safely withstand a major anaesthetic. Medical requirements are therefore not bureaucratic hurdles — they are the clinical foundation on which surgical safety and outcome quality are built.

At Heights Plus, we invest significant time and expertise in the pre-surgical medical evaluation. We would rather delay a surgery by 8 weeks to correct a Vitamin D deficiency than proceed with a compromised patient and face a preventable complication. Every requirement described in this guide is grounded in surgical evidence and patient safety.

How the Medical Clearance Process Works at Heights Plus

Step 1 — Initial Consultation: Clinical history, goal discussion, preliminary physical assessment.

Step 2 — Radiological Assessment: X-rays and imaging to evaluate bone structure, alignment, and growth plates.

Step 3 — Laboratory Investigations: Comprehensive blood and urine tests across multiple body systems.

Step 4 — Specialist Referrals (if needed): Cardiology, endocrinology, haematology, or other specialists for complex cases.

Step 5 — Pre-Surgical Optimisation: Correcting any deficiencies or conditions identified — typically 6–12 weeks.

Step 6 — Anaesthesia Assessment: Evaluation by our anaesthesiologist for surgical risk clearance.

Step 7 — Surgical Clearance Confirmation: Final review of all investigations before surgery is scheduled.

No patient proceeds to surgery until ALL clearance criteria are met. This is non-negotiable at Heights Plus.

2. Radiological Requirements — What Imaging Is Needed

Imaging is the single most important diagnostic category in limb lengthening assessment. It directly determines surgical planning, confirms eligibility, and establishes the baseline against which all subsequent X-rays during recovery are compared.

Full-Length Standing Lower Limb X-Ray (Teleoroentgenogram)

Purpose: Measures the exact length of both femurs and tibias from hip to ankle in full standing weight-bearing position. Identifies leg length discrepancy (LLD), limb alignment (varus/valgus angulation), and overall skeletal proportions. This is the primary planning X-ray for every limb lengthening case.

When tested: Before consultation; repeated during recovery every 2–4 weeks to monitor bone formation.

Target values: Both legs measured; LLD documented in millimetres; alignment within acceptable parameters.

If abnormal: LLD identified — guides which limb to lengthen and by how much. Malalignment may require correction before or alongside lengthening.

Growth Plate Assessment X-Ray (Wrist, Knee, or Ankle)

Purpose: Assesses whether the growth plates at the ends of the long bones are fully fused. Open growth plates are an absolute contraindication to limb lengthening — operating on open plates risks permanent growth damage and angular deformity.

When tested: At initial assessment, before any surgical planning begins — mandatory for all patients.

Target values: Complete growth plate fusion confirmed on X-ray — no visible growth plate line at the epiphysis.

If abnormal: Open plates = surgery cannot proceed until fully closed. Patient advised to return after closure (typically age 18–21 in males, 16–18 in females).

MRI of the Surgical Limb (Femur or Tibia)

Purpose: Provides detailed soft-tissue imaging of the target bone and surrounding structures — muscles, tendons, nerves, blood vessels, and bone marrow. Identifies pre-existing bone marrow abnormalities, stress fractures, tumours, avascular necrosis, or joint pathology that could complicate or contraindicate surgery.

When tested: In selected cases — particularly those with atypical symptoms, previous injury, or suspected intra-medullary pathology.

Target values: No bone marrow abnormality, tumour, or significant joint pathology in the surgical segment.

If abnormal: Abnormalities found — require specialist evaluation before proceeding. May modify surgical approach or timeline.

DEXA Scan — Bone Density Assessment

Purpose: Dual-Energy X-ray Absorptiometry (DEXA) measures bone mineral density (BMD) at the lumbar spine and femoral neck. Low bone density compromises the quality of new bone formed in the distraction gap, increasing risk of non-union, stress fractures, and device failure.

When tested: Mandatory for patients over 35; patients with risk factors for low BMD; patients with low body weight.

Target values: T-score above -1.0 (normal); T-score -1.0 to -2.5 (osteopenia — manageable with supplementation); T-score below -2.5 (osteoporosis — surgery is high risk, medical optimisation required first).

If abnormal: Osteopenia: Vitamin D, calcium, and bone-building supplements prescribed; reassessment in 3–6 months. Osteoporosis: Surgery typically delayed until BMD is improved; specialist endocrinology input required.

CT Scan of Surgical Segment (Selected Cases)

Purpose: Provides three-dimensional bone anatomy when plain X-rays are insufficient — particularly useful in complex deformity cases, post-traumatic cases with abnormal bone healing, or cases where a previous intramedullary implant needs assessment before planning the new nail placement.

When tested: In complex cases — previous fracture, deformity, or planned two-segment lengthening. Not routinely required for standard cosmetic cases.

Target values: Clear 3D bone anatomy for surgical planning; no unexpected pathology.

If abnormal: Complex anatomy identified — surgical plan adapted accordingly; may require additional specialist input or modified technique.

3. Blood Test Requirements — The Complete Laboratory Panel

A comprehensive blood panel is the backbone of the medical clearance process. These investigations assess bone health, metabolic status, haematological fitness, endocrine function, infection risk, and anaesthetic safety — all in one systematic sweep.

A. Bone Health Investigations

Vitamin D (25-OH Vitamin D)

Purpose: The single most important modifiable blood test for limb lengthening success. Vitamin D is essential for calcium absorption and bone mineralisation — the process by which the new bone in the distraction gap hardens into solid cortical bone. Severe deficiency directly impairs callus mineralisation, causing the new bone to remain weak and prone to fracture.

When tested: Pre-surgery; repeated at 3 months and 6 months during recovery.

Target values: Above 40 ng/mL (100 nmol/L) before surgery. Optimal: 50–70 ng/mL. Deficiency in Indian patients is extremely common — studies show 60–80% of urban Indians are below optimal levels.

If abnormal: High-dose supplementation protocol prescribed (typically 60,000 IU weekly for 8–12 weeks, then maintenance). Surgery delayed until levels are corrected. This is one of the most common reasons for a pre-surgical optimisation period.

Serum Calcium and Phosphorus

Purpose: Calcium is the primary mineral in bone. Phosphorus works alongside calcium in bone mineralisation. Together, they determine the mineral content of the new bone being formed. Abnormal levels suggest underlying metabolic bone disease, hypoparathyroidism, or renal disease that must be evaluated.

When tested: Pre-surgery; monitored during recovery.

Target values: Calcium: 8.5–10.5 mg/dL. Phosphorus: 2.5–4.5 mg/dL.

If abnormal: Specialist endocrinology or nephrology evaluation. Cause identified and treated before surgery proceeds.

Serum Magnesium

Purpose: Magnesium is a cofactor in over 300 enzymatic reactions involved in bone metabolism, muscle function, and nerve signalling — all heavily active during limb lengthening recovery. Magnesium deficiency worsens muscle cramps, nerve sensitivity, and impairs insulin function.

When tested: Pre-surgery.

Target values: 1.7–2.4 mg/dL.

If abnormal: Oral magnesium supplementation prescribed pre-surgery and maintained throughout recovery.

Bone Turnover Markers (CTX, P1NP)

Purpose: CTX measures bone resorption rate. P1NP measures bone formation rate. Together, they give a dynamic picture of how actively bones are being remodelled — important for assessing the likely quality and speed of new bone formation in the distraction gap.

When tested: In selected cases — particularly older patients, those with suspected metabolic bone disease, or patients with previously abnormal bone density.

Target values: Within age-appropriate reference ranges; no markedly elevated resorption.

If abnormal: Significantly elevated CTX: underlying cause investigated. Bisphosphonate therapy may be considered in specific cases to reduce excess bone loss.

B. Metabolic and Endocrine Investigations

Fasting Blood Glucose and HbA1c

Purpose: HbA1c reflects average blood glucose over the past 3 months — a far more reliable indicator of diabetic control than a single fasting glucose reading. Elevated blood sugar impairs every aspect of surgical healing: bone regeneration, wound healing, pin-site healing, nerve recovery, and immune function. Even patients who do not know they are diabetic may have undiagnosed pre-diabetes revealed by this test.

When tested: Pre-surgery (mandatory); repeated at 3-monthly intervals during recovery if diabetic or pre-diabetic.

Target values: Fasting glucose: below 100 mg/dL (normal); 100–125 mg/dL (pre-diabetes). HbA1c: below 5.7% (normal); below 8.0% required to proceed with surgery (ideally below 7.0%).

If abnormal: Pre-diabetes: dietary modification, exercise programme, and repeat testing after 8–12 weeks. Diabetes above HbA1c 8%: surgery delayed until controlled. Patients with well-controlled diabetes (HbA1c below 8%) proceed with enhanced monitoring and wound care protocols.

Thyroid Function Panel (TSH, Free T3, Free T4)

Purpose: Thyroid hormones govern metabolic rate, bone turnover, wound healing, and calcium metabolism. Hypothyroidism slows bone healing and causes fatigue. Hyperthyroidism accelerates bone resorption, reduces bone density, and increases surgical risk. Thyroid autoimmunity (Hashimoto's thyroiditis) is extremely prevalent in Indian women and requires specific assessment.

When tested: Pre-surgery; TSH rechecked at 6 months during recovery.

Target values: TSH: 0.4–4.0 mIU/L (for surgery, TSH within 0.5–3.0 mIU/L preferred). Free T3 and T4 within normal range.

If abnormal: Hypothyroidism: Levothyroxine prescribed; TSH normalised before surgery (typically 6–8 weeks). Hyperthyroidism: treated and controlled before surgery.

Fasting Insulin and HOMA-IR (Insulin Resistance Index)

Purpose: Insulin resistance is extremely common in India (affecting up to 30–40% of urban adults) and significantly impairs bone metabolism, wound healing, and the inflammatory response after surgery. Even patients with normal blood sugar can have significant insulin resistance.

When tested: Pre-surgery, particularly in patients with PCOS, abdominal obesity, or metabolic syndrome features.

Target values: Fasting insulin: below 25 mIU/L. HOMA-IR: below 2.5.

If abnormal: Dietary intervention (low-glycaemic diet), exercise programme, Metformin in selected cases. Reassessment before surgery.

Lipid Profile (Total Cholesterol, LDL, HDL, Triglycerides)

Purpose: Cardiovascular risk assessment for anaesthetic safety. Severely elevated triglycerides indicate metabolic syndrome which is associated with impaired microvascular blood supply to bone — critical for distraction osteogenesis.

When tested: Pre-surgery (mandatory); part of overall cardiovascular risk assessment.

Target values: Total cholesterol: below 200 mg/dL. LDL: below 130 mg/dL. HDL: above 40 mg/dL (men), above 50 mg/dL (women). Triglycerides: below 150 mg/dL.

If abnormal: Dietary modification, statin or fibrate therapy if indicated. Addressed before surgery.

C. Haematological Investigations

Full Blood Count (FBC) — Haemoglobin, WBC, Platelets

Purpose: Haemoglobin measures oxygen-carrying capacity — essential for tissue healing and for tolerating surgical blood loss safely. WBC screens for active infection or immune suppression. Platelet count is critical for blood clotting during and after surgery. Anaemia is extremely common in Indian women and must be corrected before elective surgery.

When tested: Pre-surgery (mandatory); repeated before surgery if levels were low.

Target values: Haemoglobin: above 12.0 g/dL (women), above 13.0 g/dL (men). WBC: 4.0–11.0 x10⁹/L. Platelets: 150–400 x10⁹/L.

If abnormal: Anaemia: iron studies and B12/folate checked; supplementation as required; surgery delayed until Hb is above target. Leucocytosis (high WBC): infection screen performed — active infection is a contraindication to elective surgery.

Iron Studies (Serum Iron, TIBC, Ferritin)

Purpose: Identifies the type and cause of anaemia. Iron deficiency anaemia is the most common nutritional deficiency in India, especially in women of reproductive age. Iron is required for haemoglobin synthesis and plays a direct role in bone matrix formation and immune function during recovery.

When tested: Pre-surgery if haemoglobin is below normal.

Target values: Serum Ferritin: above 30 ng/mL. Serum Iron: 60–170 mcg/dL. TIBC: 240–450 mcg/dL.

If abnormal: Oral or intravenous iron supplementation depending on severity. Surgery delayed until ferritin and haemoglobin are corrected.

Coagulation Profile (PT, APTT, INR)

Purpose: Assesses the blood clotting pathway before major surgery. Abnormal clotting significantly increases risk of surgical haemorrhage or post-surgical thrombosis (DVT/PE). Patients on anticoagulant medications require careful peri-operative management.

When tested: Pre-surgery (mandatory for all patients).

Target values: PT: 11–13 seconds. APTT: 25–35 seconds. INR: 0.8–1.2 (not on anticoagulants).

If abnormal: Specialist haematology evaluation. Anticoagulant therapy bridged or paused peri-operatively under haematology guidance.

ESR and CRP (Inflammatory Markers)

Purpose: ESR and CRP are non-specific markers of systemic inflammation or infection. Elevated levels before surgery suggest an active inflammatory process — infection, autoimmune flare, or occult inflammatory condition — that must be identified and resolved before elective surgery proceeds.

When tested: Pre-surgery; CRP also monitored post-operatively to detect early pin-site or wound infection.

Target values: ESR: below 20 mm/hr (men), below 30 mm/hr (women). CRP: below 5 mg/L.

If abnormal: Investigation of source required. Surgery delayed until the cause is identified and treated.

D. Renal and Hepatic Function

Kidney Function Tests (Creatinine, eGFR, Urea, Uric Acid)

Purpose: Renal function is critical for surgical safety — kidney function determines anaesthetic drug metabolism, creatinine clearance determines medication dosing during recovery, and chronic kidney disease is associated with abnormal bone metabolism (renal osteodystrophy) that can severely compromise distraction osteogenesis.

When tested: Pre-surgery (mandatory); monitored during recovery if any renal impairment identified.

Target values: Serum Creatinine: below 1.2 mg/dL (women), below 1.4 mg/dL (men). eGFR: above 60 mL/min/1.73m². Urea: 7–25 mg/dL.

If abnormal: Nephrology evaluation required. Anaesthetic protocol modified. Significant CKD may be a contraindication depending on severity.

Liver Function Tests (AST, ALT, Bilirubin, Albumin)

Purpose: Liver function affects drug metabolism (especially anaesthetic agents and post-operative pain medications), albumin production (critical for tissue healing), and Vitamin D activation. Liver disease also impairs coagulation factor synthesis, increasing surgical bleeding risk.

When tested: Pre-surgery (mandatory).

Target values: ALT: below 40 U/L. AST: below 40 U/L. Total Bilirubin: below 1.2 mg/dL. Albumin: above 3.5 g/dL.

If abnormal: Gastroenterology or hepatology evaluation. Significant liver disease is a relative to absolute contraindication depending on severity.

E. Endocrine and Hormonal Investigations

Parathyroid Hormone (PTH)

Purpose: PTH is the master regulator of calcium and phosphorus balance in the body. Hyperparathyroidism (excess PTH) causes excessive bone resorption — bones become weak, porous, and highly prone to fracture. Secondary hyperparathyroidism is common in patients with Vitamin D deficiency and will resolve with Vitamin D correction.

When tested: Pre-surgery, especially if calcium is abnormal or Vitamin D is severely deficient.

Target values: PTH: 15–65 pg/mL.

If abnormal: Vitamin D corrected first (often normalises PTH). Persistent elevation: endocrinology evaluation for primary hyperparathyroidism — may require surgical parathyroid treatment before limb lengthening can proceed.

Vitamin B12 and Folate

Purpose: B12 and folate are essential for red blood cell production and for nerve function — particularly relevant in limb lengthening where nerves are under mechanical stretch throughout the distraction phase. B12 deficiency is extremely common in vegetarians and vegans. Deficiency impairs nerve recovery and can cause peripheral neuropathy, significantly complicating the distraction process.

When tested: Pre-surgery (especially important for vegetarian patients).

Target values: Vitamin B12: above 300 pg/mL (ideally above 500 pg/mL for surgical patients). Folate: above 4.0 ng/mL.

If abnormal: Supplementation prescribed — oral Methylcobalamin for mild deficiency; intramuscular injections for severe deficiency. Corrected before surgery.

F. Infectious Disease Screening

HIV, HBsAg (Hepatitis B), Anti-HCV (Hepatitis C)

Purpose: Standard pre-operative infectious disease screening required before any major surgery. Positive status does not automatically preclude surgery but significantly modifies the surgical protocol, infection control measures, anaesthetic approach, and post-operative care.

When tested: Pre-surgery (mandatory).

Target values: Negative / non-reactive for all three.

If abnormal: Specialist infectious disease consultation. Surgery may proceed under enhanced precautions in stable, non-active disease states with appropriate specialist clearance.

Urine Culture and Sensitivity (Urine R/E)

Purpose: Active urinary tract infection is a contraindication to elective surgery — bacteria in the urine can seed the surgical site via the bloodstream, causing deep bone or pin-site infection. Many patients have asymptomatic bacteriuria — infection without symptoms — that would be missed without testing.

When tested: Pre-surgery (mandatory).

Target values: No significant bacterial growth on culture. No casts, significant proteinuria, or RBCs suggesting renal pathology.

If abnormal: Treated with culture-guided antibiotics. Surgery delayed until urine culture is clear.

ECG (Electrocardiogram)

Purpose: Baseline cardiac assessment before general or spinal anaesthesia. Identifies rhythm abnormalities, conduction defects, previous silent myocardial infarction, and hypertrophic changes that increase anaesthetic risk. Required for all patients; additional echocardiogram may be needed for patients over 40 or with cardiac risk factors.

When tested: Pre-surgery (mandatory).

Target values: No significant arrhythmia, conduction abnormality, or ischaemic changes requiring treatment before surgery.

If abnormal: Cardiology consultation. Echocardiogram and stress testing if indicated. Cardiac optimisation before surgery.

4. Lifestyle and Behavioural Requirements Before Surgery

Medical investigations identify modifiable risk factors. Lifestyle requirements are the patient's commitment to modifying those factors. These are as medically important as any blood test.

Smoking Cessation — Minimum 6–8 Weeks Before Surgery: Nicotine causes vasoconstriction — reduces blood flow to healing bone by up to 40%. Significantly increases risk of delayed bone union, non-union, pin-site infection, and wound breakdown. Nicotine patches and e-cigarettes are also contraindicated — nicotine itself is the problem, not just smoking.

Alcohol Reduction — Minimal or None During Recovery: Excess alcohol directly impairs osteoblast function (bone-forming cells) and reduces bone density. Also interacts with anaesthetic agents, post-operative medications, and impairs immune function. Heavy or daily drinking must stop before surgery.

Healthy Body Weight — BMI 18.5–30 Before Surgery: Excess body weight increases mechanical stress on the regenerating bone segment, raises surgical complications (wound infection, DVT, anaesthetic risk), and slows bone healing. Patients with BMI above 30 are advised to reduce weight meaningfully before surgery. Underweight patients (BMI below 18.5) may require nutritional supplementation before proceeding.

Vitamin D and Calcium Supplementation Protocol: Most Indian patients will require a formal supplementation protocol of 6–12 weeks before surgery to bring Vitamin D above 40 ng/mL and ensure adequate dietary calcium. This is the single most commonly required pre-surgical intervention at Heights Plus.

Nutritional Optimisation — Adequate Protein and Micronutrients: Bone regeneration and muscle maintenance during the 9–14 month recovery are protein-dependent processes. Patients are advised on protein targets of 1.6–2.0g/kg/day and may begin dietary changes or supplementation before surgery.

Iron and Haemoglobin Correction: Patients identified with iron deficiency anaemia must complete a full course of iron supplementation and achieve haemoglobin above the surgical threshold before surgery can proceed. This typically takes 6–8 weeks.

Physical Conditioning — Pre-Surgical Physiotherapy: Patients are advised to begin pre-surgical physical conditioning: strengthening the quadriceps, hamstrings, glutes, and core muscles that will be the primary muscular support during recovery. Patients who arrive stronger heal faster and rehabilitate more successfully.

Medication Review and Adjustment: Blood thinners must be stopped 5–10 days before surgery. NSAIDs (ibuprofen, diclofenac) must be stopped 1 week before and are also contraindicated during early consolidation as they impair bone healing. Herbal supplements must be stopped 2 weeks before. Hormonal contraception requires a risk/benefit discussion regarding DVT risk.

5. Anaesthesia Clearance — What the Anaesthesiologist Evaluates

Limb lengthening surgery is performed under general or spinal anaesthesia. A pre-operative anaesthesia assessment is mandatory for all patients.

Airway Assessment: Mouth opening, neck mobility, jaw protrusion, Mallampati score — predicts ease of intubation. No anticipated difficult airway required.

Cardiovascular: Blood pressure, ECG, cardiac history, exercise tolerance. BP must be controlled below 140/90; no active ischaemia or arrhythmia requiring treatment.

Respiratory: Lung function, history of asthma or COPD, oxygen saturation. SpO2 above 95% at rest; no active respiratory infection; controlled asthma with good peak flow.

Neurological: History of seizures, previous anaesthetic complications, peripheral neuropathy. No uncontrolled epilepsy; previous anaesthetic reactions documented and managed.

Allergies: Known drug allergies — particularly antibiotics, NSAIDs, latex, and anaesthetic agents — documented and alternative agents planned.

Current Medications: Full medication list reviewed; anticoagulants and NSAIDs stopped as per protocol.

Fasting Status: Typically 6 hours fasting for solids, 2 hours for clear liquids before surgery.

ASA Physical Status: ASA Class I or II preferred for elective cosmetic lengthening; Class III requires additional optimisation.

Spinal vs. General Anaesthesia in Limb Lengthening

Spinal Anaesthesia: Preferred for tibial lengthening cases; avoids risks of general anaesthesia in patients with respiratory concerns; patient remains awake but pain-free from the waist down.

General Anaesthesia: Used for femoral lengthening and combined femoral-tibial cases; required when spinal anaesthesia is contraindicated.

Combined Spinal-Epidural (CSE): Used in selected cases for both intra-operative anaesthesia and post-operative pain management — particularly useful for bilateral procedures.

6. Pre-Surgical Optimisation — The 6–12 Week Preparation Window

When investigations reveal suboptimal results, a structured pre-surgical optimisation programme is prescribed. This is standard at Heights Plus — we treat it not as a delay but as an investment in the quality of your surgical outcome.

Vitamin D Deficiency (below 30 ng/mL): 60,000 IU Vitamin D3 weekly for 8 weeks; retest at week 8; maintenance dose thereafter. Timeline: 8–12 weeks.

Iron Deficiency Anaemia: Oral ferrous sulphate or fumarate 200mg twice daily; IV iron infusion if severe. High-iron diet counselling. Timeline: 6–10 weeks for Hb correction.

Hypothyroidism: Levothyroxine titrated to achieve TSH within 0.5–3.0 mIU/L; recheck TSH at 6 weeks. Timeline: 6–8 weeks minimum.

Pre-Diabetes / Insulin Resistance: Low-GI dietary programme, 150 min/week aerobic exercise; Metformin if indicated; recheck HbA1c. Timeline: 3–6 months for meaningful HbA1c change.

Controlled Diabetes (HbA1c 7–8%): Medication optimisation with endocrinologist; enhanced wound care protocol planned. Timeline: 2–6 weeks to confirm stable control.

Low Bone Density — Osteopenia: Vitamin D correction, calcium supplementation 1200–1500mg/day, weight-bearing exercise programme. Timeline: 3–6 months; reassess DEXA.

Active UTI: Culture-guided antibiotic course; urine culture repeated to confirm clearance. Timeline: 1–2 weeks after completing antibiotics.

Elevated CRP (Active Inflammation): Source identification; specific treatment based on cause; inflammatory markers rechecked. Timeline: varies by cause — 2–12 weeks.

Smoking: Smoking cessation programme; nicotine replacement therapy (patches — stopped 2 weeks before surgery). Timeline: minimum 6–8 weeks abstinence required.

Low Haemoglobin from B12 Deficiency: Methylcobalamin IM injections weekly x 4 weeks, then monthly; oral maintenance thereafter. Timeline: 4–8 weeks for meaningful Hb improvement.

7. Complete Pre-Surgical Medical Requirements Checklist

• Full-length lower limb standing X-ray — Mandatory for all patients
• Growth plate assessment X-ray — Absolute prerequisite
• DEXA bone density scan — Mandatory for age 35+; younger patients if risk factors present
• Vitamin D (25-OH) — above 40 ng/mL — Must be corrected; most common deficiency in India
• Serum Calcium and Phosphorus — Normal range required; metabolic bone screen
• Serum Magnesium — Normal range required; supplement if low
• Fasting Glucose and HbA1c — HbA1c must be below 8% to proceed
• Fasting Insulin and HOMA-IR — Required if obese, PCOS, or pre-diabetic
• Thyroid Panel (TSH, Free T3, T4) — TSH must be optimised before surgery
• Lipid Profile — Required; cardiovascular risk screen
• Full Blood Count (FBC) — Hb must meet threshold before surgery
• Iron Studies (Ferritin, Serum Iron, TIBC) — Required if anaemic; must be corrected before surgery
• Vitamin B12 and Folate — Required; critical for vegetarians
• Coagulation Profile (PT, APTT, INR) — Mandatory pre-operative
• ESR and CRP — Required to rule out active infection or inflammation
• Kidney Function Tests (Creatinine, eGFR) — Required; anaesthetic safety
• Liver Function Tests (AST, ALT, Albumin) — Required; drug metabolism screen
• PTH (Parathyroid Hormone) — Required if calcium is abnormal
• HIV, HBsAg, Anti-HCV — Mandatory infection screen
• Urine Routine and Culture — No active UTI before surgery
• ECG (Electrocardiogram) — Required for all patients
• Echocardiogram — Required for patients over 40 or with cardiac risk factors
• Anaesthesia Pre-Assessment — Mandatory for all patients
• Smoking cessation confirmed (6–8 weeks) — Non-negotiable
• Vitamin D supplementation course completed — If deficient; levels retested before surgery
• Iron supplementation course completed — If deficient; Hb confirmed corrected
• Anticoagulants/NSAIDs stopped (per protocol) — If applicable; per anaesthesia advice
• Herbal supplements stopped (2 weeks before) — All patients
• Pre-surgical physiotherapy programme started — Recommended 4–8 weeks pre-surgery
• Nutritional targets being met (protein, calcium) — Dietary counselling provided

8. Frequently Asked Questions

Q: My Vitamin D is 22 ng/mL. How long before I can have surgery?

Vitamin D of 22 ng/mL is classified as deficient. At Heights Plus, we require above 40 ng/mL before surgery. The standard protocol is 60,000 IU of Vitamin D3 weekly for 8 weeks, followed by a retest. Most patients reach target levels after 8–12 weeks. After the course, levels are rechecked — if above 40 ng/mL, surgical scheduling can proceed. A maintenance dose is then prescribed for the entire recovery period. Total expected delay from deficiency correction to surgery: approximately 10–14 weeks including the repeat blood test.

Q: I take blood thinners (rivaroxaban) for a heart condition. Can I still have surgery?

Yes — patients on anticoagulant therapy can still have limb lengthening surgery, but require careful peri-operative management. Rivaroxaban and similar DOACs are typically stopped 48–72 hours before surgery. The decision on stopping, bridging, or continuing anticoagulation is made jointly by our surgeon and your cardiologist. If you have a mechanical heart valve or very high clotting risk, a bridging protocol with low-molecular-weight heparin (LMWH) may be used. Your full cardiac history and reason for anticoagulation must be disclosed at consultation.

Q: My HbA1c is 8.5%. Can I still get surgery if I improve my diet?

Not immediately — but potentially yes, after achieving better control. HbA1c of 8.5% is above our surgical threshold of 8.0% (we prefer below 7.0% ideally). Lifestyle changes and medication optimisation can meaningfully reduce HbA1c over 3–6 months. We recommend working with your endocrinologist to bring HbA1c below 7.5% before reconsidering surgery. Once HbA1c is at target and stable for at least one testing cycle (3 months), surgical planning can proceed with enhanced monitoring protocols.

Q: Do I need to get all these tests done before my first consultation?

No — you do not need to arrive at your first consultation with all investigations completed. The first consultation is a clinical discussion, physical assessment, and planning session. Our team will then prescribe the specific investigations needed for your case — not all patients require every test listed in this guide. Bring any previous investigations you already have — particularly bone density scans, blood reports, cardiac assessments, or prior orthopaedic imaging. These can reduce duplication.

Q: I take ibuprofen regularly for back pain. Is this a problem?

Yes — this is an important issue to disclose. NSAIDs (ibuprofen, diclofenac, naproxen) must be stopped at least 7–10 days before surgery due to their platelet-inhibiting effects. More significantly, NSAIDs are contraindicated during the entire distraction and early consolidation phase of limb lengthening — they directly inhibit prostaglandin-mediated bone healing and can lead to delayed union or non-union. Alternative pain management for your back pain during recovery will be discussed. Disclose all regular medications, including over-the-counter drugs and supplements, at your consultation.

Q: What happens if I fail to meet a medical requirement?

No requirement is a dead end — it is an optimisation target. Our team will create a personalised plan to bring any out-of-range result to the required level, prescribe the appropriate supplementation or treatment, set a timeline for reassessment, and schedule surgery once all criteria are confirmed. The pre-surgical period is an active preparation phase, not a waiting room.

Q: Can I do the blood tests at my own local lab?

Yes — most standard blood tests can be performed at a NABL-accredited laboratory near you and the reports shared with our team before your consultation. Some specialised tests or imaging (such as the full-length standing limb X-ray) are best performed at our centre or a facility familiar with the specific protocol we require. Our team will advise on which tests can be done locally and which need to be done here.

Q: How far in advance should I begin preparing before my target surgery date?

Ideally, begin your medical assessment 3–4 months before your target surgery date. This allows sufficient time for all investigations to be completed, any deficiencies to be corrected (particularly Vitamin D and iron, which each take 6–12 weeks), pre-surgical physiotherapy to begin, and anaesthesia clearance to be finalised without rushing. Patients who begin preparation early consistently have a smoother path to surgical clearance.

Conclusion

The medical requirements for limb lengthening surgery exist for one reason: to ensure that when you go into the operating theatre at Heights Plus, your body is in the best possible state to build new bone, heal surrounding tissues, recover strongly, and walk out at your new height with full function and confidence.

Every blood test, every imaging study, every lifestyle requirement in this guide is an investment — in your safety, your healing, and your outcome. The pre-surgical period is not a waiting room. It is an active preparation phase, and the patients who engage with it fully consistently achieve the best results.

If you have questions about any specific requirement — or if a blood test result has you concerned — our specialist team at Heights Plus will explain everything clearly, create a personalised optimisation plan, and ensure you are fully ready for the journey ahead.

Heights Plus, Gurgaon — For the Taller You.