How to Perform a Hormone Pellet Insertion: Step-by-Step Procedure Guide

Hormone pellet insertion is a minimally invasive, in-office procedure used in hormone replacement therapy (HRT) to deliver estradiol or testosterone pellets into the subcutaneous tissue, typically in the upper outer gluteal region.

The hormone pellet insertion procedure is performed using a sterile trocar kit — most commonly 3.2mm, 3.5mm, or 4.5mm depending on pellet size and patient anatomy. The standard steps include site selection, sterile preparation and fenestrated draping, administration of 1–3 mL of local anesthetic via a 22-gauge needle, a small 3–5mm incision with a #11 scalpel blade, trocar insertion at a 30–45° angle into the subcutaneous plane, pellet deployment, and closure with Steri-strips and a pressure dressing.

Total procedure time is typically 7–15 minutes, with the 3.5mm stainless steel trocar being the most commonly used size for standard hormone pellet insertion in both men and women. Using a sterile procedure kit packaged and sterilized in the USA supports compliance documentation, full lot traceability, and consistent instrumentation for high-volume HRT practices.

What Supplies Are Needed for Hormone Pellet Insertion?

A hormone pellet insertion procedure requires a sterile trocar kit, local anesthetic, and hormone pellets sourced from a licensed compounding pharmacy. For efficiency and compliance, most clinics use a pre-assembled sterile procedure kit that contains all required disposable components in one tray. This ensures consistency across procedures and reduces setup time in high-volume HRT practices.

Core Components of a Sterile Trocar Kit

A standard sterile trocar kit for hormone pellet insertion typically includes:

• Disposable trocar (3.2mm, 3.5mm, or 4.5mm)
• Sterile procedure tray
• CSR wrap
• Fenestrated drape
• #11 scalpel blade
• 12cc syringe with 22-gauge needle (for local anesthetic)
• Non-latex sterile gloves
• Isopropyl prep pad
• Povidone-iodine swabs
• Sterile gauze
• Steri-strips (wound closure strips)
• Sterile forceps/pick-ups

These components support a fully sterile field, controlled incision, subcutaneous trocar placement, and secure wound closure — all within a single-use format.

Trocar Size and Pellet Compatibility

Trocar size selection depends on pellet diameter, pellet count, and patient anatomy:

• 3.2mm trocar – Commonly used for 3mm estradiol pellets in female patients and lower pellet count insertions.
• 3.5mm trocar (stainless steel) – The most frequently used size for standard hormone pellet insertion in both men and women.
• 4.5mm trocar – Often selected for larger or multiple pellet insertions, including 150–200mg testosterone pellets in male patients.

Choosing the correct trocar size reduces tissue trauma and supports smooth pellet deployment within the subcutaneous plane.

Important: Pellets Are Not Included

Hormone pellets themselves are not included in a sterile trocar kit. Pellets are prescribed and compounded separately through a licensed compounding pharmacy. The trocar kit provides the sterile instrumentation required for the insertion procedure only.

For regulatory assurance, clinics should source sterile procedure kits manufactured under FDA and ISO compliant processes. Kits that are packaged and sterilized in the USA offer additional documentation support, including lot traceability and supply chain transparency — factors that are increasingly important for compliance-conscious OB/GYN, urology, and functional medicine practices.

What Size Trocar Should Be Used for Hormone Pellet Insertion?

The correct trocar size for hormone pellet insertion depends on pellet diameter, pellet count, and patient anatomy. In most standard HRT procedures, a 3.5mm trocar is the most commonly used size because it accommodates typical estradiol and testosterone pellet insertions while maintaining controlled subcutaneous placement.

However, smaller or larger trocars may be more appropriate depending on the formulation and clinical scenario.

Trocar Size Comparison for Hormone Pellet Insertion

How to Choose the Right Trocar Size

When selecting a trocar for hormone pellet insertion, consider the following clinical factors:

1. Pellet Diameter

A 3mm estradiol pellet typically pairs well with a 3.2mm trocar, while larger testosterone pellets may require a 3.5mm or 4.5mm trocar for smooth deployment.

2. Pellet Count

Higher pellet counts increase tract diameter requirements. For multiple 150–200mg testosterone pellets, many practitioners prefer a 4.5mm trocar to reduce resistance during insertion.

3. Subcutaneous Tissue Thickness

Patients with thicker adipose layers may tolerate a slightly larger trocar more comfortably, while lean patients may benefit from smaller-diameter instrumentation to minimize tissue disruption.

4. Practitioner Preference (Material and Feel)

• Stainless steel trocars provide greater rigidity and tactile feedback during insertion.
• Plastic (medical-grade resin) trocars are lightweight and cost-effective, particularly for clinics performing high-volume procedures.

Selecting the correct trocar size supports smooth pellet deployment, minimizes tissue trauma, and reduces the risk of superficial placement or extrusion. Clinics that standardize sizing protocols based on pellet formulation and patient profile often see improved procedural consistency and efficiency.

Where Is the Hormone Pellet Inserted?

In a standard hormone pellet insertion procedure, the pellets are placed in the subcutaneous tissue of the upper outer quadrant of the gluteal region. The goal is consistent subcutaneous placement — not intramuscular delivery — to ensure steady hormone absorption over the intended duration of therapy.

The upper outer gluteal area is preferred because it provides:

• Adequate subcutaneous tissue depth
• Lower risk of neurovascular structures
• Patient comfort during sitting and movement
• Reduced likelihood of pellet extrusion when placed correctly

Subcutaneous Plane vs. Intramuscular Placement

Hormone pellets must be deployed into the subcutaneous fat layer, not into muscle tissue. Intramuscular placement can lead to:

• Increased post-procedure discomfort
• Altered hormone release kinetics
• Higher risk of inflammation or pellet migration

Maintaining the correct tissue plane is essential for predictable absorption and patient satisfaction.

Typical Depth and Insertion Angle

While patient anatomy varies, pellets are generally placed at a depth of approximately 1 to 1.5 inches, depending on the thickness of the adipose layer. Lean patients may require a shallower tract, while patients with greater subcutaneous tissue may allow for deeper placement within the same tissue plane.

The trocar is typically advanced at a 30–45° angle from the skin surface to create a smooth subcutaneous tract. This angle:

• Helps maintain consistent depth
• Reduces risk of superficial placement
• Supports stable pellet positioning

Accurate site selection, appropriate angle, and controlled depth are key factors in reducing complications such as pellet extrusion, bruising, or superficial deposition.

Step-by-Step Hormone Pellet Insertion Procedure

The hormone pellet insertion procedure follows a standardized sterile technique to ensure consistent subcutaneous placement, minimize complications, and support predictable hormone absorption. When performed with a single-use sterile trocar kit, the process is efficient, reproducible, and typically completed within 7–15 minutes.

Below is a step-by-step breakdown formatted for procedural clarity.

Learn more about what’s inside a sterile trocar kit? A complete component breakdown.

Step 1: Prepare the Sterile Field

Proper sterile setup is essential for reducing infection risk and maintaining procedural consistency.

1. Confirm Pellet Dosage and Count

Before beginning, verify:

• Hormone type (estradiol or testosterone)
• Pellet strength (e.g., 3mm estradiol pellets or 150–200mg testosterone pellets)
• Total number of pellets to be inserted

Pellets are sourced separately from a licensed compounding pharmacy and should be confirmed against the patient’s treatment plan before opening the sterile trocar kit.

2. Position the Patient

Place the patient in either:

• Prone position, or
• Lateral decubitus position, exposing the upper outer gluteal quadrant

Ensure adequate access to the insertion site while maintaining patient comfort and stability.

3. Don Sterile Gloves

Open the sterile procedure kit and don the included non-latex sterile gloves. Using a pre-packaged sterile trocar kit helps standardize setup and reduces variability between procedures.

4. Apply Antiseptic Prep

Clean the insertion site thoroughly using:

• Povidone-iodine swabs, followed by
• An isopropyl prep pad if part of clinic protocol

Allow adequate drying time to maximize antiseptic effectiveness.

5. Place the Fenestrated Drape

Apply the sterile fenestrated drape over the prepared site, exposing only the intended insertion area. This maintains a controlled sterile field throughout the incision and trocar insertion steps.

Using a sterile procedure kit manufactured under FDA and ISO compliant processes — and packaged and sterilized in the USA — supports regulatory documentation and lot traceability, which is increasingly important for compliance-focused HRT practices.

Step 2: Administer Local Anesthetic

Local anesthesia is administered prior to incision and trocar insertion to ensure patient comfort and procedural precision. In most hormone pellet insertion procedures, 1–3 mL of lidocaine is sufficient for adequate subcutaneous anesthesia along the intended trocar tract.

1. Prepare the Syringe

Using the 12cc syringe with 22-gauge needle included in the sterile trocar kit:

• Draw 1–3 mL of lidocaine (commonly 1% lidocaine without epinephrine, per clinic protocol).
• Expel excess air and confirm smooth plunger movement before injection.

The 22-gauge needle allows controlled infiltration with minimal tissue trauma.

2. Infiltrate the Subcutaneous Tract

Inject the anesthetic:

• Directly into the dermis at the planned incision site
• Then along the projected subcutaneous tract at approximately a 30–45° angle

Advance the needle to the anticipated depth of pellet placement (typically 1–1.5 inches, depending on adipose thickness), infiltrating gradually while withdrawing to create a fully anesthetized pathway.

3. Allow Adequate Onset Time

Wait approximately 60–120 seconds to allow the anesthetic to take full effect before proceeding with the incision.

Proper anesthetic technique improves patient tolerance, reduces involuntary movement during trocar advancement, and supports precise subcutaneous pellet deployment in the subsequent steps.

Step 3: Make the Incision

Once adequate local anesthesia has been achieved, a small skin incision is made to allow smooth trocar entry into the subcutaneous tissue.

1. Use a #11 Scalpel Blade

Using the sterile #11 scalpel blade included in the trocar kit, position the blade at the anesthetized insertion site within the upper outer gluteal quadrant.

The #11 blade is preferred for hormone pellet insertion because its pointed tip allows precise, controlled entry with minimal tissue disruption.

2. Create a 3–5mm Skin Incision

Make a small incision approximately 3–5mm in length. The incision should be:

• Clean and controlled
• Large enough to accommodate the trocar diameter (3.2mm, 3.5mm, or 4.5mm)
• Aligned with the intended 30–45° insertion angle

A properly sized incision reduces resistance during trocar advancement and minimizes tissue drag.

3. Limit Depth to the Dermal Layer

The incision should be just deep enough to allow the trocar tip to enter the subcutaneous plane. Excessively deep incisions are unnecessary and may increase bleeding or bruising.

Maintaining a precise incision size supports smoother trocar insertion, reduces tissue trauma, and helps ensure consistent subcutaneous pellet placement in the next step.

Step 4: Insert the Trocar

Trocar insertion establishes the subcutaneous tract for hormone pellet placement. Proper angle, depth control, and steady advancement are critical to avoid superficial placement or unintended intramuscular penetration.

1. Insert at a 30–45° Angle

Introduce the trocar through the 3–5mm incision at approximately a 30–45° angle relative to the skin surface. This angle helps maintain placement within the subcutaneous tissue plane while reducing the risk of advancing too deeply.

2. Advance Into the Subcutaneous Space

Gently advance the trocar to the intended depth — typically 1 to 1.5 inches, depending on adipose thickness and patient anatomy. The movement should be smooth and controlled, creating a uniform tract for pellet deployment.

The goal is consistent subcutaneous positioning, not intramuscular entry.

3. Avoid Excessive Force

Do not force the trocar. Resistance may indicate:

• Inadequate incision size
• Incorrect angle
• Contact with denser tissue planes

If necessary, withdraw slightly and adjust rather than applying additional pressure. Controlled advancement reduces tissue trauma and supports accurate pellet placement.

Stainless Steel vs. Plastic Trocar: Tactile Considerations

Material selection can influence procedural feel and workflow efficiency:

• Stainless steel trocars provide greater rigidity and enhanced tactile feedback during advancement. Many practitioners prefer steel for its precision and stability, particularly during standard 3.5mm insertions.
• Plastic trocars (medical-grade resin) are lightweight and cost-effective, making them well suited for high-volume clinics performing multiple hormone pellet insertion procedures per day.

Both options are designed for single-use sterile application. Clinics that source trocars manufactured under FDA and ISO compliant processes — and packaged and sterilized in the USA — benefit from consistent instrumentation and documented lot traceability across procedures.

Step 5: Deploy the Pellets

Pellet deployment is the most critical phase of the hormone pellet insertion procedure. Controlled advancement ensures the pellets remain within the established subcutaneous tract and are positioned at the intended depth.

1. Load the Pellets Into the Trocar Cannula

Once the trocar is fully advanced into the subcutaneous space, load the prescribed pellets into the trocar cannula. Confirm:

• Correct hormone type (estradiol or testosterone)
• Correct pellet strength (e.g., 3mm estradiol or 150–200mg testosterone)
• Correct pellet count

Pellets should be handled with sterile forceps to maintain field integrity.

2. Advance the Pellets Using the Obturator

Insert the obturator into the trocar cannula and gently advance the pellets forward through the established tract.

Apply steady, controlled pressure. The pellets should move smoothly without resistance. Excess force is not required when the incision and tract are properly created.

3. Maintain a Consistent Subcutaneous Tract

Keep the trocar stable during pellet advancement. Movement or redirection at this stage may:

• Alter pellet positioning
• Increase risk of superficial placement
• Increase risk of pellet extrusion

Maintaining alignment with the original 30–45° tract helps ensure even subcutaneous distribution.

4. Withdraw the Trocar While Holding the Obturator Steady

As the pellets reach the distal end of the tract, slowly withdraw the trocar while keeping the obturator stationary. This technique allows the pellets to remain in place within the subcutaneous tissue as the cannula is removed.

Controlled withdrawal prevents pellet displacement and supports consistent hormone release over the intended treatment duration.

Proper deployment technique minimizes complications such as extrusion, uneven absorption, or localized discomfort — reinforcing the importance of precise instrumentation and standardized sterile procedure kits in hormone pellet insertion workflows.

Step 6: Close the Incision

Proper wound closure following hormone pellet insertion helps reduce bleeding, minimize bruising, and decrease the risk of pellet extrusion.

1. Apply Direct Pressure (30–60 Seconds)

Immediately after trocar removal, apply firm, sterile gauze pressure to the incision site for approximately 30–60 seconds. This helps:

• Control minor bleeding
• Reduce hematoma formation
• Stabilize the subcutaneous tract

Additional pressure time may be required depending on patient anticoagulation status or tissue response.

2. Close the Incision With Steri-Strips

Once hemostasis is achieved, approximate the skin edges and apply Steri-strips (wound closure strips) across the 3–5mm incision.

Sutures are typically not required for standard hormone pellet insertion due to the small incision size. Steri-strips provide adequate closure while allowing natural healing.

3. Apply a Sterile Gauze Dressing

Place a small sterile gauze pad over the site and secure it with adhesive dressing or medical tape per clinic protocol.

Some clinics advise patients to:

• Keep the site dry for 24 hours
• Avoid strenuous lower-body activity for 3–5 days
• Monitor for redness, swelling, or signs of infection

A properly closed incision, combined with accurate subcutaneous pellet placement, supports predictable hormone release and reduces post-procedure complications.

How Long Does a Hormone Pellet Insertion Take?

A standard hormone pellet insertion procedure typically takes 7–15 minutes from sterile setup to final dressing application. In experienced hands with a standardized sterile trocar kit, the active insertion portion — from incision to closure — is often completed in under 10 minutes.

Total time may vary depending on:

• Pellet count (single vs. multiple 150–200mg testosterone pellets)
• Patient anatomy and subcutaneous tissue thickness
• Clinic workflow efficiency
• Practitioner experience

In high-volume HRT practices, it is common to perform 10–20 hormone pellet insertion procedures per day, particularly when using pre-assembled sterile procedure kits that reduce setup time and instrument variability.

Why Procedure Time Matters for Clinics

Procedure efficiency directly impacts:

• Cost per insertion
• Daily patient capacity
• Provider utilization
• Overall clinic margin

Even a 3–5 minute reduction in average procedure time can meaningfully increase daily throughput in a medspa or functional medicine setting offering pellet-based hormone replacement therapy (HRT).

Clinics that standardize trocar sizing protocols, use single-use sterile kits packaged and sterilized in the USA, and streamline room turnover often see improved workflow consistency and reduced per-procedure overhead — without compromising clinical precision or compliance documentation.

What Are Common Complications to Avoid?

Hormone pellet insertion is a low-risk, in-office procedure when performed with proper sterile technique and correct subcutaneous placement. However, certain complications can occur if technique, instrumentation, or post-procedure care are inconsistent.

The most common complications to avoid include:

• Pellet extrusion
• Superficial placement
• Infection
• Bruising
• Hematoma formation

Pellet Extrusion

Pellet extrusion occurs when a pellet migrates toward or through the incision site. This is most often associated with:

• Superficial subcutaneous placement
• Inadequate tract depth (less than ~1 inch in appropriate candidates)
• Excessive post-procedure movement

Maintaining a consistent 30–45° insertion angle and proper depth reduces this risk.

Superficial Placement

If pellets are placed too close to the dermal layer, patients may experience:

• Localized tenderness
• Visible or palpable pellet outline
• Higher extrusion risk

Accurate trocar advancement into the subcutaneous plane — not intramuscular and not dermal — is essential for predictable hormone release.

Infection

Infection risk is low but possible with any minor surgical procedure. Risk factors include:

• Inadequate skin antisepsis
• Breaks in sterile field technique
• Reusable instrumentation without proper sterilization

Using sterile, single-use trocar kits significantly reduces cross-contamination risk. Kits manufactured under FDA and ISO compliant processes and packaged and sterilized in the USA provide documented sterility assurance and lot traceability, which supports both patient safety and compliance documentation.

Bruising

Minor bruising at the insertion site is relatively common and typically self-limited. Proper pressure application for 30–60 seconds post-insertion and careful anesthetic infiltration can reduce incidence.

Hematoma Formation

Hematomas may occur if bleeding is not adequately controlled before closure. Applying firm pressure immediately after trocar removal and ensuring proper incision size (3–5mm) helps minimize this risk.

Disposable vs. Reusable Trocar for Pellet Insertion — Which Is Better?

Both disposable and reusable trocars can be effective for hormone pellet insertion, and the right choice depends on clinic volume, sterilization capacity, and cost structure.

Disposable Trocar Kits

Disposable (single-use) trocar kits are pre-assembled sterile procedure kits designed for one-time use. Advantages include:

• Packaged and sterilized in the USA
• No autoclave required
• Faster room turnover
• Reduced cross-contamination risk
• Full lot traceability per procedure

For medspas and functional medicine clinics performing 5–20 pellet insertions per day, disposable kits simplify workflow and eliminate reprocessing time. They are particularly useful in multi-room environments where efficiency directly impacts daily revenue.

Reusable Trocar Sets

Reusable stainless steel trocar sets are designed for repeated use and must be sterilized between procedures using an autoclave. Advantages include:

• Lower long-term cost per procedure in high-volume settings
• Durable stainless steel construction
• Precision engineering with consistent tactile feedback

Clinics with in-house sterilization infrastructure and predictable procedural volume may see cost savings over time with reusable instrumentation.

Which Is Better for Your Clinic?

There is no universal answer. Disposable trocars prioritize efficiency and sterility assurance, while reusable trocars prioritize long-term instrument cost control. Many clinics evaluate:

• Monthly procedure volume
• Autoclave capacity and staffing
• Cost per insertion
• Compliance documentation requirements

For a detailed breakdown of cost comparison, workflow impact, and sterilization considerations, see our full guide:

→ [Disposable vs. Reusable Trocar Kits: Which Is Better for Your Clinic?]

As a vertically integrated manufacturer, Nandi Medical offers both disposable sterile trocar kits and reusable stainless steel trocar sets direct from the manufacturer — allowing clinics to standardize their supply chain without relying on multiple vendors.

How to Document Hormone Pellet Insertion for Compliance

Proper documentation of a hormone pellet insertion procedure supports regulatory compliance, quality assurance, and risk management. Whether performed in a medspa, functional medicine clinic, OB/GYN practice, or urology office, consistent charting protects both the provider and the patient.

At minimum, documentation should include the following elements:

1. Lot Number Traceability

Record the lot number of the sterile trocar kit used during the procedure. Lot tracking allows clinics to:

• Maintain supply chain documentation
• Respond quickly to any manufacturer notifications
• Demonstrate sterility assurance during audits

Using sterile procedure kits packaged and sterilized in the USA under FDA and ISO compliant processes simplifies lot-level traceability and recordkeeping.

2. Pellet Dosage and Quantity

The medical record should clearly state:

• Hormone type (estradiol or testosterone)
• Individual pellet strength (e.g., 3mm estradiol or 150–200mg testosterone pellets)
• Total number of pellets inserted

Because pellets are sourced from a licensed compounding pharmacy, dosage documentation should align with the prescribing provider’s treatment plan.

3. Insertion Site Documentation

Chart the anatomical location of insertion, typically:

• Upper outer quadrant of the gluteal region
• Left or right side specified

Documenting laterality and site reduces confusion during future replacement procedures and supports continuity of care.

4. Informed Consent on File

Ensure signed informed consent is present in the patient record prior to the hormone pellet insertion procedure. Consent should cover:

• Risks (e.g., extrusion, bruising, infection)
• Expected duration of therapy
• Post-procedure care instructions

Why Traceability Matters

Clinics sourcing directly from a vertically integrated manufacturer benefit from streamlined traceability. When manufacturing, packaging, and sterilization are controlled within a single production process, documentation accuracy improves and supply chain transparency is easier to verify.

For compliance-conscious practices — particularly those subject to internal audits or accreditation reviews — consistent procedural documentation paired with manufacturer-controlled production supports defensible, organized recordkeeping across all hormone pellet insertion cases.

Frequently Asked Questions About Hormone Pellet Insertion

Does hormone pellet insertion require sutures?

In most cases, sutures are not required for hormone pellet insertion. The incision is typically 3–5mm in length and can be closed effectively with Steri-strips and a sterile gauze dressing. When proper pressure is applied for 30–60 seconds after trocar removal, wound closure is straightforward and heals without the need for stitches.

How deep should pellets be placed?

Hormone pellets should be placed within the subcutaneous tissue plane, not intramuscularly and not within the dermis. In most patients, this corresponds to a depth of approximately 1–1.5 inches, depending on adipose thickness. Maintaining a 30–45° insertion angle helps ensure consistent subcutaneous placement and reduces extrusion risk.

How many pellets are typically inserted?

The number of pellets inserted depends on hormone type, dosage, and patient treatment plan. Estradiol insertions may involve fewer 3mm pellets, while testosterone therapy often requires multiple pellets totaling 150–200mg or more, depending on clinical goals. Pellet count should always align with the prescribing provider’s documented dosage plan.

What is the most common trocar size for hormone pellet insertion?

The 3.5mm trocar, typically in stainless steel, is the most commonly used size for standard hormone pellet insertion in both men and women. A 3.2mm trocar is often used for smaller estradiol pellets, while a 4.5mm trocar may be preferred for larger or multiple testosterone pellet insertions.

How often are hormone pellets replaced?

Hormone pellets are generally replaced every 3–6 months, depending on hormone type, metabolic response, and patient-specific treatment goals. Testosterone pellets may last approximately 4–6 months in many patients, while estradiol pellets may require shorter replacement intervals. Follow-up lab monitoring typically guides timing for reinsertion.

Conclusion

Hormone pellet insertion is a standardized, minimally invasive procedure that can be completed in 7–15 minutes when performed with proper sterile technique and appropriate trocar selection. Successful outcomes depend on consistent subcutaneous placement, correct trocar sizing (3.2mm, 3.5mm, or 4.5mm), controlled pellet deployment, and clear post-procedure documentation. When each step — from sterile field preparation to incision closure — is executed methodically, complication rates remain low and hormone delivery remains predictable.

For clinics offering hormone replacement therapy (HRT), procedural consistency also impacts operational performance. Standardized sterile trocar kits reduce setup variability, support faster room turnover, and simplify compliance documentation through lot-level traceability. This becomes especially important for medspas, functional medicine clinics, OB/GYN practices, and urology offices performing multiple insertions per day.

Sourcing sterile procedure kits from a vertically integrated manufacturer — with products packaged and sterilized in the USA under FDA and ISO compliant processes — provides additional assurance around quality control and supply chain transparency.

As HRT demand continues to grow, clinics that prioritize precise technique, efficient workflow, and reliable instrumentation are best positioned to deliver consistent patient outcomes while maintaining strong procedural margins.