How To Remove A Midline Catheter Safely: A Complete Clinical Protocol

Removing a midline catheter requires strict adherence to aseptic technique, slow and steady traction parallel to the vein, and immediate post-removal site assessment. Clinicians must verify catheter tip integrity by comparing the extracted length to the insertion record, followed by applying a sterile occlusive dressing for a minimum of 24 hours to prevent air embolism or tract contamination.

Clinical Pre-Procedure Assessment and Equipment Checklist

A midline catheter is a vascular access device measuring between 8 and 20 centimeters in length, typically inserted via the basilic, cephalic, or brachial veins of the upper arm, with the distal tip terminating in the axillary vein, just distal to the subclavian vein. Because this catheter sits within a major deep vein of the upper extremity, removal is an invasive clinical procedure that carries risk of venous spasm, catheter fracture, local hemorrhage, thrombus dislodgement, and infection.

Before beginning the removal process, the clinician must confirm a valid provider order for discontinuation. The patient's clinical history must be reviewed, noting any ongoing anticoagulation therapies, history of deep vein thrombosis, or prior complications with vascular access devices. The procedure must be performed by a licensed clinician—typically a registered nurse, vascular access specialist, or physician—trained in the management of midlines and peripheral intravenous therapies.

Essential Equipment and Materials

• Sterile dressing kit containing sterile drapes, gauze, and forceps
• Non-sterile, clean examination gloves
• Alcohol-free adhesive remover wipes (to minimize epidermal stripping)
• 2% Chlorhexidine Gluconate (CHG) with 70% Isopropyl Alcohol applicators
• Sterile 2x2 inch gauze pads (do not use alcohol swabs for post-removal pressure, as alcohol prevents clotting and causes pain)
• Petroleum-based ointment or sterile occlusive gel (to seal the venous tract)
• Waterproof, sterile transparent semi-permeable membrane dressing
• Sterile suture removal kit (if the catheter is secured with non-absorbable sutures)
• Non-sterile measuring tape
• Biohazard disposal container and clean utility drape

Mandatory Prerequisite Knowledge and Regulatory Standards

• Strict adherence to the Infusion Nurses Society (INS) Standards of Practice.
• Verification of patient identity using at least two distinct institutional identifiers (e.g., full name and date of birth).
• Mastery of upper extremity venous anatomy, specifically the pathway of the basilic, cephalic, and brachial veins.
• Core understanding of the signs and symptoms of catheter-related venous thrombosis and localized catheter-associated bloodstream infections (CABSI).

Process Benchmarks

• Estimated Duration: 10 to 15 minutes of clinical contact time, excluding post-removal observation.
• Cost Factor: Minimal; standard medical inventory supplies.
• Post-Removal Care Window: Active monitoring of the insertion site every 15 minutes for the first hour, followed by standard shift assessments.

Vascular Access: Step-by-Step Midline Catheter Removal Workflow

Executing a safe midline catheter removal requires a controlled, systematic approach to protect the structural integrity of the vein, prevent air introduction into the venous system, and ensure patient comfort.

Step 1: Patient Verification, Positioning, and Environment Setup

Verify the patient’s identity using two institutional identifiers. Explain the removal procedure to the patient, emphasizing the need to keep the arm still and relaxed.

Position the patient in a supine or semi-Fowler’s position, with the target arm fully extended, abducted approximately 45 to 90 degrees from the torso, and positioned flat on a clean utility drape. Ensure the arm is at or below the level of the heart. This positioning decreases venous pressure within the upper extremity, lowering the potential for retrograde air aspiration through the tract during the brief window between catheter extraction and site occlusion.

Step 2: Gaining Access and Removing Securement Devices

Perform thorough hand hygiene and don clean, non-sterile examination gloves. Carefully peel back the existing transparent semi-permeable membrane dressing, stabilizing the catheter hub with your non-dominant hand. Always peel the dressing toward the insertion site to minimize traction on the catheter and reduce the risk of accidental premature dislodgement.

Apply an alcohol-free adhesive remover wipe to dissolve the adhesive of the securement device (such as a SecurAcath or StatLock) or carefully cut and remove any stabilization sutures using a sterile suture cutter. Discard the soiled dressing, securement device, and used gloves into a biohazard receptacle.

Step 3: Site Antisepsis and Local Assessment

Perform hand hygiene again and don a fresh pair of clean, or sterile, gloves depending on institutional policy. Inspect the insertion site and the surrounding tissue of the upper arm. Evaluate for any erythema, warmth, edema, tenderness, induration, or purulent drainage, which could indicate localized phlebitis, thrombosis, or infection.

Take a 2% Chlorhexidine Gluconate (CHG) applicator, activate it, and cleanse the insertion site and surrounding skin for at least 30 seconds using a vigorous back-and-forth friction rub. Allow the site to air-dry completely. Do not fan or blow on the wet skin, as this reintroduces airborne contaminants.

Step 4: Catheter Extraction and Traction Application

Grasp the catheter hub or the catheter body immediately adjacent to the insertion site. Align your pulling hand parallel to the patient's arm, ensuring that the angle of withdrawal is parallel to the vein (approximately a 0 to 10-degree angle from the skin surface). Instruct the patient to breathe normally and relax their arm muscles.

Slowly, steadily, and continuously withdraw the catheter. Do not pull with rapid, jerking, or forceful motions. Rapid pulling can irritate the vascular intima, triggering a sudden venospasm that can trap the catheter and cause severe pain or catheter breakage.

Pro-Tip: If you encounter any resistance during the extraction process, stop immediately. Never attempt to force or pull a resistant catheter. Forceful extraction can shear the polyurethane or silicone material, leaving a catheter fragment inside the vein, or cause severe mechanical phlebitis.

Step 5: Post-Extraction Tract Occlusion and Hemostasis

The moment the distal tip of the catheter exits the skin, immediately cover the insertion site with a sterile 2x2 inch gauze pad. Apply firm, direct digital pressure to the site using your index and middle fingers.

Maintain this direct pressure for a minimum of 2 to 3 continuous minutes. If the patient is on systemic anticoagulation therapy (such as heparin, warfarin, or apixaban) or has a known coagulopathy, maintain continuous direct pressure for at least 10 to 15 minutes, or until complete hemostasis is verified.

Warning: Do not apply heavy digital pressure directly over the insertion site while the catheter is still being actively withdrawn. Pressing down on the vein while the catheter body is moving through it can scrape the delicate tunica intima of the vessel wall, leading to immediate mechanical trauma, localized clot formation, or severe venospasm.

Step 6: Application of the Occlusive Dressing

While maintaining pressure, prepare a sterile dressing to seal the tract. Apply a small amount of sterile petroleum-based ointment or a clinical occlusive gel directly to the insertion site, then place a clean, dry, folded sterile 2x2 gauze pad over the ointment.

Secure this setup firmly with a transparent semi-permeable adhesive dressing, ensuring an airtight seal on all four sides. The petroleum ointment acts as a physical barrier that plugs the subcutaneous tract, preventing atmospheric air from entering the venous circulation and protecting the healing tract from external bacterial contamination.

Step 7: Catheter Integrity Verification and Documentation

Inspect the retrieved midline catheter immediately. Examine the distal tip under bright light to verify that it is clean, smooth, and fully intact, showing no signs of tearing, stretching, or fragmentation.

Using a non-sterile measuring tape, measure the entire length of the extracted catheter from the hub to the distal tip. Cross-reference this measurement with the catheter insertion length documented in the patient's electronic health record.

Discard the used catheter and supplies in accordance with your facility’s biohazard waste protocols. Remove your gloves, perform hand hygiene, and document the procedure. Document the date, time, catheter length, tip integrity, site appearance, patient tolerance, and the application of the sterile occlusive dressing.

Midline Catheter Specifications and Removal Metrics

The physical and clinical properties of midline catheters dictate specific procedural parameters during removal, distinguishing them from standard peripheral IVs and central venous access devices (CVADs).

Clinical Complications, Catheter Resistance, and Remediation

Despite meticulous technique, complications can arise during or immediately following the removal of a midline catheter. Prompt recognition and action are necessary to protect patient safety.

Scenario 1: Sudden Resistance Encountered During Catheter Withdrawal

• Root Cause: Vascular spasm (venospasm) triggered by mechanical irritation of the vessel's smooth muscle layer, localized catheter-associated venous thrombosis, or a fibrin sheath anchoring the catheter to the vessel wall.
• Actionable Fix: Halt the extraction immediately. Do not apply further outward force. Apply a warm, moist compress over the upper arm and axilla for 15 minutes to promote smooth muscle relaxation and vasodilation. Instruct the patient to perform deep, slow diaphragmatic breathing to reduce systemic anxiety and sympathetic nervous system tone. Attempt gentle traction again after 15 minutes. If the catheter remains stuck, secure it to the skin with a sterile dressing and notify the vascular access team or attending physician. An ultrasound assessment or venogram may be required to rule out a deep vein thrombosis.

Scenario 2: Catheter Fracture or Incomplete Tip Retrieval

• Root Cause: Material fatigue, structural damage caused by the use of sharp instruments (scissors or scalpels) during suture removal, or excessive tensile force applied against resistance during withdrawal.
• Actionable Fix: Immediately apply a manual tourniquet or blood pressure cuff to the patient’s upper arm, proximal to the insertion site, inflating it to a pressure that occludes venous return but preserves the arterial pulse (confirm by checking the radial pulse). This limits venous flow and prevents the fractured catheter segment from migrating into the central venous circulation, right atrium, or pulmonary arteries. Keep the patient completely still and in a supine position. Notify the attending physician and interventional radiology team immediately for emergent fluoroscopic localization and endovascular retrieval.

Scenario 3: Post-Removal Site Hemorrhage or Expanding Hematoma

• Root Cause: Insufficient duration of manual compression, underlying coagulopathy, active anticoagulant or antiplatelet therapy, or premature physical exertion of the affected arm by the patient.
• Actionable Fix: Immediately re-apply firm, direct manual pressure to the insertion site using a fresh sterile 2x2 gauze pad. Maintain uninterrupted pressure for at least 10 to 15 continuous minutes without lifting the gauze to check the site. Once bleeding has stopped, apply a pressurized pressure dressing using a sterile gauze roll or elastic wrap, ensuring it does not compromise distal arterial circulation. Instruct the patient to keep the arm fully immobilized. Review the patient's current laboratory values, paying close attention to Platelet Count, Prothrombin Time (PT), International Normalized Ratio (INR), and Activated Partial Thromboplastin Time (aPTT).

Scenario 4: Localized Site Infection or Purulent Discharge Identified Upon Removal

• Root Cause: Bacterial colonization of the internal or external catheter tract, failure of barrier precautions during maintenance, or a systemic catheter-associated bloodstream infection (CABSI).
• Actionable Fix: Complete the catheter extraction using strict aseptic technique to avoid spreading pathogens into the bloodstream. Once extracted, do not discard the catheter. Using sterile scissors from a suture kit, cut the distal 5 centimeters (2 inches) of the catheter tip directly into a sterile culture specimen container. Secure the container, label it with the patient's identifiers, and send it to the microbiology lab for a catheter tip culture. Cleanse the skin thoroughly with 2% CHG, apply an occlusive dressing, and notify the provider to initiate blood cultures and potential empiric systemic antibiotic therapy.

Frequently Asked Questions

Can a registered nurse remove a midline catheter without a specific medical order?

No. A midline catheter is classified as an invasive vascular access device, and its removal requires a direct order from a licensed independent practitioner (such as a physician, nurse practitioner, or physician assistant). The only exception is if a pre-approved, written institutional emergency protocol is in place to guide management of immediate, life-threatening complications.

How long must the sterile occlusive dressing remain in place after midline removal?

The sterile occlusive dressing must remain undisturbed and dry for at least 24 hours. This duration allows the subcutaneous tract created by the catheter to close and heal, which eliminates the path of entry for atmospheric air and transient skin bacteria into the venous system.

What should I do if a midline catheter tip is missing or torn upon inspection?

If the catheter tip is not fully intact or the measured length is shorter than the documented insertion length, immediately apply a proximal venous tourniquet to the upper arm to prevent any embolization of the fragment. Keep the patient supine, notify the physician immediately, and arrange for an emergency chest radiograph or upper extremity ultrasound to locate the retained foreign body.

Is the Valsalva maneuver required during the removal of a midline catheter?

No, the Valsalva maneuver is generally not required for midline catheter removal. Unlike central venous catheters and PICC lines, the tip of a midline catheter terminates in the peripheral venous system (the axillary vein or below). Consequently, the negative intrathoracic pressure generated during inspiration does not pose the same high risk for air aspiration and venous air embolism.

Can a midline catheter be removed if the patient has an active deep vein thrombosis (DVT) in that arm?

Yes, but the removal must be managed with extreme caution. The presence of a DVT increases the risk of embolizing a portion of the clot during catheter retraction. The clinical team must consult with the vascular access service and the attending physician to determine if therapeutic anticoagulation should be initiated or stabilized before attempting catheter removal.

Enhance Your Clinical Vascular Access Skills

Refining your vascular access techniques is essential for improving patient outcomes and reducing clinical complications. Explore our comprehensive, evidence-based training modules and clinical resources to stay current on the latest infusion therapy guidelines.