Removing a midline catheter is a straightforward bedside procedure when done correctly, but it still requires attention to patient positioning, steady technique, and post-removal monitoring to avoid complications like bleeding, catheter fracture, or infection. Unlike peripherally inserted central catheters (PICCs), midline catheters sit in the peripheral vasculature of the upper arm rather than advancing into the central veins near the heart, which makes removal simpler in most respects. That said, midline catheters can dwell for weeks, and the longer they stay in, the more the body can form fibrin around the tip, creating the potential for resistance during removal.
Preparation and Assessment Before Removal
Before touching the catheter, gather your supplies: clean gloves, gauze pads, an occlusive dressing, a sterile specimen container if a catheter tip culture is ordered, sterile scissors, and an adhesive bandage or transparent dressing for the site afterward. Review the patient’s chart for any signs of catheter-related complications during the dwell period, particularly documented bloodstream infections, localized swelling, or ultrasound findings of thrombosis. If the patient has been receiving an infusion, stop it and disconnect the line before removal.
Check the insertion site for redness, swelling, drainage, or tenderness. These signs don’t prevent you from removing the catheter, but they do change what you do with it once it’s out. A red, warm, or purulent insertion site is a strong reason to send the catheter tip for culture. Also confirm that the catheter length documented at insertion matches what you should expect to see coming out. Knowing the original insertion length is one of the best tools you have for verifying that the entire catheter was retrieved intact.
Why Patient Positioning Matters
For central venous catheter removal, placing the patient flat or in the Trendelenburg position (head lower than the feet) is standard practice to reduce the risk of air embolism. The negative pressure generated in the thorax during inspiration can theoretically draw air through the catheter tract and into the vein. This risk is well documented with central lines: a case report described a patient who suffered a paradoxical systemic air embolism during CVC removal, with echocardiography revealing multiple air bubbles and an undiagnosed atrial septal defect that allowed the air to cross into the arterial circulation.1PubMed Central. Massive air embolism while removing a central venous catheter
Midline catheters, because their tips sit in peripheral upper-arm veins rather than in the superior vena cava, carry a lower inherent risk of clinically significant air embolism than central lines. Still, many hospital protocols extend the same positioning precautions to midline removal, and there’s little downside to doing so. Having the patient lie flat with the arm at or slightly below heart level is reasonable. Ask the patient to exhale gently or hum during the final pull, both of which raise intrathoracic pressure and reduce venous suction at the insertion site. If your facility’s policy specifies Trendelenburg positioning for midline removal, follow it.
Step-by-Step Removal Technique
With the patient positioned and your supplies at hand, the actual removal is usually quick. Here is the general sequence most clinicians follow:
- Remove the dressing: Peel the transparent film and any stabilization device away from the skin carefully. Adhesive residue around the site is normal and can be cleaned afterward. Avoid tugging the catheter while removing the dressing.
- Clean the site: Use antiseptic (chlorhexidine or alcohol swab) around the insertion point. This reduces the chance of dragging skin flora into the tract during removal.
- Withdraw slowly: Grasp the catheter hub or the catheter itself close to the skin and pull with gentle, steady traction. Do not jerk or use force. A midline catheter is typically 8 to 20 centimeters long, and you should feel it sliding out smoothly. Maintain traction in the same direction the catheter was inserted (roughly parallel to the vein), not at an angle.
- Apply pressure immediately: As soon as the catheter is out, press sterile gauze firmly over the insertion site. Hold pressure for at least two to three minutes, or longer if the patient is on anticoagulants or has a coagulopathy.
- Inspect the catheter tip: Confirm the catheter is intact and complete. Measure the length against the documented insertion length. If the catheter appears shorter than expected or the tip looks ragged, you have a potential fracture situation.
- Apply an occlusive dressing: Once hemostasis is achieved, cover the site with sterile gauze and an occlusive dressing. Some protocols call for keeping the dressing in place for 24 to 48 hours.
The entire removal generally takes under a minute once the dressing is off. Document the catheter length, the condition of the insertion site, whether the tip was sent for culture, and the patient’s tolerance of the procedure.
What to Do If You Meet Resistance
Occasionally, a midline catheter won’t come out easily. The most common reason is a fibrin sheath, a thin layer of protein and cellular material that the body deposits along the outside of the catheter during its dwell time. This sheath can anchor the catheter to the vein wall, making it feel “stuck” when you pull. The longer the catheter has been in place, the more substantial this adhesion can become.
If you feel resistance, stop pulling. Increasing force is the worst thing you can do because it raises the risk of fracturing the catheter and leaving a fragment inside the vein. Instead, try applying gentle, sustained traction for 30 to 60 seconds while the patient relaxes the arm. Sometimes the fibrin releases with patience. Warm compresses over the upper arm can also help by promoting vasodilation. If the catheter still won’t move, stop the attempt and notify the provider. In cases involving deeply embedded or implanted catheters, published techniques have used guidewire insertion to straighten the catheter and a “push-in” maneuver to detach adhesions from the vein wall before reattempting removal.2PubMed. A new technique to remove a “stuck” totally implantable venous access catheter These interventions are beyond typical bedside scope and usually require imaging guidance, but they illustrate that there are escalation options when gentle traction alone fails.
Never cut a midline catheter externally and leave a portion in the vein. Never attempt to flush a stuck catheter forcefully in hopes of dislodging it. Both carry serious risks. If the catheter truly cannot be removed at the bedside, interventional radiology may need to get involved.
Catheter Fracture and Fragment Embolization
Catheter fracture during removal is uncommon, but the consequences can be serious. If a catheter breaks and a fragment enters the bloodstream, it can migrate through the venous system and potentially lodge in the pulmonary vasculature, causing a pulmonary embolism. One published case series on entrapped port catheter removal documented a patient in whom traction caused the catheter to rupture during attempted removal. Interventional radiology was able to retrieve most of the fragment using a snare device threaded through the femoral vein under fluoroscopic guidance, though a small distal piece remained and caused a limited pulmonary embolism.3Il Giornale di Chirurgia – Journal of the Italian Surgical Association. Surgical challenges in the removal of entrapped port-a-caths: a case series of 3 patients
If you suspect a catheter has fractured during removal, the response should be immediate. Apply a tourniquet or firm manual compression proximal to the insertion site (between the fracture point and the heart) to help prevent a loose fragment from migrating further into the venous system. Immobilize the affected arm and keep the patient still.4PubMed Central. Nursing vigilance in preventing catheter fragment migration: a dual case report of peripheral venous catheter fractures in pediatric practice Imaging, typically a chest X-ray or CT scan, is needed to locate the retained fragment. Retrieval almost always requires interventional radiology.
The good news is that midline catheters made from modern polyurethane are less prone to fracture than older silicone designs. In a study comparing tunneled infusion catheters, breakage occurred in about 8% of silicone catheters but in none of the polyurethane catheters tested.5PubMed. Silicone and polyurethane tunneled infusion catheters: a comparison of durability and breakage rates Most midline catheters used in current practice are polyurethane, which partly explains why fracture during routine removal is rare. That said, any catheter that has been in place for an extended period, has been kinked repeatedly, or shows visible external damage deserves extra caution during removal.
When to Culture the Catheter Tip
Not every midline catheter tip needs to be sent for culture. Routine culturing of catheter tips in the absence of clinical suspicion for infection is generally discouraged because it leads to false positives and unnecessary antibiotic use. The standard approach is to culture the tip only when there is a clinical reason to suspect catheter-related bloodstream infection: unexplained fever, bacteremia without another clear source, or local signs of infection at the insertion site like purulence or significant erythema.
If you are sending the tip for culture, use sterile technique. After removing the catheter, hold the tip over a sterile container and use sterile scissors to cut the distal 5-centimeter segment directly into the container without letting it touch any non-sterile surface. The lab uses a semi-quantitative method (rolling the segment across a culture plate) to determine whether significant colonization is present. Coordinating the tip culture with peripheral blood cultures drawn before removal gives the most useful diagnostic information, as it allows the lab to compare the organisms and colony counts between the two samples.
Thrombosis Risk and What to Watch For
Midline catheters are associated with catheter-related thrombosis at a rate that, while lower than some other devices, is not trivial. A systematic review of complications associated with midline and long peripheral catheters found that symptomatic catheter-related thrombosis occurred at a cumulative rate of roughly 0.9 per 1,000 catheter-days for midline catheters, based on aggregated data from over 5,000 devices.6Thrombosis Research. Complications associated to midline- and long peripheral catheters in adults. Systematic review of literature and proposal for a standardized model for data collection These thromboses were typically diagnosed by ultrasound showing echogenic material inside an incompressible vein.
Thrombosis can be present at the time of removal even if the patient hasn’t reported symptoms. After removing a midline catheter, monitor the patient for new arm swelling, pain, redness, or a visible cord along the vein. These signs appearing in the hours or days after removal warrant an ultrasound. The removal itself can occasionally dislodge thrombus material, though clinically significant embolism from midline catheter removal is rare given the peripheral location of these devices.
Patients who are at higher baseline risk for venous thromboembolism, including those with active cancer, a history of deep vein thrombosis, or prolonged immobility, deserve closer monitoring after removal. If a thrombus is identified, treatment decisions depend on its extent and location and typically involve anticoagulation therapy.
Post-Removal Site Care
Once the catheter is out and hemostasis is confirmed, the insertion site needs a brief but real recovery period. The small wound left by the catheter tract can serve as an entry point for bacteria, so keeping the occlusive dressing clean and dry for 24 to 48 hours matters. Instruct the patient to avoid submerging the arm in water (no baths or swimming) until the site has fully closed, which usually takes one to two days.
A small amount of oozing or bruising around the site is normal, especially if the catheter was in place for several weeks. A pea-sized hematoma is nothing to worry about, but expanding bruising, persistent bleeding that soaks through the dressing, or new warmth and redness developing at the site after a day should be reported to a clinician. Similarly, if the patient develops a fever within 48 hours of removal that lacks another obvious explanation, it’s worth investigating a possible catheter-related infection and referencing any tip culture results that may be pending.
How Dwell Time Affects Removal
The longer a midline catheter has been in place, the more the body incorporates it into the local tissue environment. Fibrin accumulation along the catheter surface begins within hours of insertion, but it thickens progressively over days and weeks. After a few weeks, some catheters develop a fibrin sheath substantial enough to create palpable resistance during withdrawal. This doesn’t mean that long-dwell catheters are dangerous to remove. It does mean that clinicians removing a catheter that has been in place for three or four weeks should be prepared for the possibility of resistance and should avoid reflexively increasing force when they feel it.
Catheter material also plays into this. Polyurethane softens slightly at body temperature, which is generally an advantage during removal because a more pliable catheter is less likely to irritate the vein wall or fracture under traction. Silicone catheters, while softer initially, have historically shown higher breakage rates during prolonged use.5PubMed. Silicone and polyurethane tunneled infusion catheters: a comparison of durability and breakage rates If you’re removing an older-style silicone catheter that has been in place for months, take extra care with your traction and have a low threshold for stopping and escalating to a provider experienced in difficult catheter removals.
There’s no universal maximum dwell time after which a midline catheter becomes inherently unsafe to remove at the bedside. Most institutions manage midline catheters for up to four weeks before reassessing the ongoing need, but clinical scenarios vary. The key variable is not the calendar but the catheter’s condition and the resistance you encounter when you start to pull.
Common Mistakes During Midline Removal
A few errors come up repeatedly in clinical practice and are worth calling out specifically:
- Yanking against resistance: This is the single most consequential mistake. Forceful traction on a stuck catheter can fracture it, and a retained fragment inside the venous system turns a routine bedside procedure into an interventional radiology case. Steady, gentle traction with patience is the standard. If that fails, stop.
- Skipping the length check: Failing to measure the removed catheter against the documented insertion length means you might miss a fracture entirely. The patient could leave the facility with a catheter fragment in their vein and no one would know until symptoms appeared, if they appeared at all.
- Removing during active infusion: Always stop the infusion and disconnect the line before pulling. Removing the catheter while fluid is still running creates a mess, increases infection risk, and can obscure your view of the insertion site.
- Inadequate pressure after removal: Particularly in anticoagulated patients, holding pressure for less than two minutes often leads to prolonged oozing and hematoma formation. Three to five minutes of steady pressure is safer for these patients.
- Contaminating the tip before culture: If a tip culture is ordered, touching the catheter tip to the bedsheet, the patient’s skin, or your gloves before getting it into the sterile container renders the culture unreliable. Handle the distal segment with sterile technique throughout.
None of these mistakes are exotic or unlikely. They happen because midline removal is perceived as simple, and that perception can breed complacency. The procedure is simple, but “simple” and “impossible to get wrong” are different things.