Why Interventional Radiologists Get Sued: The Biopsy, the Bleed, and the Non-Target Embolization

By John Mahoney · June 2026 · 8 min read

Interventional radiology is the specialty that turned imaging into surgery, and its liability follows the needle and the catheter rather than the read. A diagnostic radiologist gets sued for what they missed on a film; an interventional radiologist gets sued for what happened after they advanced a device into a patient under image guidance — a biopsy that bled, an embolic that landed in the wrong vessel, a filter that fractured, a line that dropped a lung. Because these are procedural, consented, often-emergent cases, they look defensible at first glance and then turn on a handful of recurring facts: the coagulation status, the target confirmation, the post-procedure recognition of a complication, and the communication of findings back to the referring team. This guide explains where interventional-radiology liability actually lives, the cannot-miss failures behind it, and what separates a strong case from a weak one — for plaintiff and defense med-mal attorneys.

Disclaimer: This article is for informational purposes only and does not constitute legal advice. The patterns below draw on closed-claims and procedural-complication literature that spans different eras and definitions; treat them as directional, verify against the controlling jurisdiction, and value any individual case on its own record.

The Frequency-and-Severity Reality

Interventional radiology sits in the procedural middle of the malpractice spectrum, distinct from the lower-frequency profile of diagnostic radiology. Because every case involves an invasive maneuver — a needle, a wire, a catheter, an embolic, or an implanted device — the specialty carries a procedural-complication exposure that the reading room does not. Claim frequency for the procedural side is commonly reported as higher than for purely diagnostic imaging, and the underlying complications — bleeding, organ injury, vessel injury, device failure — are the kind that produce concrete, demonstrable harm rather than the abstract "delay" that drives many diagnostic suits.

Severity is medium-to-high and bimodal. Many procedural complications are recognized and managed without lasting injury, and those claims resolve modestly or defend out. But a smaller group produces catastrophic outcomes — non-target embolization causing organ or limb ischemia, a major bleed from a deep biopsy, a tension pneumothorax or air embolism from a line, an IVC filter that migrated or perforated — and those carry the specialty's largest payouts. As with most procedural fields, the single most important valuation variable is not whether a complication occurred (complications are an accepted part of consented procedures) but whether the standard of care was breached in patient selection, technique, recognition, or rescue. Route every intake first to that breach question, because a recognized-and-managed known complication is a very different file from a missed-and-delayed one.

The Dominant Allegation Types

Interventional-radiology claims cluster around the procedure itself, the device, and the communication that surrounds both:

• Bleeding or organ injury from image-guided biopsy and percutaneous drainage — the bread-and-butter exposure: post-biopsy hemorrhage (liver, kidney, lung), inadvertent puncture of bowel or vessel, and drainage-catheter injuries, frequently tied to coagulation status or target selection.
• Non-target embolization causing ischemic injury — embolic material lodging in an unintended vessel or organ, producing tissue, organ, or limb ischemia. Among the highest-severity allegations in the specialty.
• IVC filter migration, fracture, and failure to retrieve — device migration, strut fracture, caval or organ perforation, and — distinctively — failure to remove a retrievable filter when indicated, a recurring follow-up-and-tracking failure.
• Central-line and PICC placement complications — pneumothorax, arterial puncture, catheter malposition, and air embolism, where the harm is often immediate and the technique well-scrutinized.
• Contrast reactions and contrast-induced nephropathy — failure to screen for allergy or renal risk, inadequate premedication or hydration, and management of a contrast reaction.
• Wrong-site / wrong-target procedures — treating or sampling the wrong side, level, or lesion, a never-event category with poor defensibility.
• Lack of informed consent for procedural risk — consent that did not disclose the specific realized risk (bleed, ischemia, pneumothorax, filter complication) or was not obtained appropriately given the elective-versus-emergent posture.

The structural point: an interventional-radiology claim is almost always about a procedural act and its aftermath, not an interpretation. Triage every intake first on which act is at issue — biopsy, embolization, filter, line, or contrast administration — because the relevant standard of care, the expert, and the causation chain differ sharply across them.

The Cannot-Miss Conditions and Failures

The conditions and failures that drive interventional-radiology litigation are:

• Uncorrected coagulopathy before a deep biopsy or drainage. The recurring high-severity bleed case turns on whether the coagulation status was checked and corrected and whether the access route avoided major vessels — and on whether the post-procedure bleed was recognized and treated before it became catastrophic.
• Non-target embolization. Embolic delivered to an unintended territory — causing bowel, organ, skin, or limb ischemia — where the failure is often in catheter position confirmation, embolic sizing, or recognition of reflux.
• Retrievable IVC filter never removed. A filter placed for a temporary indication and then lost to follow-up, later fracturing, migrating, or perforating — a tracking-and-recall failure as much as a device defect.
• Line-placement injury — pneumothorax, arterial puncture, malposition, air embolism. The decisive question is post-placement confirmation: was position verified, was a pneumothorax looked for and recognized, and was the patient positioned to prevent air embolism.
• Contrast injury — an anaphylactoid reaction in an unscreened high-risk patient, or contrast-induced nephropathy where renal risk and hydration were not addressed.
• Wrong-site procedure — a time-out or laterality failure, generally indefensible on the merits.

For the procedural side, the single most actionable screening questions are the pre-procedure question (was the patient appropriately selected and prepared — coagulation, renal function, allergy, indication) and the post-procedure question (was the complication recognized and rescued promptly). A consented, properly performed procedure with a known complication that was caught and managed is defensible; the same complication that was unrecognized for hours, or that should have been prevented by basic screening, is where the value sits. Running beneath all of it is the consultant-and-communication issue: interventional radiologists act on referrals, and a finding or complication that was not clearly reported back to the referring team is a recurring contributing failure.

The Contributing Factors That Drive Payouts

Across interventional-radiology claims, the recurring contributing factors are:

• Patient selection and pre-procedure preparation — uncorrected coagulopathy before a bleeding-prone procedure, unscreened contrast allergy or renal risk, and weak indications for an invasive procedure, all of which reframe a complication as a preventable one.
• Technical performance and target confirmation — access-route choice, catheter and embolic position confirmation, line tip position, and avoidance of non-target territory; the core standard-of-care battleground.
• Recognition and rescue of complications — the costliest lever: a post-biopsy bleed, a pneumothorax, or a non-target embolic ischemia that was not recognized and treated in time, converting a manageable complication into a catastrophic one.
• Device follow-up and tracking — the distinctive interventional-radiology amplifier, most visibly the retrievable IVC filter that was never removed because no system tracked it to retrieval.
• Communication with the referring team and informed consent — failure to report a finding or complication back to the referring physician, and consent that did not disclose the specific realized procedural risk.
• Documentation — incomplete records of indication, coagulation and renal status, consent, time-out, target confirmation, and post-procedure monitoring that weaken the defense.

Two of these are interventional-radiology-specific levers. The first is the rescue window: because procedural complications are expected, the line between a defensible file and a paid claim is frequently whether the bleed, pneumothorax, or ischemia was recognized and treated promptly — the chart's post-procedure timeline often decides the case. The second is the consultant-communication record: an interventional radiologist operates on referral, and a complication or critical finding that was not clearly communicated back to the referring team converts a procedural event into a system-and-communication failure that juries punish. Documentation rarely creates liability here, but it consistently decides whether a claim is paid.

Strong Case vs. Weak Case in Interventional Radiology Malpractice

The same factors grade the file, and the framing is useful to both sides.

What makes an interventional-radiology case strong (plaintiff) / dangerous (defense)

• A deep biopsy or drainage performed on a patient with documented, uncorrected coagulopathy who then suffered a major bleed — a clean patient-selection failure rather than a bolt-from-the-blue complication.
• A non-target embolization causing organ or limb ischemia where the record shows no documented confirmation of catheter position or recognition of reflux, and the ischemic injury was demonstrable and severe.
• A retrievable IVC filter that was never removed because nothing tracked it to retrieval, later fracturing or perforating — a recall-and-follow-up failure with a tangible device injury.
• A line complication — pneumothorax, arterial puncture, or air embolism — that went unrecognized after placement, or a wrong-site procedure with a time-out failure.
• A complication of a type not disclosed on the consent, or a critical finding or complication that was never communicated back to the referring team.

What makes an interventional-radiology case weak (plaintiff) / defensible (defense)

• A consented procedure with documented appropriate patient selection — coagulation, renal function, and allergy screened and addressed — where a known complication occurred despite proper technique.
• A complication that was promptly recognized and rescued, with a clear post-procedure timeline showing timely treatment that limited the harm — the rescue window intact.
• A documented target and laterality confirmation, time-out, and position check, framing a non-target or wrong-site allegation as unsupported by the record.
• A retrievable filter placed with a documented retrieval plan and follow-up, or a contrast event in a patient who was appropriately screened and premedicated.
• A complication that was disclosed on the consent and clearly communicated back to the referring physician, framing the harm as an accepted, well-managed risk rather than negligence.

Interventional radiology rewards a fast, act-specific triage. The case lives or dies on three things: whether the patient was appropriately selected and prepared before the device went in, whether the technique avoided the non-target injury, and — most often the deciding factor — whether the inevitable complication was recognized and rescued in time. Layered over all of it is the consultant's duty to report findings and complications back to the referring team. Whichever side you are on, grading the file means matching the right standard of care to the specific procedural act and pressure-testing the expert who will carry it.

Bottom Line

Interventional radiologists get sued for what their needles and catheters do, not for what they read. The recurring high-value facts are the deep biopsy on an uncorrected coagulopathy, the embolic that landed in the wrong vessel and caused ischemia, the retrievable IVC filter no one tracked to retrieval, the line that dropped a lung or pushed air into the circulation, and the contrast given to an unscreened high-risk patient — each compounded when the complication was not recognized in time or not communicated back to the referring team. Because these are consented, often-emergent procedures, the existence of a complication proves little; the case turns on patient selection, target confirmation, the rescue window, and the consultant's communication duty. Whether you are screening these cases for the plaintiff or defending them, triage first to the specific procedural act, and grade the file on the pre-procedure preparation, the post-procedure timeline, and the documented consent and communication, not on the severity of the injury alone.

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