Can You Sue if a Missed Leg Clot Traveled to Your Lungs?

When a Blood Clot Goes Undiagnosed: Your Rights Under Illinois Law

Key Takeaways: Yes, you may be able to sue in Illinois if a provider missed a leg clot (DVT) that later traveled to your lungs, but generally only if the provider fell below the accepted standard of care and that failure caused serious harm or death. You generally must prove duty, breach, causation, and damages. Causation is often the hardest part, because expert physician testimony is usually needed to show that earlier treatment more likely than not would have changed the outcome. Illinois also generally requires an affidavit and a written report from a qualified health professional under 735 ILCS 5/2-622. Hospital peer review materials are generally privileged, but your own medical records are not. If the patient died, the personal representative may bring a wrongful death claim for the spouse and next of kin. Punitive damages are generally not available in medical malpractice cases, and comparative fault may reduce or bar recovery. Claims generally must be filed within 2 years of when you knew or should have known about the injury and no more than 4 years after the negligent act, with limited exceptions. An early legal review is important.

Yes, you may be able to sue if a doctor or hospital missed a leg clot that later traveled to your lungs. In Illinois, a pulmonary embolism misdiagnosis may support a medical malpractice claim when a provider fell below the accepted standard of care and that failure caused serious harm or death. These cases are often hard to win. You generally have to prove what the provider should have done, show that the delay more likely than not made a real difference, and file within strict deadlines. If a loved one died, the family may also bring a wrongful death claim.

If you believe a missed clot harmed you or someone you love, PAUL PADDA LAW can review what happened and explain your options. Call 702-366-1888 or contact us now to talk about your situation.

How a Missed DVT Becomes a Life-Threatening Emergency

Deep vein thrombosis (DVT) is a blood clot that forms in a deep vein, usually in the leg. If the clot breaks loose, it can lodge in the lungs. That blockage is called a pulmonary embolism, and it can cause permanent damage or sudden death.

Many patients who suffer clot complications had earlier warning signs. These may include swelling, pain, warmth, or redness in one leg, along with risk factors such as recent surgery, long periods without moving, pregnancy, cancer, or hormone therapy. When a provider dismisses these symptoms or sends a patient home without proper testing, the clot can keep growing. A malpractice claim usually centers on this window.

Common Ways Providers Miss a Clot

A leg clot misdiagnosis can happen at almost any point in care. These errors often involve:

• Failing to order a duplex ultrasound or D-dimer test when symptoms called for one
• Mistaking DVT symptoms for a muscle pull, cellulitis, or a cyst
• Failing to give preventive blood thinners to high-risk patients
• Dismissing shortness of breath or chest pain as anxiety or a respiratory infection
• Misreading imaging results or not following up on abnormal findings

Proving a Pulmonary Embolism Misdiagnosis Claim

To win a failure to diagnose claim, you generally have to prove four things. First, the provider owed you a duty of care. Second, the provider breached that duty by departing from what a reasonably careful provider would have done. Third, that breach caused your injury. Fourth, you suffered real damages. You can learn more in our guide on failure to diagnose claims in Illinois.

Why Causation Is Often the Hardest Part

Causation is where many blood clot malpractice cases are won or lost. The defense may argue that the clot would have caused the same harm even with timely diagnosis. To answer that, plaintiffs generally need testimony from qualified physicians explaining that, more likely than not, earlier treatment would have prevented or lessened the harm. Illinois does not treat "lost chance" as a separate claim. However, courts may allow recovery when a delay increased the risk of harm or made effective treatment less likely, if proven to a reasonable degree of medical certainty.

The Certificate of Merit Requirement

Illinois generally requires a plaintiff to file an affidavit and a written report from a qualified health professional with a medical negligence complaint. Under 735 ILCS 5/2-622, the report generally must state that there is a reasonable and meritorious cause for filing the case. A qualified reviewer usually has to examine the medical records before filing. A 90-day extension may be available in limited situations, but if the affidavit or report is missing or deficient, the case can be dismissed, so do not count on an extension.

💡 Pro Tip: Ask for complete copies of your medical records, including imaging files, nursing notes, and discharge instructions, as early as possible. Write down when symptoms started and what each provider told you while your memory is fresh.

Internal Hospital Reviews Are Usually Off-Limits

Many families assume a hospital’s internal review of a death will help prove their case, but Illinois law generally protects those reviews. Under 225 ILCS 60/5, people who serve on hospital committees that review care are generally not liable for civil damages unless their conduct was willful or wanton. Separately, the Medical Studies Act (735 ILCS 5/8-2101 et seq.) generally makes peer review and quality-improvement information privileged and inadmissible. That privilege does not cover the underlying medical records or facts available from other sources. Your case usually has to be built from the medical records, testimony, and independent physician review.

When a Missed Clot Leads to Death: Illinois Wrongful Death Claims

If a missed clot traveled to the lungs and the patient died, the family may be able to file a wrongful death lawsuit. Under the Illinois Wrongful Death Act and 740 ILCS 180/1, a party may be liable when a death is caused by a wrongful act, neglect, or default that would have allowed the patient to sue had they lived. The family generally has to prove the same negligence the patient could have proven. The estate may also bring a separate claim under the Survival Act for the patient’s own losses before death, such as conscious pain and suffering and medical expenses.

Who Files and Who Recovers

Under 740 ILCS 180/2(a), the deceased person’s personal representative generally must bring the lawsuit. Any recovery is generally for the exclusive benefit of the surviving spouse and next of kin. The jury may award fair and just compensation for financial losses, as well as for grief, sorrow, and mental suffering.

After trial, the judge generally decides how the award is divided among family members. Under 740 ILCS 180/2, the judge generally holds a hearing to determine each beneficiary’s dependence on the deceased and calculates each share, accounting for any fault reductions. If the deceased left no surviving spouse or next of kin, recovery is generally limited to certain hospital and medical expenses (up to $450 to each provider) and funeral and estate administration expenses, capped at $900 in total, plus a reasonable attorney’s fee.

Limits on Damages

Punitive damages are generally not available in Illinois healing art malpractice cases. Under 735 ILCS 5/2-1115 and 740 ILCS 180/2(a), this bar applies to medical malpractice claims, including wrongful death claims arising from them. Families may pursue compensatory damages, which may include medical bills, lost income and support, future care costs, and emotional losses.

How Comparative Fault May Affect Your Recovery

Illinois uses a modified comparative fault system, so a patient’s own conduct may reduce or bar recovery. Under Section 2-1116 of the Code of Civil Procedure, if the patient was more than 50% at fault, recovery is barred. If the patient was 50% or less at fault, damages are reduced in proportion. A hospital may argue, for example, that the patient ignored discharge instructions about leg swelling or shortness of breath.

A family member’s partial fault does not automatically defeat the whole claim. Under 740 ILCS 180/2, a beneficiary’s own negligence generally affects only that beneficiary’s share. A beneficiary who is 50% or less at fault generally has their share reduced. One found more than 50% responsible generally recovers nothing, while the others may still recover.

Filing Deadlines for an Illinois Malpractice Lawsuit

Illinois sets strict time limits for medical negligence claims, and missing them can end a case before it starts. Under 735 ILCS 5/13-212(a), a claim against a physician, nurse, or hospital generally must be filed within 2 years after the claimant knew, or reasonably should have known, about the injury or death. The statute of repose generally bars any action filed more than 4 years after the negligent act or omission, no matter when the harm was discovered. Limited exceptions apply, such as fraudulent concealment.

The discovery rule and minor tolling do not apply automatically. Courts often interpret these exceptions narrowly. A claim against a government-run hospital may involve different deadlines, notice requirements, or a different forum, such as the Illinois Court of Claims for state facilities. Because timing depends on your facts, it is wise to act quickly.

💡 Pro Tip: The clock may start when you know or reasonably should know about the injury and that it may have been wrongfully caused, which can be before anyone confirms an error. Don’t wait for a hospital to admit an error before seeking a legal review.

Frequently Asked Questions

1. Can I sue if the clot was caught but treatment was delayed?

Possibly. A delayed diagnosis may support a claim if the delay fell below the standard of care and caused additional harm, such as lung damage or a longer recovery.

2. Do I need a medical review before filing?

In most cases, yes. Under 735 ILCS 5/2-622, Illinois generally requires an affidavit and a written report from a qualified health professional.

3. Can I get punitive damages for a missed DVT?

Generally, no. Punitive damages are generally not available in healing art malpractice actions, but compensatory damages may be.

4. What if my loved one ignored some symptoms?

That alone may not defeat the claim. If the patient’s share of fault is 50% or less, damages are reduced. If more than 50%, recovery is barred.

5. How long do I have to file?

Generally, 2 years from when you knew or should have known about the injury, but no more than 4 years from the negligent act under 735 ILCS 5/13-212(a). Exceptions are narrow.

Taking the Next Step After a Missed Clot Diagnosis

A pulmonary embolism misdiagnosis can change a family’s life in an instant, and Illinois law may provide a path to accountability. To succeed, you generally need proof that a provider departed from the standard of care, physician testimony on causation, and a certificate of merit. You also need to file within the 2-year limitations period and the 4-year repose period. An early review of the records can make a real difference. A pulmonary embolism misdiagnosis lawyer can help you understand where your case stands.

If you have questions about a missed or delayed clot diagnosis, PAUL PADDA LAW is here to listen. Call 702-366-1888 or schedule your consultation today to discuss your situation.

Disclaimer: This content is for informational purposes only and is not legal advice. Every case is unique, and results may vary. Consult an attorney about your specific circumstances.