Nursing care
Expanding groin swelling after femoral cardiac catheterisation
Written and reviewed by Dana Whitfield, RN, MSN · 4 min read · Updated October 2026
Short answer
When swelling expands at a femoral catheterisation site, the first action is firm manual pressure just above the skin puncture, over the artery, while calling for help. Keep the leg straight and the client flat, then check vital signs and the pulses, colour, warmth and sensation of the affected leg. Back or flank pain with hypotension suggests hidden retroperitoneal bleeding.
Pressure first, because the artery is still bleeding
A haematoma that is growing means blood is still leaving the femoral artery into the tissues. Firm, direct manual pressure over the arterial puncture, which usually lies slightly above the skin entry point, is the action that slows that loss. Stay at the bedside, use the call system for help and ask a colleague to take vital signs while pressure continues.
Keep the leg straight and the head of the bed flat or low, because hip flexion strains the puncture. Mark the edges of the swelling so later checks can show whether it is still growing. The provider or interventional team is notified promptly. Ice packs, a sandbag or a pressure dressing alone are weaker choices when swelling is actively enlarging.
What to assess once pressure is in place
Compare the affected leg with the other leg: pedal and posterior tibial pulses, colour, temperature, capillary refill, sensation and movement. A large haematoma can compress nerves and vessels, and arterial complications can reduce blood flow to the foot. New numbness, coolness or colour change below the site is reported urgently.
Check blood pressure, heart rate, level of consciousness and urine output for signs of significant blood loss. Ask about pain at the site and beyond it. Review the anticoagulant and antiplatelet medicines the client received, because they increase bleeding risk, and anticipate a blood count and possibly imaging if the client shows any instability.
Spotting retroperitoneal bleeding you cannot see
Bleeding can track backwards into the retroperitoneal space, especially after a high arterial puncture, producing little or no groin swelling. In a large review of femoral catheterisations, clients with retroperitoneal haematoma had tenderness and fullness above the groin crease, and many had severe back or lower abdominal pain, femoral nerve symptoms and falling haematocrit, with some developing shock.
On the exam, new back or flank pain, lower abdominal pain, hypotension, tachycardia or restlessness after femoral access should prompt escalation even when the groin looks unremarkable. Do not attribute back pain simply to lying flat without assessing vital signs. Treatment may include transfusion, and a small number of clients need urgent intervention.
Distractors, delegation and an original scenario
Imagine a hypothetical client one hour after femoral catheterisation with a firm, enlarging swelling at the groin. The options are to raise the head of the bed for comfort, apply an ice pack and recheck in thirty minutes, check pedal pulses, or apply firm manual pressure above the puncture and call for help. Pressure comes first because bleeding is active.
Checking pulses is important but follows the step that stops blood loss. Raising the head of the bed flexes the hip and can worsen bleeding. Assistive personnel can fetch supplies or take repeat vital signs at the nurse's direction, but the nurse holds pressure, assesses the limb and escalates. Document the size of the swelling, findings and the time of each report.
Ongoing monitoring after bleeding is controlled
Once bleeding is controlled, continue frequent checks of the site, distal pulses and vital signs according to the post-procedure protocol, and compare the marked edges of the swelling each time. Remind the client to keep the leg straight, avoid lifting the head and call immediately if they feel warmth, wetness or new pain at the groin.
Report any recurrence of swelling, a new bruit or pulsating mass, or continuing pain, because these can signal a pseudoaneurysm or ongoing bleeding that needs imaging. Teach before discharge that bleeding at home is managed by lying down and pressing firmly on the site, and that colour change, coolness or numbness in the leg needs urgent attention.
Sources and further reading
PubMed: Retroperitoneal hematoma after cardiac catheterization, prevalence, risk factors and optimal management. Presentation of retroperitoneal haematoma, including suprainguinal fullness, back pain, falling haematocrit and shock, and treatment by transfusion or surgery.
MedlinePlus: Cardiac catheterization discharge. Pressure for site bleeding and reporting colour change, coolness or numbness of the limb below the insertion site.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our cardiovascular practice questions are the closest set to what this page covers.
Common questions
Where should the nurse press for a femoral site bleed?
Directly over the arterial puncture, which is usually slightly above the visible skin entry point, using firm manual pressure while help is called.
Why might a client have back pain after femoral catheterisation?
Back or flank pain may signal retroperitoneal bleeding, which can occur with little groin swelling. Check vital signs and escalate promptly rather than assuming it is positional discomfort.
Should the head of the bed be raised for a client with a groin haematoma?
No. Keep the leg straight and the client flat or as low as the protocol directs, because flexing the hip puts strain on the arterial puncture.
More on cardiovascular
Guides on this