CARTO Treatment for Gastric Varices

CLINICAL HISTORY: Reason: Pt with cirrhosis and bleeding gastric
varix. Plan for CARTO

COMPARISON: Correlation of prior imaging studies including most
recent CT study

PROCEDURE:
1. Ultrasound-guided access to right common femoral vein.
2. Selective catheterization of left renal vein and venogram.
3. Selective catheterization of left adrenal phrenic trunk and venogram.
4. Superselective catheterization gastrorenal shunt and venogram.
5. Fluoroscopic guided embolization of gastrorenal shunt with detachable microcoils and Gelfoam slurry.

Operator: Dr. ______, interventional radiology attending.

Anesthesia: Local anesthesia with 1% lidocaine solution.

Analgesia: 50 mcg of fentanyl IV.

Fluoroscopic time: 25.9 minutes.

Contrast: 80 mL Omnipaque 300.

Complication: No intraprocedural complication.

Procedure in detail:

After the risks, benefits, and alternatives of procedure explained to the patient, written informed consent was obtained. A procedure timeout was performed as per department protocol. Patient was placed supine on the procedure table and the right groin was prepped and draped in usual sterile fashion.

Real-time physiologic monitoring was provided by qualified radiology nurse for approximately 20 minutes. 1% lidocaine solution was administered subcutaneously. Fentanyl was measured intravenously for analgesia.

With real-time ultrasound guidance access to the right common femoral vein was obtained after multiple exchanges a 9 French Nagare steerable sheath was advanced to the IVC under fluoroscopic guidance advanced into the left renal vein. Left renal venogram demonstrates
normal flow as well as a mildly prominent gastrorenal shunt.

Based upon the above findings a 4 French Navicross catheter and 035 Glidewire were used to selectively catheterize a gastrorenal shunt. This was exchanged for a balloon occlusion catheter and a retrograde venogram was performed outlining the venous anatomy including a
parallel ingress vessel adjacent to the each egress vessel communicating with the portal vein.

Based upon the above findings a 4 French Navicross catheter was advanced further into the shunt near the gastric cardia and the second Navicross catheter was advanced approximately 4cm proximal to the first metacarpal as catheter. Both catheters were confirmed to be
in satisfactory position with selective venograms.

The proximal catheter was utilized to embolize the gastrorenal shunt using a CX Azur coils including 13 mm x 24 cm, 10 mm x 19 cm, and 8 mm x 24 cm. This is followed by Azur Hydrocoil measuring 4 mm x 10 cm.

Subsequently Gelfoam slurry mix of contrast was injected through the more distal catheter into the gastric varices fluoroscopic guidance. Once stasis was obtained and there was good coverage throughout the gastric varices, both catheters were removed under fluoroscopic
guidance. The sheath was also subsequently removed under fluoroscopic guidance.

Hemostasis was achieved with manual compression. Sterile dressing was applied.

Patient was transferred to recovery in stable condition.

Impression:

Fluoroscopically guided retrograde transvenous obliteration of gastric varices using CARTO technique as described above.

PLAN: Patient to follow-up with abdominal CT to verify durable thrombosis of gastric varices. This will be followed with endoscopic surveillance.

Frequently Asked Questions

What is CARTO treatment for gastric varices?

CARTO, or Coil-Assisted Retrograde Transvenous Obliteration, is a minimally invasive procedure used to treat gastric varices, often in patients with cirrhosis. It involves embolizing the veins that supply the varices using coils and Gelfoam to prevent bleeding. The procedure is performed under fluoroscopic guidance and typically requires local anesthesia and sedation.

How is the CARTO procedure performed?

The CARTO procedure involves accessing the right common femoral vein with ultrasound guidance, then navigating catheters through the veins to the gastrorenal shunt. Using fluoroscopy, the veins are embolized with microcoils and Gelfoam to block blood flow to the varices. The procedure is monitored in real-time to ensure effectiveness and patient safety.

What are the risks associated with CARTO treatment?

CARTO treatment, like any medical procedure, carries some risks, including bleeding, infection, and reactions to contrast dye. However, major complications are rare. The procedure is performed by experienced interventional radiologists, and patients are monitored closely to minimize risks.

What is the recovery process after CARTO treatment?

After CARTO treatment, patients are monitored in a recovery area to ensure stability. They may experience some discomfort at the site of catheter insertion. Follow-up includes imaging studies like CT scans to confirm the success of the treatment and endoscopic surveillance to monitor the varices.

Why is CARTO used for patients with gastric varices?

CARTO is used for gastric varices because it effectively reduces the risk of bleeding, which can be life-threatening. Gastric varices are often associated with portal hypertension due to cirrhosis. By embolizing the veins supplying the varices, CARTO helps to manage this condition without the need for more invasive surgery.

What are gastric varices and how do they form?

Gastric varices are dilated veins in the stomach that can occur when blood flow to the liver is obstructed, often due to cirrhosis. This obstruction increases pressure in the portal vein system, leading to the formation of varices. These can rupture and cause severe bleeding, necessitating treatments like CARTO.

What is the role of fluoroscopy in the CARTO procedure?

Fluoroscopy provides real-time X-ray imaging during the CARTO procedure, allowing the interventional radiologist to guide catheters precisely to the target veins. It ensures accurate embolization of the veins and helps in monitoring the procedure's progress and effectiveness.

What alternative treatments exist for gastric varices?

Besides CARTO, other treatments for gastric varices include endoscopic variceal ligation, sclerotherapy, and surgical shunts. The choice of treatment depends on the patient's condition, severity of the varices, and the presence of any complications. Each option has its own risks and benefits, which should be discussed with a healthcare provider.

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