PROCEDURES PERFORMED: CT-guided drainage of abscess
CLINICAL HISTORY:
COMPARISON: No previous study available for comparison.
CT Dose:
SEDATION: Monitored by the IR registered nurse or surrogate, an independent trained observer providing Moderate Sedation with fentanyl.
CONSENT: Following discussion procedure its risks benefits (including bleeding and vessel damage) and alternatives, review of readily available relevant imaging prior to the procedure informed consent was obtained witnessed and documented upon the chart. Standard presurgical timeout confirming patient procedure and when relevant side and site was performed. Any discrepancies were resolved via consultation with appropriate readily available data sources. The patient was prepared and draped in standard sterile fashion.
ANESTHESIA: 1% lidocaine for local anesthesia.
DESCRIPTION OF PROCEDURE: After obtaining informed consent, the patient was prepped and draped in the usual sterile manner in position on the CT table. The CT images were then used to mark the puncture site in the . After applying local anesthesia and making a small incision, a 22-gauge Chiba needle was advanced into the abscess cavity. Aspiration yielded frank pus. Subsequently a microwire was placed through the needle and upsized to an 035 wire utilizing a transitional catheter. Wire positioning was confirmed with CT images and over the wire a new 8-French drainage catheter was advanced into the abscess cavity. The catheter was connected to an accordion bag for continuous drainage. The fluid sample was sent to the laboratory for culture analysis. The patient tolerated the procedure without any immediate complications.
FINDINGS: Successful CT-guided drainage of abscess
IMPRESSION:
Successful CT-guided drainage of abscess
Frequently Asked Questions
What is CT-guided abscess drainage?
CT-guided abscess drainage is a minimally invasive procedure that uses computed tomography (CT) imaging to help guide a needle into an abscess, allowing for the drainage of pus. This technique helps ensure precise needle placement, reducing the risk of complications and improving the success rate of the procedure.
How is a patient prepared for CT-guided abscess drainage?
Before the procedure, the patient gives informed consent after discussing the risks and benefits. The patient is then positioned on the CT table, and the skin is cleaned and draped in a sterile manner. Local anesthesia, typically 1% lidocaine, is administered to numb the area where the needle will be inserted.
What are the risks of CT-guided abscess drainage?
While generally safe, CT-guided abscess drainage carries risks such as bleeding, infection, damage to nearby structures, and allergic reactions to medications. These risks are minimized by using CT imaging for precise needle placement and following strict sterile techniques.
What happens after a CT-guided abscess drainage procedure?
After the procedure, the patient is monitored for any immediate complications. The drainage catheter remains in place to allow continuous drainage of the abscess. Samples of the drained fluid are sent to a lab for culture analysis to identify any bacteria present, which helps guide antibiotic treatment.
How long does CT-guided abscess drainage take?
The procedure typically takes between 30 minutes to an hour. The exact duration depends on factors like the abscess's size and location. Preparation and monitoring may add additional time to the overall process.
Is CT-guided abscess drainage painful?
Patients may experience some discomfort, but local anesthesia is used to numb the area. During the procedure, a small incision is made, and a needle is inserted. Most patients report feeling pressure rather than pain.
Why is a CT scan used in abscess drainage?
A CT scan provides detailed images of the body's internal structures, allowing for precise localization of the abscess. This helps guide the needle accurately into the abscess cavity, minimizing the risk of injury to surrounding tissues and ensuring effective drainage.
What is the role of the drainage catheter in CT-guided abscess drainage?
The drainage catheter is inserted into the abscess cavity over a guidewire to facilitate continuous drainage of pus. It is connected to an accordion bag, which collects the fluid. This setup helps reduce the abscess size and promotes healing.