CT-guided CNB
What is a CT-guided CNB?
A Computed Tomography-Guided Core Needle Biopsy (CT-guided CNB) is a minimally invasive diagnostic procedure that uses images obtained through computed tomography (CT) to guide the insertion of a thin needle into a specific lesion or area of the body. This procedure allows tissue samples to be obtained for laboratory analysis.
What is the purpose of this procedure?
A CT-guided CNB is used to:
- Diagnose suspicious lesions: It allows a lesion to be determined as benign or malignant.
- Obtain deep tissue samples: It is especially useful for biopsies of internal organs such as the lungs, liver, kidneys, and bones, among others.
- Guide the treatment: It helps doctors plan specific treatments based on the type of tissue analyzed.
Benefits of the latest technology in a CT-guided CNB
The procedure combines real-time CT imaging with the precision of a fine needle to access the target lesion. The images allow the doctor to locate the lesion and precisely guide the needle, minimizing the risk of damaging nearby structures.
A CT-guided CNB procedure involves:
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Preparation:
Inform your doctor if you are taking blood thinners (anticoagulants) or if you have any allergies to local anesthetics or to the materials used during the procedure. In some cases, you may need to fast beforehand, so it’s important to check with your doctor to find out if this is required. In addition, comfortable and easy-to-remove clothing is recommended as you will be provided with a hospital gown for the procedure.
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During the procedure:
To perform the procedure, you will be asked to lie down on the CT scanner table in a position that allows easy access to the lesion. First, initial images will be taken to accurately locate the area to be treated. Local anesthesia will be applied to the area where the needle will be inserted to minimize discomfort. Guided by real-time CT images, the doctor will carefully insert the needle until it reaches the lesion. Once in position, a small sample of tissue or fluid will be extracted for analysis. The procedure usually lasts between 30 and 60 minutes.
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After the procedure:
After the procedure, they will apply pressure to the area to stop the bleeding and apply a bandage. You may experience mild discomfort in the area, but this usually disappears within a few hours. Strenuous physical activity should be avoided for the first 24 hours. If you notice fever, redness, swelling, or persistent pain in the puncture site, notify your doctor immediately.
Recommendations for the procedure
- Avoid moving: During the procedure, it is important to remain as still as possible to ensure the accuracy of the biopsy.
- Follow instructions: Follow your doctor’s instructions before, during, and after the procedure.
Are there any risks?
A CT-guided CNB is a safe procedure, but there are some risks:
- Mild pain: You may feel pain or discomfort at the puncture site after the procedure.
- Bleeding: There is a small risk of bleeding at the puncture site.
- Infection: Although rare, there is a possibility of infection at the puncture site.
- Pneumothorax (in lung biopsies): In procedures performed on the lungs, there is a low risk of pneumothorax (partial collapse of the lung).
To ensure your procedure runs smoothly, we ask that you arrive before the scheduled time. This will allow us to complete the necessary administrative and clinical preparation.
Before the procedure, we will give you the Informed Consent form, a document with important information that you must read and sign.
If your appointment is for an MRI, it is crucial that you inform us about the presence of pacemakers, metallic objects, prostheses (including dental prostheses), tattoos, or drug infusion devices such as insulin pumps.
