Tag Archives: fna

Biopsy Needle
4
Feb

Overview

Biopsy needles obtain tissue samples under imaging guidance for histologic diagnosis. Needle type gauge and technique are chosen based on lesion location and suspected pathology. Imaging guidance improves targeting and reduces complications.

Needle Types

Core biopsy needles fine needle aspiration and vacuum assisted devices serve different diagnostic needs. Gauge selection balances sample adequacy and bleeding risk. Specialized needles exist for bone liver and lung biopsies.

Imaging Guidance

Ultrasound CT and MRI guide needle placement for accuracy and safety. Real time imaging reduces risk to adjacent structures and improves yield. Post procedure imaging documents complications and sample location.

Sterility and Handling

Sterile technique and single use disposables reduce infection risk. Proper labeling and transport of specimens ensure diagnostic integrity. Training in technique and complication management is essential.

Endoscopic Ultrasound EUS
4
Feb

Overview

EUS combines endoscopy and ultrasound to visualize gastrointestinal wall layers and adjacent structures with the ability to perform fine needle aspiration.

Technique

Radial and linear echoendoscopes provide different views. FNA and FNB enable tissue diagnosis under direct ultrasound guidance.

Clinical Uses

Pancreatic mass evaluation staging of GI cancers and drainage of fluid collections.

Limitations and Safety

Invasive procedure with sedation risks. Requires endoscopic and sonographic expertise.