Sampling steps for biopsy needles

The first step: the hollow needle and the solid needle are punctured into the soft tissue together, and the positioning is achieved before reaching the target position;

Step 2: The solid needle is still, and the hollow needle continues to puncture the soft tissue forward until it reaches the target position;

Step 3: After the hollow needle obtains the biopsy tissue at the target position, the tissue sample and the biopsy needle are withdrawn to the outside of the soft tissue together by vacuum adsorption [1]. as shown in picture 2.

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