Needle insertion phases into soft tissue according to the force signal

Needle insertion phases into soft tissue according to the force signal

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Purpose Percutaneous needle insertion is one of the most common minimally invasive procedures. The clinician’s experience and medical imaging support are essential to the procedure’s safety. However, imaging comes with inaccuracies due to artifacts, and therefore sensor-based solutions were proposed to improve accuracy. However, sensors are usually...

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Context 1
... to the literature [2,3,6,16], three subsequent phases can be distinguished in force during needle puncture (see Fig. 3). Phase 1, a pre-puncture phase, starts when the needle touches the tissue border, resulting in a steadily arising force curve. As soon as tissue breakage starts and a crack is initiated, phase 2 begins. The accumulated energy is released and a sudden drop in force can be observed. Then, in phase 3 (post-puncture), the needle passes ...