Fiber-optic Fabry-Pérot interferometers for force sensing on the tip of a needle

Physicians use small variations in the needle insertion force to identify tissue properties and detect membrane punctures during needle insertion. Navigation of a needle towards the target tissue, for example to take a biopsy, is often based on detecting these variations in force. Literature shows that presenting physicians force feedback based...

Force and pressure feedback during epidural needle insertion in the ligamentum flavum of piglets.

Epidural anesthesia is a commonly used anesthesia method during surgery or giving birth to a child. During the insertion of the needle in the back of the patient, the anesthetist has to interpret the different forces which requires extensive skills. To obtain these skills the residents train on patients, which is not without risk. Due to a lot...

Effect of insertion and rotational velocity on friction between catheter and tissue

Purpose: An accurate needle or catheter placement is essential for the success of many procedures like regional anesthesia or biopsy taking. The accuracy of the needle or catheter placement could be increased by application of a rotational motion, which reduces the tissue indentation and required insertion force. Materials and methods: A...