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Epidural space insertion is a common needle surgery for regional anaesthesia, such as labor pain relief and lower extremity surgery. But detection of needle entry into epidural space can be difficult, which currently is highly depended on a hand-feeling skill named loss-of-resistance (LOR). To provide the clinicians with a better real-time visual signal, this paper presents a novel tip force sensing...
A Fabry–Perot interferometric (FPI) sensor based on interferometric intensity-phase modulation is proposed for in vivo force sensing at the tip of a surgical tool for minimally invasive surgeries. To address significant thermal influence, a temperature compensation solution is first developed where two FPI sensors are used, one being subjected only to temperature variation and used to compensate for...
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