Abstract
This study reports on the effects of insertion velocity, needle tip geometry and needle diameter on tissue deformation and maximum insertion force. Moreover, the effect of multiple insertions with the same needle on the maximum insertion force is reported. The tissue deformation and maximum insertion force strongly depend on the insertion velocity and the tip geometry. No correlation was found between the outer diameter and the maximum insertion force for small needles (30G – 32G). The endurance experiments showed no remarkable difference in the maximum insertion force during 100 insertions.
Highlights
Each year, more than 350.000 new cases of oral cavity cancer are diagnosed, with a mortality rate of >175.000 per year [1]
This study reports on the effects of insertion velocity, needle tip geometry and needle diameter on tissue deformation and maximum insertion force
For most of the tested needles, the insertion is accompanied by multiple puncture events that can be identified by several peaks in the force profile
Summary
More than 350.000 new cases of oral cavity cancer are diagnosed, with a mortality rate of >175.000 per year [1]. Squamous cell carcinoma (SCC) counts for 90% of the cancers of the oral cavity [2]. The primary treatment for this type of cancer is surgery. The goal of surgery is the complete removal of the tumor with an adequate resection margin (> 5 mm of healthy tissue surrounding the tumor). Resection margins are an important prognostic factor. Patients with adequate re sections have less local recurrence of the tumor and improved overall survival [3,4,5,6,7,8,9]
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