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Modeling of geometry and insertion force of a new lancet medical needle

Lancet needle is a typical medical treatment device. Its tip consists of two lancet planes and one bevel plane. When the lancet needle is inserted into soft organ tissue, the insertion force may influence the needle cutting direction and treatment effect and increase the pain. One of the main factor...

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Detalles Bibliográficos
Autores principales: Qi, Yingchun, Jin, Jingfu, Chen, Tingkun, Cong, Qian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10452814/
https://www.ncbi.nlm.nih.gov/pubmed/31818197
http://dx.doi.org/10.1177/0036850419891074
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author Qi, Yingchun
Jin, Jingfu
Chen, Tingkun
Cong, Qian
author_facet Qi, Yingchun
Jin, Jingfu
Chen, Tingkun
Cong, Qian
author_sort Qi, Yingchun
collection PubMed
description Lancet needle is a typical medical treatment device. Its tip consists of two lancet planes and one bevel plane. When the lancet needle is inserted into soft organ tissue, the insertion force may influence the needle cutting direction and treatment effect and increase the pain. One of the main factors affecting this insertion force is the geometry of the needle tip. Based on the research on the shape and processing method of the conventional lancet needle, a new lancet needle tip geometry was obtained by adjusting the relative position of the grinding wheel to the needle. A mathematical model of this new lancet needle was established. The relationship between processing parameters and needle shape was analyzed, and the needle insertion force was predicted. Compared with the conventional lancet needle, the new lancet needle is sharper, and the insertion force on the cutting edge is smaller. However, this change in the grinding position of the needle lancet plane has a great influence on the shape of needle tip near the intersection of the bevel plane and the lancet plane. Some special second bevel angle and rotated angle will cause a large change in the specific force at the intersection place, which is not conducive to reducing the insertion force.
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spelling pubmed-104528142023-08-26 Modeling of geometry and insertion force of a new lancet medical needle Qi, Yingchun Jin, Jingfu Chen, Tingkun Cong, Qian Sci Prog Original Manuscript Lancet needle is a typical medical treatment device. Its tip consists of two lancet planes and one bevel plane. When the lancet needle is inserted into soft organ tissue, the insertion force may influence the needle cutting direction and treatment effect and increase the pain. One of the main factors affecting this insertion force is the geometry of the needle tip. Based on the research on the shape and processing method of the conventional lancet needle, a new lancet needle tip geometry was obtained by adjusting the relative position of the grinding wheel to the needle. A mathematical model of this new lancet needle was established. The relationship between processing parameters and needle shape was analyzed, and the needle insertion force was predicted. Compared with the conventional lancet needle, the new lancet needle is sharper, and the insertion force on the cutting edge is smaller. However, this change in the grinding position of the needle lancet plane has a great influence on the shape of needle tip near the intersection of the bevel plane and the lancet plane. Some special second bevel angle and rotated angle will cause a large change in the specific force at the intersection place, which is not conducive to reducing the insertion force. SAGE Publications 2019-12-10 /pmc/articles/PMC10452814/ /pubmed/31818197 http://dx.doi.org/10.1177/0036850419891074 Text en © The Author(s) 2020 https://creativecommons.org/licenses/by-nc/4.0/This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
spellingShingle Original Manuscript
Qi, Yingchun
Jin, Jingfu
Chen, Tingkun
Cong, Qian
Modeling of geometry and insertion force of a new lancet medical needle
title Modeling of geometry and insertion force of a new lancet medical needle
title_full Modeling of geometry and insertion force of a new lancet medical needle
title_fullStr Modeling of geometry and insertion force of a new lancet medical needle
title_full_unstemmed Modeling of geometry and insertion force of a new lancet medical needle
title_short Modeling of geometry and insertion force of a new lancet medical needle
title_sort modeling of geometry and insertion force of a new lancet medical needle
topic Original Manuscript
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10452814/
https://www.ncbi.nlm.nih.gov/pubmed/31818197
http://dx.doi.org/10.1177/0036850419891074
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