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Multilayered numerical modelling of bio-thermal aspects during laser assisted treatment of internal haemorrhoid developed in rectum.

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Title: Multilayered numerical modelling of bio-thermal aspects during laser assisted treatment of internal haemorrhoid developed in rectum.
Authors: Dutta, Jaideep1 (AUTHOR) jaideep.dutta@mechresearch.net.in
Source: Lasers in Medical Science. 2/19/2025, Vol. 40 Issue 1, p1-10. 10p.
Subjects: Heat radiation & absorption, Finite difference method, Laser therapy, Hemorrhoids, Gaussian beams
Abstract: Haemorrhoids are swollen blood vessels developed around the anus. Internal haemorrhoids are generally not visible from outside due to its growth inside the rectum and it is generally considered as painless. However, a prolapsed internal haemorrhoid may cause discomfort, pain and irritation. For the treatment of internal haemorrhoid, laser assisted therapy would be helpful due to its rooted advantages such as post-surgery minimal pain, lesser bleeding, quicker healing, shorter recovery period, shorter surgical and overall treatment duration, lower risk of recurrence and least risk of post-surgical infections. The genesis of present research work deals with the development of mathematical modelling to capture the bio-thermal response during laser assisted therapy of internal haemorrhoid developed in the rectum. The explicit form of finite difference method is employed as numerical tool for the mathematical study and the physical domain is considered as multilayered tissue (three different layers of rectum: muscle, submucosa and mucosa). A Gaussian laser beam is considered as heat source to destroy the abnormal growth inside the rectum. Temperature variation in multi-layered tissue is investigated for laser heat input and absorption radius along the temporal and spatial coordinate. Temperature drop has been evidenced in the interfaces of multi-layered rectum tissue. The research outcome is verified with the published numerical model with negligible variation. [ABSTRACT FROM AUTHOR]
Copyright of Lasers in Medical Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Multilayered numerical modelling of bio-thermal aspects during laser assisted treatment of internal haemorrhoid developed in rectum.
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  Data: <searchLink fieldCode="AR" term="%22Dutta%2C+Jaideep%22">Dutta, Jaideep</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jaideep.dutta@mechresearch.net.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Lasers+in+Medical+Science%22">Lasers in Medical Science</searchLink>. 2/19/2025, Vol. 40 Issue 1, p1-10. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Heat+radiation+%26+absorption%22">Heat radiation & absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+difference+method%22">Finite difference method</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+therapy%22">Laser therapy</searchLink><br /><searchLink fieldCode="DE" term="%22Hemorrhoids%22">Hemorrhoids</searchLink><br /><searchLink fieldCode="DE" term="%22Gaussian+beams%22">Gaussian beams</searchLink>
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  Data: Haemorrhoids are swollen blood vessels developed around the anus. Internal haemorrhoids are generally not visible from outside due to its growth inside the rectum and it is generally considered as painless. However, a prolapsed internal haemorrhoid may cause discomfort, pain and irritation. For the treatment of internal haemorrhoid, laser assisted therapy would be helpful due to its rooted advantages such as post-surgery minimal pain, lesser bleeding, quicker healing, shorter recovery period, shorter surgical and overall treatment duration, lower risk of recurrence and least risk of post-surgical infections. The genesis of present research work deals with the development of mathematical modelling to capture the bio-thermal response during laser assisted therapy of internal haemorrhoid developed in the rectum. The explicit form of finite difference method is employed as numerical tool for the mathematical study and the physical domain is considered as multilayered tissue (three different layers of rectum: muscle, submucosa and mucosa). A Gaussian laser beam is considered as heat source to destroy the abnormal growth inside the rectum. Temperature variation in multi-layered tissue is investigated for laser heat input and absorption radius along the temporal and spatial coordinate. Temperature drop has been evidenced in the interfaces of multi-layered rectum tissue. The research outcome is verified with the published numerical model with negligible variation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Lasers in Medical Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10103-025-04355-5
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      – Code: eng
        Text: English
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      – SubjectFull: Heat radiation & absorption
        Type: general
      – SubjectFull: Finite difference method
        Type: general
      – SubjectFull: Laser therapy
        Type: general
      – SubjectFull: Hemorrhoids
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      – SubjectFull: Gaussian beams
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      – TitleFull: Multilayered numerical modelling of bio-thermal aspects during laser assisted treatment of internal haemorrhoid developed in rectum.
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              Text: 2/19/2025
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              Y: 2025
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