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Numerical calculations of temperature distribution resulting from intracavitary heating of the uterus

Persson, Bertil R.R. LU orcid ; Friberg, Britt LU ; Olsrud, Johan LU ; Rioseco, Juan and Ahlgren, Mats LU (1998) In Gynaecological Endoscopy 7(4). p.203-209
Abstract

Objective To estimate, using numerical calculations, the depth of tissue damage in the uterus following balloon thermal endometrial destruction. Design A parameter, therapeutic depth, was defined. This was the maximum depth into the uterine myometrium, from the uterine cavity, at which a predefined temperature was reached after a certain time and with a constant intracavitary temperature. Setting Departments of radiation physics and gynaecology at a university hospital. Results After 30 min of treatment with an intracavitary temperature of 75°C, the maximum depth into the myometrium at which the tissue had been exposed to a temperature of 55°C, when blood flow was neglected, was 8.9 mm. Taking into account blood flow the depth was 3.4... (More)

Objective To estimate, using numerical calculations, the depth of tissue damage in the uterus following balloon thermal endometrial destruction. Design A parameter, therapeutic depth, was defined. This was the maximum depth into the uterine myometrium, from the uterine cavity, at which a predefined temperature was reached after a certain time and with a constant intracavitary temperature. Setting Departments of radiation physics and gynaecology at a university hospital. Results After 30 min of treatment with an intracavitary temperature of 75°C, the maximum depth into the myometrium at which the tissue had been exposed to a temperature of 55°C, when blood flow was neglected, was 8.9 mm. Taking into account blood flow the depth was 3.4 mm, and including the pressure because of the balloon it was 5.6 mm. With the inclusion of a local increase in blood flow because of elevated tissue temperature the depth was 4.4mm. Finally when damage to blood vessels due to coagulation was also accounted for, the depth was 5.2mm. The therapeutic depth decreased only slightly when the treatment time was shortened to 15 min. Conclusions Numerical calculations provide a basis for estimation of the optimal intracavitary temperature and treatment time when performing thermal endometrial destruction by means of a balloon catheter.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Balloon catheter, Endometrial destruction, Finite element method, Menorrhagia, Temperature distribution, Thermal coagulation
in
Gynaecological Endoscopy
volume
7
issue
4
pages
7 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:0031692528
ISSN
0962-1091
language
English
LU publication?
yes
id
3604ca42-3ea3-413d-8233-3b97c7a0226b
date added to LUP
2020-05-12 12:29:05
date last changed
2022-02-01 06:13:17
@article{3604ca42-3ea3-413d-8233-3b97c7a0226b,
  abstract     = {{<p>Objective To estimate, using numerical calculations, the depth of tissue damage in the uterus following balloon thermal endometrial destruction. Design A parameter, therapeutic depth, was defined. This was the maximum depth into the uterine myometrium, from the uterine cavity, at which a predefined temperature was reached after a certain time and with a constant intracavitary temperature. Setting Departments of radiation physics and gynaecology at a university hospital. Results After 30 min of treatment with an intracavitary temperature of 75°C, the maximum depth into the myometrium at which the tissue had been exposed to a temperature of 55°C, when blood flow was neglected, was 8.9 mm. Taking into account blood flow the depth was 3.4 mm, and including the pressure because of the balloon it was 5.6 mm. With the inclusion of a local increase in blood flow because of elevated tissue temperature the depth was 4.4mm. Finally when damage to blood vessels due to coagulation was also accounted for, the depth was 5.2mm. The therapeutic depth decreased only slightly when the treatment time was shortened to 15 min. Conclusions Numerical calculations provide a basis for estimation of the optimal intracavitary temperature and treatment time when performing thermal endometrial destruction by means of a balloon catheter.</p>}},
  author       = {{Persson, Bertil R.R. and Friberg, Britt and Olsrud, Johan and Rioseco, Juan and Ahlgren, Mats}},
  issn         = {{0962-1091}},
  keywords     = {{Balloon catheter; Endometrial destruction; Finite element method; Menorrhagia; Temperature distribution; Thermal coagulation}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{4}},
  pages        = {{203--209}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Gynaecological Endoscopy}},
  title        = {{Numerical calculations of temperature distribution resulting from intracavitary heating of the uterus}},
  volume       = {{7}},
  year         = {{1998}},
}