eISSN: 2081-2841
ISSN: 1689-832X
Journal of Contemporary Brachytherapy
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3/2017
vol. 9
 
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abstract:
Original paper

The usefulness of fleet rectal enemas on high-dose-rate intracavitary cervical cancer brachytherapy. A prospective trial

Ignacio Andres
,
Manuel Gutierrez-Perez
,
Maria Pilar Rodriguez-Vela
,
Roberto Berenguer
,
Marimar Sevillano
,
Manuel Aguayo
,
Meritxell Arenas
,
Angeles Rovirosa
,
Yashmina Murria-Perez
,
Sebastia Sabater

J Contemp Brachytherapy 2017; 9, 3: 224–229
DOI: https://doi.org/10.5114/jcb.2017.68135
Online publish date: 2017/05/30
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Purpose: To evaluate the effects of rectal enemas on rectal doses during radical high-dose-rate (HDR) intracavitary cervical brachytherapy (BT).

Material and methods: Twenty patients suffering from cervical cancer and treated with external beam radiotherapy and HDR-BT were included in a prospective trial. The first brachytherapy fraction was considered the basal status, and patients were instructed to self-administer two rectal cleansing enemas before the second fraction. Dose-volume histogram (DVH) values were generated for the rectum and correlated with rectal volume variation. Brachytherapy was carried out with a Fletcher or Utrecht applicator.

Results: No significant rectal volume differences were observed between fractions with or without rectal enemas (without, 52.64 ± 15.92 cc; with, 53.16 ± 19.28 cc). There was a significant correlation between both rectal volumes

(r = 0.722, p = 0.001). No significant differences were observed in analyzed DVH parameters (median values: ΔD0.1cc, 4.17 vs. 3.61 Gy; ΔD1cc, 3.23 vs. 2.87 Gy; ΔD2cc, 2.9 vs. 2.54 Gy; ΔD5cc, 2.35 vs. 2.05 Gy, for no enema and enema fraction, respectively). No significant rectal volume differences nor DVH parameter differences were observed according the applicator type.

Conclusions: Our rectal enemas protocol prior to HDR-BT was ineffective in significantly modifying rectal DVH parameters. No differences were observed according to the type of applicator used.
keywords:

cervical brachytherapy, cervical cancer, dose-volume histogram, rectal enema

  
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