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Abstract
Background: The use of intravaginal Foley balloons in addition to conventional packing during high - dose - rate (HDR) tandem and ovoids intracavity brachytherapy (ICBT) in definitive radiotherapy cervical cancer in order to reduce dose to the bladder, rectum, thus reducing dose - dependent complications.
Methods: 202 HDR - ICBT procedures perfomed for 61 patients with stage IB3 - IVA. Intracavity HDR with Utrecht applicator (Nucletron, Veenendaal, The Netherlands). An uninflated Foley balloon was inserted into vaginal above ovoids. Vaginal packing was inserted between the tandem and rectum. CT simulation images were then obtained with 7ml of water inflated and with deflated Foley balloons. Maximum dose to 0.1, 1 and 2 cm3 volumes for the bladder and rectum were analyzed and compared between inflated and deflated balloons using parametric statistical analysis.
Results: Inflation of intravaginal balloons allowed significant reduction of dose to the bladder and rectum. Amount of reduction was dependent on the anatomy of the patient and the placement of the balloons. Displacement of the organs at risk by the balloons allowed an average of 12.7% reduction in dose to the bladder (D2cc) and 5.1% to the rectum (D2cc).
Conclusions: For patients undergoing HDR - ICBT, a significant dose reduction to the bladder and rectum could be achieved with further displacement of these structures using intravaginal Foley balloons in addition to conventional vaginal packing.
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| Published | 27-07-2022 | |
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| Issue | No. 82 (2022) | |
| Section | Original article | |
| DOI | 10.38103/jcmhch.82.10 | |
| Keywords | Bóng sonde Foley, kỹ thuật chèn gạc âm đạo, xạ trị trong hốc, suất liều cao, ung thư cổ tử cung Foley balloon catheter, Vaginal packing tehnique, Intracavity brachytherapy, High - dose - rate, cervical cancer |
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