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Gynecological technical notes for appropriate spacer injections
Mariko Nakahara1, Naoya Murakami2, Takahito Chiba3
1Department of Gynecology, National Cancer Center Hospital, Tokyo, Japan.
Brachytherapy
|December 1, 2023
Summary
Anatomical insights guide safe spacer injections for gynecologic brachytherapy, potentially reducing radiation dose to normal tissues and minimizing adverse events.
Area of Science:
- Gynecologic Oncology
- Radiation Oncology
- Surgical Anatomy
Background:
- Adherence to dose constraints in brachytherapy is crucial for preventing late adverse events.
- Spacers may reduce radiation dose to rectal and bladder tissues, similar to prostate radiotherapy.
- Optimal anatomical placement for gynecologic brachytherapy spacers is not well-defined.
Purpose of the Study:
- To provide anatomical guidance for maximizing spacer effectiveness in gynecologic brachytherapy.
- To describe technical details for safe and replicable spacer injection.
Main Methods:
- Discussion of anatomical considerations of the vesicovaginal and rectovaginal septa.
- Description of spacer injection techniques, including ultrasound guidance.
- Consideration of anatomical changes post-hysterectomy.
Main Results:
- Spacer injection resistance varies due to the non-uniform nature of the vesicovaginal and rectovaginal septa.
- Ultrasound guidance and injection into the incision layer during radical hysterectomy are recommended.
- Artificial ascites may prevent post-hysterectomy adhesion of the intestinal tract.
Conclusions:
- Anatomical and surgical perspectives are essential for safe and effective spacer injection.
- Standardized techniques can improve the therapeutic administration of spacers in gynecologic brachytherapy.
Keywords:
BrachytherapyCervical cancerGynecological cancerRadiation oncologySpacer injectionUterine cancerVaginal recurrence
