Implantation guide device for cervical cancer brachytherapy minimally invasive surgery

Abstract

The invention discloses an implantation guide device for a cervical cancer brachytherapy minimally invasive surgery. The implantation guide device comprises a cylindrical needle passage guide post anda flat implantation protection wing, the implantation protection wing is fixedly arranged on the outer side of the tail end of the needle passage guide post, and a main guide needle passage is arranged in the needle passage guide post. Corresponding CT (computed tomography) data of a pelvic cavity and a vagina are acquired before the surgery, an interstitial implantation template is printed in a3D (three-dimensional) manner by a system and provided with a set needle passage, the interstitial implantation surgery can be more effectively and rapidly performed, so that radiotherapy dose distribution is more reasonable, the problems of poor needle inserting routes and unreasonable dose distribution due to dissection and gross tumor volume reduction inaccuracy caused by human factors are effectively avoided, and the success rate of the cervical cancer interstitial brachytherapy minimally invasive surgery is greatly increased.

Description

technical field [0001] The present application relates to the field of medical devices, in particular to an implant guide device for minimally invasive brachytherapy of cervical cancer. Background technique [0002] Three-dimensional interstitial brachytherapy is a method of inserting a hollow needle into the tumor, and the radiation source reaches the inside of the tumor through the needle channel, killing tumor cells at a short distance, so as to achieve the purpose of treating the tumor. Three-dimensional interstitial brachytherapy technology involves radioactive sources, the core of which is the location and distribution that radioactive sources can reach. After the radiation source enters the tumor body through the needle tract, it releases quantitative and short-distance radiation according to the plan, so that the tumor tissue is destroyed to the greatest extent, while the surrounding normal tissue is less damaged. [0003] The current three-dimensional interstitial ...

AI Technical Summary

Problems solved by technology

The traditional implantation surgery under the guidance of CT images needs to insert the needle under direct vision, and then adjust the depth under the guidance of CT. At present, the three-dimensional interstitial brachytherapy is not completed at one time. According to the tumor size, invasion depth, and surrounding normal Considering various factors such as the amount of tissue received, it is generally difficult to guarantee the accuracy and repeatability of each implantation with traditional CT-guided freehand implantation after multiple treatments.

Among patients with cervical cancer, some of them have recurrence in the cervix or vaginal stump. The vaginal speculum cannot expose the surgical field well in patients with vaginal stenosis or large recurrent tumors, which affects the direction and site of needle insertion.

Partial tumors are eccentric, large, parametrial, and vaginal, and are closely related to normal tissues such as bladder and rectum. No matter how advanced the puncture technique is, it is difficult to achieve an ideal dose distribution.

This results in a "cold zone" inside the tumor (too small tumor dose leads to poor effect), and a "hot zone" around the tumor (too large dose around the tumor leads to increased side effects) adverse consequences

[0004] For the problems existing in related technologies, no effective solutions have been proposed yet

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