RU194844U1 - DEVICE FOR FIXING INTRASTATES IN CARRYING OUT BRACHITERAPY OF LOCAL DISTRIBUTED TUMORS OF THE SMALL PELVIS - Google Patents

Abstract

The utility model relates to medicine, namely to oncology, radiation therapy and surgery, and can be used in the treatment of locally distributed, including recurrent, pelvic tumors with lateral invasion into the wall of the small pelvis. The device for fixation of intrastats during brachytherapy of locally advanced tumors of the small pelvis consists of a stepped bar made of polymer material with mounting holes for attachment to bone tissue and side holes for fixing intrastats. The advantage of this device is the simplicity and versatility of the design: it can be used with a different number of types and sizes of intrastats; the flexible (adaptive) form allows it to be used for high-power brachytherapy of malignant neoplasms in patients with various topographic and anatomical structures of the small pelvis. The proposed device is industrially applicable, easy to manufacture and does not require large expenses. 4 ill.

Description

The utility model relates to oncology, namely to radiation therapy and surgery, in particular to devices that improve the quality of contact radiation therapy with a high-power source Ir-192.

The level of technology.

Introducers are known (https://endolaba.com/introdiusery), which are a plastic tube called the "sleeve" with a hemostatic valve that prevents backflow of blood and an additional side channel called the "infusion line".

However, when installing the introducers in the pelvic cavity, difficulties in their location and fixation inevitably arise, since in most cases there are no structures to which reliable fixation is possible. Violation of the correct location of the introducers is extremely dangerous, since it can lead to insufficient exposure of the tumor (treatment inefficiency) and to irradiation of intact tissues and organs (development of radiation complications).

Thus, the purpose of this device is the reliable fixation of flexible intrastats designed to bring a radioactive source to the tumor during contact radiation therapy of malignant neoplasms of the pelvic organs, as well as creating a homogeneous radiation field in the desired area.

The technical result of the claimed utility model is the creation of a device for fixing intrastats during brachytherapy of locally advanced pelvic tumors.

The specified technical result is solved by the fact that the device consists of a stepped strip of polymer material with mounting holes for attachment to bone tissue, and side holes for attaching intrastats.

The utility model is illustrated by a detailed description and illustrations, which depict:

FIG. 1 - diagram of a device for fixing intrastats: 1 - steps; 2 - holes for intrastat; 3 - holes for attachment to bone tissue with screws or sutures.

FIG. 2 - general view of the device.

Figure 3 - installation of a device with intrastats during brachytherapy of locally advanced pelvic tumors.

FIG. 4 - Installing the expander.

A device for fixing intrastats during brachytherapy of locally advanced tumors of the small pelvis consists of a strip of polymer material (Fig. 1) with steps 1, side holes 2 for fastening the intrastats and mounting holes 3 for attaching to bone tissue with sutures or screws.

A device for fixing intrastats during brachytherapy of locally advanced pelvic tumors works as follows.

Intrastats are introduced into the lateral openings 2 of the device (Fig. 1), after which they are fixed to the underlying bone structures with screws or sutures through the technological openings 3.

A clinical example of brachytherapy for locally advanced pelvic tumors.

Patient P., born in 1966, main diagnosis: Colorectal cancer yprT4bN0M0 II Combined treatment 2017 (chemoradiotherapy in SOD 46 Gy + operation peritoneal perineal extirpation of the rectum). 5 cycles of chemotherapy according to the XELOX regimen. Presacral relapse.

Examination: According to MRI, a solid formation in the pelvis with invasion of the prostate gland (tumor recurrence) was detected.

The patient underwent surgery: evisceration of the pelvis, heterotopic plastic according to Bricker; Intrastats in the amount of 10 pieces were installed in the holes 2 (Fig. 1), then the device (Fig. 2), immediately during the operation, was given a cross-sectional shape close to the anatomical shape of the bone bed of the patient's sacrum (Fig. 3). After that, the device was fixed to the bone tissue with threads through the through holes 3. To protect the risk organs from radiation exposure in the pelvic cavity, an expander was installed directly above the introduced introducers (Fig. 4).

From 06/03/19. until 06/07/19. 5 sessions of high-power brachytherapy at 5 Gy per fraction were performed daily for 5 days. SOD was 25 Gy.

On the day of the end of brachytherapy in the operating room, intravenous anesthesia and the device itself were removed under intravenous anesthesia. The patient underwent all treatment without complications.

The advantage of this device is the simplicity and versatility of the design: it can be used with a different number of types and sizes of intrastats; the flexible (adaptive) form allows its use for high-power brachytherapy of malignant neoplasms in patients with various topographic and anatomical structures of the small pelvis.

The proposed device is industrially applicable, easy to manufacture and does not require large expenses.

Claims (1)

A device for fixing intrastats during brachytherapy of locally advanced tumors of the small pelvis, characterized in that it consists of a stepped bar of polymeric material with mounting holes for attachment to bone tissue and side holes for fixing intrastats.

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