RU182872U1 - DEVICE FOR LABELING TUMOR BEDS - Google Patents

Abstract

The utility model relates to the field of medicine, to the specialty of oncology. The purpose of creating a utility model is to reduce the duration of the operation, to ensure accurate positioning of the tumor bed and to reduce the radiation dose to healthy breast tissue. This goal is achieved by the fact that the device for marking the tumor bed is made in the form of a cross (1) with overall dimensions of 10 mm wide and 1 mm thick, in the center of which there is a circle (2) with four equally spaced openings (3) with a radius of 0 , 8 mm, and a hexagonal rod (4) with a width of 0.5 mm and a height of 2 mm, while the crosspiece is made of a titanium alloy biologically compatible with human tissues, 2 il.

Description

The utility model relates to the field of medicine, to the specialty of oncology. The ability to correctly and accurately position the tumor bed in patients diagnosed with breast cancer after performing radical resection, as the first stage of combined or complex treatment, is one of the urgent tasks of modern oncology. Arbitrary displacement of the marking device after performing a radical resection during a change in the position of the mammary gland leads to technically incorrect positioning during targeted irradiation (boost) of the tumor bed, significantly reducing the radiation efficiency.

Known bracket for the fixation of fractures of the bones of the cranial vault (RU 134035 10.11.13), which in practice is often used when marking the tumor bed when performing radical resection of the mammary glands. The disadvantage of this bracket is the lack of fixation at several points, which leads to migration in most cases and, as a result, incorrect positioning of the site of the removed tumor. This staple is one of the varieties of staples used by oncologists during radical resections, but this drawback remains common to them. In addition, the staples do not provide a clear visualization of the tumor bed, since they are structurally a cut shape.

Tantalum staples are also known, which are used for marking and are used in 4-6 pieces for marking the tumor bed, indicating the edges of the tumor: upper, lower, medial, lateral (in some cases, the upper pole and the “bottom” of the wound are additionally marked) (https: / /dis.academic.ru> enc_medicine). This method during migration of one of the staples during patient movement leads to incorrect positioning of the tumor bed, which, when calculating the dose by physicists, increases the radiation load on the tissue of the remaining mammary gland due to the wider spread of tantalum staples. This technique also increases the duration of the operation.

A device for marking that meets the specified purpose is known - marking a tumor bed (US 6621889 B1, 09.16.2003) D1 (abstract, Fig. 1, item 114). The disadvantage of this device for marking is that it fits on the patient’s body, and when performing operations on the mammary gland it is not applicable and does not provide a clear visualization of the tumor bed.

The purpose of creating a utility model is to reduce the duration of the operation, to ensure accurate positioning of the tumor bed and to reduce the radiation dose to healthy breast tissue.

This goal is achieved by the fact that the device for marking the tumor bed is made in the form of a cross with overall dimensions of 10 mm wide and 1 mm thick, in the center of which there is a circle with four equally spaced holes with a radius of 0.8 mm, and a hexagonal rod with a width of 0 , 5 mm and a height of 2 mm, while the crosspiece is made of a titanium alloy biologically compatible with human tissues.

Comparison of the proposed device with others known in the field of medicine, shows its compliance with the criteria of a utility model.

The utility model is illustrated by graphic material.

In silt. 1 shows a device in direct projection.

In silt. 2 shows a device in side view

It consists of a cross (1), a circle (2) with four equally spaced holes (3), a hexagonal rod (4).

A device for marking a tumor bed is used in the following way. When performing a radical resection in a patient diagnosed with breast cancer, a skin incision is performed above the tumor. The next step is to remove a breast tumor with adjacent fiber, departing from the edge of the tumor 5-10 mm. The removed tumor is sent for an urgent histological examination to determine the "purity" of the edges of the wound. The device is installed in the bed of the removed tumor, applying two sutures with a surgical needle and nylon threads through equidistant holes with a radius of 0.8 mm, firmly fixing the device to the remaining breast tissue (this procedure takes 30-60 seconds). The next step is regional lymphatic dissection. After drainage of the tumor bed and axillary region with two flexible drains, the postoperative wound is sutured in layers. Radical resection is one of the stages in terms of combined or complex treatment of patients with a diagnosis of breast cancer. After hospitalization in the radiotherapy department, the patient is sent for marking to determine the tumor bed using a CT apparatus and drawing up a 3D diagram with boost on the tumor bed. When performing CT marking, thanks to the cross (1) and the hexagonal rod (4), the location of the removed tumor is determined. For the next stages, the physicists calculate the optimal dose and the patient undergoes the planned radiation therapy.

Using the proposed device will allow:

1. Reduce the time of the operation.

2. Ensure accurate positioning of the bed of the removed tumor.

3. Reduce the radiation dose to healthy breast tissue by accurately marking the tumor bed.

INFORMATION SOURCES:

1. Clinical protocols for the diagnosis and treatment of malignant neoplasms I Moscow, 2012. - 619 p.

2. Clinical recommendations for the diagnosis and treatment of patients with breast cancer. Association of Oncologists of Russia / Moscow, 2014 .-- 43 p.

Claims (1)

A device for marking a tumor bed, characterized in that it is made in the form of a cross with overall dimensions of 10 mm wide and 1 mm thick, in the center of which there is a circle with four equally spaced holes with a radius of 0.8 mm, and a hexagonal rod with a width of 0, 5 mm and a height of 2 mm, as shown in FIG. 2, wherein the cross is made of a titanium alloy biologically compatible with human tissues.

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