Device for radionuclide surgery

FIELD: medical facilities.

SUBSTANCE: device can be used as a tool for malignant tumors surgery. Device for radionuclide surgery has gamma radiation detector, collimator and handle. Wire of detector is connected with measuring unit. Gamma radiation detector is fixed in metal tip with sharpened side edge, which passes in plane being perpendicular to optical axis of gamma radiation detector. Detector is made in form of semiconductor crystal; two collimators adjoin opposite surfaces of crystal. Collimators have cells which pass in parallel to optical axis of gamma detector. Measuring unit has electronic circuit with sonic signal source.

EFFECT: ability of reaching area of lesion for removing it.

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The present invention relates to medical technology, and more specifically to tools that are specifically designed for use in surgery of malignant tumors.

A device for surgery, comprising a metal tip with a sharp side edge secured to the handle [1]. This device is intended for General surgery and may not be used for precise access to the lesion containing radionuclides, because it does not have detectors for intraoperative radiometry.

A device for radionuclide surgery Neo 2000 production company "Ethicon Ltd. (UK) [2]. It is specially designed for use in surgery of malignant tumors.

The closest in design to the declared object is a device for radionuclide surgery, containing the gamma radiation detector with photodiode optically coupled with the scintillator and collimator mounted on the handle, inside which passes an electric wire connecting the gamma radiation detector with built-in, connected by a flexible wire to the measuring unit [3].

This analogue of [3] was chosen as a prototype.

The main drawback of the device for radionuclide surgery, accepted us as a prototype, as analogue 2], is that his design is the element that allows the surgeon to carry out targeted access to the lesion, containing a radionuclide, with a view to its excision.

The aim of the present invention is to provide a device for radionuclide surgery, providing the possibility of sighting access to the lesion, containing a radionuclide, for its removal.

This objective is achieved in that the device for radionuclide surgery, containing the gamma radiation detector with collimator fixed in the handle within which passes an electric wire connecting the gamma radiation detector with built-in, connected by a flexible wire to the measuring unit, the gamma radiation detector is fixed in a metal tip with a sharp lateral edge, passing in the plane perpendicular to the optical axis of the gamma detector, and made in the form of a semiconductor crystal with adjoining opposite sides of its working surfaces of the two collimators, with collimators contain cells parallel to the optical axis gamma-ray detector and the measuring unit is equipped with an electric circuit with a source sound signal.

The invention is further illustrated by the drawings and description thereto.

Figure 1 gives a General view of the proposed device and nafig shows the gamma-sensitive scalpel (manual part of the proposed device): 2, a - side view; figure 2, b - cross section a-a of figure 2, a; 2, in - kind by the arrow In figure 2, A.

The proposed device for radionuclide surgery consists of two parts, hand tools - gamma-sensitive scalpel 1 and the measuring unit 2, equipped with a digital display 3 (Fig 1). Gamma-sensitive scalpel 1 is connected with the measuring unit 2 a flexible electric wire 4.

Gamma-sensitive scalpel 1 has a tip 5, made of surgical steel, with pointed lateral edge 6 (figure 2). The tip 5 is rigidly connected to the handle 7. The lateral surface of the arm 7 are closed applicators 8, having a rough surface. They provide a reliable contact of the tool with the hand of the surgeon. In the upper part of the tip 5 has a through hole 9 a round shape, inside of which is assigned a gamma radiation detector 10. It consists of a semiconductor crystal cadmium-telluride (CdTl) 11 and two collimators 12 and 13. The collimators 12, 13 is made of a material with high atomic number such as tungsten. They are adjacent to the working surface of the crystal 11. Each collimator contains cells 14, which is parallel to the optical axis ii of the detector 10. Pointed edge 6 of the lug 5 is in the plane perpendicular to the optical axis ii of the detector 10. This embodiment of the collimators 12, 13 Conn is no crystal 11 of the detector 10 from contact with the oblique rays, reducing the sensitivity of the device. Cell 14 collimators filled with gamma-transparent and biologically inert material, for example PTFE. It protects the cells 14 of collimators from the ingress of particles of blood during surgery. The outer surface of each of the collimators 12, 13 has an oval and a streamlined shape. This solution reduces the resistance of the biological tissue while performing the operation. Inside tip 5 and the arm 7 is channel 15 for the wire 16 connecting the crystal 11 of the detector 10 with the electrical connector 17, mounted in the base of the handle 7.

In the measuring unit 2 is processed electrical signals coming from the detector 10 gamma-sensitive scalpel 1, and display the resulting information on the digital display 3 (Fig 1). In addition, in the measuring unit 2 includes an electronic circuit with a source audio signal, the level of which depends on the intensity of gamma radiation.

Device for radionuclide surgery is used as follows.

Before the operation on the perimeter of the tumor is injected with a small dose of radioactive colloid, such as technetium - 99 (half-time - 6 hours). Approximately one hour after injection of colloid using gamma radiation detector, such as Neo 2000, the surgeon holds the transdermal scanning Killarney area to determine the source of radioactivity. On the body of the patient is fixed in place with the highest signal, coming, for example, from the sentinel lymph node. Using a gamma-sensitive scalpel 1, comprises a device for radionuclide surgery, the doctor makes the dissection of tissues and provides targeted access to the lesion. The target point, the surgeon determines the maximum level of the sound signal and the display 3 of the measuring unit 2. Next, the surgeon makes the excision of the affected area in the body of the patient. Gamma-sensitive scalpel allows the surgeon to perform the surgery with less trauma for more than a short time.

Sources of information

1. Illustrated catalogue "SURGICAL INSTRUMENTS" company "SKLAR - WITTE GMBH, 1973. - C.365.

2. The detector of gamma radiation Neo 2000. - The prospectus of the company "Ethicon Ltd. (UK), 2003

3. Fougeres P., A. Kazandjian, Prat V., Simon H., Ricard M., Bede J. Sentinel node in cancer diagnosis with surgical probes// Nuclear Instruments and Methods in Physics Research, 2001. - A 458. - P 34-40.

1. Device for radionuclide surgery, containing the gamma radiation detector, connected by wire through the connector to the measuring unit, the collimator and the handle, wherein the gamma radiation detector is fixed in a metal tip with a sharp lateral edge, passing in the plane perpendicular to the optical axis of the gamma detector, and are made in the form on provodnikov crystal adjacent to the opposite sides of its working surfaces of the two collimators, this collimators contain cells parallel to the optical axis gamma-ray detector and the measuring unit is equipped with an electronic circuit with a source sound signal.

2. The device according to claim 1, wherein the semiconductor crystal is cadmium-tellurid (CdTl).

3. The device according to claim 1, characterized in that the cells of the collimators filled gameproperty and biologically inert material.

4. Device according to claims 1 and 3, characterized in that the outer surface of each of the collimators has an oval and a streamlined shape.



 

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