SU1641297A1 - Appliance for punch biopsy of the brain - Google Patents

Abstract

The invention relates to medical technology. The purpose of the invention is to simplify the cleaning of the device, controlling the length of the cutting part and the thickness of the biological tissue sections. The device contains a perforated plate 1, on which the disk partitions with cutting edges are installed with the possibility of fixing, installed with a gap and perpendicular axes of the device, a tube (T) 12c with a cannula 16 and a tubular knife mounted on T 12 (H) 18. For carrying out simultaneous layer-by-layer biopsy in a single puncture, the device is reported to have a rotational movement, with the partitions making incisions of the adjacent tissues, the latter are fixed by evacuating the channel T 12 and then H 18 are displaced all the way to onechnik 3. 11 yl.

Description

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This invention relates to medicine and medical instruments used for diagnostic purposes.

The aim of the invention is to improve the quality by adjusting the thickness of the cut biopsy and to prevent the dividing of the disk partitions.

Figures 1 and 2 depict a device for an functional biopsy of the brain, a general view; on fig.Z - section A - A in figure 1; figure 4 - section B - B in figure 1; figure 5 - section b - b in figure 1; figure 6 - the working part of the device, a longitudinal section; on ig.7 - section G - D in Fig.6; on Fig - the flow of D - D on figb; Fig. 9 shows the working part of the device, an embodiment; on ig.u - section Ј - E in figure 9; figure 11 - section W - W in Fig, 9.

The device for puncture biopsy of the brain contains a carbide plate 1 with perforations 2 along the long axis and a conical tip 3 forming the tip of the device. In the distal portion of the plate 1, removable disk partitions 4 with cutting edges 5 are installed, having short tubular sections 6 at the base, made in one piece with partitions 4. The pipe sections 6 have diametrically opposed longitudinal notches 7. According to another embodiment of the device between removable disk partitions 4, there are removable washers 8 with radial holes 9. Partitions 4 and washers 8 have diametrically opposed notches 10 and 11 under the plate on the inner surface 1. The disk partitions 4 are arranged perpendicular to the axis of the device at the same distance from each other with the exception of the possibility of their rotation on the plate 1. In the variant of the device shown in Figures 9-11, instead of washers 8 with holes 9, washers with radial corrugations or radial grooves (not shown). The plate 1 is also fitted with a tube 12 with a channel 13 of circular cross section and a flattened portion in the channel at the proximal end 14 under the plate 1. The end 14 of the tube 12 has a locking screw 15 for fixing the plate 1 in a flattened portion into the channel, the cannula 16, which communicates with the longitudinal channels a and b between plate 1 and tube 12, as well as tubular sections 6, washers 8 and disk partitions 4. Channels a and b communicate with each other through perforations 2 of plate 1, as well as through cutouts 7 of sections 6 (fig. 7) and holes 9 washers 8 (fig.Y.) with annular coal Blenheim E 17 between the circular baffles 4. At the tube 12 longitudinally movably mounted tubular blade 18c of the cutting edge 19 at the tip end and the holder 20 at the opposite end. The holder 20 is provided with a locking screw 21 for fixing the position of the knife 18 on the tube 12. When the cutting edge 19 of the knife 18c mates with the tip 3, it is necessary to be sealed (Figs. 1 and 2). The proximal end 14 of the device has in one plane the plate holders 22 and 23. At the proximal end 14, the device has an elastic plug 24, sealing

5, the gap between the plate 1 and the flattened portion in the channel of the tube 12 (FIGS. 1 and 5). In the case of using a small number of disk partitions 4 in the working area of the device, the plates 1 protrude from

0 channel 13 of the tube 12, with ETM for sealing the gap between the plate t and the area in the channel using a plug 25 with a hole under the plate 1 (Fig.2). On the outer surface of the knife 18, the tube 12 and the plate 1

5, respectively, check marks 25-27 are provided.

The device is used as follows.

Accordingly, the assumed extent of the pathological focus of the brain in the working area of the plate 1 establishes the required number of removable disk partitions 4 with tubular sections 6 (fig. B - 8) or washers 8 and disk partitions 4 (fig. 9-11), the length of the working section is determined by the reference marks 27 on the protruding portion of the plate 1 (Fig. 2). The device, which has the condition shown in Figs. 1 0 5, is fixed in a stereotactic apparatus (not shown) to the holding plates 22 and 23 and targeted puncture of the pathological focus of the brain is carried out. After

5, inserting the working part of the device to the required distance, determined by the control marks 25, the knife 18, holding the holder 20, is displaced in the direction of the non-working proximal end 14 to the required distance, determined by the control marks 26, and fixed on the tube 12 by means of a locking screw 21 (FIG. 6). The device reported axial rotation, while the cutting edges of the 5 disk

5 partitions 4 make cuts of adjacent tissues. The cannula 16 is connected to a vacuum source, and when the channel 13 is evacuated, the incised tissue sections adjacent to the device are fixed in the recesses 17. By rotating the locking screw 21, the knife is removed from the fixed position

18 and, holding it by the holder 20, with rotational movements, they displace up to the stop in the direction of the tip 3 (Figures 1 and 2), thus making a cut of biological tissues located in the recesses 17. The locking screw 21 fixes the position of the knife 18 on the tube 12 The cannula 16 is disconnected from the vacuum source and the device is removed from the punctured organ, and tissue samples are sent for laboratory testing. When disassembling the device, the tube 12 with the knife 18 is removed sequentially from the plate 1, then the disk partitions 4 with tubular sections 6 or the disk partitions 4 and washers 8. The device is sterilized in a disassembled state.

The device provides layer-by-layer sampling of biological tissue in a single puncture. Due to the possibility of disassembling the working part, mechanical cleaning and preparation for sterilization is simplified. Working cutting part of the device

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made in the form of removable elements, which allows the assembly of the device to regulate both the length of the working part and the distance between the disk partitions and, consequently, the thickness of sections of biological tissues.

Claims (1)

Invention Formula A brain biopsy device containing a hollow tubular knife with a cannula and mounted there to move mandrels with disk partitions having cutting edges, characterized in that, in order to improve quality by adjusting the thickness of the biopsy section and preventing the disk partitions from turning, mandrels made as perforated plate, and partitions installed on it with the possibility of removal. in-in to FIG. five