RU1827223C - Device for biopsy - Google Patents

Abstract

Usage: in medicine, in ophthalmology in the diagnosis of intraocular tumors. SUMMARY OF THE INVENTION: in a device made in the form of an evenly hollow needle with an inner conical channel of a needle with a spherical blanked cone, on which a lateral oval hole is made, the point of the major axis of the hole closest to the working end is located on the outer sphere of the blanked working end at an angle of 45-90 ° to the axis of the needle, while the working edge of the hole is made beveled, forming a sharp edge between the wall of the hole and the inner surface of the channel. 8 ill.

Description

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The invention relates to medicine, namely to ophthalmology and can be used in the diagnosis of intraocular tumors.

The purpose of the invention is to reduce postoperative complications by reducing trauma to the tumor tissue at the time they are removed from the tumor.

Figure 1 shows a longitudinal section of a device; figure 2 is an enlarged view of the end of the needle with a side hole; Fig. 3 is a view of a side opening; Fig. 4 is an embodiment of a needle with a pointed end; Fig. 5 is an embodiment of a curved needle; in Fig.6-8 - presents a diagram of the operation of the device.

The device consists of a needle 1 and a head 2 for connection to a syringe (not shown). The needle 1 is hollow with a conical inner channel 3 expanding from the end 4 of the needle 1 to the head 2. Since the needle 1 is of equal construction, the outer surface of the needle 1 is conical. The working end 4 of the needle is made with a spherical rounding 6 of the channel 3. At the working end 4 there is a lateral oval hole 7, the major axis of which coincides with the longitudinal axis 9 of the needle 1. The point 10 of the major axis of the hole closest to the working end 4 is located on the sphere 6 of the muffled working end at an angle of 45-90 ° to the axis of the needle, while the working edge 11 of the hole 7 is made beveled, forming a sharp edge 13 between the wall 14 of the hole and the surface of the channel 3 (Fig.2 and 3). The needle 1 can be made with a sharpening 15 at the working end 4 (figure 4) and bent (figure 5).

The device operates as follows.

The device through the head 2 is connected to the syringe and through an incision or puncture into the sclera 16 is introduced into the cavity 17 of the eye block 18. The control of the injection is carried out under a microscope (not shown) through the cornea 19. The working end 4 of the needle 1 is inserted into the tumor body 20 to a depth. the overlapping oval opening 7. By means of a syringe, the tumor tissues 20 are aspirated into the inner channel 3 of the needle t through the opening 7 (Fig. 7). After that, the needle 1 is removed from the tumor 20, while the edge 11 of the opening 7 separates the tissues from the tumor 20, which fill the spherical rounding 6 of the channel 3. The device is removed from the ophthalmic block 18 and applied by syringe pressure to a glass slide (not shown) for further research.

The implementation of the internal channel 3 expanding from the distal end 1 to the head 2 allows to reduce the hydraulic resistance of the channel, and therefore use the lower vacuum required for tissue aspiration. The implementation of the inner channel 3 blind with a spherical rounding 6 allows in combination with the side hole 7 to form a hook on the distal end 4, which securely captures the tissue of the tumor 20. When performing

of the lateral opening 7 oval, it is possible to more completely fill the entrance of the channel 3 with the tumor tissue, and the implementation of the bevel 12 forming a sharp edge 13 between the wall 14 of the hole and the surface channel 3 allows to reduce the effort when separating the tissues from the tumor 20.

Making the needle curved can improve the usability of the device if the tumor is in

0 inaccessible to a straight needle. The sharpening of the outer surface of the end 4 of the needle 1 reduces the force of insertion of the needle into the tumor. It should also be noted that the conical outer surface best seals the operative wound on the sclera.

The location of the axis 8 point 10 closest to the end 4 of point 8 on sphere 6 at an angle of 45-90 ° relative to axis 9 is due to the extraction of tumor tissue from the internal channel 3. So, at an angle greater than 90 °, point 10 will be on the conical part of the needle 1 and the removal of tumor tissue from the spherical rounding 6 of the channel 3 will be difficult, and

5 at an angle of less than 45 °, the capture of tumor tissue will not occur when they are separated from the tumor body.

In addition, the implementation of the needle conical shape allows, when equivalent to

With the prototype values of hydraulic resistance, make a thinner working end of the needle. Consequently, such an arrangement of the aspiration opening on the lateral surface of the needle at its distal end allows avoiding the scattering of tumor cells already at the level of the puncture channel of the tumor, since the visor of the opening cuts off the cell flow upon aspiration of the neoplasm from the surrounding tissue, and scattering does not occur when the needle is removed tumor cells from the rarefied space surrounding the needle opening, since the direction of needle extraction is perpendicular to aspiration.

Claims (1)

SUMMARY OF THE INVENTION Biopsy device made in the form of a wound cavity with an internal conical channel of a needle with a spherical plugged working end, on which a lateral oval aperture is made, characterized in that, in order to reduce postoperative complications due to a decrease in the trauma of the tumor tissue at the time of their removal from the tumor, the point of the major axis that is closest to the working end is open. The spine is located on the outer sphere of the muffled working end at an angle of 45-90 ° to the axis of the needle, while the working edge of the hole is beveled to form a sharp edge between the wall of the hole and the inner surface of the channel. FIG. 4 7 FIG. 5 % t.6 twenty FIG. 7 // FIG. at 1827223