DE2721012A1 - BIOPSIEGERAET FOR TAKING SAMPLE EXCISIONS - Google Patents

Description

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• M-App. HenmaniiTrentapeM Dlpl.-PhV8. Eduard Betzier Telephone: 36 3011

• ^r 61014 DlpL-lng. W. Herrmann-Trentepohl »■«

Telegram address: Tdegram address: Bahrpatente Herno PATENTANWÄLTE Babetzpal Munich

Τ · Ι · χ 0611t663 Telex 521636 ·

Bank accounts:

Bayerische Verelncbank Mönchen UH Dresdner Bank AQ Ham · 7-S »4M Postscheckkonto Dortmund 666 6M (T

M 05 960 B-ag

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Please indicate in the answer Please send a letter to:

Munich

Dr. Shelby M. Baylis - Dr. Jorge S. Szauer

-a / for taking sample excisions- ^ H «ä - <^ iopsy device>« YÄ- ierre

The invention relates to a biopsy device for removal of trial excisions.

The biopsy device has a hollow outer cannula, in the interior of which a fixed inner puncturing Troicart, ie a retractable body cavity puncture needle, is initially arranged. A biopsy sample is obtained from a patient by first inserting the outer cannula Troicart device into a desired location in the patient. The solid inner initial puncturing troicart is then withdrawn from the outer cannula while the outer cannula remains in place in the whisked location for sampling. A hollow inner cannula is then inserted into the outer cannula _/ and when the inner cannula is withdrawn from the outer cannula, the desired sample is obtained in the hollow interior of the inner cannula.

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In another embodiment, a rotatable biopsy device is provided which has an elongated inner needle element for having initial penetration of the body tissue, while an outer hollow cylindrical cutting tube subsequently slidably received by the needle. The needle first penetrates through a rotational movement exerted by it into the desired location to take the sample. Then the tube is slidably arranged over the needle and downwards until it also penetrates the body tissue, and the tube and needle are then withdrawn at the same time, collecting the sample inside the tube.

The invention, which is used for obtaining biopsy samples, e.g. those from the breast, thyroid, solid tumors, bone marrow, liver, kidney, side, ribs or diaphragm, synovia or synovial fluid are used can be explained in more detail below with the aid of exemplary embodiments and the associated drawing. The drawing shows in

1 is an illustration for explaining a hollow outer cannula according to the prior art;

Fig. 2 is an illustration for explaining a fixed inner puncturing troicart according to the state of the technique;

3 shows a hollow inner cannula according to the invention; Fig. 4 is an enlarged view in section of the

End region of a first embodiment of the hollow inner cannula according to the invention Fig. 3;

5 shows an enlarged illustration in section of the end area of a second embodiment of the

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inventive arrangement according to FIG. 3;

Fig. 6 is a sectional view taken along line 6-6 of Fig. 5;

FIG. 7 is a view in section along the line 7-7 of FIG. 6;

8 shows an illustration to explain the biopsy device according to the invention in the assembled state according to a third embodiment;

9 is an illustration for explaining the inner needle element inserted into the body, in which the outer tube is partially placed over it;

10 is an illustration for explaining the device in FIG

an operative position in which the outer tube is fully inserted into the body;

Fig. 11 is an illustration of the device to explain how

the inner needle member and the outer tube are taken out of the body at the same time; and in

12 shows an enlarged representation in section for the purpose of illustration of the sample, which is inside the tube and between adjacent threaded parts of the needle element is collected.

Fig. 1 shows a hollow outer cannula of conventional design. The cannula 1 has a beveled distal end point 2 for penetration into the body tissue and a type of hub 3 which enables the user to grasp it with his fingers. The distal end point 2 and the proximal end 4 of the cannula 1 are open.

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Fig. 2 shows a solid internal initial puncturing troicart of conventional design. The Troicart 5 generally corresponds to in its length and shape of the cannula 1 so that it fits flush. The beveled distal end 6 of the troicart 5 is designed to match the distal end 2. When inserting the Troicarts 5 in the cannula 1 align the corresponding beveled distal ends of the cannula 1 and the troicart 5 with one another, while the funnel or hub part 7 extends over the proximal end 4 extends out to allow easy removal of the Troicart 5 from the cannula 1.

3 shows a hollow inner cannula 8 with an end region 9. The shape of the cannula 8 generally corresponds to the cannula and fits flush into the cannula 1. When the cannula 8 is inserted The region 9 extends into the cannula 1 approximately 3 cm beyond the distal end 2 and the funnel or hub part 10 extends beyond the proximal end 4 in order to enable easy handling of the cannula 8 within the cannula 1.

The Troicart 5 is first inserted into the cannula 1, and then the Troicart cannula device is inserted into the patient introduced to the desired location for taking the sample. The end 2 of the outer cannula 1 and that with it inside aligned ends 6 penetrate the body tissue. The Troicart 5 guides the cannula 1 during insertion and prevents Tissue penetrates into the cannula 1. After complete insertion, the Troicart 5 is completely withdrawn from the cannula 1, while the cannula 1 remains stationary in the patient.

Subsequently, the cannula 8 is completely inserted into the cannula 1 inserted so that the area 9 extends by 3 cm beyond the end 2 also. The area 9 is preferably with one therein arranged frustoconical conical cutting area 11, the base of which is in the vicinity of the distal edge 13 of the Cannula 8 is located (see. Fig. 4). The area 11 carries out a cutting process with its sharp frustoconical edge 12.

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The angular distance between the area 11 and 11 is preferred the interior of the area 9 is at least partially fixed, to prevent a sample from being trapped therein. When the cannula 8 is pulled out of the patient, the Edge 12 from a cutting process and causes tissue to accumulate in the interior of the area 9 during the removal process. The cannulas 1 and 8 are preferably used simultaneously removed from the patient. The sample material collected in the interior of the area 9 has a length of approximately 2.5 to 3 cm, due to the length of approximately 3 cm by which the area 9 protrudes beyond the end 2.

Fig. 5 shows a second embodiment of the area 9. In addition to the area 11, the inner surface of the area 9 is with sharp cutting threads 14 are provided, which are designed in their shape so that they the area 11 when cutting and Support holding the tissue inside the area 9, when pulled out of the patient. With the attachment of the threads 14 and also with any other desired use of the device according to the invention, it is advantageous to close the cannula 8 before it is removed from the patient rotate while the cannula 1 remains stationary. Such a turning movement is not traumatic or caused by violence, since the cannula 1 remains stationary and serves to support the cutting process of the cutting device of the area 9.

As can be seen from FIGS. 4, 5 and 6, the area 9 is provided with a hole 15 extending through it. After the cannulas 1 and 8 have been withdrawn from the patient at the same time, the cannula 8 is withdrawn from the cannula 1. The ones in the area The sample contained and removed can then be easily removed from the area 9 through the hole 15. this happens for example, by inserting a wire 16 or other suitable insert into the hole 15 to assist in removing the sample from the hole. As from Fig. 7 recognizable, takes the hole 15 on both sides of the circumference of the

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Area 9 has an angular circumference of 90 ".

8 shows a rotatable biopsy device with an elongated needle 17 which is arranged in the interior of a hollow cylindrical cutting tube 21. The needle 17 and the tube 21 have uniform diameter. The needle 17 is provided at its proximal end with a handle 31, the diameter of which is somewhat is larger than that of the needle 17, but which is sufficiently small that the tube 21 can slide over it. The needle 17 is with a helical thread 41 with a sharp cutting edge provided over a suitable length to facilitate and support the cutting and holding of the specimen. Near the proximal end of the tube 21 is a handle part 51 is arranged, which has a rod part 5a extending perpendicularly to the longitudinal axis of the tube 21 and one at the end of the Has rod 5a attached button 5b.

The distal end 61 of the needle 17 is provided with a sharp needle point which enables the initial penetration into the patient to be relatively painless with minimal injury or trauma. The distal end 71 of the Tube 21 is provided with a sharp cutting edge.

Although Fig. 8 shows the needle 17 within the tube 21, Fig. 9 shows that the needle 17 and the tube 21 are separated from each other. In order to initiate the process of obtaining a sample, the skin layer 81 of the patient is opened with the needle 17 dotted. In order to facilitate the penetration of the needle 17 into the tissue 91 of the body, the needle 17 is opened by turning the handle 31 in the direction of the arrow shown in FIG turned. During this rotary movement, the thread 41 makes it possible for the needle 17 to act on the patient with minimal use of pain and force. As soon as the needle 17 with its rotational movement has penetrated to the desired location in the tissue 91, the tube 21 is slidably disposed over the needle 17 and pushed down. The inside diameter of the pipe

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is only slightly larger than the combined diameter of needle 17 and thread 41 to ensure that an im there is a substantial tight fit between the needle 17 and the tube 21. The distal end 71 is provided with a circular beveled end edge that is extremely sharp, to cause easy penetration into skin 81 and tissue 91.

10 shows the tube fully inserted into the fabric 91 21 in its operating position. The tube 21 is pushed down in the direction of the arrow (see. Fig. 10), and it is not Rotation of the tube 21 required for penetration. The handle part 51 facilitates the actuation and handling of the tube 21 towards the needle 17 and the patient. When the tube 21 is pushed down over the needle 17, the needle 17 remains stationary and serves as a guide for the tube 21 during insertion. When the needle 17 and the tube 21 are in the position shown in FIG. 10, the proximal end of the Needle 17 including the handle 31 outwards over the proximal end of the tube 21, as can be seen from FIG leaves. The distal end 71 protrudes into the tissue 91 outside the distal end point 61.

The tube 21 and the needle 17 are simultaneously withdrawn from the position according to FIG. 11 into the position shown in FIG. 11, as indicated by the arrow in FIG. 11. At the Withdrawal of the tube 21 and needle 17 from the patient no rotational movement is required and the tissue sample is in Inside the tube 21 is collected in the space between the tube 21 and the needle 17. The greater part of sample 18 is between Contain adjacent thread parts of the thread 41, and in this way a fairly large and fully adequate amount of sample is collected and withdrawn with minimal use of pain or force.

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Fig. 12 shows the sample 18 collected in the narrow space between the tube 21 and the needle 17. The thread 41 assists in collecting and holding the sample to be removed 18. After the device with the sample 18 contained therein has been completely removed from the patient, the Apparatus disassembled and the sample 18 taken out in a simple and effective manner.

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Claims (2)

Claims Biopsy device for taking sample excisions, marked through an elongated hollow outer cannula (1) with open distal and proximal ends (2, 4), the distal end (2) forms a cutting edge, by a fixed inner device (5) which corresponds in length and shape to the outer cannula (1) and to the initial Penetration into the body tissue can be received tightly in the outer cannula (1), through a hollow inner cannula (8) which after removal of the solid inner device (5) into the hollow outer cannula (1) can be used, by an elongated distal cutting end region (11, 12, 13) provided on the inner cannula (8), which extends over the distal Cutting edge (2) of the outer cannula (1) protrudes when the inner cannula is in its working position within the outer cannula (1) is introduced, and 709848/0896 ORIGINAL INSPECTED η \ naohqereioht | by one inside the distal cutting end area (11, 12, 13) of the inner cannula (8) arranged cutting device (14) for cutting body tissue when the inner cannula (8) is taken out of the body, which collects the tissue sample inside the inner cannula (8). 2. Biopsy device for taking sample excisions, marked through an elongated needle (17) with distal and proximal ends, the distal end having a cutting edge (61) for initial penetration of body tissue (81, 91) by cutting devices (41), which are at least partially extending over the length of the needle (17), through a hollow cylindrical cutting tube (21) with uniform Diameter and distal and proximal ends, the distal end having a cutting edge (71), and further characterized in that the cutting tube (21) can be slidably received close to the needle (17) when the needle (17) has penetrated the body tissue (81, 91), that the cutting edge (71) of the cutting tube (21) protrudes over the cutting edge (61) of the needle (17) into the body tissue (81, 91) when the cutting tube (21) is above the Needle (17) is arranged, and that the needle (17) and the Cutting tube (21) can be removed from the body at the same time, the tissue sample (18) inside the cutting tube (21) is collected. 709848/08 9 6