DE1921627U - BIOPSIA NEEDLE. - Google Patents

Description

PATENT ADVOCATE

BiPi.-ing. AMTHOR

FRANKFURT AM MAIN

Privatdozent Dr. Herbert Blaha «jbmo exercises a. with 15.5 ♦

Offenbach / Main, lohweg 36

MEDIUM 10

and

11088

cand. med. Michael Amthor
Frankfurt / Main, Uesenstrasse 6

Biopsy needle

The subject of the invention is a censure which is particularly suitable for the purposes of lung biopsy.

For biopsy, e.g. pleural biopsy, so-called biopsy needles are known, the needle body of which consists of two concentric and is formed relative to each other with handles displaceable ears, or in which others displaceable relative to each other Elements make it possible to remove body fluid after inserting the piercing tip or the piercing head and also to separate samples from the tissue to be examined for out-of-body examinations.

Among the previously known üTadelarten are those in which When sliding on, two pretensioned leather hooks spreading in opposite directions grasp the tissue and allow a tissue particle to be torn off and removed by pulling it back into the jacket tube, in particular not suitable for lung biopsy work. Tension strains and injuries to the sample can easily occur. and more or less strong tissue changes can influence the investigation picture! besides, it is through aspiration

recoverable amount is usually too small because of the the aspiration cross-section occupied by the mechanical elements. For pleural biopsy, a needle is already known ("Abrams needle"), in which the jacket tube is behind the The piercing head attached to it has an eye-like recess, which means that when a hollow piston tube is inserted for the drainage of liquid against the closed piercing head tissue that is pressed into this recess can be "cut off".

Apart from the fact that in this type of loading the sample opening is too small because the ratio of the outer diameter to the cross section of the thinner piston tube is the size of the This arrangement cannot be used well for lung biopsy either, because the only one-sided position of the recess of the part of the tissue that is in many cases not suitable for the sample separation can capture. When a sample is taken from the lungs, the nature of this tissue plays a special role Role. It behaves in relation to other tissues, such as the pleura, which show an approximately "plastic" state when punctured Lung like a spongy, rubbery body} it gives way when piercing through this peculiarity, forming an indentation around the tip and does not press itself into the small storage opening or not so that with easier Handling a tissue sample could be severed.

The primary intended for lung biopsy according to the invention needle, which also has two concentric

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Tubes are shifted against each other, is characterized from these considerations in that behind the of the The piercing head carried by the basket tube has a recess formed by the core tube which extends over at least half the circumference of the casing and a cutting edge on or above the upper land of this recess is arranged, with which the tip-side edge edge equipped with a cutting edge is used as a counter-cutting edge of the jacket pipe cooperates.

To explain the needle according to the invention, some embodiments are shown in the drawing - but these are only examples should represent - shown, on the basis of which the individual parts are described in more detail.

Fig. 1 shows one of the embodiments in perspective

double enlarged view! Fig. 2 shows in a further enlarged sectional view Embodiment according to FIG. 1 in its essential here Part;

Fig. 3 shows another embodiment in also strong enlarged scale.

In these representations are the individual 'parts of the needle referred to as follows «

In the hollow handle 1 with the finger pieces 2 and 3 and the indicated lock 4 are the concentric "needle tubes telescopically movably coupled to one another, for example in a mostly common design such that the G-riffstück 3 by a pitch circle turn the outer cylinder

of the handle, which is provided with a spiral groove, into the a pin engages on the jacket of an inner cylinder or the outer jacket of the inner tube 6, the jacket tube 5 allowed to move forward and backward rotating. According to FIG. 2, the inner tube 6, the piston tube, has such a recess in the region of its front end, that the end piece attached to the piercing head 7 with the main part only through a web 8 in the form of a narrow cylinder neck piece communicates. This foremost piece on the grooving head is sharpened to a cutting edge at the free end, which is denoted by 9. lit this the cutting edge 10 of the jacket tube 5 acts together. If the jacket pipe 5 pushed back and thus exposed the recess, this offers a large storage opening that without turning or particularly stressful manipulations offers the patient enough space for a corresponding G-web segment to enter, which is severed sharply when the sharpened jacket tube 5 is pushed forward. According to Fig. 3, the piercing tip 7 'is on a Shank 15 attached, which in arm crosses, perforated washers or the like. 16 and 17 is fastened centrally in the piston tube 13. The piston tube moves in the jacket 11 or vice versa, thereby acting in the manner mentioned, the sharpened edge 12 of the jacket tube with the here sharpened, inwardly offset neck 14 of the piercing head 7 'together.

The two cutting edges can also be arranged in alignment instead of like scissors, so that only the edges meet, with of course, the piercing head must be designed in this way in its cross-section that no deposition is the introduction

and make it difficult to withdraw the needle during the medical procedure.

Both the web can be wider or shorter, as well as a transverse wall or the like instead of the shaft according to FIG. 3, wear the top that with this carrier also close behind the recess can be supported by two flaps bent apart or in any other way that encompasses the rehearsal space Impaired as little as possible and also does not impede the aspiration of liquid.

Overall, it allows the use of the inner needle tube for trial insertion and enlargement the receiving opening also allows larger samples to be taken or to avoid stressing the patient Restriction to smaller sample sizes the possibility To keep the needle cross-section smaller than before. Another advantage for lung biopsy is that it is now with Retrieving the lungs is pinched and not when thrusting the needle, whereby it turned out to be a disadvantage, especially here, that due to the special nature of this tissue, the lung was pushed forward, evaded and the more difficult it was to grasp a sample site.

Claims (4)

RA. 2.73066 * 5/26/65 claims 1. Biopsy needle with a relatively opposite a piston tube sliding jacket tube and with a recess serving for sampling in the area behind the piercing head, characterized in that behind the Bin piercing head carried by the piston tube has at least one half the circumference of the jacket overlapping recess is provided on the piston tube and on or above the upper edge of this recess a cutting edge is arranged, with which rather than Shearbar that is equipped with a cutting edge and the tip-side edge of the jacket tube interacts. 2. biopsy needle according to claim 1, characterized in that that the linear head of an approximately web-shaped part of the piston tube remaining through the recess is worn. 5. biopsy needle according to claim 1, d a d u τ ο h g e k e η η-records, that the piercing head is held by a, preferably central, support piece and inside the piston tube is attached by radial arms, such as a spider. 4. biopsy needle according to any one of claims 1-3, dad u r c h marked that the jacket tube and the piston * tube in their end positions to be determined by relative displacement in a manner known per se by arrangements such as bayonet locking, Spiral groove guide with detent or the like. are designed to be detectable.