DE8601068U1 - Orthopedic instrument, in particular for bone biopsy - Google Patents

Description

The invention relates to an orthopedic instrument, and more particularly to such instruments that are used for performing Bone biopsies are appropriate.

In a case where a bone tumor is presumed to exist, it is appropriate to perform a biopsy in which Bone material samples are taken from a number of positions spread across the bone so that both the Nature as such the extent of the tumor can be determined can. There is currently a routine procedure for doing this expect to make a larger incision to access the bone through which the desired specimens The samples can usually be taken in fragmented form through the use of an osteotome be cut out. However, this method is disadvantageous in that it involves a considerable risk Tissue burn and spread of the tumor along the incision. This risk may not be true if the bone condition is such that it is similar to an early tumor removal procedure using one requires a large incision, but such an operation is not a necessary consequence Risk is then significant.

The present invention has for its object to improve this situation in that an instrument for Is provided, which allows the removal of bone material for biopsy exams in a less disruptive manner.

According to the invention, an orthopedic instrument is provided, this is characterized by three elongated links corresponding to different lengths, mutually exclusive Are longitudinally displaceable and rotatably connected to one another as the inner, middle and outer link 30, 20, 10 one

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Telescopic arrangement _t from which the links can be separated one after the other at one end and individually advanced at the other end, the inner link 30 being the longest link with a handle 32i knob shape at one end and solid and blunt at the other End is, and the middle member 20 comprises a sleeve 21 which has a handle 22 in a T- * bar shape at one end, and a relatively short elongated portion 24 of reduced wall thickness * which in teeth 23 around its other end below Formation of a hole saw ends, and wherein the outer link 10 is the shortest link in the form of a sleeve 11, which at one end has a handle 12 in the shape of a pistol, which is larger in the transverse direction than the T-bar-shaped handle 22, and elongated at the other end Has protrusions 13 for penetration into the bone *

For a better understanding of the invention, a preferred embodiment is shown below with reference to the drawing shown. The single figure shows a longitudinal section through the orthopedic instrument according to the invention.

The instrument shown is shown as a mutually separable telescopic arrangement of three elongated links, of which the radially outermost, middle and innermost are labeled 10, 20 and 30, respectively. These Links have correspondingly different lengths, link 10 being the shortest and link 30 being the longest.

The outermost member 10 comprises a sleeve 11 with a circular Section, with a handle 12 in the form of a pistol grip being provided in the direction of one end, which extends from the sleeve generally extending in the manner of a pistol grip, and having a small number of relatively short metal tips

or other axial protrusions 13 at its other end are provided, which penetrate into the bone for reasons of stability.

The middle member 20 comprises a sleeve 21 of circular Section which is slidably and rotatably received within the sleeve of the link 10. The link 20 possesses its one end a T-bar-shaped handle 22 of smaller transverse dimension compared to the pistol-shaped Handle 12 and is provided with teeth 23 at its other end, which serve as a hole saw. In this last one In connection with this, it should be evident that a short longitudinal part 24 of the sleeve 21 at its other end reduced one Has the wall thickness so that the saw teeth can sit down, with the teeth not extending further in the transverse direction than the rest of the case.

The innermost member 30 comprises a solid rod 31 of circular Section with a knob-shaped handle 32 at one end and in which the other end is blunt. Of the Use of this instrument involves attaching the entire assembly to a local small incision called the leads to the bone of interest, with the innermost member 30 serving as a blunt trocar to separate the tissue and to indicate the position against the bone. The outermost link 10 is then grabbed and forced to use his Metal tips 13 penetrate the bone, the innermost limb 30 is removed and the middle limb 20 is grasped and rotated to excise a bicortical core sample, and members 20 and 30 are then removed. Thereafter For example, the limb 10 can be separated and the limb 30 reinserted into the limb 20 to remove the one excised for analysis Eject sample.

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The special choice of different handle shapes for the three limbs of the instrument is particularly beneficial to Relief of the otherwise very difficult procedure for a single surgeon who works with two hands t | used together.

® Finally, it is obvious that the invention is also possible for 's other applications. She is especially-

v | others useful in bone biopsy procedures. E.g. has I found that there is relief under certain I conditions give ^ in which avascular bone burn I occurs by drilling into the affected bone; and

\ this instrument is suitable for this purpose.

Claims (1)

, kAFJFAY, FLpOK * PARTNER PATENT LAWYERS EUROPEAN PATENT ATTORNEYS POST BOX 32 32 17 D-2000 HAMBURG 13 Jan. 16, 1986 National Research Development Corporation 101 Newington Causeway
London SE1 6BU DIP_-ING. VINCENZ v. F-AFFAY DIPU-CHEM. DR THOMAS FLSDK HAMBURG DIPU-CHEM. DR HANS D. BOETERS DIPU-INa ROBERT BAUER MOf CHEN KANZLEl: GEFFCKENSTRASSE β TELEPHONE: (040) 47 80 TELEGRAMS PATFAY. HAMB '' RG TELEX 2 164 631 patyd TELEFAX (040) 480 25 N 11 P 50 Orthopedic instrument, in particular for bone biopsy Claim to protection Orthopedic instrument, especially for bone biopsy, characterized by three elongated links of different lengths, which are mutually longitudinally displaceable and rotatable with one another as inner, middle and outer Link (30, 20, 10) of a telescopic assembly are connected, from which the links are connected one after the other at one end thereof are separable and can be individually advanced at the other end, the inner link (30) being the longest link having a knob-shaped handle (32) at one end and solid and blunt at its other end, and wherein the middle member (20) comprises a sleeve (21) having a handle (22) in a T-bar shape at one end thereof, as well as a relatively short elongated part (24) of reduced wall thickness which has teeth (23) around it other end to form a hole saw ends, and wherein the outer link (10) is the shortest link in the form of a Sleeve (11) represents, at one end of which has a handle (12) in the shape of a pistol grip, which is larger in the transverse direction than the T-bar-shaped handle (22), and at the other end elongated projections (13) for penetration into the bone having.