Surgery – Diagnostic testing – Sampling nonliquid body material
Patent
1998-06-22
2000-02-22
Hindenburg, Max
Surgery
Diagnostic testing
Sampling nonliquid body material
600568, A61B 1000
Patent
active
060274581
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a device for taking a tissue sample from a living human being or mammal, in other words a biopsy device.
In particular, the invention concerns a device for taking a sample from a tough tissue.
Such devices are already known, but they are often disadvantageous in that they damage the removed and/or surrounding tissue or in that they are not suitable for tough tissues such as the female breast tissue.
Another disadvantage of the known devices is that, due to their shape and dimensions, they take up too much space in order to be used in combination with an ultra-sound scan or radiological research.
Devices for taking a tissue sample are known among others from DE 2.622.850, U.S. Pat. No. 5,394,887, U.S. Pat. No. 5,499,001 and U.S. Pat. No. 4,461,305.
According to DE 2.622.850, use is made of a body which is provided with a recess, whereby a sleeve can be slid over this body with which the recess can be closed off. While the tissue sample is being taken, the sleeve remains shifted towards the back, and the entire device is moved in a rotating, sticking manner, so that a sawing effect is created, as a result of which tissue is separated in the recess 3. The above-mentioned sleeve does not provide for a cutting effect and exclusively serves to cut off the tissue which is present in the recess 3 from the environment, after the device has been removed. It is clear that the surrounding tissue as well as the tissue sample are severely damaged due to the above-mentioned movements.
A device is known from U.S. Pat. No. 5,394,887 with a rotating stiletto or receiving element and a sliding knife provided axially opposed to it which cannot carry out a rotation, however. The tissue sample is taken by providing the receiving element in the tissue, by rotating it and subsequently sliding the knife over the receiving element. The cutting speed obtained with this sliding movement is very limited, however, so that a nice cut is excluded. Moreover, the tissue is damaged due to the rotation of the stiletto.
A similar device is known from U.S. Pat. No. 5,449,001, with similar disadvantages.
A device is known from U.S. Pat. No. 4,461,305 whereby the tissue sample is separated by carrying out a scraping movement, which of course causes the surrounding tissue to be damaged. Moreover, it is only possible to take a superficial tissue sample with this device.
SUMMARY OF THE INVENTION
The present invention aims a device with which it is possible to take undamaged tissue samples with a minimum of injuries to the part of the body to be examined and the attendant pains, and which can be easily used in combination with medical imaging and subsequent laboratory research.
To this aim, the present invention consists of a biopsy device, comprising a longitudinal receiving element which at its circumference is provided with at least one lengthwise directed tissue receiving space, a knife consisting of a hollow needle which is provided at one end with a cutting edge, whereby this knife works in conjunction with the outside of the longitudinal element to cut off tissue collected in the receiving space, characterised in that the knife is rotatable around and axially movable along said receiving element, and is designed for a helicoidal rotating cutting action, whereas the receiving element is in a fixed position, and in that the device is provided with a driving device to drive the knife at least in a rotating manner over the receiving element.
The receiving element can form several receiving spaces and can have a star-shaped section with sides which are excavated for example towards the inside.
The edges of these receiving spaces are preferably sharp.
The longitudinal receiving element may have a point, but this is not necessary if for example auxiliary elements of the device are used which consist of a location needle and a stabilisation needle fitting around it which, after the location needle has been removed, forms a cavity to insert the receiving element.
BRIEF DESCRIPTION OF THE
REFERENCES:
patent: 2710000 (1955-06-01), Cromer et al.
patent: 4306570 (1981-12-01), Matthews
patent: 4461305 (1984-07-01), Cibley
patent: 4919146 (1990-04-01), Rhinehart et al.
patent: 5133360 (1992-07-01), Spears
patent: 5375608 (1994-12-01), Tiefenbrun et al.
patent: 5394887 (1995-03-01), Haaga
patent: 5449001 (1995-09-01), Terwilliger
patent: 5526822 (1996-06-01), Burbank et al.
Hindenburg Max
Szmal Brian
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