Surgery – Instruments – Means for concretion removal
Patent
1997-10-17
1999-09-14
Buiz, Michael
Surgery
Instruments
Means for concretion removal
A61B 1722
Patent
active
059515708
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an intracorporal treatment system for crushing concretions, such as stones in the urinary tract, calcium deposits in the blood vessels or bone cement according to the generic part of claims 1 respectively 2.
STATE OF THE ART
An intracorporal treatment system of this type is known from U.S. Pat. No. 5,160,336 respectively EP 0317 507 B1 with for the most part the same content.
Largely the same treatment systems are known from DE 38 26 414 A1, DE 43 13 768 A1, OE printed patent 309 663 or OE printed patent 321 448.
The intracorporal treatment systems known from U.S. Pat. No. 5,160,336 or EP 0 317 507 have a thrust unit which accelerates a projectile in an acceleration path in such a manner that it impinges on a target. The acceleration path is in this case a tube in which the projectile can be moved to and fro. Through an air inlet provided at the opposite end of the tube from the target, the projectile can be accelerated by compressed air or the like in such a manner that it impinges on the target with great kinetic energy.
The target, which is in the prior art system a "thrust transmitting window" at the distal end of the acceleration path, transmits the kinetic energy of the projectile to the thrust transmitter which by this means is abruptly moved, i.e. in a thrust-shaped or elongated manner. The thrust transmitter can, by way of illustration, be a high-performance metal wire. By excursion of the thrust transmitter, the to-be-crushed concretion, by way of illustration a urinary stone or the like, is destroyed.
Provided in the treatment system known from DE 38 26 414 A1 is an ultrasonic vibrator which generates the energy by means of which the thrust transmitter is impinged.
DE 43 13 768 A1 describes a treatment system in which a soft iron mass body is accelerated by a magnetic field generated by a coil. The mass body transmits its kinetic energy upon impact with the thrust transmitter thereupon.
Finally treatment systems are known from the aforementioned OE printed patents in which light energy respectively the energy of a spark gap transmitted via a membrane to the thrust transmitter serves to excite the thrust transmitter.
All the prior art intracorporal treatment systems which work with a projectile respectively a mass body have in common that the linear acceleration path for the projectile and the thrust transmitter is aligned strictly axially.
The treatment systems known from OE printed patents employ an axially aligned setup.
Due to the axial alignment of the setup, the prior art treatment systems and, in particular, the prior art generic intracorporal treatment system, as was understood as an element of the present invention, have a number of drawbacks: transmitter can only be adjusted to a certain extent via the impinging pressure. advantage that the projectile can hit the target with relatively high frequency. In a number of instances, by way of illustration, when the concretion to be destroyed is not held in a cage, this high "shooting frequency" is not really needed, because the impact of the thrust transmitter impinging upon the concretion moves the concretion so that the treatment system has to be realigned to the concretion.
In these case, the prior art intracorporal treatment system is unnecessarily complicated and expensive. integration of a suction channel respectively rinsing channel.
DESCRIPTION OF THE INVENTION
The object of the present invention is to provide an intracorporal treatment system for crushing concretions, such as stones in the urinary tract, calcium deposits in the blood vessels or bone cement, in which at least one of the aforementioned drawbacks of the prior art generic intracorporal treatment systems is eliminated, thus by way of illustration the elongation of the thrust transmitter can be set.
The measures claimed in the independent claims can, of course, be combined.
For setting of the elongation, in an invented embodiment, the longitudinal axes of the acceleration path and the thrust transmitter radially offse
REFERENCES:
patent: 3792701 (1974-02-01), Kloz et al.
patent: 3913585 (1975-10-01), Wolvek
patent: 5160336 (1992-11-01), Favre
Irion Klaus
Leibersperger Wolfgang
Bui Vy Q.
Buiz Michael
Karl Storz GmbH & Co.
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