Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1987-05-18
1989-02-14
Scott, Samuel
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
128305, 1283031, 433 86, 433119, A61M 100, A61B 1720
Patent
active
048043648
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an apparatus for the curettage or exeresis of biological tissues by an instrument vibrating at ultrasound frequencies, associated with one or more irrigating fluids placed in cavitation and absorbed by a coaxial suction system.
Apparatus using ultrasounds for the treatment of surfaces have been proposed for a long time. This is the case in industry, as in the medical field, particularly in dental surgery. The extreme rapidity of the ultrasound vibrations transmitted to an instrument makes it possible to detach and reduce into fine particles deposits such as tartar.
Such an apparatus is all the more efficient as a projection of fluid or of abrasive powder can be added thereto, which erodes the part to be detached which may then be recovered by a suction system.
Such a combination of means, namely projection of particles or of fluid(s), ultrasounds applied to a tool and suction, is moreover described in U.S. Pat. No. 2,874,470. This patent demonstrates the interest of this combination, for its efficiency and for its ergonomic advantages.
The present invention takes up the combination of these means, irrigation and suction, adopting for each of these functions a coaxial configuration such as may be seen in U.S. Pat. No. 2,709,852 which describes a dental apparatus, or in U.S. Pat. No. 3,089,790, which describes a cleaning apparatus employing ultrasounds, with coaxial irrigation and suction.
In the surgical domain, apparatus do exist which take up this type of configuration in the same manner and use the same combination of means. However, these apparatus, known under the name of ultrasound surgical aspirators, present a certain number of drawbacks.
On the one hand, the hand-piece does not entirely integrate the circuits of the fluids, particularly the suction conduit and the irrigation conduit with, as consequence, an exaggerated increase in the diameter of this hand-piece. Any delicate operation is thus rendered difficult and tiring for the operator. The magnetostriction used in the known apparatus does not enable these drawbacks to be overcome.
On the other hand, the known technique of ultrasound surgical suction has the drawback of tearing the tissues in certain cases, in particular in the case of the suction being poorly adjusted. Conversely, in other cases, the destroying effect is insufficient and the process presents risks for the adjacent tissues in the case of exeresis of certain tumours, particularly cystic ones.
In such a known apparatus, there is no other solution, in the difficult cases requiring a highly efficient apparatus, than the reinforcement of the suction or of the ultrasounds applied to the single vibrating instrument also called "sonotrode". In this latter case, the power may be such that heating is considerable and the amplitude obtained at the end of the sonotrode may damage the adjacent tissues and vessels.
To this end, this ultrasound apparatus for the curettage or exeresis of biological tissues by irrigation of a liquid subjected to cavitation and by suction of the disaggregated tissue, comprising a hand-piece containing a transducer which is mechanically coupled to a vibrating instrument or sonotrode, is characterized in that the hand-piece is traversed right through, in the longitudinal direction, by a suction conduit connected on the one hand to a suction connector located at the rear end of the hand-piece and, on the other hand, to the internal part of the suction sonotrode.
The apparatus according to the invention has the advantages:
of integrating the circuits of the fluids from one end of the hand-piece to the other, offering the possibility of having a large suction diameter;
of lightening to a maximum this hand-piece which is like a tube;
of having, thanks to the high yield of the piezo-electricity, a minimum heating of the assembly. Thanks to an automatic adaptation of the amplitude of the vibration of the hand-piece as a function of the resistance of the tissue encountered, it is possible to act efficiently on any sort of tissue.
It is po
REFERENCES:
patent: Re25033 (1961-08-01), Balamuth et al.
patent: 3805787 (1974-04-01), Banko
patent: 3809977 (1974-05-01), Balamuth et al.
patent: 4223676 (1980-09-01), Wuchinich et al.
patent: 4316465 (1982-02-01), Dotson, Jr.
patent: 4428748 (1984-01-01), Peyman et al.
Dieras Francis
Escanecrabe Bernard
Larrieu Jean-Louis
Soulie Alain
Flanigan Allen J.
SATELEC
Scott Samuel
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