Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1985-02-15
1988-02-09
Howell, Kyle L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
A61M 500
Patent
active
047239409
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to the perforation, in particular the puncture of a membranous member while utilizing vacuum fixation. Such a method may be applicable to veterinarian techniques or techniques which involve the determination of the exact composition of substances which are located on either side of an elastic, possibly permeable membrane e.g. by taking a sample. In medicine, when the general method of vacuum fixation is used, the protection of the invention may extend to the device which causes the vacuum fixation of a tissue subjected thereto before it is perforated or punctured respectively.
The necessity to take samples from specimen e.g. which are surrounded by one or more elastic foils is well-known in laboratory research. In order to prevent possible contamination while sampling, e.g. by bacteria, it may be desirable to take a sample very cautiously via flexible membrane walls which act like a sterile sluice as it were. A similar sampling occurs also during the cultivation of specific organisms, whether or not in connection with multiplication or for research into syndromes or impacts of other materials. In all these cases the intended vacuum fixation is applicable.
The object of the invention is to perforate the membranous member at the eact location, while utilizing vacuum fixation, in particular to puncture without causing of undesirable damages or undesirable contamination inside the space which is enclosed by the membranous member.
The method according to the invention is based on the transfer of a specific amount of solid, gaseous or fluid medium to or from a space through an enclosing, flexible membranous member which is enclosed by said membrane, thereby utilizing a suction force that is applied on part of the membrane surface, resulting in a locally increasing yet allowable deformation by tensioning of said surface, after which the locally pre-tensioned membrane is punctured by means of an instrument, in particular a needle-shaped instrument, the required amount of medium is transferred with respect to said space through a supply or drain tube fixed in or at said instrument, and the instrument is then withdrawn from the membrane surface puncture, the local suction force then being released and whereafter the membrane elastically returns to its original position.
Vacuum fixation while utilizing puncture technique includes several possibilities. The invention can be used to perform a Douglas puncture e.g. to obtain peritoneal fluid. When a Douglas puncture is performed, it can happen that the tissue of the back part of the vagina dome and the Douglas peritoneum, which is located behind it, give way in the direction of the abdominal cavity. In that case, danger arises that other tissues, e.g. the intestines, will be punctured inadvertently and unintendedly, which can give rise to infection. Due to these dangers, one is obliged to operate through surgery in order to obtain peritoneal fluid, practically exclusively by means of laparoscopy.
SUMMARY OF THE INVENTION
According to the invention a device is provided, which solves among others the problem mentioned above while utilizing vacuum fixation, because the complications which can occur during a Douglas puncture are avoided. In addition to this, the procedure is considerably less painful and the chances of success in obtaining peritoneal fluid are notably increased.
There are other medical applications in which the possibility to control punctures is useful and can be accomplished by using thinner needle systems, such as the application of the echo-transducer, using vacuum fixation in order to visualize structures, spaces or organs that are to be punctured. One can touch a follicle of an ovary at sight by means of a vaginal transducer and suck in ova in order to fertilize in vitro, to puncture the ovary for research of virulent cells, to visualize the peritoneal fluid present, or to confirm or deny deformations of the intestines in the Douglas cavity. It can also be applied on pleura, abdominal, kidney and l
REFERENCES:
patent: 1934046 (1933-11-01), Demarchi
patent: 2945496 (1960-07-01), Fosdal
patent: 4177814 (1979-12-01), Knepshield et al.
patent: 4222380 (1980-09-01), Terayama
patent: 4299219 (1981-11-01), Norris, Jr.
patent: 4393870 (1981-02-01), Wagner
Akuaba B.V.
Howell Kyle L.
Sykes Angela D.
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