Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1989-12-26
1991-06-18
Green, Randall L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 45, 604902, 433 95, A61M 100
Patent
active
050246151
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention is related to a surgical aspiration device, which is intended for use in surgical operations for removing blood, other liquids and/or matter from the operation area.
The object of the present invention is to obtain a surgical aspiration or suction device by which blood, wound secret and solid matter can be removed during an operation, whereby aspiration can be done either in an atraumatic manner or for dissection and suction of tissues.
BACKGROUND OF THE INVENTION
From Swedish Patent No. 7413157-4 (publ. no. 383959) a surgical suction device is previously known, which comprises a point aspirator and an outer aspiration tube arranged round the point aspirator, whereby the outer tube is axially displaceable in order to enable point aspiration or sump aspiration. The suction device is produced to enable alternative point or sump aspiration, i.e., aspiration in a limited area, or aspiration for removal of larger amounts of liquid from a greater area. This aspiration cannot be made to work twice in an atraumatic manner, and on aspiration tissue will be invaginated by suction adheration.
Use of the aspiration technique in surgical operations generally requires the establishment of an air pressure lower than the ambient pressure at a certain spot and thereby the achievement of a flow of air, liquid, tissue parts or other matter in a desired direction. The principle implies the establishment of a reduced pressure in a tube or a mouthpiece attached thereto, which is directed to the spot where aspiration is to take place. In a free open mouthpiece connected to a vacuum source a balance is rapidly established between flow rate and vacuum level.
On aspiration of a liquid however, a column of liquid will be built up, as air does not continuously reach the mouthpiece. The rapid movement of the liquid column in the tube causes a piston movement which by its force makes tissue adhere by suction and invaginate into the mouthpiece. Suction adheration frequently causes a trauma in the tissue, which trauma can be more or less serious depending on where it occurs, and which in any event is a damage to organs and body, which must be healed. Further, suction adheration means that the work in the wound area is impeded as the operator must eliminate the adheration with a special manipulation and force.
SUMMARY OF THE INVENTION
The above mentioned problems have now unexpectedly become capable of solution by the present invention, whereby the liquid column mentioned may be broken and suction adheration is counteracted. The invention relates to a surgical aspiration device comprising a tubular handle, which at one end thereof has an outlet for connection to a vacuum source, and which at the other end thereof has a projecting point aspirator shaped as a tube which at least at its front end is provided with an axially (frontally) arranged aspiration opening. The invention is characterized in that the handle further is provided with an outer tube arranged substantially concentically with the point aspirator, which outer tube extends along the entire point aspirator and which has an opening at its front end adjacent to the front end of the point aspirator, whereby an interstice is arranged between the outer tube and the point aspirator, and whereby the outer tube has an air inlet opening adjacent to the handle, through which opening air is allowed to pass along the outside of the point aspirator to the aspiration opening thereof.
An embodiment of the invention is characterized in that the outer tube extends further beyond the front end of the point aspirator.
A further embodiment of the invention is characterized in that the point aspirator is arranged without any joint to the outer tube at its front end.
A still further embodiment of the invention is characterized in that the outer tube and the point aspirator are joined to each other at the front ends thereof, whereby the point aspirator has at least one laterally arranged opening adjacent to the front end thereof, for connection between the
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Astra Meditec Aktiebocag
Green Randall L.
Shay Randy
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