Surgery – Respiratory method or device – Means placed in body opening to facilitate insertion of...
Patent
1992-07-22
1994-10-18
Burr, Edgar S.
Surgery
Respiratory method or device
Means placed in body opening to facilitate insertion of...
12820714, A61M 1600
Patent
active
053558740
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
An oropharyngeal tube is fitted to a patient after intubation by a tracheal tube and serves a number of purposes: allow a cannula to be introduced at any time via the tube for the purpose of aspirating secretions, and furthermore, the tube should act as a bite block to prevent the inserted tracheal tube from being squeezed off or even bitten off.
In addition, the oropharyngeal tube should, as far as possible, hold the tongue and prevent it from falling back and closing the airways. This results in the anatomical shape of the tube which comprises, in succession as seen from the side, a transverse securing flange, which is located externally on the patient's lips, an adjoining short, substantially straight portion and in turn, adjoining the latter, a long, curved portion.
There are two fundamentally different types of pharyngeal tube: profile. Since it is not possible to incorporate a bite block, this oropharyngeal tube is always made of a hard material. shape. Either it consists entirely of hard material or the actual tube consists of soft rubber or plastics, it being necessary to provide in the region of the straight portion a bite block of hard material which is generally a separate part that is pushed over the actual tube. Such oropharyngeal tubes are described, for example, in the January 1978 edition of the journal "Health Devices" in the article "Artificial Airways" starting on page 67.
Furthermore, it is known to use such a tube also for securing the inserted tracheal tube, in that the holding means for the oropharyngeal tube simultaneously holds the tracheal tube.
Such a solution, in which the holding means for the two tubes comprises a rubber band extending around the patient's neck, is described in an article from "Der Anasthesit" (The Anaesthetist), Vol. 13, part 5, May 1964, pages 172 and 173, Springer-Verlag, Berlin, under the title "Eine einfache Haltevorrichtung fur Endotracheal-Katheter" (A simple holding device for endotracheal catheters) by J. Schara, but the oropharyngeal tube used therein is a known Guedel tube supplemented by an advantageous holding means.
The known oropharyngeal tubes have a number of disadvantages: with the cleaning of the tube for reuse, since it is very difficult to monitor the state of cleanliness.
Putting together the actual tube and an additional bite block is disadvantageous, since the internal diameter is not uniform and therefore there is a step between the bite block and the tube which and
As a result of its cross-sectional shape the Berman type has a large number of free edges which, because it always has to be made of hard material, can easily result in injury to the patient.
The described holding means also has shortcomings, since every time the holding means for the oropharyngeal tube is released the tracheal tube is automatically also detached from its securing means, so that in such a case the tracheal tube can very easily become dislodged or slip out. The greatest disadvantage is, however, that access to the mouth for cleaning purposes is almost completely blocked, and aspiration is difficult to carry out, even via the tube. From the point of view of manufacture, this tube with the band is far too expensive.
It is an object of the present invention, therefore, to provide an oropharyngeal tube that is simple and risk-free in use, that is re-usable but is nevertheless simple and inexpensive to produce and, furthermore, enables the tracheal tube to be reliably secured.
According to the invention, the oropharyngeal device comprises an extended body having a comparatively shorter approximately straight portion and a comparatively longer curved portion adjoining the straight portion, the extended body having a substantially constant U-shaped transverse cross-section along an entire length thereof to provide a U-shaped opening extending along one side thereof; a transverse securing flange attached to an end of the straight portion remote from the curved portion; and a hard bite block formed integrally with the extended body and lo
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patent: 3930507 (1976-01-01), Berman
patent: 4067331 (1978-10-01), Bermann
patent: 4270529 (1981-06-01), Muto
patent: 4919126 (1990-04-01), Baildon
"Der Anaesthesist", vol. 13, part 5, May 1964; pp. 172 and 173.
Burr Edgar S.
Lewis Aaron J.
Striker Michael J.
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