Surgery – Respiratory method or device – Means placed in body opening to facilitate insertion of...
Patent
1984-09-14
1986-07-08
Recla, Henry J.
Surgery
Respiratory method or device
Means placed in body opening to facilitate insertion of...
12820714, A61M 1600
Patent
active
045987050
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improved trachea cannula comprising a curved outer tube and an inner tube that is slidably and removably fitted within said outer tube. The outer tube is insertable into the trachea of a patient through a neck hole that is opened surgically by laryngotracheotomy in a manner known per se.
DESCRIPTION OF THE PRIOR ART
There are a large number of patients suffering from various kinds of throat troubles, such as laryngitis, cancer of the larynx etc. Many whose lives have been saved by surgical treatment, especially by a total removal of the larynx. Such people can survive the operation by 5 to 10 or even 20 years. However, as a result of said operation they are obliged to use a trachea cannula, a device as indicated briefly above, and through this they are put to great inconvenience. It is vital that they should use the trachea cannula, otherwise the neck hole made by laryngotracheotomy for breathing will narrow, and this may lead to suffocation.
The known prior art trachea cannulae used all over the world save the patients from suffocation. It is a disadvantage, however, that the outer end of the inner tube of such devices opens directly into the surroundings of the patient, and when they cough, secretion from the trachea is discharged into the ambient air, endangering the health of other people, and sometimes causing disgust in others. Because of the reflex-like, spontaneous and sudden nature of the coughing the patients are not able to cover the free opening of the cannula with their handkerchiefs in time. Especially soon after the operation, or in case of patients who had been suffering from chronic tracheal catarrh, the discharge of secretion may be extremely excessive, and this puts the patients and people in their surroundings to an increased inconvenience. Experience has shown that the quality of life of patients who have been cured from their basic throat disease by surgical treatment as described above, is poor. They often develop depression, and may exclude themselves from social contacts.
The object of the present invention is to provide an improved trachea cannula which, in addition to enabling the patient to breathe freely, prevents infectious, and sometimes disgusting secretion from being discharged into the ambient air.
BRIEF DESCRIPTION OF THE INVENTION
The above object is achieved by an improved trachea cannula of the type previously indicated, in which, according to the present invention, the improvement lies in said trachea cannula being equipped with a box-like receptacle having at least one breathing hole and being attached to the open outer end of said inner tube in order to prevent secretion discharge into the surroundings of the patient. In preferred embodiments of the improved trachea cannula according to the invention the box-like receptacle may be of the disposable kind made of a plastic material. It may have a closed front wall, bottom, top and side walls and a rear wall facing the patient's chest. At least one breathing hole is arranged in the rear wall, or in at least one of the side walls of the receptacle in the near proximity of a coupling hole for the open outer end of the inner tube. The coupling hole should be cut from the rear wall of the receptacle so as to match at least partially in shape and the dimensions of the open outer end branch of said inner tube.
With other embodiments, there are two breathing holes in the rear wall of the receptacle, arranged at both sides adjacent to the coupling hole in a manner that the breathing holes and the coupling hole form a single shaped opening within the rear wall of the receptacle.
It has turned out to be advantageous if the improved trachea cannula according to the invention has also fixing means for securely attaching the receptacle to the open end branch of the inner tube in such a manner that allows it to be releasable. In certain embodiments, both said outer and inner tube may have flanges at their open outer ends respectively. The fixing means is pre
REFERENCES:
patent: 2039142 (1936-04-01), Brehar
patent: 2804076 (1957-08-01), Giraudon
patent: 3088466 (1963-05-01), Nichols
patent: 3334631 (1967-08-01), Stebleton
patent: 3827440 (1974-08-01), Birch et al.
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