Thick-walled flexible probe for insertion in the trachea or resp

Details Thick-walled flexible probe for insertion in the trachea or resp Thick-walled flexible probe for insertion in the trachea or resp

1988-09-19

1990-11-13

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604280, A61M 2500

Patent

active

049698788

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a tubular flexible probe for insertion in the trachea or, respectively, in the bronchial system, especially for use as a suction catheter, with a duct formed by a tube having a length of about 30 to 50 cm and an outer diameter of about 5 to 8 mm, the end of this duct, which can be introduced into the bronchial system, being fashioned optionally as an annular collar and, if desired, exhibiting vent holes in the zone in front of the annular collar.
Probes of the type described above, as known, for example, from DAS No. 2,364,119, are utilized for removing, by suction, mucus and water from the lungs and the trachea. The tubular flexible catheter has an outer diameter of about 5-8 mm with an internal diameter for the suction duct of about 3.5-6 mm. The annular collar formed at the end introduced into the bronchial system facilitates introduction and prevents adherence by suction and injuries to the mucous membrane and the bronchi. Such catheters are intended for one-time, short-term usage.
Efforts have been made in recent times to introduce medicaments directly into the lung of the affected person in the treatment of emergencies. When using the conventional suction catheters for this purpose, there is the grave disadvantage that the medicaments must be introduced, after aspiration, through the suction duct and pass down into the lungs only in minor proportions on account of the size of the duct, while they otherwise remain in the catheter tube. The objective of introducing the medicaments completely and deeply into the lung and to distribute them therein is not achieved. Also, the known catheters are not equipped with attachments for fitting a syringe.
For respiration and oxygenation, so-called respirator tubes or balloon catheters are known for long-term usage; these are introduced only into the trachea and are unsuited for use as suction catheters since their open, beveled end would lead to considerable injuries to the bronchial tissue. In the respirator tube according to DOS No. 2,308,400, suction removal is to be made possible besides providing respiration, and for this purpose a catheter is guided coaxially through the tube, reducing and impeding the tube cross section. This is of no consequence in respiration, but presents a drawback in aspiration of the bronchi and lungs through this tube inasmuch as clogging of the cross section can occur. Furthermore, in case of the respirator tube according to DOS No. 2,308,400, aspiration can be performed only intermittently during exhaling. Irrigation and simultaneous suctioning off of secretions is impossible with the respirator tube according to DOS No. 2,308,400 since, with the irrigation fluid being supplied via the catheter, suction will have to be effected via the tube. As a consequence, the respirator tube would adhere by suction to the bifurcation, resulting in diffuse, gravest hemorrhaging with highest danger to life. The necessary respiration and, respectively, oxygen exchange cannot be performed simultaneously during irrigation and suctioning.
The invention is based on the object of providing a probe or a catheter with which medicaments can be introduced through the trachea and, respectively, bronchi to deeply into the bronchial system and, respectively, the lungs, optionally in conjunction with aspiration.
The invention attains the thus-posed object by means of a tubular flexible probe suitable for introduction into the trachea or, respectively, the bronchial system, by providing that the tube exhibits at least one duct having a diameter of about 1 mm up to maximally about 2 mm for passing medicaments and/or irrigation solution therethrough, the inlet of which tube can be equipped with an attachment for connecting a syringe, and the outlet of which terminates within the tube or at the tube end.
The invention is based on the realization that a maximally high pressure difference is required between the ends of the probe in order to obtain thereby a high flow rate for the deep introduction and distribution of medicaments into the l

REFERENCES:
patent: 3430631 (1969-03-01), Abramson
patent: 3848604 (1974-11-01), Sackner
patent: 4300550 (1981-11-01), Gandi et al.
patent: 4344436 (1982-08-01), Kubota
patent: 4468216 (1984-08-01), Muto
patent: 4488548 (1984-12-01), Agdanowski
patent: 4669463 (1987-06-01), McConnell
patent: 4735606 (1988-04-01), Davison
Schmidt, C. et al., New Endobronchial Tube for Administration of Drugs During Resuscitation, [Notfall/Medizin, vol. 14, 1988, pp. 673-677].

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