Oral/nasal cannula manifold

Abstract

An oral/nasal cannula manifold gas sampling and oxygen delivering manifold for sampling exhaled breath of a subject and delivering supplemental oxygen, the cannula including a main body portion having a suction port which is connected with a collection tube to a suction device for sampling the exhaled breath of the subject. A nasal prong upwardly protrudes from the main body portion and is positioned for insertion into a nostril of the subject to collect nasally exhaled breath. An oral conduit passage is embedded in a deflector/concentrator plate that extends downwardly from the main body portion. The straight conduit passages of the nasal and oral passages are connected to and aligned in the same plane whereby the opposed nasal and oral conduit passages are connected with the conduit passage of the suction port without any adjacent connected void volumes or dead spaces in any of the passages.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the field of oral / nasal cannula manifold for use in sampling breath of subjects, especially for the purpose of providing capnographic data concerning the subject.BACKGROUND OF THE INVENTION[0002]During anesthesia, and especially during sedation anesthesia or patient controlled analgesia it is often desirable to collect and analyze qualitatively and quantitatively the constituents of gases respired by the patient.[0003]Oral / nasal cannula manifolds are used to deliver supplemental oxygen to hospital patients who require respiratory support and to collect carbon dioxide samples from the patients to monitor respiration. The oral / nasal manifold is configured to be in close proximity to the oral cavity and also inserted into the nasal cavity of the patient. The patient's exhaled breath is drawn through the manifold passages to a gas analyzer to be analyzed. The results of this analysis provides an indication of respiratory adequ...

AI Technical Summary

Benefits of technology

[0008]The oral/nasal manifold of the present invention is provided for sampling exhaled breath of a patient and to thereby provide an optimal sampling of the subject's exhaled gases for analysis. The oral/nasal manifold is provided with a main body portion having formed therein a suction port which is dimensioned and adapted to be connected with a collection conduit to a suction device for capnographic analysis. A nasal prong protrudes from the main body portion and is positioned for insertion into a nostril of the subject to collect nasally exhaled breath of the subject. The nasal prong is provided with a straight cannula passage in fluid flow communication with a conduit passage of the suction port. An imbedded oral conduit also passes through the main body portion in an opposite direction and is provided also with a straight passage with a distal opening positioned for placement near the oral cavity or mouth of the subject to collect orally exhaled breath of the subject. This oral conduit passage is also in fluid flow communication with the conduit passage of the suction port.

[0009]The straight manifold passage of the nasal prong is connected to and aligned in the same plane as the straight conduit passage of the oral sampling port whereby the opposed nasal and oral passages are connected with the conduit passage of the suction port without any adjacent connected dead or void volumes and without any curvatures in the respective passages. Accordingly, the pressure of the exhaled nasal and oral gases of the subjec

Problems solved by technology

As the gas mixtures travel from the patient to the gas analyzer, the concentration of the gases can be effected by mixing of the component gases, which reduces the accuracy of the analysis of the sample by the gas analyzer, and reduces the amount of information obtained from the analysis.

The deficiency in these prior art designs is the undesirable diminishe

Images