Method for administration of therapeutic gases

Abstract

Methods for administering medical gases are disclosed including providing the medical gas in compressed gas cartridges containing an amount of the medical gas preferably corresponding substantially to a unit dose of the medical gas and providing a patient with means to access the medical gas from the gas cartridge upon need therefor. Apparatus for administering medical gases is also disclosed including a housing, a cassette associated with the housing containing at least one compressed gas cartridge preferably containing at least an amount of the medical gas substantially as required for a single dose and a patient supply interface to provide the medical gas to the patient.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional of U.S. application Ser. No. 10 / 632,158, filed on Jul. 31, 2003, which claims the benefit of the filing date of U.S. Provisional Application No. 60 / 404,830, filed on Aug. 20, 2002, the disclosures of which are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION [0002] Historically, most medical gases which are considered to be pharmaceuticals by the Food and Drug Administration (FDA) whether they are USP grade or NF grade or have undergone a New Drug Approval (NDA) are supplied in the form of compressed gas cylinders, generally containing large gas volumes and for return and refilling by distributors and the like. These large cylinders create significant problems in terms of their handling and use, as well as their shipment which is generally as hazardous materials. [0003] One exception to this is oxygen gas. Oxygen has had a long history of use by outpatients and home care pat...

AI Technical Summary

Benefits of technology

[0023] In accordance with the present invention, these and other objects have now been realized by the discovery of a method of easing a patient's pain and anxiety from atrial defibrillation comprising causing the patient to inhale an effective amount of a medical gas and activating an atrial defibrillation device while the patient is under the influence of the medical gas, whereby the inhalation of the medical gas produces in the patient at least one effect such as analgesia, analgesia, anxiolysis, and anterograde amnesia immediately prior to, during and immediately after the delivery of an atrial defibrillating shock by an atrial defibrillation device.

[0024] In accordance with an embodiment of the method of the present invention, the method includes easing a patient's pain and anxiety from ventricular defibrillation comprising the automatic activation of a ventricular internal cardioverter defibrillator or VF-ICD or a multi-functional implant including VF-ICD capability, or the application of a ventricular defibrillating shock using an automatic external defibrillator or AED, and the patient subsequently inhaling an effective amount of a medical gas after the shock from the VF-ICD or AED when conscious, whereby the inhalation of the medical gas produces in the patient at least one effect such as analgesia, anxiolysis, and anterograde amnesia.

Problems solved by technology

These large cylinders create significant problems in terms of their handling and use, as well as their shipment which is generally as hazardous materials.

Other gases which have been used to some extent for medical purposes such as N2O are rarely used on a home care basis and particularly are not permitted for self administration because of the dangers involved and the inability to control their use.

In addition, these systems require the use of separate gas pressure regulators and / or blenders in order to assist in the application of these gases, and none of these known systems is present for the administration of therapeutic gases for short periods of time for specific medical purposes, and particularly not in an outpatient or home environment for self application.

Certain medical gases with therapeutic effects, such as nitrous oxide and xenon, are subject to potential recreational misuse and abuse.

Cylinders of nitrous oxide and / or xenon containing large volumes of the gas and easy access to the cylinder contents by the use of traditional valves may be attractive to such non-prescribed use, or outright theft from a non-medical location, such as a patient's home, and is a major reason, in addition to concerns about overdosing, that such gases are limited to use at medical sites where security and medical supervision exists.

Furthermore, the device described in this patent also does not address issues of safety and control regarding the potential for misuse or recreational abuse of N2O that would be required for approval by a regulatory body such as the FDA, and therefore is not applicable to practical medical use.

This device is not intended for the normal respiration of a medical gas for any significant time period, and cannot accommodate a gas mixture for such purposes.

Additional systems include the MEDIMIX unit of AGA Linde Health Care which includes a single premixed cylinder with 50 mole percent nitrous oxide and 50 more percent oxygen with a regulator, tubing, a demand valve and a face mask, and other elements, as well as the ENTONOX unit from BOC, Inc., which again requires medical personnel for use and has a weight and a size making it impossible to be carried and used with a single hand in a portable manner, and is therefore not usable for self-administration by an outpatient at home, work or other locations.

Use of such a product by an outpatient, or supervised by a medical person, is highly unlikely due to safety and other regulatory issues generated by the inclusion of the ether-based anesthetic in the mixture.

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