Nasal hood with open-bottom mixing chamber

• US 4,454,880 A
• Filed: 05/12/1982
• Issued: 06/19/1984
• Est. Priority Date: 05/12/1982
• Status: Expired due to Fees

• Current Assignee: Ronald Cotner, Rudolph Muto
• Original Assignee: Ronald Cotner, Rudolph Muto
• Inventors: Muto, Rudolph, Cotner, Ronald
• Primary Examiner(s): Recla, Henry J.
• Application Number:
  US06/377,340
• Time in Patent Office: 769 Days
• Field of Search: 128/207.13, 128/207.18, 128/203.18, 128/203.22, 128/206.24, 128/205.25
• US Class Current: 128/205.25
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/0666 Nasal cannulas or tubing devices for improving normal breathing through the nose A61F5/08; nose filters A62B23/06; outside holding devices A61M25/02
• CPC Class Codes: A61M 16/0683 Holding devices therefor
• CPC Class Codes: A61M 2205/0216 Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
• CPC Class Codes: A61M 2210/0618 Nose

Abstract

An oxygen supply, hood for administering oxygen to a patient, departs from the enclosed masks and enlarged, open face shields, of the prior art by being formed as a unitary shell with a central dome, forming an open bottom, mixing chamber extending outwardly above the level of the mouth. The incoming oxygen forms a whirlpool, or vortex, within the chamber which mixes oxygen with moist exhaled air and permits the moist oxygen to also reach the mouth. The shell is firmly affixed by a recess over the bridge of the nose, by a strap across the upper lip and by a pair of integral wings, extending along the cheek bones to a band around the head. The gas delivery tube, within the mixing chamber extends under the nostrils, and along the upper lip of the patient. The gas discharge nozzles on the tube are directed only upwardly and outwardly, away from the nose and mouth, toward the inside face of the front wall of the shell.

Claims

1. A nasal hood for administrating oxygen to a patient, said hood comprising:

a shell of soft, flexible imperforate material shaped to fit over and cover the nose of a patient while leaving the patient'"'"'s mouth free to eat, drink, or breath;

said shell having a top wall, opposite side walls, a front wall, a rear opening, to accommodate the nose of the patient, and a bottom opening for exhalation of air, said front wall having a lower edge slightly inturned and said shell forming an open bottom dome adapted to project outwardly, above the level of the mouth of said patient, to form a mixing chamber;

the side walls of said shell having integral wings, each adapted to extend along the cheek bones of said patient for fixation by a band around the back of the head of patient;

and an oxygen supply tube, connectable to a source of oxygen, and extending along one of said wings, through said sidewall of said shell and into the mixing chamber of said dome, and positioned to be under the nostrils, and along the upper lip of the patient said tube having discharge nozzles directed only upwardly and outwardly away from the nose and mouth of the patient toward the front wall of said shell and adapted to create vortical circulation of incoming oxygen within said chamber;

said shell including a narrow strap connected to said opposite sidewalls and extending from one side wall to the other, across said rear opening so as to extend along the upper lip of the patient for additional firm fixation of said hood;

whereby said oxygen is mixed with moist air exhaled by said patient and some of said moist oxygen may be inhaled through the mouth of said patient.

2. A nasal hood as specified in claim 1 wherein:

said shell includes a thin, soft flexible upper edge arranged to flexibly seal the same against the skin below the eyes, to prevent oxygen from reaching the eyes of the patient, and a central recess fitting over the bridge of the nose.

3. A nasal hood as specified in claim 1 wherein:

said oxygen supply tube is divided into two branches, each branch extending along one of said integral wings and includes a sleeve having opposite ends extending through respective sidewalls of said shell, said sleeve containing said discharge nozzles, each branch being sleeved into one of the opposite ends of said sleeve.

4. A nasal hood comprising:

a shell of imperforate material having a central portion formed as an open bottom dome adapted to sealingly fit over the nose, below the eyes of a patient and to form an open bottom mixing chamber above the level of the mouth, and projecting outwardly from the face of a patient;

said shell having a pair of integral side wings extending rearwardly therefrom and adapted to be supported on the cheek bones for fixation by a band around the back of the head, a narrow strap connected to said shell and extending from one side of said dome to the other and adapted to rest on the upper lip portion of a patient and having an upper central recess conforming to the shape of, and closely fitting over, the bridge of the nose of a patient for fixation of said shell;

oxygen supply means including an oxygen supply tube connected to said shell and adapted to extend under the nostrils, along the upper lip of the patient within the mixing chamber of said open-bottom dome and having a pair of spaced apart oxygen discharge nozzles directing incoming, pressurized, oxygen away from the mouth and nose and only upward and outward in a direction to form a vortex within said chamber for mixing oxygen with moist exhaled air and directing some moist oxygen down into the mouth area of the patient;

said shell having a top wall with an upper edge which is thin, soft, resilient and pliable to conform to the configuration of the face of a patient and seal and the edge against leakage of oxygen into the eyes of the patient.

5. A nasal hood comprising:

a shell arranged to cover the nose of a patient while sealing the eyes against flow of oxygen and freeing the mouth to eat, drink, and breath;

said shell having a central dome, adapted to extend outwardly away from the upper lip, above the level of the mouth, said dome having side walls, a front wall with a slightly inturned curved lower edge, and forming an open-bottom, mixing chamber, when said shell is affixed on a patient; and

oxygen supply means including a tube connected to said shell and leading from a source of oxygen into said chamber and adapted to extend under the nostrils and along the upper lip of the patient and having apertures within said chamber directed only upwardly and outwardly against front wall to create a vortex therewithin for mixing oxygen with moist exhaled air;

a pair of wings, integral with said shell, and each arranged to extend along one of the opposite cheek bones of said patient, for affixation by a band around the back of the head of said patient; and

a narrow strap, integral with, and extending from each opposite side wall of said shell, across said chamber, and adapted to rest along the upper lip portion of said patient for firm affixation of said shell;

said shell including an upper edge of soft, deformable material for conforming to the contour of the face of said patient below the eyes, said edge including a central recess shaped to fit over the bridge of the nose for firmly affixing said mask while sealing said edge against leakage of oxygen to the eyes of said patient.