JP5336093B2 - Oxygen cannula - Google Patents

Description

  The present invention relates to an oxygen cannula that supplies oxygen to a user. More specifically, the present invention relates to a plastic oxygen cannula in which flame propagation preventing means is mounted on the oxygen cannula.

  In recent years, the number of patients suffering from chronic respiratory diseases such as pulmonary emphysema, pulmonary tuberculosis sequelae and chronic bronchitis has been increasing, and inhalation of high-concentration oxygen is given to these patients whose carbon dioxide and oxygen gas exchange functions in the lung have decreased. Oxygen inhalation therapy is performed. Examples of a supply source of therapeutic oxygen gas or concentrated oxygen gas include use of a high-pressure oxygen cylinder, a liquid oxygen cylinder, an oxygen concentrator, and the like. This therapy is not an invasive treatment operation in a medical institution such as an injection, but is a treatment method in which high concentration oxygen is inhaled by patient respiration using an oxygen concentrator for a long time. This is permitted by the Pharmaceutical Affairs Law.

  In oxygen therapy, it is forbidden to handle fires such as smoking cigarettes while sucking oxygen from cannula, but this disease often develops due to smoking and is supplied with oxygen for a long time. For this reason, I sometimes handle fires such as smoking while sucking oxygen, thinking that it would be better if it was casual or small. Due to the high oxygen concentration atmosphere, even a flame retardant plastic cannula may ignite with a large flame and expand the fire.

  As a means for preventing the spread of these fires, Japanese Patent No. 2598126 discloses that the cannula is covered with flame-retardant fiber, and Japanese Patent Laid-Open No. 2006-280470 discloses that a nonflammable joint is inserted into the cannula. Proposals focused on preventing the spread of fire.

Japanese Patent No. 2598126 JP 2006-280470 A

  In home oxygen therapy, 90-100% oxygen gas is supplied to a patient's nostril through a cannula from a medical oxygen gas supply source such as an oxygen concentrator, an oxygen cylinder, or a liquid oxygen cylinder. The cannula is made of a plastic material such as vinyl chloride or silicon. In an atmosphere with an oxygen concentration of 21% in the atmosphere, vinyl chloride and the like are flame retardant materials, but almost all plastic materials burn in an environment where 100% oxygen is supplied.

  Therefore, when handling oxygen concentrators, etc., warnings from manufacturers, doctors, fire departments, etc. have been issued to the effect that smoking or use of fire in the oxygen inhalation state is strictly prohibited. Case exists.

  While an oxygen cannula is attached to the nose, an open flame does not usually approach the tip of the cannula, but in many cases, the cigarette ignites while smoking and then ignites the cannula, causing a fire. Once the cannula is ignited, it continues to burn with a large flame until the supply of oxygen stops. In particular, when a flame enters the tube from the oxygen outlet of a plastic cannula, if the oxygen supply is continuously supplied by the tube, the flame will spread at a very high rate as the flame runs on the inner surface of the tube. .

  The present invention has been found to prevent fire spread when an oxygen cannula is ignited by mounting a metal mesh inside a plastic oxygen cannula.

That is, the present invention is a cannula that supplies oxygen gas from an oxygen supply source, and includes a metal mesh part through which oxygen gas can pass inside a resin oxygen supply path of the cannula, and is in direct contact with the user's nostril and nose periphery. Provided is a plastic oxygen cannula in which an outer peripheral surface of an oxygen jetting portion is made of a resin material .

  Further, according to the present invention, the wire mesh part is an oxygen outlet of the oxygen cannula, a branch part in which one cannula extending from the oxygen supply source branches into two for right and left ears, or between cannulas or between the cannula and oxygen. An oxygen cannula provided at a connecting portion for connecting to a supply source, particularly an oxygen cannula constituted by a metal pipe having a wire mesh mounted therein.

  The present invention also provides an oxygen cannula in which the metal component of the metal mesh of the metal mesh part is made of iron, stainless steel, copper, brass, titanium, or an alloy thereof, and the mesh of the metal mesh is 1.0 mm or less.

  The oxygen cannula of the present invention secures the supply of oxygen gas by providing a wire mesh part inside the oxygen supply path, and when the cannula is ignited, propagation of the flame running inside the cannula can be blocked by the metal mesh part. It is possible to prevent the spread of fire and the spread of fire to the upstream side. In addition, by providing a wire mesh at the oxygen outlet, such as a nasal prong, the ignition of the oxygen cannula itself can be suppressed.

  An oxygen cannula (nasal cannula) is generally used for oxygen inhalation such as home oxygen therapy. Such a cannula is an oxygen supply tube that is inserted into a patient's nasal cavity by fixing the cannula branched on the left and right ears to guide the oxygen gas supplied from an oxygen concentrator or oxygen cylinder to the user's nostril. This is a tool for supplying oxygen gas to a user's nostril by connecting an open end of a cannula to an oxygen outlet having a nasal prong.

  As shown in FIG. 1, the oxygen supply device such as an oxygen concentrator, an oxygen cylinder, or a liquid oxygen container is used to extend a tube such as vinyl chloride or silincon, and the oxygen to which high concentration oxygen is supplied through the extension 4 is divided into the branch 2. Then, it is further extended or branched, and around the neck circumference 3, oxygen is supplied from the oxygen outlet 1 to the nose.

  FIG. 2 is a schematic view showing an embodiment of the oxygen outlet part 1 of a plastic cannula, and an opening of 0.75 mm inside two nasal prongs inserted into the nostril of the oxygen outlet part 1 made of polyethylene resin. The stainless steel circular wire mesh 1a was attached. Further, in FIG. 3, a circular metal mesh 1b made of stainless steel having a mesh opening of 0.75 mm is mounted inside the connecting portion between the oxygen jet port 1 and the two branch cannulas. If the oxygen spout 1 is made of a metal tube, the oxygen itself is not flammable and therefore does not ignite. On the other hand, the oxygen spout part 1 is in direct contact with the nostrils and the periphery of the nose, and adopts a resin material to avoid the patient's uncomfortable feeling when wearing it, such as metal sensation. By adopting a stainless steel wire mesh for the prong portion, it is possible to achieve an ignition prevention effect.

  FIG. 4 shows that a stainless steel wire mesh 2a having an opening of 1 mm is attached to the inside of a cannula branching portion 2 that is fixed to the neck and ears when attached to a patient from one oxygen cannula extended from an oxygen supply device. Is. The connection itself is usually made of resin, but by using a metal material, it is possible to ignite the oxygen cannula and block the flame that has spread to the upstream side, and by attaching its internal wire mesh, It is possible to cut off the flame that runs inside the cannula and prevent burning.

  In addition, a wire mesh is installed inside the same metal connection part at the connection part of the extension tube used by connecting two or more oxygen cannulae or at the connection part (not shown) between the oxygen cannula and the oxygen supply source. By using the thing, it is possible to prevent similar burning to the oxygen supply source.

  The wire mesh used may be made of stainless steel, iron, copper, brass, titanium, or an alloy material thereof. The opening of the wire mesh is set in consideration of the effect of blocking the flame and the pressure loss during normal oxygen supply. In order to obtain a flame blocking effect, it is preferable to use a wire mesh having a mesh opening of 1 mm or less and a mesh opening of 0.5 mm to 1 mm in consideration of pressure loss during supply. Naturally, the flame blocking effect is improved by using a plurality of the metal meshes more than one.

It is a schematic perspective view of the oxygen cannula which is an embodiment of the present invention. 1 is a schematic view of an oxygen outlet portion 1 of an oxygen cannula that is an embodiment of the present invention. FIG. 3 is a schematic view of an oxygen outlet 1 of an oxygen cannula that is another embodiment of the present invention. It is the schematic of the branch part 2 of the oxygen cannula which is an embodiment of the present invention.

Explanation of symbols

1 Oxygen cannula oxygen spout 1a wire mesh 1b wire mesh 2 oxygen cannula branch 2a wire mesh 3 oxygen cannula neck 4 extension of oxygen cannula

Claims (5)

A cannula for supplying oxygen gas from an oxygen supply source, comprising a metal mesh part through which oxygen gas can pass inside a resin oxygen supply path of the cannula, and an oxygen ejection part directly contacting a user's nostril or nose periphery Plastic oxygen cannula whose outer peripheral surface is made of resin material . Gold network unit, oxygen spout portion of the oxygen cannula, bifurcation one cannula extending from the oxygen supply source is branched into two for right and left ear hanging, or connect the cannula to each other or cannula and oxygen supply The oxygen cannula according to claim 1, wherein the oxygen cannula is provided at a connecting portion.   The oxygen cannula according to claim 2, wherein the wire mesh part is constituted by a metal tube having a wire mesh mounted therein.   The oxygen cannula according to claim 3, wherein the metal component of the wire mesh of the wire mesh portion is made of iron, stainless steel, copper, brass, titanium, or an alloy thereof. The oxygen cannula according to claim 4 , wherein the opening of the wire mesh is 1.0 mm or less.

Images