JPH0340291Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dome for a negative pressure respirator used mainly for patients with chronic respiratory failure.

[Conventional technology] Negative pressure ventilators that support physiological negative pressure breathing are useful for providing respiratory support for patients with chronic respiratory failure due to pulmonary fibrosis, emphysema, sequelae of pulmonary tuberculosis, etc., as well as neuromuscular diseases. be.

However, conventional negative pressure ventilators are large and heavy, similar to an iron lung, and even with an armor-shaped dome, the body shape of each patient is different, so the dome and patient's body There are problems such as air leaking from the gap between the dome and the surface, making it impossible to obtain sufficient negative pressure, or it taking too much time to exhaust the air inside the dome and reach the negative pressure necessary to support breathing. It was hot. In order to prevent air leakage from the periphery of the dome, methods such as wearing a jacket over the dome, attaching a rubber tube around the dome, or wrapping a wrap around the gap have been devised. None of these methods were satisfactory, as they were not sufficiently effective in preventing leakage, and the expansion and contraction of the jacket and tube required a long time to reach the necessary negative pressure.

In addition, because the periphery of the dome is tightly fixed to the body to prevent air leakage, there were problems such as rubbing on the ribs and collarbones, especially in the front chest, and redness and pain in the skin.

[Problems to be solved by the invention] The purpose of the invention is to provide a dome for a negative pressure respirator that eliminates the gap between the dome and the patient's body surface and does not cause pain when worn. be.

[Means for Solving the Problems] That is, the present invention has a fitting portion made of an elastic material on the peripheral edge of a dome body made of a hard material and having an opening for connecting to an air duct, and a cross section of the fitting portion is The shape is such that the lower side edge of the dome periphery is circular, and the inner edge is sloped toward the top, and the fit part at the front part of the dome is similar to the fit part at the left, right, and rear parts of the dome. A dome for a negative pressure respirator, characterized by having a width 1.5 to 5 times the width of the dome.

The negative pressure ventilator dome of the present invention will be described below with reference to the drawings.

The ventilator dome of the present invention has an external shape as shown in Fig. 1, and is attached to the patient's chest like armor as shown in Fig. 3, with an opening 3 at the top.
It inflates the patient's chest by connecting it to an air duct and creating negative pressure inside it, and it must be of a size and shape that covers at least the anterior chest, and the abdomen and side chest. It is more preferable if it covers the abdomen. The material of the dome body 1 must be a hard material that does not deform even when negative pressure or positive pressure is applied during use, such as light metal such as aluminum alloy, hard vinyl chloride resin, methacrylic resin, or polycarbonate resin. , thermoplastic plastics such as polyamide resins, laminates of thermosetting plastics such as phenolic resins, epoxy resins, unsaturated polyester resins, reinforced plastics (FRP), carbon fiber reinforced plastics (CFRP), etc. can be used. It is desirable that the material is high in strength and relatively light.

Furthermore, a fitting part 2 made of an elastic material is attached to the peripheral edge of the dome in order to fit tightly against the patient's body surface and prevent air leakage. Elastic materials include natural rubber, synthetic rubber, and various thermoplastic elastomers such as styrene, olefin, ester, urethane, and polybutadiene, or foam materials of these materials (e.g., urethane sponge, etc.)
Especially when a foam material is used, it is preferable to further coat the surface with a soft resin such as urethane resin, vinyl chloride resin, or vinyl acetate resin. There is also a method of using a tube made of the various thermoplastic elastomers mentioned above, and the tube may be filled with air, a foam material such as urethane sponge, or foam beads such as polystyrene or polyethylene. .

Further, in order to eliminate the gap with the patient's body surface, it is preferable that the fitting portion 2 be inclined toward the inside of the dome so that the circumference becomes shorter toward the inside. That is, as shown in FIG. 1d, the cross-sectional shape of the fit portion 2 has a smooth circular shape with a rounded lower end 4 of the dome periphery, and an inner end 5.
is sloped toward the top where an opening 3 is provided,
By providing the dome in a wedge shape that opens inward, it not only fits the patient's body surface without causing any discomfort when the dome is worn, but also allows the fit portion 2 to fit tightly around the dome as shown in Figure 1c. Since the dome is narrower toward the inside and has a shorter circumference, even if the size of the dome is somewhat large, it can be worn so that the patient's body fits snugly inside.

Furthermore, as shown in Fig. 2, by widening the width of the fitting part 6 at the front part of the dome that contacts the patient's anterior chest and increasing the contact area with the body surface, the load on the anterior chest can be reduced. This is more preferable because it can eliminate the problem of rubbing on the parts that hit the ribs and collarbones. The width of the front fitting part 6 is preferably about 4 to 15 cm. On the other hand, the width of the foot portions 7 on the left and right and rear portions of the dome may be approximately 2 to 8 cm, and if the width of the foot portion 6 on the front portion is 1.5 to 5 times the width of the foot portions 7 on the left and right and rear portions, The dome as a whole is well balanced and there is no discomfort or tenderness during use, making it suitable.

[Effects of the invention] By using the dome of the invention, the dome and the patient's body surface can be easily brought into close contact, there is no air leakage from gaps, and there is no discomfort when wearing the dome. It is extremely useful in the medical industry because problems such as chafing and tenderness are eliminated and effective treatment can be performed using negative pressure artificial respiration.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of a dome for a negative pressure respirator according to the present invention, in which a is a top view, b is a side view, c is a bottom view, and d is a cross-sectional view. Figure 2 shows another embodiment of the present invention, in which a is a top view and b is a top view.
is a side view. FIG. 3 is a view from the back of a patient wearing the dome of the present invention.

Claims (1)

[Claims for Utility Model Registration] The dome body is made of a hard material and has an opening for connecting to an air duct.The dome body has a fitting part made of an elastic material on the periphery thereof, and the cross-sectional shape of the fitting part is the same as the lower surface of the dome periphery. A dome for a negative pressure respirator, characterized in that the side end is circular and the inner end is sloped toward the top. The dome for a negative pressure ventilator according to claim (1), wherein the fit portion at the front portion of the dome has a width of 1.5 to 5 times the width of the fit portion at the left, right, and rear portions of the dome.