Double-layer nasal mask

Abstract

The invention discloses a double-layer nasal mask which comprises an inner layer which can be attached on the face of a patient to cover the nose part, and an outer layer which is arranged outside the inner layer; the inner layer is provided with an air inlet channel; an air chamber is formed between the inner layer and the nose part; an air exhaust channel is formed between the inner layer and the outer layer; the air chamber and the air exhaust channel are connected by a one-way air valve; the air flows unidirectionally from the air chamber to the air exhaust channel; and at least part of the periphery of the inner layer is folded inwards so as to form an inner-layer crease which can be tightly attached on the face of the patient to play the sealing role. The sealed belt formed by the sticking between the inner-layer crease and the face of the patient causes the nasal mask to have obviously improved sealing effect so as to prevent air form leakage, thus avoiding undesirable impact on the patient due to the leakage of the air, and improving the curative effect.

Description

technical field [0001] The invention relates to a double-layer nasal mask for delivering medical gas to a patient. Background technique [0002] At present, in the medical industry, there are two types of nasal masks and mouth-nose masks used in conjunction with ventilators. Since the nasal masks do not need to cover the mouth, it is convenient for the patient to speak without making the face feel hot and humid, and it is beneficial for oxygen to directly enter the patient. Respiratory system and other advantages are gradually being widely used. Yet existing nasal mask mostly is single-layer structure, and the shortcoming of this structure is: 1, patient can only inhale with nose and exhale with mouth when breathing, and this brings certain inconvenience to patient; 2, clinically There is such a situation that when a dentist uses an analgesic ventilator to deliver anesthetic gas to a patient, the same respiratory nasal mask will be used repeatedly on many different patients...

AI Technical Summary

Problems solved by technology

Yet existing nasal mask mostly is single-layer structure, and the shortcoming of this structure is: 1, patient can only inhale with nose and exhale with mouth when breathing, and this brings certain inconvenience to patient; 2, clinically There is such a situation that when a dentist uses an analgesic ventilator to deliver anesthesia gas to a patient, the same respiratory nasal mask will be used repeatedly on many different patients. Therefore, there is a possibility of cross-infection between the patient and the doctor

However, due to the non-detachability of the single-layer structure, one-time use will greatly increase the cost of medical treatment

Later, the appearance of some double-layer nasal masks, such as the double-layer nasal mask disclosed in Chinese patent CN200720172765.9, only replaces the inner layer after one use, which solves these two problems to a certain extent, but , due to the lack of a well-designed gas discharge structure, during use of the existing double-layer nasal mask, the gas exhaled by the patient easily flows out from the gap around the nasal mask, causing the patient's cheeks and eyes to feel hot and humid, and affecting medical treatment Effect

Images