Please select the most similar patent number from A, B, C and D. Which number is?
An oxygen mask comprises a mask and an oxygen cannula (2). The mask has an oxygen inlet (3). The oxygen cannula (2) is connected to the oxygen inlet (3). The mask comprises a mask main body (1) and an adhesive seal (4) connected to an edge of the mask main body (1) and fitting the profile of the face. The oxygen inlet (3) is arranged at a middle portion or an upper portion of a central linear protrusion of the mask main body (1). A one-way air outlet (5) is arranged at each of two sides of the oxygen inlet (3). The oxygen mask further comprises a slidable adhesive member (6) slidably sleeved onto the oxygen cannula (2) and attachable to the forehead. The oxygen mask can solve problems in the existing art in which a patient may develop redness, swelling around the auricle, and pain after wearing a mask for a long time, and the mask easily falls off so that oxygen cannot be efficiently supplied to the patient. The oxygen mask is highly comfortable to wear, does not fall off easily, and can efficiently supply oxygen, thus increasing an oxygen utilization rate.
A: An animal anaesthetic mask assembly, comprising: a mask body (1), wherein the mask body (1) is provided with an air inlet (2), air outlet (3), and a through hole (13), the air inlet (2) and the air outlet (3) are configured to communicate with the interior of the mask body (1), and the air inlet (2) is further configured to introduce a gas mixed with anesthetic into the mask body (1); and a mouth stick (4) provided separately from the mask body (1), wherein one end of the mouth stick (4) is configured to pass through the through hole (13) and be inserted into the oral cavity of an animal to be bitten and fixed by teeth of the animal.
B: A protective mask (1) that easily vents exhaled gas, comprising a mask body (11) and a nasal mask (12). An inner edge of the mask body (11) is provided with a first sealing ring (111); the nasal mask (12) has a ring-shaped structure, one end of which is in sealed connected with an inner side of the mask body (11), and the other end of which is provided with a second sealing ring (121); when the protective mask (1) is disposed on the face of a user by means of the first sealing ring (111) and the second sealing ring (121), a first chamber (101) covering the nose of the user is formed between the mask body (11) and an inner part of the nasal mask (12); a second chamber (102) covering the mouth of the user is formed between the mask body (11), an outer part of the nasal mask (12), and an inner part of the first sealing ring (111); the protective mask (1) further comprises a filter element (13), a first one-way valve (14) and a second one-way valve (15), and the filter element (13) is used to filter air flowing from an outer side of the mask body (11) into the inner side; the first one-way valve (14) is disposed on the mask body (11) located in the first chamber (101) to allow a gas to flow out from the first chamber (101) to an outer side of the protective mask (1); and the second one-way valve (15) is disposed on the ring-shaped structure of the nasal mask (12) to allow the gas to flow from the second chamber (102) into the first chamber (101).
C: A wearable monitoring device having an electrocardiogram monitoring function, comprising an oxygen-inhalation mask (1), 12 lead electrocardiogram electrodes (2), a control panel (3), and a flexible sleeve (4). The oxygen-inhalation mask (1) is fixedly connected to the control panel (3) by means of the flexible sleeve (4), a signal wire is provided inside the flexible sleeve (4), and the control panel (3) comprises a microcontroller (31) and a communication port (34). The oxygen-inhalation mask (1) is connected to an oxygen delivery pipe (11), and a joint between the oxygen-inhalation mask (1) and the oxygen delivery pipe (11) is provided with a piezoelectric film sensor (12) used for monitoring the respiratory rate of a patient. One side of the control panel (3) is provided with an electrocardiogram electrode interface (30), the 12 lead electrocardiogram electrodes (2) are connected to the electrocardiogram electrode interface (30) by means of a lead wire (5), and the electrocardiogram electrode interface (30) is electrically connected to the microcontroller (31). The 12 lead electrocardiogram electrodes (2) acquire electrocardiogram signals of the patient, and the microcontroller (31) sends the electrocardiogram signals by means of the communication port (34) to an oscilloscope for display. The monitoring device can supply oxygen to a critical patient for rescue, can also monitor the respiration and electrocardiogram state of the patient at any time, and has a simple structure, making it convenient for the patient to wear.
D: Provided are a respiratory mask and a ventilation therapy device; the respiratory mask comprises a cushion assembly, an elbow assembly, and a connection assembly arranged between the cushion assembly and the elbow assembly; the cushion assembly comprises a cup (6); the connection assembly comprises a frame (1) and a connection member (2); the elbow assembly comprises an elbow (3); an air discharge passageway (4) is formed between the connecting member (2) and the frame (1) and/or between the cup (6) and the frame (1); the air discharge passageway (4) is arranged so as to guide the exhaled air to disperse to, and be discharged around, the elbow (3). No matter which direction a patient wearing the respiratory mask faces, the air flow will not blow to the other person in the bed; furthermore, since the air flow is emitted in a ring shape, it effectively reduces noise from discharge of exhaled air.
Answer: D