Breathing filter for absorbing carbon dioxide

Abstract

The utility model relates to a breathing filter for absorbing carbon dioxide, which comprises a tank body, one end of the tank body is provided with a patient end interface connected with a breathing tube of a patient, and the other end of the tank body is provided with an anaesthesia machine end interface connected with an anaesthesia machine. A filter membrane, filter paper, a patient end water absorption sponge, a partition plate, a carbon dioxide scavenger and an anaesthesia machine end water absorption sponge are sequentially arranged from one side, close to the patient end connector, of the tank body to the other side of the tank body, and a gas sampling connector and a connector cap which are communicated with the outside of the tank body are arranged at the position of the patient end water absorption sponge. According to the utility model, a carbon dioxide absorption function is added to the breathing filter, and meanwhile, the gas sampling interface is arranged before carbon dioxide absorption, so that a gas sampling line can be directly connected with the breathing filter by the monitor, the number of parts in a breathing loop is reduced, and the workload of medical personnel is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of respiratory filter technology, and in particular relates to a respiratory filter that absorbs carbon dioxide. Background Technology

[0002] The breathing circuit is a combined gas supply device connecting the anesthesia machine and the patient. It delivers an anesthetic gas mixture to the patient and returns the patient's exhaled gas, thus achieving normal oxygen and carbon dioxide exchange. A carbon dioxide filter containing a carbon dioxide absorbent absorbs carbon dioxide and moisture, preventing re-inhalation of carbon dioxide, a problem almost indistinguishable from hypoxia. When the carbon dioxide absorbent becomes ineffective, it needs to be replaced. For example, patent CN220002675U discloses a disposable carbon dioxide absorber. As a single-use item, it eliminates the need for separate replacement of the carbon dioxide absorbent, making it safer and effectively preventing injury to medical staff during carbon dioxide absorbent replacement.

[0003] End-tidal carbon dioxide (ETCO2) refers to the partial pressure or concentration of carbon dioxide in the mixed alveolar gas exhaled at the end of exhalation. It is the sixth basic vital sign, in addition to body temperature, respiration, pulse, blood pressure, and arterial blood saturation. Current ETCO2 testing involves real-time monitoring using a CO2 detector placed between the breathing circuit and the intubation tube. This design requires connecting additional components to the breathing circuit, increasing the workload of healthcare workers. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a breathing filter that absorbs carbon dioxide, which can collect the carbon dioxide exhaled by the patient, making it easier to monitor the patient's end-tidal carbon dioxide level and reduce the workload of medical staff.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a breathing filter for absorbing carbon dioxide is provided, including a canister containing a carbon dioxide scavenger inside. One end of the canister is provided with a patient end interface for connecting to a patient's breathing tube, and the other end is provided with an anesthesia machine end interface for connecting to an anesthesia machine. From one side of the canister near the patient end interface to the other side, a filter membrane, filter paper, a patient end absorbent sponge, a carbon dioxide scavenger, and an anesthesia machine end absorbent sponge are arranged in sequence. The patient end absorbent sponge is provided with a gas sampling interface communicating with the outside of the canister.

[0006] Preferably, the gas sampling interface is located at the top of the absorbent sponge at the patient end.

[0007] Preferably, the gas sampling interface is connected to the gas sampling line of the monitor.

[0008] Preferably, the gas sampling interface is fitted with an interface cap.

[0009] Preferably, the inner wall of the tank is provided with a partition for separating the patient-end absorbent sponge from the carbon dioxide scavenging agent.

[0010] The beneficial effects are as follows: This invention adds carbon dioxide absorption to the breathing filter, and simultaneously sets up a gas sampling interface before carbon dioxide absorption, allowing the monitor to directly connect the gas sampling line to the breathing filter, reducing the number of components within the breathing circuit and alleviating the workload of medical staff. Furthermore, placing the gas sampling interface at the top of the absorbent sponge at the patient's end helps keep the gas inside the sampling line dry, reducing water accumulation and avoiding interference from moisture in the monitoring. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a breathing filter that absorbs carbon dioxide.

[0012] Figure 2 A schematic diagram of a breathing filter that absorbs carbon dioxide.

[0013] Among them, 1-patient end interface; 2-filter membrane; 3-filter paper; 4-patient end absorbent sponge; 5-partition; 6-carbon dioxide scavenger; 7-anesthesia machine end absorbent sponge; 8-anesthesia machine end interface; 9-interface cap; 10-gas sampling interface. Detailed Implementation

[0014] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0015] like Figure 1 As shown, this utility model provides a carbon dioxide-absorbing respiratory filter, including a canister containing a carbon dioxide scavenger 6. One end of the canister has a patient-end interface 1 for connecting to a patient's breathing tube, and the other end has an anesthesia machine-end interface 8 for connecting to an anesthesia machine. From one side of the canister near the patient-end interface 1 to the other side, a filter membrane 2, filter paper 3, a patient-end absorbent sponge 4, a partition 5, the carbon dioxide scavenger 6, and an anesthesia machine-end absorbent sponge 7 are arranged sequentially. A gas sampling interface 10, communicating with the outside of the canister, is provided at the patient-end absorbent sponge 4. The gas sampling interface 10 is connected to the gas sampling line of a monitor. When not in use, an interface cap 9 is also fitted onto the gas sampling interface 10 to prevent contamination of the respiratory filter.

[0016] In one specific embodiment, the gas sampling interface 10 is located at the top of the absorbent sponge 4 at the patient end, which helps to keep the gas inside the sampling line dry, reduce water accumulation, and avoid interference from water vapor to the monitoring.

[0017] The inner wall of the tank is provided with a partition 5 for separating the patient-end absorbent sponge 4 from the carbon dioxide scavenger 6. In a... Figure 2 In the specific embodiment shown, there are four partitions 5, which extend from the inner wall of the tank towards its axis.

[0018] This invention is applicable to scenarios requiring mechanical ventilation via an anesthesia machine during general anesthesia. The filter membrane 2 filters out pathogens such as viruses and bacteria exhaled by the patient. The absorbent sponges on both sides of the carbon dioxide scavenger 6 maintain the humidity of the gas within the breathing circuit while preventing dust from the carbon dioxide scavenger 6 from entering the breathing water circuit. The carbon dioxide scavenger 6 is generally medical-grade calcium lime, but sodium lime or barium lime can also be used.

Claims

1. A respiratory filter for absorbing carbon dioxide, comprising a canister having a carbon dioxide scavenger disposed therein, said canister having a patient end interface at one end for connection to a patient breathing tube and an anesthetizing machine end interface at the other end for connection to an anesthetizing machine, characterized in that, The canister is provided with, from one side to the other side of the patient end interface, in sequence, a filter membrane, filter paper, a patient end water absorption sponge, a partition, a carbon dioxide scavenger, and an anesthesia machine end water absorption sponge, and the patient end water absorption sponge is provided with a gas sampling interface communicating with the outside of the canister.

2. A respiratory filter for absorbing carbon dioxide according to claim 1, characterized in that The gas sampling interface is arranged at the top of the patient end water absorption sponge.

3. The respiratory filter according to claim 1, wherein, The gas sampling interface is connected with a gas sampling line of a gas sampling interface monitor.

4. The respiratory filter for absorbing carbon dioxide according to claim 1, wherein An interface cap is sleeved on the gas sampling interface.

5. The respiratory filter for absorbing carbon dioxide according to claim 1, wherein The inner wall of the canister is provided with a partition for separating the patient end water absorption sponge from the carbon dioxide scavenger.

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