Waste gas exhaust device of anesthesia machine

Abstract

The utility model discloses a waste gas removal device of an anesthesia machine, which aims to effectively collect and remove waste gas generated in an anesthesia process, reduce pollution in an operating room and protect health of medical staff and patients. The device comprises a device body, an air inlet, an air outlet, a buffering air bag, a cross-shaped pipe, a negative pressure valve, a three-way pipe, a backflow pipe, an exhaust pipe and the like. The device body comprises a lower pump body and an upper pump body, and air inlet pipelines and air outlet pipelines of the lower pump body and the upper pump body are communicated and share one air inlet and one air outlet. The device body further comprises a bottom plate used for fixing the lower pump body and a supporting plate used for fixing the upper pump body, universal wheels are arranged at the bottom of the bottom plate, and moving is convenient. The air inlet bypass is connected with a buffer pipe through a second valve body, the volume of the buffer pipe is 1.5 times that of the buffer air bag, and the tail end of the buffer pipe is connected with a flowmeter. The top of the device body is obliquely upwards provided with the operation panel, and operation is convenient. The device main body reduces the maintenance cost through the self-cleaning function, prolongs the service life of equipment, and has important practical value.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a waste gas removal device for an anesthesia machine. Background Art

[0002] An anesthesia machine is a device used to deliver inhaled anesthetics and control breathing during surgery. In practice, the amount of fresh gas in the anesthesia circuit often exceeds the patient's needs. The excess anesthetic gas discharged into the operating room is called waste anesthetic gas.

[0003] The health risks of anesthetic waste gases cannot be ruled out. Long-term exposure to these gases poses a potential risk, as these risks may be delayed, develop slowly, and may not manifest until future generations. The impact of trace amounts of anesthetic waste gases on human health is generally believed to be threefold: first, psychological and behavioral effects. Anesthesiologists may experience impairments in hearing, memory, comprehension, numerical reading, and procedural skills after inhaling certain concentrations of these gases. Second, chronic genetic effects, manifesting as chronic poisoning and carcinogenesis. Third, reproductive health effects. The impact of anesthetic waste gas pollution on the reproductive function of female operating room staff is perhaps the most concerning issue. Reports indicate that anesthetic waste gases not only increase the incidence of miscarriage among female operating room staff but also slightly increase the incidence of congenital malformations in their children. Furthermore, the inhaled anesthetics isoflurane and enflurane have varying degrees of impact on liver and kidney function. Long-term exposure to trace amounts of these inhaled anesthetics can cause leukopenia and damage to liver, kidney, and brain function. Operating room staff may suffer from headaches, laryngitis, muscle weakness, sporadic liver disease and other diseases, which are believed to be related to long-term inhalation of trace amounts of anesthetic waste gas.

[0004] The applicant discovered that the hospital's anesthesia machines typically start operating around 6:00 a.m. on weekdays and remain shut down until the last surgery of the day. During long-term use, the exhaust gas removal device's pipes are frequently corroded by anesthetic waste gases, resulting in poor sanitary conditions and a high risk of clogging. Traditional maintenance methods require regular manual cleaning, which is inconvenient. Therefore, it is particularly important that the exhaust gas removal device be able to self-clean when the anesthesia machine is shut down. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide an anesthesia machine waste gas removal device that can effectively remove waste gas generated by an anesthesia machine to outside the operating room.

[0006] The technical solution adopted by the utility model to solve the above-mentioned problem is: an anesthesia machine waste gas removal device, including a device main body, the device main body is provided with an air inlet and an air outlet, the air inlet is connected to a buffer air bag, one end of the buffer air bag is connected to a cross-shaped tube, the upper end of the cross-shaped tube is connected to a negative pressure valve, the end of the cross-shaped tube opposite to the buffer air bag is connected to the waste gas outlet of the anesthesia machine, the air outlet is connected to a straight end of a three-way pipe, the other straight end of the three-way pipe is connected to a reflux pipe through a one-way valve, the reflux pipe adopts a plastic bellows, the other end of which is connected to the lower end of the cross-shaped pipe, and the vertical end of the three-way pipe is connected to the exhaust pipe to the outside through the first valve body.

[0007] Preferably, the device body comprises a lower pump body and an upper pump body, the air inlet pipe of the lower pump body and the air inlet pipe of the upper pump body are connected to share an air inlet, and the air outlet pipe of the lower pump body and the air outlet pipe of the upper pump body are connected to share an air outlet.

[0008] Preferably: the device body also includes a base plate for fixing the lower pump body and a support plate for fixing the upper pump body, four outer brackets are vertically fixed at the four corners above the base plate, one end of the support plate is connected to the two outer brackets, and the other end of the support plate is connected and fixed to the base plate through two inner brackets at its bottom.

[0009] Preferably, universal wheels are provided at the four corners below the bottom plate.

[0010] Preferably, the bottoms of the lower pump body and the upper pump body are both provided with fixing bases.

[0011] Preferably, the air inlet bypass is connected to a buffer tube through the second valve body. The buffer tube is a plastic bellows, and its volume is 1.5 times the volume of the buffer airbag.

[0012] Preferably, the end of the buffer tube is connected to a flow meter.

[0013] Preferably, an operation panel is provided on the top of the device body obliquely upward.

[0014] Preferably, the shell of the device body is composed of multiple groups of sheet metal parts, and the sheet metal parts are provided with multiple groups of weight-reducing holes.

[0015] Preferably, a winding column for winding the buffer tube is provided on the rear side of the device body.

[0016] Compared with the prior art, the present invention has the following advantages and effects: BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the waste gas removal device of the anesthesia machine according to the embodiment of the utility model.

[0018] Figure 2It is a left side view of the waste gas removal device of the anesthesia machine according to the embodiment of the present utility model.

[0019] Figure 3 It is a rear view of the waste gas removal device of the anesthesia machine according to the embodiment of the present utility model.

[0020] Figure 4 It is a partially enlarged view of the waste gas removal device of the anesthesia machine according to the embodiment of the present utility model.

[0021] Figure 5 This is a block diagram of the normal working mode of the waste gas removal device of the anesthesia machine according to the embodiment of the utility model.

[0022] Figure 6 This is a block diagram of the self-cleaning mode operation of the anesthesia machine waste gas removal device according to an embodiment of the present utility model.

[0023] Figure numbers: device body 1, air inlet 101, air outlet 102, bottom plate 103, outer bracket 104, inner bracket 105, support plate 106, weight reduction hole 107, operation panel 108, universal wheel 109, winding column 1010, lower pump body 2, base 201, air inlet pipe 202, air outlet pipe 203, upper pump body 3, buffer airbag 4, cross tube 5, negative pressure valve 6, three-way pipe 7, first valve body 8, buffer tube 9, second valve body 10, exhaust pipe 11, flow meter 12, return pipe 13, one-way valve 14. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0025] See also Figure 1 - Figure 6 The utility model provides a waste gas removal device for an anesthesia machine, which is specifically used to effectively collect and remove waste gas generated during anesthesia, so as to reduce the pollution of waste gas in the operating room and protect the health of medical staff and patients. Specifically comprising: a device body 1, the device body 1 is provided with an air inlet 101 and an air outlet 102, the air inlet 101 is connected to a buffer air bag 4, one end of the buffer air bag 4 is connected to a cross-shaped tube 5, the upper end of the cross-shaped tube 5 is connected to a negative pressure valve 6, the end of the cross-shaped tube 5 relative to the buffer air bag 4 is connected to the waste gas outlet of the anesthesia machine, the air outlet 102 is connected to a straight end of a three-way pipe 7, the other straight end of the three-way pipe 7 is connected to a return pipe 13 through a one-way valve 14, the return pipe 13 adopts a plastic corrugated pipe, the other end of which is connected to the lower end of the cross-shaped pipe 5, the vertical end of the three-way pipe 7 is connected to the exhaust pipe 11 through the first valve body 8 to the outside of the room.

[0026] See also Figure 5Specifically, in this embodiment, when the device body 1 is in normal working mode: the anesthetic waste gas of the anesthesia machine (ventilator or circulation loop) enters the air inlet 101 of the device body 1 through the cross-shaped pipe 5, and then is discharged to the outside through the exhaust pipe 11 connected to the vertical end of the three-way pipe 7 at the air outlet 102. If the average amount of anesthetic waste gas introduced over a period of time is greater than the suction flow, the buffer airbag 4 expands; if the average amount of anesthetic waste gas introduced is less than the suction flow, the buffer airbag 4 contracts, and the negative pressure valve connected to the upper end of the cross-shaped pipe 5 opens to allow indoor air (dry air) to be inhaled. The return pipe 13 is connected to the lower end of the cross-shaped pipe 5, and the other end of the return pipe 13 is provided with a one-way valve 14 to achieve one-way conduction, so that the anesthetic waste gas cannot flow from the cross-shaped pipe 5 to the three-way pipe 7. In addition, since the return pipe 13 is made of a plastic corrugated pipe, it has the ability to expand and contract, and the anesthetic waste gas can also enter it, causing the return pipe 13 to expand. The buffer airbag 4 and the return pipe 13 work simultaneously, and have a double buffering effect. Thus, the pressure inside the device body 1 does not affect the operation of the anesthesia machine. Since waste gas often flows in like a tide at the end of exhalation, the cushioning effect of the cushioning airbag 4 allows the device to only require a relatively small suction flow to meet the effect of removing anesthetic waste gas.

[0027] See also Figure 6 When the device body 1 is in the self-cleaning mode: (1) the device body 1 is running, the passage at one end of the cross-shaped tube 5, which was originally used to connect to the exhaust outlet of the anesthesia machine, is closed by the cock, the first valve body 8 is opened, and the second valve body 10 is closed until the buffer air bag 4 is deflated and the return pipe 13 is extended to the initial state. At this time, the device body 1 is in a negative pressure state, so that the anesthetic waste gas inside it is basically discharged; (2) the device body 1 continues to run, the cock at one end of the cross-shaped tube 5 is removed, the first valve body 8 is closed, and the second valve body 10 is opened. The indoor air enters the device through the cross-shaped tube 5, the negative pressure valve, and the buffer pipe 9 through the air inlet 101. The remaining part of the anesthetic waste gas in the device body 1 flows through the air outlet 102 and then flows into the return pipe 13 through the one-way valve 14. The cyclic input is until the buffer air bag 4 is full and the return pipe 13 is extended. By repeating the above (1) and (2) operations, the pipeline in the device body 1 is cleaned. The device body 1 of this embodiment can not only effectively remove anesthetic waste gas and reduce pollution in the operating room, but also reduce maintenance costs and increase the service life of the equipment through the self-cleaning function.

[0028] In this embodiment, the device body 1 includes a lower pump body 2 and an upper pump body 3. The air inlet pipe 202 of the lower pump body 2 and the air inlet pipe 202 of the upper pump body 3 are connected to each other and share an air inlet 101. The air outlet pipe 203 of the lower pump body 2 and the air outlet pipe 203 of the upper pump body 3 are connected to each other and share an air outlet 102. The upper pump body 3 and the lower pump body 2 use a flow-metering gas ring vacuum pump, which is completely oil-free and water-free for compression. The two pumps are started and stopped alternately (the start and stop of the vacuum pump is controlled by the electrical control cabinet). The operating mode adopts the uninterrupted alternating start and stop of the two pumps (upper pump body 3 and lower pump body 2). For example, after the lower pump body 2 starts for half an hour, the upper pump body 3 starts, and the lower pump body 2 stops at the same time, and the cycle repeats. The pressure inside the device body 1 can also be adjusted through the coordinated work of the upper pump body 3 and the lower pump body 2: when the average inlet amount of anesthetic waste gas is greater than the suction flow, the pressure inside the device body 1 is too high, and the suction power of a single pump body can no longer meet the requirements. At this time, another pump body needs to be started, and the two pumps are started at the same time to increase the suction flow, thereby reducing the pressure inside the device body 1; on the contrary, when the average inlet amount of anesthetic waste gas is less than the suction flow, one of the pumps is stopped and the other pump continues to work to reduce the suction flow, thereby increasing the pressure inside the device body 1. The above process can maintain the pressure inside the device body 1. At the same time, when the device body 1 is in uninterrupted operation, the dual pump body design is fault-tolerant. When one of the pumps needs to stop working for maintenance, it is only necessary to cut off the connection between the air inlet pipe 202 and the air outlet pipe 203 of the pump body and the air inlet 101 and the air outlet 102 of the device body 1. This can ensure the normal exhaust gas removal work of the device body 1. The design of alternating operation of the dual pump bodies can reduce the mechanical loss caused by the continuous operation of a single pump, which is also of great significance for improving the overall service life of the device body 1.

[0029] The device body 1 also includes a base plate 103 for fixing the lower pump body 2 and a support plate 106 for fixing the upper pump body 3. Four outer brackets 104 are vertically fixed at the four corners above the base plate 103. One end of the support plate 106 is connected to the two outer brackets 104, and the other end of the support plate 106 is connected and fixed to the base plate 103 through two inner brackets 105 at its bottom.

[0030] Universal wheels 109 are installed at the bottom of the base plate 103 to facilitate the movement of the device body 1. Hospitals no longer need to equip every operating room with universal wheels, allowing flexible deployment to meet the anesthesia needs of various surgeries. The housing of the device body 1 is constructed from sheet metal with elongated through-holes, which conserve material and also serve as heat dissipation holes. The bottoms of the lower and upper pump bodies 2 and 3 are each equipped with a fixing base 201, allowing the pump motor to be suspended in the air, enhancing heat dissipation.

[0031] The air inlet 101 bypasses the second valve body 10 and is connected to a buffer tube 9. This is a plastic bellows with a volume 1.5 times that of the buffer airbag 4. The length of the buffer tube 9 is calculated based on the volume of the anesthesia machine's buffer airbag 4. The volume of the buffer tube 9 should be greater than that of the buffer airbag 4 to prevent the leakage of waste anesthetic gases.

[0032] The end of the buffer tube 9 is connected to a flow meter 12. Connect a flow meter 12 to the end of the buffer tube 9 and reset the flow meter 12 to zero (the flow sensor of another anesthesia machine can be used instead), connect the suction tube to the central suction and make sure that gas is sucked out, then turn on the power of the anesthesia machine. After confirming that there is no gas leakage in the breathing circuit, fill the buffer air bag 4 with oxygen, open the second valve body 10 (overflow valve), and discharge all the gas in the buffer air bag 4. Observe the reading of the flow meter 12 at this time. No matter what the circumstances, make sure that this reading is less than or equal to the capacity of the buffer air bag 4. Generally, 2 / 3 of the capacity of the buffer air bag 4 is appropriate, and repeated tests should be stable within this range each time. If the reading of the flow meter 12 is less than 1 / 2 of the capacity of the buffer air bag 4, it means that the suction volume is too large and should be appropriately reduced to 2 / 3 of the capacity of the buffer air bag 4. After the above debugging is completed, it can be used during anesthesia. It is important to ensure that each pipeline is unobstructed, especially the buffer tube 9, the end of which must be open, otherwise the negative pressure may be transmitted to the anesthesia circuit and endanger the patient's safety.

[0033] An operation panel 108 is provided at an angled angle on the top of the device body 1. This angled angled arrangement is ergonomically designed to alleviate fatigue and discomfort caused by long-term operation by medical staff. The operation panel 108 should be provided with components such as switches, indicator lights, and pressure gauges for controlling or displaying the operating status of the device body 1. A winding column 1010 for winding the buffer tube 9 is provided on the rear side of the device body 1. One end of the buffer tube 9 is connected to the air inlet 101 of the device body 1 through the second valve body 10. The remaining buffer tube 9 is led to the rear of the device body 1, coiled and fixed thereon, and the far end is ensured to be open, so that it is neat and orderly, and convenient for medical staff to operate.

[0034] The above contents described in this specification are merely examples of the present invention. Those skilled in the art of the present invention may make various modifications, additions, or substitute similar methods to the specific embodiments described, as long as they do not deviate from the contents of this specification or exceed the scope defined by the claims, and shall fall within the scope of protection of the present invention.

Claims

1. An anesthesia machine waste gas removal device, characterized by: The device comprises a main body, which is provided with an air inlet and an air outlet. The air inlet is connected to a buffer air bag, one end of the buffer air bag is connected to a cross-shaped tube, the upper end of the cross-shaped tube is connected to a negative pressure valve, one end of the cross-shaped tube opposite to the buffer air bag is connected to the waste gas outlet of the anesthesia machine, the air outlet is connected to a straight end of a three-way pipe, the other straight end of the three-way pipe is connected to a reflux pipe through a one-way valve, the reflux pipe adopts a plastic corrugated pipe, the other end of which is connected to the lower end of the cross-shaped tube, and the vertical end of the three-way pipe is connected to the exhaust pipe to the outside through the first valve body.

2. The waste gas removal device of an anesthesia machine according to claim 1, characterized in that: The device body includes a lower pump body and an upper pump body. The air inlet pipe of the lower pump body and the air inlet pipe of the upper pump body are connected to share an air inlet, and the air outlet pipe of the lower pump body and the air outlet pipe of the upper pump body are connected to share an air outlet.

3. The waste gas removal device of an anesthesia machine according to claim 2, characterized in that: The main body of the device also includes a base plate for fixing the lower pump body and a support plate for fixing the upper pump body. Four outer brackets are vertically fixed at the four corners above the base plate. One end of the support plate is connected to the two outer brackets, and the other end of the support plate is connected and fixed to the base plate through two inner brackets at its bottom.

4. The waste gas removal device for an anesthesia machine according to claim 3, characterized in that: Universal wheels are provided at the four corners below the bottom plate.

5. The waste gas removal device for an anesthesia machine according to claim 3, characterized in that: The bottoms of the lower pump body and the upper pump body are both provided with fixing bases.

6. The waste gas removal device for an anesthesia machine according to claim 1, characterized in that: The air inlet bypass is connected to a buffer tube through a second valve body. The buffer tube is a plastic bellows, and its volume is 1.5 times the volume of the buffer airbag.

7. The waste gas removal device for an anesthesia machine according to claim 6, characterized in that: The end of the buffer tube is connected with a flow meter.

8. The waste gas removal device for an anesthesia machine according to claim 1, characterized in that: An operation panel is provided on the top of the device body obliquely upward.

9. The waste gas removal device for an anesthesia machine according to claim 1, characterized in that: The shell of the device body is composed of multiple groups of sheet metal parts, and the sheet metal parts are provided with multiple groups of weight-reducing holes.

10. The waste gas removal device for an anesthesia machine according to claim 1, characterized in that: A winding column for winding and hanging the buffer tube is provided on the rear side of the device body.

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