Anesthetic gas concentration monitor
By adding a platinum wire catalyst and a resistance strain gauge to the anesthetic gas concentration monitor, the problem of inaccurate measurement caused by overlapping infrared absorption peaks was solved, and high-precision anesthetic gas concentration monitoring was achieved.
Patent Information
- Application Number
- CN202422940930.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-30
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-11-30
AI Technical Summary
Existing anesthetic gas concentration monitors suffer from inaccurate measurement results due to overlapping infrared absorption peaks when multiple anesthetic gases are present, making it difficult to achieve high-precision concentration monitoring.
A platinum wire catalyst is added to the infrared spectrometer. Oxygen is supplied to the sealed box through an oxygen supply mechanism. The platinum wire catalyzes the oxidation reaction of the anesthetic gas. The gas concentration is estimated by monitoring the resistivity change with a resistance strain gauge. The monitoring accuracy is ensured by a detachable design.
It improves the accuracy and precision of anesthetic gas concentration monitoring, ensuring efficient monitoring in complex gas environments.
Smart Images
Figure CN223637383U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of medical equipment, and particularly relates to an anaesthetic gas concentration monitor. BACKGROUND
[0002] In modern medical operations, the use of anaesthetic gas is very common, and accurate monitoring of the concentration of anaesthetic gas is crucial to ensuring patient safety and the smooth progress of the operation. Traditional anaesthetic gas concentration monitors mainly use infrared light emitted by an infrared light source. When the infrared light passes through the gas chamber, it is absorbed by the gas. Different gas molecules have different absorption spectra for infrared light, that is, they absorb infrared light of specific wavelengths. The monitor measures the intensity change of the transmitted light, and according to this change, the concentration of the gas can be calculated by the controller.
[0003] Although infrared spectroscopy has been widely used in anaesthetic gas concentration monitoring, the infrared absorption peaks of many compounds may overlap, which increases the difficulty of spectral analysis. In an anaesthetic gas concentration monitor, if multiple anaesthetic gases exist at the same time, their absorption peaks will interfere with each other, resulting in inaccurate measurement results. For example, the infrared absorption peaks of commonly used anaesthetic gases such as isoflurane, desflurane, and sevoflurane may overlap at certain wavelengths, making it difficult to distinguish these gases with a single infrared spectrum. Due to the problem of spectral overlap, the measurement accuracy of the prior art is limited, especially in a complex mixed gas environment, it is difficult for traditional methods to achieve high-precision concentration measurement. SUMMARY
[0004] The utility model aims at providing an anaesthetic gas concentration monitor to solve the problems raised in the background.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] An anaesthetic gas concentration monitor, comprising:
[0007] A gas supply branch pipe, an infrared spectrum analyzer, and a sealed box, the gas supply branch pipe is connected to the infrared spectrum analyzer, the infrared spectrum analyzer is connected to the sealed box through a gas inlet pipe, the right side wall of the sealed box is connected to an exhaust pipe, the back side wall is connected to an oxygen supply mechanism, a filter mechanism is installed on the exhaust pipe, a top cover is connected to the top of the sealed box through a locking assembly, and a contrast monitoring mechanism is installed on the sealed box.
[0008] The contrast monitoring mechanism comprises a bearing cylinder, clamping assemblies symmetrically fixed at both ends of the bearing cylinder, two clamping assemblies fixedly installed on the inner wall of the sealed box, a platinum wire threadedly wound on the outer wall of the bearing cylinder, first and second wires electrically connected to both ends of the platinum wire through barrier assemblies, the other end of the first wire electrically connected to a controller, the other end of the second wire electrically connected to a resistor, the resistor electrically connected to the controller through a wire, the controller and the resistor fixedly installed on the front side wall of the sealed box, and a resistance strain gauge fixedly installed on the front side wall of the sealed box, both terminals of the resistance strain gauge installed on the resistor.
[0009] Preferably, the oxygen supply mechanism comprises an oxygen supply bottle, the output port of the oxygen supply bottle is connected to an electromagnetic valve through a gas supply pipe, the other connecting port of the electromagnetic valve is connected to a filter through a gas supply pipe, and the other end of the filter is connected to the sealed box through a gas supply pipe.
[0010] Preferably, the filtering mechanism comprises a filter box, a filter tank and an exhaust valve, the inside of the filter box is filled with activated carbon, the air inlet of the filter box is connected to the exhaust pipe, the air outlet is connected to the air inlet of the filter tank, the inside of the filter tank is filled with alkaline solution, the air outlet of the filter tank is connected to the exhaust pipe, and the exhaust valve is installed at the tail of the exhaust pipe.
[0011] Preferably, the clamping assembly comprises two fixed blocks fixedly installed on the end side of the bearing cylinder and a limiting block fixedly installed on the inner wall of the mounting box, the two fixed blocks are symmetrically arranged, the end side of the opposite end of each fixed block is provided with a movable slot and a moving port, the movable slot and the moving port are in communication with each other, a clamping block is slidably arranged in the movable slot, a spring is fixedly arranged between the clamping block and the movable slot, a push block is slidably arranged in the moving port, the bottom end of the push block is fixedly connected to the clamping block, two clamping grooves matched with the clamping blocks are symmetrically provided on the limiting block, and the end portions of the two clamping blocks are inserted into the clamping grooves.
[0012] Preferably, the two barrier assemblies each comprise a connecting terminal and a quick connector, the two connecting terminals are fixedly installed on the ports at both ends of the platinum wire, the two quick connectors are fixedly installed on the front side wall of the sealed box, the outer ports are respectively connected to the first wire and the second wire, and the connecting terminals are inserted into the inner ports of the quick connectors.
[0013] Preferably, the locking assembly comprises two first supporting ears and two second supporting ears, the first supporting ears are fixedly connected to the top cover, the second supporting ears are fixedly connected to the outer wall of the sealed box, and the first supporting ears are fixedly connected to the second supporting ears through bolts.
[0014] Preferably, the plurality of air holes are evenly arranged on the cylinder body of the bearing cylinder, and air inlets are arranged at both ends of the bearing cylinder.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] (1) in order to improve the monitoring precision, on the basis of infrared spectrum analyzer analysis monitoring, add a secondary monitoring device, through the installation of platinum wire in the sealed box, and through the air inlet pipe, exhaust pipe realizes the injection of anesthetic gas, through the oxygen supply mechanism to the sealed box continuous oxygen supply, with platinum wire as catalyst, complete the oxidation reaction of anesthetic gas, when the concentration of anesthetic gas is different, the rate and degree of oxidation reaction will also be different, so the heat generated will also be different, the temperature of platinum wire will also change accordingly, in turn cause the change of resistivity, through the resistance strain gauge accurately monitor the change of resistivity, thereby deducing the change of anesthetic gas concentration, thereby improving the accuracy of anesthetic gas concentration monitoring.
[0017] (2) through the locking assembly, the sealed box can be opened and closed under the condition of ensuring the airtightness, and the detachability of the bearing cylinder is realized through the clamping assembly, the platinum wire will be left with reaction products on the surface after the oxidation reaction of anesthetic gas, the bearing cylinder is disassembled, and the platinum wire is cleaned, so that the subsequent monitoring work can be carried out, finally, the detachability between the platinum wire and the lead wire is realized through the blocking assembly. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is one of the perspective views of the utility model;
[0019] Figure 2 It is the second perspective view of the utility model;
[0020] Figure 3 It is the sectional view of the sealed box of the utility model;
[0021] Figure 4 It is the sectional view of the filtering mechanism of the utility model;
[0022] Figure 5 It is the sectional view of the comparative monitoring mechanism of the utility model;
[0023] Figure 6 It is the structure schematic view of the clamping assembly of the utility model;
[0024] Figure 7 It is the sectional view of the comparative monitoring mechanism of the utility model; Figure 3
[0025] In the figure: 1, gas branch pipe; 2, infrared spectrum analyzer; 3, sealed box; 4, top cover; 5, air inlet pipe; 6, locking assembly; 61, first lug; 62, bolt; 63, second lug; 7, clamping assembly; 71, fixed block; 72, clamping block; 73, spring; 74, push block; 75, limiting block; 8, blocking assembly; 81, connecting terminal; 82, quick connector; 9, bearing cylinder; 10, platinum wire; 11, first wire; 12, second wire; 13, controller; 14, resistor; 15, resistance strain gauge; 16, oxygen supply bottle; 17, gas supply pipe; 18, electromagnetic valve; 19, filter; 20, exhaust pipe; 21, filter box; 22, filter tank; 23, exhaust valve. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0027] Embodiment one:
[0028] Please refer to Figures 1-7 The anesthesia gas concentration monitor shown in the figure, it includes:
[0029] Gas branch pipe 1, infrared spectrum analyzer 2 and sealed box 3, gas branch pipe 1 is communicated with infrared spectrum analyzer 2, infrared spectrum analyzer 2 is communicated with sealed box 3 through air inlet pipe 5, the right side wall of sealed box 3 is communicated with exhaust pipe 20, the rear side wall is communicated with oxygen supply mechanism, the filter mechanism is installed on exhaust pipe 20, the top of sealed box 3 is connected with top cover 4 through locking assembly 6, the contrast monitoring mechanism is installed on sealed box 3;
[0030] From Figure 1 , Figure 3 and Figure 5 It can be seen that the contrast monitoring mechanism includes bearing cylinder 9, clamping assembly 7 is symmetrically fixed on both ends of bearing cylinder 9, two clamping assemblies 7 are fixedly installed on the inner wall of sealed box 3, platinum wire 10 is threadedly wound on the outer wall of bearing cylinder 9, both ends of platinum wire 10 are electrically connected with first wire 11 and second wire 12 through blocking assembly 8 respectively, the other end of first wire 11 is electrically connected with controller 13, the other end of second wire 12 is electrically connected with resistor 14, resistor 14 is electrically connected with controller 13 through wire, controller 13 and resistor 14 are fixedly installed on the front side wall of sealed box 3, resistor 14 strain gauge is fixedly installed on the front side wall of sealed box 3, both terminals of resistor 14 strain gauge are installed on resistor 14.
[0031] From the above, the anesthetic gas is delivered to the infrared spectrum analyzer 2 through the gas delivery branch 1 for preliminary monitoring, the infrared spectrum analyzer 2 sends the gas into the sealed box 3 through the gas inlet pipe 5, the oxygen supply mechanism in the sealed box 3 continuously supplies oxygen into the sealed box 3 through the gas supply pipe, the platinum wire 10 acts as a catalyst to promote the oxidation reaction of the anesthetic gas in the sealed box 3, the heat generated causes the temperature of the platinum wire 10 to change, because the platinum wire 10 is in series with the resistor 14, the resistivity of the resistor 14 also changes in real time, the controller 13 provides current for the entire series circuit, the resistance strain gauge 15 monitors the resistance change of the resistor 14, and finally the resistance change calculates the concentration of the anesthetic gas, realizing accurate monitoring of the concentration of the anesthetic gas.
[0032] Specifically, with regard to the above, referring to Figure 2 , the oxygen supply mechanism includes an oxygen supply bottle 16, the output port of the oxygen supply bottle 16 is connected to the electromagnetic valve 18 through the gas supply pipe 17, the other connection port of the electromagnetic valve 18 is connected to the filter 19 through the gas supply pipe 17, and the other end of the filter 19 is connected to the sealed box 3 through the gas supply pipe 17.
[0033] From the above, the oxygen provided by the oxygen supply bottle 16 first reaches the electromagnetic valve 18 through the gas supply pipe 17, the electromagnetic valve 18 controls the on-off of the oxygen, the oxygen passing through the electromagnetic valve 18 continues to enter the filter 19 through the gas supply pipe 17, the filter 19 removes impurities and moisture in the oxygen, ensuring that the oxygen entering the sealed box 3 is pure, and finally the purified oxygen is delivered to the sealed box 3 through the gas supply pipe 17, ensuring the oxygen supply in the sealed box.
[0034] Specifically, with regard to the above, referring to Figure 2 and Figure 4 , the filter mechanism includes a filter box 21, a filter tank 22, and an exhaust valve 23, the filter box 21 is filled with activated carbon, the gas inlet of the filter box 21 is connected to the exhaust pipe 20, and the gas outlet is connected to the gas inlet of the filter tank 22, the filter tank 22 is filled with alkaline solution, the gas outlet of the filter tank 22 is connected to the exhaust pipe 20, and the exhaust valve 23 is installed at the tail of the exhaust pipe 20.
[0035] From the above, the exhaust gas first enters the filter box 21 through the exhaust pipe 20, the activated carbon in the filter box 21 adsorbs harmful substances and odors in the exhaust gas, the purified gas enters the filter tank 22 from the gas outlet of the filter box 21, the alkaline solution in the filter tank 22 neutralizes the acidic gas in the exhaust gas, the further purified gas enters the exhaust pipe 20 again from the gas outlet of the filter tank 22, and finally is discharged through the exhaust valve 23, the exhaust valve 23 controls the discharge of the exhaust gas, ensuring the efficiency and safety of the entire filtering process.
[0036] Referring to Figure 3 and Figure 5As shown, the cylinder body of the bearing cylinder 9 is uniformly provided with a plurality of air holes, and the two ends are provided with air vents, and the two air vents are respectively aligned with the air inlet pipe 5 and the air outlet pipe 20.
[0037] As can be seen from the above, the anesthetic gas enters the sealed box 3 through the air inlet pipe 5, enters the inside of the bearing cylinder 9 through the air vent at one end of the bearing cylinder 9, and the gas in the bearing cylinder 9 is in full contact with the platinum wire 10 through the uniformly distributed air holes, and the platinum wire 10 acts as a catalyst to promote the oxidation reaction of the gas. The reacted gas is discharged through the air vent at the other end of the bearing cylinder 9, and finally leaves the sealed box 3 through the air outlet pipe 20, ensuring that the gas is in full contact with the platinum wire 10 throughout the process, improving the reaction efficiency and monitoring accuracy.
[0038] Example two:
[0039] Reference Figure 5 and Figure 6 As shown, the clamping assembly 7 includes two fixed blocks 71 fixedly installed on the end sides of the bearing cylinder 9 and a limiting block 75 fixedly installed on the inner wall of the mounting box, the two fixed blocks 71 are symmetrically arranged, and the end sides of the opposite ends of the two fixed blocks 71 are provided with a movable slot and a moving port, the movable slot and the moving port are in communication with each other, a clamping block 72 is slidably arranged in the movable slot, a spring 73 is fixedly arranged between the clamping block 72 and the movable slot, and a push block 74 is slidably arranged in the moving port. The bottom end of the push block 74 is fixedly connected to the clamping block 72, and two clamping grooves matched with the clamping block 72 are symmetrically arranged on the limiting block 75, and the end portions of the two clamping blocks 72 are inserted into the clamping grooves.
[0040] As can be seen from the above, when the bearing cylinder 9 needs to be installed, the push block 74 is pushed inward, the clamping block 72 is compressed to retract into the movable slot, and then the bearing cylinder 9 is aligned with the clamping grooves on the limiting block 75. Loosen the push block 74, reset the spring 73, push the clamping block 72 into the clamping grooves of the limiting block 75, and realize the fixation of the bearing cylinder 9. When the bearing cylinder 9 needs to be disassembled, the push block 74 is pushed again, the clamping block 72 is retracted into the movable slot, and the bearing cylinder 9 can be easily taken out, ensuring that the installation and disassembly of the bearing cylinder 9 are convenient and fast, so as to complete the cleaning work of the platinum wire 10.
[0041] Reference Figure 5 As shown, the two blocking assemblies 8 each include a connecting terminal 81 and a quick connector 82, the two connecting terminals 81 are fixedly installed on the ports at the two ends of the platinum wire 10, the two quick connectors 82 are fixedly installed on the front side wall of the sealed box 3, the external interfaces are respectively connected to the first lead 11 and the second lead 12, and the connecting terminals 81 are inserted into the internal interfaces of the quick connectors 82.
[0042] As can be seen, when the platinum wire 10 needs to be installed, the connecting terminal 81 is inserted into the inner interface of the quick connector 82, so as to realize the electrical connection of the platinum wire 10 with the first wire 11 and the second wire 12, and vice versa, when the platinum wire 10 needs to be dismounted, the connecting terminal 81 is only pulled out from the inner interface of the quick connector 82, so as to quickly disconnect the connection of the platinum wire 10 with the wires, and ensure the convenient and quick installation and dismounting of the platinum wire 10.
[0043] Reference Figures 1-3 and Figure 7 As shown in Figs. 6 and 7, the locking assembly 6 is totally two, which are respectively located at the left and right sides of the top cover 4, the locking assembly 6 comprises a first lug 61 and a second lug 63, the first lug 61 is fixedly connected on the top cover 4, the second lug 63 is fixedly connected on the outer wall of the sealing box 3, and the first lug 61 is fixedly connected with the second lug 63 through a bolt 62.
[0044] As can be seen, when the top cover 4 needs to be opened, the bolt 62 is loosened, and the top cover 4 is lifted from the sealing box 3, so as to easily open the top cover 4, and ensure the convenient and quick opening and closing of the top cover 4.
[0045] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. Anesthetic gas concentration monitor, characterized in that, Include: Gas branch pipe (1), infrared spectrum analyzer (2) and sealed box (3), the gas branch pipe (1) is communicated infrared spectrum analyzer (2), the infrared spectrum analyzer (2) is communicated sealed box (3) through air inlet pipe (5), the right side wall of the sealed box (3) is communicated with exhaust pipe (20), the rear wall is communicated with oxygen supply mechanism, the filter mechanism is installed on the exhaust pipe (20), the top of the sealed box (3) is connected with top cover (4) through locking assembly (6), the sealed box (3) is installed with contrast monitoring mechanism; The contrast monitoring mechanism includes a bearing cylinder (9), the both ends of the bearing cylinder (9) are symmetrically fixed with clamping assemblies (7), the two clamping assemblies (7) are fixedly installed on the inner wall of the sealed box (3), the outer wall of the bearing cylinder (9) is threadedly wound with a platinum wire (10), the both ends of the platinum wire (10) are electrically connected with a first lead wire (11) and a second lead wire (12) through a barrier assembly (8) respectively, the other end of the first lead wire (11) is electrically connected with a controller (13), the other end of the second lead wire (12) is electrically connected with a resistor (14), the resistor (14) is electrically connected with the controller (13) through an electric wire, the controller (13) and the resistor (14) are fixedly installed on the front side wall of the sealed box (3), the resistor (14) strain gauge is fixedly installed on the front side wall of the sealed box (3), and the two terminals of the resistor (14) strain gauge are installed on the resistor (14).
2. An anaesthetic gas concentration monitor according to claim 1, characterised in that: The oxygen supply mechanism includes an oxygen cylinder (16), the output port of the oxygen cylinder (16) is communicated with a solenoid valve (18) through a gas supply pipe (17), the other connecting port of the solenoid valve (18) is communicated with a filter (19) through a gas supply pipe (17), and the other end of the filter (19) is communicated with the sealed box (3) through a gas supply pipe (17).
3. The anesthetic gas concentration monitor of claim 1, wherein: The filter mechanism includes a filter box (21), a filter tank (22) and an exhaust valve (23), the inside of the filter box (21) is filled with activated carbon, the air inlet of the filter box (21) is communicated with the exhaust pipe (20), and the air outlet is communicated with the air inlet of the filter tank (22), the inside of the filter tank (22) is provided with an alkaline solution, the air outlet of the filter tank (22) is communicated with the exhaust pipe (20), and the exhaust valve (23) is installed on the tail of the exhaust pipe (20).
4. The anesthetic gas concentration monitor of claim 1, wherein: The clamping assembly (7) includes two fixed blocks (71) fixedly installed on the end sides of the bearing cylinder (9) and a limiting block (75) fixedly installed on the inner wall of the mounting box, the two fixed blocks (71) are symmetrically arranged, the end sides of the opposite ends of the two fixed blocks (71) are provided with a movable groove and a moving port, the movable groove and the moving port are communicated with each other, a clamping block (72) is slidably arranged in the movable groove, a spring (73) is fixedly arranged between the clamping block (72) and the movable groove, a push block (74) is slidably arranged in the moving port, the bottom end of the push block (74) is fixedly connected with the clamping block (72), two clamping grooves matched with the clamping block (72) are symmetrically formed in the limiting block (75), and the end portions of the two clamping blocks (72) are inserted into the clamping grooves.
5. The anesthetic gas concentration monitor of claim 1, wherein: Two said barrier components (8) each include a connecting terminal (81) and a quick connector (82), two said connecting terminals (81) are respectively fixedly installed on the ports at both ends of the platinum wire (10), two said quick connectors (82) are each fixedly installed on the front side wall of the sealed box (3), the outer interfaces are respectively connected to the first lead wire (11) and the second lead wire (12), and the connecting terminal (81) is inserted on the inner interface of the quick connector (82).
6. The anesthetic gas concentration monitor of claim 1, wherein: The locking assembly (6) is shared by two, which are respectively located on the left and right sides of the top cover (4), the locking assembly (6) comprises a first lug (61) and a second lug (63), the first lug (61) is fixedly connected to the top cover (4), the second lug (63) is fixedly connected to the outer wall of the sealed box (3), and the first lug (61) is fixedly connected to the second lug (63) through the bolt (62).
7. The anesthetic gas concentration monitor of claim 1, wherein: A plurality of air holes are uniformly arranged on the barrel of the bearing cylinder (9), air inlets are arranged at both ends, and the two air inlets are respectively aligned with the air inlet pipe (5) and the air outlet pipe (20).