Multi-angle carbon dioxide gas blowing pipe

Abstract

The present application relates to carbon dioxide gas blowing pipe technical field, especially to a kind of multi-angle carbon dioxide gas blowing pipe, including gas supply pipe and water supply pipe, the outside of water supply pipe is equipped with handle, the throat pipe portion is formed on the gas supply pipe, the output end of water supply pipe is communicated with the throat pipe portion of gas supply pipe, the output end of gas supply pipe is provided with fog pipe, the number of fog pipe is at least two, and at least two fog pipe can be adjusted fog direction by bending, to adapt to the surface shape of heart to carry out comprehensive atomization wetting to heart surface, it is realized that heart is atomized wetting by setting at least two fog pipe, the angle of blowing pipe does not need to be frequently adjusted, at least two fog pipe can be accurately temperature regulated by setting heating wire and temperature sensor, at least two fog pipe can avoid some dead angle position unable to wet by adjusting different fogging speed.

Description

Technical Field

[0001] This invention relates to the field of carbon dioxide gas blowing pipe technology, and in particular to a multi-angle carbon dioxide gas blowing pipe. Background Technology

[0002] During coronary artery bypass surgery, the chest cavity is open, exposing the heart to the atmosphere. This can lead to two problems: first, moisture on the heart's surface evaporates; second, air can enter the heart through the incision during surgery. Since air is a mixture of gases, gases like nitrogen, which cannot diffuse quickly in the body, can easily enter the blood vessels through the incision. If a large amount of air enters the heart during surgery, it can cause myocardial ischemia, arrhythmia, and ventricular fibrillation after the operation. Even more dangerous is if the air travels through the blood vessels to the brain, causing cerebral embolism. Therefore, carbon dioxide is often used to humidify the heart during surgery to prevent air from entering. Carbon dioxide is heavier and settles in the lower part of the heart, expelling air from the vicinity. Furthermore, carbon dioxide diffuses very quickly in the blood, several times faster than oxygen, and the body also produces carbon dioxide, so its use does not cause any harm. Therefore, in coronary artery bypass surgery, a mixture of carbon dioxide and saline solution is often used to humidify the heart.

[0003] In existing coronary artery bypass surgery, the carbon dioxide nebulizer used includes a water supply pipe and an air supply pipe. Water from the water supply pipe enters the interior of the air supply pipe and is then dispersed by gas to form a mist, which is then blown out from the nebulizer. Medical staff aim the output end of the nebulizer at the heart to wet the surface of the heart.

[0004] The shortcomings of the existing technology are as follows: First, since the surface of the heart is roughly curved, if the existing nebulizer is to fully wet the exposed surface of the heart, the angle of the nebulizer needs to be adjusted continuously to achieve the effect of full wettability. In the current cardiac surgery process, the medical staff holding the nebulizer frequently adjusts the angle of the nebulizer to achieve full wettability of the heart, which can easily affect the attending physician's attention and affect the progress of the surgery.

[0005] Secondly, although the existing carbon dioxide blowing tubes are equipped with temperature control devices, the temperature control devices do not control the temperature accurately, which can easily lead to a lower temperature on the surface of the heart.

[0006] Thirdly, because the surface of the heart is not smooth, blowing mist in a specific direction can easily lead to some dead corners that cannot be moistened. Summary of the Invention

[0007] This invention provides an improved carbon dioxide gas nebulizer for cardiac bypass surgery. By setting at least two nebulizer tubes, it can achieve multi-angle atomization and wetting of the heart without frequent adjustment of the nebulizer tube angle. The at least two nebulizer tubes can be equipped with heating wires and temperature sensors for precise temperature regulation. By adjusting the different nebulization speeds of the at least two nebulizer tubes, it can avoid some dead corners that cannot be wetted.

[0008] The technical problem solved by this invention is achieved by the following technical solution:

[0009] A multi-angle carbon dioxide gas misting pipe includes an air supply pipe and a water supply pipe. The water supply pipe is fitted with a handle. The air supply pipe has a throat. The output end of the water supply pipe is connected to the throat of the air supply pipe. The output end of the air supply pipe is provided with a mist outlet pipe. The number of mist outlet pipes is at least two, and the mist outlet pipes can be adjusted by bending to adjust the mist outlet direction to adapt to the surface shape of the heart and to fully atomize and wet the surface of the heart.

[0010] Preferably, it also includes a controller, and each of the input ends of at least two of the mist outlet pipes is provided with a flow rate regulating valve. The controller controls the flow direction of the mist flow after the collision of the mist flow from the at least two mist outlet pipes by controlling the at least two flow rate regulating valves.

[0011] Preferably, at least two of the mist outlet pipes are further provided with heating wires controlled by a controller, and at least two of the mist outlet pipes are provided with temperature sensors at their output ends. The output ends of the temperature sensors are connected to the input ends of the controller to provide temperature signals to the controller. The output ends of the controller output control signals to control the operation of the heating wires.

[0012] Preferably, the heating wire and the temperature sensor are spaced apart.

[0013] Preferably, the water supply pipe is also equipped with a water inlet regulating valve, and the air supply pipe is equipped with an air inlet regulating valve.

[0014] Preferably, the throat portion is covered by a handle.

[0015] Preferably, the flow rate regulating valves at the input ends of at least two of the mist outlet pipes are controlled manually.

[0016] Preferably, the output end of the water supply pipe is connected to the throat of the air supply pipe via an atomizing nozzle.

[0017] The beneficial effects of this invention are: by setting at least two mist outlet tubes, it is possible to simultaneously mist and humidify the side of the heart away from the blood vessels and the side closer to the blood vessels from different angles, fully ensuring the comprehensiveness of heart humidification and avoiding frequent changes in the angle of the mist outlet tubes, which would affect the attending physician's attention.

[0018] By setting up a controller, heating wire, and temperature sensor, the temperature of the atomization can be controlled in real time to ensure that the heart temperature does not drop too low.

[0019] By controlling the flow rate regulating valves on at least two mist outlet pipes, the flow direction of the mist after the collision of the mist from at least two mist outlet pipes can be controlled, thus avoiding dead zones on the surface of the heart that cannot be wetted. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the prior art of the present invention:

[0022] Figure 2 For the present invention Figure 1 A sectional view;

[0023] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A;

[0024] Figure 4 This is a schematic diagram of the first state structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B;

[0026] Figure 6 This is a structural schematic diagram of the second state of the present invention from a first perspective;

[0027] Figure 7 This is a structural schematic diagram of the second state and second perspective of the present invention;

[0028] Figure 8 This is a front view of the second state of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the mist outlet tube of the present invention;

[0030] Figure 10 This is a block diagram illustrating the principle of mist flow temperature control in this invention.

[0031] Figure 11 This is a schematic diagram illustrating that at least two mist outlet pipes of the present invention have equal flow velocities;

[0032] Figure 12 This is a schematic diagram of the structure of the present invention, showing that at least two mist outlet pipes have unequal flow velocities.

[0033] Figure 13 This is a schematic diagram of the plane coordinate system showing the velocity variation of the two mist outlets of the present invention over time. Figure 1 ;

[0034] Figure 14 This is a schematic diagram of the plane coordinate system showing the velocity variation of the two mist outlets of the present invention over time. Figure 2 .

[0035] In the diagram, 1 is the air supply pipe; 101 is the throat section; 2 is the water supply pipe; 201 is the atomizing nozzle; 3 is the handle; 4 is the mist outlet pipe; 5 is the first mist outlet pipe body; 6 is the second mist outlet pipe body; 7 is the flow rate regulating valve; 8 is the controller; 9 is the temperature sensor; 10 is the heating wire; 11 is the heart; 1101 is the first side wall; 1102 is the second side wall; 12 is the blood vessel; 13 is the air intake regulating valve; and 14 is the water intake regulating valve. Detailed Implementation

[0036] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0037] refer to Figures 1-3 The structure of the prior art carbon dioxide blowing pipe of the present invention is described, with reference to Figure 1 The existing carbon dioxide misting pipe mainly consists of three parts: first, the air supply pipe 1 for carbon dioxide delivery; second, the water supply pipe 2 for saline delivery; and third, the mist outlet pipe 4 located at the output end of the air supply pipe 1. (Refer to...) Figure 2 and Figure 3 The air supply pipe 1 has a throat section 101, and the output end of the water supply pipe 2 is connected to the throat section 101 of the air supply pipe 1. According to the Venturi effect, when the carbon dioxide mist from the air supply pipe 1 passes through the throat section 101, it will accelerate, and the pressure will drop sharply, adsorbing the droplets from the water supply pipe 2. The saline solution discharged from the output end of the water supply pipe 2 will be dispersed by the accelerated mist to form a mist, thus achieving the mixing of carbon dioxide and saline solution into a mist. The mixed mist is discharged from the mist outlet pipe 4 at the output end of the air supply pipe 1, achieving surface wetting of the heart 11. In order to ensure the atomization effect of the saline solution, the output end of part of the water supply pipe 2 of the carbon dioxide misting pipe is also connected to the throat section 101 with an atomizing nozzle 201, thus achieving multi-stage atomization. That is, the saline solution entering the throat section 101 is first atomized by the atomizing nozzle 201, and then further dispersed by the high-speed carbon dioxide mist for secondary atomization. Figures 1-3As can be seen from the structural diagram, in order to facilitate medical personnel to hold the carbon dioxide nebulizer, a handle 3 is also provided on the outside of the air supply tube 1. Since the diameter of the trachea 101 is small and easily broken, the handle 3 is preferably located at the trachea 101 to protect the trachea 101. At the same time, the handle 3 can also ensure the stability of the connection between the air supply tube 1 and the trachea 101. In order to facilitate the adjustment of the supply of carbon dioxide and saline, a water inlet regulating valve 14 is also provided on the water supply tube 2, and an air inlet regulating valve 13 is also provided on the air supply tube 1, thereby controlling the proportion of saline in the carbon dioxide discharged from the nebulizer tube 4. The above is a description of the prior art of the present invention. From the above content, it can be seen that the existing carbon dioxide nebulizer has the following shortcomings.

[0038] Firstly, because there is only one mist outlet pipe 4, the mist outlet angle is limited. Figure 1 Taking the side of the heart 11 opposite to the side connected to the blood vessel 12 as an example, the mist emitted from the mist outlet 4 blows onto the side of the heart 11 opposite to the side connected to the blood vessel 12. After the mist comes into contact with the heart 11, it is difficult to wet the side connected to the blood vessel 12 due to the curvature of the heart 11 surface. Therefore, the spray angle of the mist outlet 4 must be frequently adjusted to ensure that the surface of the heart 11 is fully wetted. However, frequent adjustment of the angle of the mist outlet 4 can easily distract the attending physician from the surgical procedure on the heart 11. Secondly, since the heart 11 needs to maintain its temperature during surgery, the temperature regulation device of conventional carbon dioxide mist outlets is mostly adjusted before the input end of the mist outlet 4. One method involves mixing carbon dioxide at a certain temperature with physiological saline at a certain temperature to form a mist at the target temperature, which is then discharged from the mist outlet pipe 4. Another method involves heating the mixed mist before discharging it from the mist outlet pipe 4. However, both methods involve temperature regulation before the mist outlet pipe 4, and the mist gradually cools down as it is discharged from the mist outlet pipe 4. This is called temperature loss, and the magnitude of temperature loss is directly related to the flow rate and the ambient air temperature. This leads to inaccurate temperature regulation of the mist. Thirdly, since the surface of the heart 11 is not completely smooth and is uneven at the microscopic level, when the mist outlet pipe 4 wets the surface of the heart 11 at a specific spray mist angle, there are often dead zones that cannot be fully wetted.

[0039] Based on the above, refer to Figures 4-8This invention provides a multi-angle carbon dioxide gas misting pipe to address the shortcomings of existing technologies. The main improvement lies in the inclusion of multiple misting pipes 4, each capable of bending to change its misting angle and adapt to the curved shape of the heart 11 surface. This allows for comprehensive atomization and wetting of the heart 11 surface, solving the problem of frequent adjustments to the misting angle required for proper wetting. Specifically, the misting pipes 4 can be made of a material that can change shape under external force and maintain its shape after the force is removed, such as a common metal flexible tube. Figure 4 This shows the state of the mist outlet pipe 4 when it is in its normal, unbent condition. Figure 6 The two mist outlet pipes 4 bend under external force, thus adjusting the mist outlet angle. For details, please refer to [reference needed]. Figure 8 Two mist outlets 4 wet the surface of the heart 11 from different angles. These two mist outlets 4 are respectively named the first mist outlet body 5 and the second mist outlet body 6. Figure 1 The mist jets from the first mist outlet 5 and the second mist outlet 6 can not only wet the side away from the heart 11 connected to the blood vessel 12, but also wet the side of the heart 11 connected to the blood vessel 12. Figure 8 Compared to the design of the first mist outlet body 5 and the second mist outlet body 6 Figure 1 The design with only one mist outlet 4 can more comprehensively wet the surface of the heart 11. Although the attached drawings illustrate the number of two mist outlets 4, those skilled in the art can easily imagine that other numbers of mist outlets 4 are also applicable to the technical solution of the present invention to solve the problem of needing to frequently adjust the angle of the mist outlet 4 in order to fully wet the surface of the heart 11.

[0040] To address the issue of precisely controlling the temperature of the mist flow during cardiac surgery (as described above), the following references are provided. Figure 9 This invention heats the mist stream by installing a heating wire 10 inside the mist outlet pipe 4, and monitors the temperature of the mist stream by installing a temperature sensor 9 at the output end of the mist outlet pipe 4. Since the temperature adjustment process is carried out within the mist outlet pipe 4, the mist stream sprayed from the mist outlet pipe 4 directly adheres to the heart 11, resulting in minimal temperature loss and more precise temperature control. For details, please refer to... Figure 7 and Figure 10The carbon dioxide blowing pipe also includes a controller 8. The controller 8 controls the heating wire 10 inside the mist outlet pipe 4 to work by receiving the temperature signal monitored by the temperature sensor 9. That is, when the temperature inside the mist outlet pipe 4 is low, the controller 8 increases the heating power of the heating wire 10 to raise the temperature of the mist flow. When the temperature inside the mist outlet pipe 4 is high, the controller 8 decreases the power of the heating wire 10 to lower the temperature of the mist flow discharged from the mist outlet pipe 4.

[0041] To address the issue of insufficient wetting in certain areas due to the uneven surface of the heart 11, refer to... Figure 7 , Figure 8 , Figure 11 and Figure 12 Specifically, for ease of explanation, this example will still use two mist outlet pipes 4. A flow rate regulating valve 7 is installed at the input end of each of the two mist outlet pipes 4. The controller 8 controls the flow rate of the mist flow by controlling the flow rate regulating valves 7 of the two mist outlet pipes 4, thereby changing the flow direction after the mist flows from the two mist outlet pipes 4 collide. Figure 11 Taking an example, suppose there is a depression on the side opposite to the heart 11 and the blood vessel 12. The depression has a first sidewall 1101 opposite to the first mist outlet body 5 and a second sidewall 1102 opposite to the first mist outlet body 5. Figure 11 In this process, because the flow velocities of the first mist outlet 5 and the second mist outlet 6 are equal, only the mist sprayed from the first mist outlet 5 can wet the depression. Furthermore, the mist sprayed from the first mist outlet 5 can directly act on the first sidewall 1101. However, because the angle between the second sidewall 1102 and the mist sprayed from the first mist outlet 5 is opposite, the mist sprayed from the first mist outlet 5 is limited by the angle and cannot fully act on the second sidewall 1102, thus forming a dead zone area that cannot be fully wetted. Based on this, the controller 8 adjusts the flow rate regulating valve 7 on the second mist outlet 6 and / or the flow rate regulating valve 7 on the first mist outlet 5, so that the speed of the mist sprayed from the second mist outlet 6 is greater than the speed of the mist sprayed from the first mist outlet 5, thereby forming... Figure 12 In this schematic diagram, after the mist streams from the first mist outlet 5 and the second mist outlet 6 collide, the mist stream from the second mist outlet 6, due to its higher velocity, can reach the recessed area and wet the second sidewall 1102. This avoids the problem of insufficient wetting in dead zones due to the irregular surface shape of the heart 11. More specifically, the controller 8 controls the flow direction of the mist streams from at least two mist outlets 4 after collision by controlling at least two flow rate regulating valves 7. This can be achieved in the following three ways, see reference. Figure 13 Firstly, under the control of the controller 8, the flow rate regulating valve 7 on the first mist outlet pipe 5 ensures that the speed of the sprayed mist remains constant, and its speed is within... Figure 13S2 represents the velocity variation of the flow rate regulating valve 7 on the second mist outlet pipe 6 within a period, and S1 represents the velocity variation curve. Secondly, under the control of the controller 8, the flow rate regulating valve 7 on the second mist outlet pipe 6 maintains a constant mist velocity. Figure 13 In the diagram, the mist velocity of the second mist outlet tube 6 is represented by S2, while the controller 8 controls the flow rate regulating valve 7 on the first mist outlet tube 5 to change linearly within a period, and the mist velocity ejected from the first mist outlet tube 5 is represented by S1. (Refer to...) Figure 14 Thirdly, the controller 8 simultaneously controls both the first mist outlet 5 and the second mist outlet 6 to undergo linear changes, so that the direction of the mist streams ejected from the first mist outlet 5 and the second mist outlet 6 changes immediately after being impacted. The velocities of the mist streams ejected from the first mist outlet 5 and the second mist outlet 6 are represented by S1 and S2, respectively. It should be further noted that although... Figure 13 and Figure 14 The control speed change process is represented by a linear change using a straight line. However, in practice, the controller 8 can also control the speed change through periodic curved speed changes, such as sinusoidal curve changes. Obviously, by controlling the flow rate regulating valves 7 on the first mist outlet 5 and the second mist outlet 6, the mist streams sprayed from the first mist outlet 5 and the second mist outlet 6 can form different angles after impact to wet the surface of the heart 11, avoiding the problem of dead zones on the surface of the heart 11 that cannot be wetted due to unevenness. At the same time, due to the mutual collision between the mist streams, Figure 12 For example, the side of the heart 11 connected to the blood vessel 12 is the right side, and the side not connected to the blood vessel 12 is the left side. The direction of the mist flow after the impact can not only change the angle from left to right, but also easily disperse in the front-back direction after the two mist flows collide. The dispersion of the mist flow in the front-back direction is more complete, which can form a larger coverage area and better prevent the atmosphere from entering the heart 11. Although the above-mentioned solution of the present invention uses the controller 8 to control the flow rate regulating valve 7 on the two mist outlet pipes 4 to control the mist flow speed, in actual process, the flow rate regulating valve 7 on the two mist outlet pipes 4 can also be set as a flow rate regulating valve 7 that can be adjusted and controlled by hand, which can also achieve the above effect. However, it is obviously more troublesome to adjust manually, so it is preferable to use the controller 8 to control the flow rate regulating valve 7.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A multi-angle carbon dioxide gas atomizing pipe, comprising an air supply pipe (1) for conveying carbon dioxide and a water supply pipe (2) for conveying saline solution, wherein the air supply pipe (1) has a throat section (101) for atomizing carbon dioxide and saline solution, the output end of the water supply pipe (2) is connected to the throat section (101) of the air supply pipe (1) for providing saline solution to the throat section (101), and the output end of the air supply pipe (1) is provided with a mist outlet pipe (4), characterized in that, The number of the mist outlet pipes (4) is at least two, and the mist outlet pipes (4) can be adjusted by bending to adapt to the surface shape of the heart (11) to meet the requirement of fully atomizing and wetting the surface of the heart (11). The system also includes a controller (8), and the input ends of the at least two mist outlet pipes (4) are provided with flow rate regulating valves (7). The controller (8) controls the flow direction of the mist flow after the collision of the at least two mist outlet pipes (4) by controlling the at least two flow rate regulating valves (7).

2. The multi-angle carbon dioxide gas misting pipe according to claim 1, characterized in that, At least two of the mist outlet pipes (4) are also provided with heating wires (10) controlled by controller (8). Temperature sensors (9) are provided at the output end of at least two of the mist outlet pipes (4). The output end of the temperature sensor (9) is connected to the input end of the controller (8) to provide a temperature signal to the controller (8). The output end of the controller (8) outputs a control signal, which is used to control the operation of the heating wires (10).

3. A multi-angle carbon dioxide gas misting pipe according to claim 2, characterized in that, The heating wire (10) and the temperature sensor (9) are spaced apart.

4. A multi-angle carbon dioxide gas misting pipe according to claim 1, characterized in that, The water supply pipe (2) is also equipped with a water inlet regulating valve (14), and the air supply pipe (1) is equipped with an air inlet regulating valve (13).

5. A multi-angle carbon dioxide gas misting pipe according to claim 1, characterized in that, The throat section (101) is covered by the handle (3).

6. A multi-angle carbon dioxide gas misting pipe according to claim 1, characterized in that, The flow rate regulating valves (7) at the input ends of at least two of the mist outlet pipes (4) are controlled manually.

7. A multi-angle carbon dioxide gas misting pipe according to claim 1, characterized in that, The output end of the water supply pipe (2) is connected to the throat section (101) of the air supply pipe (1) through the atomizing nozzle (201).

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