Air pressure measuring device of pneumoperitoneum machine

Abstract

The utility model discloses an air pressure measuring device of a pneumoperitoneum machine, and belongs to the technical field of medical surgical instruments. The defects that in the prior art, a traditional air pressure measuring device is low in air pressure measuring precision, and accuracy is difficult to guarantee are overcome. The main body structure comprises a box body, an air bin and a water bin are arranged in the box body, the top of the air bin is sealed through a partition plate, the partition plate is provided with an air pipe quick connector used for being communicated with the interior of the air bin, the bottom of the air bin is communicated with the water bin, and the side wall of the air bin is provided with an air bin graduated scale used for observing the air volume and the air pressure value. The device is mainly used for measuring the volume and the pressure of the gas output by the medical CO2 pneumoperitoneum machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical surgical instruments, and in particular relates to an air pressure measuring device for an insufflator. Background Art

[0002] Medical CO2 insufflator is a device used to establish and maintain pneumoperitoneum during laparoscopic surgery. It can infuse medical CO2 gas into the abdominal cavity, separate the abdominal wall from the abdominal organs with gas, and form a space for surgical operation and vision. The accuracy of the output air pressure is one of its most critical technical indicators, and the air pressure measuring device of the insufflator is a key measuring instrument for measuring the accuracy of the output air pressure of the insufflator.

[0003] The traditional pneumoperitoneum machine air pressure measurement device uses an air bag, injects gas into the air bag, then measures the air bag volume, and finally converts the air pressure through the formula (PV=nRT). However, due to the irregular shape of the air bag, the measured volume is not accurate; in addition, due to the different amounts of injected gas, the additional pressure generated by the expansion of the air bag itself will change, resulting in a large deviation from the actual air pressure. Therefore, the air pressure measurement precision is low and the accuracy is difficult to guarantee. In addition, the air bag is easy to deteriorate, easy to damage, has poor sealing reliability, and is difficult to measure.

[0004] In addition, the more common measuring device of the pneumoperitoneum machine uses a water tank. The gas is injected into the sealed water tank through the air inlet, and the water outlet at the other end of the water tank collects the displacement through a container, and then the gas volume and air pressure are converted through a formula. Although the water tank overcomes the problems of irregular shape of the airbag, additional pressure changes, and easy deterioration and damage, it improves the measurement accuracy. However, since each data is measured, it is necessary to collect, measure, and add water. The process is relatively cumbersome. When the measured data is large, the measurement efficiency is very low. In addition, the entire process of collecting, measuring, and adding water is manually operated. Affected by human factors, the measurement accuracy and stability are difficult to guarantee. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an air pressure measuring device for an insufflator.

[0006] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0007] A gas pressure measuring device for an insufflator comprises a box body, wherein an air chamber and a water chamber are arranged inside the box body, the top of the gas chamber is sealed by a partition, and a trachea quick connector for connecting with the inside of the gas chamber is arranged on the partition, the bottom of the gas chamber is connected with the water chamber, and a gas chamber scale for observing gas volume and air pressure value is arranged on the side wall of the gas chamber.

[0008] Preferably, an outer side wall of the water tank is provided with a water inlet switch for letting water into the water tank and a drain switch for draining water from the water tank.

[0009] Preferably, the tracheal quick connector includes an air inlet for connecting to an insufflator, an air outlet for exhausting air, and a test port for connecting to a pressure gauge.

[0010] Preferably, the box is made of transparent material.

[0011] Preferably, a water tank dust cover is provided on the top of the water tank, and air holes are provided on the side walls of the water tank.

[0012] Preferably, at least one reinforcing rib is arranged inside the box.

[0013] Preferably, the water inlet switch and the drain switch are recessed inwardly into the box.

[0014] Preferably, the height of the top of the gas bin is less than the height of the water bin, and the volume of the gas bin is less than the remaining volume of the water bin when the water bin is filled with water to the water level at which the water inlet switch shuts off the water.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The water inlet switch is located at the top of the water tank, which is used for water filling before measurement. The water inlet switch is equipped with an automatic water level control valve, which automatically shuts down when the water reaches the set water level and automatically starts to replenish water when there is a lack of water, making the operation more convenient and automated; the drain switch is located at the bottom of the water tank, which is used for drainage after the measurement.

[0017] 2. The water inlet switch and the drain switch are recessed inwards into the box, so as to protect the switches from being touched or damaged, saving space, being more beautiful, safe and reliable;

[0018] 3. The water tank dust cover can prevent dust and debris from falling from the top to pollute the water, and the air hole can ensure that the air pressure in the water tank is consistent with the external environment pressure;

[0019] 4. The water tank and air tank are made of transparent material, which is not only strong and durable, but also clearer and more intuitive;

[0020] To sum up, the utility model adopts a transparent box, which is not only sturdy and durable, but also clearer and more intuitive; there is no need for tedious operations such as water collection, measurement, and water replenishment, which eliminates the influence of human factors; and the measurement data is directly read without the need for formula conversion. Therefore, the measurement operation is simpler, the measurement accuracy is higher, and the stability is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the utility model when viewed from above.

[0024] In the figure: 1. Air tank; 2. Water tank dust cover; 3. Water tank; 4. Reinforcing ribs; 5. Air tank scale; 6. Air pipe quick connector; 61. Air inlet; 62. Air outlet; 63. Test port; 7. Water inlet switch; 8. Drain switch; 9. Air hole; 10. Box body; 11. Partition. DETAILED DESCRIPTION

[0025] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0026] Embodiment 1:

[0027] like Figure 1-2 As shown, an air pressure measuring device of an insufflator includes a box body 10, wherein an air chamber 1 and a water chamber 3 are arranged inside the box body 10, the top of the air chamber 1 is sealed by a partition 11, and a trachea quick connector 6 for connecting with the inside of the air chamber 1 is arranged on the partition 11, the bottom of the air chamber 1 is connected with the water chamber 3, and an air chamber scale 5 for observing the gas volume and air pressure value is arranged on the side wall of the air chamber 1, and the values ​​on both sides of the scale line represent the converted gas volume and air pressure value (L and mmHg) respectively.

[0028] In this embodiment, the volume design of the gas chamber 1 should be sufficient to withstand the displacement of the gas pressure measurement value of >15 mmHg (the standard measurement pressure value of the medical pneumoperitoneum machine), and the corresponding gas volume value = the gas pressure measurement value × the gas chamber volume of the smallest scale unit;

[0029] The outer wall of the gas bin 1 is provided with a gas bin scale 5 for air pressure and gas volume, and the minimum scale of air pressure (measurement accuracy) is ≥ 1mmHg. The measured value can be directly read according to the water level without the need for public conversion, which is simpler and faster;

[0030] The height of the top of the air tank 1 (0 water level) is less than the height of the water tank 3, and the volume of the air tank 1 is less than the remaining volume of the water tank 3 when the water tank 3 is filled with water to the set automatic shut-off water level, thereby ensuring that when all the water in the air tank 1 is discharged into the water tank 3, the water in the water tank 3 will not overflow.

[0031] Embodiment 2:

[0032] A pressure measuring device for an insufflator, which differs from Example 1 in that an inlet switch 7 for letting water into the water tank 3 and a drain switch 8 for draining water from the water tank 3 are provided on the outer wall of the water tank 3, wherein the inlet switch 7 is located at the top of the water tank 3 and is used for filling water before measurement, and the inlet switch 7 is provided with an automatic water level control valve, which automatically shuts down after the water reaches the set water level and automatically starts to replenish water after water shortage, so that the operation is more convenient and automated; the drain switch 8 is located at the bottom of the water tank 3 and is used for drainage after the measurement is completed; the inlet switch 7 and the drain switch 8 are designed to be recessed inwardly into the box body 10, so as to protect the switches from being easily touched and damaged, and also save space, be more beautiful, safe and reliable.

[0033] like Figure 3 As shown, the trachea quick connector 6 includes an air inlet 61 for connecting to an insufflator, an air outlet 62 for exhausting air, and a test port 63 for connecting to a pressure gauge, wherein the air inlet 61, the air outlet 62 and the test port 63 are provided with quick connectors, making the trachea plug-in connection more convenient and quick.

[0034] Furthermore, the box body 10 is made of transparent material, and the water tank 3 and the air tank 1 in the utility model are made of transparent acrylic material, which is not only strong and durable, but also clearer and more intuitive.

[0035] Furthermore, a water tank dust cover 2 is provided on the top of the water tank 3, and an air hole 9 is provided on the side wall of the water tank 3; specifically, the water tank dust cover 2 can prevent dust and debris from falling from the top to pollute the water, and the air hole 9 ensures that the air pressure in the water tank 3 is consistent with the external environmental pressure.

[0036] Furthermore, more than one reinforcing rib 4 is provided inside the box body 10. Specifically, the acrylic joints of the water tank 3, the air tank 1, the water inlet switch 7, the drain switch 8, the water tank dust cover 2 and other positions are provided with corner guards and reinforcing ribs 4, which are sturdy and durable.

[0037] The working principle of the utility model is:

[0038] When in use, first connect the water inlet switch 7 on the air pressure measuring device of the insufflator to the external water pipe, connect the air inlet 61 to the insufflator through the air pipe, open the air valve switch of the air outlet 62, and then add water to the water tank 3 to the set water level, and the water filling is automatically shut down. Since the air tank 1 is connected to the water tank 3 at the bottom, the air tank 1 is also filled with water and the gas is emptied (the water level scale value is 0); finally, close the air valve switch of the air outlet 62, start the insufflator, and the insufflator injects CO2 gas into the air tank 1 according to the set air pressure parameters. As the air pressure increases, the water discharge of the air tank 1 also increases. When the air pressure of the air tank 1 is consistent with the air pressure output by the insufflator, the air tank 1 stops draining. At this time, read the water level scale on the side of the air tank 1, which is the actual measured air pressure value (mmHg) and volume (L); after the measurement, if the air pressure measuring device of the insufflator is no longer used in a short period of time, all the water can be discharged through the drainage switch 8.

Claims

1. A device for measuring air pressure of an insufflator, comprising a housing (10), characterized in that: The box body (10) is provided with an air bin (1) and a water bin (3) inside. The top of the air bin (1) is sealed by a partition (11), and a gas pipe quick connector (6) for connecting with the inside of the air bin (1) is provided on the partition (11). The bottom of the air bin (1) is connected with the water bin (3). A gas bin scale (5) for observing gas volume and air pressure value is provided on the side wall of the air bin (1).

2. The air pressure measuring device of the pneumoperitoneum machine according to claim 1, characterized in that: The outer side wall of the water tank (3) is provided with a water inlet switch (7) for letting water into the water tank (3) and a water discharge switch (8) for discharging water from the water tank (3).

3. The air pressure measuring device of the pneumoperitoneum machine according to claim 2, characterized in that: The tracheal quick connector (6) comprises an air inlet (61) for connecting to an insufflator, an air outlet (62) for exhausting air, and a test port (63) for connecting to a pressure gauge.

4. The air pressure measuring device of the pneumoperitoneum machine according to any one of claims 1 to 3, characterized in that: The box body (10) is made of transparent material.

5. The air pressure measuring device of the pneumoperitoneum machine according to any one of claims 1 to 3, characterized in that: A water tank dust cover (2) is provided on the top of the water tank (3), and an air hole (9) is provided on the side wall of the water tank (3).

6. The air pressure measuring device of the pneumoperitoneum machine according to any one of claims 1 to 3, characterized in that: One or more reinforcing ribs (4) are arranged inside the box body (10).

7. The air pressure measuring device of the pneumoperitoneum machine according to claim 2 or 3, characterized in that: The water inlet switch (7) and the water discharge switch (8) are recessed inwardly into the box body (10).

8. The air pressure measuring device of the pneumoperitoneum machine according to claim 2 or 3, characterized in that: The height of the top of the air tank (1) is less than the height of the water tank (3), and the volume of the air tank (1) is less than the remaining volume of the water tank (3) when the water tank (3) is filled with water to the water level at which the water inlet switch (7) shuts off the water.

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