Perfusion medium degassing device for hysteroscopic surgery

Abstract

The utility model is applicable to the technical field of medical instruments, and provides a perfusion medium degassing device for hysteroscopic surgery, a degassing device main body is internally provided with a tubular breathable film, the top of the degassing device main body is provided with a liquid inlet, the bottom of the degassing device main body is provided with a liquid outlet, and the side wall of the degassing device main body is provided with a vacuum device connector. The problems that in the hysteroscope operation, bubbles are generated by perfusion media, the operation view is affected, and air embolism is caused are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a perfusion medium degassing device for hysteroscopic surgery. Background Art

[0002] Hysteroscopy is a gynecological endoscope used for the diagnosis and treatment of uterine cavity and cervical lesions. During the operation, it is necessary to continuously infuse the medium (uterine distention fluid) to maintain the uterine cavity pressure. The hysteroscope is inserted into the uterine cavity under direct vision, and electroresection and electrocoagulation are performed according to the condition.

[0003] At present, the medium (uterine distension fluid) perfused during hysteroscopic surgery has not been degassed. Bubbles will be generated during electrocute or electrocoagulation during the operation, and the bubbles will affect the surgical field of view. In reality, the bubbles can only be broken or perfusion medium can be added to flush out the bubbles before the surgical operation can be continued, which invisibly prolongs the operation time and the patient's anesthesia time. Residual bubbles have the risk of inducing air embolism, increasing the corresponding surgical risks.

[0004] Henry's Law: Under certain temperature and equilibrium conditions, the solubility of a gas in a liquid is proportional to the equilibrium partial pressure of the gas. When the gas phase partial pressure drops to the extreme (vacuum state), the dissolved gas content in the liquid is also zero. Summary of the invention

[0005] The utility model provides a perfusion medium degassing device for hysteroscopic surgery, aiming to solve the problem that the bubbles generated in the previous hysteroscopic surgery affect the operation field of view, and the residual bubbles have the risk of inducing air embolism. The device is composed of a closed degassing cavity according to Henry's law, and the equilibrium pressure of the perfusion medium is reduced by a vacuum device, and the gas solubility in the perfusion medium is reduced. The gas is discharged through the vacuum device, and the tubular breathable membrane can expand the contact area of ​​the perfusion medium, improve the degassing efficiency and increase the flow rate.

[0006] The degassing device body is characterized in that the degassing device body comprises a sealed degassing cavity, the top of the degassing cavity is provided with a liquid inlet, the bottom is provided with a liquid outlet, the side wall is provided with a vacuum device connection port, a tubular breathable membrane is provided in the degassing device body, and the two ends of the tubular breathable membrane are respectively connected to the liquid inlet and the liquid outlet. The liquid inlet is connected to the perfusion medium.

[0007] Preferably, the tubular breathable membrane is a plurality of groups of tubular breathable membranes.

[0008] Preferably, the tubular breathable membrane is a hollow fiber membrane, through which liquid cannot pass but gas can pass.

[0009] The utility model has the following beneficial effects: 1. Compared with the prior art, the utility model has the following beneficial effects: the degassing device has no effect on the composition of the perfusion medium through low-pressure degassing, and adopts multiple groups of tubular breathable membranes to expand the contact area of ​​the perfusion medium, improve the degassing efficiency, and ensure that the flow rate and pressure of the perfusion medium meet the surgical requirements. 2. The degassed perfusion medium can reduce the interference of bubbles during the operation, shorten the operation time, and effectively reduce the risk of air embolism caused by air entering the patient's uterine cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cross-sectional view of the utility model.

[0011] Figure 2 It is a partial enlarged view of the breathable membrane of the utility model.

[0012] Figure 3 It is an implementation flow chart of the utility model.

[0013] Figure 1 Middle: 1. Degassing device body; 2. Liquid inlet; 3. Vacuum device connection port; 4. Liquid outlet; 5. Tubular breathable membrane.

[0014] Figure 3 In: 1. Degassing device body; 2. Liquid inlet; 3. Vacuum device connection port; 4. Liquid outlet; 5. Tubular breathable membrane; 6. Liquid inlet valve; 7. Liquid inlet pump; 8. Vacuum pump; 9. Vacuum gauge; 10. Gas-liquid separation device; 11. Liquid outlet valve.

[0015] Specific implementation method.

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and implementation examples. It should be understood that the specific implementation examples described here are only used to explain the utility model and are not used to limit the utility model.

[0017] See also Figure 1 A perfusion medium degassing device for hysteroscopic surgery, comprising a degassing device body (1), the top end of the degassing device body (1) being connected to a liquid inlet (2), the bottom end of the degassing device body (1) being connected to a liquid outlet (4), the interior of the degassing device body (1) being provided with a plurality of groups of tubular gas permeable membranes (5), one end of the tubular gas permeable membranes (5) being connected to the liquid inlet (2), and the other end being connected to the liquid outlet (4); and a vacuum device connection port (3) being provided on a side wall of the degassing device body (1).

[0018] For detailed steps, please refer to Figure 3Before the operation, the inlet valve (6) and the outlet valve (11) of the perfusion medium are opened, and the inlet pump (7) is started. The perfusion medium enters the tubular breathable membrane (5) through the inlet port (2) until the perfusion medium fills the degassing device. This can effectively remove the remaining air in the degassing device and prevent the hollow fiber from being damaged by high flow rate or pressure. The vacuum device (8) is started to make the pressure of the vacuum gauge (9) between (5kPa and 10kPa). Under low pressure, the gas in the perfusion medium overflows from the tubular breathable membrane (5), and the gas enters the gas-liquid separator (10) through the vacuum device connection port (3) and is discharged through the vacuum device. The degassed liquid enters the hysteroscopic instrument from the outlet port (4).

[0019] The above description is only an example of a preferred implementation of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A degassing device for perfusion medium for hysteroscopic surgery, comprising a degassing device body (1), characterized in that: The degassing device body (1) comprises a sealed degassing cavity, the top of the degassing cavity is provided with a liquid inlet (2), the bottom is provided with a liquid outlet (4), and the side wall is provided with a vacuum device connection port (3); A tubular air-permeable membrane (5) is provided inside the degassing device body (1), and two ends of the tubular air-permeable membrane (5) are respectively connected to the liquid inlet (2) and the liquid outlet (4).

2. A degassing device for perfusion medium for hysteroscopic surgery according to claim 1, characterized in that: A plurality of groups of tubular air-permeable membranes (5) are arranged inside the degassing device body (1), and the tubular air-permeable membranes (5) are hollow fiber membranes.

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