Insufflator with pressure stabilizing function and pressure stabilizing control method thereof

Abstract

The invention relates to an insufflator with a pressure stabilizing function. The insufflator comprises a pressure reducing module, a proportional valve, a control unit, an exhaust valve, a switchingvalve, a first pressure sensor and a second pressure sensor and further comprises a flow monitoring unit. The proportional valve, the switching valve and the exhaust valve are respectively connected to corresponding ports of the flow monitoring unit, and the flow monitoring unit is electrically connected to the control unit. The flow monitoring unit is adopted to monitor the actual pressure of thehuman abdominal cavity, then the actual pressure is sent to the control unit for processing, and the control unit controls opening and closing of the proportional valve or the exhaust valve accordingto comparison of the set abdominal pressure and the actual pressure of the abdominal cavity to achieve air injecting or exhausting correspondingly. A pressure stabilizing control method replaces thetechnical scheme in the prior art that a single pressure sensor is utilized to judge the air pressure of the surgical space, and overcomes the shortcoming in the prior art of the delay-time effect caused by the sensor and the proportional valve. The pressure error is small, the pressure control stability is good, and the method is favorable for the surgery made by a doctor.

Description

technical field [0001] The invention relates to an insufflation machine, in particular to an insufflation machine with a voltage stabilizing function and a voltage stabilizing control method thereof. Background technique [0002] During minimally invasive surgery, because the organs or other tissues of the human body are squeezed together, there is not enough space for observation and surgery. At this time, an insufflation machine is needed to provide air pressure to expand the inner cavity to provide a suitable surgical space. And the surgical field of view, the instability of air pressure will cause the displacement of soft tissues with the change of air pressure, which will affect the doctor's judgment on the precise position of the surgical site. Excessive air pressure will have a serious impact on some patients. The existing conventional insufflation machine has large air pressure fluctuations. Therefore, a higher air pressure is set to provide sufficient operation spac...

AI Technical Summary

Problems solved by technology

However, due to the delay effect of the sensor and the proportional valve, the air pressure error of this voltage stabilization control method is relatively large, and the stability of the air pressure control is also poor, which is inconvenient for doctors to operate.

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