Respiration amplitude control mask capable of controlling tidal volume

Abstract

A breathing amplitude control mask capable of controlling tidal volume comprises a fixed mask body, a breathing pipeline adheres to the middle of the fixed mask body, an air inlet pipeline and an air outlet pipeline are fixedly connected to the two ends of the breathing pipeline respectively, an electromagnetic valve is installed at the end, away from the breathing pipeline, of the air inlet pipeline, and a gas flow sensor is installed at the end, close to the electromagnetic valve, of the air inlet pipeline. A flow control displayer is adhered to the end, away from the electromagnetic valve, of the gas flow sensor, the flow control displayer is used for adjusting the breathing tidal volume value, and the position of the end diaphragm muscle of each time of breathing is fixed by fixing the tidal volume of a patient; a doctor can determine the time node of the inspiration end or expiration end as positioning scanning and puncture operation in advance according to the position of the focus; for the same patient, the optimal puncture path can be obtained by properly adjusting the tidal volume; the face of a patient is protected through the protection pad, pressure sores caused by long-term wearing are prevented, and meanwhile leakage of gas in the device is reduced through the protection pad.

Description

technical field [0001] The invention relates to a device in the field of medical diagnosis and treatment, in particular to a breathing amplitude control mask with controllable tidal volume, which belongs to the technical field of puncture assistance. Background technique [0002] The puncture operation guided by imaging equipment is widely used in clinical practice, covering the diagnosis and treatment of diseases, such as tumor biopsy and preoperative positioning under the guidance of CT / MRI / B ultrasound, and tumor cryopreservation under the guidance of CT / MRI / B ultrasound. / thermal / chemical ablation, radioactive I125 seed implantation, CT / MRI / B ultrasound-guided puncture and drainage of abdominal viscera sac / abscess, DSA-guided percutaneous hepatic and bile duct puncture and drainage, etc., the puncture technology is becoming more and more mature, the largest The most difficult point is that breathing causes the diaphragm and adjacent organs to move up and down, which brin...

AI Technical Summary

Problems solved by technology

[0002] The puncture operation guided by imaging equipment is widely used in clinical practice, covering the diagnosis and treatment of diseases, such as tumor biopsy and preoperative positioning under the guidance of CT / MRI / B ultrasound, and tumor cryopreservation under the guidance of CT / MRI / B ultrasound. / thermal / chemical ablation, radioactive I125 seed implantation, CT / MRI / B ultrasound-guided puncture and drainage of abdominal viscera sac / abscess, DSA-guided percutaneous hepatic and bile duct puncture and drainage, etc., the puncture technology is becoming more and more mature, the largest The most difficult point is that breathing causes the diaphragm and adjacent organs to move up and down, which brings troubles to the puncture, especially the lung and liver puncture under the guidance of CT and MRI. The difficulty lies in the patient's breathing during positioning scan and puncture operation The amplitude cannot be consistent, which leads to inevitable errors during puncture, and it is impossible to accurately hit the lesion according to the puncture reference values ​​(puncture point, puncture angle, and puncture depth) obtained by positioning scanning, which requires repeated punctures and multiple adjustments. The patient's trauma and radiation exposure dose, and even serious or fatal complications may occur

[0003] At present, there is still no more scientific breathing amplitude control method that can be widely used in clinical practice to accurately assist puncture. Existing puncture methods and breathing control equipment: 1. Positioning needle puncture method: This method is a commonly used clinical technique at present. In order to tell the patient to take a deep breath during the positioning scan, according to the positioning scan data, the patient also needs to be told to take a deep breath when the first needle is punctured, but since the patient cannot accurately control the tidal volume at the end of each inspiration (pain, tension, etc. ), often cannot accurately hit the target lesion, and can only use the first needle as a positioning needle, and after scanning again, use the first needle as a reference to obtain new puncture data, and then continue to guide the puncture according to the new puncture data, and adjust repeatedly in this way , until it hits the target or fails. Disadvantages: The patient cannot accurately control the tidal volume value at the end of each deep inhalation, there is an error between the actual puncture and the positioning scan, and multiple punctures back and forth increase the risk of puncture (bleeding, pneumothorax, hemothorax, Needle tract transfer, damage to adjacent important organs), and this operation method is technically difficult, requires a certain experienced physician to operate, and the repeatability of the operation process is poor, so it cannot be widely used; 2. Active breathing control device: application In the field of radiotherapy, the breathing monitoring method represented by Elekta's active breathing control system can reduce the degree of physiological swimming of lungs, liver, breast and other organs due to breathing, thereby improving the accuracy of treatment. The device detects the patient's breathing Exercise, the relationship between the amount of gas in the lungs and the position of the tumor is established by detecting the amount of gas in and out through the sensor. During positioning and treatment, the patient is prompted to adjust his breathing by video or the technician's voice. When the inhalation reaches a certain level, the breathing controller turns off. Disconnect the breathing circuit and keep the patient breath-holding for a period of time

During this time period, the activity of the tumor is very small, which is conducive to the collection of clear images. During the treatment, in the same breathing reality, the patient maintains the same breath-holding state as during positioning, which can make the tumor control close to the same as during positioning. Disadvantages: the equipment is complicated to operate, difficult for patients to understand, and the degree of cooperation is not high, so training is required on how to use it; the machine is large in size, 2 meters high, 50 cm wide, and 50 cm long, and training can only be done In a specific room; the video prompt uses a reflector, which is bulky and cumbersome to operate; the breathing tube switch uses an air bag, and the switching speed is slow; 3. Respiratory gating device: Varian respiratory gating Respiratory gating system, mainly used in the field of radiotherapy, can perform clear imaging and gated treatment of lung cancer, breast cancer and upper abdominal lesions. Varian respiratory gating system is characterized by accuracy, ease of use, and high patient comfort. Through Using an infrared tracking camera and retro-reflective markers, the system measures the patient's breathing pattern and range of motion, which is then displayed as a waveform. Gating thresholds are set to ensure that the tumor is within the expected position in the breathing cycle. These thresholds are determined using To allow the gating system to turn on and off the radiation beam to treat during specific phases of breathing, the Varian respiratory gating system contributes to the precision of treatment for lung, liver and pancreatic cancers, disadvantages: the patient is free to breathe, only breathing Treatment within a specific period of time, resulting in an increase in treatment time, only monitoring the rise and fall of the abdomen, in the same state of abdominal rise and fall, the location of tumors in the lungs and liver may vary with the ratio of thoracic breathing and abdominal breathing difference

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