Since many advanced medical instruments in China are imported, the buttons on the machines are all in English. Doctors can identify them by being familiar with the English letters "AUTO" that begin with the word "automation".
Using a machine to treat patients is much more difficult than using a washing machine to wash clothes at home. Sometimes we can't even use a washing machine fully automatically, and we need to adjust the parameters ourselves to wash some special clothes. Just like medical machines, at this time, the doctor will turn on the "OPENATOR" working mode and operate the machine himself. Just like the machine's automatic parameter adjustment, the doctor needs to use the human brain to distinguish the waveform value to select the trigger mode to adjust the balloon inflation and deflation time and other operations.
Similarly, the doctor's observation starts from top to bottom, first looking at the electrocardiogram. Some patients have arrhythmias, such as sinus tachycardia and atrial fibrillation, which will affect the counterpulsation effect. The most direct impact is the improper counterpulsation ratio. Don't be afraid of this situation, as long as the appropriate counterpulsation ratio and balloon inflation and deflation time are adjusted, it can be corrected.
Let’s look at the red wave of arterial pressure, which is usually the most important graph that surgeons need to observe.
Like an electrocardiogram, the pressure graph loaded with the balloon pressure has a group of completely cyclical changes. If the internal graph of these cyclical changes appears to be superimposed early or separated slowly like an electrocardiogram, it can basically be determined that the problem is that the inflation and deflation are too early or too late. At this time, the doctor only needs to adjust the inflation and deflation time of the balloon on the machine.
The above problems are relatively easy to diagnose and solve. Experienced Dr. Chen ruled them out one by one, and then told his superior doctor that he had adjusted the machine parameters.
What is difficult is that after adjusting the machine parameters, I found that the problem was not solved. The pressure value after the balloon was inflated was not in place. If it is a factor other than the machine parameters, other reasons that affect the counterpulsation effect cannot be solved by just adjusting the machine.
Doctors need to recheck the balloon catheter that connects the machine to the human body.
Adjusting the catheter is not like adjusting parameters by simply pressing a few buttons on the machine. It is a risky operation. Who would want to move the tube that has been placed in the patient's body and cause sudden heavy bleeding? When the patient is heparinized, randomly moving the tube may cause bleeding.
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Any surgeon would get a headache just thinking about this, I really hope this is not the case.
Shin Youhuan also hoped that it was not the case. He could only face the reality when the problem arose. He said to Dr. Chen, "Try to move the tip of the balloon back a little or forward a little."
The balloon is not placed in the right position, resulting in the inflated air failing to reach the preset pressure, which is usually one of the factors affecting the counterpulsation effect. Now looking at the arterial pressure waveform, this factor is probably the cause.
"I tried it and it didn't work." Doctor Chen answered, praying that it wasn't the case.
"If it doesn't work, we may need to try a larger or smaller catheter." Shen Youhuan encouraged the people below. Suddenly he thought of something and turned to ask Junior Sister Xie Wanying, "Do you have any ideas?"
When asked by Senior Brother Shen, Xie Wanying, who was also observing the operation, expressed her opinion: "Like Senior Brother Shen said, the tip of the balloon can be extended forward."
"I said I tried it," Dr. Chen emphasized again and again.
"Don't be too anxious." Xie Wanying said.
Doctor Chen was stunned: a medical student told him not to be too anxious, did he hear it wrong?
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