Since many of China's advanced medical instruments are imported, the buttons on the machines are all in English. Doctors can identify them by being familiar with the English letters for "automation" starting with "AUTO".
It is much more difficult to treat patients with a machine than to use a washing machine to wash clothes at home. Sometimes we cannot use a fully automatic washing machine and need to adjust the parameters ourselves to wash some special clothes. It is the same as medical machines. At this time, the doctor will turn on the "OPENATOR" working mode and operate the machine by himself. Just like machine automatic adjustment parameters, doctors need 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.
In the same way, the doctor's observation starts from top to bottom, first looking at the electrocardiogram. Some patients have arrhythmias themselves, such as sinus tachycardia, atrial fibrillation, etc. These conditions will affect the counterpulsation effect. The most direct impact is the improper proportion of counterpulsation. Don’t be afraid of this situation, as long as you adjust the appropriate counterpulsation ratio and balloon inflation and deflation time, you can correct it.
Let’s look at the red wave arterial pressure. This is usually the key figure that the surgeon needs to observe most.
Like the electrocardiogram, the pressure pattern loaded with balloon pressure has a group of completely periodic changes. If the group of periodic changes in the graph internally superimposes in advance or slows down the separation like the electrocardiogram, Basically, it can be concluded that the problem is that the air is inflated too early or too late. At this time, the doctor only needs to adjust the balloon inflation and deflation time on the machine.
The above are all problems that are relatively easy to judge and solve. Dr. Chen, who was experienced, ruled out the problems one by one, so he told his superior doctor that he had adjusted the machine parameters.
The difficulty lies in the fact that after adjusting the machine parameters, it is discovered that the problem has not been solved. The pressure value after the balloon is inflated is not adequate. If it is due to non-machine parameter factors, other reasons that affect the counterpulsation effect cannot be solved by light-adjusting the machine.
Doctors are required to re-examine the balloon catheter that connects the machine to the human body.
Adjusting the catheter is not like adjusting parameters and pressing a few buttons on the machine. It is a risky operation. Who would have thought that if the tube that has been placed in the patient's body is moved around again, sudden heavy bleeding will occur. When the patient's whole body is heparinized, it is really possible to cause bleeding by tampering with the tube at will.
The surgeon will get dizzy just thinking about this, I really hope not.
Shen Youhuan also hoped that it was not the case. If the problem arises, he can only face the reality and said to Dr. Chen: "Try making the top of the balloon go back a little or extend a little forward."
The balloon is not placed in the right position, causing the inflator to fail to reach the preset pressure. This is usually one of the factors that affects the effectiveness of counterpulsation. Now looking at the arterial pressure waveform, it seems that this factor is gone.
"I've tried it but it didn't work." Dr. Chen answered, praying in his heart that it wouldn't be the case.
"If it still doesn't work, you may need to try a larger or smaller catheter." Shen Youhuan encouraged the people below. Suddenly thinking of something, he turned to junior sister Xie Wanying and asked, "Do you have any ideas? "
When asked by Senior Brother Shen, Xie Wanying, who was also observing the operation, expressed her opinion: "As Senior Brother Shen said, the top of the balloon can be extended forward."
"I said I tried." Dr. Chen emphasized again and again.
"Don't be too anxious." Xie Wanying said.
Dr. Chen was stunned: A medical student told him not to be too anxious. Did he hear it wrong?
