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 the washing machine to be fully automatic and need to adjust the parameters ourselves to wash some special clothes. It is the same with medical machines. At this time, the doctor will turn on the "openator" working mode
, operate the machine by yourself. Just like the machine automatically adjusts parameters, 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.
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 effect of counterpulsation. 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 overlaps in advance or slows down and separates like the electrocardiogram,
Basically, it can be concluded that the problem is that the balloon is inflated and deflated too early and 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. The experienced Dr. Chen eliminated them one by one, so he told his superior doctor that he had adjusted the machine parameters.
The difficulty is 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 in place. If it is factors other than machine parameters, other reasons that affect the counterpulsation effect cannot be solved by adjusting the machine alone.
The doctor needs to re-examine the balloon catheter that connects the machine to the human body.
Adjusting a catheter is not like adjusting parameters and simply pressing a few buttons on a machine. It is a risky operation. Who wants to move the tube that has been placed in the patient's body and cause sudden massive bleeding? What should I do if the patient has heparin in his body?
If the tube is melted, you may cause bleeding if you move it arbitrarily.
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, which is usually one of the factors that affects the counterpulsation effect. Now looking at the arterial pressure waveform, it seems that this factor has not disappeared.
"I've tried it but it didn't work." Dr. Chen prayed in his heart that it wouldn't be the case and answered.
"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 Brother Shen, Xie Wanying, who was also observing the operation, expressed her opinion: "As 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 asked him not to be too anxious. Did he hear wrongly?
