Looking at the gradually decreasing heart rate, Doctor Wei immediately reported.

This was due to the separation affecting the heartbeat center; Song Zimo's operations were already as controlled as possible, but the impact of the procedure was unavoidable.

"Use intermittent operations, don't rush, don't fear," Yang Ping instructed him.

If there's an opportunity to operate and then rest, it would be best to minimize the time the heart rate stays at a lower frequency, as too low of a heart rate can lead to ischemia or cardiac arrest.

For operations at this location, only Yang Ping could manage it without affecting the heart rate. Song Zimo was already remarkable for avoiding cardiac arrest, which was why the patient was recommended by the United States. If they attempted the surgery, there was a high chance of cardiac arrest.

Doctor Wei sat down without speaking further. Although he was calm by nature, he hadn't experienced many major situations. So, when he saw the heart rate drop to the critical level of 40 beats per minute, he felt slightly panicked and scared.

At the institute now, they could simultaneously open two to three surgeries, but today only two were opened because Xu Zhiliang needed to be here to assist Song Zimo.

Liang Fatty patrolled between the two operating rooms. If any patient's surgery encountered danger, he could intervene in the rescue immediately, given he was the Anesthesiology Department Director, with the richest experience. During surgeries, patient life was entrusted to the anesthesiologist's monitoring.

Liang Fatty entered for inspection, and Doctor Wei reported to Liang Fatty: "The heart rate just dropped to 40 beats per minute."

"Don't be afraid, this situation often occurs in such surgeries. Remember the duration, and report the heart rate every 30 seconds," Liang Fatty instructed.

When he saw Professor Yang was also in the operating room, he immediately greeted him: "Professor! Personally overseeing?"

Yang Ping nodded, and Liang Fatty stood beside him, accompanying Yang Ping to observe the surgery for a while.

"How's the coronary bypass going?" Yang Ping asked.

"Fine, two have been connected, and preparing for four," Liang Fatty replied.

"Off-pump bypass?"

"Yes."

Xia Shujin seemed to progress rapidly. If he were still at his original hospital, he could hardly lead such a surgery now. At most, he might only assist, or perhaps not even have the qualification to assist.

"The heart rate isn't coming up; it was fluctuating earlier, but now it's consistently at 40 beats per minute, dropping to 35 once but quickly returning to 40," Doctor Wei kept his eyes fixed on the electrocardiogram monitoring screen, hardly daring to blink.

Yang Ping turned and took a glance, confirming that this was the case. If the heart rate didn't rise for a long time, there could be danger.

Song Zimo paused his operations, lifted his eyes from the microscope's eyepiece, turned to look at the monitoring screen, and took a deep breath.

For this type of surgery, achieving this stage was already remarkable.

Originally, many hospitals both domestic and abroad could perform cavernous hemangioma surgeries on the pons. Typically, any top-tier hospital capable of brainstem operations could handle it, although the results varied.

This cavernous hemangioma was tricky, or else it wouldn't have been recommended to Sanbo Hospital by the United States. Song Zimo was already mentally prepared but didn't anticipate the surgery being even more challenging than expected.

It's not good; the heart rate remains at 40 beats per minute; continuing like this will eventually cause issues.

"Continue! Slow down, careful, separate this one centimeter of adhesion, and the heart rate will naturally rise," Yang Ping instructed Song Zimo.

"Okay!"

Song Zimo immediately re-engaged in the operation.

"When pulling with the left forceps, avoid tension; use a tension-free separation technique," Yang Ping commanded assertively.

In most surgical separations, tensions are typically applied to facilitate operations. It's like a piece of cloth you need to cut; if you pull it tight, it's easier to cut. If it's loose and relaxed, cutting becomes strenuous.

Surgery follows this principle: slightly tense the separated targeted tissue. With slight tension, using a surgical knife or scissors for separation becomes much easier. Loose tissue is not only difficult to separate but easy to mistakenly injure.

Tension-free separation demands certain skills, particularly in such areas where tension-free separation is superior surgical fundamentals.

However, in this situation, tension-free separation is clearly the optimal choice, as any tension can affect the surrounding nerve functions; the current heart rate drop is due to such tension.

Adopting tension-free separation introduces another issue: increased difficulty and risk in separation, significantly raising chances of accidental injuries. The consequences could be catastrophic if any injury occurs.

But knowing Yang Ping's understanding of Song Zimo, his current surgical level can handle this, although psychologically, he needs to independently experience this.

Currently, Song Zimo's laser surgical knife precision is 0.1 millimeters, with each cut's depth or distance being 0.1 millimeters. Completing a one-centimeter adhesion strip requires at least ten operations, demanding very skilled execution; every cut must be precise without overlapping, ineffective or inefficient actions.

Yang Ping had considered thoroughly earlier that Song Zimo could cope, so he stood: "I have some business outside for a while, work slowly, call me if any issues arise."

Actually, he went to the handwashing sink deliberately saying he'd temporarily leave to break Song Zimo's dependence when facing such difficulties, establishing his confidence in independently handling problems. If any real issues occur, he would just finish washing hands and promptly return to assist.

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