Chapter 630: 621 Really feeling suffocated (Alliance Leader adds two more chapters of a single-color self-draw)

The tip of the coronary artery plaque rotational ablation catheter is a metal stainless‑steel burr head inlaid with fine diamond particles,

The catheter reaches the blocked coronary artery site, and Zheng Ren opens the burr head.

The burr head is welded to a long, flexible helical rotating catheter, driven at high speed by a downstream turbine, with a speed of 180,000–200,000 revolutions per minute.

At high speed it grinds the porridge‑like plaque into tiny debris that is flushed distally, and the debris can pass through the capillary bed.

Inside the catheter there is a lumen for passing a 0.25 cm‑diameter, 300 cm‑long guidewire.

The drive shaft is housed in a 4.3 F polyethylene sheath; during operation the sheath is pressurized to 40 kPa and continuously flushed with saline for cooling and lubrication.

The plaque is ground away bit by bit, yet Zheng Ren's expression does not relax; his thick brows furrow.

Unlike what he imagined, even with master‑level interventional surgery skill it is still extremely difficult… only then might the procedure be completed.

It seems I need to devote more time to surgical training……

Although there are "huge funds," Zheng Ren still carefully uses every minute and second of surgical training time.

Heaven knows when this training will ever be of great use.

No wonder the interventional cardiologists at Stockholm's Karolinska Institute dare not try it—only when you get your hands on it do you realize how damn hard it is.

"Pop…" Zheng Ren almost hears a crisp sound.

The coronary artery has been ground through……

Fresh blood instantly fills the pericardial cavity.

If this were outside, an emergency rescue would be needed now—open the chest cavity to relieve the pericardial tamponade.

Given Doctor Mei Ha'er's condition, clinical death could be declared outright.

Zheng Ren breaks out in sweat on his forehead.

Surgery, failed.

Again!

Another surgery, failure declared five minutes later.

Again!

Zheng Ren, in the system operating room, focuses on the surgery, completely unaware of the passage of time in the alternate dimension.

In the blink of an eye, twenty‑two consecutive days of surgical training end.

Five hundred twenty‑eight hours, thirty‑one thousand six hundred eighty minutes— the tedious, boring training completed in one go.

Zheng Ren feels no fatigue; instead he is filled with a strange excitement.

What requires tremendous perseverance he treats as entertainment, like playing games all night— tens of thousands of minutes vanish in an instant.

Not eating,

Not drinking,

Not resting,

Not sleeping.

But the surgery, it still succeeded!

This is not a fluke; Zheng Ren performed thirty similar coronary artery recanalization procedures on patients like Doctor Mei Ha'er, each with a 100% success rate.

But it's not over; this is merely an accident, a beginning.

Because Doctor Mei Ha'er has an abnormal clotting condition, merely opening the coronary artery is far from enough.

Zheng Ren certainly does not want the surgery to succeed only for Doctor Mei Ha'er to face the same problem again months later.

Being able to open it this time does not guarantee success next time.

Surgical trauma leaves its mark no matter how high the skill level, and Doctor Mei Ha'er continues to age, his body gradually changing.

Next time, even Zheng Ren dares not guarantee he can repeat the rotational ablation successfully.

Even if successful, it can only extend the patient's survival by a few months, after which they must still face the same situation endlessly.

With the surgery achieving 100% completion, Zheng Ren does not step down but instead picks up a retrievable stent to examine.

This retrievable membrane‑covered stent is the kind commonly used in clinical practice.

Zheng Ren, who rarely ponders long, finally decides to deploy the retrievable membrane stent.

He expands the experimental subject's coronary artery, and the red residue on the system panel quickly fades.

The surgery should end here.

But Zheng Ren does not move; he is a little worried, worried that Big Pig Trotter will not grasp his intention.

However, the worry is unnecessary.

With a thought, the experimental subject lies motionless in the system operating room.

Meanwhile, time seems to have passed several months, and the stent is filled with accumulated thrombus.

This is what Zheng Ren is considering—whether the patient can be deemed truly surgically successful hinges on this.

He carefully opens the balloon of the retrievable stent, then places an absorber, sets the frequency to a certain range, and absorbs the fallen thrombus.

He slowly removes the membrane‑covered stent, very carefully; even with master‑level surgical skill it remains extremely difficult to do.

Unfortunately, as expected, some thrombus still breaks off, flows into other vessels, causing arterial embolism.

This manifests in the experimental subject as cerebral infarction.

Although the surgery failed, Zheng Ren nevertheless shows a smile.

This is the first time he has smiled since entering the system operating room.

The concept is sound; only the operative technique needs improvement.

That's fine; as long as the direction is correct, everything can be discussed.

Again, uninterrupted surgical training— even with master‑level surgical skill, Zheng Ren finds it extremely difficult.

This time he didn't need that long— twenty‑one hours forty‑four minutes of surgical training—and Zheng Ren can now skillfully remove a thrombus‑filled membrane stent; the subsequent steps are simple, just insert a new stent.

The only problem lies in — the patient's cost is relatively high.

In a few months, another stent will need to be placed, and corresponding oral medication will also be required for anticoagulant therapy.

But after all, there is a way now, isn't that so?

After another nearly 10 hours, Zheng Ren became proficient in two techniques, and only then did he smile as he left the System Space.

……

……

In the ward observation room of the Stockholm Karolinska Medical Surgery Research Institute, Su Yun was still lowering their head to fiddle with their phone, not knowing which girl they were chatting with.

And the professor still hadn't returned, while several doctors continued to meticulously record every datum and conduct professional analysis.

Zheng Ren knew that if the patient's condition changed, they would press the corresponding button to summon the most specialized doctor to treat Mei Ha'er.

However, this had nothing to do with Zheng Ren; he leaned back in his chair with a smile.

Seeing Zheng Ren finally move, Su Yun put down their phone.

"Boss, no problem, right?" Su Yun had inexplicable confidence; this kind of surgery, even at Master-level difficulty, he actually believed Zheng Ren could do it.

"No problem." Zheng Ren said.

After a pause, Zheng Ren confidently said: "Absolutely no problem!"

"Then that's good." Su Yun smiled, took a breath, "I'll go help the professor later."

"Help him do what?" Zheng Ren wondered.

"His mouth is more stubborn than the waist of cotton pants; of course he can't win an argument. I'll go help him argue and get this surgery done." Su Yun said with a grin, looking in a good mood.

"Mm, you're better at arguing, go on; I'll wait here for good news." Zheng Ren said, stretching lazily.

Su Yun's face changed; was Zheng Ren dissing themselves?

They're good with words but can't do surgery?!

But looking at Zheng Ren's appearance, it doesn't seem so.

Su Yun felt resentful……MD, they must definitely restart the human heart transplant surgery, so that this guy feels they can't do surgery!