Chapter 1046: with translation of chapter title

Zheng Ren had looked at some of the medical records before. Because of Mayo Clinic's concealment on this side, he had not seen the stent placement surgery for renal artery stenosis nor the removal surgery.

But in later email exchanges, the Mayo Clinic research team also acknowledged this, yet they only sent over the procedure of the stent surgery, while the removal procedure and the patient's condition were missing.

This segment was the first time Zheng Ren had seen it.

The surgery removed the stent from the renal artery stenosis; there was nothing particularly noteworthy about the whole procedure, and Zheng Ren mainly observed the change in the patient's physical condition after the stent was removed.

After the stent was removed, the patient exhibited unstable blood pressure, and in order to avoid blood pressure changes caused by emotional fluctuations, measures such as maintaining a calm state and using a ventilator to assist breathing were taken.

Various rescue medications were basically used all around. Vasopressors and antihypertensives were used alternately, and only after five days did the patient's condition return to the pre‑operative level.

Moreover, the patient's blood pressure was already exceptionally high before surgery; after all that turmoil, returning to the pre‑operative state means the surgery can be considered a failure.

This is probably why the research team has been so tight‑lipped about it, Zheng Ren guessed.

「Boss, I don't see any problem with this tangled stent. 」 Professor Rudolf Wagner said.

"Well, I think it's likely that the radiofrequency ablation caused an abnormal structural change in the renal artery and the renal sympathetic nerve, which led to this situation." Zheng Ren said: "Inserting the stent and having it compress the renal sympathetic nerve for a long time will definitely cause problems."

The professor was stunned.

Where did this judgment of fusion come from? He rubbed his eyes, carefully examined the imaging, and could only see fibrous strands converging, but could not determine whether the renal sympathetic nerve and the renal artery were fused.

However, Professor Rudolf Wagner had already grown accustomed to following Zheng Ren's diagnosis; he did not continue speaking, but instead kept looking alongside Zheng Ren.

Professor Danilo Acosta, on the other hand, had already run out to make a phone call by the time Zheng Ren started looking at the materials.

Work starts at nine here, and he couldn't be sure whether this Chinese doctor would be doing surgery first thing in the morning.

Moreover, there were some related tasks to be done before the surgery, and Danilo genuinely disliked Zheng Ren, as if all the trouble were created and brought by Zheng Ren.

Zheng Ren looked at the images and already had a comprehensive understanding of the condition.

Because he had done anatomical work in the System Operating Room, Zheng Ren's understanding and cognition of the entire condition were the most comprehensive.

Others, even world‑top professors and doctors at Mayo Clinic, could only guess.

This is Zheng Ren's innate advantage.

The percutaneous renal sympathetic nerve radiofrequency ablation surgery first performed at Mayo Clinic was almost textbook‑perfect, accurate and meticulous.

But this accuracy and meticulousness were merely routine in nature. Zheng Ren suddenly felt a stir in his heart and entered the System Space.

He clicked on Surgical Training Time, the System Operating Room rose up from the ground, and Zheng Ren began the surgery.

Zheng Ren wanted to perform a surgery, but it was not a conventional operation; it was radiofrequency ablation.

Of course, it was also not a normal radiofrequency ablation; Zheng Ren directly treated the experimental subject as a cadaver teacher, began dissection, and performed the radiofrequency ablation under direct visual observation.

Radiofrequency is a high‑frequency vibration reaching 150,000 cycles per second.

The human body mainly relies on ion movement to conduct electricity; under the action of high‑frequency alternating current, the direction of ion concentration change follows the current, oscillating back and forth with each positive and negative half‑cycle.

Under high‑frequency oscillation, ions rub against each other and collide with other particles, producing a biological thermal effect.

Radiofrequency ablation was first used on patients with arrhythmia; later it was found that tumors dissipate heat poorly, so tumor tissue becomes hotter than the surrounding normal tissue, and because cancer cells are sensitive to high heat, the heat can kill cancer cells without side effects.

Therefore, radiofrequency ablation is also used to treat tumors, with an effect comparable to surgical resection.

The third liver cancer interventional surgery that Zheng Ren performed on Zheng Yunxia at Haicheng Shi Yiyuan used radiofrequency ablation.

The surgery was very successful; postoperatively, Zheng Yunxia has so far shown no signs of tumor recurrence, and the effect is comparable to surgical resection.

In the procedure of renal sympathetic nerve radiofrequency ablation for treating renovascular hypertension, such an outcome occurred; surely the radiofrequency ablation frequency was wrong, and that is Zheng Ren's speculation.

Just give it a try and you'll know.

Anyway, after finishing the surgery on Zou Jia Hua, there is still plenty of surgical training time left.

In fact, Zheng Ren is very curious about the unknown, especially the various unknowns in medicine, which makes him particularly inquisitive.

He knew that completing such a treatment could mean curing the diseases of tens of thousands or even hundreds of thousands of patients. The key is that this kind of "test" does not consume much surgical training time.

What is consumed is merely the experimental subject.

Under direct vision, Zheng Ren began performing radiofrequency ablation on the initial segment of the experimental subject's renal sympathetic nerve.

The frequency of radiofrequency ablation for tumor tissue is generally around 460 kHz. For cardiac radiofrequency ablation, depending on the patient's condition and disease, the frequency is generally between 200 kHz and 750 kHz.

The frequency adopted by Mayo Clinic is 510 kHz, which cannot be said to be wrong.

Zheng Ren estimates that this is not the first patient to have undergone renal radiofrequency ablation, and the frequency used has a theoretical basis.

But it is precisely this theoretical basis that has run into problems.

He speculates that if the surgery were successful, the frequency should be lower than 510 kHz.

Thus Zheng Ren began experimenting, continually varying the radiofrequency frequencies to achieve his goal.

Finally, when the radiofrequency frequency reached 185 kHz, the effect was most ideal.

Compared with the frequency used by the Mayo Clinic research team, this one is off by nearly twice as much, and moreover it falls below the normal medical radiofrequency range, appearing somewhat low.

Although that is the case, this is nevertheless a fact, the result of an objective experiment.

This experiment is now meaningless to Zheng Ren, yet he always wants to know why.

Moreover, Zheng Ren has only found how to safely use radiofrequency to "cut" the renal sympathetic nerve, but he does not know how the patient's renal sympathetic nerve, melted and solidified by the high‑frequency radiofrequency needle, re‑fuses with the renal artery.

If he were to study this in depth, even a year's worth of surgical training time might not be enough.

After Zheng Ren obtained the answer he wanted, he left the System Operating Room.

「Well then, let's leave it at that. 」 Zheng Ren said after looking through all the medical records.

「Surgery? 」 Su Yun asked.

「Hmm. 」 Zheng Ren said, 「The surgery will probably solve the problem, so let's go ahead and do it. 」

Professor Danilo Acosta looked at Zheng Ren as if he were looking at an idiot; in his view, this kind of surgery was almost like doing it blindfolded, with essentially no chance of success.

This young Chinese doctor before him would only serve as a scapegoat for a failed experiment.