While Zhao Heng moved the ultrasound probe, he watched the images on the bedside ultrasound monitor, continuously reconstructing the patient's anatomical 3D structure in his mind.

This ability slowly emerged after he had absorbed and integrated numerous surgical skills and experiences from other surgeons.

As a surgeon, the requirement for spatial perception and distance is inherently high.

One must know that often during surgery, there is insufficient visibility, and at such times, the surgeon's spatial awareness becomes essential.

To become an excellent surgeon, one must possess some degree of this capability.

Surgical experience naturally encompasses insights and understanding of spatial awareness and perception.

And with Zhao Heng having integrated so much of the surgical experience, his spatial perception ability is particularly outstanding.

Watching Zhao Heng's operation, everyone present was somewhat perplexed, not understanding exactly what Zhao Heng was doing.

Soon, the 3D modeling in Zhao Heng's mind was completed.

"It's done, the ultrasound can be moved away now."

Zhao Heng felt that the anatomical 3D modeling in his mind was basically complete and said to nurse Xiaoli.

"Okay, Dr. Zhao."

Xiaoli quickly took over the ultrasound probe from Zhao Heng, placed it on the ultrasound machine, and pushed it aside.

"Zhanpeng, Wang Chao, now you need to stabilize the patient's position, especially preventing any wobbling."

Zhao Heng said to Zhanpeng and Wang Chao, who were standing on either side of the operating table, already very tired and strained from holding up the patient.

"Alright."

Zhanpeng and Wang Chao replied in unison.

No matter what they were thinking, at this moment, they could not afford to oppose Zhao Heng.

"Prepare the puncture needle kit."

Zhao Heng then said to nurse Xiaohong.

"What?!"

Upon hearing Zhao Heng ask the nurse to prepare the puncture needle, He Wei couldn't help but exclaim.

The biggest issue with administering anesthesia to this heavyweight patient is that the needle cannot penetrate beyond the fatty layer on the patient's back, and if the distance isn't sufficient, naturally it won't reach the epidural space for injecting the anesthetic.

"Dr. Zhao, perhaps we need to use another, as the length of this puncture needle seems insufficient."

He Wei asked in puzzlement.

"I checked in the operating room equipment room yesterday; this 8.5cm puncture needle is already the longest available."

Zhao Heng slightly shook his head and said.

"The patient's fat layer is 10cm thick; if the puncture needle is only 8.5cm, that distance isn't enough for a puncture, is it?"

He Wei voiced the question in everyone's mind at the moment.

"Indeed, the patient's fat layer is 10cm, but with this lateral position, the skin on the patient's back is tightened, reducing at least 1cm in position, and since the fat layer is relatively loose, compression can further reduce it, so it becomes adequate."

Zhao Heng calmly explained.

With his explanation, He Wei and everyone present suddenly realized.

Such finesse in the operation!

Everyone looked at Zhao Heng and couldn't help but marvel.

"What about the surface anatomical landmarks?"

He Wei asked again in confusion.

In face of this super large patient, common surface anatomical landmarks are almost invisible on this patient.

Without guidance from the surface anatomical landmarks, determining the precise puncture location is impossible.

"With the earlier ultrasound scan, I've basically established a local anatomical model of the patient, and finding this location is possible."

Zhao Heng explained simply.

"This..."

He Wei was astonished by Zhao Heng's words.

Just earlier, resident doctor Xiao Huang mentioned that the human brain is not a computer and cannot establish a 3D model in the mind.

Unexpectedly, this statement was disproven so quickly.

Who on earth is this Zhao Heng?

At this moment, He Wei couldn't help but wonder.

Soon, nurse Xiaohong pushed over the station with the puncture needle kit.

Zhao Heng donned gloves, picked up the puncture needle from the station, while nurses Xiaohong and Xiaoli disinfected the skin and prepared the surgical drapes.

The critical puncture was about to start, and everyone in the operating room watched Zhao Heng intently, not daring to blink.

To others, this patient was like a mountain of flesh, and finding the accurate puncture location, let alone distinguishing the structures, was a challenge.

But Zhao Heng was going to perform this blind puncture under such difficult circumstances.

In this kind of situation, it requires a unique sense to penetrate through the fog.

This sense is spatial perception.

Everyone has spatial perception, but the degree varies among individuals.

Spatial perception refers to the perception of spatial properties such as distance, shape, size, and orientation of objects.

The most common and intuitive is the sense of direction.

For instance, those applying to be pilots must undergo spatial perception tests, where they are fixed onto a centrifuge, spun at high speed, and after it stops, they must accurately indicate the directions of east, south, west, and north.

In real life, some people cannot even distinguish left from right, let alone such a degree of spatial perception.

One could say, it is a rare ability possessed by very few!

"Hold down the sides of this position."

The 3D model in Zhao Heng's mind kept functioning, enabling him to determine an accurate location for the puncture, and after confirming, Zhao Heng instructed nurses Xiaoli and Xiaohong.

"Okay, Dr. Zhao."

Nurses Xiaoli and Xiaohong quickly stepped forward, standing on either side of Zhao Heng, forcefully compressing the sides of the spot Zhao Heng indicated.

Think about it, a big patient lying on the operating table, with two people holding from both sides, while two nurses exhaustingly compress thick fat, only then can the final puncture be performed.

This was really an effort!

Zhao Heng took a deep breath and picked up the puncture needle, aiming at the spot, and pierced it in, with no hesitation or pause, fully mastering the essence of stability and precision.

Being a doctor is like this; the preparation time often far exceeds the actual operation time.

Success or failure can be decided in a moment.

Such moments of life and death are regular occurrences in the medical profession.

Seeing Zhao Heng advance the needle without a hint of hesitation, everyone present held their breath in nervous anticipation.

No one dared to make the slightest sound, fearing to disturb Zhao Heng, for if his hand trembled slightly, the anesthesia could be deemed a failure!

Swish!

When the puncture needle reached a certain point, Zhao Heng seemed to hear the sound of the needle tip piercing the periosteum.

At this moment, he was very sure the needle tip had entered the epidural space.

Thinking of this, he withdrew the stylet from the puncture needle, turned to He Wei, and said, "Dr. He, could you please pass the anesthetic?"

Obviously, nurses Xiaoli and Xiaohong had to keep compressing the patient's fat; otherwise, the thick fat would quickly dislodge the needle from the space cavity.

"Alright."

Hearing Zhao Heng's request, He Wei immediately nodded, donned gloves, picked up a syringe, drew a dose of anesthetic, and handed it to Zhao Heng.

"Thank you."

Zhao Heng said casually, then injected the anesthetic through the needle into the cavity.

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