Chapter 2335: then translation of title, then ===GLOSSARY=== with list of named entities appearing in these lines

Di Du Women and Children's Hospital, in the demonstration classroom of the pediatric surgery department, a tense and orderly simulated Shou Bing is underway.

This is a pair of Conjoined twins, thoracoabdominally united; although they have two hearts, they share a single pericardium, and the hearts are also connected.

The separation Shou Bing is extremely difficult; the Women and Children's Hospital has teamed up with the world's top pediatric Shou Bing center, the Children's Hospital of Philadelphia, and after a series of preparations has entered the perioperative period; as long as the simulated Shou Bing succeeds, the Shou Bing can be launched at any time.

The model produced by computer-aided design 3D printing is identical to the real person.

Intraoperative navigation and two sets of custom-made external auxiliary devices—all of this guarantees that a Shou Bing simulation can be performed.

If the simulated Shou Bing succeeds, this pair of Conjoined twins can undergo separation Shou Bing at a low age, effectively protecting the regenerative capacity of their young hearts.

This set of preoperative preparations incurs enormous expense; the Women and Children's Hospital is sparing no cost to approach world‑advanced medical standards, especially the application of 3D simulated printing and intraoperative navigation systems.

Intraoperative navigation is a preoperative assessment mode in which the patient's preoperative or intraoperative imaging data are accurately matched to the anatomical structures on the operating table through computer reconstruction.

During Shou Bing, the surgical instruments are tracked and their positions are displayed in real time on the patient's images as virtual probes, allowing the surgeon to instantly see the instruments' positions relative to the patient's anatomy, making the surgery faster, more precise, and safer.

Its application is mainly intraoperative use and preoperative simulated Shou Bing, etc.

Intraoperative navigation technology has existed for a long time, but because of its high cost and insufficient computer‑assisted functionality, the application of preoperative simulated Shou Bing has not been fully rolled out clinically.

Zheng Ren knew this early on, just like the experimental subjects in the System Space; however, the technology was immature, and it was nowhere near as useful as a Big Pig Trotter.

Now, doctors at the Women and Children's Hospital are attempting to carry out separation Shou Bing for Conjoined twins in the "System Operating Room" built at great expense.

The surgical model is a 3D‑printed simulacrum identical to the Conjoined twins.

Originally the Shou Bing was to be performed by the medical team of the Children's Hospital of Philadelphia, but during preoperative simulated Shou Bing they discovered severe cardiac deformities in the patient, with a success rate below 5%, so they directly refused.

Under the meticulous care of the Women and Children's Hospital, the Conjoined twins' vital signs can withstand Shou Bing, but as time passes, symptoms of heart failure grow increasingly severe, making further delay impossible.

After many discussions between the hospital and the patient's parents, a consensus was reached—the Conjoined twins have already shown signs of cardiac functional failure; performing Shou Bing offers a slim chance of survival, whereas without Shou Bing there is not even that.

Then let's try.

According to the plan, this is the final simulated Shou Bing.

The CT and MRI three‑dimensional positioning performed yesterday produced bitmap‑style images that three‑dimensionally display the condition inside the Conjoined twins' bodies.

When the Conjoined twins were born and first brought to the Di Du Women and Children's Hospital, examination revealed a shared pericardium with two hearts connected at the atrial level; the great vessels at the base of the heart and the atria were completely separated without communication, the diaphragmatic‑adjacent portions of the heart apices were connected, and the two hearts had a small tubular connection of 3 mm diameter, with the majority of the hearts being membranously connected.

The portion of the liver that is connected is relatively large, but this is not the focus.

For Conjoined twins, the most difficult part is the brain connection, followed by the heart; the remaining organs are not particularly important.

However, the reason the expert team from the Children's Hospital of Philadelphia gave up was that, as the Conjoined twins grew, it was discovered that their heartbeats had different frequencies, making Shou Bing impossible to proceed.

Several attempts at simulated Shou Bing were made, but no one could solve this problem.

Therefore, the Children's Hospital of Philadelphia announced the abandonment of Shou Bing.

Vice President Chen of the Women and Children's Hospital presided over the preparations, ready to try a few more times; if Shou Bing were abandoned now, the child would die within a month, and all previous efforts would be wasted.

For these Conjoined twins, the Women and Children's Hospital has invested enormous effort—only they themselves know the extent.

Not mentioning the top‑tier 3D‑printed simulation of the patient, not mentioning the introduction of the surgical navigation system, countless small details are soaked with the dedication of medical staff.

Careful feeding is the first step.

To strengthen the Conjoined twins' physiques and create conditions for Shou Bing.

Upon admission, the two Conjoined twins were 10 days old, with a total weight of 3.93 kg, belonging to grade II malnutrition.

After admission, they were fed high‑quality newborn formula: initially 3 mL every 3 hours, now increased to 60–90 mL every 3 hours; during feeding, attention must be paid to the bottle's tilt, the size of the nipple, and prevention of choking, vomiting, and even asphyxiation.

During this period, intravenous nutrition was administered—pediatric compound amino acids, fat emulsion, multiple vitamins, trace elements, and intravenous infusion of fresh frozen plasma, human albumin, calcium preparations, etc.

No detail was omitted; the twins' preoperative weight has increased to 7.8 kg.

This,

is only a part.

Besides feeding, basic care must be strengthened, infection controlled, and protective isolation in single rooms implemented.

The ward's air disinfectors operate on a timer for automatic disinfection, ventilation is ensured to keep the air fresh, room temperature maintained at 20 °C–24 °C, and relative humidity at 50 %–60 %.

Upon admission, the patients suffered severe diaper rash and pustular eruptions in the axillae, groin, bilateral lower limbs, and perineal genital areas; after admission, they were bathed daily with 0.05 % povidone‑iodine solution, then applied creams such as Baitobang red buttock ointment to the affected areas, 3–4 times per day.

This, too, is only a basic part.

Because the area of connection in Conjoined twins is relatively large, separation may leave a large skin deficit; to ensure sufficient skin for the incision and avoid skin grafts as much as possible, the bodily bridge must be lengthened and widened.

The bodily bridge is the "bridge" shared by the Conjoined twins.

Upon admission, the Conjoined twins' pre‑umbilical bodily bridge measured 16 cm in length, 4 cm in width, and 37 cm in perimeter; due to high tension in the bridge, the thoracic and abdominal walls must be relaxed to expand the thoracic and abdominal cavities.

The chief of pediatrics personally performed the procedure, pressing daily on the connected part of the Conjoined twins three times a day, each session lasting 15 minutes.

The elderly chief is nearly 60 years old; watching her place four fingers together flat beneath the bridge, thumb on top, and press lightly to heavily in a rhythm, Vice President Chen feels how arduous it is.

While pressing, one must also observe the twins' reactions and complexion; after pressing, a rice bag measuring 16 cm long, 2 cm in diameter, and weighing 150 g is placed on top of the bridge.

Beneath it, an identically shaped cotton bag is used to elevate; during nighttime sleep, the lateral traction method is adopted—placing a small pillow between the two patients so that, when lying on their sides, they are pulled apart as much as possible, striving for a satisfactory bridge preparation by the time of Shou Bing.

Through joint effort, the Conjoined twins' bodily bridge now has a perimeter of 54 cm, a length of 20 cm, and a width of 7 cm.

Everything is ready, yet the Shou Bing cannot be completed.