Chapter 223: Sedation and Thresholds

The fluorescent tubes in the corridor gave off a faint hum. When Lin Chen pushed open the hospital room door, the smell of disinfectant was stronger than usual. The doctor was adjusting the IV pump’s flow rate, while a nurse stood beside him recording vital signs. Xiaoman’s eyes were closed. His breathing was steady but shallow, and under the fluorescent light his complexion had taken on an unhealthy grayish pallor.

“Mr. Lin.” The attending physician straightened up and removed his stethoscope. “A sudden tonic-clonic seizure. It lasted eleven seconds. We’ve already administered diazepam, and he’s currently in a suppressed state of consciousness. It’s not the first time, but this time the trigger is fairly obvious. Has he not been resting well lately? Or has there been a lot of emotional fluctuation?”

“Work’s been busy. I haven’t been able to stay with him as much.” Lin Chen walked to the bedside, his gaze sweeping over the waveforms on the monitor. Heart rate 78, blood oxygen 96%, blood pressure 110 over 70. The numbers were still within a safe range, but the EEG baseline showed some irregular spikes. He reached out to tuck the blanket more securely around Xiaoman. When his fingertips brushed the back of his younger brother’s hand, it was icy cold.

“Epilepsy control is a long-term process.” The doctor’s tone was flat, restrained in the way of someone long used to such cases. “The current medication level may have reached a plateau. I suggest adding a twenty-four-hour ambulatory EEG tomorrow and adjusting the sodium valproate dosage while we’re at it. If that still doesn’t suppress it, we’ll have to consider combination therapy. The cost will be higher, and the insurance reimbursement ratio will change as well.”

“Understood.” Lin Chen nodded. “Please issue the orders. I’ll go pay. We’ll follow your medication adjustment plan.”

The doctor glanced at him, as if accustomed to family members who did not question, only executed. “All right. Keep someone here to watch him tonight. If there’s another episode, or if his respiratory rate drops below ten, press the call button immediately.”

The door closed. The room was left with only the regular ticking of the monitor. Lin Chen pulled over a chair and sat down. When his left foot touched the floor, a dull ache shot through his ankle joint. Slowly, he shifted his weight to his right leg, took his laptop out of his backpack, and set it on the bedside cabinet. The screen lit up, its cold glow reflecting the dark circles under his eyes.

The time read 8:40 p.m. There were eleven hours left before his ten o’clock meeting with Su Man tomorrow morning. The memory leak in the demo environment had already been plugged, but he still hadn’t gone through the interface definitions for the DICOM parsing module. In those eleven hours, he had to finish the bare-minimum technical validation while also keeping Xiaoman’s condition below the threshold.

He opened a terminal and ran the remote monitoring script first. The server load curve was steady, and the GC collection frequency was normal. After confirming everything was in order, he switched to the GitLab repository Su Man had opened to him. The code structure was more disciplined than he had expected, but the metadata nesting in the medical imaging files went extraordinarily deep. Private tags from the DICOM standard, pixel-data compression algorithms, patient-privacy desensitization rules—they had all been piled into the same parser. If he ran it as-is, it would most likely collapse under dirty data, just like the lineage graph earlier.

Lin Chen did not rush to write code. He opened his notebook of mistakes and sketched a simple flowchart on a fresh page. Input layer, validation layer, parsing layer, output layer. Beside “validation layer,” he drew a star and wrote: “Start with a format probe. Don’t touch the core logic. Get the smallest sample running first, then talk about architectural refactoring.”

It was a habit he had developed back in his outsourcing days. Never bet on luck. Only test the boundaries.

He created a new Python file, imported the pydicom library, and wrote a lightweight probe script. It only read the file headers, extracting transfer syntax, modality type, and pixel matrix dimensions. When it encountered unrecognized private tags, it skipped them outright and recorded them in the log. Once the script was done, he pulled fifty samples from the test set and ran them in the local sandbox.

First round: 84% pass rate. Sixteen files threw errors because of vendor-custom compression algorithms. Second round: he added a simple fallback mechanism. When the script encountered an unknown compression format, it tried using a standard JPEG2000 decoder as a fallback. The pass rate rose to 92%. Third round: he adjusted the memory-reading strategy, loading large files in chunks to avoid blowing out the stack all at once.

The sound of the keyboard was jarringly sharp in the quiet room. The discomfort in his left foot gradually climbed upward from sitting too long, turning into a constant heavy soreness. Every forty minutes, he stood up, braced himself on the bedrail, and slowly took a couple of steps to get the blood moving again. Xiaoman frowned in his sleep and made a vague sound in his throat. Lin Chen stopped, poured a little warm water, dampened a cotton swab with it, and gently moistened his younger brother’s cracked lips.

“It’s okay,” he said softly, his voice very light. “Go to sleep.”

At one in the morning, the probe script finished running through the logs. He organized the feature distribution of the anomalous samples and wrote a two-page set of interface adaptation recommendations. No long-winded theorizing—just data, problem localization, and time-cost estimates for three refactoring options. He saved the file, pushed it to his private branch, and set a scheduled task to sync automatically at nine the next morning.

Before closing the laptop, he checked his phone. In the team group chat, the engineer stationed on-site had sent a message: “Brother Lin, the client’s technical director just @-ed me in the group asking whether tomorrow’s demo can include a real-time lineage trace animation. I said we’d need to evaluate the performance cost. He hasn’t replied.”

Lin Chen stared at the screen. Real-time animation. With the cyclic dependency only just fixed and the memory headroom at less than fifteen percent, adding animation would be the same as detonating the bomb all over again. His fingers hovered over the keyboard. After a few seconds, he replied: “Tell the director that animation requires additional rendering nodes, and the current architecture doesn’t support it. If they insist, demo latency will exceed three seconds and fail the SLA. Recommend using a static topology graph for now and pushing real-time animation to the second phase. Send that exactly as written. Don’t soften it.”

Sent.

He leaned back in the chair and closed his eyes. There was no anxiety in his mind—only a clear ranking of priorities. The demo environment was cash flow. Su Man’s project was leverage. Xiaoman’s condition was the bottom line. None of the three could be made to subsidize the others. They could only be cut into parallel tracks.

At three in the morning, the monitor still ticked steadily. Lin Chen woke once, checked Xiaoman’s breathing and the IV line. Everything was normal. He reopened the laptop and started reviewing the interface definitions Su Man wanted to discuss tomorrow. Line by line, he read. Line by line, he annotated. When he came across an uncertain field, he checked the official documentation. When he found a logic conflict, he drew a dependency graph on scratch paper.

Outside the window, the sky began to lighten. The early winter morning light filtered through the blinds, slicing parallel bands of brightness across the floor. In the hallway came the sound of the early-shift nurses’ cart wheels, along with the faint stirrings of breakfast being started in the cafeteria far away.

At 6:20, Xiaoman woke up. His eyes were still a little unfocused, but he recognized who was there.

“Ge...” His voice was hoarse, like sandpaper scraping.

“I’m here.” Lin Chen set down his pen and handed him a straw. “Drink some water. The doctor says they need to adjust your medication, and you’ll have an EEG today. Don’t be afraid.”

Xiaoman nodded, his gaze falling on the old picture book on the bedside cabinet. “The drawing... isn’t finished yet.”

“You can finish it when you’re better.” Lin Chen put the picture book away in the drawer. “Today, you rest first.”

At seven, the attending physician came on rounds and issued the test orders. Lin Chen went to the payment window and stood in line. The queue was long. He remained where he was, his left foot tingling faintly. His phone vibrated. A message from Su Man: “Morning. See you at ten. Bring your probe logs and refactoring proposal. If the logic holds, we can sign a letter of intent this afternoon.”

Lin Chen replied: “I’ll be there on time.”

He returned to the room and helped Xiaoman change into the clothes for the test. A nurse came over pushing a wheelchair, preparing to take him to the EEG room. Lin Chen packed his laptop into his backpack, then checked once through his access card, USB drive, and notebook of mistakes. Every item in its proper place.

Just before they left, the doctor called him to the far end of the corridor.

“Mr. Lin.” The doctor handed him a referral recommendation form. “Xiaoman’s EEG waveform shows a tendency toward spreading abnormal discharges. The city hospital’s equipment can only do basic monitoring. If you want more precise lesion localization, I suggest transferring him to the neurology department at the provincial hospital. They’ve introduced an AI-assisted EEG analysis system there. It’s more accurate for evaluating refractory epilepsy. But the wait is long, and the cost is higher. Think it over.”

Lin Chen took the form. The paper was light, but the words on it felt like lead.

Provincial hospital. AI-assisted EEG analysis. And Su Man’s project direction happened to be medical imaging and data preprocessing. Two lines that had once run in parallel had, at this moment, suddenly found a point of intersection.

“How long would the wait be?” he asked.

“Two weeks at the soonest. If you go through the premium channel, maybe faster, but that would be out of pocket.” The doctor paused. “The family has to weigh it themselves. The illness won’t wait, but money is reality too.”

Lin Chen folded the recommendation form and tucked it into his inner pocket.

“I understand. Thank you, doctor.”

He turned and walked toward the elevator. The metal doors reflected his silhouette—shoulders slightly stooped, but his steps steady. He knew that every step from here on out could no longer be taken on inertia alone. Technical debt had to be repaid. His family had to be saved. The window of opportunity had to be seized. There was no perfect solution, only repeated trial and error that edged ever closer to the threshold.

The elevator descended. The sensation of weightlessness came over him. He tapped his phone screen and sent one last instruction to the engineer stationed on-site: “Lock the demo environment to the current version. No one is to touch the configuration. If something goes wrong, I’ll take the blame.”

Sent.

The elevator doors opened, and the cold wind from the first-floor lobby rushed at him. He stepped into the morning light. When his left foot landed, the pain was still there, but he did not hesitate. His phone vibrated in his pocket—a bank debit notification. His account balance had dropped below four digits. He glanced at it, locked the screen, and walked toward the bus stop by the road. The rush-hour traffic was beginning to converge, like a net tightening shut. Standing at the edge of the platform, he opened his notebook of mistakes and wrote on a fresh page: “Item 223: Thresholds are not for breaking through; they are for holding the line. Only by holding the bottom line do you earn the right to talk about the next step.”

The tip of his pen paused. He lifted his head and looked toward the city skyline. Under the gray-blue sky, the first bus of the day was slowly pulling in.