Triage
Mirin’s compartment was three meters by four. Shelves bolted to the rock walls, labeled in her handwriting, everything reachable without looking. A diagnostic suite older than the one Lev carried but maintained with a discipline he could see from the hatch: calibration stickers current, cables organized. A refrigeration unit humming in the corner, medications stored at temperature. Fifteen years of a clinician building a workspace to fit her hands. But there was a sample centrifuge wedged between the chair mount and the wall because there was nowhere else for it. A rack of culture dishes on the medication shelf, pushed in front of the antibiotics. A microscope clamped to the counter with its power cable running to a splitter she’d rigged from the diagnostic suite. The things you’d find in a lab, except the lab had been in the forward ring when the pressure blew through three compartments on its way to zero.
He popped his helmet before he went in. The aft sections were holding pressure and he couldn’t work a diagnostic through a visor.
She was entering data when he came in. Logging something from the crisis, keeping her records current, because the moment you stopped was the moment it mattered.
“I need your medication profiles,” Lev said. “Modification baselines. Whatever you have on the population.”
“I know what you need.” She finished her entry. Saved it. Turned to face him. “What are you going to do with it?”
“Treat people.”
“My people.”
“Your people.”
She looked at the diagnostic on his belt. Closer now than in the corridor. She was reading the model, the calibration date, the wear on the housing.
“That’s a Veris 4,” she said.
“Yeah.”
“The Veris 4 has a sixty-percent accuracy rate on third-gen cardiovascular profiles.” A specification, not a complaint. “Higher on second-gen. Lower on anything adjusted.”
“I know what it does.”
“So you know it’s going to guess.”
“It’s going to guess. And then I’m going to look at the person and guess better. That’s the job.”
She turned to a second console on the shelf behind her. Pulled a transfer cable from a drawer, plugged one end into the console and held the other out for his portable. On every station Lev had worked, patient records synced. You pulled them to your diagnostic and they were there. Mirin was handing him a cable.
The transfer took a few seconds. What landed on his portable was organized and incomplete. Medication profiles, dosage histories, flagged cases. Fifteen years of patient data built from observation because the automated systems assumed standardized populations and Mara’s Prospect had stopped being standardized a generation ago. It was good data. It was also clearly a subset. The file indices jumped. Whole categories present on her end that hadn’t come across.
“The adults are mostly stable,” she said. “Second and third gen, standard belt profiles with my adjustments. I can tell you what works on whom. Most of the pharmaceuticals in your kit are safe at standard doses.” She glanced at his supplies, cataloging. “The children are different.”
He waited.
“The children I’d want to dose myself. Or at least be consulted.”
“Why?”
“Because their profiles are mine. I built them from observation, not from a spec sheet. I know what I adjusted and why, and I know that a standard second-gen pain protocol on one of my kids will probably overshoot because their metabolisms run faster than the profiles suggest. I’ve been tracking it for years. The metabolic rates, the clearance times, the way they respond to standard dosages versus what I’ve calibrated for them specifically. It’s not one number. It’s fourteen different kids with fourteen different response curves that I’ve built by hand from watching what happens when I give them medication and measuring what their bodies actually do with it.”
“How much faster?”
“Depends on the kid. Twenty percent on some. Forty on others. I can’t tell you exactly why the range is that wide. I have theories. I don’t have a lab anymore to test them.”
Forty percent. On a child, that was the distance between a therapeutic dose and respiratory depression.
“We work together,” Lev said. “You dose the children. I handle adults with your profiles. Anything I don’t recognize, I call you.”
“Fine.”
She walked him through the flagged cases while he scrolled.
“Three adults with cardiovascular complications. Stress-induced, manageable, dosages are in there. Two flags. Sera Tahl, sixteen, red flag. Her cortisol clearance triggers a secondary cardiac pathway that shouldn’t exist. You give her a standard anxiolytic and her resting heart rate drops to forty and stays there. I spent two years mapping that pathway. The dosage in the file accounts for it.”
He scrolled to the red flag. Mirin’s notes ran three pages, handwritten entries converted to text, six dated adjustments over two years. Each one annotated with the reaction, the correction, and what she’d learned. The last entry said: cortisol-linked cardiac suppression confirmed. Standard anxiolytic contraindicated. Use modified protocol attached. Do not deviate.
“The other flag is Dol Vasik. Sixties. His radiation hardening is degrading and his body is using the inflammatory markers to regulate cardiac output. I found this out six years ago when I gave him a standard anti-inflammatory and his blood pressure dropped to sixty over thirty.” She said this flat. Clinical history delivered at the speed of someone who’d been the only qualified audience for her own work for fifteen years. “You suppress the inflammation, you suppress the cardiac regulation. The file has a pain protocol that works around it.”
The detail existed in Mirin’s head and in those files and nowhere else. If she’d been in the forward ring when the pressure blew, this man’s cardiac regulation would have become a mystery again.
He got the shape of her system and moved.
The bypass recycler was in a utility compartment on the aft deck, bolted to the rock wall with brackets that had been welded, re-welded, and reinforced with cargo straps. Lev opened the filter housing.
He stopped.
The housing was built for Kanto-series filters, a standard size across most recycler systems in the belt. The filters inside were smaller. Different seal profile. He looked at the gap between the filter edge and the housing wall. Machined rings filled it, adapter sleeves bridging the size difference, seated with clean welds and proper sealing compound. Good work. Someone who cared about the fit. He ran his finger along the inner face of the nearest adapter. Smooth. Polished, almost. Whoever had made these had finished them like precision parts.
He pulled the first filter out of the housing and turned it over.
The loading wasn’t even. One edge was dark with particulate, dense and packed into the media. It tapered across the face in a clean gradient, heaviest where the airflow entered the cant, lightest on the opposite side. Not the random mottling of a filter wearing out. A pattern. Organized.
He looked at the adapter ring again. At the smooth bore. At the bypass recycler running at reduced volume, pulling air at a fraction of the velocity the system was designed for.
At full capacity, with the right filters, none of this mattered. High velocity meant turbulent flow. Turbulent flow meant chaotic mixing at the filter face. Particulate hit the media everywhere, the surface loaded evenly, and the filter’s rated life was its actual life. That was what the housing was designed for. That was what Breck’s forty-eight hours assumed.
But the bypass wasn’t running at full capacity. It was pulling at maybe forty percent. Lower velocity. Lower Reynolds number. And the adapters, the good adapters, the precision-machined, smooth-bore adapters that someone had spent a sleepless night getting right, were acting as flow straighteners. The air wasn’t tumbling through the housing. It was organizing. Settling into layers. Hitting the canted filter face in a laminar sheet that loaded one edge and starved the other.
He checked the second filter. Same gradient. Third. Same.
The loaded edge of each filter had maybe twenty hours left. The light edge had days of capacity it would never use. Breck’s forty-eight hours was the right math on the wrong assumption. The filters weren’t dying uniformly. They were dying at the edge, and when that edge clogged, the filter was done.
He clipped the filters to the deck grid and looked at the adapters still seated in the housing. Smooth bore. Clean welds. The problem wasn’t that they were bad parts. The problem was that they were too good.
A woman appeared at the hatch. Thirties, belt-built, hands already out. She read the filters clipped to the grid and the open housing and came in.
“Koss sent me,” she said. “I’m on atmospheric.”
“The adapters. Breck made these?”
“Yeah. The right filters haven’t been available for about two years.”
“Where’d these come from?”
“A freighter scrapping out near Hygiea. Breck bought what they had.”
“Dahl,” she said. She had a tremor in her left hand that didn’t slow her down, her right hand picking up the motion her left dropped.
“He machined these at two in the morning,” Dahl said, tapping an adapter ring. “Couldn’t sleep. Said the housing was keeping him up thinking about it. Koss found him in the shop with the lathe running and his dinner pouch still clipped to the bench.” She looked at the gradient on the filter in Lev’s hand. “That’s not even.”
“No.” Lev held up the filter so she could see the taper. “The adapters are too smooth. At bypass rates, the flow organizes instead of mixing. The cant does the rest.”
She looked at the adapter, then at the filter, then back. Working it through. “So at full capacity it wouldn’t matter.”
“At full capacity with the right filters, nothing about this matters. But we don’t have either.”
He unclipped the multitool from his belt. Opened the file. Dahl watched him set the edge against the smooth inner face of the first adapter ring.
“What are you doing?”
“Breaking up the flow.” He scored a line across the polished surface. Then another, crossing it. Rough crosshatching, deliberate, cutting into the finish Breck had put on the part. “The turbulence has to come from somewhere. If the flow won’t do it, the surface has to.”
Dahl was quiet for a moment. “He spent three hours on each of those.”
“I know.”
He scored the second adapter. The file bit into the smooth metal and left ragged lines. It looked like vandalism. It was the opposite of everything the machining represented, the care, the precision, the sleepless hours getting the fit right. He scored the third.
When all the adapters were roughed he re-seated the filters, flipped to put the lighter side into the flow. The rotation would buy some time on its own. The scoring would buy more. The turbulence from the roughened surface would break up the laminar sheet before it hit the media, spread the particulate across the full face, and let the filters wear the way they were designed to wear.
He closed the housing and checked the output. Sixty-nine percent. Up from sixty. The rotated filters putting fresh media into the flow, the roughened adapters spreading the load across the full face instead of burning one edge. The filters would load evenly now, and evenly meant the full surface was working, and the full surface working meant Breck’s rated life was closer to right.
He found Koss in the junction corridor, directing two people reinforcing a hatch seal while monitoring a pressure readout on her portable. She saw him and her face did the math before he spoke.
“The filters were loading unevenly. The way they were, maybe twenty hours. I fixed the distribution and rotated them. Forty hours now, maybe forty-two.”
Koss’s expression didn’t change, but her eyes did. Breck had told her forty-eight. Twenty was a number she hadn’t planned for. Forty was a number she could use.
She was quiet for a moment. Recalculating. Not just the filters but everything downstream of the filters: the work schedule, the evacuation threshold, the structural repair timeline. Every plan she’d made today had forty-eight hours built into it.
She turned back to the hatch seal.
He moved through the aft sections. The community was working. Nobody idle, nobody waiting. A man patching a cable run. Two women reorganizing supply storage to clear corridor space. A teenager hauling water containers to the compartments where families had compressed. Koss had set the work up and the people were doing it with the competence of a community that had been solving its own problems since before the rescue network knew they existed.
He treated people. Checked vitals, read the diagnostic, cross-referenced Mirin’s profiles, adjusted dosages, moved on. A woman with elevated blood pressure, standard for the stress, treated and cleared. A man whose headache turned out to be dehydration because he’d been working the cable runs for ten hours and forgotten to drink.
A man in his forties with a hand tremor that had started that morning. Stress-induced, probably, but the Veris 4 flagged a cardiovascular irregularity underneath it. He checked Mirin’s file, adjusted the blood pressure protocol, watched the tremor settle. The man nodded once and went back to hauling cable.
A teenager next, sixteen maybe. She’d taken a laceration helping move equipment when the forward ring blew. Mirin had sealed the cut, but the girl was scared. Elevated heart rate, shallow breathing, wide pupils. She looked like a sixteen-year-old whose home was falling apart, which she was. He almost moved on. Then he ran the diagnostic anyway, because he was here and the diagnostic was in his hand and you checked.
Mirin was in the corridor. Making rounds of her own, checking on her people while Lev checked on his patients. She saw him with the girl and came over without being asked.
The cardiovascular numbers were wrong. He looked at them for a few seconds longer than he usually looked at anything. Heart rate variability was low, which made sense for someone scared. But low in a specific way that didn’t match the fear response. Fear had a signature. Elevated heart rate, yes, but the variability pattern was rhythmic, the body’s stress system doing what stress systems did, ramping up and regulating in cycles. The body scared but managing.
This wasn’t that. The heart rate variability was flat. The modification-enhanced cardiovascular regulation that should have been there, underneath the fear, smoothing the stress response, keeping the cycle running, wasn’t engaging at all. He pulled Mirin’s profile on the girl. The profile said the regulation should be there.
“Fear response,” Mirin said, reading the numbers from the hatch. “Heart rate’s up, variability’s down. She’s scared.”
“The variability isn’t fear.” He turned the portable so Mirin could see the waveform. “Fear is elevated but cyclic. The stress system engages and the regulation modulates it. You get peaks and recovery, peaks and recovery. This is flat. The regulation pathway isn’t being overwhelmed by the fear response. It’s absent. It’s not engaging at all.”
Mirin looked at the waveform. She looked at it for a while.
“Show me her file,” Lev said.
“The regulation pathway is documented. I’ve tracked it since she was twelve. I calibrated her dosages around it.” She didn’t reach for her portable. “It’s supposed to be there.”
“Let me,” Mirin said. She adjusted the calming agent herself. Her dosage, her protocol, calibrated for this specific girl’s specific response curve. She administered it and watched.
The numbers came back. Slowly. The breathing settled. The heart rate dropped. The variability started cycling again, the regulation pathway engaging late, catching up to a demand it should have been meeting all along. The fear was still in the girl’s face but the cardiovascular system was doing what Mirin’s profile said it should do.
“I should have seen that,” Mirin said.
She was still looking at the waveform on Lev’s portable. The flat section before the regulation kicked in. She looked at it the way Lev had looked at the filter gradient, recognizing a pattern she hadn’t been looking for. Then she closed the file on her portable and moved to her next patient.
An older woman with a bronchial cough from the bypass air quality. Three others with the same symptom. All within Mirin’s profiles. All manageable. All requiring the dose adapted from standard.
He was adjusting on every patient. Each body drifting from the standard in its own direction, the way you’d expect from a population maintaining itself with limited resources over decades. One in five would need adjustment on a station with current profiles. Here it was every one.
A boy, maybe seven, with a cough from the bypass air. Lev ran the diagnostic and called Mirin over. She looked at the numbers, pulled up her profile on the boy. “Bronchodilator at forty percent standard,” she said. Forty percent. He administered it. The cough settled.
A girl, ten or eleven, not coughing but listless. Low energy, pale. He scanned her and the metabolic rate was running high, burning fuel her body didn’t have. Mirin checked her file. “She needs calories, not medication. Her metabolism runs about thirty percent above what your diagnostic thinks is normal.” She handed the girl a ration pack from her pocket. Carried them for this.
Another boy, younger, five or six. Fever. Lev’s diagnostic said treat it. Mirin shook her head. “His baseline runs hot. Thirty-eight is his normal. Thirty-nine is a fever. Your machine thinks thirty-seven-five is a fever because your machine doesn’t know him.”
Every child Mirin adjusted, she adjusted down. The metabolisms running high, the cardiovascular baselines elevated, the temperature set points shifted up. Every adult Lev treated drifted in its own direction, random, individual. The children all drifted the same way.
He didn’t have enough to call it a pattern. He filed it.
The comm from Caro came while Lev was checking the pressure differentials across the aft hatches. Caro’s voice was flat. The situation had stopped being a problem and become a schedule.
“Mount bolts are failing. Two of six cracked. Displacement is still moving.”
“How long?”
“Six hours. Maybe eight.”
He checked the atmospheric readout on his portable. The bypass had dropped to fifty-eight percent. Down from sixty-nine that morning. The filters were loading evenly now but the media itself was degrading under sustained load, breaking down faster than he’d projected. His forty hours were closer to thirty-five. If the structural patch failed and they lost the adjacent section, the bypass volume dropped by a third and thirty-five became something he didn’t want to calculate in a corridor where people could see his face.
The margin he’d spent the morning building was gone.