MedicalGasPurityISO6145Checker

Medical Gas Purity ISO 6145 Checker

api Hyperpolarized Xenon RPH Xe-129 medical gases CSV→JSON URS & FS rule-based

Utility description: Medical Gas Purity ISO 6145 Checker

Medical Gas Purity ISO 6145 Checker — Medical Xenon Purity Analyzer

ℹ️  Utility controls gas quality per ISO/USP standards:
    • Oxygen (critical for hyperpolarization)
    • Moisture (critical for equipment)
    • CO2 and hydrocarbons (patient safety)

⚠️  CRITICAL: Oxygen kills Xe-129 polarization!
    Moisture disables cryogenic recovery systems.

Usage:
  MedicalGasPurityISO6145Checker.exe                            → demo mode (console output)
  MedicalGasPurityISO6145Checker.exe input.csv output.json      → evaluate your data

Input format:
BatchNumber,ProductName,O2_ppm,N2_ppm,H2O_ppm,CO2_ppm,HC_ppm,Max_O2,Max_H2O,Max_CO2,Max_HC

Example:
  GAS-ISO-2026-001,Xe-129,2.0,50.0,1.0,10.0,0.1,5.0,3.0,500.0,1.0

— WHY IS THIS NEEDED?
Gas purity control is critical for HP-MRI and patient safety:
• Xenon is inhaled by patient, so strict medical standards must be met (ISO 6145, USP <1>)
• For hyperpolarization, absence of paramagnetic impurities (oxygen) is critically important as they destroy spin state
• Water freezes in cryogenic traps of recovery system, leading to equipment failure
• Hydrocarbons and CO2 can be toxic at high concentrations or prolonged exposure

⚠️  CRITICAL:
• Oxygen ≤5 ppm (for maintaining long T1)
• Moisture ≤3 ppm (for cryogenic equipment protection)
• CO2 ≤500 ppm (medical safety standard)
• Hydrocarbons ≤1 ppm (toxicological limit)

Key features:
• Medical gas quality standards compliance check
• Specific control of impurities dangerous for SEOP process
• Total contamination level calculation
• Support for various purity specifications (Medical vs Ultra-High Purity)

Critical parameters:
• Oxygen: ≤5 ppm
• Water: ≤3 ppm
• CO2: ≤500 ppm
• Hydrocarbons: ≤1 ppm

💡 Usage tips:
1. Use gas chromatography with TCD and FID detectors for precise analysis
2. Analyze each new gas batch before loading into polarizer
3. Monitor gas dew point in real-time during system supply
4. Store xenon cylinders vertically to prevent oil impurity ingestion
5. Maintain certificate of analysis log for each gas batch

⚠️ Note: Unlike standard medical oxygen therapy where only main components matter, for hyperpolarized xenon even trace amounts of oxygen (ppm) are decisive for research success. The utility ensures this ultra-precise control.

input.csv

BatchNumber,ProductName,O2_ppm,N2_ppm,H2O_ppm,CO2_ppm,HC_ppm,Max_O2,Max_H2O,Max_CO2,Max_HC
GAS-ISO-2026-001,Xe-129 (Enriched 90%),2.0,50.0,1.0,10.0,0.1,5.0,3.0,500.0,1.0
GAS-ISO-2026-002,Xe-129 (Industrial Grade),100.0,500.0,20.0,50.0,5.0,5.0,3.0,500.0,1.0
GAS-ISO-2026-003,Xe-129 (Ultra High Purity),0.5,10.0,0.1,1.0,0.01,5.0,3.0,500.0,1.0

URS & FS — user requirements and functional specification

URS & FS — User Requirements and Functional Specification

This document defines the controlled interface and behaviour of MedicalGasPurityISO6145Checker for “Medical Gas Purity ISO 6145 Checker”. Limits from the source description are an initial configuration and shall be reconciled with the approved specification, study protocol, equipment instructions and local SOPs before production use.

Domain constraints and critical parameters

Oxygen: ≤5 ppm
Water: ≤3 ppm
CO2: ≤500 ppm
Hydrocarbons: ≤1 ppm

URS — User Requirements Specification

ID	Requirement	Criticality	Acceptance criterion
URS-001	The utility shall accept `input.csv` with the exact headers defined by the data contract.	High	The file is processed without manual header renaming.
URS-002	The utility shall perform a deterministic assessment for “Medical Gas Purity ISO 6145 Checker”.	High	PASS / WARNING / FAIL is produced for each row.
URS-003	Required fields, types, ranges, units and data consistency shall be validated before domain rules.	High	Schema errors are separated from nonconformities.
URS-004	Critical limits from the description and approved local configuration shall create a critical finding.	High	A critical rule violation results in FAIL.
URS-005	The result shall be written to machine-readable `output.json`.	High	JSON contains source values, checks, warnings and failures.
URS-006	The conformity decision shall not use machine learning.	Medium	The result is reproducible from explicit rules and inputs.
URS-007	Traceability of batch, source file, rule version and final status shall be retained.	High	QA/QC can reproduce the decision.
URS-008	The utility shall have exactly one primary portal tag: `api`.	Medium	The other api / instrumental / medical_devices tags are absent.
URS-009	Documentation shall support IQ/OQ/PQ or equivalent CSA/CSV verification.	Medium	The contract, test scenarios and change-control rules are supplied with the utility.

input.csv data contract

#	Field	Type	Unit	Sample	Purpose
1	`BatchNumber`	string	as specified	`GAS-ISO-2026-001`	Batch/lot identifier for traceability.
2	`ProductName`	string	as specified	`Xe-129 (Enriched 90%)`	Name of the controlled product, gas, procedure or equipment.
3	`O2_ppm`	decimal	ppm	`2.0`	Oxygen concentration or flow; a breathing-mixture safety and/or polarization-retention parameter.
4	`N2_ppm`	decimal	ppm	`50.0`	Controlled input.csv field: N2 ppm.
5	`H2O_ppm`	decimal	ppm	`1.0`	Moisture content affecting gas purity, T1 and equipment condition.
6	`CO2_ppm`	decimal	ppm	`10.0`	Oxygen concentration or flow; a breathing-mixture safety and/or polarization-retention parameter.
7	`HC_ppm`	decimal	ppm	`0.1`	Controlled input.csv field: HC ppm.
8	`Max_O2`	decimal	as specified	`5.0`	Oxygen concentration or flow; a breathing-mixture safety and/or polarization-retention parameter.
9	`Max_H2O`	decimal	h	`3.0`	Moisture content affecting gas purity, T1 and equipment condition.
10	`Max_CO2`	decimal	°C	`500.0`	Oxygen concentration or flow; a breathing-mixture safety and/or polarization-retention parameter.
11	`Max_HC`	decimal	h	`1.0`	Controlled input.csv field: Max HC.

BatchNumber,ProductName,O2_ppm,N2_ppm,H2O_ppm,CO2_ppm,HC_ppm,Max_O2,Max_H2O,Max_CO2,Max_HC
GAS-ISO-2026-001,Xe-129 (Enriched 90%),2.0,50.0,1.0,10.0,0.1,5.0,3.0,500.0,1.0
GAS-ISO-2026-002,Xe-129 (Industrial Grade),100.0,500.0,20.0,50.0,5.0,5.0,3.0,500.0,1.0
GAS-ISO-2026-003,Xe-129 (Ultra High Purity),0.5,10.0,0.1,1.0,0.01,5.0,3.0,500.0,1.0

FS — Functional Specification

ID	Function	Implementation
FS-001	CLI execution	`MedicalGasPurityISO6145Checker.exe` supports demo mode and `input.csv output.json` mode.
FS-002	CSV import	Read UTF-8 CSV and validate header, column count and order.
FS-003	Schema validation	Validate required values, empties, types and basic plausibility.
FS-004	Domain rule engine	Apply explicit rules for “Medical Gas Purity ISO 6145 Checker” and locally approved limits.
FS-005	Status aggregation	FAIL for a critical finding; WARNING for a non-critical deviation; PASS for conformity.
FS-006	JSON export	Write source values, applied rules, statuses, warnings, failures and configuration version.
FS-007	Audit support	Retain a result structure suitable for review, investigation, IQ/OQ and change control.
FS-008	Integration contract	LIMS/ELN/MES or an instrument wrapper creates CSV; the utility returns JSON.

output.json example

{
  "utilityId": "medical-gas-purity-iso6145-checker",
  "primaryTag": "api",
  "overallStatus": "PASS|WARNING|FAIL",
  "sourceFile": "input.csv",
  "checks": [
    {
      "parameter": "BatchNumber",
      "value": "GAS-ISO-2026-001",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "ProductName",
      "value": "Xe-129 (Enriched 90%)",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "O2_ppm",
      "value": "2.0",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "N2_ppm",
      "value": "50.0",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "H2O_ppm",
      "value": "1.0",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "CO2_ppm",
      "value": "10.0",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "HC_ppm",
      "value": "0.1",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "Max_O2",
      "value": "5.0",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    }
  ],
  "warnings": [],
  "criticalFindings": []
}

OQ/PQ test scenarios

ID	Scenario	Expected result
OQ-001	Valid example row	PASS or an allowed WARNING under local rules.
OQ-002	Required column missing	Schema error; domain checks do not mask it.
OQ-003	Non-numeric value in numeric field	Type-conversion error.
OQ-004	Critical parameter outside its limit	FAIL and a critical finding.
OQ-005	Boundary value	The result follows the configured ≤ / ≥ / < / > operator.
PQ-001	Real site data	Agreed QA/QC review retaining CSV, JSON, version and checksum.

QA/QC and change control

Do not change column names without updating the validator, documentation and test set.
Retain input.csv, output.json, executable version, rule version and checksums.
Before production use, verify local limits and execute IQ/OQ/PQ or equivalent CSA.
Changes affecting patient safety, dosimetry, gas composition, polarization or equipment require documented impact assessment.

Included in packages

Rph Hyperpolarized Xenon Lifecycle QC Suite

29 utilities for the hyperpolarized xenon lifecycle: isotope composition and gas purity, SEOP and polarization, T1/storage/transport, safe blending and delivery, MRI/SPECT QC, dosimetry, scavenging, recovery and recycling.

Open

RPH isotope family: xenon and gas tracers

Xe-127, Xe-129 and Xe-133 for ventilation, hyperpolarized imaging, gas QC and safety.

Open

RPH organ/system: pulmonary and ventilation

Lung perfusion, MAA, V/Q, aerosol, xenon ventilation, shunt and pulmonary dosimetry.

Open

RPH use case: xenon, ventilation and medical gases

Xe-129, Xe-133, Xe-127, hyperpolarization, SEOP, T1, mixing, scavenging, transport, recovery and ventilation imaging.

Open

RPH workflow: instruments, devices and radiation safety

PET/gamma-camera state, calibration, detector QC, energy window, TOF, shielding and radiation safety.

Open

RPH workflow: product release QC

Assay, purity, sterility, endotoxins, pH, impurities, appearance and batch-release checks.

Open