P‐BB‐5 | A New Thermoregulated Container System for Cold Processing of Whole Blood Donations in Extreme Climate Conditions
Bibliographic record
Abstract
Per Canadian quality standards, the internal temperature of whole blood (WB) must reach 10°C ≤24 h post-donation and be maintained at 1–10°C until processing. However, complying with this standard can be difficult for WB donations (WBD) collected at blood drives >8 h away from a processing center. Thermoregulated container systems (TCSs) are essential to adequately store WBD in the extreme climatic conditions encountered in Québec (Canada). The aims were to develop and validate a TCS that can maintain the temperature of WBD at 1–10°C for up to 24 h post-donation in extreme climatic conditions (−30°C to 40°C). The TCS consisted of an inner cage made of vacuum insulation panels (VIP); a water-based cooling material wrapped in a polyethylene foam (ICE-PE) that ensured moderate WB cooling; and multiple 5°C phase changing materials (PCM5). In Phase 1, WB collection kits filled with 555 mL of a 0.9% saline solution at 30°C mimicked fresh WBD, and internal temperature was monitored using thermal probes. In Phase 2, eighty WB units (each containing 450–550 mL) were collected. The WB units were shipped to the processing center in the TCSs within 24 h of collection. Both real and controlled environments were tested to reproduce extreme winter (−30°C) and summer (+40°C) conditions. Various quality parameters (e.g., residual white blood cell [rWBC] count, hemolysis rate of red blood cell concentrates [RCCs], and Factor VIII [FVIII] in plasma) were measured. The ICE-PE and PCM5 were stored in VIP containers for up to 48 h under extreme climatic conditions before use. They maintained their thermoregulating properties and enabled WBD to be transported over a 24-h period in compliance with Canadian quality standards. At day 42 post-collection, the mean ± standard deviation (min–max) RCC hemolysis rate was 0.2% ± 0.1% (0.1%–0.9%), and 79 of the 80 WBD (99%) complied with current hemolysis standards (<08% for 90% of tested product). All RCCs met the current criterion of <5 × 106 rWBC/unit. As expected, FVIII recovery was lower in extreme winter conditions (i.e., mean of 0.6 ± 0.3 IU/mL [0.3–1.1 IU/mL]) than normal conditions (0.8 ± 0.3 IU/mL [0.3–1.7 IU/mL]). FVIII recovery was particularly low for products obtained from WBD that approached the freezing point during transport, but >75% of WBD had ≥0.52 IU/mL in all conditions tested and thus met current quality standards. TCS cooling materials can be stored in VIP containers for up to 48 h before use. The TCS described here can therefore be used in extreme climatic conditions to transport WBD for up to 24 h without impacting product quality, thereby providing critical operational flexibility to maintain blood bank inventory levels.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".