Experimental arrest of cerebral blood flow in human subjects: the red wing studies revisited.
Level 5 - mechanism / opinion, no new human data
Level 5 by design analogy (historical review and archival analysis; non-clinical scholarship)
PubMed 21532128 · doi:10.1353/pbm.2011.0018
What was done
This historical investigation analyzed newly discovered written and photographic records from the 1941–1942 Red Wing studies. In those experiments, researchers investigated loss of consciousness in World War II pilots by applying an inflatable neck collar (the KRA Cuff) to abruptly arrest cerebral blood flow for up to 100 seconds in prisoners and patients diagnosed with schizophrenia.
What was found
The abstract provides no quantitative data or statistical comparisons. It reports a qualitative sequence of physiological responses following cerebral blood flow cessation for up to 100 seconds: initial loss of consciousness, followed by pupillary dilation, tonic/clonic movements, loss of bladder and bowel control, and the emergence of pathological reflexes.
Why it matters
This review documents the methodology, motives, and severe ethical breaches of human experimentation conducted on institutionalized, vulnerable populations during World War II.
Limits
The study is a descriptive historical analysis reliant on archival records rather than a contemporary clinical trial. The abstract provides no sample size, demographic breakdowns, or quantitative physiological measurements.
Cited by
- supports When the heart stops pumping blood to supply oxygen to the brain, human consciousness is lost within 8 to 10 seconds.