What Researchers Did
Researchers conducted a retrospective statistical analysis of a 1966 study involving 22 stroke patients treated with hyperbaric oxygen (HBO2) to examine the influence of time post-stroke on recovery.
What They Found
They found that time post-stroke was the only significant factor for recovery, with each passing hour decreasing the chance of at least partial transient recovery by 62%. Of 13 patients treated within one to five hours, nine (41% of the total 22) showed some recovery, though only two had permanent recovery. Beyond six hours post-stroke, only one patient (11%) experienced partial recovery with relapse.
What This Means for Canadian Patients
For Canadian patients experiencing acute stroke, these findings suggest that hyperbaric oxygen (HBO2) treatment may be most effective if administered within the first three hours post-stroke. HBO2 could potentially be used to assess the risk-benefit of giving rtPA, potentially improving outcomes for those eligible for this therapy.
Canadian Relevance
This study has no direct Canadian connection as it was not conducted in Canada, nor did it involve Canadian researchers or patients.
Study Limitations
This study is limited by its retrospective design, small sample size of 22 patients, and reliance on data from a 1966 study.