What Researchers Did
Researchers compared outcomes for divers with severe neurologic decompression sickness treated with a helium-oxygen recompression protocol against a separate group treated with standard air-oxygen recompression tables.
What They Found
This retrospective study compared 16 divers treated with helium-oxygen recompression to 17 divers treated with air-oxygen tables and found no difference between the two groups' average outcome scores at discharge. The helium-oxygen group had significantly worse scores at presentation than the air-oxygen group (2.8 out of 9 versus 7.4 out of 9, p less than 0.001). Both groups improved significantly by discharge: the helium-oxygen group rose to 7.6 (p less than 0.001) and the air-oxygen group rose to 8.1 (p = 0.005). Despite the helium-oxygen group starting from a more severe baseline, their final average outcome score was not significantly different from the air-oxygen group's.
Canadian Relevance
No direct Canadian connection identified. The study was conducted at the Israel Naval Medical Institute in Haifa.
Study Limitations
This was a small, retrospective comparison with unequal, non-randomized groups (16 versus 17 patients) whose baseline severity differed significantly, making it difficult to draw firm conclusions about which treatment approach was more effective.