What Researchers Did
Researchers used Doppler ultrasound to measure sub-clinical decompression stress in 28 hyperbaric chamber attendants during 163 exposures to a routine 243 kPa HBOT table.
What They Found
The study found that 68% of exposures resulted in low decompression stress (K-M Grades 0-I), 22% in intermediate stress (Grade II), and 10% in high stress (Grades III-IV). Female gender, increasing age, weight, and exposure frequency were associated with higher bubble grades, though no clinical decompression sickness cases occurred. The standard 243 kPa table, involving 90 minutes at pressure with a 20-minute oxygen decompression, met DCIEM definitions for acceptable decompression stress.
What This Means for Canadian Patients
This research helps ensure the safety of medical staff who operate multiplace hyperbaric chambers, which is crucial for the continuous and safe delivery of hyperbaric oxygen therapy to patients. By understanding and managing decompression stress in attendants, clinics can maintain a stable and experienced workforce, supporting the availability of HBOT for various conditions. This indirectly contributes to a safer and more reliable treatment environment for Canadian patients.
Canadian Relevance
This study has direct Canadian relevance as it involves Canadian authors (Nishi R, Eastman D) and references the Defence and Civil Institute of Environmental Medicine (DCIEM), a Canadian organization, for defining acceptable decompression stress. The study focuses on the occupational health of hyperbaric chamber attendants, which is vital for the safe operation of HBOT facilities across Canada.
Study Limitations
The study primarily assessed sub-clinical decompression stress using bubble grades rather than actual cases of decompression sickness, and significant variability was observed among individuals.