What Researchers Did
Researchers used a non-invasive monitor to measure transcutaneous carbon dioxide levels and oxygen saturation in 89 post-caesarean section patients who received different intrathecal opioids.
What They Found
Sustained hypercapnia occurred in 17.8% (8/45) of patients receiving intrathecal diamorphine and 6.8% (3/44) of those receiving intrathecal fentanyl. The overall incidence of respiratory depression was 17.8% in the diamorphine group and 9.1% in the fentanyl group, with no patients requiring medical intervention.
What This Means for Canadian Patients
Canadian patients undergoing caesarean section with intrathecal opioids may experience transient respiratory depression, particularly hypercapnia. Non-invasive monitoring could help detect these episodes, though medical intervention for clinical respiratory depression may not always be necessary.
Canadian Relevance
This study has no direct Canadian connection as it was not conducted in Canada.
Study Limitations
The study's limitations include a relatively short monitoring period and potential differences between the two hospital settings and opioid regimens.