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Thresholds for Spinal Anaesthesia-induced Hypotension During Caesarean Section.
1Department of Anesthesiology and Intensive Care, Kathmandu Medical College Teaching Hospital, Sinamangal, Kathmandu, Nepal.
Kathmandu University Medical Journal (KUMJ)
|November 23, 2021
Summary
This study found that systolic blood pressure of 90 mmHg and mean arterial pressure of 60 mmHg are the most common thresholds for defining hypotension during caesarean sections under spinal anaesthesia. Further research is needed to establish safe and clinically relevant criteria.
Area of Science:
- Anesthesiology
- Obstetrics
- Cardiovascular Physiology
Background:
- Spinal anaesthesia is standard for caesarean sections.
- Hypotension is a common complication with potential adverse maternal and foetal outcomes.
- Current hypotension-defining criteria lack standardization.
Purpose of the Study:
- To identify blood pressure thresholds for spinal anaesthesia-induced hypotension during caesarean section.
- To analyze the characteristics and symptoms associated with hypotension.
Main Methods:
- Retrospective cohort study of caesarean sections performed under spinal anaesthesia.
- Reviewed intraoperative hypotension reports from January to December 2019.
- Categorized hypotension-defining thresholds including systolic blood pressure (SBP) and mean arterial pressure (MAP).
Main Results:
- Hypotension occurred in 11.5% of 1116 caesarean sections.
- Twelve different hypotension-defining thresholds were used.
- SBP of 90 mmHg (41%) and MAP of 60 mmHg (21.7%) were the most frequent thresholds.
Conclusions:
- SBP of 90 mmHg and MAP of 60 mmHg are commonly used to define hypotension during caesarean sections with spinal anaesthesia.
- Further investigation is required to determine safe and clinically relevant hypotension-defining criteria.
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