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Original Article

Anaesth. pain intensive care. 2021; 25(5): 660-666


Awareness during general anaesthesia for caesarean section: A prospective observational cohort study

Shubhra Srivastava, Vineetha Chandran, Devangi Ashutosh Parikh.




Abstract

Objective: The incidence of intra-operative awareness with explicit recall in the western world has been reported to be between 0.1% and 0.2% in the general surgical population and up to 1-2% of patients at high risk for this complication. There is paucity of literature of awareness in the Indian population undergoing caesarean section (CS), therefore we wanted to study the incidence of awareness in this high-risk group in Indian population.

Methods: We have prospectively evaluated the incidence and characteristics of awareness during general anaesthesia (GA) in pregnant patients undergoing caesarean section in a tertiary care hospital.
Structured interviews were conducted in the postanaesthesia care unit, at 4 hours post extubation, at 24 hours and on postoperative day 3. The perceived quality of the awareness episode, intraoperative dreaming, and sequelae were investigated. The anaesthetic records were reviewed to search for data that might explain the awareness episode.

Results: The study included 350 patients. Calculated incidence of intraoperative awareness was 1.4% (5 out of 350 patients). Out of which 1.1% patients (i.e. 4 out of 350) were considered to have ‘definite awareness’ and 0.3% patient (one patient) was categorized as ‘possible awareness’.

Conclusions: Incidence of awareness during general anaesthesia was found 1.4%. Inspite of not using benzodiazepine, opioids and volatile anaesthetics before baby delivery in sizeable number of patients, it is a reassuring to know that incidence of awareness is lesser than assumed (3%).

Key words: Caesarean section, Consciousness, General Anaesthesia, Intraoperative awareness, Obstetric Anaesthesia, Post traumatic stress disorder






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