Background and aim
Shivering is common in patients undergoing caesarean delivery (CD) under spinal anaesthesia, and can have negative perioperative consequences. Preoperative anxiety has been implicated as a potential non-thermogenic risk factor for post-spinal shivering, although data from obstetric patients is only emerging. This study was conducted to ascertain the relationship between preoperative anxiety and post-spinal shivering in obstetric patients.
Methods
Patients ≥18 years and undergoing non-elective CD (Royal College of Obstetricians and Gynaecologists Categories 2, 3) under spinal anaesthesia were enrolled in this prospective observational study in a university teaching hospital. Preoperative anxiety was assessed using the visual analogue scale (VAS), correlated with the occurrence of post-spinal shivering and analysed using univariate and multivariate logistic regression models.
Results
Of the 150 patients enrolled, 55 (37 %) experienced post-spinal shivering. The relative risk (95 % CI) of post-spinal shivering in patients with high VAS preoperative anxiety was 2.3 (1.4 - 4.0); p = 0.001. VAS anxiety (aOR 1.55; 95 % CI:1.25–1.92; p = 0.001) and history of previous neuraxial anaesthesia for CD (aOR 0.23; 95 % CI: 0.07–0.69; p = 0.009) were independent predictors of shivering after spinal anaesthesia.
Conclusion
High preoperative anxiety is an independent risk factor for post-spinal shivering during non-elective CD. A previous history of neuraxial anaesthesia for prior CD is protective for post-spinal shivering in these patients. Specific perioperative interventions to mitigate patients’ preoperative anxiety might reduce the incidence of post-spinal shivering in these patients, potentially improving perceived quality of care being provided.
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