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A comparison of the haemodynamic effects of lateral and sitting positions during induction of spinal anaesthesia for caesarean section.
Int J Obstet Anesth. 2013 Apr; 22(2):124-8.IJ

Abstract

BACKGROUND

Hypotension during spinal anaesthesia occurs commonly in parturients. By influencing spread of local anaesthetic, maternal position may affect the speed of onset of sensory block and thus the haemodynamic effects. The aim of this study was to determine whether inducing spinal anaesthesia for caesarean section using plain bupivacaine in the lateral position would result in less hypotension compared with the sitting position.

METHODS

One hundred American Society of Anesthesiologists physical status I and II patients undergoing elective caesarean section were randomised to receive spinal anaesthesia in the lateral position (Group L) or the sitting position (Group S). Using the L3-4 interspace, patients received intrathecal plain bupivacaine, 10mg or 12 mg according to their height, after which they were placed immediately in the supine position with left uterine displacement. Maternal blood pressure was measured every minute for 10 min, every three min for 20 min and 5-minutely thereafter. Hypotension was defined as a fall in systolic blood pressure >20% or a value <90 mmHg.

RESULTS

There was no difference in the lowest recorded systolic blood pressure in Group L (99.2±8.9 mmHg) compared with Group S (95.4±12.3 mmHg, P=0.081). However, the lowest recorded mean arterial pressure was greater in Group L (72.9±11.2 mmHg) than in Group S (68.2±9.6 mmHg; P=0.025). The incidence of hypotension was lower in Group L (17/50, 34%) than in Group S (28/50, 56%; P=0.027). Onset of hypotension was similar between groups.

CONCLUSION

Hypotension occurred less frequently when spinal anaesthesia for caesarean using plain bupivacaine was induced with patients in the lateral compared with the sitting position. Values for the lowest recorded mean arterial pressure were greater but values for the lowest recorded systolic blood pressure were similar for patients in the lateral position group.

Authors+Show Affiliations

Department of Anaesthesia, University of Port Harcourt Teaching Hospital, Port Harcourt, Nigeria.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

23453465

Citation

Obasuyi, B I., et al. "A Comparison of the Haemodynamic Effects of Lateral and Sitting Positions During Induction of Spinal Anaesthesia for Caesarean Section." International Journal of Obstetric Anesthesia, vol. 22, no. 2, 2013, pp. 124-8.
Obasuyi BI, Fyneface-Ogan S, Mato CN. A comparison of the haemodynamic effects of lateral and sitting positions during induction of spinal anaesthesia for caesarean section. Int J Obstet Anesth. 2013;22(2):124-8.
Obasuyi, B. I., Fyneface-Ogan, S., & Mato, C. N. (2013). A comparison of the haemodynamic effects of lateral and sitting positions during induction of spinal anaesthesia for caesarean section. International Journal of Obstetric Anesthesia, 22(2), 124-8. https://doi.org/10.1016/j.ijoa.2012.12.005
Obasuyi BI, Fyneface-Ogan S, Mato CN. A Comparison of the Haemodynamic Effects of Lateral and Sitting Positions During Induction of Spinal Anaesthesia for Caesarean Section. Int J Obstet Anesth. 2013;22(2):124-8. PubMed PMID: 23453465.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A comparison of the haemodynamic effects of lateral and sitting positions during induction of spinal anaesthesia for caesarean section. AU - Obasuyi,B I, AU - Fyneface-Ogan,S, AU - Mato,C N, Y1 - 2013/02/27/ PY - 2012/06/25/received PY - 2012/11/29/revised PY - 2012/12/16/accepted PY - 2013/3/5/entrez PY - 2013/3/5/pubmed PY - 2013/9/26/medline SP - 124 EP - 8 JF - International journal of obstetric anesthesia JO - Int J Obstet Anesth VL - 22 IS - 2 N2 - BACKGROUND: Hypotension during spinal anaesthesia occurs commonly in parturients. By influencing spread of local anaesthetic, maternal position may affect the speed of onset of sensory block and thus the haemodynamic effects. The aim of this study was to determine whether inducing spinal anaesthesia for caesarean section using plain bupivacaine in the lateral position would result in less hypotension compared with the sitting position. METHODS: One hundred American Society of Anesthesiologists physical status I and II patients undergoing elective caesarean section were randomised to receive spinal anaesthesia in the lateral position (Group L) or the sitting position (Group S). Using the L3-4 interspace, patients received intrathecal plain bupivacaine, 10mg or 12 mg according to their height, after which they were placed immediately in the supine position with left uterine displacement. Maternal blood pressure was measured every minute for 10 min, every three min for 20 min and 5-minutely thereafter. Hypotension was defined as a fall in systolic blood pressure >20% or a value <90 mmHg. RESULTS: There was no difference in the lowest recorded systolic blood pressure in Group L (99.2±8.9 mmHg) compared with Group S (95.4±12.3 mmHg, P=0.081). However, the lowest recorded mean arterial pressure was greater in Group L (72.9±11.2 mmHg) than in Group S (68.2±9.6 mmHg; P=0.025). The incidence of hypotension was lower in Group L (17/50, 34%) than in Group S (28/50, 56%; P=0.027). Onset of hypotension was similar between groups. CONCLUSION: Hypotension occurred less frequently when spinal anaesthesia for caesarean using plain bupivacaine was induced with patients in the lateral compared with the sitting position. Values for the lowest recorded mean arterial pressure were greater but values for the lowest recorded systolic blood pressure were similar for patients in the lateral position group. SN - 1532-3374 UR - https://www.unboundmedicine.com/medline/citation/23453465/A_comparison_of_the_haemodynamic_effects_of_lateral_and_sitting_positions_during_induction_of_spinal_anaesthesia_for_caesarean_section_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0959-289X(12)00164-1 DB - PRIME DP - Unbound Medicine ER -