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ORIGINAL ARTICLE
Year : 2021  |  Volume : 65  |  Issue : 13  |  Page : 12-19

Effects of ventilation mode type on intra-abdominal pressure and intra-operative blood loss in patients undergoing lumbar spine surgery: A randomised clinical study


1 Department of Anaesthesia, Dayanand Medical College and Hospital, Ludhiana, Punjab, India
2 Department of Anaesthesia, PGIMER, Chandigarh, India
3 Department of Anaesthesia, Maharishi Markandeshwar (Deemed University), Mullana, Ambala, Haryana, India

Correspondence Address:
Neeru Luthra
Department of Anaesthesia, Dayanand Medical College and Hospital, Ludhiana. H. No. 1227/2b/1, Lane No. 2, Kitchlu Nagar Extn, Ludhiana, Punjab
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ija.IJA_706_20

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Background and Aims: The aim of the study was to evaluate the effect of mode of mechanical ventilation; pressure-controlled ventilation (PCV) vs. volume-controlled ventilation (VCV) on airway pressures, intra-abdominal pressure (IAP) and intra-operative surgical bleeding in patients undergoing lumbar spine surgery. Methods: This was a prospective, randomised study that included 50 American Society of Anesthesiologists class I and II patients undergoing lumbar spine surgery who were mechanically ventilated using PCV or VCV mode. The respiratory parameters (peak and plateau pressures) and IAP were measured after anaesthesia induction in supine position, 10 min after the patients were changed from supine to prone position, at the end of the surgery in prone position, and after the patients were changed from prone to supine position. The amount of intraoperative surgical bleeding was measured by objective and subjective methods. Results: The primary outcome was the amount of intraoperative surgical bleeding. It was significantly less in the PCV group than in the VCV group (137 ± 24.37 mL vs. 311 ± 66.98 mL) (P = 0.000). Similarly, on comparing other parameters like peak inspiratory pressures, plateau pressures and IAP, the patients in PCV group had significantly lower parameters than those in VCV group (P < 0.05). No harmful events were recorded. Conclusion: In patie,nts undergoing lumbar spine surgery, use of PCV mode decreased intraoperative surgical bleeding, which may be related to lower intraoperative respiratory pressures and IAP.


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