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J Reconstr Microsurg 2022; 38(01): 075-083
DOI: 10.1055/s-0041-1731302
Original Article

Intraoperative Vasopressor Usage in Free Tissue Transfer: Should We Be Worried?

Samuel P. Munro 
1   Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
,
Chad Chang
2   Department of Plastic Surgery, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
,
Rory J. Tinker
3   Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
,
Iain B. Anderson
2   Department of Plastic Surgery, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
,
Geoff C. Bedford
4   Department of Anesthesia, Freeman Hospital, Newcastle upon Tyne, United Kingdom
,
Maniram Ragbir
2   Department of Plastic Surgery, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
,
Omar A. Ahmed 
2   Department of Plastic Surgery, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
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Abstract

Background The role of vasopressors has long been a subject of debate in microsurgery. Conventional wisdom dictates the avoidance of vasopressor use, due to concerns such as peripheral vasoconstriction, inducing vasospasm of the anastomoses, and leading to failure in perfusion. It has since become common practice in some centers to avoid intraoperative vasopressor use during free tissue transfer surgery. Recent studies have suggested that this traditional view may not be supported by clinical evidence. However, none of these studies have separated vasopressor use by method of administration.

Methods We conducted a retrospective review of our experience of vasopressor use in free flap surgery at a single high-volume center. The outcome measures were flap failure, flap-related complications and overall postoperative complications (reported using the Clavien–Dindo classification). Groups were compared using Chi-square or Fisher's Exact test where appropriate.

Results A total of 777 cases in 717 patients were identified. 59.1% of these had vasopressors administered intraoperatively. The overall failure rate was 2.2%, with 9.8% experienced flap-related complications. There was no difference in flap loss when vasopressors were administered, but an increased rate of microvascular thrombosis was noted (p = 0.003). Continuous administration of vasopressors was associated with reduced venous congestion, whereas intermittent boluses increased risk of microvascular thrombosis.

Conclusion Our study confirms previous findings that intraoperative vasopressor use in free flap surgery is not associated with increased failure rate. Administering vasopressors continuously may be safer than via repeated boluses.

Keywords

vasopressors - flap failure - microsurgery - thrombosis - free flap

Supplementary Material



Publication History

Received: 18 November 2020

Accepted: 07 May 2021

Article published online:
06 July 2021

© 2021. Thieme. All rights reserved.

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333 Seventh Avenue, 18th Floor, New York, NY 10001, USA

 

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