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The effect of milrinone on induced hypotension in elderly patients during spinal surgery: a randomized controlled trial.

AbstractBACKGROUND CONTEXT:
Induced hypotension is widely used intraoperatively to reduce blood loss and to improve the surgical field during spinal surgery.
PURPOSE:
To determine the effect of milrinone on induced hypotension during spinal surgery in elderly patients.
STUDY DESIGN/SETTING:
Prospective randomized clinical trial.
PATIENT SAMPLE:
Forty patients, 60 to 70 years old, ASA I-II, who underwent elective lumbar fusion surgery.
OUTCOME MEASURES:
Intraoperative hemodynamics, blood loss, hourly urine output, and grade of surgical field.
METHODS:
All patients were randomized to group M or N. The study drug was infused after perivertebral muscle retraction until complete interbody fusion. In group M, 50 μg/kg/min of milrinone was infused over 10 minutes as a loading dose followed by 0.6 μg/kg/min of milrinone as a continuous dose. In group N, an identical volume of normal saline was infused in the same fashion. This study was not funded by commercial or other sponsorship and the authors confirm no conflicts of interest, financial or otherwise.
RESULTS:
During infusion of the study drug, the systolic and mean blood pressures were maintained within adequate limits of induced hypotension in group M. Intraoperative blood loss was 445.0±226.5 mL in group M and 765.0±339.2 mL in group N (p=.001). Hourly urine output was 1.4±0.6 mL in group M and 0.8±0.2 mL in group N (p<.001). The grade of the surgical field was better in group M than in group N (p=.004).
CONCLUSIONS:
We conclude that milrinone is useful for induced hypotension in elderly patients during spinal surgery.
AuthorsWonjung Hwang, Eunsung Kim
JournalThe spine journal : official journal of the North American Spine Society (Spine J) Vol. 14 Issue 8 Pg. 1532-7 (Aug 01 2014) ISSN: 1878-1632 [Electronic] United States
PMID24331842 (Publication Type: Journal Article, Randomized Controlled Trial)
CopyrightCopyright © 2014 Elsevier Inc. All rights reserved.
Chemical References
  • Vasodilator Agents
  • Milrinone
Topics
  • Aged
  • Blood Loss, Surgical (prevention & control)
  • Double-Blind Method
  • Elective Surgical Procedures
  • Female
  • Hemodynamics
  • Humans
  • Hypotension (chemically induced)
  • Lumbar Vertebrae (surgery)
  • Male
  • Middle Aged
  • Milrinone (therapeutic use)
  • Prospective Studies
  • Spinal Fusion (methods)
  • Treatment Outcome
  • Vasodilator Agents (therapeutic use)

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