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Cardiac output and propofol concentrations in prone surgical patients. 2011

K Leslie, and C Y X Wu, and A R Bjorksten, and D L Williams, and G Ludbrook, and E Williamson
Department of Anaesthesia and Pain Management, Royal Melbourne Hospital, University of Melbourne, Melbourne, Victoria. kate.leslie@mh.org.au

The aim of this study was to compare cardiac output and plasma propofol concentrations in the supine and prone positions in healthy adult patients presenting for lumbar spine surgery. Patients received propofol and remifentanil via effect-site steered target-controlled infusions. Cardiac output and plasma propofol concentration were compared during 20 minutes in the supine position and 20 minutes after positioning on a Wilson frame. Cardiac output did not change significantly over 20 minutes in either position (P = 0.37) and was similar at 20 minutes in the supine (6.1 [1.6] l/minute) and prone positions (6.1 [1.9] l/minute) (P = 0.87). Propofol concentrations were similar in the supine and prone positions at 20 minutes (2.55 [0.89] and 2.53 [0.90] microg/ml; P = 0.93). We conclude that prone positioning on the Wilson frame does not affect cardiac output or plasma propofol concentration.

UI MeSH Term Description Entries
D011446 Prospective Studies Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group. Prospective Study,Studies, Prospective,Study, Prospective
D002302 Cardiac Output The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat). Cardiac Outputs,Output, Cardiac,Outputs, Cardiac
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D015742 Propofol An intravenous anesthetic agent which has the advantage of a very rapid onset after infusion or bolus injection plus a very short recovery period of a couple of minutes. (From Smith and Reynard, Textbook of Pharmacology, 1992, 1st ed, p206). Propofol has been used as ANTICONVULSANTS and ANTIEMETICS. Disoprofol,2,6-Bis(1-methylethyl)phenol,2,6-Diisopropylphenol,Aquafol,Diprivan,Disoprivan,Fresofol,ICI-35,868,ICI-35868,Ivofol,Propofol Abbott,Propofol Fresenius,Propofol MCT,Propofol Rovi,Propofol-Lipuro,Recofol,2,6 Diisopropylphenol,ICI 35,868,ICI 35868,ICI35,868,ICI35868
D016683 Supine Position The posture of an individual lying face up. Dorsal Position,Dorsal Positions,Position, Dorsal,Position, Supine,Positions, Dorsal,Positions, Supine,Supine Positions
D016684 Prone Position The posture of an individual lying face down. Position, Prone,Positions, Prone,Prone Positions
D018686 Anesthetics, Intravenous Ultrashort-acting anesthetics that are used for induction. Loss of consciousness is rapid and induction is pleasant, but there is no muscle relaxation and reflexes frequently are not reduced adequately. Repeated administration results in accumulation and prolongs the recovery time. Since these agents have little if any analgesic activity, they are seldom used alone except in brief minor procedures. (From AMA Drug Evaluations Annual, 1994, p174) Intravenous Anesthetic,Intravenous Anesthetics,Anesthetic, Intravenous
D019637 Orthopedic Procedures Procedures used to treat and correct deformities, diseases, and injuries to the MUSCULOSKELETAL SYSTEM, its articulations, and associated structures. Orthopedic Surgery,Surgery, Orthopedic,Orthopedic Rehabilitation Surgery,Orthopedic Surgical Procedures,Orthopedic Procedure,Orthopedic Rehabilitation Surgeries,Orthopedic Surgeries,Orthopedic Surgical Procedure,Procedure, Orthopedic,Procedure, Orthopedic Surgical,Procedures, Orthopedic,Procedures, Orthopedic Surgical,Rehabilitation Surgeries, Orthopedic,Rehabilitation Surgery, Orthopedic,Surgeries, Orthopedic,Surgeries, Orthopedic Rehabilitation,Surgery, Orthopedic Rehabilitation,Surgical Procedure, Orthopedic,Surgical Procedures, Orthopedic

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