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Differential effects of anesthetic agents on regional blood flow and central hemodynamic parameters in rats
Author(s) -
Vasthare Usha S.,
Irion Glenn L.,
Carlsson Christer,
Tuma Ronald F.
Publication year - 1988
Publication title -
drug development research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.582
H-Index - 60
eISSN - 1098-2299
pISSN - 0272-4391
DOI - 10.1002/ddr.430140105
Subject(s) - chloralose , pentobarbital , anesthetic , stroke volume , hemodynamics , anesthesia , cardiac output , blood flow , renal blood flow , chemistry , vascular resistance , cerebral blood flow , blood pressure , medicine , heart rate
Three commonly used anesthetic agents (pentobarbital, chloralose‐urethane, and inactin) were studied in a rat model. The radiolabeled microsphere technique was used to evaluate rats anesthetized (no reaction to pain stimulus) with the three drugs as compared to awake unanesthetized animals. Of the three anesthetic agents studied, pentobarbital caused the smallest alteration in central hemodynamic parameters. Chloralose‐urethane significantly lowered cardiac output (56%), stroke volume (35%), and minute work (51%). Chloralose‐urethane also significantly increased total peripheral resistance (59%). Inactin at the concentration used in the present study had very little effect on cardiac index, heart rate, stroke volume, and minute work but significantly increased total peripheral resistance and mean arterial pressure. All three anesthetic agents reduced cerebral and skeletal muscle blood flows equally. While pentobarbital and chloralose‐urethane significantly decreased renal blood flow (33%), inactin did not change flow to the kidney. It is concluded that anesthetic agents used in small animal experiments should be chosen carefully so that they do not influence blood flow to the organ being studied.