Effect of dehydration on cardiovascular responses and electrolytes after hypertonic saline/dextran treatment for moderate hemorrhage.

Abstract:

STUDY OBJECTIVE:To determine if hypertonic saline/dextran (HSD) is effective in treating hemorrhage in the presence of dehydration. DESIGN:After surgical preparation, swine were euhydrated or dehydrated for 24 or 48 hours. Animals were bled 25 mL/kg over 60 minutes and treated with HSD. SETTING:Laboratory. PARTICIPANTS:Seventeen immature Yorkshire pigs. INTERVENTIONS:4 mL/kg HSD (7.5% NaCl in 6% dextran-70) administered over one minute. MEASUREMENTS AND MAIN RESULTS:All euhydrated animals survived; 100% of the pigs survived 180 minutes after treatment. Two animals dehydrated for 24 hours and three animals dehydrated for 48 hours died within three hours of HSD treatment. In all groups, plasma potassium was reduced significantly and equally; cardiac output was increased; mean arterial pressure rose rapidly within first five minutes, but was sustained only in euhydrated animals; hematocrit, hemoglobin, and plasma total protein levels were reduced; and plasma glucose increased with persistent between-group differences. RESULTS:HSD immediately rectified the decreases in mean arterial pressure and cardiac output incurred during hemorrhage; over time, however, the improvement in pressure was not sustained in dehydrated pigs. Parallel increases in plasma osmolality and sodium concentrations were offset by the initial group differences resulting from dehydration. CONCLUSION:Dehydration does not compromise the efficacy of HSD as a resuscitation treatment for hemorrhagic shock.

journal_name

Ann Emerg Med

authors

Wade CE,Tillman FJ,Loveday JA,Blackmon A,Potanko E,Hunt MM,Hannon JP

doi

10.1016/s0196-0644(05)80143-x

subject

Has Abstract

pub_date

1992-02-01 00:00:00

pages

113-9

issue

2

eissn

0196-0644

issn

1097-6760

pii

S0196-0644(05)80143-X

journal_volume

21

pub_type

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