Pulmonary and extrapulmonary effects of increased colloid osmotic pressure during endotoxemia in rats.
Chest
; 120(5): 1655-62, 2001 Nov.
Article
em En
| MEDLINE
| ID: mdl-11713150
ABSTRACT
OBJECTIVES:
We tested the hypothesis that an increase in the blood colloid osmotic pressure (COP) that is maintained during early-stage endotoxemia may decrease fluid flux across capillaries and may reduce pulmonary and multiple-organ edema.DESIGN:
Prospective study. SETTINGS Research laboratory in a hospital.SUBJECTS:
Male albino Sprague-Dawley rats.INTERVENTIONS:
Rats were anesthetized with pentobarbital, underwent tracheotomies, were cannulated in the femoral vein and artery, and were randomly assigned to the following four groups comprising 11 rats each group I, controls (saline solution treatment); group II, albumin treatment (three doses of 1 g/kg 25% human albumin every 2 h); group III, endotoxin treatment with a single IV dose of 4 mg/kg endotoxin; and group IV, endotoxin and albumin-treatment (4 mg/kg endotoxin plus albumin treatment). Experiments lasted for 6 h while fluid intake was equally maintained in all groups. MEASUREMENTS ANDRESULTS:
COP and other variables were measured every 2 h. To determine the water content of an organ, after the rat was killed, the lung, heart, kidney, intestine, and liver were removed. Albumin treatment alone (group II) generated significant increases in COP (maximum, 58% from the baseline measurement) but did not change the water content of the organ, compared with saline solution-treated controls. Endotoxin-treated rats (group III) developed significant reductions in COP, with significant increases in pulmonary, renal, and heart water content compared with controls. Albumin treatment in endotoxemic rats (group IV) significantly increased the COP without improving the endotoxemia-induced organ edema. Pulmonary edema, however, was increased further, compared with endotoxemia alone.CONCLUSIONS:
COP elevation by albumin administration during the early stage of endotoxemia does not ameliorate pulmonary or multiple-organ edema and may aggravate pulmonary edema.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Edema Pulmonar
/
Equilíbrio Hidroeletrolítico
/
Água Corporal
/
Permeabilidade Capilar
/
Endotoxemia
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Risk_factors_studies
Limite:
Animals
Idioma:
En
Revista:
Chest
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Estados Unidos