title: Cardiovascular effect of 7.5% sodium chloride-dextran infusion after thermal injury.
abstract: OBJECTIVE
  Clinical study can help determine the safety and cardiovascular and systemic effects of an early infusion of 7.5% sodium chloride in 6% dextran-70 (hypertonic saline-dextran-70 [HSD]) given as an adjuvant to a standard resuscitation with lactated Ringer (RL) solution following severe thermal injury.
  
  
  METHODS
  Prospective clinical study.
  
  
  METHODS
  Intensive care unit of tertiary referral burn care center.
  
  
  METHODS
  Eighteen patients with thermal injury over more than 35% of the total body surface area (TBSA) (range, 36%-71%) were studied.
  
  
  METHODS
  Eight patients (mean +/- SEM, 48.2% +/- 2% TBSA) received a 4-mL/kg HSD infusion approximately 3.5 hours (range, 1.5-5.0 hours) after thermal injury in addition to routine RL resuscitation. Ten patients (46.0% +/- 6% TBSA) received RL resuscitation alone.
  
  
  METHODS
  Pulmonary artery catheters were employed to monitor cardiac function, while hemodynamic, metabolic, and biochemical measurements were taken for 24 hours.
  
  
  RESULTS
  Serum troponin I levels, while detectable in all patients, were significantly lower after HSD compared with RL alone (mean +/- SEM, 0.45 +/- 0.32 vs 1.35 +/- 0.35 microg/L at 8 hours, 0.88 +/- 0.55 vs 2.21 +/- 0.35 microg/L at 12 hours). While cardiac output increased proportionately between 4 and 24 hours in both groups (from 5.79 +/- 0.8 to 9.45 +/- 1.1 L/min [mean +/- SEM] for HSD vs from 5.4 +/- 0.4 to 9.46 +/- 1.22 L/min for RL), filling pressure (central venous pressure and pulmonary capillary wedge pressure) remained low for 12 hours after HSD infusion (P = .048). Total fluid requirements at 8 hours (2.76 +/- 0.7 mL/kg per each 1% TBSA burned [mean +/- SEM] for HSD vs 2.67 +/- 0.24 mL/kg per each 1% TBSA burned for RL) and 24 hours (6.11 +/- 4.4 vs 6.76 +/- 0.75 mL/kg per each 1% TBSA burned) were similar. Blood pressure remained unchanged, and serum sodium levels did not exceed 150 +/- 2 mmol/L (mean +/- SD) in either group.
  
  
  CONCLUSIONS
  The absence of deleterious hemodynamic or metabolic side effects following HSD infusion in patients with major thermal injury confirms the safety of this resuscitation strategy. Postburn cardiac dysfunction was demonstrated in all burn patients through the use of cardiospecific serum markers and pulmonary artery catheter monitoring. Early administration of HSD after a severe thermal injury may reduce burn-related cardiac dysfunction, but it had no effect on the volume of resuscitation or serum biochemistry values.
authors.affiliation: Department of Surgery, University of Texas Southwestern Medical Center, Dallas 75235, USA. jmurph@mednet.swmed.edu
authors.forename: J T
authors.initials: JT
authors.lastname: Murphy
authors.forename: J W
authors.initials: JW
authors.lastname: Horton
authors.forename: G F
authors.initials: GF
authors.lastname: Purdue
authors.forename: J L
authors.initials: JL
authors.lastname: Hunt
mesh_terms: D000328:Adult; D002056:Burns / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D003911:Dextrans / Q000008:administration & dosage* / Q000494:pharmacology; D005260:Female; D006439:Hemodynamics / Q000187:drug effects*; D006801:Humans; D007262:Infusions, Intravenous; D008297:Male; D010952:Plasma Substitutes / Q000008:administration & dosage* / Q000494:pharmacology; D011446:Prospective Studies; D012965:Sodium Chloride / Q000008:administration & dosage*
chemical_list: D003911:Dextrans; D010952:Plasma Substitutes; D012965:Sodium Chloride